rep 1129 2004 water quality report - port of vancouver · 1.0 introduction evs environment...

EVS Environment Consultants A Member of the Golder Group of Companies

REPORT ON

Submitted to:

Vancouver Port Authority 100 The Pointe

999 Canada Place Vancouver, BC

V6C 3T4

DISTRIBUTION: 8 Copies - Vancouver Port Authority 2 Copies - Golder Associates Ltd. November 29, 2004 04-1422-019

WATER QUALITY REPORT

ROBERTS BANK EXPANSION PROJECT

A Member of the Golder Group of Companies

Golder Associates Ltd. 195 Pemberton Avenue North Vancouver, British Columbia Canada V7P 2R4 Telephone 604-986-4331 Fax 604-662-8548

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EXECUTIVE SUMMARY

Proposed Project The Vancouver Port Authority (VPA) is proposing to add a third berth to the existing Deltaport Container Terminal. Previous port development on Roberts Bank has changed the pattern of water circulation along the Roberts Bank foreshore, and concerns have been expressed that further development at Deltaport will increase the potential for polluting nearby waters.

Water Sampling Program To-date, EVS Environment Consultants (EVS; a Member of the Golder Group of Companies) has completed five months of water quality sampling on Roberts Bank (May to October 2004). Monthly water samples were taken at eight “monitoring” sites between Canoe Pass and Point Roberts, and two “reference” sites off Westham Island, remote from the Roberts Bank terminal. The ten sampling stations were arranged in five pairs, each consisting of a “nearshore” station, on the landward side of the 5 m depth contour at the edge of Roberts Bank, and a “farshore” station on the open water side of the 5-m depth contour. At each station, one water sample was collected from immediately below the water surface (“surface” samples), and one sample was taken from a location 2 m above the bottom (“deep” samples).

Sampling Methods DO, pH, temperature, salinity, and turbidity were measured in the field using digital meters. Chlorophyll a; NH4-N, NO3-N, NO2-N, dissolved ortho-P, and TSS were analyzed in the laboratory.

Dissolved Oxygen and Temperature

In general, dissolved oxygen (DO) and temperature were lower at farshore stations than at nearshore stations decrease with depth.

Turbidity and Total Suspended Solids

Turbidity and total suspended solids (TSS) were highly variable over the five-month sampling period, but were generally highest in from May-late June, and declined during the August-September period. Turbidity was generally higher in surface water samples than in deep samples.

Salinity Salinity varied among stations, and this variability was most pronounced among nearshore stations. In general, salinity was greater at deep sites than at surface sites.

Nutrients NH4-N and ortho-P concentrations were generally similar across stations and depths, whereas NO3-N concentrations were up to five times higher at farshore stations than at nearshore stations (Figure 7). NO2-N concentrations were below detection limits in all samples taken.

Chlorophyll a Chlorophyll a concentrations were consistently higher at nearshore stations than at farshore stations. There are not apparent relationships between any of the individual nutrients concentrations and chlorophyll a concentrations.

Polycyclic aromatic hydrocarbons

All PAH compounds were below method detection limits.

Inter-Causeway Nearshore Site

Temperature, pH, TSS, salinity, and concentrations of DO, NH4-N, NO3-N, NO2-N, and ortho-P measured at station RB6 (near the agricultural ditch outflow) on October 6 were within the range of values obtained at sites elsewhere on Roberts Bank on the same date. However, the concentration of chlorophyll a at station RB6 was lower than at any of the other sites sampled. TSS, NH4-N, NO3-N, NO2-N, and ortho-P were measured within the drainage ditch on October 6.

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TABLE OF CONTENTS

SECTION PAGE

1.0 INTRODUCTION .................................................................................................. 1 1.1 Background................................................................................................. 1 1.2 Study Objectives ......................................................................................... 1

2.0 METHODS ............................................................................................................. 3 2.1 Study Area/Scope of Assessment ............................................................... 3 2.2 Sample Collection....................................................................................... 3

2.2.1 Sample Collection and Processing.................................................. 3 2.2.1.1 Quality Assurance/Quality Control (QA/QC) – Field Sampling.... 4 2.2.2 Water Chemistry ............................................................................. 5 2.2.2.1 Specific Analytical Methodology ................................................... 5

3.0 RESULTS AND DISCUSSION............................................................................. 6 3.1 Monitoring and Reference Stations ............................................................ 6 3.2 Stations In and Near the Agricultural Drainage Ditch................................ 7 3.3 Comparison of Roberts Bank Water Quality to Ambient Guidelines......... 7 3.4 Comparison to Historical Data.................................................................... 8 3.5 Recommendations for Future Sampling ..................................................... 8

4.0 REFERENCES ....................................................................................................... 9 5.0 LIMITATIONS..................................................................................................... 10 6.0 CLOSURE ............................................................................................................ 11 LIST OF FIGURES Figure 1 Water quality sampling locations Figure 2 Temporal variation in dissolved oxygen concentrations at surface and

depth locations at Roberts Bank, Delta, BC. (A: nearshore stations; B: farshore stations). Columns represent mean values for all stations at a given depth, and error bars indicate ranges of measured values

Figure 3 Temporal variation in temperature at surface and depth at Roberts Bank, Delta, BC. (A: nearshore stations; B: farshore stations). Columns represent mean values for all stations at a given depth, and error bars indicate ranges of measured values

Figure 4 Temporal variation in turbidity at surface and depth at Roberts Bank, Delta, BC (A: nearshore stations; B: farshore stations). Columns represent mean values for all stations at a given depth, and error bars indicate ranges of measured values

Figure 5 Temporal variation in total suspended solids (TSS) at surface and depth at Roberts Bank, Delta, BC (A: nearshore stations; B: farshore stations). Columns represent mean values for all stations at a given depth, and error bars indicate ranges of measured values

Figure 6 Temporal variation in salinity at surface and depth at Roberts Bank, Delta, BC (A: nearshore stations; B: farshore stations). Columns represent mean values for all stations at a given depth, and error bars indicate ranges of measured values

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Figure 7 Temporal variation in nutrients at depth at Roberts Bank, Delta, BC (A: nearshore stations; B: farshore stations). The column represents the mean value for all stations at a given depth, and the error bars indicate the range

Figure 8 Temporal variation in chlorophyll a at depth at Roberts Bank, Delta, BC (A: nearshore stations; B: farshore stations). The column represents the mean value for all stations at a given depth, and the error bars indicate the range

Figure 9 Correlation between nutrient and chlorophyll a concentrations, Roberts Bank, Delta, BC

Figure 10 Correlation between dissolved oxygen concentrations and depth, Roberts Bank, Delta, BC (the grey lines represent the BC water quality objectives for dissolved oxygen)

LIST OF TABLES Table 1 Results of in situ measurements and laboratory analyses of water samples

collected from Roberts Bank, Delta, BC on May 5, 2004 Table 2 Results of in situ measurements and laboratory analyses of water samples

collected from Roberts Bank, Delta, BC on June 2-3, 2004 Table 3 Results of in situ measurements and laboratory analyses of water samples

collected from Roberts Bank, Delta, BC on June 30, 2004 Table 4 Results of in situ measurements and laboratory analyses of water samples

collected from Roberts Bank, Delta, BC on August 12, 2004 Table 5 Results of in situ measurements and laboratory analyses (physical and

nutrient parameters) of water samples collected from Roberts Bank, Delta, BC on September 29 and October 6, 2004

Table 6 Results of in situ measurements and laboratory analyses of water samples at various depths collected from Roberts Bank, Delta, BC on September 29 and October 6, 2004

Table 7 Results of in situ measurements and laboratory analyses of water samples at various depths collected from Roberts Bank, Delta, BC on September 29 and October 6, 2004

Table 8 QA/QC results for laboratory analyses of field duplicate water samples collected from Roberts Bank, Delta, BC

Table 9 Comparison of laboratory analyses and in situ measurements of water quality at Roberts Bank, Delta, BC (May – October), shown as mean ± standard deviation, with historical data

LIST OF APPENDICES Appendix I Laboratory Reports for Water Quality Results

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1.0 INTRODUCTION

EVS Environment Consultants (EVS; a Member of the Golder Group of Companies) was retained by the Vancouver Port Authority (VPA) to conduct a baseline water quality sampling program on Roberts Bank, in support of VPA’s proposed Roberts Bank Port Expansion Project (RBPEP), which is located in North Delta, B.C., approximately 35 km south of Vancouver.

1.1 Background

The proposed RBPEP will consist of two main components: (i) the addition of a third berth to the existing Deltaport Container Terminal, and (ii) the construction of a new three-berth container facility (Terminal 2) at the terminal. The project currently before the BC Environmental Assessment Office (EAO) is scoped to include only the addition of the third berth to the Deltaport terminal, recognizing the construction of Terminal 2 will be the subject of a separate environmental review process.

