q l sj~ - nasa

Reply to Attn of:

National Aeronautics and Space Administration

Lyndon B. Johnson Space Center White Sands Test Facility P.O. Box 20 Las Cruces, NM 88004-0020

RE-19-074

Mr. John E. Kieling, Chief New Mexico Environment Department Hazardous Waste Bureau 2905 Rodeo Park Drive East, Building I Santa Fe, NM 87505

May 28, 2019

Subject: 400 Area Supplemental Groundwater and Soil Vapor Monitoring Plan

On August 14, 2018, NMED disapproved NASA's December 27, 2017 400 Area Closure Investigation Report with direction to revise the report based on 28 NMED comments. In Comments 17 and 18, NMED directed NASA to include recommendations for additional monitoring and the submittal of a monitoring plan for groundwater and soil vapor in the 400 Area by February 28, 2019. Because of other recommendations included in the revised report, NASA believed that NMED approval of the 400 Area Closure Investigation Report NMED Disapproval Response was required for implementation of the recommendations. On April 15, 2019, NMED informed NASA via email that the February 28, 2019 due date for the required monitoring plan remained in effect and recommended that NASA request an extension of time for submittal of the plan. On April 25, 2019, NASA requested and extension of time for submittal of the monitoring plan. NMED approved the request on May 2, 2019, extending the due date for submittal of the monitoring plan to May 31 , 2019.

This submittal provides the required supplemental groundwater and soil vapor monitoring plan for the 400 Area Closure as required by NMED's August 14, 2018 disapproval and recommended in NASA's November 29, 2019 revised report. Enclosure 1 provides a paper copy of the monitoring plan. Enclosure 2 provides the monitoring plan in PDF format on CD-ROM.

I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations.

If you have any questions or comments concerning this submittal, please contact Antonette Doherty at 575-524-5497.

Q_L SJ~ tvJ Timothy J. Davis Chief, Environmental Office

cc: Mr. Gabriel Acevedo Hazardous Waste Bureau New Mexico Environment Department 2905 Rodeo Park Drive East, Building I Santa Fe, NM 87505

400 Area Supplemental Groundwater and Soil Vapor Monitoring Plan

May 2019

NM8800019434


NASA Johnson Space Center White Sands Test Facility

400 Area Supplemental Groundwater and Soil Vapor Monitoring Plan

May 2019

I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations.

Timothy J. Davis Chief, NASA Environmental Office


Johnson Space Center White Sands Test Facility 12600 NASA Road Las Cruces, NM 88012 www.nasa.gov/ centers/wstf

www.nasa.gov

Date

400 Area Supplemental Monitoring Plan iii

Table of Contents

Table of Contents ......................................................................................................................................... iii List of Acronyms/Abbreviations .................................................................................................................. iv

1.0 Introduction ....................................................................................................................................... 1

2.0 Objectives and Scope ........................................................................................................................ 1

3.0 Monitoring Wells .............................................................................................................................. 1

4.0 Groundwater and Soil Vapor Sampling and Analysis ...................................................................... 2

4.1 Soil Vapor Sampling ..................................................................................................................... 2

4.2 Groundwater Sampling ................................................................................................................. 2

4.3 Sample Analysis and Data Management....................................................................................... 3

5.0 Schedule ............................................................................................................................................ 4

5.1 Groundwater and Soil Vapor Sampling ........................................................................................ 4

5.2 Reporting ....................................................................................................................................... 4

6.0 References ......................................................................................................................................... 4

Figure 1.1 WSTF Location Map ............................................................................................................ 5

Figure 1.2 400 Area Monitoring Wells .................................................................................................. 6

Table 3.1 400 Area Monitoring Well Summary ....................................................................................... 7

Appendix A 400 Area MSVGM and MSVM Well Completion Diagrams .............................................. A-1

400 Area Supplemental Monitoring Plan iv

List of Acronyms/Abbreviations

bgs Below ground surface ft Feet GMP Groundwater Monitoring Plan in. Inch(es) MSVGM Multiport soil vapor and groundwater monitoring MSVM Multiport soil vapor monitoring NASA National Aeronautics and Space Administration NMED New Mexico Environment Department VOC Volatile organic compound WSTF White Sands Test Facility

NASA White Sands Test Facility

400 Area Supplemental Monitoring Plan 1

1.0 Introduction

NASA (National Aeronautics and Space Administration) completed an investigation of the WSTF (White Sands Test Facility; Figure 1.1) 400 Area Closure in September 2017. The purpose of the investigation was determine the nature, extent, and potential migration pathways of contaminant releases from the 400 Area hazardous waste management unit (Figure 1.2). NASA submitted the 400 Area Closure Investigation Report (NASA, 2017) to the NMED (New Mexico Environment Department) on December 27, 2017.

On August 14, 2018, NMED disapproved NASA's December 27, 2017 400 Area Closure Investigation Report (NMED, 2018) with direction to revise the report based on 28 NMED comments. In Comment 17, NMED directed NASA to "Revise the report to address the need for additional groundwater and soil-gas sampling, data evaluation, and subsequent human health risk evaluation to support the vapor exposure pathway conclusion." In Comment 18, NMED stated, "Section 11.5 must be revised to include recommendations for submittal of a work plan for additional combined groundwater and soil-gas sampling at the 400 Area Closure for at least four sampling events on a quarterly reporting schedule." NASA revised the report to include a recommendation for additional groundwater and soil vapor sampling and submitted the 400 Area Closure Investigation Report - NMED Disapproval Response to NMED on November 29, 2018 (400 CIR; NASA, 2018c).

This monitoring plan supplements the 400 Area Investigation Report (NASA, 2018c) and the NASA WSTF GMP (Groundwater Monitoring Plan; NASA, 2018a) with project-specific groundwater and soil vapor monitoring requirements to address NMED’s August 14, 2018 comments.

