report: industrial hygiene exposure assessment and … · report: industrial hygiene exposure...

Report: Industrial Hygiene Exposure

Assessment and Air Sampling of Designated Work Activities

During the Hurricane Sandy Gas Restoration Event

Prepared for: National Grid

Syracuse, New York

Prepared by: ENVIRON International Corporation

Boston, Massachusetts

Date: January 2013

Project Number: 08-26448B

Contents i ENVIRON

Contents Page

1 Executive Summary 1

2 Introduction 5

3 Standard and Guidelines 7 3.1 Personal and Area Air Sampling 7

4 Sampling, Analysis, and Monitoring Methods 8 4.1 Personal and Area Air Sampling 13 4.2 Real-Time, Direct-Reading Instrumentation Measurements 13

5 Results, Conclusions, and Recommendations 14

List of Tables

Excel Worksheet Title: Summary Air Sampling Results Table 1: Summary of Regulatory Permissible Exposure Limits (PELs) Table 2: Summary Results of Personal Air and Area Air Sampling for Fibers (as Asbestos)

[Long-Term] Table 3: Summary Results of Personal Air and Area Air Sampling for Fibers (as Asbestos)

[Short-Term – Excursion Limit] Table 4: Summary Results of Personal Air Sampling for Respirable Particulate and

Crystalline Silica Table 5: Real-Time, Direct-Read Measurements for Respirable Particulate Provided Separately as PDF files: Employee Notification Form – Network Infrastructure Employee Notification Form – Premier Employee Notification Form – NGRID CMS Employee Notification Form – NGRID Construct Employee Notification Form – Vectren

List of Appendices

Appendix A: Analytical Laboratory Reports –Fibers (as Asbestos) Phase Contrast Microscopy Appendix A: Analytical Laboratory Reports – Fibers (as Asbestos) Transmission Electron

Microscopy Appendix B: Analytical Laboratory Report – Respirable Particulate and Crystalline Silica Appendix C: OSHA E-Tool Calculations for Crystalline Silica Appendix D: Photo log Appendix E: Proposed Sampling Plan (email excerpt 11/10/12)

1

1 Executive Summary National Grid (NGRID) retained ENVIRON International Corporation (ENVIRON) to conduct an industrial hygiene exposure assessment and air sampling during gas restoration work activities in the aftermath of Hurricane Sandy (October 29-30, 2012) that severely impacted the Northeastern United States (US). On November 10, 2012, Mr. Corey Briggs, CIH, CET, CIT of ENVIRON’s Boston office was contacted by Ms. Kathleen H. Smith, Director of Safety, Health, and Environment, to provide onsite industrial hygiene assessment and air sampling services for employees who were conducting work activities in the impacted areas of Brooklyn, Breezy Point, Long Island, Staten Island, and Roxbury. Mr. Briggs was informed that the assessment and sampling were going to be conducted to evaluate the risk of potential worker exposure to selected air contaminants of concern. With this in mind, and while developing the proposed sampling plan, ENVIRON and NGRID utilized existing information based upon Ms. Smith’s onsite observations, government recommendations on protecting responders after hurricanes and flood events, and industry knowledge of potential air contaminant hazards encountered during outdoor-related work, as well as response to water intrusion, to develop an initial scope of work to assess the most likely and hazardous air contaminant exposures. Deemed of most concern was work in areas where there was potential exposure to asbestos, respirable dust, and crystalline silica from hurricane debris piles, accumulated sand, construction/excavation work, vehicle movement, and demolition activities.

With respect to areas impacted by the extensive flooding, mold, bacteria, and other microbes were assumed to be present and employee protection was to be provided by a combination of administrative controls, management practices, the use of appropriate personal protective equipment, good personal hygiene, and prompt medical treatment of any cuts or puncture wounds. Also, with regard to the outdoor and intermittent indoor work activities, sampling for naturally-occurring microorganisms like bacteria and mold is not typically conducted due to the fact that 1) there are no established exposure levels/standards and 2) outdoor concentrations are typically utilized as the “normal background” for comparison purposes in indoor air quality studies and microbial investigation and remediation. Inorganic lead and polychlorinated biphenyls (PCBs) were also discussed but determined to be secondary concerns from an exposure standpoint due to the existing environmental conditions. If results from the initial respirable dust monitoring and sampling were of note, these materials would have been considered for evaluation.

After approval of the scope of work, ENVIRON began the process of conducting the industrial hygiene exposure assessment and air sampling during gas restoration work activities. Representatives from ENVIRON’s New England Business Unit mobilized to the site and conducted the industrial hygiene sampling and exposure assessment during gas restoration work activities from November 12- 20, 2012.ENVIRON’s assessment included both qualitative and quantitative assessments of gas restoration work activities in the most severely storm-impacted areas of Brooklyn, Breezy Point, Roxbury, Long Island and Staten Island. National Grid’s representatives indicated to ENVIRON that the gas restoration work that was to be conducted in these locations would represent a “worst case scenario” for the purposes of evaluating potential exposures of gas and electrical restoration personnel to the selected air contaminants.

2

At the request of NGRID, the assessment initially focused on the work activities conducted by employees in the Customer Meter Service (CMS) Department. On November 14, 2012, Mr. Chris Conlon, NGRID Director of Process Safety requested that employees in the Construction and Maintain (Construct/Maintain) Departments also be monitored. Although, ENVIRON was instructed to monitor only NGRID employees, due to the nature of the gas restoration work activities in wake of a catastrophic event, NGRID employees were not always available. Thus, with approval from onsite NGRID representatives, contractors performing similar NGRID CMS or Construct/Maintain type work, as well as consultants, were monitored.

ENVIRON’s assessment included the following tasks:

• Performing personal and area air sampling for Fibers (as Asbestos);

• Performing personal and area air sampling for Particulates Not Otherwise Classified - Respirable (PNOC-R), and Crystalline Silica (3 primary forms; quartz, tridymite, and cristobalite);

• Collecting real-time, direct-read measurements for respirable particulate and total volatile organic compounds (VOCs, as isobutylene) in the vicinity of the employee work activities. Please note that isobutylene is utilized as span gas for instrument calibration and as a reference for results; and

• Observing and documenting employee work activities and general work conditions in the impacted areas.

The personal and area air samples were collected during the sampling period for non-routine work activities. The results of the long-term and short-term personal air sampling were compared to the applicable Occupational Safety and Health Administration (OSHA) Permissible Exposure Limits (PELs).

Please note that area air samples were collected during our assessment and are typically used to screen a location or estimate a potential “worst case scenario” exposure event. They are typically not directly comparable to personal samples expressed as an eight-hour Time Weighted Average (8-hour TWA) and should not be used to show compliance with the OSHA PELs.

All sampling was conducted in accordance with the established industrial hygiene and industry best practices and standards and with ENVIRON’s November 10, 2012 proposal sent via email, and attached as Appendix E.

3

Results, Conclusions, and Recommendations

The results of the assessment along with our recommendations (in italics) are provided below. Please note that sampling results are representative of potential personal exposures on the particular day of sampling and reflect employee activities and operations. Also, please note that variations in equipment/process not in use, shift duties, length of the shift and tasks, etc. can affect exposure concentrations; in some cases, the personnel were working between 12 and 16 hour shifts in areas hardest hit by the storm.

As instructed by NGRID, ENVIRON has provided Microsoft Excel summary worksheets with detailed employee work activities and summary results. A short photo log has also been provided to document general work conditions. Real-time, direct-read respirable particulate measurements have also been provided.

Overall, none of the one hundred twenty one (121) area and personal samples collected between November 12 and November 20, 2012 in the hardest hit areas of the storm exceeded the OSHA Permissible Exposure Limits (PELs). Thus, respiratory protection would not have been required. ENVIRON was told that the employees who participated in the air sampling survey were to follow the applicable control measures (e.g. personal protective equipment [PPE]) as described in the “Safety Bulletin” and applicable safety and health protocols provided by the NGRID Safety, Environmental, and Health Department.

• All of the results of long-term (8 hour TWA) and short-term/excursion limit (30-minute) personal air sampling for Fibers (as Asbestos) were less than the OSHA PEL.

• The airborne concentrations of respirable particulate and crystalline silica for all of the 37 samples collected during the sampling survey were below the OSHA PEL-TWA of 5 mg/m3. The airborne concentration of 1 of the 37 samples in the Breezy Point area on November 19, 2012 was1.8 mg/m3 as an 8 hour TWA and approached the “calculated”* OSHA PEL-TWA of 2.4 mg/m3.

*There is not one crystalline silica exposure limit for all cases. Rather, the limit is derived from a calculation that takes into account the percentage of quartz, cristobalite, tridymite, and respirable dust specific to the particular work-site. When a percentage of quartz, cristobalite or tridymite is detected in a sample, a specific OSHA calculation is used to derive the sample specific PEL which is then compared to the specific exposure.

• The maximum real-time, direct-read measurement for respirable particulate was approximately 1.15 mg/m3 in an area of moderate sand coating and high vehicle traffic in the Rockaway West area of Long Island. From a “general comparison standpoint” since it is a real-time measurement and not a long-term personal air sample collected in the worker’s breathing zone, this airborne concentration is well below the OSHA PEL-TWA of 5 mg/m3 for respirable particulate.

• The results of the real-time, direct-read measurements for total volatile organic compounds, as isobutylene (TVOC) were “non-detectable”. The direct-read measurements collected by ENVIRON were as requested “spot checks” conducted during work activities in the various indoor basement locations for the employees being monitored (e.g., in response to reported odors)

4

Notify the affected National Grid employees and contract employees who participated in the study of the air sampling results in accordance with the provisions of the OSHA Standard 29 CFR 1910.1020, 1910.1001 and 1926.1101, and your internal employee exposure information notification practices. ENVIRON has provided Microsoft Excel summary worksheets with detailed employee work activities and results, employee notification forms which can be posted or distributed to employees and/or contractors who participated in the assessment.

The remainder of the report contains the details of the assessment, the list of Microsoft Excel tables that have been provided, and applicable appendices.

5

2 Introduction National Grid (NGRID) retained ENVIRON International Corporation (ENVIRON) to conduct an industrial hygiene exposure assessment and air sampling during gas restoration work activities in the aftermath of Hurricane Sandy (October 29-30, 2012) that severely impacted the Northeastern United States. On November 10, 2012, Mr. Corey Briggs, CIH, CET, CIT of ENVIRON’s Boston office was contacted by Ms. Kathleen H. Smith, Director of Safety, Health, and Environment, to provide onsite industrial hygiene assessment services for its employees who were conducting work activities in the impacted areas of Brooklyn, Breezy Point, Long Island, Staten Island, and Roxbury. ENVIRON was informed that the assessment was being conducted to evaluate the risk of potential worker exposure to selected air contaminants of concern. With this in mind, and while developing the proposed sampling plan, ENVIRON and NGRID utilized existing information based upon Ms. Smith’s onsite observations, government recommendations on protecting responders after hurricanes and flood events, and industry knowledge of potential air contaminant hazards encountered during outdoor-related work, as well as response to water intrusion, to develop an initial scope of work to assess the most likely and hazardous air contaminant exposures. Of most concern, was work in areas where there was potential exposure to asbestos, respirable dust, and crystalline silica from hurricane debris piles, accumulated sand, construction/excavation work, vehicle movement, and demolition activities.

With respect to areas impacted by the extensive flooding, mold, bacteria, and other microbes were assumed to be present and employee protection was to be provided by a combination of administrative controls, management practices, the use of appropriate personal protective equipment, good personal hygiene, and prompt medical treatment of any cuts or puncture wounds. Also, with regard to the outdoor and intermittent indoor work activities, sampling for naturally-occurring microorganisms like bacteria and mold is no typically conducted due to the fact that 1) there are no established exposure levels/standards and 2) outdoor concentrations are typically utilized as the “normal background” for comparison purposes in indoor air quality studies and microbial investigation and remediation. Inorganic lead and polychlorinated biphenyls (PCBs) were also discussed but determined to be secondary concerns from an exposure standpoint due to the existing environmental conditions. If results from the initial respirable dust monitoring and sampling were of note, these materials would have been considered for evaluation.

Ms. Kerry Ann Jaggassar, MS and Ms. Amber Stangroom, BS of ENVIRON’s New England Business Unit met Ms. Smith on November 11, 2012 and along with Mr. Chris James who joined the team on November 12, 2012 conducted the industrial hygiene sampling survey and exposure assessment during gas restoration work activities from November 12- 20, 2012.

ENVIRON’s assessment included both quantitative and qualitative assessments of gas restoration work activities in the most severely storm-impacted areas of Brooklyn, Breezy Point, Roxbury, Long Island and Staten Island. National Grid’s representatives indicated to ENVIRON that the gas restoration work that was to be conducted in these locations would represent a “worst case scenario” for the purposes of evaluating potential exposures of gas and electrical restoration personnel to the selected air contaminants.

6

At the request of NGRID, the assessment initially focused on the work activities conducted by employees in the Customer Meter Service (CMS) Department. On November 14, 2012, Mr. Chris Conlon, NGRID Director of Process Safety requested that employees in the Construction and Maintain (Construct/Maintain) Departments also be monitored. Although, ENVIRON was instructed to monitor only NGRID employees, due to the nature of the gas restoration work activities in wake of a catastrophic event, NGRID employees were not always available. Thus, with approval from onsite NGRID representatives, contractors performing similar NGRID CMS or Construct/Maintain type work, as well as consultants, were monitored.

The assessment included the following tasks:

• Performing personal and area air sampling for Fibers (as Asbestos);

• Performing personal and area air sampling for Particulates Not Otherwise Classified - Respirable (PNOC-R), and Crystalline Silica (3 primary forms; quartz, tridymite, and cristobalite);

• Collecting real-time, direct-read measurements for respirable particulate and total volatile organic compounds (VOCs, as isobutylene) in the vicinity of the employee work activities. Please note that isobutylene is utilized as span gas for instrument calibration and as a reference for results; and

• Observing and documenting employee work activities and general work conditions in the impacted areas

The personal and area air samples were collected during the sampling period for routine work activities conducted under abnormal work conditions. All long-term and short-term personal air sampling results were compared to the applicable Occupational Safety and Health Administration (OSHA) Permissible Exposure Limits (PELs).

Please note that area air samples were also collected during our assessment and are typically used to screen a location or estimate a potential “worst case scenario” exposure event. They are typically not directly comparable to personal samples expressed as an eight-hour Time Weighted Average (8-hour TWA) and should not be used to show compliance with the OSHA PELs.

All sampling was conducted in accordance with the established industrial hygiene and industry best practices and standards and with ENVIRON’s November 10, 2012 proposal sent via email, and attached as Appendix E.

7

3 Standard and Guidelines 3.1 Personal and Area Air Sampling

The following is a summary of the standards and guidelines used for ENVIRON's industrial hygiene assessment, results, interpretations, and recommendations.

The Occupational Safety and Health Administration (OSHA) has set forth general industry and construction standards (29 CFR 1910 and 1926) that identify maximum 8-hour time weighted averages (TWA) exposure limits, instantaneous ceiling exposure limits (C) and/or 15-minute short-term exposure limits (STEL) for specific airborne contaminants. These occupational exposure limits are referred to as OSHA's Permissible Exposure Limits (PELs) and are located in 29 CFR 1910.1000 and 29 CFR 1926 Subpart Z.

Substance-specific standards (e.g. PEL-TWAs and Excursion Limits) also exist for asbestos and are referenced in 29 CFR 1910.1001 and 29 CFR 1926.1101.

For respirable particulate and crystalline silica, a specific OSHA calculation is used to derive a PEL, which is then compared to the specific exposure. Details for the silica calculation using the OSHA eTool are provided in Appendix C.

Please note that area samples were collected during this assessment and are used to screen a location or estimate a potential worst-case scenario exposure event. They are typically not directly comparable to personal samples expressed as an 8-hour TWA and should not be used to show compliance with the OSHA PEL.

The OSHA Permissible Exposure Limits referred to in this report are summarized in tabular format in the attached Microsoft Excel worksheets listed under the tab ”Permissible Exposure Limit”.

8

4 Sampling, Analysis, and Monitoring Methods Prior to conducting the assessment, ENVIRON worked with Ms. Smith to develop the initial sampling and monitoring plan. The air contaminants of concern were identified based on initial discussions, descriptions of proposed work tasks, and available information regarding conditions in work areas as provided by Ms. Smith, as well as concerns expressed by workers. The initial work plan included air contaminants of concern believed to pose the largest exposure risk to personnel. The rationalization of the sampling plan is presented in Table 1.

Table 1: Sampling Plan Rationalization

Contaminant Methodology Rationale

Asbestos

NIOSH 7400 : Asbestos and other Fibers by Phase Contrast Microscopy (PCM)

Asbestos is an OSHA regulated substance and an overall employee exposure concern to NGRID. The risk of secondary exposure to NGRID employees due to demolition activities in adjacent work area (e.g. citizens removing debris from homes) needed to be evaluated along with NY Department of Sanitation removal of debris from roadways in vicinity of NGRID and contractor work activities; From a community exposure standpoint, the New York City Department of Environmental Protection had previously conducted area monitoring for potential asbestos at debris piles. Personal and area air sampling was conducted for comparison to calculated OSHA PELs. Analysis by PCM identifies total fiber count and thus further analysis by TEM was used to identify/confirm if asbestos fibers were present.

NIOSH 7402: Asbestos by Transmission Electron Microscopy (TEM)

9


Crystalline Silica (Quartz, Tridymite, and Cristobalite)

Modified NIOSH 7500/ OSHA ID-142:

Exposure risk due to environmental conditions in work areas such as, proximity to ocean front and large piles of sand, high traffic on roadways with heavy coating of sand (e.g., NY Department of Sanitation trucks and other vehicles); Potential exposure to Construct/Maintain employees who were drilling through concrete and/or asphalt to access subsurface lines. Personal air sampling was conducted for comparison to calculated OSHA PELs.

Respirable Particulate

Personal Air Sampling/ NIOSH 0600

Exposure risk due to movement of debris by home owners, relief organizations, high traffic roadways heavily coated with sand, drying flood conditions, etc.; Personal air sampling was conducted for comparison to OSHA PEL-TWA. The New York State Department of Environmental Protection also was conducting area air monitoring. Direct-read, real-time measurements used as a screening tool to assist in initial evaluations Periodic and intermittent dust conditions can be better evaluated measured with direct- read real-time instruments to give a “snap shot” of current conditions.

Area Sampling/ Direct-Read Real-Time measurements

10


Carbon Monoxide (CO), Hydrogen Sulfide (H2S), and Oxygen (O2), Flammable and combustible gases/vapors as a % of the Lower Explosive Limit (LEL)

Real time, Direct- Read [Multi-gas meter with a Photo-ionization detector (PID)]

Potential presence due to gas leaks, misuse of home generators, possible chemical spills in flooded basements, etc. These instruments were used where deemed appropriate and requested. Measurements were recorded if concerns regarding “chemical-type” odors were expressed by the employees being monitored.

Total Volatile Organic Compounds (TVOCs)

Mold N/A

Although molds and bacteria were obviously present, there are no methods for performing personal air sampling (especially for a mobile work force); ENVIRON was informed that PPE was available for NGRID employee use. With regard to the outdoor and intermittent indoor work activities, sampling for naturally-occurring microorganisms like bacteria and mold is not typically conducted due to the fact that 1) there are no established exposure levels/standards and 2) outdoor concentrations are typically utilized as the “normal background” for comparison purposes in indoor air quality studies and microbial investigation and remediation.

11


Lead N/A

Since it is naturally occurring in soil and has been historically introduced by deposition of lead gas emissions, etc., it was not deemed of importance due to the wet conditions that reduced the potential for exposure. If real-time measurements for respirable dust had detected from initial screenings, lead sampling would have been considered.

Polychlorinated Biphenyls (PCBs) N/A

If PCB contamination were present, it would likely be very localized rather than widespread; sampling methods difficult for a mobile work force (additional pump with filter and tube in series) could create hindrance for employee to safely complete his work task; sampling and analysis is very costly and time consuming; If real-time measurements for respirable dust had detected from initial screening, PCB sampling would have been considered.