The Roberts Bank Container Expansion Program is a VPA initiative to expand container-handling facilities at Roberts Bank in Delta, B.C. The program will initially add a third-berth to the existing Deltaport container terminal (the Project), followed by the development of a new three-berth container terminal, known as Terminal 2. The Terminal 2 proposal is completely independent of the Deltaport Third Berth Expansion in all aspects including site location, terminal configuration, environmental study and impact assessment, construction, operation and development schedule.

Previous industrial development on Roberts Bank has involved construction of the Tsawwassen Ferry Terminal in 1960, followed by development of the Roberts Bank coal port in 1969. Expansions of the Roberts Bank Port facilities and ferry terminal took place in 1981 and 1991, respectively (Tarbotton and Harrison, 1996).

Industrial development on Roberts Bank has changed the pattern of water circulation along the Roberts Bank foreshore, and concerns have been expressed that further development at Deltaport will increase the potential for pollution of the waters of Roberts Bank through industrial activities, and eutrophication (related to excess nutrients contributed from adjacent agricultural lands) in the inter-causeway area.

1.2 Study Objectives

The purpose of the baseline water quality sampling program is to characterize the pre-project water quality conditions, such that impacts from construction and operation on water quality can be predicted and monitored.

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Specifically, our investigation focused on answering the following questions regarding baseline water quality conditions at Roberts Bank:

• What is the pre-project range of values for water quality parameters in the surface waters around the Roberts Bank Terminal, relative to the range of values at sites remote from the terminal (i.e., reference sites)?

• How do the values for water quality parameters vary spatially and temporally (i.e., seasonally) in the waters of the study area and reference sites?

• How do the values for water quality parameters at the study and reference sites compare with provincial ambient water quality guidelines (WQG)?

To-date, EVS has completed five months of water quality sampling at ten sites on Roberts Bank. Two additional sites (one near the shore in the inter-causeway area, and one in the Brandrith drainage ditch) were sampled in October 2004. The purpose of this report is to provide a summary of the results obtained to date and a preliminary assessment of water quality on Roberts Bank.

Specific water quality parameters considered in our study were: dissolved oxygen (DO) concentration, pH, water temperature, turbidity, salinity, total suspended solids (TSS), and concentrations of ammonia nitrogen (NH4-N), nitrate nitrogen (NO3-N), and nitrite nitrogen (NO2-N), dissolved ortho-phosphorus (ortho-P), and chlorophyll a. These parameters were chosen because of concerns expressed regarding the potential for changes in the nutrient regime and increased primary productivity as a result of changes in the pattern of currents along Roberts Bank. As well, TSS and turbidity may be affected during the construction and operation of the expansion project. The specific parameters provide an indication of the potential for direct toxicity (e.g., NH4-N) and indirect effects (e.g., dissolved oxygen content) of nutrient loading. During the October 2004 sampling, polycyclic aromatic hydrocarbons (PAHs) were also measured in response to a request from Fisheries and Oceans Canada.

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2.0 METHODS

2.1 Study Area/Scope of Assessment

Sampling to characterize baseline water quality has involved monthly collection of water samples at eight “monitoring” sites between Canoe Pass and the ferry terminal, and two “reference” sites off Westham Island, remote from the Roberts Bank Terminal (Figure 1). These ten stations were arranged in five pairs, each consisting of a “nearshore” station, on the landward side of the 5 m depth contour at the edge of Roberts Bank, and a “farshore” station on the open water side of the 5-m depth contour.

On October 6, two additional locations were sampled in order to obtain data regarding nutrient inputs into the area between the BC Ferries and Deltaport causeways (Figure 1). One sample was obtained at the outlet of an agricultural drainage ditch near the base of the BC Ferries causeway, and another sample was obtained from in the ditch itself.

2.2 Sample Collection

2.2.1 Sample Collection and Processing

Sampling was conducted on May 5, June 2-3, June 30, August 12, and September 29-October 6, 2004, at or near the time of high tide. Water samples were collected and processed at each station according to standard procedures described in Environment Canada (1994) and the Puget Sound Estuary Program (PSEP) protocols (PSEP, 1987, 1997).

At each of the monitoring and reference stations, one water sample was collected from immediately below the water surface (“surface” samples), and one sample was taken from a depth 2 m above the bottom (“deep” samples). At nearshore stations, deep samples were taken at water depths of 4.5-6.5 m, whereas at farshore stations, deep samples were taken at depths of 13.4-36.2 m. On September 29 and October 6, additional water samples were taken at depths of 0, 2, 4, 6, 8, 10, and 12 m at stations RB1b, RB2b, and RB3b, to assess the degree to which various water quality parameters (i.e., DO, pH, temperature, salinity) varied with water depth.

All water samples were collected using a 3-L Van Dorn sampler. The sampler was attached to the cable 2 m above a lead cannonball to prevent contamination of the water sample due to bottom disturbance. The sampler was triggered once the cannonball reached the bottom.

From each 3-L water sample, the following containers were filled:

• One 250-mL amber glass jar for NH4-N (field preserved with sulphuric acid);

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• One 500-mL high-density polyethylene (HDPE) bottle for NO3-N, and NO2-N, dissolved ortho-P, and TSS;

• One 500-mL heat-treated amber glass jar with a Teflon-lined lid for PAH (October 2004 only); and

• One wide-mouth plastic bottle for on-site measurement of DO, pH, and temperature using appropriate portable meters.

Water samples for chlorophyll a analysis were field-filtered through a cellulose-fibre filter using a portable filter system, preserved with magnesium carbonate and wrapped in tin foil.

All the water chemistry sample containers were packed in insulated coolers with freezer packs to maintain a temperature of approximately 4°C while on board the vessel and during storage and transport to the analytical laboratories.

Sample collection log sheets contained observations of collection time, weather conditions (precipitation, wind speed and direction), tidal height, vessel drift and direction, vessel position (GIS coordinates) during water sampling, and depth.

2.2.1.1 Quality Assurance/Quality Control (QA/QC) – Field Sampling

To ensure the integrity of the sample collection process, a QA/QC was included in our sampling program. Specific aspects of the field quality assurance program included:

• Sample collection and processing was conducted by qualified experienced personnel, using specific protocols for sample collection, handling and preservation, and maintaining detailed records to document all aspects of the field sampling program.

• Samples were collected in such a way that no foreign material was introduced to the sample and no material of interest escaped from the sample prior to analysis. Sample handling or contact with contaminating materials/surfaces was minimized through the use of separate sets of tools (e.g., mixing bowls, utensils, siphon tubes) for each station.

• A duplicate sample was collected from depth at Station RB4b during all five sampling events and submitted to the laboratory for chemical analyses of TSS and nutrients (chlorophyll a was not analyzed in the duplicate samples). Relative percent difference (RPD) between the original and duplicate samples was calculated using the BC Field Sampling Manual (BCMWLAP 2003) to identify variability associated with sampling. An RPD value of ±20% for values ≥5 times

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the method detection limit (MDL) was used to identify differences between original and duplicate samples. Values less than 5 times the MDL were not included in the RPD calculations because analytical variability near the method detection limit is much higher and does not provide a good measure of variability associated with the collection of field duplicates.

• Samples were packaged and shipped to each laboratory by appropriate means and with chain-of-custody documentation, to ensure that holding times and storage conditions for the analyses are met.

2.2.2 Water Chemistry

2.2.2.1 Specific Analytical Methodology

Field Measurements

Field water measurements conducted during the sampling event included the following parameters:

• DO was measured in situ using an Orion 835A dissolved oxygen meter set to the observed sample salinity. The meter has a resolution of 0.1 mg/L.

• pH was determined using a Horiba D-22 meter, which has a resolution of 0.01 relative pH units. Concurrent temperature measurements were made with either the DO or the pH meter.

• Salinity was measured using a YSI 85 meter.

• Turbidity was measured using a Hach DR-890, which has a resolution of 1 FAU.

All field meters were calibrated as per the instrument manual at the beginning of each day prior to the first measurements.

Laboratory Measurements

All bulk water chemical analyses were performed by ALS Environmental, Vancouver, BC. Each water sample was analyzed for chlorophyll a; NH4-N, NO3-N, NO2-N, dissolved ortho-P, and TSS. A subset of samples (October 2004) were analyzed for polycyclic aromatic hydrocarbons. Further details on analytical methods, including QA/QC, are summarized in Appendix I.

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3.0 RESULTS AND DISCUSSION

3.1 Monitoring and Reference Stations

The results of the laboratory analyses and in situ measurements made to date are summarized in Tables 1 through 7, and in laboratory reports are in Appendix I.