2.0 Objectives and Scope

The objective of this monitoring plan is to provide project-specific sampling information for supplemental groundwater and soil vapor monitoring at and adjacent to the 400 Area closure. The purpose of this monitoring is to supplement the data obtained during the 400 Area investigation with additional groundwater and soil vapor VOC (volatile organic compounds) data to support further evaluation of the vapor intrusion pathway in the 400 Area as required by NMED (NMED, 2018). The plan identifies the groundwater and soil vapor monitoring wells that will be subject to supplemental monitoring, summarizes sampling methods for groundwater and soil vapor at these monitoring wells, summarizes analytical requirements for the monitoring wells, and provides sampling and reporting schedules required by NMED. The scope of monitoring described in this plan is limited to collecting samples for VOC analysis from specific groundwater and soil vapor monitoring wells within or adjacent to the 400 Area closure (Figure 1.2).

3.0 Monitoring Wells

As part of the 400 Area investigation, NASA installed 15 soil borings in which monitoring wells were installed. Eight of the borings were equipped with MSVGM (multiport soil vapor and groundwater monitoring) wells and seven were equipped with MSVM (multiport soil vapor monitoring) wells. NASA will use these 15 monitoring wells to collect required groundwater and soil vapor samples to meet the objectives of this plan.

NASA constructed MSVM wells in accordance with the NMED-approved 400 Area Investigation Abbreviated Drilling Work Plan (NASA, 2016), with minimal deviations as required to accommodate field conditions. MSVM wells consist of three to four stainless steel soil vapor monitoring implants installed at varying depths in the soil boring, each suspended by a stainless steel wire rope guideline and connected to the surface sample collection fitting with ¼-in. (inch) stainless steel tubing. Each soil vapor



implant is installed within approximately 5 ft (feet) of silica sand isolated from other sampling zones using annular seals of hydrated bentonite chips and grout consisting of Portland cement and bentonite.

NASA constructed MSVGM wells in general accordance with the Abbreviated Drilling Work Plan (NASA, 2016). Five of the wells are constructed with 4-in. stainless steel casing and screen, while three are constructed with 2-in. polyvinyl chloride casing and screen. In each MSVGM well, 15-ft groundwater monitoring well screens are surrounded by silica sand and isolated from the remainder of the borehole with annular seals of hydrated bentonite chips and grout consisting of Portland cement and bentonite. The soil vapor monitoring component of each well was constructed as described for MSVM wells.

Table 3.1 summarizes the 15 monitoring wells, which are shown on Figure 1.2. Details for each well installation are provided by the well completion diagrams in Appendix A. Additional information on 400 Area MSVGM and MSVM wells is available in NASA’s June 13, 2018 Well Completion Report 400 Area Monitoring Wells (NASA, 2018b).

4.0 Groundwater and Soil Vapor Sampling and Analysis

4.1 Soil Vapor Sampling

NASA will collect soil vapor samples from each operational soil vapor implant in the 15 MSVGM and MSVM wells in Table 3.1. Support and field activities at each MSVM and MSVGM well soil vapor sampling event include:

• Acquisition of appropriate sample containers.

• Preparation of required equipment and field records.

• Evacuation of three tubing volumes of potentially stagnant vapor from the soil vapor implants and stainless steel tubing.

• Measurement of concentrations of oxygen, carbon dioxide, and methane in soil vapor following evacuation of vapor prior to sampling.

• Collection of soil vapor samples in the laboratory-provided sample canisters.

• Collection of field quality control samples (duplicate samples, field blanks, and trip blanks) at frequencies consistent with current Permit requirements.

• Potential rehabilitation of non-productive soil vapor sampling zones.

• Management of soil vapor samples to ensure sample integrity during storage and shipment to the contracted off-site analytical laboratory.

• Management and retention of field sampling records.

4.2 Groundwater Sampling

In addition to soil vapor sampling, NASA will collect groundwater samples from the groundwater monitoring component of MSVGM wells 400-EV-131, 400-FV-131, 400-GV-125, 400-HV-147, 400-IV-123, and 400-JV-150 using dedicated low-flow bladder pumps. Support and field activities at each MSVGM well sampling event include:

• Acquisition of appropriate sample containers.

• Preparation of required equipment and field records.



• Measurement of static water level.

• Purging using low-flow methods that minimize the generation of purge water while ensuring representative groundwater is sampled from the screened interval of each well.

• Measurement of groundwater indicator parameters (pH, temperature, conductivity, dissolved oxygen, and oxidation-reduction potential) during purging to ensure the collection of representative groundwater samples.

• Collection of groundwater samples from the dedicated low-flow bladder pump and disposable discharge tubing in the laboratory-provided containers.

• Collection of field quality control samples (duplicate samples, field blanks, trip blanks, and matrix spike samples) at the frequencies described in the GMP (NASA, 2018a).

• Management of groundwater samples to ensure sample integrity during storage and shipment to the contracted off-site analytical laboratory.

• Management of investigation derived waste such as purged contaminated groundwater and disposable equipment that contacted contaminated groundwater.

• Management and retention of field sampling records.

MSVGM wells 400-KV-142 and 400-LV-125 are not currently equipped with groundwater sampling equipment. Initial development of well 400-KV-142 indicated that groundwater recovery following well evacuation is less than 1/10 ft per day. Well 400-LV-125 is installed in a currently unproductive fracture zone. Initial development at this well indicated that groundwater recovery following well evacuation is less than 1/10 ft per day. The water levels in these wells will be monitored following recharge events and the wells will be sampled with decontaminated non-dedicated sampling equipment if adequate groundwater is available. The GMP (NASA, 2018a) provides more detailed groundwater sampling information.

4.3 Sample Analysis and Data Management

NASA will collect soil vapor samples from 400 Area MSVM and MSVGM well in pre-cleaned laboratory-provided, 1-liter stainless steel SUMMA canisters. Samples will be submitted to the off-site contracted laboratory for analysis of VOC listed in Table 2.1 of the 400 CIR by EPA Method TO-15. NASA will collect groundwater samples from the groundwater monitoring components of the MSVGM wells in laboratory-provided, certified clean, 40-milliliter glass vials. Samples will be submitted to the off-site contracted laboratory for analysis of VOC listed in Table 2.1 of the 400 CIR by SW-846 Method 8260C.