Based on the available information available on November 10, 2012, NGRID and ENVIRON developed a sampling and monitoring plan (see Appendix E) which was implemented from November 12-20, 2012 primarily during daytime work activities. ENVIRON was told that NGRID employees were to follow the applicable safety and health protocols as published by the NGRID Safety, Environmental, and Health Department. Table 2 on the next page of the report summarizes the sampling activities conducted during the assessment.

12

Table 2: Summary of the Sampling, Analysis, and Monitoring Plan

Date Area

CMS Construct/Maintain

TOTALS Respirable

Particulate/Silica Fibers Respirable

Particulate/Silica Fibers PCM TEM PCM TEM

11/12/2012 Far Rockaway NA NA NA NA NA NA 11/13/2012 Staten Island 3 3 1 NA NA NA 7 Brooklyn/ Seagate 1 1 0 NA NA NA 2 Long Beach West 2 4 1 NA NA NA 7 11/14/2012 Staten Island 0 2 1 2 1 0 6 Brooklyn/ Seagate 1 1 0 NA NA NA 2 Long Beach West 2 4 1 NA NA NA 7 11/15/2012 Staten Island 1 7 4 0 1 0 13

Brooklyn/ Sheepshead Bay 0 0 0 2 4 1 7

Rockaway West* 3 6 1 0 0 0 10

11/16/2012 Staten Island/ Beacon-Hett 0 5 1 0 1 0 7

Brooklyn/ Seagate 2 2 1 0 0 0 5 Rockaway West 0 0 0 4 4 0 8

11/19/2012 Staten Island/ New Dorp & Midland 0 0 0 2 3 0 5

Roxbury 0 0 0 3 6 0 9 Breezy Point* 0 0 0 4 2 0 6 11/20/112 Staten Island NA NA NA NA NA NA 0 Roxbury 0 0 0 3 6 2 11 Inwood 2 5 2 0 0 0 9

TOTALS 17 40 13 20 28 3 121

RESPIRABLE DUST/SILICA*:

TOTAL SAMPLES COLLECTED 37

FIBERS: TOTAL SAMPLES COLLECTED 84

NA: Not Applicable * NGRID employees were not available, contractors monitored.

13

4.1 Personal and Area Air Sampling

All long-term and short-term personal air samples were collected within the worker’s breathing zone. Both long and short-term personal air samples and area air samples were collected using battery-powered, personal air-sampling pumps (e.g., SKC, MSA, etc.) that drew air at a constant flow rate. Each pump was calibrated before and after sampling using a Bios Defender™ primary calibrator. Due to extreme limitations with regard to accessing AC power, high-volume air sampling could not be conducted.

The following OSHA and NIOSH sampling and analytical methods were used during this project:

• NIOSH 7400 : Asbestos and other Fibers by Phase Contrast Microscopy (PCM) • NIOSH 7402: Asbestos by Transmission Electron Microscopy (TEM) • NIOSH 0600/7500: Modified OSHA ID-142: Particulates not Otherwise Classified

(NOC), Respirable Particulate and Crystalline Silica Field blanks for each of the analytes were submitted to the laboratory for quality control purposes.

All samples and sample blanks for Fibers (as Asbestos) collected during this survey were hand-delivered under Chain of Custody for various levels of expedited analysis to EMSL Analytical, Inc. in Carle Place, New York, an American Industrial Hygiene Association (AIHA) accredited laboratory.

All samples and sample blanks for respirable particulate and crystalline silica collected during this survey were sent under Chain of Custody for various levels of expedited analysis to Galson Laboratories in East Syracuse, New York an American Industrial Hygiene Association (AIHA) accredited laboratory.

4.2 Real-Time, Direct-Reading Instrumentation Measurements

Real-time, direct-read measurements were collected using various meters during indoor and outdoor gas restoration work activities at the various locations.

Area measurements for airborne respirable particulate were collected using calibrated and field zeroed portable real-time aerosol monitors (e.g. Thermo personal DataRAM Model PDR-1000AN and the TSI DustTrak Model 8520).

Since odors were periodically reported by personnel inside of buildings, real-time, direct-read area measurements for total volatile organic compounds were also collected using a calibrated Rae Systems MultiRAE “plus” to determine any potential exposure to volatile organic compounds, as isobutylene. Please note that isobutylene is utilized as span gas for instrument calibration and as a reference for results.

14

5 Results, Conclusions, and Recommendations The results of the assessment along with our recommendations (in italics) are provided below. Please note that sampling results are representative of potential personal exposures on the particular day of sampling and reflect employee activities and operations. Also, please note that variations in equipment/process not in use, shift duties, length of the shift and tasks, etc. can affect exposure concentrations; in some cases, the personnel were working between 12 and 16 hour shifts in areas hardest hit by the storm. As instructed by NGRID, ENVIRON has provided Microsoft Excel summary worksheets with detailed employee work activities and summary results. A short photo log has also been provided to document general work conditions. Real-time, direct-read respirable particulate measurements have also been provided. Overall, none of the one hundred twenty one (121) area and personal samples collected between November 12 and November 20, 2012 in the hardest hit areas of the storm exceeded the OSHA Permissible Exposure Limits (PELs). Thus, respiratory protection would not have been required. ENVIRON was told that the employees who participated in the air sampling survey were to follow the applicable control measures (e.g. personal protective equipment [PPE]) as described in the “Safety Bulletin” and applicable safety and health protocols provided by the NGRID Safety, Environmental, and Health Department.

• All of the results of long-term (8 hour TWA) and short-term/excursion limit (30-minute) personal air sampling for Fibers (as Asbestos) were less than the OSHA PEL.

• The airborne concentrations of respirable particulate and crystalline silica for all of the 37 samples collected during the sampling survey were below the OSHA PEL-TWA of 5 mg/m3. The airborne concentration of 1 of the 37 samples in the Breezy Point area on November 19, 2012 was1.8 mg/m3 as an 8 hour TWA and approached the “calculated”* OSHA PEL-TWA of 2.4 mg/m3.

*There is not one crystalline silica exposure limit for all cases. Rather, the limit is derived from a calculation that takes into account the percentage of quartz, cristobalite, tridymite, and respirable dust specific to the particular work-site. When a percentage of quartz, cristobalite or tridymite is detected in a sample, a specific OSHA calculation is used to derive the sample specific PEL which is then compared to the specific exposure.

• The maximum real-time, direct-read measurement for respirable particulate was approximately 1.15 mg/m3 in an area of moderate sand coating and high vehicle traffic in the Rockaway West area of Long Island. From a “general comparison standpoint” since it is a real-time measurement and not a long-term personal air sample collected in the worker’s breathing zone, this airborne concentration is well below the OSHA PEL-TWA of 5 mg/m3 for respirable particulate.

• The results of the real-time, direct-read measurements for total volatile organic compounds, as isobutylene (TVOC) were “non-detectable”. The direct-read measurements collected by ENVIRON were as requested “spot checks” conducted during work activities in the various indoor basement locations for the employees being monitored (e.g., in response to reported odors)

15

Notify the affected National Grid employees and contract employees who participated in the study of the air sampling results in accordance with the provisions of the OSHA Standard 29 CFR 1910.1020, 1910.1001 and 1926.1101, and your internal employee exposure information notification practices. ENVIRON has provided Microsoft Excel summary worksheets with detailed employee work activities and results, employee notification forms which can be posted or distributed to employees and/or contractors who participated in the assessment.

16

Tables (See attached files)

Excel Worksheet Title: Summary Air Sampling Results

Table 1: Summary of Regulatory and Consensus Occupational Exposure Limits (OELs) Table 2: Summary Results of Personal Air and Area Air Sampling for Fibers (as Asbestos)

[Long-Term] Table 3: Summary Results of Personal Air and Area Air Sampling for Fibers (as Asbestos)

[Short- Term] Table 4: Summary Results of Personal Air Sampling for Respirable Particulate and

Crystalline Silica Table 5: Real-Time, Direct-Read Measurements for Respirable Particulate Provided Separately as PDF files: Employee Notification Form – Network Infrastructure Employee Notification Form – Premier Employee Notification Form – NGRID CMS Employee Notification Form – NGRID Construct Employee Notification Form – Vectren

List of Appendices (See attached PDF files)

List of Appendices

Appendix A: Analytical Laboratory Reports – Fibers (as Asbestos) Phase Contrast Microscopy Appendix A: Analytical Laboratory Reports – Fibers (as Asbestos) Transmission Electron

Microscopy Appendix B: Analytical Laboratory Report – Respirable Particulate and Crystalline Silica Appendix C: OSHA E-Tool Calculations for Crystalline Silica Appendix D: Photo log Appendix E: Proposed Sampling Plan (email excerpt 11/10/12)

Tables:

Summary Air Sampling Results

Table 1 : Summary of OSHA Permissible Exposure Limites (PELs)

Asbestos

Crystalline Silica (Respirable Fraction)

Particulates Not Otherwise Classified (PNOC), Respirable (Respirable Particulate)

Abbreviations

TWA Time Weighted Averagemg/m3 Milligrams per cubic meter

Quartz: 10 mg/m3 / (%SiO2 +2)

Cristobalite: 1/2 the Quartz PEL

Tridymite: 1/2 the Quartz PEL

5 mg/m3

Table 1 : Summary of OSHA Permissible Exposure Limites (PELs)

Air ContaminantOSHA PEL

(8-hour TWA unless otherwise noted)

0.1 f/cc 1 f/cc (30-minute Excursion Limit)

Table 2: Results of Personal Air and Area Sampling for Fibers (as Asbestos) [Long-Term]

Work Area(specific)

National Grid Yard or Staging Area Company

11/19/2012 11192-PG327-MA02 061210859-0002 Breezy Point/ Roxbury Roxbury Roxbury Auriemma, Matt National Grid Const/ Maintain Local 101

The employee is a senior supervisor and spent his day checking on crews completing various gas construction tasks, including meter checks, valve installation, turning off services, and preparation for a gas main purge. The employee spent the entire day outdoors and walking, at times around sandy holes.

On the day of sampling the conditions were dry and breezy, little sand and debris present along walking paths, some dust generated when debris removed.

General PPE worn by the employee included work issued FR-Rated long sleeve shirt and pants, high visibility vest, hard hat, safety glasses, and safety shoes.

518 257 0.015 0.008 NA NA

11/19/2012 111912-P1453-JH05 061210859-0009 Breezy Point/ Roxbury Breezy Point Breezy Point Hellberg, Jimmy Network Infrastructure* Construct/NI NA

The contractor turned off gas lines at the street and prepped purge points in the main. The employee spent the entire day outdoors, and at times in or around sandy holes.

On the day of sampling the conditions were dry and breezy, heavy coating of sand and debris present along roadways, some dust generated when vehicular traffic was present in immediate vicinity of the work area.

General PPE worn by the employee included high visibility vest and safety shoes.

910 346 0.034 0.025 NA NA

11/19/2012 111912-PG107-NL04 061210859-0004 Breezy Point/ Roxbury Roxbury Roxbury Lagana, Nunzio National Grid Const/ Maintain Local 101

The employee turned off gas lines at the street and prepped purge points in the main. The employee spent the entire day outdoors, at times in or around sandy holes.



461 266 0.019 0.011 NA NA

11/19/2012 111912-PG300-JP03 061210859-0003 Breezy Point/ Roxbury Roxbury Roxbury Penatello, Joe National Grid Const/ Maintain (did CMS-type work)

Local 101

The employee surveyed meters outside of homes or in crawlspaces.



675 334 0.015 0.010 NA NA

11/19/2012 111912-P180-MS02 061210859-0008 Breezy Point/ Roxbury Breezy Point Breezy Point Stanley, Mike Network Infrastructure* Construct/NI NA




738 360 0.016 0.012 NA NA

TEMAsbestos Concentration

(f/cc) [as an 8-hr TWA]

PCMFiber Concentration

Reported (f/cc)

PCM Fiber Concentration

(f/cc) [as an 8-hr TWA]

Work Area(broad) Union

Table 2: Results of Personal Air and Area Sampling for Fibers (as Asbestos) [Long-Term]National Grid - Hurricane Sandy Gas Restoration Phase Contrast Microscopy (PCM): NIOSH 7400

Transmission Electron Microscopy (TEM): NIOSH 7402November 13 - 20, 2012

Date Sample Number Laboratory ID General Work ActivitySample Volume

(Liters)Sample Time

(Minutes)Employee Name

(Last, First) Department

AdjustedTEM

Asbestos Concentration

Reported (f/cc)


11/19/2012 111912-PG027-AT01 061210859-0001 Breezy Point/ Roxbury Roxbury Roxbury Traina, Antonino National Grid Const/ Maintain Local 101

The employee checked meters, prepped purge points in the main, turned off gas lines at the street, and aided others in various gas construction tasks. The employee spent the entire day outdoors, at times in or around sandy holes.



592 292 0.015 0.009 NA NA

11/20/2012 112012-P462-01A 061210916-0003 Breezy Point/ Roxbury Roxbury NA **Area Sample NA Construct NAStatic/stationary area sample collected in immediate proximity of I&R crew as part of main line super purge and adjacent to active debris pile and disposal operations.

704 297 0.005 NA <0.004 NA

11/20/2012 112012-P980-02A 061210916-0004 Breezy Point/ Roxbury Roxbury NA **Area Sample NA Construct NARoaming area sample collected in immediate proximity of I&R crew as part of main line super purge and adjacent to active debris pile and disposal operations.

1211 511 0.010 NA <0.002 NA

11/20/2012 112012-PG300-SD06 061210915-0008 Breezy Point/ Roxbury Roxbury Roxbury Digiovanna, Sal National Grid Const/ Maintain Local 101

The employee excavated, drained, and purged a main and took pressure readings at meters. The employee spent the entire day outdoors, at times near sandy holes.



675 335 0.008 0.006 NA NA

11/20/2012 112012-PG027-KF05 061210915-0007 Breezy Point/ Roxbury Roxbury Roxbury Fraser, Ken National Grid Const/ Maintain Local 101

The employee aided other crew members in various gas construction tasks. The employee spent the entire day outdoors, at times near sandy holes.



643 318 0.012 0.008 NA NA

11/20/2012 112012-PG060-MG07 061210915-0009 Breezy Point/ Roxbury Roxbury Roxbury Gregory, Matt Premier* Const/ Maintain NA

The contractor checked for gas leaks and elevated levels of carbon monoxide at homes and along streets. The contractor spent the entire day outdoors.


General PPE worn by the contractor included high visibility vest, hard hat, safety glasses, and safety shoes.

647 317 0.016 0.011 NA NA

11/20/2012 112012-P1441-JL-02C 061210916-0002 Breezy Point/ Roxbury Roxbury Roxbury Lioce, Jack National Grid Construct Local 101

Main gas line super purge and service connection shutoffs and safety checks.

PPE observed included hard hats, safety glasses, high visibility vests, long pants and shirts, and boots. Direct reading instruments were used to determine the buildup of gas or CO at premises.

789 333 0.010 0.007 NA NA

11/13/2012 111312-PG169-FC01 061210603-0001 Brooklyn Seagate Canarsie Cinque, Frank National Grid CMS Local 101

The employee served as the crew leader, he designated field tasks to the team. The employee performed two inspections to confirm that equipment was intact and service could be restored.

On the day of sampling the conditions were wet with intermittent showers, dirt and debris along the roadways were wet, minimal dust was generated.

General PPE worn by the employee included work issued FR-Rated long sleeve shirt and pants, safety glasses, high visibility vests, and safety shoes.

430 225 0.009 0.004 NA NA


11/13/2012 111312-FB-BI 612100603-0001 Brooklyn Seagate NA Field Blank NA NA Local 101 NA NA NA ND NA NA NA

11/14/2012 111412-PG107-FB02 061210663-0006 Brooklyn Seagate Canarsie Braga, Frank National Grid CMS Local 101

The employee performed home inspections, checked for gas leaks in a home, including appliances, checked gas meter indoors, and restored gas service. The employee spent approximately 60 minutes indoors; the remainder of the day was spent outdoors or in the service truck, and at times in or around debris piles.



850 428 0.009 0.008 NA NA

11/14/2012 111412-FB02-AS08 061210663-0005 Brooklyn Seagate NA Field Blank NA NA NA NA NA NA ND NA NA NA

11/15/2012 111512-PG035-RC03 061210714-0003 Brooklyn Sheepshead Bay Canarsie Covucci, Robert National Grid Const/Maintain Local 101

Work involved gaining access to main/service lines below grade. The employee operated the dig-it to gain access to the main line for shut off. The employee checked regulators on the exterior of condemned homes, prepped purge points in the main, shut off gas lines at the street, and aided others in various gas construction tasks. The employee spent the majority of his work shift outdoors.

On the day of sampling the conditions were dry and breezy, sand and debris present along roadways, minimal dust generated when vehicles passed by.

General PPE worn by the employee included high visibility vest, hard hat, safety glasses, and safety shoes. Hearing protection was worn while jackhammering.

438 219 0.018 0.008 NA NA

11/15/2012 111512-FB01-AS10 061210714-0011 Brooklyn Sheepshead Bay NA Field Blank NA NA NA NA NA NA ND NA NA NA

11/15/2012 111512-PG169-KG01 061210714-0001 Brooklyn Sheepshead Bay Canarsie George, Kareem National Grid Const/Maintain Local 101

The employee checked meters, prepped purge points in the main, turned off gas lines at the street, and aided others in various gas construction tasks. The employee spent the majority of his shift outdoors. The employee also used a jackhammer for approximately 60 minutes of his shift, to break concrete pavement in search of a main valve. The employee swept up the dirt for approximately 15 minutes around the backfilled hole at the completion of his task.

On the day of sampling the conditions were dry and breezy, minimum sand and debris present along pavement.

General PPE worn by the employee included work issued FR-Rated long sleeve shirt and pants, safety glasses, high visibility vests, and safety shoes. Additional PPE worn when using a jack hammer includes hearing protection.

595 308 0.026 0.017 NA NA

11/15/2012 111512-PG154-SP04 061210714-0004 Brooklyn Sheepshead Bay Canarsie Price, Sean National Grid Const/Maintain Local 101

The employee checked for gas leaks in a home, monitored purge points in the main, and turned off gas lines at the street. The employee spent approximately 75 minutes indoors; the remainder of the day was spent outdoors. Some sand, dirt and debris was present along the walkways where work activity was performed.

On the day of sampling the conditions were dry and breezy, little sand and debris present along walking paths, some dust generated when debris was removed.


609 308 0.011 0.007 NA NA

11/15/2012 111512-PG032-SS02 061210714-0002 Brooklyn Sheepshead Bay Canarsie Sipp, Steve National Grid Const/Maintain Local 101

The employee checked regulators, prepped purge points in the main, performed troubleshooting activities to ensure that water was purged from the main line prior to shut off, turned off gas lines at the street, and supported others in various gas construction tasks. The gas meters were located on the exterior of the home between narrow alleyways.

On the day of sampling the conditions were dry and breezy, some sand and debris present along alleyways.


668 340 0.052 0.037 <0.004 <0.0028


11/16/2012 111612-PG154-JC02 061210800-0002 Brooklyn Seagate Canarsie Caprino, John National Grid CMS Local 101

The employee performed home inspections, checked for gas leaks in a home, including appliances, checked gas meter indoors, and restored gas service. The employee spent approximately 60 minutes indoors; the remainder of the day was spent outdoors or in the service truck, at times in or around debris piles. Some work activity conducted in wet basement, wet sand and debris observed in workspace.

On the day of sampling the conditions were dry and breezy, heavy coating of sand and debris present along pavement and roadways. Some dust generated when debris was removed by the New York Department of Sanitation.


676 345 0.021 0.015 NA NA

11/16/2012 111612-FB01-AS09 061210800-0009 Brooklyn Seagate NA Field Blank NA NA NA NA NA NA ND NA NA NA

11/16/2012 111612-PG035-KM01 061210800-0001 Brooklyn Seagate Canarsie Mooney, Kevin National Grid CMS Local 101

The employee performed home inspections, checked for gas leaks in a home, including appliances, checked gas meter indoors, and restored gas service. The employee spent approximately 75 minutes indoors; the remainder of the day was spent outdoors or in the service truck, at times in or around debris piles.