In general, DO (Figure 2) and temperature (Figure 3) were lower at deep stations than at surface stations. Surface DO and temperature concentrations did not vary noticeably between nearshore and farshore stations, but deep samples taken from farshore stations were generally cooler and had lower DO concentrations than deep samples from nearshore stations. In general, temperature and DO on Roberts Bank decrease with increasing depth (Table 6). Because much of the DO in marine waters enters the water column from the surface, it is not surprising that surface waters are more oxygenated than deeper waters. Similarly, in the absence of mixing, the temperature of sun-warmed surface waters is expected to be higher than the water temperature at depth, provided the air temperature exceeds the water temperature. Higher water temperatures generally result in decreased DO content.

Turbidity (Figure 4) and TSS (Figure 5) were highly variable over the five-month sampling period, but were generally highest from May-late June, and declined during the August-September period. This reflects the influence of turbid Fraser River water on Roberts Bank, with the amount of turbidity and TSS reflecting the seasonal variation in river flow. Variation in turbidity and TSS among stations and sampling dates also reflects pre-sampling rainfall events, and wave-generated turbidity. Turbidity was generally highest in surface water samples, except for samples from Station RB5a, at which the highest turbidity measurements were observed. This station is located furthest north, and is more influenced by the Fraser River than the other stations.

Salinity varied among stations, and this variability was most pronounced among nearshore stations (Figure 6). In general, salinity was greater at deep sites than at surface sites, and this reflects the influence of freshwater from the Fraser River and the estuarine character of the Roberts Bank environment. In estuaries, the less dense freshwater typically “floats” on top of the heavier salt water. Salinity was higher at the southernmost sampling stations, which are farthest away from the freshwater influence of the Fraser River.

NH4-N concentrations were generally similar across stations and depths, whereas ortho-P concentrations appeared to decrease slightly from north to south (Figure 7). NO3-N concentrations were lowest at stations RB1a and RB1b, southeast of the Deltaport Terminal, and were up to five times higher at the farshore stations than at nearshore stations. NO2-N concentrations were <MDL in all samples taken.

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Chlorophyll a concentrations were consistently higher at nearshore stations than at farshore stations, particularly during the June 2 sampling event (Figure 8). There do not appear to be any strong relationships between any of the individual nutrients concentrations and chlorophyll a concentrations (Figure 9).

All PAH compounds measured in the water samples from the October 2004 sampling event were below detection limit (Table 7). These results are not surprising as PAHs tend not to be measurable in the water column unless there is an ongoing or persistent source (e.g., a fuel spill).

The results of the field duplicate sample are summarized in Table 8. The RPD threshold of ±20% was exceeded in May for ortho-P, and in October for chlorophyll a.

3.2 Stations In and Near the Agricultural Drainage Ditch

Temperature, pH, TSS, salinity, and concentrations of DO, NH4-N, NO3-N, NO2-N, and dissolved ortho-P measured at station RB6 (near the agricultural ditch outflow) on October 6 were within the range of values obtained at sites elsewhere on Roberts Bank on the same date. However, the concentration of chlorophyll a at station RB6 was lower than at any of the other sites sampled.

TSS, NH4-N, NO3-N, NO2-N, and dissolved ortho-P were measured within the drainage ditch on October 6, 2004. Values for all of these parameters were much higher than those measured at any of the Roberts Bank stations (Tables 1-5), including those at station RB5, near the mouth of the ditch.

Although water in the ditch is nutrient-enriched relative to the waters of Roberts Bank, the ditch’s inflow did not appear to be affecting the water quality in the inter-causeway area on October 6, nor did it appear to be causing increased algal production (as measured by the concentration of chlorophyll a in the water.

3.3 Comparison of Roberts Bank Water Quality to Ambient Guidelines

Water quality objectives (WQO) or water quality guidelines exist for several of the parameters measured during the Roberts Bank water sampling program.

Twenty-four of the 99 DO measurements were below the chronic WQO of 8.0 mg/L (mean of 5 samples collected within a 30-d period) set by Swain et al. (1998), but none of the measurements were below the instantaneous minimum of 5.0 mg/L. Most of the DO measurements below 8.0 mg/L were taken from samples collected from at least 5 m depth at farshore stations, which reflects natural coastal conditions (Figure 10). Based on these measurements, harm to DO-sensitive species (e.g., salmonids) is not expected.

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For water temperatures of 15°C, salinity of 20 ppt, and pH of 8.0, the maximum allowable ammonia concentration is 9.8 mg/L and the allowable 30-d average concentration is 1.5 mg/L (BCMWLAP 1998). All measured ammonia-N concentrations were non-detectable or below half of the 30-d average guideline. Therefore, ammonia-related toxicity is not expected.

3.4 Comparison to Historical Data

Historical data for Roberts Bank and environs were available from data compilations conducted by Triton (2001) and Swain et al. (1998). All parameters for the present study were within the range reported for sampling stations at the Brandrith Pump Station (located between the Roberts Bank and BC Ferries jetties), Roberts Bank and Sturgeon Bank (Table 9). There are insufficient data to assess any long-term or seasonal changes in water quality.

3.5 Recommendations for Future Sampling

Monitoring to date has not identified any existing issues of concern regarding water quality on Roberts Bank. However, the focus of the monitoring program has been describing general water quality conditions on Roberts Bank as a whole, rather that examining any one particular area. Concern has been expressed about the potential for “eutrophic” conditions (i.e., oxygen depletion) to develop in the inter-causeway area as a result of the seasonal die-back of the extensive seagrass* beds. Stations RB1a and RB1b, although situated in the inter-causeway area, do not reflect conditions close to shore, and our single sample from inshore (Station RB6) was collected once only, in October. We therefore recommend that VPA commission a more detailed water sampling program in the inter-causeway area next summer, to determine if oxygen depletion is occurring as a result of eutrophication.

We also recommend that the existing water sampling program be continued at least until May, 2005, to ensure that a full year of data is obtained.

* The seagrass Zostera japonica, which is found in the intercauseway area, is an annual plant.

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4.0 REFERENCES

BCMWLAP (BC Ministry of Water, Land and Air Protection). 2003. British Columbia Field Sampling Manual – For Continuous Monitoring and the Collection of Air, Air-Emission, Water, Wastewater, Soil, Sediment, and Biological Samples. Queens Printer, Victoria, British Columbia.

BCMWLAP. 1998. British Columbia approved water quality guidelines (criteria): 1998 edition updated August 24 2001. Located at: http://wlapwww.gov.bc.ca/wat/wq/BCguidelines/approved.html.

Environment Canada. 1994. Guidance document on collection and preparation of sediments for physicochemical characterization and biological testing. Environmental Protection Series, Report EPS 1/RM/29. Environment Canada, Technology Development Directorate, Ottawa, ON. December 1994. 106 pp.

PSEP (Puget Sound Estuary Program). 1987. Recommended protocols for sampling and analyzing subtidal benthic macroinvertebrate assemblages in Puget Sound. Puget Sound Estuary Program. Prepared for U.S. Environmental Protection Agency, Seattle, WA. January 1987. 31 pp.

PSEP. 1997. Recommended guidelines for sampling marine sediment, water column and tissue in Puget Sound. Puget Sound Estuary Program. Prepared for U.S. Environmental Protection Agency, Seattle, WA and Puget Sound Water Quality Authority, Olympia, WA. April 1997. 51 pp.

Swain, L.G., D.G. Walton, B. Phippen, H. Lewis, S. Brown, G. Bamford, D. Newsom, and I. Lundman. 1998. Water quality assessment and objectives for the Fraser River from Hope to Sturgeon and Roberts Banks, first update, technical appendix. Ministry of Environment, Land and Parks, Province of British Columbia, Victoria, BC.

Tarbotton, M. and P.G. Harrison. 1996. A review of the recent physical and biological development of the southern Roberts Bank seagrass system 1950-1994. Prepared for the Roberts Bank Environmental Review Committee.

Triton (Triton Environmental Consultants). 2001. Roberts Bank cumulative environmental effects study: marine habitat study. Prepared by Triton Environmental Consultants, Richmond, BC, for Vancouver Port Authority, Vancouver, BC.

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5.0 LIMITATIONS

Standard of Care: Golder Associates Ltd. (Golder) has prepared this report in a manner consistent with that level of care and skill ordinarily exercised by members of the engineering and science professions currently practicing in British Columbia, subject to the time limits and physical constraints applicable to this report. No other warranty, express or implied, is made.

Basis and Use of the Report: This report has been prepared for the specific site, design objective, development and purpose described to Golder by the Client. The factual data, interpretations and recommendations pertain to a specific project as described in this report and are not applicable to any other project or site location. Any change of site conditions, purpose, development plans or if the project is not initiated within eighteen months of the date of the report may alter the validity of the report. Golder can not be responsible for use of this report, or portions thereof, unless Golder is requested to review and, if necessary, revise the report.