The laboratory will provide chemical analytical data in a NASA-approved reporting format that includes a signed “hard copy” report and electronic data deliverable. Qualified NASA groundwater scientists will validate and verify analytical data and evaluate the data for usability on this project using established data quality procedures. Data are reviewed to ensure representativeness and comparability and to determine if systematic bias exists. Laboratory reports are thoroughly evaluated to assess data quality exceptions and apply quality flags to project data. NASA will ensure that analytical data obtained from supplemental sampling meet the project objectives and any significant data quality exceptions are resolved in a manner to ensure they do not negatively impact decision inputs.



5.0 Schedule

5.1 Groundwater and Soil Vapor Sampling

400 Area MSVGM wells are currently scheduled for quarterly groundwater sampling in accordance with the NMED-approved GMP (NASA, 2018a). NASA plans to maintain this sampling schedule and collect soil vapor samples from MSVGM and MSVM wells in conjunction with ongoing groundwater sampling, which is currently scheduled for the months of February, May, August, and November. All MSVGM and MSVM will be sampled within the month to support temporal data comparisons. NASA will initiate soil vapor sampling on a quarterly basis in the first scheduled month of groundwater sampling following NMED approval of this monitoring plan and continue sampling for four quarterly sampling events.

5.2 Reporting

During the year of planned soil vapor and groundwater sampling, NASA will provide routine updates in the Periodic Monitoring Reports, submitted to NMED on a quarterly basis in January, April, July, and October. Within 180 days of the completion of the final soil vapor and groundwater sampling event, NASA will provide a project status report for NMED review. The report will provide the data evaluation and subsequent human health risk evaluation to support NASA’s vapor exposure pathway conclusion for the 400 Area Closure as required by NMED (Comment 17, NMED; 2018).

6.0 References

NASA Johnson Space Center White Sands Test Facility. (2016, August 2). 400 Area Investigation Abbreviated Drilling Work Plan and Notification of Field Work Commencement. Las Cruces, NM.

NASA Johnson Space Center White Sands Test Facility. (2017, December 27). NASA WSTF 400 Area Closure Investigation Report. Las Cruces, NM.

NASA Johnson Space Center White Sands Test Facility. (2018a, April 24). NASA WSTF Groundwater Monitoring Plan Update for 2018. Las Cruces, NM.

NASA Johnson Space Center White Sands Test Facility. (2018b, June 13). Response to Disapproval – NASA White Sands Test Facility (WSTF) Well Completion Report 400 Area Monitoring Wells. Las Cruces, NM.

NASA Johnson Space Center White Sands Test Facility. (2018c, November 29). NASA WSTF 400 Area Closure Investigation Report – NMED Disapproval Response. Las Cruces, NM.

NMED Hazardous Waste Bureau. (2018, August 14). Disapproval 400 Area Closure Investigation Report. Santa Fe, NM.


Figure 1.1 WSTF Location Map

(SEE NEXT PAGE)

²0 10 20

Miles

WSMR Boundary

WSTF Boundary

WSTF Industrial Area

Jornada Experimental Range (JER)

May 2019

WSTF Location Map

£¤70

El Paso

§̈¦10

§̈¦10

§̈¦25

£¤180

£¤54Las

Cruces

Alamogordo £¤82

New Mexico

Texas

Mexico


Figure 1.2 400 Area Monitoring Wells

(SEE NEXT PAGE)

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400 Area Arroyo - Concrete Lined

400 Area Arroyo - Concrete Lined

400 Area Propulsion Facility

400-FV-131

400-GV-125400-HV-147

400-JV-150

400-EV-131

400-KV-142

400-LV-125

400-SV-09

400-SV-10400-SV-07

400-SV-03 400-SV-05400-SV-02

400-SV-15 400-IV-123

400 W

est Fa

ult

400 E

ast Fa

ult

²May 2019

400 Area Soil Vapor and Groundwater Monitoring Well Locations") MSVGM Well_̂ MSVM Well

!( Multiport Well!( Conventional Well

Inferred Fault

0 200 400Feet

1 in = 125 ft



Table 3.1 400 Area Monitoring Well Summary

Well ID Well Type

SV Port Depths (ft bgs)

GW Screen Interval (ft bgs)

Depth to GW (ft

bgs)

Groundwater Sampling System

400-EV-131 MSVGM 10, 50, 100, 130 131-146 139.04 Dedicated Low-flow Bladder Pump

400-FV-131 MSVGM 15, 63, 104, 130 130.5-145.5 131.75 Dedicated Low-flow Bladder Pump

400-GV-125 MSVGM 10, 46, 105, 120 125-140 127.52 Dedicated Low-flow Bladder Pump

400-HV-147 MSVGM 12, 45, 95, 130 147-162 136.61 Dedicated Low-flow Bladder Pump

400-IV-123 MSVGM 10, 45, 80, 118 123-138 130.76 Dedicated Low-flow Bladder Pump

400-JV-150 MSVGM 12.5, 50, 100, 145 150-165 143.23 Dedicated Low-flow Bladder Pump

400-KV-142 MSVGM 12.5, 50, 100, 137 142-157 151.03 Not Equipped1

400-LV-125 MSVGM 10, 50, 95, 122 125-140 NA Not Equipped2

400-SV-02 MSVM 10, 50, 100 NA NA NA

400-SV-03 MSVM 10, 50, 92 NA NA NA

400-SV-05 MSVM 10, 50, 100 NA NA NA

400-SV-07 MSVM 10, 45, 100 NA NA NA

400-SV-09 MSVM 10, 45, 104 NA NA NA

400-SV-10 MSVM 10, 50, 100, 125 NA NA NA

400-SV-15 MSVM 10, 50, 90 NA NA NA 1 Initial development at this well indicated that groundwater recovery following well evacuation is less than 1/10 ft

per day. The water level in this well will be monitored following recharge events and the well will be sampled with decontaminated non-dedicated sampling equipment if adequate groundwater is available.