666 335 0.034 0.024 <0.004 <0.0028

11/16/2012 111612-PG169-JR04 061210800-0004 Brooklyn Seagate Canarsie Rodriguez, Julio National Grid CMS Local 101

The employee performed home inspections, checked for gas leaks in a home, including appliances, checked gas meter indoors, and restored gas service. The employee spent approximately 75 minutes indoors; the remainder of the day was spent outdoors or in the service truck, and at times in or around debris piles.


General PPE worn by the employee included work issued FR-Rated long sleeve shirt and pants, high visibility vest, safety glasses, hard hat, and safety shoes.

671 347 0.018 0.013 NA NA

11/16/2012 111612-PG032-RT03 061210800-0003 Brooklyn Seagate Canarsie Tancreto, Richie National Grid CMS Local 101

The employee changed meters and regulators and measured the pressure in lines. A large portion of the day was spent in the vehicle completing paperwork.

On the day of sampling the conditions were dry and breezy, sand and debris along the roadways were drying, slight dust generated when vehicles passed and when debris was removed.


640 330 0.017 0.012 NA NA

11/13/2012 111312-PG327A-CC01AM 061210607-0001 Long Island Long Beach West Long Beach West Conine, Chris National Grid CMS Local 1027

The employee did home inspections, and tasks included turning safety valves on or off as needed and clocking meters . When the employee could not get into a home, he spent his time checking for gas leaks around the perimeter of the home. The employee spent approximately 80 minutes inside homes; the rest was spent outdoors or in the vehicle.

On the day of sampling the conditions were wet with intermittent showers, dirt and debris along the roadways were wet, minimal dust was generated. Standing sewage was observed in one basement.

General PPE worn by the employee included work issued FR-Rated long sleeve shirt and pants, high visibility vest, safety glasses, hard hat, work gloves, and safety shoes with covers.

244 120 0.018 0.012 NA NA


11/13/2012 111312-PG327A-CC04PM 061210607-0002 Long Island Long Beach West Long Beach West Conine, Chris National Grid CMS Local 1027

The employee did home inspections, and tasks included turning safety valves on or off as needed and clocking meters . When the employee could not get into a home, he spent his time checking for gas leaks around the perimeter of the home. The employee spent approximately 80 minutes inside homes; the rest was spent outdoors or in the vehicle.


General PPE worn by the employee included work issued FR-Rated long sleeve shirt and pants, high visibility vest, safety glasses, hard hat, work gloves, and safety shoes with covers.

338 166 0.023 0.012 <0.008 <0.0028

11/13/2012 111312-FBA-AS07 061210607-0003 Long Island Long Beach West NA Field Blank NA NA NA NA NA NA ND NA NA NA

11/13/2012 111312-PG060A-JG03AM 061210606-0001 Long Island Long Beach West Long Beach West Gavel, John National Grid CMS Local 1027

The employee did home inspections, and tasks included inspecting meters and doing paperwork . The employee spent approximately 50 minutes inside homes; the rest was spent outdoors or in the vehicle.


General PPE worn by the employee included work issued FR-Rated long sleeve shirt and pants, high visibility vest, safety glasses, hard hat, work gloves, and safety shoes.

267 129 0.025 0.017 NA NA

11/13/2012 111312-PG060A-JG05PM 061210606-0002 Long Island Long Beach West Long Beach West Gavel, John National Grid CMS Local 1027




110 53 0.094 0.017 NA NA

11/14/2012 111412-PG027-MF02 061210663-0002 Long Island Long Beach West Long Beach West Fearon, Mike National Grid CMS Unknown

The employee changed meters and regulators and measured the pressure in lines. A large portion of the day was spent in the vehicle or at the staging area since the employee was on-call. The employee spent approximately 125 minutes in homes.

On the day of sampling the conditions dry and breezy, sand and debris along the roadways were drying, slight dust generated when vehicles passed and when debris removed.


809 411 0.020 0.017 NA NA

11/14/2012 111412-FB02-AS08 061210663-0005 Long Island Long Beach West NA Field Blank NA NA NA NA NA NA ND NA NA NA

11/14/2012 111412-PG300-JL01 061210663-0001 Long Island Long Beach West Long Beach West Laponte, Jim National Grid CMS Unknown


On the day of sampling the conditions were dry and breezy, sand and debris along the roadways were drying, slight dust generated when vehicles passed and when debris removed.


832 419 0.017 0.015 NA NA


11/14/2012 111412-PG327-CM05 061210663-0004 Long Island Long Beach West Long Beach West Manning, Cecil National Grid CMS/ GFO Unknown

The employee changed meters, relit homes, checked for gas leaks in the street, and did paperwork until the last hour of monitoring period, when he joined a GFO crew purging a line. The employee spent the majority of the day outside or in the vehicle, with approximately 15 minutes spent in homes.



705 375 0.021 0.016 NA NA

11/14/2012 111412-PG060-WM04 061210663-0003 Long Island Long Beach West Long Beach West Miles, William National Grid CMS/ GFO Unknown

The employee changed meter and relit homes until the last hour of monitoring period, when he joined a GFO crew purging a line. The employee spent the majority of the day outside, with approximately 15 minutes spent in homes.



712 372 0.036 0.028 <0.004 <0.0031

11/15/2012 111512-PG107-JB01 061210714-0005 Long Island Rockaway West Rockaway West Beard, John Vectren* CMS NA

The contractor completed turn ons and checked for gas leaks in and around homes. The contractor encountered 3 CGI's and spent approximately 200 minutes in homes, with the remainder spent outside or in the vehicle.

On the day of sampling the conditions were dry and breezy, sand and debris present along roadways, some dust generated when vehicles passed and when debris removed. One home had several inches of standing water and a moldy odor.

General PPE worn by the contractor included work issued FR-Rated long sleeve shirt and pants, high visibility vest, safety glasses, hard hat, and safety shoes.

815 406 0.028 0.024 NA NA

11/15/2012 111512-FB01-AS10 061210714-0011 Long Island Rockaway West NA Field Blank NA NA NA NA NA NA ND NA NA NA

11/15/2012 111512-PG060-DH05 061210714-0006 Long Island Rockaway West Rockaway West Hagy, Dave Vectren* CMS NA

The contractor completed turn ons in homes and on the street and changed regulators. The contractor spent approximately 85% of his day in homes.

On the day of sampling the conditions were dry and breezy, sand and debris present along roadways, some dust generated when vehicles passed and when debris removed. Three homes were having demolition work done while contractor was inside, wet and filled with construction debris.


800 407 0.037 0.031 NA NA

11/15/2012 111512-PG327-RH06 061210714-0007 Long Island Rockaway West Rockaway West Hottinger, Randy Vectren* CMS NA

The contractor changed regulators and meters and completed turn-ons. The contractor spent approximately 90% of his day in homes.

On the day of sampling the conditions were dry and breezy, sand and debris present along roadways, some dust generated when vehicles passed and when debris removed. One home was visibly dusty; the remainder were damp and already gutted.


726 362 0.050 0.038 <0.004 <0.0030

11/15/2012 111512-PG027-CL08 061210714-0009 Long Island Rockaway West Rockaway West Lemming, Chris Vectren* CMS NA

The contractor changed regulators and meters. The contractor spent approximately 140 minutes inside homes; the rest was spent outdoors or in the vehicle.

On the day of sampling the conditions were dry and breezy, sand and debris present along roadways, some dust generated when vehicles passed and when debris removed. One home had demolition going on while contractor was inside; the remainder were damp and already gutted.


638 319 0.039 0.026 NA NA


11/15/2012 111512-P1129-DR07 061210714-0008 Long Island Rockaway West Rockaway West Rager, Dan Vectren* CMS NA

The contractor completed turn-ons and relights. The contractor spent approximately 260 minutes inside six homes; the rest was spent outdoors or in the vehicle.

On the day of sampling the conditions were dry and breezy, sand and debris present along roadways, some dust generated when vehicles passed and when debris removed. One home had a gaseous odor; one home had an improperly vented generator; one home had approximately 4 inches of standing water and was dusty.


716 356 0.025 0.019 NA NA

11/15/2012 111512-PG300-GS09 061210714-0010 Long Island Rockaway West Rockaway West Steelsmith, Greg Vectren* CMS NA

The contractor completed turn-ons. The contractor spent approximately 120 minutes inside homes; the rest was spent outdoors or in the vehicle.

On the day of sampling the conditions were dry and breezy, sand and debris present along roadways, some dust generated when vehicles passed and when debris removed. The contractor encountered at least four CGIs.


650 326 0.018 0.012 NA NA

11/16/2012 111612-PG107-WC04 061210800-0006 Long Island Rockaway West Rockaway West Cort, Wilton National Grid Const/ Maintain Local 101

The employee shoveled out the gas main in the street to look for water and reported to a gas leak. The employee spent approximately 30 minutes inside one home; the rest was spent outdoors standing in or adjacent to sandy holes.

On the day of sampling the conditions were dry and breezy, sand and debris present along roadways, some dust generated when vehicles passed and when debris removed.

General PPE worn by the employee included work issued FR-Rated coveralls, high visibility vest, and safety shoes. Hard hat was worn improperly.

863 425 0.02 0.018 NA NA

11/16/2012 111612-PG027-MD01 061210800-0005 Long Island Rockaway West Rockaway West Dimario, Mike National Grid Const/ Maintain Local 101

The employee tested the pressure at various meters and observed crew looking for water in the main and purging it. The employee spent approximately 70 minutes inside homes; the rest was spent outdoors standing adjacent to sandy holes.

On the day of sampling the conditions were dry and breezy, sand and debris present along roadways, some dust generated when vehicles passed and when debris removed. Dust was observed when pipe cutter was turned on in employee's vicinity.


665 330 0.024 0.017 NA NA

11/16/2012 111612-FB01-AS09 061210800-0009 Long Island Rockaway West NA Field Blank NA NA NA NA NA NA ND NA NA NA

11/16/2012 111612-PG327-AJ05 061210800-0007 Long Island Rockaway West Rockaway West Jenkins, Anthony National Grid Const/ Maintain Local 101

The employee shoveled out the gas main in the street to look for water and checked the pressure. The employee spent the entire day outdoors standing in or adjacent to sandy holes.


General PPE worn by the employee included work issued FR-Rated long sleeve shirt and pants, hard hat, and safety shoes.

869 414 0.030 0.026 NA NA


11/16/2012 111612-PG060-EK08 061210800-0008 Long Island Rockaway West Rockaway West King, Eric National Grid Const/ Maintain Local 101

The employee jackhammered and shoveled out the gas main in the street to look for water and reported to a gas leak. The employee spent approximately 30 minutes inside one home; the rest was spent outdoors standing in or adjacent to sandy holes.



827 406 0.014 0.012 NA NA

11/20/2012 112012-P1453-TEM05 061210915-0003 Long Island Arverne NA **Area Sample NA CMS NARoaming area sample collected in immediate proximity of CMS crew conducting house inspections.

1414 410 0.006 0.005 <0.002 <0.0017

11/20/2012 112012-PG035-TEM04 061210915-0002 Long Island Arverne Rockaway East Astle, Dan National Grid CMS NA

The employee performed home inspections, checked for gas leaks in a home, including appliances (red-tagging), checked gas meter indoors, restored gas service and relit appliances . The employee spent approximately 40 % of his shift indoors.

On the day of sampling the conditions were dry, with a light breeze, heavy coating of sand along pavement and roadways. Some dust generated when debris was removed by the New York Department of Sanitation.


924 315 0.035 0.023 <0.003 <0.0020

11/20/2012 112012-PG154-F02 061210915-0001 Long Island Arverne Rockaway East Espinosa, Ken National Grid CMS NA




804 420 0.02 0.018 NA NA

11/20/2012 112012-FB02-AS08 061210915-0010 Long Island Arverne NA Field Blank NA NA NA NA NA NA ND NA NA NA

11/20/2012 112012-F08 061210915-0005 Long Island Arverne Rockaway East Nunez, George National Grid CMS NA




502 243 0.021 0.011 NA NA

11/19/2012 111912-FB01-AS07 061210859-0007 Roxbury/Breezy Point Roxbury/Breezy Point NA Field Blank NA NA NA NA NA NA ND NA NA NA11/20/2012 112012-FB1C 061210916-0005 Roxbury/Breezy Point Roxbury NA Field Blank NA NA NA NA NA NA ND NA NA NA11/20/2012 112012-FB02-AS08 061210915-0010 Roxbury/Breezy Point Roxbury NA Field Blank NA NA NA NA NA NA ND NA NA NA11/13/2012 Field Blank 061210604-0004 Staten Island NA NA Field Blank NA NA NA NA NA NA ND NA NA NA

11/13/2012 111312-04-JT-01 061210604-0001 Staten Island NA Staten Island (200 Gulf Ave)

Trezzino, James National Grid CMS Local 3

Regulator and, as needed, meter change-outs at Hunter/Freeborn/Mapleton Avenues. Work consisted of identifying regulators and/or meters in need of replacement; work involved removal of gas piping for retrofitting with new regulators and/or meters.

Weather was wet and cold.

PPE worn included hard hats, safety glasses, high visibility vests, long pants and shirts, and work boots.

162 81 0.045 <0.021 <0.017 <0.0029






394 197 <0.007 <0.021 NA NA







368 184 0.028 <0.021 NA NA

11/14/2012 111412-04/02-AD-01C 061210719-0001 Staten Island NA Staten Island (200 Gulf Ave)

DeSposito, Anthony National Grid Construct Local 3

Service line repairs at Cedar Grove Avenue/near New Dorp Ave. Work involved identifying areas for asphalt cuts using a jack hammer and excavator to remove road surface and subsurface soils to gain access to main/service lines below grade.

A great deal of traffic in area for debris pile cleanup and removal as well as street cleaning equipment in proximity to work performed. Weather was dry and cool.

PPE observed included hard hats, safety glasses, high visibility vests, boots and long pants.

331 176 0.04 0.015 NA NA

11/14/2012 FB1C 061210719-0002 Staten Island NA NA Field Blank NA NA NA NA NA NA ND NA NA NA11/14/2012 FB1 061210720-0003 Staten Island NA NA Field Blank NA NA NA NA NA NA ND NA NA NA

11/14/2012 111412-03-JO-01 061210720-0001 Staten Island NA Staten Island (200 Gulf Ave)

O'Mallen, Jerry National Grid CMS Local 3

Home safety inspections; work involved observations of regulators and meters for recent change-outs or still in need of some; entering premises to view gas operated heaters and stoves for safe usage.

Weather was dry and cold.

PPE worn included hard hats or bump caps, safety glasses, high visibility vests, long pants and shirts, and work boots. Direct reading instruments were used to determine presence or build-up of gas or CO at homes.

481 256 0.054 0.048 <0.006 <0.0032

11/14/2012 111412-03-JO-02 061210720-0002 Staten Island NA Staten Island (200 Gulf Ave)

O'Mallen, Jerry National Grid CMS Local 3

Home safety inspections; work involved observations of regulators and meters for recent change-outs or still in need of some; entering premises to view gas operated heaters and stoves for safe usage.

Weather was dry and cold.

PPE worn included hard hats or bump caps, safety glasses, high visibility vests, long pants and shirts, and work boots. Direct reading instruments were used to determine presence or build-up of gas or CO at homes.

585 311 0.030 0.048 NA NA

11/15/2012 111512-P676-01A 061210726-0001 Staten Island NA NA **Area Sample NA CMS/Construct NAArea sample collected in immediate proximity of emergency shutoff/mobile command center at Beacon/Hett intersection.

858 362 0.003 NA <0.003 <0.0023

11/15/2012 111512-P980-02A 061210726-0002 Staten Island NA NA **Area Sample NA CMS/Construct NAArea Sample collected in immediate proximity of emergency shutoff/mobile command center at Beacon/Hett intersection.

858 362 0.003 NA <0.003 <0.0023

11/15/2012 111512-04-PA-01 061210717-0001 Staten Island NA Staten Island (200 Gulf Ave)

Abdo, Peter National Grid CMS Local 3

Home safety inspections and response to emergency shutoff work at Beacon/Hett Avenue area. Emergency shutoff work involved orchestration with Construct Department for isolating the main gas line for water purging operations, shutoff of service lines to customers.

PPE observed included hard hats, safety glasses, high visibility vests, long pants and shirts, and boots.

498 265 0.022 0.020 <0.006 <0.0033

11/15/2012 111512-04-PA-04 061210717-0004 Staten Island NA Staten Island (200 Gulf Ave)




222 118 0.034 0.020 NA NA

11/15/2012 111512-P462-DA-01C 061210718-0001 Staten Island NA Staten Island (200 Gulf Ave)

Agnone, Dominick National Grid Construct Local 3

Operation of drip truck/water purge from main gas line at emergency shutoff area at Beacon/Hett Avenues.


313 132 0.041 0.011 NA NA

11/15/2012 111512-05-RC-05 061210717-0005 Staten Island NA Staten Island (200 Gulf Ave)

Campbell, Ray National Grid CMS Local 3

Emergency shutoff work at Beacon/Hett Avenue area.

PPE observed included hard hats, safety glasses, high visibility vests, long pants and shirts, and boots. Direct reading instruments were used to determine gas or CO buildup at premises.

314 167 0.019 0.007 NA NA


11/15/2012 111512-03-AC-03 061210717-0003 Staten Island NA Staten Island (200 Gulf Ave)

Christiansen, Adam National Grid CMS Local 3

Home safety inspections near Oceanic/Cuba Avenues.


549 292 0.016 0.010 NA NA

11/15/2012 111512-FB1 061210717-0006 Staten Island NA Na Field Blank NA NA NA NA NA NA ND NA NA NA11/15/2012 111512-FB1C 061210718-0002 Staten Island NA NA Field Blank NA NA NA NA NA NA ND NA NA NA11/15/2012 111512-FB1A 061210726-0003 Staten Island NA NA Field Blank NA NA NA NA NA NA ND NA NA NA

11/15/2012 111512-02-DT-02 061210717-0002 Staten Island NA Staten Island (200 Gulf Ave)

Tartaglia, Dominick National Grid CMS Local 3



831 442 0.032 0.029 <0.003 <0.0028

11/16/2012 111612-P1035-PA-02 061210822-0002 Staten Island NA Staten Island (200 Gulf Ave)


Re-assigned from home safety inspections at Cuba Ave and immediate vicinity to regular customer calls/hookups on west side of Hylan Blvd; multiple locations.


182 97 <0.015 0.015 NA NA

11/16/2012 111612-P1035-PA-05 061210822-0005 Staten Island NA Staten Island (200 Gulf Ave)


Re-assigned from home safety inspections at Cuba Ave and immediate vicinity to regular customer calls/hookups on west side of Hylan Blvd; multiple locations.


551 293 0.019 0.015 NA NA

11/16/2012 111612-P980-RF-01 061210822-0001 Staten Island NA Staten Island (200 Gulf Ave)

Farquhar, Rick National Grid CMS Local 3

Home safety inspections near Cuba Ave.


667 355 0.018 0.013 <0.004 <0.0030

11/16/2012 111612-FB1 061210822-0006 Staten Island NA NA Field Blank NA NA NA NA NA NA ND NA NA NA

11/16/2012 111612-P676-JK-03 061210822-0003 Staten Island NA Staten Island (200 Gulf Ave)

Kearney, Joseph National Grid CMS Local 3



662 352 0.016 0.012 NA NA

11/16/2012 111612-P462-AP-04 061210822-0004 Staten Island NA Staten Island (200 Gulf Ave)

Pinto, Andrew National Grid CMS Local 3



669 356 0.018 0.013 NA NA

11/19/2012 111912-FB1M 061210860-0004 Staten Island NA NA Field Blank NA NA NA NA NA NA ND NA NA NA

11/19/2012 111912-P676-JP-02M 061210860-0002 Staten Island NA Staten Island (200 Gulf Ave)

Plastino, Joe National Grid Construct Local 3

Excavation and trenching of main gas line and service connection replacement as well as replacement of service line to 248 Grimsby Ave.

PPE observed included hard hats, safety glasses, high visibility vests, long pants and shirts, and boots. Gloves used as needed.

