North San Francisco Bay Selenium Characterization Study – Draft Final Report

Prepared by Tetra Tech, Inc. on behalf of WSPA A-1

Appendix A

San Francisco Bay Selenium 

Sample Locations

North San Francisco Bay Selenium Characterization Study – Draft Final Report

Prepared by Tetra Tech, Inc. on behalf of WSPA A-3

Table A-1

Dry Weather 2010: Transect Sample Dates and Locations

Sample ID Date Type Latitude1 Longitude1

Field Blank 8-Sep-10 QA – –

T-1 8-Sep-10 Transect 37°49'09" N

(37°49'24" N)2 122°23'38" W

(122°28'16" W)2

T-2 8-Sep-10 Transect 37°51'10" N 122°24'40" W

T-3 8-Sep-10 Transect 37°58'48" N 122°25'23" W

T-4 8-Sep-10 Transect 38°01'55" N 122°22'05" W

T-5 8-Sep-10 Transect 38°03'23" N 123°17'49" W

T-6 8-Sep-10 Transect 38°03'41" N 122°15'17" W

T-7 8-Sep-10 Transect 38°03'38" N 122°12'48" W

T-8 8-Sep-10 Transect 38°02'30" N 122°10'09" W

T-9 8-Sep-10 Transect 38°02'18" N 122°07'42" W

T-10 8-Sep-10 Transect 38°02'40" N 122°06'26" W

T-11 8-Sep-10 Transect 38°03'05" N 122°05'25" W

T-12 8-Sep-10 Transect 38°03'32" N 122°04'17" W

T-13 8-Sep-10 Transect 38°02'44" N 122°03'56" W

T-14 8-Sep-10 Transect 38°03'48" N 122°01'40" W

T-15 8-Sep-10 Transect 38°03'36" N 121°58'56" W

T-16 8-Sep-10 Transect 38°03'11" N 121°56'32" W

T-17 (USGS 757) 9-Sep-10 Transect 38°05'10" N 121°40'52" W

T-18 (Rio Vista) 9-Sep-10 Transect 38°08'57" N 121°41'22" W

T-19 9-Sep-10 Transect 38°03'47" N 121°47'42" W

T-20 9-Sep-10 Transect 38°03'50" N 121°50'56" W

T-21 9-Sep-10 Transect 38°02'46" N 121°53'53" W

T-22 9-Sep-10 Transect 38°03'19" N 121°57'17" W

Freeport 10-Sep-10 Transect 38°23'01" N 121°31'07" W

Vernalis 10-Sep-10 Transect 37°39'18" N 121°14'22" W

1 Coordinates are NAD83

2 Revised approximate coordinates based upon visual observation of where the samples were actually collected. 

Original coordinates were incorrect (see below for explanation)
North San Francisco Bay Selenium Characterization Study – Draft Final Report

A-4 Prepared by Tetra Tech, Inc. on behalf of WSPA

Table A-2

Dry Weather 2010: Refinery Receiving Water Sample Dates and Locations

Sample ID Date Type Latitude1 Longitude1

Val-01 13-Sep-10 Receiving Water 38°03'18.4" N 122°07'11.8" W

Val-02 13-Sep-10 Receiving Water 38°03'18.4" N 122°07'11.4" W

Val-03 13-Sep-10 Receiving Water 38°03'18.5" N 122°07'11.5" W

Tes-01 9-Sep-10 Receiving Water

38° 02' 57.0" N 122°05’27” W

(38° 02' 57.0" N)3 (122° 5' 26.8" W)3

Tes-02 9-Sep-10 Receiving Water 38°02'56.9" N 122°05'26.9" W

Tes-03 9-Sep-10 Receiving Water

38° 02' 57" N 122°05’27” W

(38° 02' 31.5" N)3 (122° 5' 26.4" W)3

Shell-012 9-Sep-10 Receiving Water 38°01’56.071” N 122° 07’ 49.074" W

Shell-022 9-Sep-10 Receiving Water 38° 01’ 56.240” N 122° 07’ 48.724" W

Shell-032 9-Sep-10 Receiving Water 38° 01’ 56.410” N 122° 07’ 48.374" W

P66-014 13-Sep-10 Receiving Water 38° 03’ 20.881" N 122° 15’ 41.139” W

P66-024 13-Sep-10 Receiving Water 38° 03’ 20.936" N 122° 15’ 40.735” W

P66-034 13-Sep-10 Receiving Water 38° 03’ 20.992" N 122° 15’ 40.330” W

Chev-02 9-Sep-10 Receiving Water 37°58'10.9" N 122°25'40.9" W

Chev-01 9-Sep-10 Receiving Water 37°58'10.6" N 122°25'40.6" W

Chev-03 9-Sep-10 Receiving Water 37°58'11.3" N 122°25'40.3" W

1 Coordinates are NAD83

2 Samples collected beneath pier because a ship was in port. Latitudes and Longitudes are approximate values.

3 Secondary coordinates using portable hand-held Trimble GPS unit. 4 Samples collected beneath pier. Latitudes and Longitudes are approximate values.
North San Francisco Bay Selenium Characterization Study – Draft Final Report

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Figure A-1

Dry Weather 2010: Transect Sample Locations.
North San Francisco Bay Selenium Characterization Study – Draft Final Report

A-6 Prepared by Tetra Tech, Inc. on behalf of WSPA

Table A-3

Wet Weather 2011: Transect Sample Dates and Locations

Sample ID Date Type Latitude1 Longitude1

Field Blank 15-Mar-11 QA – –

T-12 14-Mar-11 Transect 37°49.228 N 122°28.427 W

T-2 14-Mar-11 Transect 37°49.932 N 122°26.589 W

T-3 14-Mar-11 Transect 37°50.650 N 122°26.047 W

T-4 14-Mar-11 Transect 37°50.452 N 122°26.924 W

T-5 14-Mar-11 Transect 37°52.335 N 122°24.724 W

T-6 14-Mar-11 Transect 37°54.227 N 122°25.280 W

T-7 14-Mar-11 Transect 37°56.176 N 122°25.662 W

T-8 14-Mar-11 Transect 37°56.353 N 122°26.071 W

T-9 14-Mar-11 Transect 37°57.205 N 122°26.250 W

T-10 14-Mar-11 Transect 37°57.241 N 122°26.170 W

T-11 14-Mar-11 Transect 38°01.207 N 122°23.697 W

T-12 14-Mar-11 Transect 38°03.132 N 122°19.507 W

T-13 (Rio Vista) 15-Mar-11 Transect 38°08.951 N 121°41.313 W

T-14 (USGS 757) 15-Mar-11 Transect 38°05.051 N 121°40.995 W

T-15 15-Mar-11 Transect 38°03.927 N 121°51.346 W

T-16 15-Mar-11 Transect 38°03.333 N 121°56.664 W

T-17 15-Mar-11 Transect 38°03.722 N 122°01.544 W

T-18 15-Mar-11 Transect 38°04.648 N 122°03.003 W

T-19 15-Mar-11 Transect 38°03.574 N 122°12.482 W

T-20 15-Mar-11 Transect 38°03.798 N 122°14.173 W

Freeport 18-Mar-11 Transect 38°23'01" N 121°31'07" W

Vernalis 18-Mar-11 Transect 37°39'18" N 121°14'22" W

1 Coordinates are NAD83

2 Golden Gate

3 Rio Vista
North San Francisco Bay Selenium Characterization Study – Draft Final Report

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Table A-4

Wet Weather 2011: Refinery Receiving Water Sample Dates and Locations

Sample ID Date Type Latitude1 Longitude1

Val-01 16-Mar-11 Receiving Water 38°03' 18.3" N 122°07' 11.7" W

Val-02 16-Mar-11 Receiving Water 38°03' 18.7" N 122°07' 11.4" W

Val-03 16-Mar-11 Receiving Water 38°03' 18.9" N 122°07' 11.3" W

Tes-01 22-Mar-11 Receiving Water 38o 02’ 20.9” N 122o 05’ 26.9” W

Tes-02 22-Mar-11 Receiving Water 38o 02’ 56.8” N 122o 05’ 27.8” W

Tes-03 22-Mar-11 Receiving Water 38o 02’ 57.0” N 122o 05’ 26.1” W

Shell-01 16-Mar-11 Receiving Water 38°01’56.07” N 122° 07’ 49.07" W

Shell-02 16-Mar-11 Receiving Water 38° 01’ 56.24” N 122° 07’ 48.72" W

Shell-03 16-Mar-11 Receiving Water 38° 01’ 56.41” N 122° 07’ 48.37" W

P66-012 17-Mar-11 Receiving Water 38° 03’ 20.88" N 122° 15’ 41.14” W

P66-022 17-Mar-11 Receiving Water 38° 03’ 20.94" N 122° 15’ 40.74” W

P66-032 17-Mar-11 Receiving Water 38° 03’ 20.99" N 122° 15’ 40.33” W

Chev-02 16-Mar-11 Receiving Water 37°58'10.6" N 122°25'40.6" W

Chev-01 16-Mar-11 Receiving Water 37°58'10.9" N 122°25'40.9" W

Chev-03 16-Mar-11 Receiving Water 37°58'11.3" N 122°25'50.8" W

1 Coordinates are NAD83

2 Samples collected beneath pier. Latitudes and Longitudes are approximate values.
North San Francisco Bay Selenium Characterization Study – Draft Final Report

A-8 Prepared by Tetra Tech, Inc. on behalf of WSPA

Figure A-2

Wet Weather 2011 Transect Sample Locations. 
North San Francisco Bay Selenium Characterization Study – Draft Final Report

Prepared by Tetra Tech, Inc. on behalf of WSPA A-9

Table A-5

Dry Weather 2011: Transect Sample Dates and Locations

Sample ID Date Type Latitude1 Longitude1

Field Blank 03-Oct-11 QA – –

T-12 03-Oct-11 Transect 37°49.209 N 122° 28.724 W

T-2 03-Oct-11 Transect 37°50.989 N 122°24.937 W

T-3 03-Oct-11 Transect 37°51.484 N 122°24.699 W

T-4 03-Oct-11 Transect 37°53.362 N 122°25.342 W

T-5 03-Oct-11 Transect 37°56.387 N 122°26.711 W

T-6 03-Oct-11 Transect 37°58.409 N 122°26.322 W

T-7 03-Oct-11 Transect 37°59.969 N 122°24.844 W

T-8 03-Oct-11 Transect 38°01.399 N 122°23.026 W

T-9 03-Oct-11 Transect 38°02.536 N 122°21.104 W

T-10 04-Oct-11 Transect 38°02.887 N 122°19.989 W

T-11 04-Oct-11 Transect 38°02.977 N 122°19.932 W

T-12 04-Oct-11 Transect 38°03.410 N 122°17.029 W

T-13 04-Oct-11 Transect 38°03.729 N 122°13.730 W

T-14 04-Oct-11 Transect 38°02.874 N 122°10.522 W

T-15 04-Oct-11 Transect 38°02.079 N 122°08.797 W

T-16 04-Oct-11 Transect 38°03.020 N 122°05.639 W

T-17 04-Oct-11 Transect 38°03.825 N 122°01.609 W

T-18 (Rio Vista) 04-Oct-11 Transect 38°08.956 N 121°41.255 W

T-19 (USGS 757) 04-Oct-11 Transect 38°05.102 N 121°40.982 W

T-20 04-Oct-11 Transect 38°03.810 N 121°51.527 W

T-21 04-Oct-11 Transect 38°03.810 N 121°47.595 W

T-22 05-Oct-11 Transect 38°02.832 N 121°53.765 W

T-23 05-Oct-11 Transect 38°03.107 N 121°56.057 W

T-24 05-Oct-11 Transect 38°03.592 N 121°58.442 W

Freeport 07-Oct-11 Transect 38°22.994 N 121°31.161 W

Vernalis 07-Oct-11 Transect 37°39.458 N 122°14.414 W

1 Coordinates are NAD83

2 Golden Gate
North San Francisco Bay Selenium Characterization Study – Draft Final Report

A-10 Prepared by Tetra Tech, Inc. on behalf of WSPA

Table A-6

Dry Weather 2011: Refinery Receiving Water Sample Dates and Locations

Sample ID Date Type Latitude1 Longitude1

Val-01 06-Oct-11 Receiving Water 38°03.305 N 122°07.196 W

Val-02 06-Oct-11 Receiving Water 38°03.312 N 122°07.190 W

Val-03 06-Oct-11 Receiving Water 38°03.316 N 122°07.189 W

Tes-01 06-Oct-11 Receiving Water 38o 02.950 N 122o05.435 W

Tes-02 06-Oct-11 Receiving Water 38o 02.948 N 122o05.448 W

Tes-03 06-Oct-11 Receiving Water 38o 02.947 N 122o05.463 W

Shell-01 05-Oct-11 Receiving Water 38°01.934 N 122°07.818 W

Shell-02 05-Oct-11 Receiving Water 38°01.937 N 122°07.812 W

Shell-03 05-Oct-11 Receiving Water 38°01.940 N 122°07.806 W

P66-012 11-Oct-11 Receiving Water 38°03.348 N 122°15.686 W

P66-022 11-Oct-11 Receiving Water 38°03.349 N 122°15.679 W

P66-032 11-Oct-11 Receiving Water 38°03.350 N 122°15.672 W

Chev-02 03-Oct-11 Receiving Water 37°58.189 N 122°25.672 W

Chev-01 03-Oct-11 Receiving Water 37°58.179 N 122°25.679 W

Chev-03 03-Oct-11 Receiving Water 37°58.177 N 122°25.677 W

1 Coordinates are NAD83

2 Samples collected beneath pier. Latitudes and Longitudes are approximate values.
North San Francisco Bay Selenium Characterization Study – Draft Final Report

Prepared by Tetra Tech, Inc. on behalf of WSPA A-11

Figure A-3

Dry Weather 2011 Transect Sample Locations.
North San Francisco Bay Selenium Characterization Study – Draft Final Report