2 Indicates that the well is installed in a currently unproductive fracture zone. The water level in this well will be monitored following recharge events and the well will be sampled with decontaminated non-dedicated sampling equipment if adequate groundwater is observed. Initial development at this well indicated that groundwater recovery following well evacuation is less than 1/10 ft per day. The water level in this well will be monitored following recharge events and the well will be sampled with decontaminated non-dedicated sampling equipment if adequate groundwater is available.


400 Area Supplemental Monitoring Plan A-1

Appendix A 400 Area MSVGM and MSVM Well Completion Diagrams

Total Borehole Depth: 154.5’

Port Depth:130’

Well Completion Diagram 400-EV-131

Well Apron Design & Construction:4’ circular, 18” deep, sloped concrete apron, Steel well protector with Protective Barrier Posts

Notes:-Diagram not to scale.-All depths are below ground surface (bgs).-Stainless Steel hose clamp was used to secure tubing to guide lines every 5’.-A guide line was used for each soil vapor port.

0-3’ is Portland Type I/1I Cement Ground Surface (in east impoundment) = 02’

154.5’

44.8’

50.5’

102.6’

97.3’

127.4’

Port Depth:100’

Port Depth: 50’

3-7.5’ is 3/8” Bentonite ChipsCalculated Volume: 1.72 ft3

Actual Volume: 5.05 ft3

Water Table (6/26/17):

139.04’

8” Steel Well Protector with Locking Cap

++

Coordinates (amsl): 554,883.91 N; 1,530,620.93 EBrass Cap: 4,832.08’Borehole Diameter (Depth): Cored 6.1” (0-153’); reamed 7.5” (to 154.5’); 9.5” (to 144’); Drilling Method: Sonic coring with casing advanceTemporary Casing: Drive casing 9.5” to 144’

Construction Start Date: 9/29/16 Time: 1000Construction End Date : 10/4/16 Time: 1000Development Start Date: 12/7/16 Time: 1406Development End Date: 12/16/16 Time: 0939Development Method: Surge/Bail/Add Water/PumpTotal Purge Volume: 143 gallonsFinal Turbidity (NTU): 3.95

Soil Vapor Zones: 7.5’- 12.5’ port at 10’44.8’- 50.5’ port at 50’

97.3’- 102.6’ port at 100’127.4’- 154.5’ port at 130’

Groundwater Zone: 127.4’-154.5’Screen: 131’-146’Comments: Was soil boring 400-SB-04

7.5-12.5’ is Filter Pack: 2/12 SandCalculated Volume: 1.91 ft3


12.5-22.5’ is 3/8” Bentonite ChipsCalculated Volume: 3.82 ft3


22.5-37.6’ is Portland Type I/II Cement with 5% BentoniteCalculated Volume: 5.77 ft3




50.5-61’ is 3/8” Bentonite ChipsCalculated Volume: 4.01 ft3














61-87.5’ is Portland Type I/II Cement with 5% BentoniteCalculated Volume: 10.12 ft3




7.5’

12.5’Port Depth:

10’

¼” diameter type 304/304L stainless steel tubing.½” x 12” L-H thread soil vapor implant filter cylindrical screens, 0.011 Twill, type 304 stainless steel, 60 x 60, Item #SVPT99 with 300 series machined ends. ¼” Swagelok® fitting #QC4-SS-D-L-¼ for attachment of sampling equipment. Each soil vapor port installed with a depth label at surface.3/8” stainless steel guide line (with stainless steel weight below each port).¾” x 1.5’ steel weight attached to the bottom of stainless steel guide line.4” ID (4.5” OD) type 316/316L schedule 10 stainless steel casing, flush threaded joints.4” ID (4.5” OD) type 316 stainless steel screen (0.010” slot).Water tableType I/II Portland CementType I/II Portland Cement with 5% Bentonite3/8” Bentonite Chips (hydrated)

2/12 Colorado Silica Sand

Santa Fe Group AlluviumCemented Santa Fe Group AlluviumAndesite Bedrock

+

Screen Interval:131-146’

Total Well Depth: 146’

102.5-152’Cemented Santa Fe Group Alluvium(Bedrock)

152-154.5’Andesite Bedrock

0-102.5’Santa Fe Group Alluvium

0-144’9.5” Borehole(Drive Casing)

Well Casing Stick-Up: +2.87’

144-154.5’7.5” Borehole

Sampling System:-Dedicated low-flow QED Environmental Systems bladder pump, model P1150U.-Includes Teflon-lined ¼” OD air supply and groundwater sample tubes.


Port Depth:130’

Well Completion Diagram 400-FV-131

Well Apron Design & Construction:4’ diameter circular sloped concrete apron, Steel well protector with Protective Barrier Posts

Notes:-Diagram not to scale.-All depths are below ground surface (bgs).-Stainless Steel hose clamp was used to secure tubing to guide lines every 5’.-Deepest port attached to well casing. Middle two ports attached on one guide line. Shallow port attached to separate guide line.

0-2’ is Portland Type I/1I Cement Ground Surface = 02’

153’

60.4’

65.3’

106.5’

101.4’

127.1’

Port Depth:104’

Port Depth: 63’




131.75’


++

Coordinates (amsl): 554,783.24 N; 1,530,181.02 EBrass Cap: 4,815.43’Borehole Diameter/Depth: Cored 6.1” (0-108.5’); reamed 7.5” (to 62’), 8.3” (to 109’); 8.5” (109-153.5’) Drilling Method: Sonic coring to bedrock / Air rotary in bedrock (109-153.5’)Temporary Casing: Drive Casing 9.5” to 19.5’

Construction Start Date: 11/09/16 Time: 0922Construction End Date : 11/10/16 Time: 1145Development Start Date: 12/6/16 Time: 0800Development End Date: 1/26/17 Time: 0845Development Method: Surge/Bail/PumpTotal Purge Volume: 165 gallonsTurbidity (NTU): 4.87