732 309 0.025 0.016 NA NA

11/19/2012 111912-P1035-TV-01M 061210860-0001 Staten Island NA Staten Island (200 Gulf Ave)

Vollaro, Tommy National Grid Construct Local 3

Excavation and trenching of main gas line and service connection replacement as well as replacement of service line to 248 Grimsby Ave.

PPE observed included hard hats, safety glasses, high visibility vests, long pants and shirts, and boots. Gloves used as needed.

453 191 0.068 0.027 NA NA

* In the absence of available National Grid employees personal air sampling was conducted on contractors performing work task similar to that of a National Grid employee.

Note: The field blank sample result for Asbestos was below the analytical detection limit of 5.5 Fibers/ 100 Fields.

OSHA PEL - 8 hour (TWA unless otherwise indicated)

0.1 f/cc

**Please note that area samples are used to screen a location or estimate a potential worst case scenario exposure event, are typically not directly comparable to personal samples expressed as an eight-hour Time Weighted Average (8-hour TWA), and should not be used to show compliance with the OSHA PELs.

Table 3: Results of Short-Term Personal Air Sampling for Fibers (as Asbestos) [to determine compliance with Excursion Limit]

Work Area(broad)

Work Area (specific)

National Grid Yard or Staging Area Company Union

11/20/2012 112012-PG032-F07 061210915-0004 Long Island Arverne Rockaway East *Ellams, Peter National Grid CMS NAShort-term excursion sample collected in immediate proximity* of CMS crew conducting house inspections.

59 30 0.046

11/20/2012 112012-F09 061210915-0006 Long Island Arverne Rockaway East *Ellams, Peter National Grid CMS NA Short-term excursion sample collected in immediate proximity* of CMS crew conducting house inspections.

59 30 <0.046

11/20/2012 112012-FB02-AS08 061210915-0100 Long Island Arverne NA Field Blank NA NA NA NA NA NA ND

11/19/2012 111912-PG060-NM05 061210859-0005 Breezy Point/Roxbury Roxbury Roxbury Mineo, Natale National Grid Const/ Maintain Local 101

The employee aided other crew members in various gas construction tasks. The employee spent the sample period outdoors walking.



53 26 <0.051

11/19/2012 111912-P1129-FR06 061210859-0006 Breezy Point/Roxbury Roxbury Roxbury Ricci, Freddy National Grid Const/ Maintain Local 101

The employee aided other crew members in various gas construction tasks. The employee spent the sample period outdoors walking.



50 25 <0.054

11/19/2012 111912-FB01-AS07 061210859-0007 Breezy Point/Roxbury Roxbury NA Field Blank NA NA NA NA NA NA ND

11/16/2012 111612-02-JM-01M 061210823-0001 Staten Island NA Staten Island (200 Gulf Ave)

Mustari, John National Grid Construct Local 3 Main gas line purge/camera observations; Beacon & Roma Ave.

71 30 0.062

11/19/2012 111912-P1035-JP-03M 061210860-0003 Staten Island NA Staten Island (200 Gulf Ave)

Plastino, Joe National Grid Construct Local 3 Trenching; service line connections to main gas line; 248 Grimsby

71 30 <0.038

11/16/2012 111612-FB1 061210822-0006 Staten Island NA NA Field Blank NA NA NA NA NA NA ND

11/19/2012 111912-FB1M 061210860-0004 Staten Island NA NA Field Blank NA NA NA NA NA NA ND

Department

*The sample pump worn to collect the short term sample was worn by a consultant in immediate vicinity of work activity.

Date

Table 3: Results of Short-Term Personal Air Sampling for Fibers (as Asbestos) [to determine compliance with Excursion Limit] Phase Contrast Microscopy (PCM): NIOSH 7400National Grid - Hurricane Sandy Gas Restoration

November 13 - 20, 2012

Note: The field blank sample result for Asbestos was below the analytical detection limit of 5.5 Fibers/ 100 Fields.

Fiber Concentration

Reported (f/cc)Sample Number Laboratory ID

Employee Name(Last, First) General Work Activity

Sample Volume (Liters)

Sample Time (Minutes)

OSHA PEL- 30 minute Excursion Limit

1.0 f/cc

Table 3: Results of Personal Air Sampling for Respirable Particulate and Crystalline Silica

National Grid Yard or Staging Area

mg/m3 %Si02 mg/m3 %Si02 mg/m3 %Si02

11/19/2012 111912-FB02-AS11 L278791-4 Breezy Point/Roxbury Breeezy Point/Roxbury NA Field Blank NA NA NA NA NA NA NA NA NA ND NA ND NA ND

11/19/2012 111912-PG035-MC03 L278791-6 Breezy Point/Roxbury Breezy Point Breezy Point Caradona, Maurice Network Infrastructure* Construct/ NI NA




910 364 <0.055 <0.0417 <0.011 ND <0.011 ND <0.022 ND

11/19/2012 111912-PG032-DD01 L278791-5 Breezy Point/Roxbury Breezy Point Breezy Point DeMarco, Danny Network Infrastructure* Construct/ NI NA




878 351 2.5 1.828 0.052 2.1 <0.011 ND <0.023 ND

11/19/2012 111912-PG154-PM04 L278791-7 Breezy Point/Roxbury Breezy Point Breezy Point Mota, Philly Network Infrastructure* Construct/ NI NA




895 358 <0.056 <0.0418 <0.011 ND <0.011 ND <0.022 ND

11/19/2012 111912-P567-RS06 L278791-8 Breezy Point/Roxbury Breezy Point Breezy Point Stanya, Robert National Grid Construct/ NI Local 101

The employee is a National Grid supervisor and spent his day checking on crews completing various gas construction tasks. The employee spent the majority of his outdoors. Some time was also spent driving in the service vehicle.

On the day of sampling the conditions were dry and breezy, heavy coating of sand and debris present along roadways and pavements, some dust generated when vehicles pass by or when debris was removed.


842 341 0.076 0.0540 <0.012 ND <0.012 ND <0.024 ND

11/19/2012 111912-P1427-MA09 L278791-2 Breezy Point/Roxbury Roxbury Roxbury Auriemma, Matt National Grid Const/ Maintain Local 101

The employee is a senior supervisor and spent his day checking on crews completing various gas construction tasks, including meter checks, valve installation, turning off services, and preparation for a gas main purge. The employee spent the entire day outdoors and walking, at times around sandy holes.



642 256 <0.078 <0.0416 <0.016 ND <0.016 ND <0.031 ND

Table 3: Results of Personal Air Sampling for Respirable Particulate and Crystalline SilicaNIOSH 0600/NIOSH 7500

OSHA ID -142National Grid - Hurricane Sandy Gas Restoration

November 13 - 20, 2012

Date Employee Name

(Last, First)Sample Number Laboratory ID DepartmentWork Area

(broad)Work Area(specific) Company Union

Quartz Cristobalite Tridymite

Respirable Particulate Concentration

Reported (mg/m3)


(mg/m3) [as an 8-hr TWA]General Work Activity Sample Volume (Liters) Sample Time (Minutes)


11/19/2012 111912-P897-JP10 L278791-3 Breezy Point/Roxbury Roxbury Roxbury Penatello, Joe National GridConst/ Maintain (did

CMS-type work)Local 101

The employee surveyed meters outside of homes or in crawlspaces.



886 336 <0.058 <0.0406 <0.012 ND <0.012 ND <0.023 ND

11/19/2012 111912-P764-AT08 L278791-1 Breezy Point/Roxbury Roxbury Roxbury Traina, Antonino National Grid Const/ Maintain Local 101

The employee checked meters, prepped purge points in the main, turned off gas lines at the street, and aided others in various gas construction tasks. The employee spent the entire day outdoors, at times in or around sandy holes.



665 272 <0.075 <0.0425 <0.015 ND <0.015 ND <0.030 ND

11/20/2012 112012-P764-XD01 L278788-3 Breezy Point/Roxbury Roxbury Roxbury Delahoz, Xaviel National Grid Const/ Maintain Local 101

The employee checked for gas leaks in a home, monitored purge points in the main, and turned off gas lines at the street. The employee spent approximately 60 minutes indoors; the remainder of the day was spent outdoors, at times in or around sandy holes.



845 344 <0.059 <0.0423 <0.012 ND <0.012 ND <0.024 ND

11/20/2012 112012-FB01-AS04 L278788-6 Breezy Point/Roxbury Roxbury Roxbury Field Blank NA NA NA NA NA NA NA NA NA ND NA ND NA ND

11/20/2012 112012-P1427-PK03 L278788-5 Breezy Point/Roxbury Roxbury Roxbury Kechula, Pete National Grid Const/ Maintain Local 101

The employee excavated, drained, and purged a main, took pressure readings at meters, and turned off gas lines at the street. The employee spent the entire day outdoors, at times in or around sandy holes.



876 341 <0.057 <0.0405 <0.011 ND <0.011 ND <0.023 ND

11/20/2012 112012-P897-FR02 L278788-4 Breezy Point/Roxbury Roxbury Roxbury Ricci, Freddy National Grid Const/ Maintain Local 101

The employee excavated and purged a main and aided others in various gas construction tasks. The employee spent the entire day outdoors and spent the morning in sandy holes.



804 313 <0.062 <0.0404 <0.013 ND <0.013 ND <0.025 ND

11/13/2012 111312-P1516-JC01 L278674-1 Brooklyn Seagate Canarsie Caprino, John National Grid CMS Local 101

The employee inspected homes to confirm that regulators had been replaced and that the units were ready for the restoration of service. Due to the delay in the restoration of gas to the high pressure main line the employee indicated that work activity on the day of sampling was unusually slow. The employee spent approximately 30 % of his work shift performing two relights. A total of thirty minutes was spent in the basement of the homes checking the meter, checking appliances and completing the relight.


General PPE worn by the employee included work issued FR-Rated long sleeve shirt and pants, safety glasses, and safety shoes.

602 236 <0.083 <0.0408 <0.017 ND <0.017 ND <0.033 ND

11/13/2012 111312-FBD-AS08 L278674-9 Brooklyn Seagate NA Field Blank NA NA NA NA NA NA NA NA NA ND NA ND NA ND11/14/2012 111412-FB01-AS07 L278675-3 Brooklyn Seagate NA Field Blank NA NA NA NA NA NA NA NA NA ND NA ND NA ND


11/14/2012 111412-P1453-KM01 L278675-4 Brooklyn Seagate Canarsie Mooney, Kevin National Grid CMS Local 101

The employee inspected homes to confirm that regulators had been replaced and that the units were ready for the restoration of service. Due to the delay in the restoration of gas to the high pressure main line the employee indicated that work activity on the day of sampling was unusually slow. The employee spent approximately 30 % of his work shift inspecting regulators to confirm that the unit was ready for restoration of service. The rest of the shift was spent sitting in the service truck.


General PPE worn by the employee included work issued FR-Rated long sleeve shirt and pants, safety glasses, and safety shoes.

1118 440 <0.045 <0.0413 <0.0089 ND <0.0089 ND <0.018 ND

11/15/2012 111512-FB02-AS11 L278671-7 Brooklyn Sheepshead Bay NA Field Blank NA NA NA NA NA NA NA NA NA ND NA ND NA ND

11/15/2012 111512-P155-KG05 L278671-1 Brooklyn Sheepshead Bay Canarsie George, Kareem National Grid Const/Maintain Local 101

The employee checked meters, prepped purge points in the main, turned off gas lines at the street, and aided others in various gas construction tasks. The employee spent the majority of his shift outdoors. The employee also used a jackhammer for approximately 60 minutes of his shift, to break concrete pavement in search of a main valve. The employee swept up the dirt for approximately 15 minutes around the backfilled hole at the completion of his task.

On the day of sampling the conditions were dry and breezy, minimum sand and debris present along pavement.

General PPE worn by the employee included work issued FR-Rated long sleeve shirt and pants, safety glasses, high visibility vests, and safety shoes. Additional PPE worn when using a jack hammer includes hearing protection.

776 306 <0.064 <0.0408 <0.013 ND <0.013 ND <0.026 ND

11/15/2012 111512-P180-JM06 L278671-2 Brooklyn Sheepshead Bay Canarsie Mendivil, Jose National Grid Const/Maintain Local 101

The employee operated the backhoe for the duration of his shift. Time split between standing outdoors or sitting in the cab.

On the day of sampling the conditions were dry and breezy, minimum sand and debris present along pavement and roadway.


821 322 <0.061 <0.0409 <0.012 ND <0.012 ND <0.024 ND

11/16/2012 111612-P1453-FB01 L278649-1 Brooklyn Seagate Canarsie Braga, Frank National Grid CMS Local 101

The employee performed home inspections, checked for gas leaks in a home, including appliances, checked gas meter indoors, and restored gas service. The employee spent approximately 75 minutes indoors; the remainder of the day was spent outdoors or in the service truck, at times in or around debris piles.



869 342 0.063 0.045 <0.012 ND <0.012 ND <0.023 ND

11/16/2012 111612-FB02-AS10 L278788-6 Brooklyn Seagate NA Field Blank NA NA NA NA NA NA NA NA NA ND NA ND NA ND

11/16/2012 111612-P567-KW02 L278649-2 Brooklyn Seagate Canarsie Wisdom, Kirk National Grid CMS Local 101

The employee performed home inspections, checked for gas leaks in a home, including appliances, checked gas meter indoors, and restored gas service. The employee spent approximately 75 minutes indoors; the remainder of the day was spent outdoors or in the service truck, and at times in or around debris piles. The employee spent approximately 30 minutes conducting some pipe work during the repair of a leaking gas regulator.



858 345 <0.058 <0.0417 <0.012 ND <0.012 ND <0.023 ND

11/13/2012 111312-FBD-AS08 L278674-9 Long Island Long Beach West Long Beach West Field Blank NA NA NA NA NA NA NA NA NA ND NA ND NA ND


11/13/2012 111312-P1129D-JG02AM L278674-7 Long Island Long Beach West Long Beach West Gavel, John National Grid CMS Local 1027



General PPE worn by the employee included work issued FR-Rated long sleeve shirt and pants, high visibility vest, high visibility vest, safety glasses, hard hat, work gloves, and safety shoes.

341 135 <0.15 <0.0838 <0.029 ND <0.029 ND <0.059 ND

11/13/2012 111312-P1129D-JG06PM L278674-8 Long Island Long Beach West Long Beach West Gavel, John National Grid CMS Local 1027



General PPE worn by the employee included work issued FR-Rated long sleeve shirt and pants, high visibility vest, high visibility vest, safety glasses, hard hat, work gloves, and safety shoes.

361 143 <0.14 <0.0838 <0.028 ND <0.028 ND <0.059 ND

11/14/2012 111412-P1427-MF03 L278675-1 Long Island Long Beach West Long Beach West Fearon, Mike National Grid CMS Unknown




1019 401 <0.049 <0.0409 <0.0098 ND <0.0098 ND <0.020 ND

11/14/2012 111412-FB01-AS07 L278675-3 Long Island Long Beach West NA Field Blank NA NA NA NA NA NA NA NA NA ND NA ND NA ND

11/14/2012 111412-P764-WM06 L278675-2 Long Island Long Beach West Long Beach West Miles, William National Grid CMS/ GFO Unknown

The employee changed meter and relit homes until the last hour of monitoring period, when he joined a GFO crew purging a line. The employee spent the majority of the day outside, with approximately 15 minutes spent in homes.



925 371 <0.054 <0.0417 <0.011 ND <0.011 ND <0.022 ND

11/15/2012 111512-P282-SF03 L278671-5 Long Island Rockaway West Rockaway West Feaster, Scott Vectren* CMS NA

The contractor completed turn-ons and checked for gas leaks in and around homes. The contractor encountered 3 CGI's and spent approximately 200 minutes in homes, with the remainder spent outside or in the vehicle.

On the day of sampling the conditions were dry and breezy, sand and debris present along roadways, some dust generated when vehicles passed and when debris removed. One home had several inches of standing water and a moldy odor.


981 394 <0.051 <0.0419 <0.010 ND <0.010 ND <0.020 ND

11/15/2012 111512-FB02-AS11 L278671-7 Long Island Rockaway West NA Field Blank NA NA NA NA NA NA NA NA NA ND NA ND NA ND

11/15/2012 111512-P1427-DH04 L278671-6 Long Island Rockaway West Rockaway West Hagy, Dave Vectren* CMS NA

The contractor completed turn ons in homes and on the street and changed regulators. The contractor spent approximately 85% of his day in homes.

On the day of sampling the conditions were dry and breezy, sand and debris present along roadways, some dust generated when vehicles passed and when debris removed. Three homes were having demolition work done while contractor was inside, wet and filled with construction debris.


1035 408 <0.048 <0.0408 <0.0097 ND <0.0097 ND <0.019 ND


11/15/2012 111512-P897-BH02 L278671-4 Long Island Rockaway West Rockaway West Hill, Brian Vectren* CMS NA

The contractor completed turn-ons and clocked meters. The contractor spent approximately 70% of his day inside homes; the rest was spent outdoors or in the vehicle.

On the day of sampling the conditions were dry and breezy, sand and debris present along roadways, some dust generated when vehicles passed and when debris removed. One home was noticeably dusty; demolition was being conducted inside one building while contractor was inside. The fire department was hosing down the street in the contractor's vicinity.


1097 415 <0.046 <0.0398 <0.0091 ND <0.0091 ND <0.018 ND

11/16/2012 111612-P1427-WC03 L278649-4 Long Island Rockaway West Rockaway West Cort, Wilton National Grid Const/ Maintain Local 101

The employee shoveled out the gas main in the street to look for water and reported to a gas leak. The employee spent approximately 30 minutes inside one home; the rest was spent outdoors standing in or adjacent to sandy holes.


General PPE worn by the employee included work issued FR-Rated coveralls, high visibility vest, and safety shoes. Hard hat was worn improperly.

1080 425 <0.046 <0.0407 <0.0093 ND <0.0093 ND <0.019 ND

11/16/2012 111612-P764-MD02 L278649-3 Long Island Rockaway West Rockaway West Dimario, Mike National Grid Const/ Maintain Local 101

The employee tested the pressure at various meters and observed crew looking for water in the main and purging it. The employee spent approximately 70 minutes inside homes; the rest was spent outdoors standing adjacent to sandy holes.

On the day of sampling the conditions were dry and breezy, sand and debris present along roadways, some dust generated when vehicles passed and when debris removed. Dust was observed when pipe cutter was turned on in employee's vicinity.


836 342 0.068 0.0485 <0.012 ND <0.012 ND <0.024 ND

11/16/2012 111612-FB02-AS10 L278649-7 Long Island Rockaway West NA Field Blank NA NA NA NA NA NA NA NA NA ND NA ND NA ND

11/16/2012 111612-P282-AJ06 L278649-5 Long Island Rockaway West Rockaway West Jenkins, Anthony National Grid Const/ Maintain Local 101

The employee shoveled out the gas main in the street to look for water and checked the pressure. The employee spent the entire day outdoors standing in or adjacent to sandy holes.


General PPE worn by the employee included work issued FR-Rated long sleeve shirt and pants, high visibility vest, hard hat, and safety shoes.

1000 413 <0.050 <0.0430 <0.010 ND <0.010 ND <0.020 ND

11/16/2012 111612-O897-EK07 L278649-6 Long Island Rockaway West Rockaway West King, Eric National Grid Const/ Maintain Local 101

The employee jackhammered and shoveled out the gas main in the street to look for water and reported to a gas leak. The employee spent approximately 30 minutes inside one home; the rest was spent outdoors standing in or adjacent to sandy holes.



664 254 <0.075 <0.0397 <0.015 ND <0.015 ND <0.030 ND

11/20/2012 112012-P155-TD06 L278788-2 Long Island Arverne NA **Area Sample NA CMS NaRoaming area sample collected in immediate proximity of CMS crew conducting house inspections.