A-12 Prepared by Tetra Tech, Inc. on behalf of WSPA

Table A-7

Wet Weather 2012: Transect Sample Dates and Locations

Sample ID Date Type Latitude1 Longitude1

Field Blank 10-Apr-12 QA – –

T-12 10-Apr-12 Transect 37°49.114 N 122°28.690 W

T-2 10-Apr-12 Transect 37°50.134 N 122°26.496 W

T-3 10-Apr-12 Transect 37°50.977 N 122°24.922 W

T-4 10-Apr-12 Transect 37°51.321 N 122°24.695 W

T-5 10-Apr-12 Transect 37°53.228 N 122°25.339 W

T-6 10-Apr-12 Transect 37°54.702 N 122°26.011 W

T-7 10-Apr-12 Transect 37°56.713 N 122°26.686 W

T-8 11-Apr-12 Transect 38°02.759 N 121°53.903 W

T-9 11-Apr-12 Transect 38°03.142 N 121°56.400 W

T-10 11-Apr-12 Transect 38°03.608 N 121°58.884 W

T-11 11-Apr-12 Transect 38°03.737 N 122°01.406 W

T-12 12-Apr-12 Transect 37°58.528 N 122°25.868 W

T-13 12-Apr-12 Transect 38°00.655 N 122.24.239 W

T-14 12-Apr-12 Transect 38°02.156 N 122°21.676 W

T-15 12-Apr-12 Transect 38°03.255 N 122°18.834 W

T-16 12-Apr-12 Transect 38°03.674 N 122°15.692 W

T-17 12-Apr-12 Transect 38°03.630 N 122°12.545 W

T-18 12-Apr-12 Transect 38°02.202 N 122°10.146 W

T-19 12-Apr-12 Transect 38°02.743 N 122°06.188 W

T-20 (Rio Vista) 11-Apr-12 Transect 38°08.938 N 121°41.367 W

T-21 (USGS 757) 11-Apr-12 Transect 38°05.069 N 121°40.972 W

Freeport 16-Apr-12 Transect 38°22.993 N 121°31.144 W

Vernalis 16-Apr-12 Transect 37°39.430 N 121°14.429 W

1 Coordinates are NAD83

2 Golden Gate
North San Francisco Bay Selenium Characterization Study – Draft Final Report

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Table A-8

Wet Weather 2012: Refinery Receiving Water Sample Dates and Locations

Sample ID Date Type Latitude1 Longitude1

Val-01 11-Apr-12 Receiving Water 38°03.306 N 122°07.195 W

Val-02 11-Apr-12 Receiving Water 38°03.312 N 122°07.191 W

Val-03 11-Apr-12 Receiving Water 38°03.316 N 122°07.188 W

Tes-01 25-Apr-12 Receiving Water 38o 02.950 N 122o05.435 W

Tes-02 25-Apr-12 Receiving Water 38o 02.948 N 122o05.448 W

Tes-03 25-Apr-12 Receiving Water 38o 02.947 N 122o05.463 W

Shell-01 12-Apr-12 Receiving Water 38°01.934 N 122°07.818 W

Shell-02 12-Apr-12 Receiving Water 38°01.937 N 122°07.812 W

Shell-03 12-Apr-12 Receiving Water 38°01.940 N 122°07.806 W

P66-012 13-Apr-12 Receiving Water 38°03.348 N 122°15.686 W

P66-022 13-Apr-12 Receiving Water 38°03.349 N 122°15.679 W

P66-032 13-Apr-12 Receiving Water 38°03.350 N 122°15.672 W

Chev-02 10-Apr-12 Receiving Water 37°58.177 N 122°25.677 W

Chev-01 10-Apr-12 Receiving Water 37°58.182 N 122°25.682 W

Chev-03 10-Apr-12 Receiving Water 37°58.188 N 122°25.671 W

1 Coordinates are NAD83

2 Samples collected beneath pier. Latitudes and Longitudes are approximate values.
North San Francisco Bay Selenium Characterization Study – Draft Final Report

A-14 Prepared by Tetra Tech, Inc. on behalf of WSPA

Figure A-4

Wet Weather 2012 Transect Sample Locations.
North San Francisco Bay Selenium Characterization Study – Draft Final Report

Prepared by Tetra Tech, Inc. on behalf of WSPA B-1

Appendix B

Data Tables

North San Francisco Bay Selenium Characterization Study – Draft Final Report

Prepared by Tetra Tech, Inc. on behalf of WSPA B-3

Table B-1a

2010 Dissolved Analyses: Dry Weather Transect

Station #

Sample

Date Latitude Longitude

Salinity (psu) Selenium

Field 

Salinity

Lab 

Salinity

Se IV

(μg/L) SD

Se VI

(μg/L) SD

Total Se 

(μg/L) SD

Organic Se 

(μg/L) SD

Field Blank 8-Sep-10 - - NA ND ND ND ND ND

T-1 8-Sep-10 37°49'09" N 122°23'38" W 32.6 32.14 0.014 0.000 0.031 0.002 0.079 0.004 0.034 0.004

T-2 8-Sep-10 37°51'10" N 122°24'40" W 30.8 30.39 0.018 0.001 0.031 0.002 0.088 0.005 0.039 0.006

T-3 8-Sep-10 37°08'48" N 122°25'23" W 29.2 29.03 0.019 0.000 0.030 0.002 0.091 0.003 0.043 0.004

T-4 8-Sep-10 38°01'55" N 122°22'05" W 27.9 27.51 0.021 0.001 0.038 0.002 0.100 0.001 0.040 0.002

T-5 8-Sep-10 38°03'23" N 123°17'49" W 24.8 24.18 0.027 0.001 0.039 0.002 0.101 0.001 0.035 0.002

T-6 8-Sep-10 38°03'41" N 122°15'17" W 23.7 23.73 0.020 0.001 0.047 0.003 0.105 0.002 0.038 0.004

T-7 8-Sep-10 38°03'38" N 122°12'48" W 23.5 23.21 0.019 0.001 0.045 0.001 0.105 0.002 0.041 0.002

T-8 8-Sep-10 38°02'30" N 122°10'09" W 22.8 22.34 0.021 0.001 0.058 0.004 0.104 0.003 0.026 0.005

T-9 8-Sep-10 38°02'18" N 122°07'42" W 20.5 20.37 0.019 0.000 0.049 0.001 0.098 0.006 0.031 0.006

T-10 8-Sep-10 38°02'40" N 122°06'26" W 20.1 19.89 0.025 0.001 0.051 0.005 0.105 0.003 0.029 0.006

T-11 8-Sep-10 38°03'05" N 122°05'25" W 18.7 18.70 0.022 0.001 0.047 0.004 0.109 0.004 0.040 0.006

T-12 8-Sep-10 38°03'32" N 122°04'17" W 16 16.19 0.023 0.001 0.047 0.004 0.122 0.004 0.052 0.005

T-13 8-Sep-10 38°02'44" N 122°03'56" W 14.7 15.97 0.024 0.001 0.045 0.001 0.109 0.002 0.040 0.003

T-14 8-Sep-10 38°03'48" N 122°01'40" W 12.5 12.04 0.019 0.001 0.044 0.001 0.106 0.001 0.043 0.002

T-15 8-Sep-10 38°03'36" N 121°58'56" W 11.5 11.27 0.019 0.001 0.033 0.001 0.084 0.002 0.031 0.002

T-16 8-Sep-10 38°03'11" N 121°56'32" W 7.4 8.00 0.013 0.001 0.028 0.003 0.061 0.001 0.020 0.003

T-17 9-Sep-10 38°05'10" N 121°40'52" W 0.74 ND 0.015 0.001 0.013 0.002 0.058 0.002 0.030 0.003

T-18 9-Sep-10 38°08'57" N 121°41'22" W 0.08 ND 0.015 0.001 0.008 0.001 0.067 0.003 0.043 0.004

T-19 9-Sep-10 38°03'47" N 121°47'42" W 1.2 ND 0.011 0.001 0.021 0.001 0.073 0.004 0.041 0.004

T-20 9-Sep-10 38°03'50" N 121°50'56" W 2.8 2.77 NA-Sample broken during shipping

T-21 9-Sep-10 38°02'46" N 121°53'53" W 4.25 4.22 0.007 0.000 0.034 0.001 0.073 0.000 0.031 0.001

T-22 9-Sep-10 38°03'19" N 121°57'17" W 5.5 5.41 0.012 0.000 0.031 0.003 0.078 0.003 0.035 0.004

Freeport 10-Sep-10 38°23'01" N 121°31'07" W NA NA 0.003 0.000 0.017 0.001 0.068 0.004 0.048 0.004

Vernalis 10-Sep-10 37°39'18" N 121°14'22" W NA NA 0.021 0.001 0.283 0.005 0.353 0.003 0.049 0.006

NOTES: NA - Not Analyzed; ND - Non-detectable (for P, <0.02 μM; Si, < 1 μM; Salinity, < 2 g/l; Se, < 0.0016 μg/l); Each station represents a single sample, the standard deviation 

(SD) was computed based on triplicate instrumental analyses on individual field samples. Station T-1 is at Golden Gate. 
North San Francisco Bay Selenium Characterization Study – Draft Final Report

B-4 Prepared by Tetra Tech, Inc. on behalf of WSPA

Table B-1b

2011 Dissolved Analyses: Dry Weather Transect

Station #

Sample

Date Latitude Longitude

Salinity (psu) Selenium

Field 

Salinity

Lab 

Salinity

Se IV

(μg/L) SD

Se VI

(μg/L) SD

Total Se 

(μg/L) SD

Organic Se 

(μg/L) SD

Field Blank 03-Oct-11 – – NA ND ND ND ND ND

T-1 03-Oct-11 37°49.209 N 122° 28.724 W 30.14 30.71 0.009 0.00 0.051 0.03 0.072 0.03 0.011 0.04

T-2 03-Oct-11 37°50.989 N 122°24.937 W 28.60 29.12 0.015 0.01 0.045 0.06 0.071 0.02 0.011 0.07

T-3 03-Oct-11 37°51.484 N 122°24.699 W 27.10 27.78 0.014 0.01 0.063 0.04 0.077 0.05 ND

T-4 03-Oct-11 37°53.362 N 122°25.342 W 25.60 25.70 0.017 0.00 0.059 0.02 0.077 0.00 ND

T-5 03-Oct-11 37°56.387 N 122°26.711 W 24.30 24.68 0.016 0.00 0.051 0.00 0.095 0.07 0.028 0.07

T-6 03-Oct-11 37°58.409 N 122°26.322 W 25.40 25.55 0.018 0.00 0.049 0.05 0.091 0.01 0.024 0.05

T-7 03-Oct-11 37°59.969 N 122°24.844 W 23.55 24.28 0.018 0.01 0.049 0.03 0.085 0.02 0.019 0.03

T-8 03-Oct-11 38°01.399 N 122°23.026 W 24.00 24.22 0.017 0.01 0.064 0.04 0.091 0.00 0.011 0.04

T-9 03-Oct-11 38°02.536 N 122°21.104 W 22.30 22.56 0.023 0.00 0.064 0.01 0.082 0.02 ND

T-10 04-Oct-11 38°02.887 N 122°19.989 W 20.50 22.12 0.021 0.01 0.061 0.04 0.090 0.06 ND

T-11 04-Oct-11 38°02.977 N 122°19.932 W 18.20 17.89 0.020 0.01 0.060 0.08 0.106 0.03 0.027 0.08

T-12 04-Oct-11 38°03.410 N 122°17.029 W 16.20 16.07 0.024 0.01 0.045 0.03 0.104 0.04 0.035 0.05

T-13 04-Oct-11 38°03.729 N 122°13.730 W 14.55 15.00 0.026 0.00 0.059 0.01 0.105 0.02 0.019 0.02

T-14 04-Oct-11 38°02.874 N 122°10.522 W 12.00 12.12 0.021 0.02 0.057 0.05 0.100 0.04 0.022 0.06

T-15 04-Oct-11 38°02.079 N 122°08.797 W 9.50 10.18 0.024 0.00 0.053 0.01 0.101 0.04 0.024 0.04

T-16 04-Oct-11 38°03.020 N 122°05.639 W 7.70 8.65 0.025 0.00 0.057 0.07 0.109 0.04 0.027 0.08

T-17 04-Oct-11 38°03.825 N 122°01.609 W 4.80 4.65 0.015 0.00 0.056 0.04 0.080 0.03 0.009 0.05

T-18 04-Oct-11 38°08.956 N 121°41.255 W 0.13 ND 0.015 0.00 0.031 0.03 0.067 0.02 0.020 0.04

T-19 04-Oct-11 38°05.102 N 121°40.982 W 0.08 ND 0.011 0.01 0.028 0.03 0.064 0.02 0.025 0.03

T-20 04-Oct-11 38°03.810 N 121°51.527 W 0.58 ND 0.012 0.03 0.032 0.04 0.068 0.05 0.024 0.05

T-21 04-Oct-11 38°03.810 N 121°47.595 W 0.08 ND 0.015 0.01 0.034 0.02 0.070 0.03 0.021 0.04

T-22 05-Oct-11 38°02.832 N 121°53.765 W 0.65 ND 0.011 0.00 0.036 0.01 0.072 0.02 0.025 0.02

T-23 05-Oct-11 38°03.107 N 121°56.057 W 0.41 ND 0.012 0.01 0.033 0.02 0.068 0.04 0.023 0.04

T-24 05-Oct-11 38°03.592 N 121°58.442 W 2.00 2.30 0.017 0.01 0.028 0.02 0.074 0.02 0.029 0.03
North San Francisco Bay Selenium Characterization Study – Draft Final Report

Prepared by Tetra Tech, Inc. on behalf of WSPA B-5

Table B-1b, Continued

2011 Dissolved Analyses: Dry Weather Transect

Station #

Sample

Date Latitude Longitude

Salinity (psu) Selenium

Field 

Salinity

Lab 

Salinity

Se IV

(μg/L) SD

Se VI

(μg/L) SD

Total 

Se 

(μg/L) SD

Organic 

Se (μg/L) SD

Freeport 07-Oct-11 38°22.994 N 121°31.161 W 0.10 N/A 0.007 0.01 0.035 0.03 0.064 0.03 0.021 0.04

Vernalis 07-Oct-11 37°39.458 N 122°14.414 W 0.02 N/A 0.023 0.01 0.148 0.06 0.207 0.04 0.036 0.07

Vernalis-1 06-Jul-11 37o 35’54.2” N 121o 23’9.7” W 0.10 No sample 0.008 0.01 0.199 0.01 0.250 0.05 0.042 0.05

Vernalis-2 06-Jul-11 37o 35’54.2” N 121o 23’9.7” W 0.10 No sample 0.006 0.00 0.210 0.04 0.244 0.03 0.028 0.05

Offshore-1 01-Sep-11 37o 56’ 32” N 121o 57’ 63” W 33.40 33.13 0.006 0.00 0.047 0.01 0.059 0.03 ND

Offshore-2 01-Sep-11 37o 51’ 63” N 121o 48’ 97” W 33.11 33.40 0.010 0.00 0.052 0.01 0.067 0.04 ND

NOTES: NA - Not Analyzed; ND - Non-detectable (for P, <0.02 μM; Si, < 1 μM; Salinity, < 2 g/l; Se, < 0.0016 μg/l); Each station represents a single sample, the standard deviation 

(SD) was computed based on triplicate instrumental analyses on individual field samples. Station T-1 is at Golden Gate.
North San Francisco Bay Selenium Characterization Study – Draft Final Report