The information, recommendations and opinions expressed in this report are for the sole benefit of the Client. No other party may use or rely on this report or any portion thereof without Golder’s express written consent. Golder will consent to any reasonable request by the Client to approve the use of this report by other parties as Approved Users. The report, all plans, data, drawings and other documents as well as all electronic media prepared by Golder are considered its professional work product and shall remain the copyright property of Golder, who authorizes only the Client and Approved Users to make copies of the report, and only in such quantities as are reasonably necessary for the use of the report by those parties. The Client and Approved Users may not give, lend, sell, or otherwise make available the report or any portion thereof to any other party without the express written permission of Golder. The Client acknowledges that electronic media is susceptible to unauthorized modification, deterioration and incompatibility and therefore the Client can not rely upon the electronic media versions of Golder’s report or other work products.

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6.0 CLOSURE

EVS ENVIRONMENT CONSULTANTS A Member of the Golder Group of Companies

Prepared by: Reviewed by:

Barbara Wernick, M.Sc., R.P.Bio. Senior Environmental Scientist

Jay Hammond, M.Sc., R.P.Bio. Senior Fisheries Scientist

Paul McElligott, Ph.D., R.P.Bio. Senior Environmental Scientist

BW/PM/jae 04-1422-019 Z:\Data\Final\2004\1422\04-1422-019\REP 1129 2004 Water quality report.doc


FIGURES

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Figure 2: Temporal variation in dissolved oxygen concentrations at surface and depth locations at Roberts Bank, Delta, BC. (A: nearshore stations; B: farshore stations). Columns represent mean values for all stations at a given depth, and error bars indicate ranges of measured values.

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Figure 3: Temporal variation in temperature at surface and depth at Roberts Bank, Delta, BC. (A: nearshore stations; B: farshore stations). Columns represent mean values for all stations at a given depth, and error bars indicate ranges of measured values.

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Figure 4: Temporal variation in turbidity at surface and depth at Roberts Bank, Delta, BC (A: nearshore stations; B: farshore stations). Columns represent mean values for all stations at a given depth, and error bars indicate ranges of measured values.

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Figure 5: Temporal variation in total suspended solids (TSS) at surface and depth at Roberts Bank, Delta, BC (A: nearshore stations; B: farshore stations). Columns represent mean values for all stations at a given depth, and error bars indicate ranges of measured values.

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A

November 2004 - F - 6 - 04-1422-019


Figure 6: Temporal variation in salinity at surface and depth at Roberts Bank, Delta, BC (A: nearshore stations; B: farshore stations). Columns represent mean values for all stations at a given depth, and error bars indicate ranges of measured values.

0

5

10

15

20

25

30


Salin

ity (p

pt)

SurfaceDepth

0

5

10

15

20

25

30


Salin

ity (p

pt)

SurfaceDepth

B

A

November 2004 - F - 7 - 04-1422-019


Figure 7: Temporal variation in nutrients at depth at Roberts Bank, Delta, BC (A: nearshore stations; B: farshore stations). The column represents the mean value for all stations at a given depth, and the error bars indicate the range.

0.00

0.10

0.20

0.30

0.40

0.50


Nitr

ogen

/pho

spho

rus

(mg/

L)

AmmoniaNitrateNitriteOrtho-P

0.00

0.10

0.20

0.30

0.40

0.50


Nitr

ogen

/pho

spho

rus

(mg/

L)

AmmoniaNitrateNitriteOrtho-P

B

A

November 2004 - F - 8 - 04-1422-019


Figure 8: Temporal variation in chlorophyll a at depth at Roberts Bank, Delta, BC (A: nearshore stations; B: farshore stations). The column represents the mean value for all stations at a given depth, and the error bars indicate the range.

0.0

1.0

2.0

3.0

4.0

5.0

6.0


Chl

orop

hyll

a (µ

g/L)

0.0

1.0

2.0

3.0

4.0

5.0

6.0


Chlo

roph

yll a

(µg/

L)

B

A

November 2004 - F - 9 - 04-1422-019


Figure 9: Correlation between nutrient and chlorophyll a concentrations, Roberts Bank, Delta, BC.

0

0.01

0.02

0.03

0.04

0.05

0.06

0 1 2 3 4 5 6 7

Amm

onia

-N (m

g/L) 5 May 04

2 Jun 0430 Jun 0412 Aug 046 Oct 04

0

0.1

0.2

0.3

0.4

0.5

0.6

0 1 2 3 4 5 6 7

Nitra

te-N

(mg/

L) 5 May 042 Jun 0430 Jun 0412 Aug 046 Oct 04

0

0.01

0.02

0.03

0.04

0.05

0.06

0.07

0.08

0.09

0 1 2 3 4 5 6 7

Chlorophyll a (µg/L)

Orth

o-P

(mg/

L)

5 May 042 Jun 0430 Jun 0412 Aug 046 Oct 04

November 2004 - F - 10 - 04-1422-019


Figure 10: Correlation between dissolved oxygen concentrations and depth, Roberts Bank, Delta, BC (the grey lines represent the BC water quality objectives for dissolved oxygen).

0

5

10

15

20

25

30

35

400 2 4 6 8 10 12 14

Dissolved oxygen concentration (mg/L)

Dep

th (m

)

Chronic WQO

Instantaneousminimum WQO

♦ Nearshore station ∆ Farshore station


TABLES

November 2004 - T - 1 - 04-1422-019


Table 1: Results of in situ measurements and laboratory analyses of water samples collected from Roberts Bank, Delta, BC on May 5, 2004.

SAMPLE LOCATION

RB1A RB1B RB2A RB2B RB3A RB3B RB4A RB4B RB5A RB5B PARAMETER

SUR

FAC

E

DEP

TH

S UR

FAC

E

DEP

TH

S UR

FAC

E

DEP

TH

S UR

FAC

E

DEP

TH

SUR

FAC

E

DEP

TH

S UR

FAC

E

DEP

TH

SUR

FAC

E

DEP

TH

SUR

FAC

E

DEP

TH

S UR

FAC

E

DEP

TH

SUR

FAC

E

DEP

TH

Sample time (h) 0830 1000 1050 1130 1155 1215 1250 1315 1415 1446 Sample depth (m) 0.5 6 0.5 14.4 0.5 4.9 0.5 13.9 0.5 3.3 0.5 13.4 0.5 3.6 0.5 34.7 0.5 4.6 0.5 28.7 Dissolved oxygen (mg/L) 10.19 9.5 11.46 9.4 9.72 10.7 9.7 8.92 10.47 8.15 10.42 7.8 10.34 8.53 10.75 7.9 11.05 9.31 11.03 9.67 pH (relative pH units) 8.2 8.2 8.3 8.1 8.2 8.1 8.1 8.1 8.1 8.1 8.1 7.9 8.1 8.1 8.1 7.9 8.1 8.1 8.2 7.9 Temperature (°C) 12.4 12.4 13.1 11.4 12.7 11.5 13.2 11.9 13.2 12.8 13 10.9 13.6 12.5 11.9 12.2 11 11.3 11.8 10.5 Turbidity (FAU) 3 1 0 3 14 3 22 1 62 17 59 8 28 13 67 9 82 104 86 5 Salinity (ppt) 24 24.7 24.3 27.3 15.7 24.2 13.9 26.5 4.7 15.3 4.2 26.7 7.2 16.7 4.6 21.7 1.4 4.5 0.5 24.6 Total suspended solids (mg/L) - 18.3 - 13.6 - 12.9 - 14.3 - 26.3 - 12.9 - 8.9 - 12.9 - 170 - 32.3 Ammonia-N (mg/L) - 0.05 - 0.044 - 0.044 - 0.045 - 0.051 - 0.042 - 0.043 - 0.051 - 0.064 - 0.053 Nitrate-N (mg/L) - 0.061 - 0.192 - 0.15 - 0.19 - 0.129 - 0.258 - 0.123 - 0.236 - 0.118 - 0.235 Nitrite-N (mg/L) - <0.010 - <0.010 - <0.010 - <0.010 - <0.010 - <0.010 - <0.010 - <0.010 - <0.010 - <0.010 Dissolved ortho-P (mg/L) - 0.0201 - 0.0475 - 0.0436 - 0.0505 - 0.0309 - 0.06 - 0.0298 - 0.0495 - 0.0174 - 0.0545 Chlorophyll a (µg/L) - 0.751 - 0.684 - 1.2 - 1.06 - 0.87 - 0.631 - 0.622 - 0.461 - 1.01 - -

November 2004 - T - 2 - 04-1422-019


Table 2: Results of in situ measurements and laboratory analyses of water samples collected from Roberts Bank, Delta, BC on June 2-3, 2004.