1011 410 <0.049 <0.0419 <0.0099 ND <0.0099 ND <0.020 ND


11/20/2012 112012-P567-TB01 L278788-1 Long Island Arverne Rockaway East Botehlo, Tom National Grid CMS NA




1021 408 0.13 0.1105 <0.0098 ND <0.0098 ND <0.020 ND

11/20/2012 112012-FB01-AS04 L278788-6 Long Island Arverne NA Field Blank NA NA NA NA NA NA NA NA NA ND NA ND NA ND11/13/2012 111312-FB1 L278674-6 Staten Island NA NA Field Blank NA NA NA NA NA NA NA NA NA ND NA ND NA ND

11/13/2012 111312-P980-EM-01 L278674-3 Staten Island NA Staten Island (200 Gulf Ave)

McIntyre, Evan National Grid CMS Local 3




173 69 <0.28 <0.147 <0.056 ND <0.056 ND <0.11 ND






480 192 0.17 <0.147 <0.021 ND <0.021 ND <0.042 ND






423 169 <0.11 <0.147 <0.023 ND <0.023 ND <0.046 ND

11/14/2012 111412-P1441-GB-01C L278798-3 Staten Island NA Staten Island (200 Gulf Ave)

Battcock, Gregory National Grid Construct Local 3

Main gas line repairs at Cedar Grove Avenue/near New Dorp Ave. Work involved identifying areas for asphalt cuts using a jack hammer and excavator to remove road surface and subsurface soils to gain access to main/service lines below grade.

A great deal of traffic in area for debris pile cleanup and removals as well as street cleaning equipment in proximity to work performed. Weather was dry and cool.


308 164 <0.16 <0.0547 <0.032 ND <0.032 ND <0.065 ND

11/14/2012 111412-FB1 L278798-2 Staten Island NA NA Field Blank NA NA NA NA NA NA NA NA NA ND NA ND NA ND

11/14/2012 111412-P462-SM-02C L278798-4 Staten Island NA Staten Island (200 Gulf Ave)

Mahoney, Sean National Grid Construct Local 3

Service line repairs at Cedar Grove Avenue/near New Dorp Ave. Work involved identifying areas for asphalt cuts using a jack hammer and excavator to remove road surface and subsurface soils to gain access to main/service lines below grade.



359 191 <0.14 <0.0557 <0.028 ND <0.028 ND <0.056 ND

11/15/2012 111512-FB1 L278798-6 Staten Island NA NA Field Blank NA NA NA NA NA NA NA NA NA ND NA ND NA ND

11/15/2012 111512-P980-RR-01 L278798-5 Staten Island NA Staten Island (200 Gulf Ave)

Riginio, Robert National Grid CMS Local 3

Home safety inspections near Oceanic/Cuba Avenues.


960 405 <0.052 <0.0439 <0.010 ND <0.010 ND <0.021 ND

11/19/2012 111912-FB02-AS11 L278791-4 Staten Island NA NA Field Blank NA NA NA NA NA NA NA NA NA ND NA ND NA ND


11/19/2012 111912-P462-MR-02M L278791-10 Staten Island NA Staten Island (200 Gulf Ave)

Ruggiero, Michael National Grid Construct Local 3

Main and service line work at Beacon & Roma Ave. Work involved gaining access to main/service lines below grade.



761 321 0.068 0.045475 <0.014 ND <0.014 ND <0.027 ND

11/19/2012 111912-05-AS-01M L278791-9 Staten Island NA Staten Island (200 Gulf Ave)

Saba, Anthony National Grid Construct Local 3

Main and service line work at Beacon & Roma Ave. Work involved gaining access to main/service lines below grade.



453 191 <0.11 <0.0438 <0.022 ND <0.022 ND <0.044 ND

Analyte


Crystalline Silica

* In the absence of available National Grid employees personal air sampling was conducted on contractors performing work task similar to that of a National Grid employee.

Note: The field blank sample results were less than their analytical detection limits: 50 µg for Respirable Particulate and 10 µg, 10 µg, and 20 µg for Quartz, Cristobalite, and Tridymite, respectively.

OSHA PEL - 8 hour TWA unless otherwise indicated

5 mg/m3

Quartz: 10 mg/m3 / %SiO2 +2

Cristobalite: 1/2 the Quartz PEL

Tridymite: 1/2 the Quartz PEL

**Please note that area samples are used to screen a location or estimate a potential worst case scenario exposure event, are typically not directly comparable to personal samples expressed as an eight-hour Time Weighted Average (8-hour TWA), and should not be used to show compliance with the OSHA PELs.

Table 5: Real-Time, Direct-Read Respirable Dust Measurements

11/12/2012 Long Island Arverne NACMS crew members inspected a regulator on the exterior of the home, foot traffic.

0.040 - 0.060

11/12/2012 Long Island Arverne NACMS crew members inspected a regulator on the exterior of the home, a sanitation truck removed debris approximately 12 feet away.

0.024 - 0.028

11/12/2012 Long Island Arverne 1

Roadside at Rockaway West staging area near Riis Park, high vehicle traffic including trucks hauling debris, street visibly sandy, debris pile visible in distance.

0.017 - 0.031

11/12/2012 Long Island Arverne NARoadside at corner of 144th and Rockaway Beach Blvd., accumulation of sand and debris on street, heavy traffic.

0.032 - 0.264

11/13/2012 Long Island Arverne NA

CMS crew members checking for gas or carbon monoxide around perimeter of home and completing paperwork, piles of wet debris on street.

0.006 - 0.008

11/13/2012 Long Island Long Beach West 2CMS crew members clocking meter in basement of home, thick layer of wet dirt visible on floor, standing water in some areas, salty odor.

0.021 - 0.030

11/14/2012 Long Island Long Beach West 3CMS crew members changing meter in basement of home, door open to sandy debris-filled street, breezy and dry.

0.044 - 0.079

11/14/2012 Long Island Long Beach West NACMS crew members checking for gas leaks on street when odor detected, sandy debris-filled street, breezy and dry.

0.002 - 0.012

11/14/2012 Long Island Long Beach West NACMS crew members join GFO crew to flush water out of line on street, large sandy hole, splashing water, breezy and moist.

0.015 - 0.068

11/15/2012 Long Island Rockaway West NA

CMS crew members changing meter outside of home, approximately 15 m.p.h. wind, road moderately sandy, medium to high vehicle traffic.

0.035 - 1.510

11/15/2012 Long Island Rockaway West NACMS crew member shutting off line at street, front loader moving debris approximately 20 feet away.

0.030 - 0.095

11/15/2012 Long Island Rockaway West 4 CMS crew member clocking meter in dirty wet basement.

0.046 - 0.149

11/16/2012 Long Island Rockaway West 5 Const./Maintain crew members standing in or around sandy hole, jackhammering in vicinity.

0.019 - 0.084

11/13/2012 Brooklyn Seagate NACMS crew performing inspections in basement of building to confirm that service can be restored. Heavy drizzle. 0.012-0.021

11/13/2012 Brooklyn Seagate 6CMS crew walked along side of wet debris pile to perform home inspections. 0.006-0.018

11/14/2012 Brooklyn Seagate 7CMS crew members along Roadside at Beach 40th Street , high vehicle traffic including trucks hauling debris, heavy coating of sand, debris pile visible in distance. 0.331-0.392

11/14/2012 Brooklyn Seagate NAHomeowners engage in clean up activiites, CMS crew members enter home approximately 12 feet away. 0.067-0.102

11/15/2012 Brooklyn Sheepshead Bay NA Construct/Maintain crew members utilizing dig-it to gain access to service line, slight breeze. 0.001-0.004

General Work Activity/ Observations

Instantaneous Respirable Particulate

Concentration (mg/m3)

Table 5: Real-Time, Direct-Read Respirable Dust Measurements Aerosol Dust Monitor (TSI DustTrak)

National Grid - Hurricane Sandy Gas RestorationNovember 13 - 20, 2012

Date Location(broad) Photolog #

Location(specific)

Table 5: Real-Time, Direct-Read Respirable Dust Measurements

11/15/2012 Brooklyn Sheepshead Bay 8 Construct/Maintain crew members use shovel to remove sand from hole to gain access to service line. Some dirt and debris present. 0.005 - 0.011

11/15/2012 Brooklyn Sheepshead Bay 9Construct/Maintain crew members walking along roadway to check condition of regulators at condenmend homes prior to shut off. Little wind present in along the alleyways. 0.001- 0.003

11/16/2012 Brooklyn Seagate 10 CMS crew members repair leak on exterior of home, replace pipe on exterior of home approximately 20 feet from roadway. 0.022-0.056

11/16/2012 Brooklyn Seagate NA CMS crew member enter basement to check meter during home inspections, wet sand and debris observed in basement. 0.001 -0.003

11/19/2012 Breezy Point/Roxbury Breezy Point NA Contractors performing CMS type work disconnect and cap off gas lines at condenmed homes. Heavy coating of sand along roadways. 0.032-0.145

11/13/2012 Staten Island Gulf Avenue NAInitial monitoring of office location; undergoing drywall replacement.

0.000

11/13/2012 Staten Island Hunter Avenue NA Crew members performed house pipe test, boiler and gas stove checks.

0.001

11/13/2012 Staten Island Hunter Avenue 11 Regulator changes/bucket loaders and dump truck activity

0.001

11/13/2012 Staten Island Mapleton Avenue 12, 13Active installation of fiberglass batting adjacent to crews performing regulator/meter change-out.

0.007- 0.038

11/14/2012 Staten Island Gulf Avenue NA Initial monitoring of office location; undergoing drywall replacement and partition finish work.

0.016- 0.27

11/15/2012 Staten Island Beacon & Roma Avenue Intersection

14, 15 Debris pile at intersection of Beacon & Roma; windy conditions.

0.000- 0.18

11/16/2012 Staten Island Beacon & Roma Avenue Intersection

NA Construct crew members manipulating plastic tubing, street sweeper activity.

0.010-0.166

11/16/2012 Staten Island Ina Street & Cuba Avenue Intersection

NA Cuba Avenue being used as a side street cut-through from Hylan Blvd for traffic movement.

0.001- 0.047

*Please note that area samples are used to screen a location or estimate a potential worst case scenario exposure event, are typically not directly comparable to personal samples expressed as an eight-hour Time Weighted Average (8-hour TWA), and should not be used to show compliance with the OSHA PELs

Appendix A:

Analytical Laboratory Reports – Fibers (as Asbestos) Phase Contrast

Microscopy

Test Report: Fiber Analysis of Air Samples via NIOSH 7400, Revision 3, Issue 2, 8/15/94 (with 8 Hour Time Weighted Average)

EMSL Analytical, Inc.528 Mineola Avenue, Carle Place, NY 11514Phone/Fax: (516) 997-7251 / (516) 997-7528http://www.emsl.com [email protected]

061210603CustomerID: EICM25CustomerPO:ProjectID:

EMSL Order:

Attn: Corey BriggsENVIRON International Corp20 Custom House StreetSuite 800Boston, MA 02110

Received: 11/13/12 8:30 PM

08-29448B National Grid

Fax: (617) 946-3229Phone: (617) 946-6100

Project:

11/13/2012Analysis Date:11/13/2012Collected:

Sample Volume(liters)

Fibers/mm²Fibers

LOD(fib/cc)Activity FieldsSample Start Date

Fibers/ccSample End Date

Rate (l/min)

Other Samples

111312-FB-Bl

061210603-0002

<7.0Field Blank 1.

11/13/2012Field Blank <5.5 10011/13/2012


Fibers/mm²Fibers



Rate (l/min)

Samples for Frank Cinque

111312-PG-169-FC01

061210603-0001

430.00 9.550.006

Included in TWA.

11/13/2012 1:00 AMPersonal Air Sample Utility work

7.5 100 0.00911/13/2012 4:56 AM 1.8220

Summary for Frank Cinque on 11/13/2012 0.0048 Hour Time-Weighted Average: Fibers/cc

Michelle McGowan, Laboratory Manageror other approved signatory

Test Report PCM/OSHA-7.25.0 Printed: 11/13/2012 10:45:44 PM 1

No discernable field blank sample(s) submitted with this sample set.

Analyst(s)

THIS IS THE LAST PAGE OF THE REPORT.

In no event shall EMSL be liable for indirect, special, consequential, or incidental damages, including, but not limited to, damages for loss of profit or goodwill regardless of the negligence (either sole or concurrent) of EMSL and whether EMSL has been informed of the possibility of such damages, arising out of or in connection with EMSL’s services thereunder or the delivery, use, reliance upon or interpretation of test results by client or any third party. We accept no legal responsibility for the purposes for which the client uses the test results. In no event shall EMSL be liable to a client or any third party, whether based upon theories of tort, contract or any other legal or equitable theory, in excess of the amount paid to EMSL by client thereunder. The test results meets all NELAC requirements unless otherwise specified. Accreditations: NRSB ARL6006, NJ DEP 03036, MEB 92525, PA 2573, IN 00455, IA L00032, RI RAS-024, ME 20200C, NE RMB-1083, NY ELAP 10872, NM 885-10L, FL RB2034, OH RL-39, NRPP #106178AL, KS-LB-0005 Samples analyzed by EMSL Analytical, Inc. Carle Place, NY NYS ELAP 11469

Keith McWilliams (2)

Initial report from 11/13/2012 22:45:44

http://www.emsl.com

mailto:[email protected]




EMSL Order:


Received: 11/13/12 9:39 PM

National Grid/089448B

Fax: (617) 946-3229Phone: (617) 946-6100

Project:



Fibers/mm²Fibers



Rate (l/min)

Other Samples

Field Blank

061210604-0004

<7.0Field Blank.

Field Blank FB1 <5.5 10011/13/2012


Fibers/mm²Fibers



Rate (l/min)

Samples for James Trezzino

111312-04-JT-01

061210604-0001

162.00 19.10.017Included in TWA.

11/13/2012 1:00 AMPersonal Air Sample James Trezzino

15.0 100 0.04511/13/2012 2:21 AM 2

111312-04-JT-02

061210604-0002

394.00 <7.00.007Included in TWA.


<5.5 100 <0.00711/13/2012 4:17 AM 2

111312-04-JT-03

061210604-0003

368.00 26.80.007Included in TWA.


21.0 100 0.02811/13/2012 4:04 AM 2

Summary for James Trezzino on 11/13/2012 0.0218 Hour Time-Weighted Average: Fibers/cc<



Analyst(s)





http://www.emsl.com





EMSL Order:


Received: 11/13/12 10:50 PM

0829448B

Fax: (617) 946-3229Phone: (617) 946-6100

Project:



Fibers/mm²Fibers



Rate (l/min)

Samples for John Gavel

111312 PGOGOA JGO3AM

061210606-0001

267.00 17.20.010

Included in TWA.

11/13/2012 1:00 AMPersonal Air Sample John Gavel

13.5 100 0.02511/13/2012 3:09 AM 2.0698

111312 PGOGOA J605PM

061210606-0002

110.00 26.80.024

Included in TWA.

11/13/2012 1:00 AMPersonal air Sample John Gavel

21.0 100 0.09411/13/2012 1:53 AM 2.0755

Summary for John Gavel on 11/13/2012 0.0178 Hour Time-Weighted Average: Fibers/cc



No discernable field blank sample(s) submitted with this sample set.

Analyst(s)





http://www.emsl.com





EMSL Order:


Received: 11/13/12 8:30 PM

082944813

Fax: (617) 946-3229Phone: (617) 946-6100

Project:



Fibers/mm²Fibers



Rate (l/min)

Other Samples

111312 FBA A507

061210607-0003

<7.0Field Blank.

11/13/2012Field Blank <5.5 10011/13/2012


Fibers/mm²Fibers



Rate (l/min)

Samples for Chris Canine

111312 PG327 CC01AM

061210607-0001

244.00 11.50.011

Included in TWA.

11/13/2012 1:00 AMPersonal Air Sample Chris Canine

9.0 100 0.01811/13/2012 3:00 AM 2.0333

11112 PG327A CC04PM

061210607-0002

338.00 20.40.008

Included in TWA.

11/13/2012 1:00 AMPersonal Air Sample Chris Canine

16.0 100 0.02311/13/2012 3:46 AM 2.0361

Summary for Chris Canine on 11/13/2012 0.0128 Hour Time-Weighted Average: Fibers/cc



Analyst(s)





http://www.emsl.com


SampleVolume(liters)

Fibers/mm²Fibers

LOD(fib/cc) NotesLocation FieldsSample Date

Fibers/cc

Test Report: Fiber Count by Phase Contrast Microscopy (PCM), NIOSH 7400 Method, Revision 3, Issue 2, 8/15/94



Received: 11/15/12 5:43 AM

0829448B

Fax: (617) 946-3229Phone: (617) 946-6100

Project:



EMSL Order:

111412-PG300

061210663-0001

832.00 35.711/14/2012Personal sample-Jim Laponte

28 100 0.0170.003

111412-PG027

061210663-0002

809.00 41.411/14/2012Personal sample-Mike Fearon

32.5 100 0.0200.003

111412-PG060

061210663-0003

712.00 67.511/14/2012Personal sample-William Miles

53 100 0.0360.004

111412-PG327

061210663-0004

705.00 38.911/14/2012Personal sample-Cecil Manning

30.5 100 0.0210.004

111412-FB02-A

061210663-0005

<7.0 Field Blank11/14/2012Field Blank <5.5 100

111412-PG107-FB02061210663-0006

850.00 19.711/14/2012Personal sample-Frank Braga

15.5 100 0.0090.003

The results reported have been blank corrected as applicable.


Test Report PCM-7.22.0 Printed: 11/15/2012 9:16:34 AM 1

Analyst(s)


Limit of detection is 7 fibers/mm². Intra-laboratory Sr values: 5-20 fibers = 0.31, 21-50 fibers = 0.23, 51-100 fibers = 0.17. Inter-laboratory Sr values (Average of EMSL round robin data) = 0.29. EMSL maintains liability limited to cost of analysis. This report relates only to the samples reported above and may not be reproduced, except in full, without written approval by EMSL. EMSL bears no responsibility for sample collection activities or analytical method limitations. Interpretation and use of test results are the responsibility of the client. EMSL is not responsible for data reported in fibers/cc, which is dependent on volume collected by non-laboratory personnel. Results have been blank corrected as applicable. The results in this report meet all requirements of the NELAC standards unless otherwise noted. Samples received in good condition unless otherwise noted.Samples analyzed by EMSL Analytical, Inc. Carle Place, NY AIHA-LAP, LLC--IHLAP Accredited #102344, CT PH-0249, NYS ELAP 11469, MA AA000200, LELAP 04144

Daniel Clarke (6)


http://www.emsl.com



Fibers/mm²Fibers


Fibers/cc




Received: 11/16/12 2:14 AM

National Grid/ 0829448B

Fax: (617) 946-3229Phone: (617) 946-6100

Project:



EMSL Order:

111412-04/02-AD-01C061210719-0001

331.00 34.411/14/2012Personal air sample- Anthony Desposito

27 100 0.0400.008

FB1C

061210719-0002

<7.0 Field Blank11/14/2012 <5.5 100



Test Report PCM-7.22.0 Printed: 11/16/2012 12:01:30 PM 1

Analyst(s)



Zlatan Dimitrijevic (2)


http://www.emsl.com



Fibers/mm²Fibers


Fibers/cc




Received: 11/16/12 2:13 AM


Fax: (617) 946-3229Phone: (617) 946-6100

Project:



EMSL Order:

111412-03-JO-01

061210720-0001

481.00 67.511/14/2012Personal air sample- Jerry O'Mallen

53 100 0.0540.006

111412-03-JO-02

061210720-0002

585.00 45.911/14/2012Personal air sample- Jerry O'Mallen

36 100 0.0300.005

FB1

061210720-0003

<7.0 Field Blank11/14/2012Field blank <5.5 100




Analyst(s)





http://www.emsl.com





EMSL Order:


Received: 11/15/12 8:47 PM

08-9448B

Fax: (617) 946-3229Phone: (617) 946-6100

Project:



Fibers/mm²Fibers



Rate (l/min)

Other Samples

111512 FB01 AS10

061210714-0011

<7.0

Field Blank.

11/15/2012Field Blank <5.5 10011/15/2012


Fibers/mm²Fibers



Rate (l/min)

Samples for Chris Lemming

111512 PG027 Cl08

061210714-0009

638.00 650.004

Included in TWA.

11/15/2012 1:00 AMPersonal Air Sample Chris Lemming

51.0 100 0.03911/15/2012 6:19 AM 2

Summary for Chris Lemming on 11/15/2012 0.0268 Hour Time-Weighted Average: Fibers/cc


Fibers/mm²Fibers



Rate (l/min)

Samples for Dan Rager

111512 P1129 DR07

061210714-0008

716.00 46.50.004

Included in TWA.