B-6 Prepared by Tetra Tech, Inc. on behalf of WSPA

Table B-2a

Ancillary Parameters: 2010 Dry Weather Transect

Station #

Sample

Date Latitude Longitude

Salinity (psu) Nutrients

Field 

Salinity

Lab

Salinity

Phosphate 

(μmol/L) SD

Nitrate + 

Nitrite (μmol/L) SD

Silicate 

(μmol/L) SD

Field Blank 8-Sep-10 - - NA ND ND 0.12 0.00 ND

T-1 8-Sep-10 37°49'09" N 122°23'38" W 32.6 32.14 2.12 0.01 19.22 0.02 38.89 0.10

T-2 8-Sep-10 37°51'10" N 122°24'40" W 30.8 30.39 2.46 0.00 20.13 0.02 56.62 0.04

T-3 8-Sep-10 37°08'48" N 122°25'23" W 29.2 29.03 2.61 0.01 20.75 0.02 67.95 0.16

T-4 8-Sep-10 38°01'55" N 122°22'05" W 27.9 27.51 2.35 0.00 19.21 0.13 66.93 0.10

T-5 8-Sep-10 38°03'23" N 123°17'49" W 24.8 24.18 2.88 0.00 23.21 0.01 100.40 0.10

T-6 8-Sep-10 38°03'41" N 122°15'17" W 23.7 23.73 2.88 0.01 23.30 0.08 98.81 0.06

T-7 8-Sep-10 38°03'38" N 122°12'48" W 23.5 23.21 2.66 0.00 22.51 0.02 97.83 0.17

T-8 8-Sep-10 38°02'30" N 122°10'09" W 22.8 22.34 2.79 0.00 23.78 0.02 105.97 0.31

T-9 8-Sep-10 38°02'18" N 122°07'42" W 20.5 20.37 2.92 0.01 25.16 0.06 123.16 0.02

T-10 8-Sep-10 38°02'40" N 122°06'26" W 20.1 19.89 1.97 0.01 19.64 0.02 91.77 0.29

T-11 8-Sep-10 38°03'05" N 122°05'25" W 18.7 18.70 2.55 0.00 23.04 0.03 112.44 0.07

T-12 8-Sep-10 38°03'32" N 122°04'17" W 16 16.19 2.86 0.00 23.93 0.03 148.32 0.20

T-13 8-Sep-10 38°02'44" N 122°03'56" W 14.7 15.97 2.84 0.00 24.00 0.02 146.57 0.12

T-14 8-Sep-10 38°03'48" N 122°01'40" W 12.5 12.04 2.60 0.00 22.78 0.01 167.78 0.10

T-15 8-Sep-10 38°03'36" N 121°58'56" W 11.5 11.27 2.53 0.00 22.17 0.06 169.54 0.04

T-16 8-Sep-10 38°03'11" N 121°56'32" W 7.4 8.00 2.07 0.00 18.16 0.03 158.41 0.69

T-17 9-Sep-10 38°05'10" N 121°40'52" W 0.74 ND 1.75 0.00 14.83 0.03 218.78 0.32

T-18 9-Sep-10 38°08'57" N 121°41'22" W 0.08 ND 1.49 0.00 12.76 0.14 188.90 0.55

T-19 9-Sep-10 38°03'47" N 121°47'42" W 1.2 ND 1.73 0.01 17.53 0.02 232.02 0.55

T-20 9-Sep-10 38°03'50" N 121°50'56" W 2.8 2.77 1.81 0.01 17.65 0.02 205.21 0.08

T-21 9-Sep-10 38°02'46" N 121°53'53" W 4.25 4.22 1.90 0.00 17.97 0.05 200.32 0.21

T-22 9-Sep-10 38°03'19" N 121°57'17" W 5.5 5.41 1.97 0.00 18.21 0.04 193.66 0.30

Freeport 10-Sep-10 38°23'01" N 121°31'07" W NA NA 1.54 0.01 3.33 0.02 182.01 0.61

Vernalis 10-Sep-10 37°39'18" N 121°14'22" W NA NA 4.55 0.00 173.65 0.35 252.21 0.54

NOTES: NA - Not Analyzed; ND - Non-detectable (for P, <0.02 μM; Si, < 1 μM; Salinity, < 2 g/l; Se, < 0.0016 μg/l); Each station represents a single sample, the standard deviation 

(SD) was computed based on triplicate instrumental analyses on individual field samples. Station T-1 is at Golden Gate. NOTE: No Nutrient data were reported for the 2011 Dry 

Weather Transect Event.
North San Francisco Bay Selenium Characterization Study – Draft Final Report

Prepared by Tetra Tech, Inc. on behalf of WSPA B-7

Table B-2b

Ancillary Parameters: 2011 Dry Weather Transect

Station #

Sample

Date Latitude Longitude

Salinity (psu) Nutrients

Field 

Salinity

Lab

Salinity

Phosphate 

(μmol/L) SD

Nitrate + 

Nitrite 

(μmol/L) SD

Silicate 

(μmol/L) SD

Field Blank 03-Oct-11 – – NA ND 0.02 0.00 0.21 0.00 0.04 0.02

T-1 03-Oct-11 37°49.209 N 122° 28.724 W 30.14 30.71 1.25 0.00 7.58 0.01 35.22 0.01

T-2 03-Oct-11 37°50.989 N 122°24.937 W 28.60 29.12 1.56 0.00 9.20 0.01 48.14 0.05

T-3 03-Oct-11 37°51.484 N 122°24.699 W 27.10 27.78 1.60 0.00 11.22 0.01 54.99 0.02

T-4 03-Oct-11 37°53.362 N 122°25.342 W 25.60 25.70 1.97 0.00 12.03 0.01 74.43 0.02

T-5 03-Oct-11 37°56.387 N 122°26.711 W 24.30 24.68 2.19 0.03 13.65 0.01 85.58 0.05

T-6 03-Oct-11 37°58.409 N 122°26.322 W 25.40 25.55 2.05 0.00 12.81 0.02 45.15 0.10

T-7 03-Oct-11 37°59.969 N 122°24.844 W 23.55 24.28 2.02 0.00 15.26 0.08 73.36 0.05

T-8 03-Oct-11 38°01.399 N 122°23.026 W 24.00 24.22 1.67 0.00 11.31 0.01 67.31 0.01

T-9 03-Oct-11 38°02.536 N 122°21.104 W 22.30 22.56 1.90 0.00 13.91 0.00 77.55 0.02

T-10 04-Oct-11 38°02.887 N 122°19.989 W 20.50 22.12 2.13 0.00 14.41 0.00 91.37 0.13

T-11 04-Oct-11 38°02.977 N 122°19.932 W 18.20 17.89 1.90 0.00 14.49 0.01 107.12 0.10

T-12 04-Oct-11 38°03.410 N 122°17.029 W 16.20 16.07 1.83 0.00 14.28 0.01 108.59 0.06

T-13 04-Oct-11 38°03.729 N 122°13.730 W 14.55 15.00 1.84 0.00 15.64 0.01 129.92 0.02

T-14 04-Oct-11 38°02.874 N 122°10.522 W 12.00 12.12 1.94 0.00 15.59 0.01 158.39 0.22

T-15 04-Oct-11 38°02.079 N 122°08.797 W 9.50 10.18 1.80 0.00 14.99 0.01 142.58 0.12

T-16 04-Oct-11 38°03.020 N 122°05.639 W 7.70 8.65 2.24 0.00 18.19 0.01 159.85 0.03

T-17 04-Oct-11 38°03.825 N 122°01.609 W 4.80 4.65 2.04 0.00 13.92 0.01 208.50 0.37

T-18 04-Oct-11 38°08.956 N 121°41.255 W 0.13 ND 1.34 0.00 9.81 0.00 70.63 0.04

T-19 04-Oct-11 38°05.102 N 121°40.982 W 0.08 ND 1.62 0.01 12.00 0.06 182.40 0.18

T-20 04-Oct-11 38°03.810 N 121°51.527 W 0.58 ND 2.06 0.00 17.14 0.01 276.05 0.05

T-21 04-Oct-11 38°03.810 N 121°47.595 W 0.08 ND 1.65 0.00 12.84 0.00 262.92 0.35

T-22 05-Oct-11 38°02.832 N 121°53.765 W 0.65 ND 1.88 0.00 15.45 0.02 268.34 0.02

T-23 05-Oct-11 38°03.107 N 121°56.057 W 0.41 ND 1.86 0.02 15.40 0.02 241.86 0.14

T-24 05-Oct-11 38°03.592 N 121°58.442 W 2.00 2.30 2.01 0.00 15.90 0.09 233.15 0.12
North San Francisco Bay Selenium Characterization Study – Draft Final Report

B-8 Prepared by Tetra Tech, Inc. on behalf of WSPA

Table B-2b, Continued

Ancillary Parameters: 2011 Dry Weather Transect

Station #

Sample

Date Latitude Longitude

Salinity (psul) Nutrients

Field 

Salinity

Lab

Salinity

Phosphate 

(μmol/L) SD

Nitrate + 

Nitrite 

(μmol/L) SD

Silicate 

(μmol/L) SD

Freeport 07-Oct-11 38°22.994 N 121°31.161 W 0.10 N/A NA NA NA

Vernalis 07-Oct-11 37°39.458 N 122°14.414 W 0.02 N/A NA NA NA

Vernalis-1 06-Jul-11 37o 35’54.2” N 121o 23’9.7” W 0.10 No 

sample 1.90 0.03 40.96 0.13 185.70 0.04

Vernalis-2 06-Jul-11 37o 35’54.2” N 121o 23’9.7” W 0.10 No 

sample 1.91 0.00 40.90 0.05 184.85 0.09

Offshore-1 01-Sep-11 37o 56’ 32” N 121o 57’ 63” W 33.40 33.13 0.86 0.00 8.96 0.02 10.70 0.21

Offshore-2 01-Sep-11 37o 51’ 63” N 121o 48’ 97” W 33.11 33.40 1.26 0.00 12.15 0.02 18.03 0.02

NOTES: NA - Not Analyzed; ND - Non-detectable (for P, <0.02 μM; Si, < 1 μM; Salinity, < 2 g/l; Se, < 0.0016 μg/l); Each station represents a single sample, the standard deviation 

(SD) was computed based on triplicate instrumental analyses on individual field samples. Station T-1 is at Golden Gate.
North San Francisco Bay Selenium Characterization Study – Draft Final Report

Prepared by Tetra Tech, Inc. on behalf of WSPA B-9

Table B-3a

2010 Particulate Analyses: Dry Weather Transect

Station # Sample Date Latitude Longitude

Lab

Salinity (psu)

Chlorophyll Selenium TSM

Chl a (μg/L) Phaeo a (μg/L) Total Se (μg/L) SD (mg/L)

Field Blank 8-Sep-10 - - ND ND ND ND

T-1 8-Sep-10 37°49'09" N 122°23'38" W 32.14 1.69 1.52 0.007 0.001 32.7

T-2 8-Sep-10 37°51'10" N 122°24'40" W 30.39 1.52 1.16 0.007 0.001 25.9

T-3 8-Sep-10 37°08'48" N 122°25'23" W 29.03 1.16 1.9 0.005 0.000 34.3

T-4 8-Sep-10 38°01'55" N 122°22'05" W 27.51 0.92 2.15 0.019 0.001 58.9

T-5 8-Sep-10 38°03'23" N 123°17'49" W 24.18 0.61 1.4 0.017 0.001 53.7

T-6 8-Sep-10 38°03'41" N 122°15'17" W 23.73 0.71 1.09 0.018 0.001 63.4

T-7 8-Sep-10 38°03'38" N 122°12'48" W 23.21 0.55 1.52 0.019 0.001 57.5

T-8 8-Sep-10 38°02'30" N 122°10'09" W 22.34 0.44 1.14 0.012 0.001 54.0

T-9 8-Sep-10 38°02'18" N 122°07'42" W 20.37 0.4 0.67 0.008 0.001 31.9

T-10 8-Sep-10 38°02'40" N 122°06'26" W 19.89 0.39 1.33 0.014 0.001 48.2

T-11 8-Sep-10 38°03'05" N 122°05'25" W 18.70 0.5 1.43 0.001 0.001 43.4

T-12 8-Sep-10 38°03'32" N 122°04'17" W 16.19 0.56 0.92 0.017 0.001 39.8

T-13 8-Sep-10 38°02'44" N 122°03'56" W 15.97 0.6 0.79 0.015 0.001 34.3

T-14 8-Sep-10 38°03'48" N 122°01'40" W 12.04 0.86 0.88 0.010 0.000 24.9

T-15 8-Sep-10 38°03'36" N 121°58'56" W 11.27 1.39 1.38 0.009 0.000 22.5

T-16 8-Sep-10 38°03'11" N 121°56'32" W 8.00 1.94 1.01 0.011 0.000 24.1

T-17 9-Sep-10 38°05'10" N 121°40'52" W ND 0.45 0.9 0.007 0.000 9.7

T-18 9-Sep-10 38°08'57" N 121°41'22" W ND 0.89 1.61 0.004 0.000 14.5

T-19 9-Sep-10 38°03'47" N 121°47'42" W ND 0.88 14.37 0.009 0.000 22.3

T-20 9-Sep-10 38°03'50" N 121°50'56" W 2.77 1.12 1.08 0.007 0.000 17.4

T-21 9-Sep-10 38°02'46" N 121°53'53" W 4.22 1.9 1.63 0.014 0.000 25.3

T-22 9-Sep-10 38°03'19" N 121°57'17" W 5.41 1.72 1.46 0.010 0.001 17.7

Freeport 10-Sep-10 38°23'01" N 121°31'07" W NA Not Sampled Not Sampled 4.2

Vernalis 10-Sep-10 37°39'18" N 121°14'22" W NA Not Sampled Not Sampled 0.002 0.000 24.1

NOTES: NA - Not Analyzed; ND - Non-detectable (Salinity, < 2 g/l; Se, < 0.0016 μg/l); Each station represents a single sample, the standard deviation (SD) was computed based on 

triplicate instrumental analyses on individual field samples. TSM refers to total suspended material, and includes mineral, organic, and living particulates in the water column. Station T1 is at Golden Gate. 
North San Francisco Bay Selenium Characterization Study – Draft Final Report

B-10 Prepared by Tetra Tech, Inc. on behalf of WSPA

Table B-3a (continued)

2010 Particulate Analyses: Dry Weather Transect

Station # Sample Date Latitude Longitude

Lab

Salinity

(psu)

Total Se

(μg/L) SD

Se IV +VI

(μg/L) SD

Se 0

(μg/L) SD

Organic Se

(μg/L) SD

Field Blank 8-Sep-10 - - ND ND ND 0.00 ND ND

T-1 8-Sep-10 37°49'09" N 122°23'38" W 32.14 0.007 0.001 0.001 0.000 ND 0.000 0.006 0.001