SAMPLE LOCATION


SUR

FAC

E

DEP

TH

S UR

FAC

E

DEP

TH

S UR

FAC

E

DEP

TH

S UR

FAC

E

DEP

TH

S UR

FAC

E

DEP

TH

S UR

FAC

E

DEP

TH

S UR

FAC

E

DEP

TH

S UR

FAC

E

DEP

TH

S UR

FAC

E

DEP

TH

S UR

FAC

E

DEP

TH

Sample time 0825 (Jun 2) 0850 (Jun 2) 0930 (Jun 2) 1005 (Jun 2) 0814 (Jun 3) 0845 (Jun 3) 1132 (Jun 3) 1210 (Jun 3) 1005 (Jun 3) 1040 (Jun 3) Sample depth (m) 0.5 - 0.5 - 0.5 - 0.5 - 0.5 4.6 0.5 12.1 0.5 2.6 0.5 36.2 0.5 4 0.5 22.1 Dissolved oxygen (mg/L) 10.02 8.3 11.01 8.2 9.41 8.3 8.96 7.9 9.2 8.7 9.1 7.4 9.1 9.3 9.2 7.4 9.3 9.1 9.2 7.6 pH (relative pH units) 8.2 7.9 8.3 7.9 8.2 8 8.1 7.9 8.1 8.1 8 7.8 8 8 7.8 7.8 7.8 7.9 7.8 7.8 Temperature (°C) 13.8 11.4 14.7 10.5 15.1 12.4 15.4 11.5 13.5 12.6 13.4 10 14.7 15.2 15.1 10.1 12.4 12.5 12.3 10.5 Turbidity (FAU) 0 0 3 0 18 5 18 0 20 11 14 85 0 0 11 0 39 85 28 9 Salinity (ppt) 21.2 27.3 21.2 27.5 15 24.1 15 26.8 7.3 22.5 14.2 27.8 12.5 12.8 8.5 27.1 9.5 10.3 9.6 27.4 Total suspended solids (mg/L) - 12.8 - 16.8 - 32.1 - 24.1 - 24.1 - 17.5 - 18.8 - 32.1 - 260 - 61.5 Ammonia-N (mg/L) - 0.032 - 0.027 - <0.020 - <0.020 - <0.020 - <0.020 - 0.031 - <0.020 - 0.037 - 0.022 Nitrate-N (mg/L) - 0.079 - 0.215 - 0.075 - 0.168 - 0.122 - 0.258 - 0.082 - 0.284 - 0.121 - 0.483 Nitrite-N (mg/L) - <0.020 - <0.020 - <0.020 - <0.020 - <0.020 - <0.020 - <0.020 - <0.020 - <0.020 - <0.020 Dissolved ortho-P (mg/L) - 0.0498 - 0.0698 - 0.0355 - 0.0519 - 0.0425 - 0.0787 - 0.0331 - 0.0695 - 0.0288 - 0.0723 Chlorophyll a (µg/L) - 1.19 - 0.702 - 4.5 - 0.619 - 1.27 - 0.818 - 0.235 - 0.34 - 0.295 - 0.506

November 2004 - T - 3 - 04-1422-019


Table 3: Results of in situ measurements and laboratory analyses of water samples collected from Roberts Bank, Delta, BC on June 30, 2004.

SAMPLE LOCATION


SUR

FAC

E

DEP

TH

S UR

FAC

E

DEP

TH

S UR

FAC

E

DEP

TH

S UR

FAC

E

DEP

TH

S UR

FAC

E

DEP

TH

S UR

FAC

E

DEP

TH

S UR

FAC

E

DEP

TH

S UR

FAC

E

DEP

TH

S UR

FAC

E

DEP

TH

S UR

FAC

E

DEP

TH

Sample time 0730 0750 0820 0850 0930 0943 1030 1046 1130 1218 Sample depth (m) 0.5 2.5 0.5 14 0.5 5 0.5 - 0.5 3.5 0.5 9.2 0.5 3.8 0.5 36 0.5 3.6 0.5 31 Dissolved oxygen (mg/L) 8.2 - 8.5 7.67 8.4 7.89 8.3 7.9 8.1 8.1 8.1 7.9 9.5 8.4 8.2 6.9 8.4 8.5 8.4 6.9 pH (relative pH units) 8.2 - 8.2 7.9 8.1 8.0 8.0 8.0 8.1 8.1 8.0 7.9 8.0 8.0 8.1 7.9 8.1 8.1 8.0 7.8 Temperature (°C) 16.3 - 15.9 11.9 16.2 14.9 15.6 12.4 17.8 18.0 18.1 13.2 18.3 17.8 17.7 11.0 17.8 18.2 18.0 11.7 Turbidity (FAU) 3 - 0 0 3 4 5 3 45 47 49 5 30 18 37 8 46 47 44 11 Salinity (ppt) 25.3 - 24.4 27.6 17.3 23.1 20.6 27.1 8.0 8.1 6.7 26.7 6.4 11.3 7.5 28.0 2.4 2.4 1.7 28.0 Total suspended solids (mg/L) - 22.0 - 28.7 - 8.0 - 23.3 - 43.3 - 14.7 - 20.0 - 39.3 - 40.7 - 44.7 Ammonia-N (mg/L) - 0.022 - 0.025 - 0.023 - <0.020 - 0.024 - <0.020 - 0.025 - 0.024 - 0.036 - <0.020 Nitrate-N (mg/L) - 0.021 - 0.26 - 0.094 - 0.213 - 0.054 - 0.204 - 0.085 - 0.298 - 0.079 - 0.274 Nitrite-N (mg/L) - <0.020 - <0.020 - <0.020 - <0.020 - <0.020 - <0.020 - <0.020 - <0.020 - <0.020 - <0.020 Dissolved ortho-P (mg/L) - 0.0541 - 0.07 - 0.0476 - 0.0649 - 0.0414 - 0.0702 - 0.0207 - 0.0737 - 0.0134 - 0.0816 Chlorophyll a (µg/L) - 2.12 - 1.19 - 1.4 - 1.46 - 1.15 - 1.1 - 0.985 - 0.462 - 0.363 - 0.306

November 2004 - T - 4 - 04-1422-019


Table 4: Results of in situ measurements and laboratory analyses of water samples collected from Roberts Bank, Delta, BC on August 12, 2004.

SAMPLE LOCATION


SUR

FAC

E

DEP

TH

S UR

FAC

E

DEP

TH

SUR

FAC

E

DEP

TH

SUR

FAC

E

DEP

TH

S UR

FAC

E

DEP

TH

S UR

FAC

E

DEP

TH

S UR

FAC

E

DEP

TH

S UR

FAC

E

DEP

TH

SUR

FAC

E

DEP

TH

SUR

FAC

E

DEP

TH

Sample time 0800 0845 0915 0945 1005 1025 1110 1135 1235 1255 Sample depth (m) - - - - - - - - - - - - - - - - - - - - Dissolved oxygen (mg/L) 7.83 7.54 8.71 6.65 8.51 7.95 8.89 7.45 8.21 8.27 8.22 7.52 8.64 8.66 8.21 6.09 8.09 8.31 8.19 6.27 pH (relative pH units) 8.1 8.0 8.1 7.9 8.2 7.9 8.2 7.9 8.1 8.0 8.0 7.8 8.1 8.1 8.2 7.7 8.1 8.0 8.1 8.0 Temperature (°C) 17.1 16.1 18.0 16.5 21.1 16.4 20.7 14.1 20.4 19.6 20.0 13.5 19.5 17.7 20.6 11.7 19.4 18.1 19.5 11.6 Turbidity (FAU) 3 6 5 15 16 6 12 6 10 10 13 0 20 10 13 0 20 9 17 23 Salinity (ppt) 22.8 24.7 15.3 27.5 7.8 24.4 10.2 27.5 9.3 12.3 8.7 26.7 8.8 18.8 7.2 28.1 7.4 16.0 7.6 27.9 Total suspended solids (mg/L) - 3.0 - 37.7 - 12.3 - 15.0 - 8.3 - 11.0 - 7.7 - 11.7 - 8.3 - 61.0 Ammonia-N (mg/L) - 0.045 - 0.048 - 0.025 - 0.020 - <0.020 - <0.020 - <0.020 - 0.020 - <0.020 - <0.020 Nitrate-N (mg/L) - <0.05 - 0.198 - 0.097 - 0.194 - <0.05 - 0.219 - <0.05 - 0.084 - 0.068 - 0.282 Nitrite-N (mg/L) - <0.05 - <0.05 - <0.05 - <0.05 - <0.05 - <0.05 - <0.05 - <0.05 - <0.05 - <0.05 Dissolved ortho-P (mg/L) - 0.039 - 0.0668 - 0.0401 - 0.049 - 0.0207 - 0.0529 - 0.0252 - 0.0657 - 0.0206 - 0.0673 Chlorophyll a (µg/L) - 1.57 - 2.18 - 3.25 - 3.94 - 1.15 - 1.36 - 3.42 - 0.26 - 1.47 - 0.611

November 2004 - T - 5 - 04-1422-019


Table 5: Results of in situ measurements and laboratory analyses (physical and nutrient parameters) of water samples collected from Roberts Bank, Delta, BC on September 29 and October 6, 2004.