11/15/2012 1:00 AMPersonal Air Sample Dan Rager

36.5 100 0.02511/15/2012 6:56 AM 2.0112

Summary for Dan Rager on 11/15/2012 0.0198 Hour Time-Weighted Average: Fibers/cc



Analyst(s)


Ryan DeLand (11)


http://www.emsl.com





EMSL Order:


Received: 11/15/12 8:47 PM

08-9448B

Fax: (617) 946-3229Phone: (617) 946-6100

Project:



Fibers/mm²Fibers



Rate (l/min)

Samples for Dave Hagy

111512 PG060 DH05

061210714-0006

800.00 76.40.003

Included in TWA.

11/15/2012 1:00 AMPersonal Air Sample Dave Hagy

60.0 100 0.03711/15/2012 7:47 AM 1.9656

Summary for Dave Hagy on 11/15/2012 0.0318 Hour Time-Weighted Average: Fibers/cc


Fibers/mm²Fibers



Rate (l/min)

Samples for Greg Steelsmith

111512 PG300 G509

061210714-0010

650.00 30.60.004

Included in TWA.

11/15/2012 1:00 AMPersonal Air Sample Greg Steelsmith

24.0 100 0.01811/15/2012 6:26 AM 1.9939

Summary for Greg Steelsmith on 11/15/2012 0.0128 Hour Time-Weighted Average: Fibers/cc


Fibers/mm²Fibers



Rate (l/min)

Samples for John Beard

111512 PG107 JB01

061210714-0005

815.00 58.60.003

Included in TWA.

11/15/2012 1:00 AMPersonal Air Sample John Beard

46.0 100 0.02811/15/2012 7:46 AM 2.0074

Summary for John Beard on 11/15/2012 0.0248 Hour Time-Weighted Average: Fibers/cc



Analyst(s)


Ryan DeLand (11)


http://www.emsl.com





EMSL Order:


Received: 11/15/12 8:47 PM

08-9448B

Fax: (617) 946-3229Phone: (617) 946-6100

Project:



Fibers/mm²Fibers



Rate (l/min)

Samples for Kareen George

111512-PG169-KG01

061210714-0001

595.00 40.10.005

Included in TWA.

11/15/2012 1:00 AMPersonal Air Sample Kareem George

31.5 100 0.02611/15/2012 6:08 AM 1.9318

Summary for Kareen George on 11/15/2012 0.0178 Hour Time-Weighted Average: Fibers/cc


Fibers/mm²Fibers



Rate (l/min)

Samples for Randy Hottinger

111512 PG327 RH06

061210714-0007

726.00 93.60.004

Included in TWA.

11/15/2012 1:00 AMPersonal Air Sample Randy Hottinger

73.5 100 0.05011/15/2012 7:02 AM 2.0055

Summary for Randy Hottinger on 11/15/2012 0.0388 Hour Time-Weighted Average: Fibers/cc


Fibers/mm²Fibers



Rate (l/min)

Samples for Robert Covucci

111512 PG035 RC03

061210714-0003

438.00 210.006

Included in TWA.

11/15/2012 1:00 AMPersonal Air Sample Robert Covucci

16.5 100 0.01811/15/2012 4:39 AM 2

Summary for Robert Covucci on 11/15/2012 0.0088 Hour Time-Weighted Average: Fibers/cc



Analyst(s)


Ryan DeLand (11)


http://www.emsl.com





EMSL Order:


Received: 11/15/12 8:47 PM

08-9448B

Fax: (617) 946-3229Phone: (617) 946-6100

Project:



Fibers/mm²Fibers



Rate (l/min)

Samples for Sean Price

111512 PG154 SP04

061210714-0004

609.00 17.80.004

Included in TWA.

11/15/2012 1:00 AMPersonal Air Sample Sean Price

14.0 100 0.01111/15/2012 6:08 AM 1.9773

Summary for Sean Price on 11/15/2012 0.0078 Hour Time-Weighted Average: Fibers/cc


Fibers/mm²Fibers



Rate (l/min)

Samples for Steve Sipp

111512-PG-032-SS02

061210714-0002

668.00 89.80.004

Included in TWA.

11/15/2012 1:00 AMPersonal Air Sample Steve Sipp

70.5 100 0.05211/15/2012 6:40 AM 1.9647

Summary for Steve Sipp on 11/15/2012 0.0378 Hour Time-Weighted Average: Fibers/cc



Analyst(s)



Ryan DeLand (11)


http://www.emsl.com



Fibers/mm²Fibers


Fibers/cc




Received: 11/16/12 2:32 AM


Fax: (617) 946-3229Phone: (617) 946-6100

Project:



EMSL Order:

111512-04-PA-01

061210717-0001

498.00 2811/15/2012Personal air sample- Peter Abdo

22 100 0.0220.005

111512-02-DT-02

061210717-0002

831.00 70.111/15/2012Personal air sample- Dominick

55 100 0.0320.003

111512-03-AC-03

061210717-0003

549.00 22.911/15/2012Personal air sample- Adam Christiansen

18 100 0.0160.005

111512-04-PA-04

061210717-0004

222.00 19.711/15/2012Personal air sample- Peter Abdo

15.5 100 0.0340.012

111512-05-RC-05061210717-0005

314.00 15.311/15/2012Personal air sample- Ray Campbell

12 100 0.0190.009

111512-FB1

061210717-0006





Analyst(s)





http://www.emsl.com


SampleVolume

(liters)Fibers/mm²Fibers


Fibers/cc




Received: 11/16/12 2:14 AM


Fax: (617) 946-3229Phone: (617) 946-6100

Project:



EMSL Order:

111512-P676-01A

061210726-0001

858.00 7.6411/15/2012Area sample-Low vol pump 6 100 0.0030.003

111512-P980-02A

061210726-0002

858.00 7.6411/15/2012Area sample-Low vol pump 6 100 0.0030.003

111512-FB1A

061210726-0003





Analyst(s)





http://www.emsl.com



Fibers/mm²Fibers


Fibers/cc




Received: 11/16/12 2:14 AM


Fax: (617) 946-3229Phone: (617) 946-6100

Project:



EMSL Order:

111512-P462-DA-01C061210718-0001

313.00 33.111/15/2012Personal air sample- Dominick Agnone

26 100 0.0410.009

111512-FB1C

061210718-0002





Analyst(s)





http://www.emsl.com



Fibers/mm²Fibers


Fibers/cc




Received: 11/17/12 9:27 AM

08-29448B

Fax: (617) 946-3229Phone: (617) 946-6100

Project:



EMSL Order:

111612-PG035-KM01061210800-0001

666.00 58.611/16/2012Personal Air Sample-Kevin Mooney

46 100 0.0340.004

111612-PG154-JC02061210800-0002

676.00 36.911/16/2012Personal Air Sample-John Caprino

29 100 0.0210.004

111612-PG032-RT03061210800-0003

640.00 28.711/16/2012Personal Air Sample-Richie Tancreto

22.5 100 0.0170.004

111612-PG169-JR04061210800-0004

671.00 31.211/16/2012Personal Air Sample-Julio Rodriguez

24.5 100 0.0180.004

111612-PG027-MD01061210800-0005

665.00 40.811/16/2012Personal Air Sample-Mike Dimario

32 100 0.0240.004

111612-PG107-WC04061210800-0006

863.00 45.211/16/2012Personal Air Sample-Wilton Cort

35.5 100 0.0200.003

111612-PG327-AJ05061210800-0007

869.00 68.811/16/2012Personal Air Sample-Anthony Jenkins

54 100 0.0300.003

111612-PG060-EK08061210800-0008

827.00 29.911/16/2012Personal Air Sample-Eric King

23.5 100 0.0140.003



Analyst(s)


Patricia Wood (9)


http://www.emsl.com



Fibers/mm²Fibers


Fibers/cc




Received: 11/17/12 9:27 AM

08-29448B

Fax: (617) 946-3229Phone: (617) 946-6100

Project:



EMSL Order:

111612-FB01-AS09061210800-0009





Analyst(s)



Patricia Wood (9)


http://www.emsl.com


SampleVolume



Fibers/cc




Received: 11/18/12 3:18 PM

National Grid 082944B

Fax: (617) 946-3229Phone: (617) 946-6100

Project:



EMSL Order:

11612-P980-RF-01

061210822-0001

667.00 30.611/18/2012Personal Air Sample Rick Farquhar

24 100 0.0180.004

11612-P1035-PA-02

061210822-0002

182.00 <7.0111/18/2012Personal Air Sample Peter Abdo

<5.5 100 <0.0150.015

11612-P676-JK-03

061210822-0003

662.00 26.811/18/2012Personal Air Sample Joseph Kearney

21 100 0.0160.004

11612-P462-AP-04

061210822-0004

669.00 30.611/18/2012Personal Air Sample Andrew Pinto

24 100 0.0180.004

11612-P1035-PA-05

061210822-0005

551.00 26.811/18/2012Personal Air Sample Peter Abdo

21 100 0.0190.005

11612-FB1

061210822-0006





Analyst(s)





http://www.emsl.com


SampleVolume



Fibers/cc




Received: 11/18/12 3:18 PM


Fax: (617) 946-3229Phone: (617) 946-6100

Project:



EMSL Order:

111612-02-JM-01M

061210823-0001

71.00 11.511/18/2012STEL John Mustari 9 100 0.0620.038

111612-FB-1M

061210823-0002





Analyst(s)





http://www.emsl.com



Fibers/mm²Fibers


Fibers/cc




Received: 11/19/12 8:23 PM

20 Custom House Street, Suite 800, Boston, MA, 02110, Proj. # 08-29448b

Fax: (617) 946-3229Phone: (617) 946-6100

Project:



EMSL Order:

111912-PG027-AT01061210859-0001

592.00 22.911/19/2012 - Antonino Traina 18 100 0.0150.005

111912-PG327-MA02061210859-0002

518.00 19.711/19/2012 - Matt Auriemma 15.5 100 0.0150.005

111912-PG300-JP03061210859-0003

675.00 26.811/19/2012 - Joe Penatello 21 100 0.0150.004

111912-PG107-NL04061210859-0004

461.00 22.311/19/2012 - Nunzio Lagana 17.5 100 0.0190.006

111912-PG060-NM05061210859-0005

53.00 <7.0111/19/2012 - Natale Mineo STEL <5.5 100 <0.0510.051

111912-P1129-FR06061210859-0006

50.00 <7.0111/19/2012 - Freddy Ricci STEL <5.5 100 <0.0540.054

111912-FB01-AS07061210859-0007

<7.01 Field Blank11/19/2012 - Field Blank <5.5 100

111912-P180-MS02061210859-0008

738.00 30.611/19/2012 - Personal Air Sample - Mike Stanley

24 100 0.0160.004



Analyst(s)


Ryan DeLand (9)


http://www.emsl.com



Fibers/mm²Fibers


Fibers/cc




Received: 11/19/12 8:23 PM


Fax: (617) 946-3229Phone: (617) 946-6100

Project:



EMSL Order:

111912-P1453-JH05061210859-0009

910.00 80.911/19/2012 - Personal Air Sample - Jimmy Hellberg

63.5 100 0.0340.003




Analyst(s)



Ryan DeLand (9)


http://www.emsl.com



Fibers/mm²Fibers


Fibers/cc




Received: 11/19/12 8:23 PM


Fax: (617) 946-3229Phone: (617) 946-6100

Project:



EMSL Order:

111912-P1635-TV-01M061210860-0001

453.00 80.311/19/2012 - Personal Air Sample - Tommy Vollaro - Sample Time: 191 Min.

63 100 0.0680.006

111912-P676-JP-02M061210860-0002

732.00 47.811/19/2012 - Personal Air Sample - Joe Plastino - Sample Time: 309 Min.

37.5 100 0.0250.004

111912-P1035-JP-03M061210860-0003

71.00 <7.011/19/2012 - Personal Air Sample - Joe Plastino - Sample Time: 30 Min.

<5.5 100 <0.0380.038

111912-FB1M

061210860-0004

<7.0 Field Blank11/19/2012 - Field Blank <5.5 100




Analyst(s)



Ryan DeLand (4)


http://www.emsl.com


SampleVolume



Fibers/cc




Received: 11/21/12 6:30 AM

Project # 08-29448b

Fax: (617) 946-3229Phone: (617) 946-6100

Project:



EMSL Order:

112012-PG154-F02

061210915-0001

804.00 40.811/20/2012Personal Air - Ken Espinosa 32 100 0.0200.003

112012-PG035-TEM04

061210915-0002

924.00 84.111/20/2012Personal Air - Dan Astle 66 100 0.0350.003

112012-P1453-TEM05

061210915-0003

1414.00 21.011/20/2012Personal Air Sample Arvene

16.5 100 0.0060.002

112012-PG032-F07

061210915-0004

59.00 7.0111/20/2012STEL - Peter Ellans 5.5 100 0.0460.046

112012-F08

061210915-0005

502.00 26.811/20/2012Personal Air - George Nunez

21 100 0.0210.005

112012-F09

061210915-0006

59.00 <7.0111/20/2012STEL - Peter Ellans <5.5 100 <0.0460.046

112012-PG027-KF05061210915-0007

645.00 19.711/20/2012Personal Air - Ken Fraser 15.5 100 0.0120.004

112012-PG300-SD06

061210915-0008

675.00 14.611/20/2012Personal Air - Sal Digiovanna

11.5 100 0.0080.004



Analyst(s)


Jason Rubin (10)


http://www.emsl.com


SampleVolume



Fibers/cc




Received: 11/21/12 6:30 AM

Project # 08-29448b

Fax: (617) 946-3229Phone: (617) 946-6100

Project:



EMSL Order:

112012-PG060-MG07

061210915-0009

647.00 26.111/20/2012Personal Air - Matt Gregory 20.5 100 0.0160.004

112012-FB02-AS08

061210915-0010





Analyst(s)



Jason Rubin (10)


http://www.emsl.com


SampleVolume



Fibers/cc




Received: 11/21/12 6:43 AM

Project # 08-29448b

Fax: (617) 946-3229Phone: (617) 946-6100

Project:



EMSL Order:

112012-SKT-JC-01C

061210916-0001

744.00 25.511/20/2012Personal air sample - Johnny Cadle

20 100 0.0130.004

112012-P1441-JL-02C

061210916-0002

789.00 19.711/20/2012Personal air sample - Jack Lioce

15.5 100 0.0100.003

112012-P462-01A

061210916-0003

704.00 8.9211/20/2012Static area sample - adj. NGI & R crew

7 100 0.0050.004

112012-P980-02A

061210916-0004

1211.00 29.911/20/2012Roaming area sample on CJ 23.5 100 0.0100.002

112012-FB1C

061210916-0005





Analyst(s)



Jason Rubin (5)


http://www.emsl.com


SampleVolume

(liters)Fibers/

mm²FibersLOD

(fib/cc) NotesLocation FieldsSample DateFibers/

cc




Received: 11/21/12 6:43 AM

Project # 08-29448b

Fax: (617) 946-3229Phone: (617) 946-6100

Project:



EMSL Order:

112012-SKT-JC-01C061210916-0001

744.00 25.511/20/2012Personal air sample - Johnny Cadle

20 100 0.0130.004

112012-P1441-JL-02C061210916-0002

789.00 19.711/20/2012Personal air sample - Jack Lioce

15.5 100 0.0100.003

112012-P462-01A061210916-0003

704.00 8.9211/20/2012Static area sample - adj. NGI & R crew

7 100 0.0050.004

112012-P980-02A061210916-0004

1211.00 29.911/20/2012Roaming area sample on CJ

23.5 100 0.0100.002

112012-FB1C

061210916-0005





Analyst(s)



Jason Rubin (5)


http://www.emsl.com


Appendix A:

Analytical Laboratory Reports – Fibers (as Asbestos) Transmission Electron

Microscopy

SampleAsbestosType(s)

AsbestosFibers Notes

7402 Adjusted(TEM)F/cc

Volume(Liters)

Asbestos% of total

NonAsbestosFibers

PCM F/cc

Test Report: Asbestos Analysis of Air Samples by Transmission Electron Microscopy via NIOSH Method 7402


Received: 11/13/12 8:30 PM

082944813

Fax: (617) 946-3229Phone: (617) 946-6100

Project:




EMSL Order:

11112 PG327A CC04PM061210607-0002

14 00.023 <0.008338

Average number of asbestos fibers on field blanks: n/aAverage number of non-asbestos fibers on field blanks: n/a

NIOSH 7402 method only reports fibers > 5µm in length and > 0.25µm in width. This method requires 2 field blank analyses per set. Since no blanks were analyzed, the results are not blank corrected.


Analyst(s)

Test Report TEM7402-7.26.0 Printed: 11/26/2012 1:40:18 PM 1THIS IS THE LAST PAGE OF THE REPORT.

EMSL is not responsible for data reported in fibers/cc, which is dependent on volume collected by non-laboratory personnel. The above report relates only to the items tested. This report may not be reproduced, except in full, without written approval by EMSL Analytical, Inc. The test results contained within this report meet the requirements of NELAC unless otherwise noted. Samples received in good condition unless otherwise noted.Samples analyzed by EMSL Analytical, Inc. Carle Place, NY CT PH-0249, NYS ELAP 11469, MA AA000200, LELAP 04144


Report Amended: 11/26/2012 13:40:18 Replaces the Inital Report 11/20/2012 22:04:25. Reason Code: Data Entry-Results Changed

http://www.emsl.com





Volume(Liters)

Asbestos% of total

NonAsbestosFibers

PCM F/cc



Received: 11/15/12 5:43 AM

0829448B

Fax: (617) 946-3229Phone: (617) 946-6100

Project:




EMSL Order:

111412-PG060

061210663-0003

5 00.036 <0.004712




Analyst(s)





http://www.emsl.com





Volume(Liters)

Asbestos% of total

NonAsbestosFibers

PCM F/cc



Received: 11/15/12 8:47 PM

08-9448B

Fax: (617) 946-3229Phone: (617) 946-6100

Project:




EMSL Order:

111512-PG-032-SS02061210714-0002

43 00.052 <0.004668

111512 PG327 RH06061210714-0007

78 00.050 <0.004726




Analyst(s)





http://www.emsl.com





Volume(Liters)

Asbestos% of total

NonAsbestosFibers

PCM F/cc



Received: 11/16/12 2:32 AM


Fax: (617) 946-3229Phone: (617) 946-6100

Project:




EMSL Order:

111512-02-DT-02

061210717-0002

8.5 00.032 <0.003831




Analyst(s)



Ethan Chan (1)


http://www.emsl.com





Volume(Liters)

Asbestos% of total

NonAsbestosFibers

PCM F/cc



Received: 11/16/12 2:14 AM


Fax: (617) 946-3229Phone: (617) 946-6100

Project:




EMSL Order:

111512-P676-01A

061210726-0001

3.5 00.003 <0.003858

111512-P980-02A

061210726-0002

2.5 00.003 <0.003858




Analyst(s)

Test Report TEM7402-7.26.0 Printed: 11/19/2012 11:09:29 AM 1THIS IS THE LAST PAGE OF THE REPORT.


Ethan Chan (2)


http://www.emsl.com





Volume(Liters)

Asbestos% of total

NonAsbestosFibers

PCM F/cc



Received: 11/17/12 9:27 AM

08-29448B

Fax: (617) 946-3229Phone: (617) 946-6100

Project:




EMSL Order:

111612-PG035-KM01061210800-0001

26 00.034 <0.004666




Analyst(s)



Ethan Chan (1)


http://www.emsl.com





Volume(Liters)

Asbestos% of total

NonAsbestosFibers

PCM F/cc



Received: 11/18/12 3:18 PM


Fax: (617) 946-3229Phone: (617) 946-6100

Project:




EMSL Order:

11612-P980-RF-01061210822-0001

10 00.018 <0.004667




Analyst(s)



Ethan Chan (1)


http://www.emsl.com





Volume(Liters)

Asbestos% of total

NonAsbestosFibers

PCM F/cc



Received: 11/21/12 6:30 AM

Project # 08-29448b

Fax: (617) 946-3229Phone: (617) 946-6100

Project:




EMSL Order:

112012-PG035-TEM04061210915-0002

6.5 00.035 <0.003924

112012-P1453-TEM05061210915-0003

7 130.006 <0.0021414 Chrysotile 1




Analyst(s)

Test Report TEM7402-7.26.0 Printed: 11/21/2012 11:22:41 AM 1THIS IS THE LAST PAGE OF THE REPORT.