T-2 8-Sep-10 37°51'10" N 122°24'40" W 30.39 0.007 0.001 0.005 0.000 ND 0.000 0.002 0.001

T-3 8-Sep-10 37°08'48" N 122°25'23" W 29.03 0.005 0.000 0.002 0.000 0.008 0.000 ND 0.000

T-4 8-Sep-10 38°01'55" N 122°22'05" W 27.51 0.019 0.001 0.005 0.000 0.004 0.000 0.011 0.001

T-5 8-Sep-10 38°03'23" N 123°17'49" W 24.18 0.017 0.001 0.001 0.000 0.008 0.001 0.009 0.001

T-6 8-Sep-10 38°03'41" N 122°15'17" W 23.73 0.018 0.001 0.001 0.000 ND 0.000 0.017 0.001

T-7 8-Sep-10 38°03'38" N 122°12'48" W 23.21 0.019 0.001 0.001 0.000 0.027 0.002 ND 0.000

T-8 8-Sep-10 38°02'30" N 122°10'09" W 22.34 0.012 0.001 0.003 0.000 0.004 0.000 0.004 0.001

T-9 8-Sep-10 38°02'18" N 122°07'42" W 20.37 0.008 0.001 0.002 0.000 0.017 0.001 ND 0.000

T-10 8-Sep-10 38°02'40" N 122°06'26" W 19.89 0.014 0.001 ND 0.000 0.014 0.000 ND 0.000

T-11 8-Sep-10 38°03'05" N 122°05'25" W 18.70 0.001 0.001 0.004 0.000 0.022 0.000 ND 0.000

T-12 8-Sep-10 38°03'32" N 122°04'17" W 16.19 0.017 0.001 0.001 0.000 0.024 0.000 ND 0.000

T-13 8-Sep-10 38°02'44" N 122°03'56" W 15.97 0.015 0.001 ND 0.000 ND 0.000 0.015 0.001

T-14 8-Sep-10 38°03'48" N 122°01'40" W 12.04 0.010 0.000 0.000 0.000 ND 0.000 0.010 0.000

T-15 8-Sep-10 38°03'36" N 121°58'56" W 11.27 0.009 0.000 0.002 0.000 0.003 0.000 0.004 0.000

T-16 8-Sep-10 38°03'11" N 121°56'32" W 8.00 0.011 0.000 0.004 0.000 0.004 0.000 0.003 0.001

T-17 9-Sep-10 38°05'10" N 121°40'52" W ND 0.007 0.000 0.004 0.000 0.005 0.000 ND 0.000

T-18 9-Sep-10 38°08'57" N 121°41'22" W ND 0.004 0.000 0.005 0.000 ND 0.000 ND 0.000

T-19 9-Sep-10 38°03'47" N 121°47'42" W ND 0.009 0.000 0.002 0.000 0.024 0.001 ND 0.000

T-20 9-Sep-10 38°03'50" N 121°50'56" W 2.77 0.007 0.000 ND 0.000 ND 0.000 ND 0.000

T-21 9-Sep-10 38°02'46" N 121°53'53" W 4.22 0.014 0.000 0.003 0.000 ND 0.000 0.011 0.000

T-22 9-Sep-10 38°03'19" N 121°57'17" W 5.41 0.010 0.001 0.003 0.000 0.004 0.000 0.002 0.001

Freeport 10-Sep-10 38°23'01" N 121°31'07" W NA No filter

Vernalis 10-Sep-10 37°39'18" N 121°14'22" W NA 0.002 0.000 ND 0.000 No filter 0.002 0.000

NOTES: NA - Not Analyzed; ND - Non-detectable (Salinity, < 2 g/l; Se, < 0.0004 μg/l); Each station represents a single sample, the standard deviation (SD) was computed based on 

triplicate instrumental analyses on individual field samples. No Filter: for two river station samples insufficient cleaned filters were available for the last day of sampling. Station T-1 is at 

Golden Gate. 
North San Francisco Bay Selenium Characterization Study – Draft Final Report

Prepared by Tetra Tech, Inc. on behalf of WSPA B-11

Table B-3b

2011 Particulate Analyses: Dry Weather Transect

Station #

Sample

Date Latitude Longitude

Lab Salinity

(psu)

Chlorophyll Selenium

TSM

(mg/L)

Chl a 

(μg/L)

Phaeo a 

(μg/L)

Total Se

(μg/L) SD

Field Blank 03-Oct-11 – – ND 0.01 0.09 0.0020 0.00 0.86

T-1 03-Oct-11 37°49.209 N 122° 28.724 W 30.71 6.84 2.45 0.0115 0.00 16.88

T-2 03-Oct-11 37°50.989 N 122°24.937 W 29.12 7.20 3.16 0.0102 0.00 11.23

T-3 03-Oct-11 37°51.484 N 122°24.699 W 27.78 6.59 3.01 0.0135 0.00 15.31

T-4 03-Oct-11 37°53.362 N 122°25.342 W 25.70 7.85 4.13 0.0127 0.00 19.50

T-5 03-Oct-11 37°56.387 N 122°26.711 W 24.68 4.58 2.40 0.0075 0.00 14.62

T-6 03-Oct-11 37°58.409 N 122°26.322 W 25.55 2.49 2.72 0.0061 0.00 12.66

T-7 03-Oct-11 37°59.969 N 122°24.844 W 24.28 4.62 3.07 0.0078 0.00 18.64

T-8 03-Oct-11 38°01.399 N 122°23.026 W 24.22 7.81 3.67 0.0111 0.00 12.91

T-9 03-Oct-11 38°02.536 N 122°21.104 W 22.56 5.84 2.58 0.0062 0.00 11.53

T-10 04-Oct-11 38°02.887 N 122°19.989 W 22.12 2.63 1.18 0.0065 0.00 15.56

T-11 04-Oct-11 38°02.977 N 122°19.932 W 17.89 1.95 1.81 0.0082 0.00 11.13

T-12 04-Oct-11 38°03.410 N 122°17.029 W 16.07 1.35 1.24 0.0067 0.00 13.49

T-13 04-Oct-11 38°03.729 N 122°13.730 W 15.00 1.55 1.74 0.0078 0.00 11.93

T-14 04-Oct-11 38°02.874 N 122°10.522 W 12.12 1.00 1.23 0.0074 0.00 19.46

T-15 04-Oct-11 38°02.079 N 122°08.797 W 10.18 1.06 1.17 0.0118 0.01 25.45

T-16 04-Oct-11 38°03.020 N 122°05.639 W 8.65 1.11 1.77 0.0106 0.00 25.88

T-17 04-Oct-11 38°03.825 N 122°01.609 W 4.65 1.24 2.74 0.0103 0.00 23.06

T-18 04-Oct-11 38°08.956 N 121°41.255 W ND 1.68 3.03 0.0036 0.00 4.65

T-19 04-Oct-11 38°05.102 N 121°40.982 W ND 1.82 2.40 0.0037 0.00 4.77
North San Francisco Bay Selenium Characterization Study – Draft Final Report

B-12 Prepared by Tetra Tech, Inc. on behalf of WSPA

Table B-3b (continued)

2011 Particulate Analyses: Dry Weather Transect

Station #

Sample

Date Latitude Longitude

Lab Salinity

(psu)

Chlorophyll Selenium

TSM

(mg/L)

Chl a 

(μg/L)

Phaeo a 

(μg/L)

Total Se

(μg/L) SD

T-20 04-Oct-11 38°03.810 N 121°51.527 W ND 1.72 2.17 0.0090 0.00 14.33

T-21 04-Oct-11 38°03.810 N 121°47.595 W ND 2.12 3.06 0.0078 0.00 10.62

T-22 05-Oct-11 38°02.832 N 121°53.765 W ND 2.34 6.43 0.0132 0.00 31.29

T-23 05-Oct-11 38°03.107 N 121°56.057 W ND 1.73 2.43 0.0113 0.01 18.79

T-24 05-Oct-11 38°03.592 N 121°58.442 W 2.30 1.28 4.28 0.0138 0.00 29.35

Freeport 07-Oct-11 37o 35’54.2” N 121o 23’9.7” W N/A No sample No sample 0.0162 0.01 11.29

Vernalis 07-Oct-11 37o 35’54.2” N 121o 23’9.7” W N/A No sample No sample 0.0056 0.00 6.80

Vernalis-1 06-Jul-11 37o 35’54.2” N 121o 23’9.7” W No sample No sample No sample 0.0222 0.00 22.39

Vernalis-2 06-Jul-11 37o 35’54.2” N 121o 23’9.7” W No sample No sample No sample 0.0177 0.00 15.91

Offshore-1 01-Sep-11 37o 56’ 32” N 121o 57’ 63” W 33.13 No sample No sample 0.0090 0.01 10.71

Offshore-2 01-Sep-11 37o 51’ 63” N 121o 48’ 97” W 33.40 No sample No sample 0.0064 0.00 4.25

NOTES: NA - Not Analyzed; ND - Non-detectable (Salinity, < 2 g/l; Se, < 0.0016 μg/l); Each station represents a single sample, the standard deviation (SD) was computed based on 

triplicate instrumental analyses on individual field samples. TSM refers to total suspended material, and includes mineral, organic, and living particulates in the water column. Station T1 is at Golden Gate. 
North San Francisco Bay Selenium Characterization Study – Draft Final Report

Prepared by Tetra Tech, Inc. on behalf of WSPA B-13

Table B-3b (continued)

2011 Particulate Analyses: Dry Weather Transect

Station #

Sample

Date Latitude Longitude

Lab

Salinity

(g/l)

Total 

Se

(μg/L) SD

Se IV +VI

(μg/L) SD

Se 0

(μg/L) SD

Organic Se

(μg/L) SD

Field Blank 03-Oct-11 – – ND 0.0020 0.00 ND ND 0.0020 0.00

T-1 03-Oct-11 37°49.209 N 122° 28.724 W 30.71 0.0115 0.00 0.0054 0.01 ND 0.0062 0.01

T-2 03-Oct-11 37°50.989 N 122°24.937 W 29.12 0.0102 0.00 0.0053 0.00 0.0043 0.00 ND

T-3 03-Oct-11 37°51.484 N 122°24.699 W 27.78 0.0135 0.00 0.0036 0.01 0.0095 0.00 ND

T-4 03-Oct-11 37°53.362 N 122°25.342 W 25.70 0.0127 0.00 0.0047 0.00 0.0039 0.00 0.0040 0.00

T-5 03-Oct-11 37°56.387 N 122°26.711 W 24.68 0.0075 0.00 0.0025 0.00 0.0034 0.00 ND

T-6 03-Oct-11 37°58.409 N 122°26.322 W 25.55 0.0061 0.00 0.0042 0.00 ND ND

T-7 03-Oct-11 37°59.969 N 122°24.844 W 24.28 0.0078 0.00 0.0018 0.00 0.0052 0.00 ND

T-8 03-Oct-11 38°01.399 N 122°23.026 W 24.22 0.0111 0.00 0.0037 0.00 ND 0.0074 0.00

T-9 03-Oct-11 38°02.536 N 122°21.104 W 22.56 0.0062 0.00 0.0036 0.00 0.0020 0.00 ND

T-10 04-Oct-11 38°02.887 N 122°19.989 W 22.12 0.0065 0.00 0.0031 0.00 ND 0.0033 0.00

T-11 04-Oct-11 38°02.977 N 122°19.932 W 17.89 0.0082 0.00 0.0045 0.00 ND 0.0037 0.00

T-12 04-Oct-11 38°03.410 N 122°17.029 W 16.07 0.0067 0.00 0.0019 0.00 ND 0.0048 0.00

T-13 04-Oct-11 38°03.729 N 122°13.730 W 15.00 0.0078 0.00 0.0035 0.00 ND 0.0043 0.00

T-14 04-Oct-11 38°02.874 N 122°10.522 W 12.12 0.0074 0.00 0.0037 0.00 0.0027 0.00 ND

T-15 04-Oct-11 38°02.079 N 122°08.797 W 10.18 0.0118 0.01 0.0037 0.00 0.0025 0.00 0.0055 0.00

T-16 04-Oct-11 38°03.020 N 122°05.639 W 8.65 0.0106 0.00 0.0050 0.00 ND 0.0057 0.00

T-17 04-Oct-11 38°03.825 N 122°01.609 W 4.65 0.0103 0.00 0.0027 0.00 ND 0.0076 0.00

T-18 04-Oct-11 38°08.956 N 121°41.255 W ND 0.0036 0.00 0.0050 0.00 ND ND

T-19 04-Oct-11 38°05.102 N 121°40.982 W ND 0.0037 0.00 0.0021 0.00 ND ND

T-20 04-Oct-11 38°03.810 N 121°51.527 W ND 0.0090 0.00 0.0017 0.00 ND 0.0074 0.00
North San Francisco Bay Selenium Characterization Study – Draft Final Report

B-14 Prepared by Tetra Tech, Inc. on behalf of WSPA

Table B-3b (continued)

2011 Particulate Analyses: Dry Weather Transect

Station #

Sample

Date Latitude Longitude

Lab

Salinity

(psu)

Total Se

(μg/L) SD

Se IV 

+VI

(μg/L) SD

Se 0

(μg/L) SD

Organic Se

(μg/L) SD

T-21 04-Oct-11 38°03.810 N 121°47.595 W ND 0.0078 0.00 0.0041 0.00 ND 0.0036 0.00

T-22 05-Oct-11 38°02.832 N 121°53.765 W ND 0.0132 0.00 0.0060 0.00 ND 0.0072 0.00

T-23 05-Oct-11 38°03.107 N 121°56.057 W ND 0.0113 0.01 0.0023 0.00 ND 0.0090 0.00

T-24 05-Oct-11 38°03.592 N 121°58.442 W 2.30 0.0138 0.00 0.0035 0.04 ND 0.0103 0.00

Freeport 07-Oct-11 37o 35’54.2” N 121o 23’9.7” W N/A 0.0162 0.01 0.0035 0.00 ND 0.0127 0.00

Vernalis 07-Oct-11 37o 35’54.2” N 121o 23’9.7” W N/A 0.0056 0.00 0.0055 0.00 ND ND

Vernalis-1 06-Jul-11 37o 35’54.2” N 121o 23’9.7” W No 

sample 0.0222 0.00 0.0019 0.00 ND 0.0204 0.00

Vernalis-2 06-Jul-11 37o 35’54.2” N 121o 23’9.7” W No 

sample 0.0177 0.00 0.0026 0.00 ND 0.0151 0.00

Offshore-1 01-Sep-11 37o 56’ 32” N 121o 57’ 63” W 33.13 0.0090 0.01 ND 0.00 0.0081 0.00 ND