SAMPLE LOCATION RB1A RB1B RB2A RB2B RB3A RB3B RB4A RB4B RB5A RB5B

PARAMETERS

Surf

ace

Dep

th

Surf

ace

Dep

th

Surf

ace

Dep

th

Surf

ace

Dep

th

Surf

ace

Dep

th

Surf

ace

Dep

th

Surf

ace

Dep

th

Surf

ace

Dep

th

Surf

ace

Dep

th

Surf

ace

Dep

th

RB6 RB (DITCH)

Sample time 0930 (Sept 29) 1006 (Sept 29) 0730 (Oct 6) 1000 (Oct 6) 1230 (Oct 6) 1300 (Oct 6) 1430 (Oct 6) 1500 (Oct 6) 1630 (Oct 6) 1700 (Oct 6) 0815 (Oct 6) 1135 (Oct 6) Sample depth (m) 0.5 1.5 0.5 12 0.5 4 0.5 11 0.5 4 0.5 11 0.5 4.6 0.5 - 0.5 6.5 0.5 - 1.3 0.5 Dissolved oxygen (mg/L) 8.8 8.6 9.1 8.7 11.39 10.26 10.00 6.63 9.60 7.82 10.77 7.05 8.79 9.70 10.58 5.95 9.18 10.54 8.52 9.34 9 - pH (relative pH units) 7.9 7.8 7.8 7.9 8.3 7.8 8.3 7.8 8.1 8.1 8.1 7.9 8.2 8.1 8.1 8.0 8.2 8.1 8.2 8.1 7.2 - Temperature (°C) 11.9 12.1 12.0 12.0 13.9 13.1 14.3 12.4 13.7 13.4 13.4 11.9 13.3 13.3 13.2 11.0 13.2 13.3 13.2 11.4 12.2 - Turbidity (FAU) - - - - 3 4 1 2 2 - 2 2 0 2 0 - 0 4 0 0 - - Salinity (ppt) 27.4 28.0 28.1 28.1 25.8 25.8 26.2 28.0 26.3 27.4 26.4 28.2 26.6 26.6 26.5 29.0 16.2 26.3 18.1 28.3 28.8 - Total suspended solids (mg/L) - 26.7 20 17.3 - 15.7 17.1 27.1 - 13.7 15.7 13.7 - 15.7 - 20.4 - 17.1 - 81.7 24 28.7 Ammonia-N (mg/L) - 0.0380 0.0210 0.0200 - 0.0090 0.0170 0.0130 - 0.0100 0.0110 0.0110 - 0.0150 - <0.005 - 0.0090 - <0.005 <0.02 0.307 Nitrate-N (mg/L) - 0.2 0.17 0.21 - 0.14 <0.10 0.21 - <0.10 <0.10 0.24 - <0.10 - 0.3 - <0.10 - 0.27 0.16 0.25 Nitrite-N (mg/L) - <0.020 <0.020 <0.020 - <0.020 <0.020 <0.020 - <0.020 <0.020 <0.020 - <0.020 - <0.020 - <0.020 - <0.020 <0.02 0.049 Dissolved ortho-P (mg/L) - 0.0675 0.057 0.0579 - 0.0362 0.0144 0.0487 - 0.0320 0.0194 0.0597 - 0.0330 - 0.0682 - 0.0289 - 0.0643 0.0557 0.123 Chlorophyll a (µg/L) - 0.841 0.432 0.694 - 4.00 5.96 1.21 - - 3.09 1.27 - 4.10 - 0.506 - 5.52 - 0.404 0.385 0.554

November 2004 - T - 6 - 04-1422-019


Table 6: Results of in situ measurements and laboratory analyses of water samples at various depths collected from Roberts Bank, Delta, BC on September 29 and October 6, 2004.

SAMPLE LOCATION

RB1b RB2b RB3b PARAMETER

Surf

ace

2 m

4 m

6 m

8 m

10 m

12 m

Surf

ace

2.5

m

5 m

7 m

9 m

11 m

Surf

ace

2.5

m

4.5

m

7 m

9 m

11 m

Sample time 1006 (Sept 29) 1000 (Oct 6) 1300 (Oct 6) Sample depth (m) 0.5 2.0 4.0 6.0 8.0 10.0 12.0 0.5 2.5 5.0 7.0 9.0 11.0 0.5 2.5 4.5 7.0 9.0 11.0 Dissolved oxygen (mg/L) 9.1 8.8 8.8 8.7 8.7 8.7 8.7 10.00 10.39 9.81 9.49 6.85 6.63 10.77 9.35 8.90 7.55 6.97 7.05 pH (relative pH units) 7.8 7.8 7.8 7.8 7.9 7.9 7.9 8.3 8.3 8.3 7.8 8.0 7.8 8.1 8.1 8.1 7.9 7.9 7.9 Temperature (°C) 12.0 12.0 12.1 12.0 12.1 12.1 12.0 14.3 13.6 14.0 13.7 12.3 12.4 13.4 13.5 12.7 12.1 11.8 11.9 Turbidity (FAU) - - - - - - - 1 0 3 2 3 2 2 2 1 1 3 2 Salinity (ppt) 28.1 28.1 28.1 28.1 28.0 28.1 28.1 26.2 26.1 26.0 26.3 27.7 28.0 26.4 26.4 27.2 27.7 28.1 28.2 Total suspended solids (mg/L) 20.0 - - 27.3 - - 17.3 17.1 - - 20.4 - 27.1 15.7 - - 16.4 - 13.7 Ammonia-N (mg/L) 0.021 - - 0.022 - - 0.020 0.0170 - - 0.0130 - 0.0130 0.0110 - - 0.0150 - 0.0110Nitrate-N (mg/L) 0.17 - - 0.19 - - 0.21 <0.10 - - <0.10 - 0.21 <0.10 - - 0.22 - 0.24 Nitrite-N (mg/L) <0.020 - - <0.020 - - <0.020 <0.020 - - <0.020 - <0.020 <0.020 - - <0.020 - <0.020Dissolved ortho-P (mg/L) 0.0565 - - 0.0565 - - 0.0579 0.0144 - - 0.0209 - 0.0487 0.0194 - - 0.0546 - 0.0597Chlorophyll a (µg/L) 0.432 - - 0.646 - - 0.694 5.96 - - 5.16 - 1.21 3.09 - - 1.83 - 1.27

November 2004 - T - 7 - 04-1422-019


Table 7: Results of in situ measurements and laboratory analyses of water samples at various depths collected from Roberts Bank, Delta, BC on September 29 and October 6, 2004.

STATION

RB1B RB2B RB3B PARAMETER

BC WQG

(AQUATIC LIFE)*

RB1A SURFACE MIDDLE DEEP



RB4A RB4B RB5A RB5B RB6 RBD

(DITCH)

Time Sampled 9:30 10:06 10:06 10:06 8:45 10:00 10:00 10:00 12:30 13:00 13:00 13:00 - - 14:30 14:30 8:15 11:35

Depth (m) 1.5 0.3 6.0 12.0 4.0 0.5 7.0 11.0 4.0 0.5 7.0 11.0 4.6 - 6.5 - 0.5 0.5

Polycyclic Aromatic Hydrocarbons

Acenaphthene 6 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050

Acenaphthylene n/a <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050

Acridine 0.05 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050

Anthracene 0.1 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050

Benz(a)anthracene 0.1 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050

Benzo(a)pyrene 0.01 <0.000010 <0.000010 <0.000010 <0.000010 <0.000010 <0.000010 <0.000010 <0.000010 <0.000010 <0.000010 <0.000010 <0.000010 <0.000010 <0.000010 <0.000010 <0.000010 <0.000010 <0.000010

Benzo(b)fluoranthene n/a <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050

Benzo(g,h,i)perylene n/a <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050

Benzo(k)fluoranthene n/a <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050

Chrysene n/a <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050

Dibenz(a,h)anthracene n/a <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050

Fluoranthene 0.2 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050

Fluorene 12 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050

Indeno(1,2,3-c,d)pyrene n/a <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050

Naphthalene 1 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050

Phenanthrene 0.3 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050

Pyrene 0.02 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050

Quinoline n/a <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050 <0.000050

*BCMWLAP 1998

November 2004 - T - 8 - 04-1422-019


Table 8: QA/QC results for laboratory analyses of field duplicate water samples collected from Roberts Bank, Delta, BC.