Ethan Chan (2)


http://www.emsl.com





Volume(Liters)

Asbestos% of total

NonAsbestosFibers

PCM F/cc



Received: 11/21/12 6:43 AM

Project # 08-29448b

Fax: (617) 946-3229Phone: (617) 946-6100

Project:




EMSL Order:

112012-P462-01A

061210916-0003

7.5 00.005 <0.004704

112012-P980-02A

061210916-0004

11.5 00.010 <0.0021211




Analyst(s)



Ethan Chan (2)


http://www.emsl.com


Appendix B: Analytical Laboratory Report –

Respirable Particulate and Crystalline Silica

Ms. Kerryann Jaggassar November 27, 2012Environ International20 Custom House StreetSuite 800Boston, MA 02110

DOH ELAP# 11626 Account# 25574 Login# L278674AIHA # 100324

Dear Ms. Jaggassar:

Enclosed are the analytical results for the samples received by our laboratory on November 20, 2012. All test results meet the quality control requirements of AIHA and NELAC unless otherwise stated in this report. All samples on the chain of custody were received in good condition unless otherwise noted.

Results in this report are based on the sampling data provided by the client and refer only to the samples as they were received at the laboratory. Unless otherwise requested, all samples will be discarded 14 days from the date of this report.

Current Scopes of Accreditation can be viewed at www.galsonlabs.com in the accreditations section under the "about Galson" tab.

Please contact Patty Gregorich at (888)-432-5227, if you would like any additional information regarding this report.

Thank you for using Galson Laboratories.

Sincerely,

Galson Laboratories

[qcsig]

Mary G. UnangstLaboratory Director

Enclosure(s)

Page 1 of 6 Report Reference:1 Generated:27-NOV-12 12:41

LABORATORY ANALYSIS REPORT

Client : National Grid 6601 Kirkville Road Site : NS East Syracuse, NY 13057 (315) 432-5227 FAX: (315) 437-0571 Date Sampled : 13-NOV-12 Account No.: 25574 www.galsonlabs.com Date Received : 20-NOV-12 Login No. : L278674

Date Analyzed : 20-NOV-12 - 22-NOV-12 Report ID : 760793

Respirable Dust and Crystalline Silica: Quartz, Cristobalite, TridymiteDust

Air Vol P E L Sample ID Lab ID Analyte l mg % mg/m3 mg/m3

111312-P1516-JC01 L278674-1 Dust 602 <0.050 <0.083 5.0 Quartz 602 <0.010 ND <0.017 Cristobalite 602 <0.010 ND <0.017 Tridymite 602 <0.020 ND <0.033

111312-FB-BL L278674-2 Dust NA <0.050 NA NA Quartz NA <0.010 ND NA Cristobalite NA <0.010 ND NA Tridymite NA <0.020 ND NA

111312-P980-EM-01 L278674-3 Dust 179.4 <0.050 <0.28 5.0 Quartz 179.4 <0.010 ND <0.056 Cristobalite 179.4 <0.010 ND <0.056 Tridymite 179.4 <0.020 ND <0.11

111312-P980-EM-02 L278674-4 Dust 480 0.080 0.17 5.0 Quartz 480 <0.010 ND <0.021 Cristobalite 480 <0.010 ND <0.021 Tridymite 480 <0.020 ND <0.042

COMMENTS: Please see attached lab footnote report for any applicable footnotes.

Level of quantitation: Dust 0.050mg Q:0.010mg C:0.010mg T:0.020m Submitted by: PAH/CMR Analytical Method : mod. NIOSH 0600/7500/mod. OSHA ID-142; Gr Approved by : AEC/KRK OSHA PEL (TWA) : see 1910.1000 (Table Z-3) Date : 27-NOV-12 NYS DOH # : 11626 Collection Media : PVC PW QC by: Tony D'Amico

< -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million mppcf -Million Particles per Cubic Foot







111312-P980-EM-03 L278674-5 Dust 439.4 <0.050 <0.11 5.0 Quartz 439.4 <0.010 ND <0.023 Cristobalite 439.4 <0.010 ND <0.023 Tridymite 439.4 <0.020 ND <0.046

111312-FB1 L278674-6 Dust NA <0.050 NA NA Quartz NA <0.010 ND NA Cristobalite NA <0.010 ND NA Tridymite NA <0.020 ND NA

111312-P1129D-JG02AM L278674-7 Dust 341 <0.050 <0.15 5.0 Quartz 341 <0.010 ND <0.029 Cristobalite 341 <0.010 ND <0.029 Tridymite 341 <0.020 ND <0.059

111312-P1129D-JG06PM L278674-8 Dust 361 <0.050 <0.14 5.0 Quartz 361 <0.010 ND <0.028 Cristobalite 361 <0.010 ND <0.028 Tridymite 361 <0.020 ND <0.055










111312-FBD-AS08 L278674-9 Dust NA <0.050 NA NA Quartz NA <0.010 ND NA Cristobalite NA <0.010 ND NA Tridymite NA <0.020 ND NA





LABORATORY FOOTNOTE REPORT

Client Name : National Grid Site :

6601 Kirkville Road East Syracuse, NY 13057 Date Sampled : 13-NOV-12 Account No.: 25574 (315) 432-5227 Date Received: 20-NOV-12 Login No. : L278674 FAX: (315) 437-0571 Date Analyzed: 20-NOV-12 - 22-NOV-12 www.galsonlabs.com

Unless otherwise noted below, all quality control results associated with the samples were within established control limits.

Unrounded results are carried through the calculations that yield the final result and the final result is rounded to the number of significant figures appropriate to the accuracy of the analytical method. Please note that results appearing in the columns preceeding the final result column may have been rounded in order to fit the report format and therefore, if carried through the calculations, may not yield an identical final result to the one reported.

The stated LOQs for each analyte represent the demonstrated LOQ concentrations prior to correction for desorption efficiency (if applicable).

Unless otherwise noted below, reported results have not been blank corrected for any field blank or method blank.

L278674 (Report ID: 760793): Dust analytical accuracy is within +/- 0.0047 mg (95% confidence interval or k=2). The estimateduncertainty applies to the media, technology, and SOP(s) referenced in this report and does notaccount for any uncertainty associated with the sampling process.The Cristobalite results are considered accurate to within +/-10.2% based on a 95%confidence interval (k=2). This method has an average recovery of 94.6%. The estimateduncertainty applies to the media, technology, and SOP(s) referenced in this report anddoes not account for any uncertainty associated with the sampling process.The Quartz results are considered accurate to within +/-13.6% based on a 95%confidence interval (k=2). This method has an average recovery of 105%. The estimateduncertainty applies to the media, technology, and SOP(s) referenced in this report anddoes not account for any uncertainty associated with the sampling process.The Tridymite results are considered accurate to within +/-28.8% based on a 95%confidence interval (k=2). This method has an average recovery of 107%. The estimateduncertainty applies to the media, technology, and SOP(s) referenced in this report anddoes not account for any uncertainty associated with the sampling process.SOPs: GRAV-SOP-1(16), ix-calibrate(8), ix-xrdashprep(15), ix-xrdreview(8), ix-xrdstdprep(19)The NIOSH 7500 minimum recommended sampling volume is 400 liters.

L278674-4 (Report ID: 760793): Cassette nibs missing from sample at receipt. Possible impact on results (if any) is unknown.

< -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million


of 6 Report Reference:1 Generated:27-NOV-12 12:41



Dear Ms. Jaggassar:






Sincerely,

Galson Laboratories

[qcsig]


Enclosure(s)



Client : National Grid 6601 Kirkville Road Site : NGRID East Syracuse, NY 13057 Project No. : 0829448B (315) 432-5227 FAX: (315) 437-0571 Date Sampled : 14-NOV-12 Account No.: 25574 www.galsonlabs.com Date Received : 20-NOV-12 Login No. : L278675




111412-P1427-MF03 L278675-1 Dust 1019 <0.050 <0.049 5.0 Quartz 1019 <0.010 ND <0.0098 Cristobalite 1019 <0.010 ND <0.0098 Tridymite 1019 <0.020 ND <0.020

111412-P764-WM06 L278675-2 Dust 925 <0.050 <0.054 5.0 Quartz 925 <0.010 ND <0.011 Cristobalite 925 <0.010 ND <0.011 Tridymite 925 <0.020 ND <0.022

111412-FB01-AS07 L278675-3 Dust NA <0.050 NA NA Quartz NA <0.010 ND NA Cristobalite NA <0.010 ND NA Tridymite NA <0.020 ND NA

111412-P1453-KM01 L278675-4 Dust 1118 <0.050 <0.045 5.0 Quartz 1118 <0.010 ND <0.0089 Cristobalite 1118 <0.010 ND <0.0089 Tridymite 1118 <0.020 ND <0.018


Level of quantitation: Dust 0.050mg Q:0.010mg C:0.010mg T:0.020m Submitted by: PAH/AJD Analytical Method : mod. NIOSH 0600/7500/mod. OSHA ID-142; Gr Approved by : AEC/KRK OSHA PEL (TWA) : see 1910.1000 (Table Z-3) Date : 27-NOV-12 NYS DOH # : 11626 Collection Media : PVC PW QC by: Tony D'Amico




Client Name : National Grid Site : NGRID Project No. : 0829448B






L278675 (Report ID: 760794): Dust analytical accuracy is within +/- 0.0047 mg (95% confidence interval or k=2). The estimateduncertainty applies to the media, technology, and SOP(s) referenced in this report and does notaccount for any uncertainty associated with the sampling process.The Cristobalite results are considered accurate to within +/-10.2% based on a 95%confidence interval (k=2). This method has an average recovery of 94.6%. The estimateduncertainty applies to the media, technology, and SOP(s) referenced in this report anddoes not account for any uncertainty associated with the sampling process.The Quartz results are considered accurate to within +/-13.6% based on a 95%confidence interval (k=2). This method has an average recovery of 105%. The estimateduncertainty applies to the media, technology, and SOP(s) referenced in this report anddoes not account for any uncertainty associated with the sampling process.The Tridymite results are considered accurate to within +/-28.8% based on a 95%confidence interval (k=2). This method has an average recovery of 107%. The estimateduncertainty applies to the media, technology, and SOP(s) referenced in this report anddoes not account for any uncertainty associated with the sampling process.SOPs: GRAV-SOP-1(16), ix-calibrate(8), ix-xrdashprep(15), ix-xrdreview(8), ix-xrdstdprep(19)





Dear Ms. Jaggassar:






Sincerely,

Galson Laboratories

[qcsig]


Enclosure(s)



Client : National Grid 6601 Kirkville Road Site : NATIONAL GRID East Syracuse, NY 13057 Project No. : 08 29448B (315) 432-5227 FAX: (315) 437-0571 Date Sampled : 14-NOV-12 - 15-NOV-12 Account No.: 25574 www.galsonlabs.com Date Received : 21-NOV-12 Login No. : L278798




111412-P980-RP-01 L278798-1 Dust 1206 <0.050 <0.041 5.0 Quartz 1206 <0.010 ND <0.0083 Cristobalite 1206 <0.010 ND <0.0083 Tridymite 1206 <0.020 ND <0.017


111412-P1441-GB-01C L278798-3 Dust 308 <0.050 <0.16 5.0 Quartz 308 <0.010 ND <0.032 Cristobalite 308 <0.010 ND <0.032 Tridymite 308 <0.020 ND <0.065

111412-P462-SM-02C L278798-4 Dust 359 <0.050 <0.14 5.0 Quartz 359 <0.010 ND <0.028 Cristobalite 359 <0.010 ND <0.028 Tridymite 359 <0.020 ND <0.056






Client : National Grid 6601 Kirkville Road Site : NATIONAL GRID East Syracuse, NY 13057 Project No. : 08 29448B (315) 432-5227 FAX: (315) 437-0571 Date Sampled : 14-NOV-12 - 15-NOV-12 Account No.: 25574 www.galsonlabs.com Date Received : 21-NOV-12 Login No. : L278798




111512-P980-RR-01 L278798-5 Dust 960 <0.050 <0.052 5.0 Quartz 960 <0.010 ND <0.010 Cristobalite 960 <0.010 ND <0.010 Tridymite 960 <0.020 ND <0.021







Client Name : National Grid Site : NATIONAL GRID Project No. : 08 29448B

6601 Kirkville Road East Syracuse, NY 13057 Date Sampled : 14-NOV-12 - 15-NOV-12 Account No.: 25574 (315) 432-5227 Date Received: 21-NOV-12 Login No. : L278798 FAX: (315) 437-0571 Date Analyzed: 21-NOV-12 - 27-NOV-12 www.galsonlabs.com





L278798 (Report ID: 760966): Dust analytical accuracy is within +/- 0.0047 mg (95% confidence interval or k=2). The estimateduncertainty applies to the media, technology, and SOP(s) referenced in this report and does notaccount for any uncertainty associated with the sampling process.The Cristobalite results are considered accurate to within +/-10.2% based on a 95%confidence interval (k=2). This method has an average recovery of 94.6%. The estimateduncertainty applies to the media, technology, and SOP(s) referenced in this report anddoes not account for any uncertainty associated with the sampling process.The Quartz results are considered accurate to within +/-13.6% based on a 95%confidence interval (k=2). This method has an average recovery of 105%. The estimateduncertainty applies to the media, technology, and SOP(s) referenced in this report anddoes not account for any uncertainty associated with the sampling process.The Tridymite results are considered accurate to within +/-28.8% based on a 95%confidence interval (k=2). This method has an average recovery of 107%. The estimateduncertainty applies to the media, technology, and SOP(s) referenced in this report anddoes not account for any uncertainty associated with the sampling process.SOPs: GRAV-SOP-1(16), ix-calibrate(8), ix-xrdashprep(15), ix-xrdreview(8), ix-xrdstdprep(19)The NIOSH 7500 minimum recommended sampling volume is 400 liters.





Dear Ms. Jaggassar:






Sincerely,

Galson Laboratories

[qcsig]


Enclosure(s)



Client : National Grid 6601 Kirkville Road Site : Brooklyn East Syracuse, NY 13057 Project No. : 08-29448B (315) 432-5227 FAX: (315) 437-0571 Date Sampled : 15-NOV-12 Account No.: 25574 www.galsonlabs.com Date Received : 20-NOV-12 Login No. : L278671




111512-P155-KG05 L278671-1 Dust 776 <0.050 <0.064 5.0 Quartz 776 <0.010 ND <0.013 Cristobalite 776 <0.010 ND <0.013 Tridymite 776 <0.020 ND <0.026

111512-P180-JM06 L278671-2 Dust 821 <0.050 <0.061 5.0 Quartz 821 <0.010 ND <0.012 Cristobalite 821 <0.010 ND <0.012 Tridymite 821 <0.020 ND <0.024

111512-FB-BL L278671-3 Dust NA <0.050 NA NA Quartz NA <0.010 ND NA Cristobalite NA <0.010 ND NA Tridymite NA <0.020 ND NA

111512-P897-BH02 L278671-4 Dust 1097 <0.050 <0.046 5.0 Quartz 1097 <0.010 ND <0.0091 Cristobalite 1097 <0.010 ND <0.0091 Tridymite 1097 <0.020 ND <0.018






Client : National Grid 6601 Kirkville Road Site : Brooklyn East Syracuse, NY 13057 Project No. : 08-29448B (315) 432-5227 FAX: (315) 437-0571 Date Sampled : 15-NOV-12 Account No.: 25574 www.galsonlabs.com Date Received : 20-NOV-12 Login No. : L278671




111512-P282-SF03 L278671-5 Dust 981 <0.050 <0.051 5.0 Quartz 981 <0.010 ND <0.010 Cristobalite 981 <0.010 ND <0.010 Tridymite 981 <0.020 ND <0.020

111512-P1427-DH04 L278671-6 Dust 1035 <0.050 <0.048 5.0 Quartz 1035 <0.010 ND <0.0097 Cristobalite 1035 <0.010 ND <0.0097 Tridymite 1035 <0.020 ND <0.019







Client Name : National Grid Site : Brooklyn Project No. : 08-29448B











Dear Ms. Jaggassar:






Sincerely,

Galson Laboratories

[qcsig]


Enclosure(s)



Client : National Grid 6601 Kirkville Road Site : NGRID East Syracuse, NY 13057 Project No. : 08-29448B (315) 432-5227 FAX: (315) 437-0571 Date Sampled : 16-NOV-12 Account No.: 25574 www.galsonlabs.com Date Received : 20-NOV-12 Login No. : L278649




111612-P1453-FB01 L278649-1 Dust 869 0.055 0.063 5.0 Quartz 869 <0.010 ND <0.012 Cristobalite 869 <0.010 ND <0.012 Tridymite 869 <0.020 ND <0.023

111612-P567-KW02 L278649-2 Dust 858 <0.050 <0.058 5.0 Quartz 858 <0.010 ND <0.012 Cristobalite 858 <0.010 ND <0.012 Tridymite 858 <0.020 ND <0.023

111612-P764-MD02 L278649-3 Dust 836 0.057 0.068 5.0 Quartz 836 <0.010 ND <0.012 Cristobalite 836 <0.010 ND <0.012 Tridymite 836 <0.020 ND <0.024

111612-P1427-WC03 L278649-4 Dust 1080 <0.050 <0.046 5.0 Quartz 1080 <0.010 ND <0.0093 Cristobalite 1080 <0.010 ND <0.0093 Tridymite 1080 <0.020 ND <0.019


Level of quantitation: Dust 0.050mg Q:0.010mg C:0.010mg T:0.020m Submitted by: PAH/PSG Analytical Method : mod. NIOSH 0600/7500/mod. OSHA ID-142; Gr Approved by : AEC/KRK OSHA PEL (TWA) : see 1910.1000 (Table Z-3) Date : 27-NOV-12 NYS DOH # : 11626 Collection Media : PVC PW QC by: Tony D'Amico




Client : National Grid 6601 Kirkville Road Site : NGRID East Syracuse, NY 13057 Project No. : 08-29448B (315) 432-5227 FAX: (315) 437-0571 Date Sampled : 16-NOV-12 Account No.: 25574 www.galsonlabs.com Date Received : 20-NOV-12 Login No. : L278649




111612-P282-AJ06 L278649-5 Dust 1000 <0.050 <0.050 5.0 Quartz 1000 <0.010 ND <0.010 Cristobalite 1000 <0.010 ND <0.010 Tridymite 1000 <0.020 ND <0.020

111612-P897-EK07 L278649-6 Dust 664 <0.050 <0.075 5.0 Quartz 664 <0.010 ND <0.015 Cristobalite 664 <0.010 ND <0.015 Tridymite 664 <0.020 ND <0.030

111612-PFB02-AS10 L278649-7 Dust NA <0.050 NA NA Quartz NA <0.010 ND NA Cristobalite NA <0.010 ND NA Tridymite NA <0.020 ND NA


Level of quantitation: Dust 0.050mg Q:0.010mg C:0.010mg T:0.020m Submitted by: PAH/PSG Analytical Method : mod. NIOSH 0600/7500/mod. OSHA ID-142; Gr Approved by : AEC/KRK OSHA PEL (TWA) : see 1910.1000 (Table Z-3) Date : 27-NOV-12 NYS DOH # : 11626 Collection Media : PVC PW QC by: Tony D'Amico




Client Name : National Grid Site : NGRID Project No. : 08-29448B






L278649 (Report ID: 760774): The Cristobalite results are considered accurate to within +/-10.2% based on a 95%confidence interval (k=2). This method has an average recovery of 94.6%. The estimateduncertainty applies to the media, technology, and SOP(s) referenced in this report anddoes not account for any uncertainty associated with the sampling process.The Quartz results are considered accurate to within +/-13.6% based on a 95%confidence interval (k=2). This method has an average recovery of 105%. The estimateduncertainty applies to the media, technology, and SOP(s) referenced in this report anddoes not account for any uncertainty associated with the sampling process.The Tridymite results are considered accurate to within +/-28.8% based on a 95%confidence interval (k=2). This method has an average recovery of 107%. The estimateduncertainty applies to the media, technology, and SOP(s) referenced in this report anddoes not account for any uncertainty associated with the sampling process.SOPs: GRAV-SOP-1(16), ix-calibrate(8), ix-xrdashprep(15), ix-xrdreview(8), ix-xrdstdprep(19)Dust analytical accuracy is within +/- 0.0047 mg (95% confidence interval or k=2). The estimateduncertainty applies to the media, technology, and SOP(s) referenced in this report and does notaccount for any uncertainty associated with the sampling process.