Offshore-2 01-Sep-11 37o 51’ 63” N 121o 48’ 97” W 33.40 0.0064 0.00 ND 0.00 0.0064 0.00 ND

NOTES: NA - Not Analyzed; ND - Non-detectable (Salinity, < 2 g/l; Se, < 0.0004 μg/l); Each station represents a single sample, the standard deviation (SD) was computed based on 

triplicate instrumental analyses on individual field samples. No Filter: for two river station samples insufficient cleaned filters were available for the last day of sampling. Station T-1 is at 

Golden Gate, Station T-18 is at Rio Vista.
North San Francisco Bay Selenium Characterization Study – Draft Final Report

Prepared by Tetra Tech, Inc. on behalf of WSPA B-15

Table B-4a

2010 Dry Weather Dissolved and Particulate Analyses: Locations near the Five Refinery Outfalls

Station # Sample Date Latitude Longitude

Salinity

(psu) Selenium Dissolved Selenium Particulate

TSM

(mg/L)

Laboratory

Salinity

Total Se

(μg/L) SD

Total Se

(μg/L) SD

Val-01 13-Sep-10 38°03'18" N 122°07'12" W 14.39 0.114 0.03 0.012 0.000 24.9

Val-02 13-Sep-10 38°03'18" N 122°07'11" W 14.11 0.230 0.05 0.014 0.000 23.0

Val-03 13-Sep-10 38°03'18" N 122°07'12" W 14.28 0.206 0.00 0.009 0.000 36.2

Tes-01 9-Sep-10 38°02'57" N 122°05'27" W 17.61 0.149 0.06 0.019 0.000 63.5

Tes-02 9-Sep-10 38°02'57" N 122°05'27" W 17.64 0.137 0.02 0.019 0.002 33.9

Tes-03 9-Sep-10 38°02'57" N 122°05'27" W 17.43 0.182 0.02 0.043 0.003 57.7

Shell-01 9-Sep-10 38°01'56" N 122°07'49" W 20.86 0.351 0.01 0.007 0.000 31.2

Shell-02 9-Sep-10 38°01'56" N 122°07'49" W 20.99 0.176 0.05 0.004 0.000 25.9

Shell-03 9-Sep-10 38°01'56" N 122°07'48" W 20.84 0.193 0.01 0.008 0.000 29.4

P66-01 13-Sep-10 38°03'21" N 122°15'41" W 23.91 0.122 0.00 0.007 0.000 19.2

P66-02 13-Sep-10 38°03'21" N 122°15'41" W 23.38 0.228 0.02 0.003 0.000 14.6

P66-03 13-Sep-10 38°03'21" N 122°15'40" W 23.74 0.107 0.02 0.008 0.000 22.6

Chev-02 9-Sep-10 37°58'11" N 122°25'41" W 30.19 0.148 0.04 0.014 0.000 26.4

Chev-01 9-Sep-10 37°58'11" N 122°25'41" W 30.06 0.174 0.02 0.005 0.000 21.1

Chev-03 9-Sep-10 37°58'11" N 122°25'40" W 30.14 0.113 0.02 0.009 0.000 27.7

Detection Limits: 0.0016 μg/l for dissolved species, and 0.0004 μg/l for particulate species (see Chapter 3).
North San Francisco Bay Selenium Characterization Study – Draft Final Report

B-16 Prepared by Tetra Tech, Inc. on behalf of WSPA

Table B-4a (continued)

2010 Dry Weather Dissolved and Particulate Analyses: Locations Near the Five Refinery Outfalls

Station #

Sample

Date Latitude Longitude

Selenium Dissolved Selenium Particulate

Se IV

(ug/L) SD

Se VI

(ug/L) SD

Organic 

Se

(ug/L) SD

Se IV 

+VI

(μg/L) SD

Se 0

(μg/L) SD

Organic 

Se

(μg/L) SD

Val-01 13-Sep-10 38°03'18" N 122°07'12" W 0.014 0.000 0.077 0.001 0.023 0.003 0.003 0.000 NO 

FILTER 0.009 0.000

Val-02 13-Sep-10 38°03'18" N 122°07'11" W 0.003 0.002 0.191 0.002 0.037 0.004 0.007 0.000 NO 

FILTER 0.007 0.001

Val-03 13-Sep-10 38°03'18" N 122°07'12" W 0.002 0.000 0.160 0.005 0.044 0.005 0.003 0.000 NO 

FILTER 0.006 0.000

Tes-01 9-Sep-10 38°02'57" N 122°05'27" W 0.016 0.001 0.088 0.002 0.045 0.004 0.004 0.000 NO 

FILTER 0.015 0.000

Tes-02 9-Sep-10 38°02'57" N 122°05'27" W 0.024 0.001 0.080 0.001 0.033 0.001 NO 

FILTER

Tes-03 9-Sep-10 38°02'57" N 122°05'27" W 0.028 0.000 0.113 0.002 0.041 0.003 0.012 0.001 NO 

FILTER 0.032 0.003

Shell-01 9-Sep-10 38°01'56" N 122°07'49" W 0.052 0.005 0.252 0.005 0.047 0.002 0.002 0.000 NO 

FILTER 0.005 0.000

Shell-02 9-Sep-10 38°01'56" N 122°07'49" W 0.040 0.002 0.108 0.002 0.028 0.005 0.002 0.000 NO 

FILTER 0.002 0.000

Shell-03 9-Sep-10 38°01'56" N 122°07'48" W 0.039 0.000 0.142 0.001 0.012 0.001 0.004 0.000 NO 

FILTER 0.003 0.000

P66-01 13-Sep-10 38°03'21" N 122°15'41" W 0.020 0.000 0.079 0.001 0.028 0.001 0.003 0.000 NO 

FILTER 0.004 0.000

P66-02 13-Sep-10 38°03'21" N 122°15'41" W 0.008 0.000 0.195 0.001 0.024 0.002 0.004 0.000 NO 

FILTER ND

P66-03 13-Sep-10 38°03'21" N 122°15'40" W 0.021 0.000 0.064 0.000 0.022 0.002 0.007 0.000 NO 

FILTER ND

Chev-02 9-Sep-10 37°58'11" N 122°25'41" W 0.066 0.002 0.047 0.004 0.038 0.004 0.002 0.000 ND 0.012 0.000

Chev-01 9-Sep-10 37°58'11" N 122°25'41" W 0.104 0.007 0.055 0.007 0.019 0.002 0.003 0.000 ND ND

Chev-03 9-Sep-10 37°58'11" N 122°25'40" W 0.038 0.001 0.049 0.001 0.023 0.002 0.002 0.000 ND 0.008 0.000
North San Francisco Bay Selenium Characterization Study – Draft Final Report

Prepared by Tetra Tech, Inc. on behalf of WSPA B-17

Table B-4b

2011 Dry Weather Dissolved and Particulate Analyses: Locations near the Five Refinery Outfalls

Station # Sample Date Latitude Longitude

Salinity

(psu)

Selenium

Dissolved

Selenium

Particulate

TSM

(mg/L)

Laboratory

Salinity

Total Se

(μg/L) SD

Total Se

(μg/L) SD

Val-01 06-Oct-11 38°03.305 N 122°07.196 W 5.62 0.0975 0.01 0.034 0.04 122.6

Val-02 06-Oct-11 38°03.312 N 122°07.190 W 6.38 0.1031 0.01 0.036 0.01 139.5

Val-03 06-Oct-11 38°03.316 N 122°07.189 W 8.40 0.0972 0.04 0.046 0.00 190.9

Tes-01 06-Oct-11 38o 02.950 N 122o05.435 W 10.98 0.1118 0.02 0.022 0.00 72.4

Tes-02 06-Oct-11 38o 02.948 N 122o05.448 W 10.66 0.0976 0.02 0.020 0.01 66.2

Tes-03 06-Oct-11 38o 02.947 N 122o05.463 W 10.44 0.2708 0.03 0.020 0.00 41.3

Shell-01 05-Oct-11 38°01.934 N 122°07.818 W 15.42 0.1384 0.02 0.014 0.00 41.5

Shell-02 05-Oct-11 38°01.937 N 122°07.812 W 15.59 0.1138 0.01 0.011 0.00 35.5

Shell-03 05-Oct-11 38°01.940 N 122°07.806 W 16.00 0.1054 0.02 0.016 0.00 46.8

P66-01 11-Oct-11 38°03.348 N 122°15.686 W 16.07 0.1125 0.04 0.011 0.00 32.3

P66-02 11-Oct-11 38°03.349 N 122°15.679 W 16.28 No sample 0.011 0.00 28.3

P66-03 11-Oct-11 38°03.350 N 122°15.672 W 16.35 0.0975 0.03 0.009 0.00 26.6

Chev-01 03-Oct-11 37°58.179 N 122°25.679 W 27.63 0.0803 0.04 0.008 0.00 26.2

Chev-02 03-Oct-11 37°58.189 N 122°25.672 W 26.90 0.0769 0.01 0.007 0.00 20.4

Chev-03 03-Oct-11 37°58.177 N 122°25.677 W 28.15 0.0975 0.02 0.010 0.01 23.7

Detection Limits: 0.0016 μg/l for dissolved species, and 0.0004 μg/l for particulate species (see Chapter 3).
North San Francisco Bay Selenium Characterization Study – Draft Final Report

B-18 Prepared by Tetra Tech, Inc. on behalf of WSPA

Table B-4b (continued)

2011 Dry Weather Dissolved and Particulate Analyses: Locations Near the Five Refinery Outfalls

Station # Sample Date Latitude Longitude

Selenium Dissolved Selenium Particulate

Se IV

(ug/L) SD

Se VI

(ug/L) SD

Organic 

Se

(ug/L) SD

Se IV 

+VI

(μg/L) SD

Se 0

(μg/L) SD

Organic 

Se

(μg/L) SD

Val-01 06-Oct-11 38°03.305 N 122°07.196 W 0.0209 0.00 0.0313 0.01 0.0453 0.02 0.005 0.00 ND 0.029 0.03

Val-02 06-Oct-11 38°03.312 N 122°07.190 W 0.0194 0.00 0.0367 0.01 0.0470 0.02 0.004 0.00 ND 0.033 0.01

Val-03 06-Oct-11 38°03.316 N 122°07.189 W 0.0236 0.01 0.0427 0.04 0.0309 0.05 0.003 0.00 0.004 0.00 0.039 0.00

Tes-01 06-Oct-11 38o 02.950 N 122o05.435 W 0.0211 0.01 0.0536 0.04 0.0371 0.04 0.002 0.00 ND 0.020 0.00

Tes-02 06-Oct-11 38o 02.948 N 122o05.448 W 0.0175 0.00 0.0502 0.02 0.0299 0.03 0.004 0.01 ND 0.016 0.00

Tes-03 06-Oct-11 38o 02.947 N 122o05.463 W 0.0376 0.01 0.1058 0.07 0.1274 0.07 0.002 0.00 ND 0.018 0.00

Shell-01 05-Oct-11 38°01.934 N 122°07.818 W 0.0308 0.01 0.0783 0.03 0.0293 0.04 0.004 0.00 ND 0.011 0.00

Shell-02 05-Oct-11 38°01.937 N 122°07.812 W 0.0242 0.02 0.0521 0.02 0.0374 0.02 0.004 0.00 ND 0.007 0.00

Shell-03 05-Oct-11 38°01.940 N 122°07.806 W 0.0228 0.00 0.0564 0.04 0.0261 0.04 0.004 0.00 ND 0.013 0.00

P66-01 11-Oct-11 38°03.348 N 122°15.686 W 0.0221 0.01 0.0544 0.01 0.0360 0.04 0.004 0.00 ND 0.007 0.00

P66-02 11-Oct-11 38°03.349 N 122°15.679 W No 

sample

No 

sample

No 

sample 0.003 0.00 ND 0.008 0.00

P66-03 11-Oct-11 38°03.350 N 122°15.672 W 0.0226 0.00 0.0467 0.04 0.0282 0.05 0.004 0.00 ND 0.005 0.00

Chev-01 03-Oct-11 37°58.179 N 122°25.679 W 0.0184 0.00 0.0407 0.02 0.0213 0.04 0.002 0.00 ND 0.006 0.00

Chev-02 03-Oct-11 37°58.189 N 122°25.672 W 0.0178 0.01 0.0463 0.02 0.0129 0.02 0.002 0.00 ND 0.005 0.00

Chev-03 03-Oct-11 37°58.177 N 122°25.677 W 0.0336 0.00 0.0411 0.00 0.0228 0.02 0.002 0.00 ND 0.008 0.00
North San Francisco Bay Selenium Characterization Study – Draft Final Report

Prepared by Tetra Tech, Inc. on behalf of WSPA B-19

Table B-5a

2010 Dry Weather Refinery Receiving Water Station Tidal Stages and Depths

Refinery Station ID Tide Stage Current

Station

Depth (ft)

Sample

Depth (ft)

Valero VAL-012 Flood Up 28 18

Valero VAL-02 Flood Down 29 20

Valero VAL-03 Flood Down 28 20

Tesoro Tes-01 Ebb Down 58 40

Tesoro Tes-02 Ebb Outfall 73 40

Tesoro Tes-031 Ebb Down 72 46

Shell SHELL-01 Ebb Down 32 18

Shell SHELL-021 Ebb Outfall 39 20

Shell SHELL-03 Ebb Up 37 19

Phillips 66 P66-01 Ebb Down 48 30

Phillips 66 P66-021 Ebb Outfall 48 30

Phillips 66 P66-03 Ebb Up 46 30

Chevron CHEV-01 Slack Slack 51 30

Chevron CHEV-021 Slack Outfall 50 30

Chevron CHEV-03 Slack Slack 50 30

NOTES: 

1

Diffuser center-line station 2

Station is approximately 20 m NW of diffuser centerline 

Table B-5b

2011 Dry Weather Refinery Receiving Water Station Tidal Stages and Depths

Refinery Station ID Tide Stage Current

Station

Depth (ft)

Sample

Depth (ft)

Valero VAL-01 Flood Down 27.3 18

Valero VAL-021 Flood Outfall 26.5 18

Valero VAL-03 Flood Up 26.3 18

Tesoro Tes-01 Slack Slack 64.8 40

Tesoro Tes-021 Slack Outfall 67.2 40

Tesoro Tes-03 Slack Slack 70 40

Shell SHELL-01 Slack Slack 55.8 30

Shell SHELL-021 Slack Outfall 56 30

Shell SHELL-03 Slack Slack 57.6 30

Phillips 66 P66-01 Slack Slack 47.2 30

Phillips 66 P66-021 Slack Outfall 36 23

Phillips 66 P66-03 Slack Slack 29.6 20

Chevron CHEV-01 Ebb Up 44 35

Chevron CHEV-021 Ebb Outfall 46 30

Chevron CHEV-03 Ebb Down 44.5 35

NOTES: 