101.4’- 106.5’ port at 104’127.1’- 153’ port at 130’

Groundwater Zone: 127.1’-153’Screen: 130.5’-145.5’Comments: Was soil boring 400-SB-14

















127.1-153’ is Filter Pack: 2/12 SandCalculated Volume: 7.55 ft3










12.4’

17.5’Port Depth:

15’



Slough


+

Screen Interval:130.5-145.5’

Total Well Depth: 145.5’

104.3-136’Cemented Santa Fe Group Alluvium (Bedrock)136-153.5’Andesite Bedrock

0-104.3’Santa Fe Group Alluvium

0-19.5’9.5” Borehole(Drive Casing)

19.5-109’8.3” Borehole


109-153.5’8.5” Borehole



Port Depth:120’

Well Completion Diagram 400-GV-125

Well Apron Design & Construction:4’ circular sloped concrete apron, Steel well protectorwith Protective Barrier Posts

Notes:-Diagram not to scale.-All depths are below ground surface (bgs).-Stainless Steel hose clamp was used to secure tubing to guide line every 5’.-Deepest 2 soil vapor ports attached to one guide line.Soil vapor ports at 10’ and 46’ have weight attached to port tubing; no guide line.


166.5’

43.5’

48.6’

106.5’

101.4’

117.5’

Port Depth:105’

Port Depth: 46’




127.52’


++

Coordinates (amsl): 554,838.22 N; 1,530,296.59 EBrass Cap: 4,818.86’Borehole Diameter/Depth: Cored 6.1” (0-107.5’); reamed 8.3” (to 167.5’); 9.5” (to 41’) Drilling Method: Sonic coring to bedrock / Air rotary in bedrock (107.5-167.5’)Temporary Casing: Drive Casing 9.5” to 41’



102.7’- 107.6’ port at 105’117.5’- 149.8’ port at 120’
























7.1’

12.6’Port Depth:

10’

¼” diameter type 304/304L stainless steel tubing.½” x 12” L-H thread soil vapor implant filter cylindrical screens, 0.011 Twill, type 304 stainless steel, 60 x 60, Item #SVPT99 with 300 series machined ends. ¼” Swagelok® fitting #QC4-SS-D-L-¼ for attachment of sampling equipment. Each soil vapor port installed with a depth label at surface.3/8” stainless steel guide line (with stainless steel weight below each port).¾” x 1.5’ steel weight attached to the bottom of stainless steel guideline.4” ID (4.5” OD) type 316/316L schedule 10 stainless steel casing, flush threaded joints.4” ID (4.5” OD) type 316 stainless steel screen (0.010” slot).Water tableType I/II Portland CementType I/II Portland Cement with 5% Bentonite3/8” Bentonite Chips (hydrated)


Slough


+



107-148.5’Cemented Santa Fe Group Alluvium (Bedrock)148.5-167.5’Andesite Bedrock

0-107’Santa Fe Group Alluvium


41-167.5’8.25” Borehole




149.8’



Port Depth:130’

Well Completion Diagram 400-HV-147


Notes:-Diagram not to scale.-All depths are below ground surface (bgs).-Stainless Steel hose clamp was used to secure tubings to guide line every 5’.-Vapor ports at 95’ and 130’ are on same guide line.Other ports on separate guide lines.


172.6’

41.1’

47.3’

97.8’

92.3’

123.5’

Port Depth:95’

Port Depth: 45’




136.61’


++

Coordinates (amsl): 554,813.50 N; 1,530,474.81 EBrass Cap: 4,829.26’Borehole Diameter/Depth: Cored 6.1” (0-110’); reamed 8.3” (to 109.5’); 8.5” (to 172.9’); 9.5” (to 37’)Drilling Method: Sonic coring to bedrock / Air rotary in bedrock (110-172.9’)Temporary Casing: Drive casing 9.5” to 37’



92.3’- 97.5’ port at 95’123.5’- 172.6’ port at 130’
























9.5’

14.5’Port Depth:

12’



Slough


+



109-157’Cemented Santa Fe Group Alluvium (Bedrock)

157-172.9’Andesite Bedrock



37-109.5’8.3” Borehole




107.7-117’ is Portland Type I/II Cement with 5% BentoniteCalculated Volume: 2.43 ft3


110-172.9’8.5” Borehole


Total Borehole Depth: 155’

Port Depth:118’

Well Completion Diagram 400-IV-123

Well Apron Design & Construction:4’ circular sloped concrete apron, Steel well protectorwith Protective Barrier Posts

Notes:-Diagram not to scale.-All depths are below ground surface (bgs).-Stainless Steel hose clamp was used to secure tubing to guide lines every 5’.-Two vapor ports installed per guide line.


155’

42.6’

47.4’

82.5’

77.3’

115’

Port Depth:80’

Port Depth: 45’




130.76’


++

Coordinates (amsl): 554,995.63 N; 1,531,966.75 EBrass Cap: 4,864.22’Borehole Diameter/Depth: Cored 6.1” (0-85’); reamed 7.5” (to 83’); 8.3” (to 81’); 8.5” (to 155’); 9.5” to 40’ Drilling Method: Sonic coring to bedrock / Air rotary in bedrock (83-155’)Temporary Casing: Drive casing 9.5” to 40’

Construction Start Date: 10/22/16 Time: 1629Construction End Date : 10/24/16 Time: 0858Development Start Date: 12/5/16 Time: 1050Development End Date: 1/25/17 Time: 1237Development Method: Surge/Bail/PumpTotal Purge Volume: 221.5 gallonsTurbidity (NTU): 2.7


77.3’- 82.5’ port at 80’115’- 154.1’ port at 118’

Groundwater Zone: 115’-154.1’Screen: 123’-138’Comments: Was soil boring 400-SB-12















115-154.1’ is Filter Pack: 2/12 SandCalculated Volume: 11.95 ft3








7.5’

12.6’Port Depth:

10’



Slough

Santa Fe Group Alluvium

Cemented Santa Fe Group AlluviumHornfels Bedrock

+



81-154.4’Hornfels Bedrock



40-154.4’8.3” Borehole




154.1’






Port Depth:145’

Well Completion Diagram 400-JV-150

Well Apron Design & Construction:4’ diameter circular 4” deep, sloped concrete apron, Steel well protector with Protective Barrier Posts

Notes:-Diagram not to scale.-All depths are below ground surface (bgs).-Stainless Steel hose clamp was used to secure tubing to guide line every 5’.-All ports on separate guide lines.