PARAMETER DATE RB4B RB4B (DUPLICATE) RPD§

5-May-04 12.9 11.6 - 2-Jun-04 32.1 6.1 - 30-Jun-04 39.3 6.7 - 12-Aug-04 11.7 10.3 -

TSS (mg/L)

6-Oct-04 20.4 14.4 -

5-May-04 0.051 0.04 - 2-Jun-04 <0.020 <0.020 - 30-Jun-04 0.024 0.026 - 12-Aug-04 0.020 <0.020 -

NH4-N (mg/L)

6-Oct-04 <0.005 <0.005 -

5-May-04 0.236 0.236 - 2-Jun-04 0.284 0.26 - 30-Jun-04 0.298 0.336 - 12-Aug-04 0.084 0.278 -

NO3-N (mg/L)

6-Oct-04 0.30 0.29 -

5-May-04 <0.010 <0.010 - 2-Jun-04 <0.020 <0.020 - 30-Jun-04 <0.020 <0.020 - 12-Aug-04 <0.05 <0.05 -

NO2-N (mg/L)

6-Oct-04 <0.020 <0.020 -

5-May-04 0.0495 0.067 30.0 2-Jun-04 0.0695 0.0697 0.3 30-Jun-04 0.0737 0.0675 8.8 12-Aug-04 0.0657 0.0662 0.8

Diss. Ortho-P (mg/L)

6-Oct-04 0.0682 0.0689 1.0

5-May-04 0.461 - - 2-Jun-04 0.34 - - 30-Jun-04 0.462 - - 12-Aug-04 0.260 0.202 25.1

Chl. a (µg/L)

6-Oct-04 0.506 0.330 42.1

§ RPD – relative percent difference Italicized values are less than five times the method detection limit

November 2004 - T - 9 - 04-1422-019


Table 9: Comparison of laboratory analyses and in situ measurements of water quality at Roberts Bank, Delta, BC (May – October), shown as mean ± standard deviation, with historical data.

MAY 5, 2004 JUNE 2-3, 2004 JUNE 30, 2004 AUGUST 12, 2004 OCTOBER 6, 2004

PARAMETER SURFACE DEPTH SURFACE DEPTH SURFACE DEPTH SURFACE DEPTH SURFACE DEPTH

BRANDRITH PUMP

STATION†

BC MWLAP‡

Dissolved oxygen (mg/L) 10.5 ± 0.6 9.0 ± 0.9 9.5 ± 0.6 8.2 ± 0.7 8.4 ± 0.4 7.8 ± 0.6 8.4 ± 0.3 7.5 ± 0.9 9.7 ± 1.0 8.5 ± 1.6 - 6.3 – 10.8

pH (relative pH units) 8.15 ± 0.07 8.05 ± 0.11 8.03 ± 0.18 7.91 ± 0.10 8.08 ± 0.08 7.97 ± 0.10 8.12 ± 0.06 7.93 ± 0.12 8.1 ± 0.2 8.0 ± 0.1 - 7.3 – 7.5

Temperature (°C) 12.6 ± 0.8 11.7 ± 0.7 14.0 ± 1.1 11.7 ± 1.6 17.2 ± 1.0 14.3 ± 2.9 19.63 ± 1.3 15.53 ± 2.7 13.21 ± 0.75 12.4 ± 0.9 - -

Turbidity (FAU) 42.3 ± 32.5 16.4 ± 31.2 15.1 ± 12.5 19.5 ± 34.8 26.2 ± 20.9 15.9 ± 18.4 12.9 ± 5.7 8.5 ± 6.8 1 ±1.2 2 ± 1.5 - -

Salinity (ppt) 10.1 ± 8.9 21.2 ± 7.2 13.4 ± 4.9 23.4 ± 6.5 12.0 ± 9.0 20.3 ± 10.1 10.5 ± 4.9 23.4 ± 5.7 24.8 ± 4.09 27.6 ± 1 - -

Total suspended solids (mg/L) 32.2 ± 48.9 50.0 ± 75.0 28.5 ± 12.9 17.6 ± 17.9 24.9 ± 21 - -

Ammonia-N (mg/L) 0.049 ± 0.007 0.025 ± 0.006 0.024 ± 0.004 0.026 ± 0.011 0.014 ± 0.01 <0.05 - 0.43 0.03 – 0.64

Nitrate-N (mg/L) 0.169 ± 0.063 0.189 ± 0.128 0.158 ± 0.102 0.129 ± 0.086 0.187 ± 0.073 <0.05 0.06 – 2.94

Nitrite-N (mg/L) <0.010 <0.020 <0.020 <0.050 <0.020 - 0.008 – 0.032

Dissolved ortho-P (mg/L) 0.040 ± 0.015 0.053 ± 0.018 0.054 ± 0.023 0.045 ± 0.019 0.049 ± 0.016 0.07 - 0.15 0.058 – 0.15

Chlorophyll a (µg/L) 0.81 ± 0.24 1.05 ± 1.26 1.05 ± 0.56 1.92 ± 1.24 2.06 ± 1.9 - -

Notes: † Range of values reported in Triton (2001) for samples collected by the Corporation of the City of Delta. ‡ Range of values reported in Swain et al. (1998) for samples collected by the provincial government, AIM Ecological Consultants and the Greater Vancouver Regional District.


APPENDIX I

LABORATORY REPORTS FOR WATER QUALITY RESULTS

CHEMICAL ANALYSIS REPORT

Date: May 25, 2004

ALS File No. U3225

Report On: 03-1110-03 Roberts BankWater Analysis

Report To: EVS Environment Consultants195 Pemberton AvenueNorth Vancouver, BCV7P 2R4

Received: May 6, 2004

ALS ENVIRONMENTALper:

Frederick Chen, B.Sc. - Section CoordinatorCan Dang, B.Sc. - Project Chemist

A Campbell Brothers Limited Company

ALS CANADA LTD.1988 Triumph Street, Vancouver, BC Canada V5L 1K5Phone: 604-253-4188 Fax: 604-253-6700 Website: www.alsenviro.com


Page 2 of 9

File No. U3225

RESULTS OF ANALYSIS - Seawater

Sample ID RB1a RB1b RB2a RB2b RB3a

Sample Date 04-05-04 04-05-04 04-05-04 04-05-04 04-05-04Sample Time 08:30 10:00 10:50 11:30 11:55ALS ID 1 2 3 4 5

Physical Tests Total Suspended Solids 18.3 13.6 12.9 14.3 26.3

Nutrients Ammonia Nitrogen N 0.050 0.044 0.044 0.045 0.051 Nitrate Nitrogen N 0.061 0.192 0.150 0.190 0.129 Nitrite Nitrogen N <0.010 <0.010 <0.010 <0.010 <0.010 Dissolved ortho-Phosphate P 0.0201 0.0475 0.0436 0.0505 0.0309

< = Less than the detection limit indicated. Results are expressed as milligrams per litre except where noted.

1

1


Page 3 of 9

File No. U3225


Sample ID RB3b RB4a RB4b RB10b RB5a


Physical Tests Total Suspended Solids 12.9 8.9 12.9 11.6 170

Nutrients Ammonia Nitrogen N 0.042 0.043 0.051 0.040 0.064 Nitrate Nitrogen N 0.258 0.123 0.236 0.236 0.118 Nitrite Nitrogen N <0.010 <0.010 <0.010 <0.010 <0.010 Dissolved ortho-Phosphate P 0.0600 0.0298 0.0495 0.0670 0.0174


1

1


Page 4 of 9

File No. U3225


Sample ID RB5b

Sample Date 04-05-04Sample Time 14:45ALS ID 11

Physical Tests Total Suspended Solids 32.3

Nutrients Ammonia Nitrogen N 0.053 Nitrate Nitrogen N 0.235 Nitrite Nitrogen N <0.010 Dissolved ortho-Phosphate P 0.0545


1

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Page 5 of 9

File No. U3225

RESULTS OF ANALYSIS - Filter



Organic Parameters Chlorophyll a 0.751 0.684 1.20 1.06 0.870

< = Less than the detection limit indicated. Chlorophyll results are expressed as micrograms per litre.