1

Diffuser center-line station
North San Francisco Bay Selenium Characterization Study – Draft Final Report

B-20 Prepared by Tetra Tech, Inc. on behalf of WSPA

Table B-6a

2011 Wet Weather Dissolved Analyses: Transect

Station #

Sample

Date Latitude Longitude

Salinity (psu) Selenium

Field 

Salinity

Lab 

Salinity

Se IV 

(μg/L) SD

Se VI 

(μg/L) SD

Total Se 

(μg/L) SD

Organic 

Se (μg/L) SD

Field Blank1 15-Mar-11 0.31 0.01 0.34 0.02 0.65 0.00 ND

T-1 14-Mar-11 37°49'23" N 122°28'43" W 24.1 24.81 0.016 0.001 0.053 0.002 0.102 0.000 0.033 0.001

T-2 14-Mar-11 37°49'93" N 122°26'59" W 23.1 24.52 0.019 0.000 0.063 0.003 0.097 0.001 0.016 0.003

T-3 14-Mar-11 37°50'65" N 122°26'05" W 21.7 21.06 0.016 0.001 0.064 0.001 0.105 0.001 0.025 0.002

T-4 14-Mar-11 37°50'45" N 122°26'92" W 18.9 19.23 0.015 0.001 0.072 0.001 0.098 0.002 0.011 0.002

T-5 14-Mar-11 37°52'33" N 122°24'72" W 18.8 18.26 0.016 0.000 0.058 0.000 0.107 0.003 0.032 0.003

T-6 14-Mar-11 37°54'23" N 122°25'28" W 21.3 22.45 0.018 0.000 0.044 0.001 0.088 0.005 0.027 0.005

T-7 14-Mar-11 37°56'18" N 122°25'66" W 18.2 17.59 0.024 0.001 0.052 0.001 0.093 0.002 0.017 0.002

T-8 14-Mar-11 37°56'35" N 122°25'07" W 16.8 16.39 0.020 0.000 0.058 0.001 0.115 0.001 0.037 0.001

T-9 14-Mar-11 37°57'21" N 122°26'25" W 14.7 14.21 Bottle broken during shipping

T-10 14-Mar-11 37°57'24" N 122°26'17" W 13.3 12.41 0.018 0.000 0.049 0.002 0.121 0.002 0.054 0.003

T-11 14-Mar-11 38°01'21" N 122°23'70" W 12.5 11.92 0.019 0.001 0.076 0.001 0.093 0.001 ND

T-12 14-Mar-11 38°03'13" N 122°19'51" W 9.22 8.57 0.017 0.000 0.089 0.002 0.123 0.005 0.014 0.005

T-13 15-Mar-11 38°08'95" N 121°41'31" W 0.1 ND 0.015 0.000 0.059 0.002 0.083 0.002 0.009 0.002

T-14 15-Mar-11 38°05'05" N 121°40'99" W 0.09 ND 0.013 0.000 0.077 0.002 0.128 0.004 0.038 0.004

T-15 15-Mar-11 38°03'93" N 121°51'35" W 0.91 ND 0.017 0.000 0.052 0.000 0.093 0.001 0.024 0.001

T-16 15-Mar-11 38°03'33" N 121°56'66" W 0.91 ND 0.013 0.001 0.074 0.002 0.093 0.002 ND

T-17 15-Mar-11 38°03'72" N 122°01'54" W 0.92 ND 0.012 0.001 0.059 0.001 0.107 0.002 0.036 0.002

T-18 15-Mar-11 38°04'65" N 122°03'00" W 1.1 ND 0.016 0.001 0.071 0.005 0.114 0.002 0.028 0.005

T-19 15-Mar-11 38°03'57" N 122°12'48" W 7.25 7.24 0.017 0.000 0.063 0.004 0.101 0.004 0.021 0.005

T-20 15-Mar-11 38°03'80" N 122°14'17" W 7.62 7.46 0.022 0.001 0.060 0.002 0.101 0.003 0.019 0.004

Freeport 18-Mar-11 38°38'34" N 121°51'93" W 0.3 NA 0.004 0.000 0.024 0.001 0.062 0.003 0.033 0.004

Vernalis 18-Mar-11 37°65'64" N 121°24'05" W 0.16 NA 0.031 0.001 0.293 0.002 0.317 0.007 ND

NOTES: NA - Not Analyzed; ND - Non-detectable (for P, <0.02 μM; Si, < 1 μM; Salinity, < 2 g/l; Se, < 0.0016 μg/l); Each station represents a single sample, the standard deviation 

(SD) was computed based on triplicate instrumental analyses on individual field samples. T-1 represents Golden Gate, as in the 2010 sampling; however, Rio Vista is sample T-13. 1

Field blank concentrations in the transect sampling are exceedingly high, and twice as high as the highest sampled concentration. The reason for this discrepancy is not known.
North San Francisco Bay Selenium Characterization Study – Draft Final Report

Prepared by Tetra Tech, Inc. on behalf of WSPA. B-21

Table B-6b

2012 Wet Weather Dissolved Analyses: Transect

Station #

Sample

Date Latitude Longitude

Salinity (psu) Selenium

Field 

Salinity

Lab 

Salinity

Se IV 

(μg/L) SD

Se VI 

(μg/L) SD

Total 

Se 

(μg/L) SD

Organic 

Se (μg/L) SD

Field Blank 10-Apr-12 – – – – ND ND ND ND

T-1 10-Apr-12 37°49.114 N 122°28.690 W 28.20 27.89 0.02 0.01 0.06 0.06 0.10 0.01 0.02 0.06

T-2 10-Apr-12 37°50.134 N 122°26.496 W 27.50 27.43 0.02 0.01 0.05 0.03 0.10 0.05 0.02 0.05

T-3 10-Apr-12 37°50.977 N 122°24.922 W 25.50 25.66 0.03 0.00 0.05 0.03 0.12 0.05 0.04 0.06

T-4 10-Apr-12 37°51.321 N 122°24.695 W 23.70 23.51 0.03 0.03 0.05 0.04 0.10 0.03 0.02 0.03

T-5 10-Apr-12 37°53.228 N 122°25.339 W 22.30 22.09 0.03 0.03 0.05 0.05 0.11 0.03 0.03 0.05

T-6 10-Apr-12 37°54.702 N 122°26.011 W 20.30 20.24 0.03 0.02 0.05 0.03 0.10 0.03 0.02 0.04

T-7 10-Apr-12 37°56.713 N 122°26.686 W 18.70 18.66 0.02 0.01 0.06 0.04 0.11 0.06 0.03 0.07

T-8 11-Apr-12 38°02.759 N 121°53.903 W 0.19 ND 0.01 0.01 0.05 0.03 0.09 0.01 0.03 0.03

T-9 11-Apr-12 38°03.142 N 121°56.400 W 0.14 ND 0.01 0.02 0.05 0.02 0.11 0.03 0.04 0.03

T-10 11-Apr-12 38°03.608 N 121°58.884 W 0.29 ND 0.01 0.01 0.06 0.04 0.10 0.03 0.03 0.05

T-11 11-Apr-12 38°03.737 N 122°01.406 W 0.25 ND 0.01 0.01 0.05 0.03 0.10 0.02 0.04 0.03

T-12 12-Apr-12 37°58.528 N 122°25.868 W 22.40 21.92 0.03 0.01 0.05 0.04 0.10 0.04 ND 0.05

T-13 12-Apr-12 38°00.655 N 122.24.239 W 21.80 22.00 0.03 0.02 0.06 0.05 0.12 0.07 0.03 0.08

T-14 12-Apr-12 38°02.156 N 122°21.676 W 12.70 12.31 0.03 0.01 0.06 0.01 0.12 0.04 0.04 0.04

T-15 12-Apr-12 38°03.255 N 122°18.834 W 13.40 13.70 0.03 0.01 0.05 0.03 0.13 0.03 0.05 0.04

T-16 12-Apr-12 38°03.674 N 122°15.692 W 11.70 12.08 0.03 0.01 0.05 0.04 0.11 0.08 0.03 0.09

T-17 12-Apr-12 38°03.630 N 122°12.545 W 9.00 9.04 0.02 0.02 0.06 0.07 0.12 0.03 0.04 0.07

T-18 12-Apr-12 38°02.202 N 122°10.146 W 7.50 7.60 0.02 0.00 0.06 0.05 0.12 0.04 0.03 0.06

T-19 12-Apr-12 38°02.743 N 122°06.188 W 1.90 3.60 0.02 0.00 0.06 0.02 0.12 0.10 0.04 0.10

T-20 (USGS 757) 11-Apr-12 38°08.938 N 121°41.367 W 0.09 ND 0.01 0.01 0.04 0.02 0.09 0.04 0.03 0.04

T-21 (Rio Vista) 11-Apr-12 38°05.069 N 121°40.972 W 0.09 ND 0.02 0.00 0.06 0.04 0.10 0.05 0.02 0.06

Freeport 16-Apr-12 38°22.993 N 121°31.144 W 0.06 NC 0.01 0.00 0.04 0.04 0.09 0.05 0.04 0.07

Vernalis 16-Apr-12 37°39.430 N 121°14.429 W 0.45 NC 0.06 0.01 0.33 0.16 0.47 0.14 0.08 0.21

NOTES: NA - Not Analyzed; ND - Non-detectable (for P, <0.02 μM; Si, < 1 μM; Salinity, < 2 g/l; Se, < 0.0016 μg/l); Each station represents a single sample, the standard deviation 

(SD) was computed based on triplicate instrumental analyses on individual field samples. T-1 represents Golden Gate.
North San Francisco Bay Selenium Characterization Study – Draft Final Report

A-22 Prepared by Tetra Tech, Inc. on behalf of WSPA

Table B-7a

2011 Wet Weather Ancillary Parameters: Transect

Station #

Sample

Date Latitude Longitude

Salinity (psu) Nutrients

Field

Salinity

Lab

Salinity

Phosphate 

(μmol/L) SD

Nitrate 

+ Nitrite 

(μmol/L) SD

Silicate 

(μmol/L) SD

Field Blank 0.00 0.00 0.03 0.03 0.16 0.11

T-1 14-Mar-11 37°49'23" N 122°28'43" W 24.1 24.81 1.60 0.00 18.79 0.06 61.56 2.23

T-2 14-Mar-11 37°49'93" N 122°26'59" W 23.1 24.52 1.67 0.01 19.05 0.04 67.42 1.69

T-3 14-Mar-11 37°50'65" N 122°26'05" W 21.7 21.06 1.72 0.00 21.30 0.04 90.83 1.90

T-4 14-Mar-11 37°50'45" N 122°26'92" W 18.9 19.23 1.71 0.00 22.06 0.04 103.74 1.68

T-5 14-Mar-11 37°52'33" N 122°24'72" W 18.8 18.26 1.72 0.01 22.34 0.05 123.78 0.18

T-6 14-Mar-11 37°54'23" N 122°25'28" W 21.3 22.45 1.27 0.01 16.99 0.01 71.47 0.08

T-7 14-Mar-11 37°56'18" N 122°25'66" W 18.2 17.59 1.71 0.01 23.01 0.03 129.88 0.08

T-8 14-Mar-11 37°56'35" N 122°25'07" W 16.8 16.39 1.72 0.00 22.90 0.06 128.70 0.05

T-9 14-Mar-11 37°57'21" N 122°26'25" W 14.7 14.21 1.70 0.00 24.00 0.01 141.07 0.31

T-10 14-Mar-11 37°57'24" N 122°26'17" W 13.3 12.41 1.75 0.00 25.87 0.04 136.85 0.04

T-11 14-Mar-11 38°01'21" N 122°23'70" W 12.5 11.92 1.80 0.01 25.44 0.01 177.35 0.04

T-12 14-Mar-11 38°03'13" N 122°19'51" W 9.22 8.57 1.86 0.02 27.21 0.04 188.46 0.28

T-13 15-Mar-11 38°08'95" N 121°41'31" W 0.1 ND 1.65 0.00 17.91 0.06 258.30 0.14

T-14 15-Mar-11 38°05'05" N 121°40'99" W 0.09 ND 1.50 0.00 29.91 0.23 219.06 0.75

T-15 15-Mar-11 38°03'93" N 121°51'35" W 0.91 ND 1.58 0.00 21.57 0.04 260.41 0.04

T-16 15-Mar-11 38°03'33" N 121°56'66" W 0.91 ND 1.54 0.00 22.01 0.02 256.44 0.11

T-17 15-Mar-11 38°03'72" N 122°01'54" W 0.92 ND 1.77 0.00 31.55 0.02 222.18 0.17

T-18 15-Mar-11 38°04'65" N 122°03'00" W 1.1 ND 1.60 0.00 29.29 0.05 235.83 0.26

T-19 15-Mar-11 38°03'57" N 122°12'48" W 7.25 7.24 1.88 0.01 26.55 0.03 209.13 0.02

T-20 15-Mar-11 38°03'80" N 122°14'17" W 7.62 7.46 1.79 0.01 27.06 0.02 201.54 0.13

Freeport 18-Mar-11 38°38'34" N 121°51'93" W 0.3 ND NA

Vernalis 18-Mar-11 37°65'64" N 121°24'05" W 0.16 ND NA

NOTES: NA - Not Analyzed; ND - Non-detectable (for P, <0.02 μM; Si, < 1 μM; Salinity, < 2 g/l; Se, < 0.0016 μg/l); Each station represents a single sample, the standard deviation 

(SD) was computed based on triplicate instrumental analyses on individual field samples. T-1 represents Golden Gate, as in the 2010 sampling; however, Rio Vista is sample T-13.
North San Francisco Bay Selenium Characterization Study – Draft Final Report

Prepared by Tetra Tech, Inc. on behalf of WSPA. B-23

Table B-7b

2012 Wet Weather Ancillary Parameters: Transect

Station #

Sample

Date Latitude Longitude

Salinity (psu) Nutrients

Field

Salinity

Lab

Salinity

Phosphate 

(μmol/L) SD

Nitrate

+ Nitrite 

(μmol/L) SD

Silicate 

(μmol/L) SD

Field Blank 10-Apr-12 – – – – 0.05 0.07 0.01 0.01 0.72 0.24

T-1 10-Apr-12 37°49.114 N 122°28.690 W 28.20 27.89 1.16 0.00 14.82 0.04 37.19 0.02

T-2 10-Apr-12 37°50.134 N 122°26.496 W 27.50 27.43 0.92 0.02 10.92 0.01 28.06 0.05

T-3 10-Apr-12 37°50.977 N 122°24.922 W 25.50 25.66 1.08 0.07 14.26 0.02 52.02 0.04

T-4 10-Apr-12 37°51.321 N 122°24.695 W 23.70 23.51 1.24 0.01 16.79 0.02 61.40 0.14