175’

47.4’

52.4’

102.5’

97.4’

141.9’

Port Depth:100’

Port Depth: 50’




143.23’


++

Coordinates (amsl): 554,745.84 N; 1,530,515.12 EBrass Cap: 4,835.71’Borehole Diameter/Depth: Cored to 6.1” (0-175); reamed 7.5” (to 97.5’); 9.5” (to 18.5’); Drilling Method: Sonic CoringTemporary Casing: Drive Casing 9.5” to 18.5’

Construction Start Date : 12/21/16 Time: 1301Construction End Date : 12/22/16 Time: 0958Development Start Date: 1/26/17 Time: 1410Development End Date: 3/17/17 Time: 1315Development Method: Surge/Bail/PumpTotal Purge Volume: 64.75 gallonsTurbidity (NTU): 4.62

Soil Vapor Zones: 10’- 15’ port at 12.5’47.5’- 52.5’ port at 50’97.5’- 102.5’ port at 100’141.9’- 175’ port at 145’

Groundwater Zone: 141.9’ - 175’Screen: 150’ - 165’Comments: Was soil boring 400-SB-11



























9.9’

15’Port Depth:

12.5’¼” diameter type 304/304L stainless steel tubing.½” x 12” L-H thread soil vapor implant filter cylindrical screens, 0.011 Twill, type 304 stainless steel, 60 x 60, Item #SVPT99 with 300 series machined ends. ¼” Swagelok® fitting #QC4-SS-D-L-¼ for attachment of sampling equipment. Each soil vapor port installed with a depth label at surface.3/8” stainless steel guide line (with stainless steel weight below each port).¾” x 1.5’ steel weight attached to the bottom of stainless steel guide line 1 ½” ID (2” OD) CertainTeedTM

Schedule 40 PVC Casing.1 ½” ID (2” OD) Schedule 40 PVC screen (0.020” slot).Water tableType I/II Portland CementType I/II Portland Cement with 5% Bentonite3/8” Bentonite Chips (hydrated)12/20 Colorado Silica Sand


+



113-162’Cemented Santa Fe Group Alluvium (Bedrock)162-175’Andesite Bedrock



18.5-97.5’7.5” Borehole

97.5-175’6.1” Borehole




Port Depth:137’

Well Completion Diagram 400-KV-142

Well Apron Design & Construction:4’diameter circular and 4” deep, sloped concrete apron, Steel well protector with Protective Barrier Posts

Notes:-Diagram not to scale.-All depths are below ground surface (bgs).-Stainless Steel hose clamp was used to secure tubings to guide line every 5’.-Soil ports installed on separate guide lines.


159’

47.5’

52.7’

102.5’

97.2’

134.5’

Port Depth:100’

Port Depth: 50’

2-10’ is 3/8” Bentonite ChipsCalculated Volume: 3.36 ft3



151.03’


++

Coordinates (amsl): 554,831.80 N; 1,530,686.14 EBrass Cap: 4,839.53’Borehole Diameter/Depth: Cored 6.1” (0-163’); reamed 7.5” (75-105’) 8.3” (to 75’); 9.5” (to 18.5’)Drilling Method: Sonic CoringTemporary Casing: Drive Casing 9.5” to 18.5’

Construction Start Date : 1/6/17 Time: 1125Construction End Date : 1/7/17 Time: 1100Development Start Date: 1/27/17 Time: 0942Development End Date: 4/17/17 Time: 0840Development Method: Surge/Bail/Added Water/PumpTotal Purge Volume: 31.5 gallonsTurbidity (NTU): 1.23

Soil Vapor Zones: 10’- 15’ port at 12.5’47.5’- 52.7’ port at 50’97.2’- 102.5’ port at 100’134.5’- 159’ port at 137’

Groundwater Zone: 134.5’ - 159’Screen: 142’ - 157’Comments: Was soil boring 400-SB-06

10-15’ is Filter Pack: 12/20 SandCalculated Volume: 2.10 ft3


15-26’ is 3/8” Bentonite ChipsCalculated Volume: 3.31 ft3
























10’

15’Port Depth:

12.5’

¼” diameter type 304/304L stainless steel tubing.½” x 12” Swagelok® L-H thread soil vapor implant filter cylindrical screens, 0.011 Twill, type 304 stainless steel, 60 x 60, Item #SVPT99 with 300 series machined ends. ¼” Swagelok fitting #QC4-SS-D-L-¼ for attachment of sampling equipment. Each soil vapor port installed with a depth label at surface.3/8” stainless steel guide line (with stainless steel weight below each port).¾” x 1.5’ steel weight attached to the bottom of stainless steel guide line.1 ½” ID (2” OD) CertainTeedTM

Schedule 40 PVC Casing.1 ½” ID (2” OD) Schedule 40 PVC screen (0.020” slot).Water tableType I/II Portland CementType I/II Portland Cement with 5% Bentonite3/8” Bentonite Chips (hydrated)


Slough


+




154-163’Andesite Bedrock



18.5-75’8.3” Borehole

105-163’6.1” Borehole


75-105’7.5” Borehole

Sampling System:-None due to low recharge rate. -Sampled with decontaminated bailer initially.


Port Depth:122’

Well Completion Diagram 400-LV-125


Notes:-Diagram not to scale.-All depths are below ground surface (bgs).-Stainless Steel hose clamp was used to secure tubing to guideline every 5’.