1

1


Page 6 of 9

File No. U3225


Sample ID RB3b RB4a RB5a RB4b

Sample Date 04-05-04 04-05-04 04-05-04 04-05-04Sample Time 12:15 12:50 14:15 13:15ALS ID 17 18 19 20

Organic Parameters Chlorophyll a 0.631 0.622 1.01 0.461

< = Less than the detection limit indicated. Chlorophyll results are expressed as micrograms per litre.

1

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Page 7 of 9

File No. U3225

Appendix 1 - QUALITY CONTROL - Replicates

Seawater RB4a RB4a

04-05-04 QC #12:50 385493

Nutrients Ammonia Nitrogen N 0.043 0.047 Dissolved ortho-Phosphate P 0.0298 0.0299

< = Less than the detection limit indicated.Results are expressed as milligrams per litre except where noted.

1

1


File No. U3225

Page 8 of 9

Appendix 2 - METHODOLOGY

Outlines of the methodologies utilized for the analysis of the samples submitted are as follows

Solids in Water

This analysis is carried out using procedures adapted from APHA Method 2540 "Solids". Solids are determined gravimetrically. Total dissolved solids (TDS) and total suspended solids (TSS) are determined by filtering a sample through a glass fibre filter, TDS is determined by evaporating the filtrate to dryness at 180 degrees celsius, TSS is determined by drying the filter at 104 degrees celsius. Total solids are determined by evaporating a sample to dryness at 104 degrees celsius. Fixed and volatile solids are determined by igniting a dried sample residue at 550 degrees celsius.

Recommended Holding Time: Sample: 7 days Reference: APHA For more detail see ALS Environmental "Collection & Sampling Guide"

Ammonia in Water by Selective Ion Electrode

This analysis is carried out, on sulphuric acid preserved samples, using procedures adapted from APHA Method 4500-NH3 "Nitrogen (Ammonia)". Ammonia is determined using an ammonia selective electrode.


Dissolved Anions in Water by Ion Chromatography

This analysis is carried out using procedures adapted from APHA Method 4110 "Determination of Anions by Ion Chromatography" and EPA Method 300.0 "Determination of Inorganic Anions by Ion Chromatography". Anions are determined by filtering the sample through a 0.45 micron membrane filter and injecting the filtrate onto a Dionex IonPac AG17 anion exchange column with a hydroxide eluent stream. Anions routinely determined by this method include: bromide, chloride, fluoride, nitrate, nitrite and sulphate.

Recommended Holding Time: Sample: 28 days (bromide, chloride, fluoride, sulphate) Sample: 2 days (nitrate, nitrite) Reference: APHA and EPA For more detail see ALS Environmental "Collection & Sampling Guide"


File No. U3225

Page 9 of 9

Appendix 2 - METHODOLOGY - Continued

Phosphate in Water

This analysis is carried out using procedures adapted from APHA Method 4500-P "Phosphorus". All forms of phosphate are determined by the ascorbic acid colourimetric method. Dissolved ortho-phosphate (dissolved reactive phosphorous) is determined by direct measurement. Total phosphate (total phosphorous) is determined after persulphate digestion of a sample. Total dissolved phosphate (total dissolved phosphorous) is determined by filtering a sample through a 0.45 micron membrane filter followed by persulfate digestion of the filtrate.

Recommended Holding Time: Sample: 2 days Reference: EPA For more detail see ALS Environmental "Collection & Sampling Guide"

Chlorophyll and Pheopigments by Fluorometry

This analysis is carried out using procedures adapted from APHA Method 10200 H. "Chlorophyll" and USEPA Method 445. The sample is filtered using either a glass fiber filter or a 0.45 micron Membrane filter. The pigments are extracted from the filter with 90% aqueuos acetone. For chlorophyl a analysis the extract is read using a fluorometer. For pheopigments the extract is first acidified then read. This method not subject to interferences from chlorophyll b.

Recommended Holding Time: Sample: 1-2 days before filtering Filter: 28 days Reference: APHA For more detail see ALS Environmental "Collection & Sampling Guide"

Results contained within this report relate only to the samples as submitted.

This Chemical Analysis Report shall only be reproduced in full, except with the written approval of ALS Environmental.

End of Report


Date: June 30, 2004

ALS File No. U4155r

Report On: 03-1110-03 Water Analysis


Received: June 4, 2004


Frederick Chen, B.Sc. - Section CoordinatorCan Dang, B.Sc. - Project Chemist




File No. U4155r

Page 2 of 10

REMARKS

Please note that the sampling dates have been revised to reflect the correctdates.


Page 3 of 10

File No. U4155r





Remarks regarding the analyses appear at the beginning of this report.Results are expressed as milligrams per litre except where noted.< = Less than the detection limit indicated. Chlorophyll a results are pressed as micrograms per filter.

1

1


Page 4 of 10

File No. U4155r


Sample ID RB3b RB5a RB5b RB4a RB4b



Remarks regarding the analyses appear at the beginning of this report.Results are expressed as milligrams per litre except where noted.< = Less than the detection limit indicated. Chlorophyll a results are pressed as micrograms per filter.

1

1


Page 5 of 10

File No. U4155r





Nutrients Ammonia Nitrogen N 0.032 0.027 <0.020 <0.020 <0.020 Nitrate Nitrogen N 0.079 0.215 0.075 0.168 0.122 Nitrite Nitrogen N <0.020 <0.020 <0.020 <0.020 <0.020 Dissolved ortho-Phosphate P 0.0498 0.0698 0.0355 0.0519 0.0425

Remarks regarding the analyses appear at the beginning of this report.Results are expressed as milligrams per litre except where noted.< = Less than the detection limit indicated.


Page 6 of 10

File No. U4155r




Physical Tests Total Suspended Solids 17.5 18.8 32.1 6.1 260

Nutrients Ammonia Nitrogen N <0.020 0.031 <0.020 <0.020 0.037 Nitrate Nitrogen N 0.258 0.082 0.284 0.260 0.121 Nitrite Nitrogen N <0.020 <0.020 <0.020 <0.020 <0.020 Dissolved ortho-Phosphate P 0.0787 0.0331 0.0695 0.0697 0.0288



Page 7 of 10

File No. U4155r


Sample ID RB5b

Sample DateSample TimeALS ID 21


Nutrients Ammonia Nitrogen N 0.022 Nitrate Nitrogen N 0.483 Nitrite Nitrogen N <0.020 Dissolved ortho-Phosphate P 0.0723



Page 8 of 10

File No. U4155r

Appendix 1 - QUALITY CONTROL - Replicates

Seawater RB2b RB2b

04-05-02 QC #10:05 389287

Physical Tests Total Suspended Solids 24.1 33.5

Nutrients Ammonia Nitrogen N <0.020 <0.020 Nitrate Nitrogen N 0.168 0.171 Nitrite Nitrogen N <0.020 <0.020 Dissolved ortho-Phosphate P 0.0519 0.0517



File No. U4155r

Page 9 of 10






Solids in Water







File No. U4155r

Page 10 of 10





Phosphate in Water





End of Report


Date: REPLACED

ALS File No. U5176

Report On: 03-1110-03 Roberts BankWater Analysis


Received: July 2, 2004


Frederick Chen, B.Sc. - Section CoordinatorAndre Langlais, M.Sc. - Project Chemist




Page 2 of 8

File No. U5176



Sample Date 04-06-30 04-06-30 04-06-30 04-06-30 04-06-30ALS ID 1 2 3 4 5


Nutrients Ammonia Nitrogen N 0.022 0.025 0.023 <0.020 0.024 Nitrate Nitrogen N 0.021 0.260 0.094 0.213 0.054 Nitrite Nitrogen N <0.020 <0.020 <0.020 <0.020 <0.020 Dissolved ortho-Phosphate P 0.0541 0.0700 0.0476 0.0649 0.0414

Results are expressed as milligrams per litre except where noted.< = Less than the detection limit indicated.


Page 3 of 8

File No. U5176





Nutrients Ammonia Nitrogen N <0.020 0.025 0.024 0.026 0.036 Nitrate Nitrogen N 0.204 0.085 0.298 0.336 0.079 Nitrite Nitrogen N <0.020 <0.020 <0.020 <0.020 <0.020 Dissolved ortho-Phosphate P 0.0702 0.0207 0.0737 0.0675 0.0134



Page 4 of 8

File No. U5176


Sample ID RB5b

Sample Date 04-06-30ALS ID 11


Nutrients Ammonia Nitrogen N <0.020 Nitrate Nitrogen N 0.274 Nitrite Nitrogen N <0.020 Dissolved ortho-Phosphate P 0.0816



Page 5 of 8

File No. U5176







Page 6 of 8

File No. U5176


Sample ID RB3b RB4a RB4b RB5a Rb5b





File No. U5176

Page 7 of 8



Solids in Water










File No. U5176

Page 8 of 8


Phosphate in Water








End of Report

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