T-5 10-Apr-12 37°53.228 N 122°25.339 W 22.30 22.09 0.84 0.01 12.31 0.01 55.15 0.11

T-6 10-Apr-12 37°54.702 N 122°26.011 W 20.30 20.24 1.04 0.01 15.29 0.01 68.18 0.13

T-7 10-Apr-12 37°56.713 N 122°26.686 W 18.70 18.66 1.53 0.00 22.32 0.02 103.26 0.06

T-8 11-Apr-12 38°02.759 N 121°53.903 W 0.19 ND 1.98 0.01 31.71 0.07 255.83 0.15

T-9 11-Apr-12 38°03.142 N 121°56.400 W 0.14 ND 1.93 0.01 30.58 0.07 252.91 0.29

T-10 11-Apr-12 38°03.608 N 121°58.884 W 0.29 ND 2.19 0.01 33.33 0.05 291.40 0.17

T-11 11-Apr-12 38°03.737 N 122°01.406 W 0.25 ND 2.09 0.00 32.33 0.04 272.19 0.28

T-12 12-Apr-12 37°58.528 N 122°25.868 W 22.40 21.92 1.63 0.01 21.97 0.05 88.13 0.06

T-13 12-Apr-12 38°00.655 N 122.24.239 W 21.80 22.00 1.68 0.01 22.24 0.03 90.86 0.05

T-14 12-Apr-12 38°02.156 N 122°21.676 W 12.70 12.31 1.48 0.00 24.55 0.04 167.83 0.16

T-15 12-Apr-12 38°03.255 N 122°18.834 W 13.40 13.70 1.51 0.00 21.28 0.05 125.03 0.02

T-16 12-Apr-12 38°03.674 N 122°15.692 W 11.70 12.08 2.09 0.04 30.74 0.04 158.14 0.04

T-17 12-Apr-12 38°03.630 N 122°12.545 W 9.00 9.04 2.41 0.01 36.00 0.04 206.87 0.10

T-18 12-Apr-12 38°02.202 N 122°10.146 W 7.50 7.60 1.20 0.00 20.93 0.02 206.32 0.31

T-19 12-Apr-12 38°02.743 N 122°06.188 W 1.90 3.60 1.28 0.03 18.95 0.01 171.71 0.10

T-20 (USGS 757) 11-Apr-12 38°08.938 N 121°41.367 W 0.09 ND 1.71 0.02 28.86 0.03 230.69 0.26

T-21 (Rio Vista) 11-Apr-12 38°05.069 N 121°40.972 W 0.09 ND 1.86 0.02 21.97 0.02 268.65 0.27

Freeport 16-Apr-12 38°22.993 N 121°31.144 W 0.06 NC 1.27 0.01 12.01 0.05 235.87 0.47

Vernalis 16-Apr-12 37°39.430 N 121°14.429 W 0.45 NC 2.38 0.00 135.06 0.30 203.10 0.28

NOTES: NA - Not Analyzed; ND - Non-detectable (for P, <0.02 μM; Si, < 1 μM; Salinity, < 2 g/l; Se, < 0.0016 μg/l); Each station represents a single sample, the standard deviation 

(SD) was computed based on triplicate instrumental analyses on individual field samples. T-1 represents Golden Gate.
North San Francisco Bay Selenium Characterization Study – Draft Final Report

A-24 Prepared by Tetra Tech, Inc. on behalf of WSPA

Table B-8a

2011 Wet Weather Particulate Analyses: Transect

Station #

Sample

Date Latitude Longitude

Lab

Salinity (psu)

Chlorophyll Selenium TSM

Chl a (μg/L) Phaeo a (μg/L) Total Se (μg/L) SD (mg/L)

Field Blank ND 2.8 ND 0.6

T-1 14-Mar-11 37°49'23" N 122°28'43" W 24.81 6.6 4.9 0.009 0.0001 28.7

T-2 14-Mar-11 37°49'93" N 122°26'59" W 24.52 9.2 6.2 ND 17.5

T-3 14-Mar-11 37°50'65" N 122°26'05" W 21.06 12.5 4.0 0.006 0.0001 16.4

T-4 14-Mar-11 37°50'45" N 122°26'92" W 19.23 10.2 7.3 ND 21.3

T-5 14-Mar-11 37°52'33" N 122°24'72" W 18.26 17.0 11.6 0.006 0.0001 21.2

T-6 14-Mar-11 37°54'23" N 122°25'28" W 22.45 7.4 3.6 0.008 0.0006 29.6

T-7 14-Mar-11 37°56'18" N 122°25'66" W 17.59 10.1 11.7 0.008 0.0001 30.1

T-8 14-Mar-11 37°56'35" N 122°25'07" W 16.39 6.8 7.3 0.005 0.0000 25.7

T-9 14-Mar-11 37°57'21" N 122°26'25" W 14.21 4.9 5.6 0.002 0.0002 20.6

T-10 14-Mar-11 37°57'24" N 122°26'17" W 12.41 4.7 9.2 0.009 0.0002 19.3

T-11 14-Mar-11 38°01'21" N 122°23'70" W 11.92 3.8 7.3 0.006 0.0006 19.7

T-12 14-Mar-11 38°03'13" N 122°19'51" W 8.57 4.7 6.6 0.003 0.0001 29.6

T-13 15-Mar-11 38°08'95" N 121°41'31" W ND 10.1 5.7 0.002 0.0003 2.51

T-14 15-Mar-11 38°05'05" N 121°40'99" W ND 3.6 8.7 0.014 0.0004 7.71

T-15 15-Mar-11 38°03'93" N 121°51'35" W ND 4.7 9.2 0.003 0.0001 11.9

T-16 15-Mar-11 38°03'33" N 121°56'66" W ND 7.9 7.8 0.003 0.0001 11.9

T-17 15-Mar-11 38°03'72" N 122°01'54" W ND 7.4 9.7 0.008 0.0004 21

T-18 15-Mar-11 38°04'65" N 122°03'00" W ND 5.0 6.7 0.005 0.0002 16.4

T-19 15-Mar-11 38°03'57" N 122°12'48" W 7.24 36.1 6.6 0.010 0.0004 13.1

T-20 15-Mar-11 38°03'80" N 122°14'17" W 7.46 15.7 6.8 0.007 0.0001 10.71

Freeport 18-Mar-11 38°38'34" N 121°51'93" W NA NA NA 0.024 0.0004 27.7

Vernalis 18-Mar-11 37°65'64" N 121°24'05" W NA NA NA 0.014 0.0003 9.72

NOTES: NA - Not Analyzed; ND - Non-detectable (Salinity, < 2 g/l; Se, < 0.0016 μg/l); Each station represents a single sample, the standard deviation (SD) was computed based on 

triplicate instrumental analyses on individual field samples. TSM refers to total suspended material, and includes mineral, organic, and living particulates in the water column. T-1 

represents Golden Gate, as in the 2010 sampling; however, Rio Vista is sample T-13. 1

Observations of anomalously low TSM values occurred at four transect locations, which may be related to the filtration performed during sampling. Additional work needs to be 

completed to identify the cause of these low TSM values, and in future, it is possible that data from the affected stations will not be considered for the transect analysis. Following this 

sampling, the method was modified to reduce the pressure used for filtering, and an additional staff member was added to the sampling team to allow more attention to be given to the 

filtration performed on board the sampling vessel. 
North San Francisco Bay Selenium Characterization Study – Draft Final Report

Prepared by Tetra Tech, Inc. on behalf of WSPA. B-25

Table B-8a (continued)

2011 Wet Weather Particulate Analyses: Transect

Station #

Sample

Date Latitude Longitude

Lab

Salinity

Total Se1

(μg/L) SD

Se IV +VI

(μg/L) SD

Se 0

(μg/L) SD

Organic Se

(μg/L) SD

Field Blank 15-Mar-11 - - - ND ND ND ND

T-1 14-Mar-11 37°49'23" N 122°28'43" W 24.81 0.009 0.000 ND ND 0.009 0.000

T-2 14-Mar-11 37°49'93" N 122°26'59" W 24.52 ND ND ND ND

T-3 14-Mar-11 37°50'65" N 122°26'05" W 21.06 0.006 0.000 0.002 0.000 ND 0.004 0.000

T-4 14-Mar-11 37°50'45" N 122°26'92" W 19.23 ND ND ND ND

T-5 14-Mar-11 37°52'33" N 122°24'72" W 18.26 0.006 0.000 0.003 0.000 ND 0.003 0.000

T-6 14-Mar-11 37°54'23" N 122°25'28" W 22.45 0.008 0.001 0.005 0.000 ND 0.003 0.001

T-7 14-Mar-11 37°56'18" N 122°25'66" W 17.59 0.008 0.000 0.003 0.000 ND 0.004 0.000

T-8 14-Mar-11 37°56'35" N 122°25'07" W 16.39 0.005 0.000 0.006 0.000 ND ND

T-9 14-Mar-11 37°57'21" N 122°26'25" W 14.21 0.002 0.000 0.004 0.000 ND ND

T-10 14-Mar-11 37°57'24" N 122°26'17" W 12.41 0.009 0.000 0.003 0.000 ND 0.007 0.000

T-11 14-Mar-11 38°01'21" N 122°23'70" W 11.92 0.006 0.001 0.002 0.000 ND 0.004 0.001

T-12 14-Mar-11 38°03'13" N 122°19'51" W 8.57 0.003 0.000 0.007 0.000 ND ND

T-13 15-Mar-11 38°08'95" N 121°41'31" W ND 0.002 0.000 0.004 0.000 ND ND

T-14 15-Mar-11 38°05'05" N 121°40'99" W ND 0.014 0.000 0.003 0.000 ND 0.010 0.000

T-15 15-Mar-11 38°03'93" N 121°51'35" W ND 0.003 0.000 0.003 0.000 ND ND

T-16 15-Mar-11 38°03'33" N 121°56'66" W ND 0.003 0.000 0.003 0.000 ND 0.000 0.000

T-17 15-Mar-11 38°03'72" N 122°01'54" W ND 0.008 0.000 ND ND 0.008 0.000

T-18 15-Mar-11 38°04'65" N 122°03'00" W ND 0.005 0.000 ND ND 0.005 0.000

T-19 15-Mar-11 38°03'57" N 122°12'48" W 7.24 0.010 0.000 0.008 0.000 ND 0.002 0.001

T-20 15-Mar-11 38°03'80" N 122°14'17" W 7.46 0.007 0.000 0.005 0.000 ND 0.001 0.000

Freeport 18-Mar-11 38°38'34" N 121°51'93" W NA 0.024 0.000 0.004 0.000 ND 0.020 0.000

Vernalis 18-Mar-11 37°65'64" N 121°24'05" W NA 0.014 0.000 0.002 0.000 ND 0.012 0.000 1

Total particulate selenium and speciated values are measured independently, and because of analytical variability, the sum of the speciated values may not 

exactly equal the total particulate selenium values.
North San Francisco Bay Selenium Characterization Study – Draft Final Report

A-26 Prepared by Tetra Tech, Inc. on behalf of WSPA

Table B-8b

2012 Wet Weather Particulate Analyses: Transect

Station #

Sample

Date Latitude Longitude

Lab

Salinity (psu)

Chlorophyll Selenium

TSM

(mg/L)

Chl a 

(μg/L)

Phaeo a

(μg/L)

Total Se

(μg/L) SD

Field Blank 10-Apr-12 – – – 0.23 ND 0.00 0.00 1.02

T-1 10-Apr-12 37°49.114 N 122°28.690 W 27.89 4.00 2.37 0.01 0.01 18.12

T-2 10-Apr-12 37°50.134 N 122°26.496 W 27.43 3.71 3.24 0.01 0.01 20.35

T-3 10-Apr-12 37°50.977 N 122°24.922 W 25.66 2.86 3.55 0.02 0.00 38.89

T-4 10-Apr-12 37°51.321 N 122°24.695 W 23.51 2.68 1.99 0.01 0.01 31.17

T-5 10-Apr-12 37°53.228 N 122°25.339 W 22.09 1.99 1.96 0.01 0.00 28.76

T-6 10-Apr-12 37°54.702 N 122°26.011 W 20.24 2.88 0.80 0.02 0.01 38.25

T-7 10-Apr-12 37°56.713 N 122°26.686 W 18.66 2.62 3.32 0.01 0.01 34.41

T-8 11-Apr-12 38°02.759 N 121°53.903 W ND 2.29 3.52 0.02 0.01 46.84

T-9 11-Apr-12 38°03.142 N 121°56.400 W ND 1.32 2.35 0.02 0.00 50.23

T-10 11-Apr-12 38°03.608 N 121°58.884 W ND 1.44 2.84 0.02 0.00 57.87

T-11 11-Apr-12 38°03.737 N 122°01.406 W ND 1.61 3.06 0.02 0.01 58.41

T-12 12-Apr-12 37°58.528 N 122°25.868 W 21.92 1.76 3.31 0.01 0.01 35.27

T-13 12-Apr-12 38°00.655 N 122.24.239 W 22.00 2.35 1.80 0.01 0.01 24.52

T-14 12-Apr-12 38°02.156 N 122°21.676 W 12.31 2.35 2.80 0.01 0.00 29.76

T-15 12-Apr-12 38°03.255 N 122°18.834 W 13.70 5.56 2.27 0.02 0.01 49.46

T-16 12-Apr-12 38°03.674 N 122°15.692 W 12.08 2.48 1.54 0.01 0.01 37.69

T-17 12-Apr-12 38°03.630 N 122°12.545 W 9.04 1.55 0.36 0.01 0.01 32.23

T-18 12-Apr-12 38°02.202 N 122°10.146 W 7.60 2.26 2.16 0.02 0.01 46.77

T-19 12-Apr-12 38°02.743 N 122°06.188 W 3.60 2.70 5.97 0.03 0.02 110.04

T-20 (USGS 757) 11-Apr-12 38°08.938 N 121°41.367 W ND 2.06 ND 0.01 0.00 16.59

T-21 (Rio Vista) 11-Apr-12 38°05.069 N 121°40.972 W ND 1.46 2.59 0.01 0.00 15.80

Freeport 16-Apr-12 38°22.993 N 121°31.144 W NC 3.41 2.45 0.02 0.00 42.06

Vernalis 16-Apr-12 37°39.430 N 121°14.429 W NC 10.48 5.12 0.03 0.00 31.25

NOTES: NA - Not Analyzed; ND - Non-detectable (Salinity, < 2 g/l; Se, < 0.0016 μg/l); Each station represents a single sample, the standard deviation (SD) was computed based on 

triplicate instrumental analyses on individual field samples. TSM refers to total suspended material, and includes mineral, organic, and living particulates in the water column. T-1 

represents Golden Gate. 
North San Francisco Bay Selenium Characterization Study – Draft Final Report