0-2’ is Portland Type I/1I Cement Ground Surface (inconcrete flume toeast impoundment) = 0

2’

154.2’

47.5’

52.5’

97.5’

92.5’

117.5’

Port Depth:95’

Port Depth: 50’



Water Table Screen Dry


Coordinates (amsl): 554,893.87 N; 1,530,873.50 EBrass Cap: 4,838.68’Borehole Diameter/Depth: Cored 6.1” (0-156’); reamed 7.5” (to 95’); 9.5”(to 18.5’)Drilling Method: Sonic CoringTemporary Casing: Drive Casing 9.5” to 18.5’

Construction Start Date : 1/12/17 Time: ~0950Construction End Date : 01/13/17 Time: 1105Development Start Date: Not Developed; Dry Well; No water was encountered during drilling. Screen was placed to capture potential future recharge events.

Soil Vapor Zones: 7.5’- 12.6’ port at 10’47.5’- 52.5’ port at 50’92.5’- 97.5’ port at 95’117.5’-154.2’ port at 122’

12/20 Sand Zone: 117.5’-154.2’Screen: 125’ - 140’Comments: Was soil boring 400-SB-01



12.6-25’ is 3/8” Bentonite ChipsCalculated Volume: 3991 ft3
























7.5’

12.6’Port Depth:

10’

¼” diameter type 304/304L stainless steel tubing.½” x 12” L-H thread soil vapor implant filter cylindrical screens, 0.011 Twill, type 304 stainless steel, 60 x 60, Item #SVPT99 with 300 series machined ends. ¼” Swagelok® fitting #QC4-SS-D-L-¼ for attachment of sampling equipment. Each soil vapor port installed with a depth label at surface.3/8” stainless steel guide line (with stainless steel weight below each port).¾” x 1.5’ steel weight attached to the bottom of stainless steel guide line.1 ½” ID (2” OD) CertainTeedTM

Schedule 40 PVC Casing.1 ½” ID (2” OD) Schedule 40 PVC screen (0.020” slot).Water tableType I/II Portland CementType I/II Portland Cement with 5% Bentonite3/8” Bentonite Chips (hydrated)


Slough


+




127-156’Andesite Bedrock


0-18.5’9” Borehole(Drive Casing)

18.5-95’7.5” Borehole

98-154.2’6.1” Borehole


Sampling System:-Dry well. No sampling system installed.


Port Depth:

100’

Well Completion Diagram 400-SV-02


Notes:-Diagram not to scale.-All depths are below ground surface (bgs).-Stainless Steel hose clamp was used to secure tubing to guide line every 5’.

-Vapor ports installed on separate guide lines.0-2’ is Portland Type I/1I Cement Ground Surface (in

concrete flume toeast impoundment) = 0

2’

104’

47.5’

52.5’

97.5’

Port Depth:

50’

2-7.5’ is 3/8” Bentonite Chips

Calculated Volume: 2.71 ft3Actual Volume: 3.64 ft3

8” Steel Well Protector

with Locking Cap

Coordinates (amsl): 554,895.09 N; 1,530,796.47 EBrass Cap: 4,836.95’

Borehole Diameter/Depth: Cored 6.1” (0-105’); reamed 7.5” (to 105’); 9.5” (to 38’)

Drilling Method: Sonic Coring (with casing advance)Temporary Casing: Drive Casing 9.5” to 38’

Construction Start Date: 1/13/17 Time: 1330Construction End Data: 1/15/17 Time: ~1700

Soil Vapor Zones: 7.5’- 12.5’ port at 10’

47.5’- 52.5’ port at 50’

97.5’- 104’ port at 100’

Comments: Was soil boring 400-SB-02

7.5-12.5’ is Filter Pack: 12/20 SandCalculated Volume: 2.46 ft3Actual Volume: 4.00 ft3

12.5-22.5’ is 3/8” Bentonite Chips


22.5-37.5’ is Portland Type I/II Cement with 5% BentoniteCalculated Volume: 7.63 ft3Actual Volume: 13.50 ft3







97.5-104’ is Filter Pack: 12/20 SandCalculated Volume: 1.74 ft3Actual Volume: 1.50 ft3



7.5’

12.5’

Port Depth:

10’

¼” diameter type 304/304L

stainless steel tubing.½” x 12” L-H thread soil vapor implant filter cylindrical screens, 0.011 Twill, type 304 stainless steel, 60 x 60, Item #SVPT99 with 300 series machined ends. ¼” Swagelok® fitting #QC4-SS-D-L-¼ for attachment of sampling equipment. Each soil vapor port installed with a depth label at surface.3/8” stainless steel guide line (with

stainless steel weight below each port).¾” x 1.5’ steel weight attached to

the bottom of stainless steel guide line.Type I/II Portland CementType I/II Portland Cement with 5% Bentonite3/8” Bentonite Chips (hydrated)

2/12 Colorado Silica SandSloughSanta Fe Group AlluviumCemented Santa Fe Group Alluvium

103-105’

Cemented Santa Fe Group Alluvium (Bedrock)

0-103’

Santa Fe Group

Alluvium

0-38’

9.5” Borehole

38-105’

7” Borehole


Port Depth:

92’



Notes:-Diagram not to scale.-All depths are below ground surface (bgs).-Stainless Steel hose clamp was used to secure tubing to guide lines every 5’.

-Port at 10’ attached to one guide line; ports at

50’ and 92’ are attached to a separate guide line.