Dear Ms. Jaggassar:






Sincerely,

Galson Laboratories

[qcsig]


Enclosure(s)







111912-P764-AT08 L278791-1 Dust 665 <0.050 <0.075 5.0 Quartz 665 <0.010 ND <0.015 Cristobalite 665 <0.010 ND <0.015 Tridymite 665 <0.020 ND <0.030

111912-P1427-MA09 L278791-2 Dust 642 <0.050 <0.078 5.0 Quartz 642 <0.010 ND <0.016 Cristobalite 642 <0.010 ND <0.016 Tridymite 642 <0.020 ND <0.031

111912-P897-JP10 L278791-3 Dust 866 <0.050 <0.058 5.0 Quartz 866 <0.010 ND <0.012 Cristobalite 866 <0.010 ND <0.012 Tridymite 866 <0.020 ND <0.023

111912-FB02-AS11 L278791-4 Dust NA 0.14 NA NA Quartz NA <0.010 ND NA Cristobalite NA <0.010 ND NA Tridymite NA <0.020 ND NA


Level of quantitation: Dust 0.050mg Q:0.010mg C:0.010mg T:0.020m Submitted by: PAH/CRI/PSG Analytical Method : mod. NIOSH 0600/7500/mod. OSHA ID-142; Gr Approved by : AEC/KRK OSHA PEL (TWA) : see 1910.1000 (Table Z-3) Date : 28-NOV-12 NYS DOH # : 11626 Collection Media : PVC PW QC by: Tony D'Amico








111912-PG032-DD01 L278791-5 Dust 878 2.2 2.5 2.4 Quartz 878 0.046 2.1 0.052 Cristobalite 878 <0.010 ND <0.011 Tridymite 878 <0.020 ND <0.023

111912-PG035-MC03 L278791-6 Dust 910 <0.050 <0.055 5.0 Quartz 910 <0.010 ND <0.011 Cristobalite 910 <0.010 ND <0.011 Tridymite 910 <0.020 ND <0.022

111912-PG154-PM04 L278791-7 Dust 895 <0.050 <0.056 5.0 Quartz 895 <0.010 ND <0.011 Cristobalite 895 <0.010 ND <0.011 Tridymite 895 <0.020 ND <0.022

111912-P567-RS06 L278791-8 Dust 842 0.064 0.076 5.0 Quartz 842 <0.010 ND <0.012 Cristobalite 842 <0.010 ND <0.012 Tridymite 842 <0.020 ND <0.024










111912-05-AS-01M L278791-9 Dust 453 <0.050 <0.11 5.0 Quartz 453 <0.010 ND <0.022 Cristobalite 453 <0.010 ND <0.022 Tridymite 453 <0.020 ND <0.044

111912-P462-MR02M L278791-10 Dust 732 0.050 0.068 5.0 Quartz 732 <0.010 ND <0.014 Cristobalite 732 <0.010 ND <0.014 Tridymite 732 <0.020 ND <0.027






Client Name : National Grid Site : NGRID Project No. : 0829448B







L278791-4 (Report ID: 760965): Sample results have not been corrected for the blank value.





Dear Ms. Jaggassar:


Please note the ID discrepancy recorded on the attached chain of custody. Per your request, the ID from the chain has been used for this report.





Sincerely,

Galson Laboratories

[qcsig]


Enclosure(s)



Client : National Grid 6601 Kirkville Road Site : NGRID East Syracuse, NY 13057 Project No. : 08 29448B (315) 432-5227 FAX: (315) 437-0571 Date Sampled : 20-NOV-12 Account No.: 25574 www.galsonlabs.com Date Received : 21-NOV-12 Login No. : L278788




112012-P567-TB01 L278788-1 Dust 1021 0.13 0.13 5.0 Quartz 1021 <0.010 ND <0.0098 Cristobalite 1021 <0.010 ND <0.0098 Tridymite 1021 <0.020 ND <0.020

112012-P155-TD06 L278788-2 Dust 1011 <0.050 <0.049 5.0 Quartz 1011 <0.010 ND <0.0099 Cristobalite 1011 <0.010 ND <0.0099 Tridymite 1011 <0.020 ND <0.020

112012-P764-XD01 L278788-3 Dust 845 <0.050 <0.059 5.0 Quartz 845 <0.010 ND <0.012 Cristobalite 845 <0.010 ND <0.012 Tridymite 845 <0.020 ND <0.024

112012-P897-FR02 L278788-4 Dust 804 <0.050 <0.062 5.0 Quartz 804 <0.010 ND <0.012 Cristobalite 804 <0.010 ND <0.012 Tridymite 804 <0.020 ND <0.025


Level of quantitation: Dust 0.050mg Q:0.010mg C:0.010mg T:0.020m Submitted by: PAH/AJD/PSG Analytical Method : mod. NIOSH 0600/7500/mod. OSHA ID-142; Gr Approved by : AEC/KRK OSHA PEL (TWA) : see 1910.1000 (Table Z-3) Date : 27-NOV-12 NYS DOH # : 11626 Collection Media : PVC PW QC by: Tony D'Amico




Client : National Grid 6601 Kirkville Road Site : NGRID East Syracuse, NY 13057 Project No. : 08 29448B (315) 432-5227 FAX: (315) 437-0571 Date Sampled : 20-NOV-12 Account No.: 25574 www.galsonlabs.com Date Received : 21-NOV-12 Login No. : L278788




112012-P1427-PK03 L278788-5 Dust 876 <0.050 <0.057 5.0 Quartz 876 <0.010 ND <0.011 Cristobalite 876 <0.010 ND <0.011 Tridymite 876 <0.020 ND <0.023



Level of quantitation: Dust 0.050mg Q:0.010mg C:0.010mg T:0.020m Submitted by: PAH/AJD/PSG Analytical Method : mod. NIOSH 0600/7500/mod. OSHA ID-142; Gr Approved by : AEC/KRK OSHA PEL (TWA) : see 1910.1000 (Table Z-3) Date : 27-NOV-12 NYS DOH # : 11626 Collection Media : PVC PW QC by: Tony D'Amico




Client Name : National Grid Site : NGRID Project No. : 08 29448B






L278788 (Report ID: 760963): The Cristobalite results are considered accurate to within +/-10.2% based on a 95%confidence interval (k=2). This method has an average recovery of 94.6%. The estimateduncertainty applies to the media, technology, and SOP(s) referenced in this report anddoes not account for any uncertainty associated with the sampling process.The Quartz results are considered accurate to within +/-13.6% based on a 95%confidence interval (k=2). This method has an average recovery of 105%. The estimateduncertainty applies to the media, technology, and SOP(s) referenced in this report anddoes not account for any uncertainty associated with the sampling process.The Tridymite results are considered accurate to within +/-28.8% based on a 95%confidence interval (k=2). This method has an average recovery of 107%. The estimateduncertainty applies to the media, technology, and SOP(s) referenced in this report anddoes not account for any uncertainty associated with the sampling process.SOPs: GRAV-SOP-1(16), ix-calibrate(8), ix-xrdashprep(15), ix-xrdreview(8), ix-xrdstdprep(19)Dust analytical accuracy is within +/- 0.0047 mg (95% confidence interval or k=2). The estimateduncertainty applies to the media, technology, and SOP(s) referenced in this report and does notaccount for any uncertainty associated with the sampling process.



Appendix C: OSHA E-Tool Calculations for

Crystalline Silica

Freedom of Information Act | Privacy & Security Statement | Disclaimers | Customer Survey | Important Web Site Notices | International | Contact Us

U.S. Department of Labor | Occupational Safety & Health Administration | 200 Constitution Ave., NW, Washington, DC 20210 Telephone: 800-321-OSHA (6742) | TTY: 877-889-5627

www.OSHA.gov

Newsletter RSS Feeds Print This Page Text Size

eTools Home : Silica Site Map | SEP | FAQ | Bibliography | Glossary | Credits

Exposure

Measure Amount

Compare to Limit

Protection

Comparing Your Exposure to OSHA's Limit

Finding and comparing the actual exposure and the permissible limit will let you know if you need to take

action to protect against a silica hazard.

There is not one crystalline silica exposure limit for all cases. Rather, the limit is derived from a calculation that takes into account the percentage of quartz, cristobalite, tridymite, and respirable dust specific to your particular work-site. To determine the limit and compare it to the actual amount, you can:

Follow a written example to make the calculations yourself or

Let the Advisor Genius do the calculations for you You will supply certain data and the Genius will make some calculations to produce three different number:

The Genius performs calculations for a respirable dust sample. If your sample is collected as a total dust sample, you will need to make adjustments to the PEL and Severity the Genius calculates.

Apply Your Knowledge

There are also limits on coal dust and amorphous silica.

Continue with Taking Action to Protect Against Silica >>

PEL This number is the calculated permissible exposure limit for dust to which the worker may be exposed. It uses the data you supplied and is based on the percent crystalline silica in the sample. For example: 1.6 mg/m3

Exposure This number is the actual amount of dust that is in your work environment, for example: 4.8 mg/m3

Severity This number is derived by dividing the exposure by the PEL, for example: 4.8 / 1.6 = 3.0 If the severity number is higher than 1.0 you are above the limit. If the severity number is less than 1.0 you are below the limit.

Permissible Exposure Limit for Crystalline Silica

OSHA regulation 29 CFR 1910.1000 Table Z-3 is used to determine the exposure limits for crystalline silica. Though this regulation is under the General Industry Standard, crystalline silica exposures in the Construction and Maritime Industries are subject to this same limit. Regulating these industries under the General Industry Standard is specifically addressed in Appendix E of the OSHA Special Emphasis Program (SEP) for Silicosis.

Exposure | Measure Amount | Compare to Limit | Protection

eTools Home : Silica Site Map | SEP | FAQ | Bibliography | Glossary | Credits

A to Z Index | En español | Contact Us | FAQs | About OSHA

OSHA

What's New | Offices

Home Workers Regulations Enforcement Data & Statistics Training Publications Newsroom Small Business

Was this page helpful?

Page 1 of 1Silica eTool - Comparing Your Exposure to OSHA's Limit

12/14/2012http://www.osha.gov/dsg/etools/silica/compare_to_limit/compare_to_limit.html

Silica Exposure Calculator Report

Printed 28 November, 2012 at 3:35 PM using calculator version S1.0.

Employer: National Grid Employee: Sample collected: 11/19/12 Comments:

The following data was used for this calculation:

You assumed the default value of 0.3 for the sampling and analytical error (SAE).

The time weighted average (TWA) calculation is based on a full work shift (8 hours). Using the data listed above the following values have been determined:

Based on the severity calculation the marked action is recommended.

END OF REPORT

Breezy Point

Sample Time (min)

Sampling Rate (L/min)

Respirable Weight (mg)

Quartz %

Cristobalite %

Tridymite %

1 351 2.5 2.2 2.1 0 0Total 351 minutes 2.2 milligrams

PEL (mg/m3)

Exposure (mg/m3)

Severity (Exposure/PEL)

SAE* LCL** UCL***

2.44 1.83 0.752 0.3 0.452 1.05 *

** ***

Sampling and Analytical Error Lower Control Limit Upper Control Limit

[ ] A severity less than or equal to 1 means that you are under the Permissible Exposure Limit (PEL). If the sampling and analytical error upper control limit is greater than 0.5, it is recommended that you examine your workplace for possible actions you may be able to take to further lower your exposre.

[X] A severity less than or equal to 1 means that you are under the Permissible Exposure Limit (PEL). However, the sampling and analytical error upper control limit indicates that you may be above the PEL. You should continue to monitor your exposure to confirm that you are below the PEL, and it is recommended that you take appropriate actions to reduce your exposure.

[ ] A severity greater than 1 means that you are over the Permissible Exposure Limit (PEL). However, the sampling and analytical error lower control limit indicates that you may be below the PEL. You should continue to monitor your exposure, and you should implement controls which will reduce your exposure.

[ ] A severity greater than 1 means that you are over the Permissible Exposure Limit (PEL). You must take appropriate actions to reduce your exposure.

Page 1 of 1

11/28/2012http://www.osha.gov/dsg/etools/silica/compare_to_limit/genius/new_java/new_java.html

Silica Exposure Calculator Report

Printed 28 November, 2012 at 4:02 PM using calculator version S1.0.

Employer: National Grid Employee: Sample collected: 11/19/12

The following data was used for this calculation:

You assumed the default value of 0.3 for the sampling and analytical error (SAE).

The time weighted average (TWA) calculation is based on the sampling period (351 minutes). Using the data listed above the following values have been determined:

Based on the severity calculation the marked action is recommended.

END OF REPORT

Sample Time (min)

Sampling Rate (L/min)

Respirable Weight (mg)

Quartz %

Cristobalite %

Tridymite %

1 351 2.5 2.2 2.1 0 0Total 351 minutes 2.2 milligrams

PEL (mg/m3)

Exposure (mg/m3)

Severity (Exposure/PEL)

SAE* LCL** UCL***

2.44 2.51 1.03 0.3 0.728 1.33 *

** ***

Sampling and Analytical Error Lower Control Limit Upper Control Limit

[ ] A severity less than or equal to 1 means that you are under the Permissible Exposure Limit (PEL). If the sampling and analytical error upper control limit is greater than 0.5, it is recommended that you examine your workplace for possible actions you may be able to take to further lower your exposre.

[ ] A severity less than or equal to 1 means that you are under the Permissible Exposure Limit (PEL). However, the sampling and analytical error upper control limit indicates that you may be above the PEL. You should continue to monitor your exposure to confirm that you are below the PEL, and it is recommended that you take appropriate actions to reduce your exposure.

[X] A severity greater than 1 means that you are over the Permissible Exposure Limit (PEL). However, the sampling and analytical error lower control limit indicates that you may be below the PEL. You should continue to monitor your exposure, and you should implement controls which will reduce your exposure.

[ ] A severity greater than 1 means that you are over the Permissible Exposure Limit (PEL). You must take appropriate actions to reduce your exposure.

Page 1 of 1

11/28/2012http://www.osha.gov/dsg/etools/silica/compare_to_limit/genius/new_java/new_java.html

Appendix D: Photolog

Title: Site Photographs – National Grid Date: November 2012 Site: Long Island, Brooklyn, Breezy Point, Staten Island

Page 1 of 8

Photo 1: 11/12/2012 - Roadside at Rockaway West staging area near Riis Park. Temporary landfill for Storm Sandy debris in the distance.

Photo 2: 11/13/2012 - Work area in vicinity of CMS crew members clocking meter in basement of home, Long Beach West.


Page 2 of 8

Photo 3: 11/14/2012 - Outdoor conditions, heavy sand coating adjacent to CMS crew members changing a meter in basement of a home, Long Beach West.

Photo 4: 11/15/2012 - Basement conditions, debris adjacent to CMS work area when clocking meter in a basement, Rockaway West.


Page 3 of 8

Photo 5: 11/16/2012 - Outdoor work area, Construct/Maintain crew members utilized tools to unearth gas main for service, Rockaway West.

Photo 6: 11/13/2012 - Example of wet debris pile along the sidewalk, CMS crew performed home and building inspections in this area, Seagate.


Page 4 of 8

Photo 7: 11/14/2012 - Roadside at Beach 40th Street, high vehicle traffic including trucks hauling debris, heavy coating of sand along roadway, Seagate.

Photo 8: 11/15/2012 - Construct/Maintain crew members use shovel to remove sand, and gain access to service line prior to shut off at condemned homes, Sheepshead Bay.


Page 5 of 8

Photo 9: 11/15/2012 - Example of gas regulator on exterior of home, construct/maintain crew members check condition of regulator prior to shut off at condemned homes, Sheepshead Bay.

Photo 10: 11/16/2012 - Photo of general conditions when CMS crew performed pipe work for a leak repair at regulator on exterior of home, Seagate.


Page 6 of 8

Photo 11: 11/13/2012 - Ambient outdoor work conditions during regulator changes with bucket loaders and nearby dump truck activity, Staten Island.

Photo 12: 11/13/2012 - Immediate proximity of CMS workers performing work to active fiberglass re-installation by homeowners, Staten Island.


Page 7 of 8

Photo 13: 11/13/2012 - CMS crew performed work in an area adjacent to active drywall removal and fiberglass insulation installation operations by home owners, Staten Island.

Photo 14: 11/15/2012 - General outdoor work conditions for main gas line integrity by Construct personnel at Beacon/Roma Avenue intersection, Staten Island.


Page 8 of 8

Photo 15: 11/15/12 - Visible dust at nearby debris pile adjacent to Construct and CMS work activity. Homeowner dumping debris in distance, Staten Island.

Appendix E: Proposed Sampling Plan (email excerpt

11/10/12)

EMAIL EXERPT: ENVIRON PROPOSED SAMPLING PLAN (Sent via email on 11/10/12)

Subject: Exposure Assessment and Personal Air Sampling - Post Hurricane Work in Long Island

Karen and Kathy: Sorry for the delay…I am on mini holiday in southern Virginia. I did speak with Kathy about ½ hour ago and she gave me an overview of the situation with your Customer Meter Service Representatives (approximately 400) that are going door to door in various locations in Long Island that have been hit by the Super Storm and are now working in remediation type conditions (debris of all types) After obtaining Kathy’s background information, we would propose the following proposed sampling plan for the next couple of days

Full shift personal samples for asbestos

Full shift personal air samples for respirable dust and the 3 primary crystalline silicas I’m not sure if fiberglass is a big issue are not since I am assuming that it is wet. Please let us know if you would like this addressed. It actually may be able to be analyzed with the asbestos. Although molds and bacteria are obviously present, there are no real methods for personal air sampling (especially for a mobile work force) and since Kathy mentioned that folks are wearing or encouraged to use N95 masks that is probably the best course of action. PPE such as disposable Tyvek suits, disposable gloves and having some form of sanitizing wipes or bottled water/soap/paper towel to clean up after each visit is also highly recommended assuming this equipment is advisable. Our crew would also be able to possibly bring some real time respirable dust monitor so that they could periodically check area levels where folks are working. Based upon the information provided, I have contacted KerryAnn Jaggassar my prime associate (who was outsourced to NGrid for several years and has done work in Long Island) who is now contacting other consultants in our area on their availability. The plan would be for them to mobilize early tomorrow morning to Long Island (probably driving in 1-2 cars) and meet Kathy or her designee at a designated location by approximately 11-am till noon. Or if Kathy can provide points of contact in advance, they could meet representatives at other specified locations. They could then begin meet up with personnel at various locations and disperse the sampling equipment. The hope would be to get air sampling done on Sunday afternoon/evening and Monday and Tuesday if needed. Kathy indicated that the representatives work may be done by then. Our crew can mobilize with 5 sampling pumps and cyclones and some media immediately. But I have contacted Galson laboratories who can ship media and sampling equipment today (via commercial air carrier) to a sister lab (Accutest) in Dayton, NJ who could then meet our team on the road to provide an additional pre-calibrated 25 sampling pumps (that would give us 30 total) and cyclones and media. We would hope to be able to sample at least 40 representatives during this time period which is approximately 10% of the impacted populations. As discussed with Kathy we would be focusing our sampling on the members of the various unions in the area. All work would be conducted on a time and materials basis. Since NGrid already has an account with Galson..we could either have you invoiced directly or it can be handled by us. We will work with you to determine how expediently you want laboratory analysis turnaround time. All work would be conducted in accordance with our existing Terms and Conditions in the MSA.

In order to authorize us proceed please contact me ASAP at 617-259-0172 since I need to get our order into Galson by 4pm at the very latest to get equipment shipped. Please contact me with any questions via cell.

report: industrial hygiene exposure assessment and … · report: industrial hygiene exposure...

Documents