0-2’ is Portland Type I/1I Cement Ground Surface (ineast impoundment) = 02’

108’

47.3’

53’

89.1’

Port Depth:

50’




with Locking Cap



Drilling Method: Sonic coring (with casing advance)Temporary Casing: Drive Casing 9.5” to 37’

Construction Start Date: 10/12/16 Time: 0854Construction End Date: 10/13/16 Time: 1020


47.3’- 53’ port at 50’

89.1’- 108’ port at 92’















7.5’

12.7’

Port Depth:

10’





2/12 Colorado Silica SandSanta Fe Group AlluviumCemented Santa Fe Group AlluviumAndesite Bedrock

105-108’


0-105’

Santa Fe Group

Alluvium

0-37’

9.5” Borehole

(Drive Casing)

37-95’

7.5” Borehole

95-108’

6.1” Borehole


Port Depth:

100’


Well Apron Design & Construction:4’ diameter circular, 4” deep, sloped concrete apron, Steel well protector with Protective Barrier Posts


-Vapor ports installed on separate guide lines.0-2’ is Portland Type I/1I Cement Ground Surface (in

ramp to east impoundment) = 0

2’

109’

47.5’

52.3’

97.5’

Port Depth:

50’




with Locking Cap



Drilling Method: Sonic oring (with casing advance)Temporary Casing: Drive Casing 9.5” to 18’

Construction Start Date: 1/16/17 Time: 0830Construction End Data: 1/16/17 Time: 1435


47.5’- 52.3’ port at 50’

97.5’- 109’ port at 100’



12.7-22’ is 3/8” Bentonite Chips


22-37.5’ is Portland Type I/II Cement with 5% BentoniteCalculated Volume: 4.14 ft3Actual Volume: 7.35 ft3










7.5’

12.7’

Port Depth:

10’






106-110’


0-106

Santa Fe Group

Alluvium

0-18’

9.5” Borehole

(Drive Casing)

18-90’

7.5” Borehole

90-110’

6.1” Borehole


Port Depth:

100’




-Ports installed on separate guide lines.0-2’ is Portland Type I/1I Cement Ground Surface = 0

2’

104’

47.5’

52.5’

97.5’

Port Depth:

45’




with Locking Cap



Drilling Method: Sonic coring (with casing advance)Temporary Casing: Drive Casing 9.5” to 20’



47.5’- 52.5’ port at 45’

97.5’- 104’ port at 100’















7.5’

12.5’

Port Depth:

10’






108.5-109’


0-108.5’

Santa Fe Group

Alluvium

0-20’

9.5” Borehole

(Drive Casing)

20-95’

8.3” Borehole

95-109’

6.1” Borehole


Port Depth:

104’




-No guide line used for 10’ port. Other ports on

Separate guide lines.


108.5’

41’

47.8’

100.1’

Port Depth:

45’




with Locking Cap


Borehole Diameter/Depth: Cored 6.1” (0-108.5’); reamed 8.3” (to 100’)

Drilling Method: Sonic coring (with casing advance)Temporary Casing: Drive Casing 9.5” to 20.5’



41’- 47.8’ port at 45’

100.1’- 108.5’ port at 104’














41-47.8’ is Filter Pack: 2/12 SandCalculated Volume: 2.68 ft3Actual Volume: 2.50 ft3

7.5’

12.8’

Port Depth:

10’





2/12 Colorado Silica SandSanta Fe Group AlluviumCemented Santa Fe Group Alluvium

108-108.5’


0-108’

Santa Fe Group

Alluvium

0-20.5’

9.5” Borehole

(Drive Casing)

20.5-100’

8.3” Borehole

100-108.5’

6.1” Borehole


Port Depth:

100’




-Two vapor ports installed per guide line.0-2’ is Portland Type I/1I Cement Ground Surface = 0

2’

102.5’

47.5’

52.7’

97.4’

Port Depth:

50’




with Locking Cap


Borehole Diameter/Depth: Cored 6.1” (0-109’); reamed 7.5” (to 100’), 8.3” (to 109’); 8.5” (to 173.5’)

Drilling Method: Sonic coring to bedrock / Air rotary in bedrock (109-173.5’)

Temporary Casing: Drive Casing 9.5” to 30’



47.5’- 52.7’ port at 50’

97.4’- 102.5’ port at 100’

122.2’-127.8’ port at 125’













65.7-87’ is Portland Type I/II Cement with 5% BentoniteCalculated Volume: 8.39 ft3Actual Volume: 9.36 ft3


7.3’

12.6’

Port Depth:

10’




the bottom of stainless steel guide line. Type I/II Portland CementType I/II Portland Cement with 5% Bentonite3/8” Bentonite Chips (hydrated)

2/12 Colorado Silica SandSloughSanta Fe Group AlluviumCemented Santa Fe Group AlluviumAndesite Bedrock

101-147.9’

Cemented Santa Fe Group Alluvium

(Bedrock)

0-101’

Santa Fe Group

Alluvium

0-30’

9.5” Borehole

(Drive Casing)

30-109’

8.3” Borehole






110-115’ is Portland Type I/II Cement with 5% BentoniteCalculated Volume: 1.86 ft3Actual Volume: 1.74 ft3

Port Depth:

125’127.8’

122.2’

147.9-173.5’

Andesite Bedrock 127.8-173’ is 3/8” Bentonite Chips


109-173.5’

8.5” Borehole


Port Depth:

90’



Notes:-Diagram not to scale.-All depths are below ground surface (bgs).-Stainless Steel hose clamp was used to secure tubing to guide lines every 5’.

-Port at 10’ is attached to one guide line; ports at

50 and 90’ are attached to a separate guide line.


93.6’

47.5’

52.5’

87.5’

Port Depth:

50’




with Locking Cap



Drilling Method: Sonic coring with casing advanceTemporary Casing: Drive casing 9.5” to 67’



47.5’- 52.5’ port at 50’

87.5’- 93.6’ port at 90’















7.5’

12.7’

Port Depth:

10’

¼” diameter type 304/304L stainless steel tubing.½” x 12” L-H thread soil vapor implant filter cylindrical screens, 0.011 Twill, type 304 stainless steel, 60 x 60, Item #SVPT99 with 300 series machined ends. ¼” Swagelok® fitting #QC4-SS-D-L-¼ for attachment of sampling equipment. Each soil vapor port installed with a depth label at surface.3/8” stainless steel guide line (with

stainless steel weight below each port).¾” x 1.5’ steel weight attached to the bottom of stainless steel guide line. Type I/II Portland CementType I/II Portland Cement with 5% Bentonite3/8” Bentonite Chips (hydrated)


92-95’


0-92’

Santa Fe Group

Alluvium

0-67’

9.5” Borehole

(Drive Casing)

67-95’

7.5” Borehole

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