Prepared by Tetra Tech, Inc. on behalf of WSPA. B-27

Table B-8b (continued)

2012 Wet Weather Particulate Analyses: Transect

Station #

Sample

Date Latitude Longitude

Lab

Salinity

Total Se1

(μg/L) SD

Se IV +VI

(μg/L) SD

Se 0

(μg/L) SD

Organic Se

(μg/L) SD

Field Blank 10-Apr-12 – – – 0.00 0.00 ND 0.00 ND 0.0015 0.00

T-1 10-Apr-12 37°49.114 N 122°28.690 W 27.89 0.01 0.01 0.002 0.00 ND 0.0065 0.01

T-2 10-Apr-12 37°50.134 N 122°26.496 W 27.43 0.01 0.01 0.003 0.00 0.0022 0.00 0.0036 0.01

T-3 10-Apr-12 37°50.977 N 122°24.922 W 25.66 0.02 0.00 0.002 0.00 ND 0.0140 0.00

T-4 10-Apr-12 37°51.321 N 122°24.695 W 23.51 0.01 0.01 0.002 0.00 ND 0.0097 0.01

T-5 10-Apr-12 37°53.228 N 122°25.339 W 22.09 0.01 0.00 0.002 0.00 ND 0.011 0.00

T-6 10-Apr-12 37°54.702 N 122°26.011 W 20.24 0.02 0.01 0.002 0.00 ND 0.0130 0.01

T-7 10-Apr-12 37°56.713 N 122°26.686 W 18.66 0.01 0.01 0.006 0.00 ND 0.0084 0.01

T-8 11-Apr-12 38°02.759 N 121°53.903 W ND 0.02 0.01 0.004 0.00 ND 0.0178 0.01

T-9 11-Apr-12 38°03.142 N 121°56.400 W ND 0.02 0.00 0.005 0.00 ND 0.0171 0.01

T-10 11-Apr-12 38°03.608 N 121°58.884 W ND 0.02 0.00 0.005 0.00 ND 0.0154 0.00

T-11 11-Apr-12 38°03.737 N 122°01.406 W ND 0.02 0.01 0.004 0.00 ND 0.0165 0.01

T-12 12-Apr-12 37°58.528 N 122°25.868 W 21.92 0.01 0.01 0.003 0.00 ND 0.0990 0.01

T-13 12-Apr-12 38°00.655 N 122.24.239 W 22.00 0.01 0.01 0.004 0.00 ND 0.0070 0.01

T-14 12-Apr-12 38°02.156 N 122°21.676 W 12.31 0.01 0.00 0.004 0.00 ND 0.0074 0.00

T-15 12-Apr-12 38°03.255 N 122°18.834 W 13.70 0.02 0.01 0.003 0.00 ND 0.0144 0.01

T-16 12-Apr-12 38°03.674 N 122°15.692 W 12.08 0.01 0.01 0.004 0.00 ND 0.0065 0.01

T-17 12-Apr-12 38°03.630 N 122°12.545 W 9.04 0.01 0.01 0.004 0.00 ND 0.0088 0.01

T-18 12-Apr-12 38°02.202 N 122°10.146 W 7.60 0.02 0.01 0.002 0.00 ND 0.0145 0.01

T-19 12-Apr-12 38°02.743 N 122°06.188 W 3.60 0.03 0.02 0.007 0.00 ND 0.0244 0.02

T-20 (USGS 757) 11-Apr-12 38°08.938 N 121°41.367 W ND 0.01 0.00 0.003 0.00 ND 0.0069 0.01

T-21 (Rio Vista) 11-Apr-12 38°05.069 N 121°40.972 W ND 0.01 0.00 0.003 0.00 ND 0.0059 0.00

Freeport 16-Apr-12 38°22.993 N 121°31.144 W NC 0.02 0.00 0.003 0.00 ND 0.0167 0.01

Vernalis 16-Apr-12 37°39.430 N 121°14.429 W NC 0.03 0.00 0.009 0.01 0.0028 0.00 0.0201 0.01 1

Total particulate selenium and speciated values are measured independently, and because of analytical variability, the sum of the speciated values may not 

exactly equal the total particulate selenium values.
North San Francisco Bay Selenium Characterization Study – Draft Final Report

A-28 Prepared by Tetra Tech, Inc. on behalf of WSPA

Table B-9a

2011 Wet Weather Dissolved and Particulate Analyses: Locations Near the Five Refinery Outfalls

Station #

Sample

Date Latitude Longitude

Salinity

(psu)

Selenium

Dissolved

Selenium

Particulate

TSM 

(mg/L)

Field 

Salinity

Laboratory 

Salinity

Total Se 

(μg/L) SD

Total Se 

(μg/L) SD

CHEV-01 3/16/2011 37°58'11" N 122°25'41" W 15.16 22.34 0.11 0.000 0.017 0.0004 26.2

CHEV-02 3/16/2011 37°58'11" N 122°25'41" W 15.16 21.84 0.09 0.005 0.001 0.0000 30.2

CHEV-03 3/16/2011 37°58'11" N 122°25'41" W 15.16 25.13 0.08 0.002 ND 22.2

Shell-01 3/16/2011 38°01'56" N 122°07'49" W 5.86 6.08 0.13 0.002 0.019 0.0016 6.5

Shell-02 3/16/2011 38°01'56" N 122°07'49" W 5.89 5.84 0.81 0.017 0.024 0.0003 20.6

Shell-03 3/16/2011 38°01'56" N 122°07'48" W 5.87 4.90 0.39 0.010 0.025 0.0005 18.2

TES-01 3/22/2011 38°02'57" N 122°05'28" W 0.08 NA 0.19 0.003 0.023 0.0015 55.3

TES-02 3/22/2011 38°02'57" N 122°05'27" W 0.08 ND 0.10 0.000 0.012 0.0005 27.6

TES-03 3/22/2011 38°02'57" N 122°05'26" W 0.08 ND 0.10 0.002 0.010 0.0005 26.7

P66-01 3/17/2011 38°03'21" N 122°15'41" W 8.09 15.57 0.12 0.004 0.008 0.0004 49.7

P66-02 3/17/2011 38°03'21" N 122°15'41" W 8.09 16.03 0.35 0.000 0.010 0.0003 26.9

P66-03 3/17/2011 38°03'21" N 122°15'40" W 8.09 13.04 0.13 0.001 0.011 0.0008 35.8

VAL-01 3/16/2011 38°03'18" N 122°07'12" W 4.67 6.70 0.12 0.001 0.007 0.0009 27.9

VAL-02 3/16/2011 38°03'19" N 122°07'11" W 4.7 7.64 0.11 0.004 0.005 0.0005 26.2

VAL-03 3/16/2011 38°03'19" N 122°07'11" W 4.7 13.80 0.11 0.004 0.003 0.0000 28.8
North San Francisco Bay Selenium Characterization Study – Draft Final Report

Prepared by Tetra Tech, Inc. on behalf of WSPA. B-29

Table B-9a (continued)

2011 Wet Weather Dissolved and Particulate Analyses: Locations near the Five Refinery Outfalls

Station # Sample Date Latitude Longitude

Selenium Dissolved Selenium Particulate

Se IV

(ug/L) SD

Se VI

(ug/L) SD

Organic 

Se 

(Se-II)

(ug/L) SD

Se IV 

+VI

(μg/L) SD

Se 0

(μg/L) SD

Organic 

Se

(Se-II)

(μg/L) SD

CHEV-01 3/16/2011 37°58'11" N 122°25'41" W 0.019 0.000 0.056 0.001 0.030 0.001 0.004 0.000 ND 0.013 0.000

CHEV-02 3/16/2011 37°58'11" N 122°25'41" W 0.014 0.000 0.053 0.003 0.021 0.005 0.002 0.000 ND ND 0.000

CHEV-03 3/16/2011 37°58'11" N 122°25'41" W 0.022 0.001 0.046 0.002 0.014 0.003 ND 0.000 ND ND 0.000

Shell-01 3/16/2011 38°01'56" N 122°07'49" W 0.018 0.000 0.075 0.001 0.036 0.002 0.005 0.000 ND 0.014 0.002

Shell-02 3/16/2011 38°01'56" N 122°07'49" W 0.121 0.001 0.556 0.008 0.134 0.019 0.005 0.000 ND 0.018 0.001

Shell-03 3/16/2011 38°01'56" N 122°07'48" W 0.069 0.001 0.228 0.001 0.093 0.010 0.005 0.000 ND 0.020 0.001

TES-01 3/22/2011 38°02'57" N 122°05'28" W 0.033 0.000 0.117 0.008 0.041 0.008 0.006 0.000 ND 0.017 0.002

TES-02 3/22/2011 38°02'57" N 122°05'27" W 0.011 0.000 0.076 0.001 0.014 0.001 0.007 0.000 ND 0.005 0.001

TES-03 3/22/2011 38°02'57" N 122°05'26" W 0.005 0.000 0.071 0.002 0.020 0.003 0.005 0.000 ND 0.005 0.001

P66-01 3/17/2011 38°03'21" N 122°15'41" W 0.015 0.000 0.084 0.001 0.021 0.004 0.003 0.000 ND 0.005 0.000

P66-02 3/17/2011 38°03'21" N 122°15'41" W 0.008 0.001 0.095 0.008 0.246 0.008 0.004 0.000 ND 0.005 0.000

P66-03 3/17/2011 38°03'21" N 122°15'40" W 0.014 0.001 0.093 0.006 0.022 0.006 0.003 0.000 ND 0.008 0.001

VAL-01 3/16/2011 38°03'18" N 122°07'12" W 0.018 0.001 0.063 0.002 0.042 0.002 0.005 0.000 ND 0.002 0.001

VAL-02 3/16/2011 38°03'19" N 122°07'11" W 0.018 0.000 0.070 0.004 0.020 0.005 0.003 0.000 ND 0.002 0.001

VAL-03 3/16/2011 38°03'19" N 122°07'11" W 0.020 0.002 0.066 0.002 0.020 0.004 0.003 0.000 ND 0.000 0.000
North San Francisco Bay Selenium Characterization Study – Draft Final Report

A-30 Prepared by Tetra Tech, Inc. on behalf of WSPA

Table B-9b

2012 Wet Weather Dissolved and Particulate Analyses: Locations Near the Five Refinery Outfalls

Station #

Sample

Date Latitude Longitude

Salinity

(psu)

Selenium

Dissolved

Selenium

Particulate

TSM 

(mg/L)

Field 

Salinity

Laboratory 

Salinity

Total Se 

(μg/L) SD

Total Se 

(μg/L) SD

Chev-02 10-Apr-12 37°58.177 N 122°25.677 W - 22.52 0.100 0.03 0.025 0.01 79.5

Chev-01 10-Apr-12 37°58.182 N 122°25.682 W - 22.54 0.098 0.01 0.025 0.01 75.1

Chev-03 10-Apr-12 37°58.188 N 122°25.671 W - 22.51 0.100 0.03 0.021 0.00 62.7

Shell-01 12-Apr-12 38°01.934 N 122°07.818 W 6.60 7.05 0.151 0.06 0.035 0.00 135.7

Shell-02 12-Apr-12 38°01.937 N 122°07.812 W 6.60 7.25 0.135 0.06 0.028 0.00 85.6

Shell-03 12-Apr-12 38°01.940 N 122°07.806 W 6.60 6.81 0.145 0.02 0.024 0.01 75.2

Tes-01 25-Apr-12 38o 02.950 N 122o05.435 W 0.90 NC 0.086 0.01 0.023 0.00 62.0

Tes-02 25-Apr-12 38o 02.948 N 122o05.448 W 0.90 NC 0.081 0.02 0.026 0.00 65.6

Tes-03 25-Apr-12 38o 02.947 N 122o05.463 W 1.00 NC 0.093 0.06 0.035 0.00 111.1

P66-01 13-Apr-12 38°03.348 N 122°15.686 W 15.20 15.30 0.123 0.04 0.017 0.01 46.6

P66-02 13-Apr-12 38°03.349 N 122°15.679 W 14.70 14.80 0.374 0.01 0.009 0.00 44.3

P66-03 13-Apr-12 38°03.350 N 122°15.672 W 16.60 16.63 0.174 0.01 0.020 0.00 54.6

Val-01 11-Apr-12 38°03.306 N 122°07.195 W - 11.76 0.122 0.04 0.027 0.01 79.8

Val-02 11-Apr-12 38°03.312 N 122°07.191 W - 11.50 0.110 0.01 0.018 0.00 44.0

Val-03 11-Apr-12 38°03.316 N 122°07.188 W - 10.73 0.116 0.03 0.015 0.01 43.8
North San Francisco Bay Selenium Characterization Study – Draft Final Report

Prepared by Tetra Tech, Inc. on behalf of WSPA. B-31

Table B-9b (continued)

2012 Wet Weather Dissolved and Particulate Analyses: Locations Near the Five Refinery Outfalls

Station #

Sample

Date Latitude Longitude

Selenium Dissolved Selenium Particulate

Se IV

(ug/L) SD

Se VI

(ug/L) SD

Organic 

Se 

(Se-II)

(ug/L) SD

Se IV 

+VI

(μg/L) SD

Se 0

(μg/L) SD

Organic 

Se

(Se-II)

(μg/L) SD

Chev-02 10-Apr-12 37°58.177 N 122°25.677 W 0.025 0.01 0.055 0.01 0.019 0.04 0.004 0.00 ND 0.02 0.01

Chev-01 10-Apr-12 37°58.182 N 122°25.682 W 0.025 0.01 0.057 0.02 0.016 0.03 0.003 0.00 ND 0.02 0.01

Chev-03 10-Apr-12 37°58.188 N 122°25.671 W 0.024 0.02 0.058 0.03 0.018 0.04 0.003 0.00 ND 0.02 0.00

Shell-01 12-Apr-12 38°01.934 N 122°07.818 W 0.024 0.01 0.078 0.08 0.049 0.06 0.005 0.00 0.002 0.00 0.03 0.00

Shell-02 12-Apr-12 38°01.937 N 122°07.812 W 0.018 0.01 0.087 0.06 0.029 0.06 0.004 0.00 ND 0.02 0.00

Shell-03 12-Apr-12 38°01.940 N 122°07.806 W 0.020 0.02 0.086 0.03 0.039 0.03 0.005 0.00 ND 0.02 0.01

Tes-01 25-Apr-12 38o 02.950 N 122o05.435 W 0.012 0.01 0.054 0.02 0.020 0.02 0.004 0.00 ND 0.02 0.00

Tes-02 25-Apr-12 38o 02.948 N 122o05.448 W 0.010 0.01 0.058 0.05 0.014 0.03 0.007 0.00 ND 0.02 0.00

Tes-03 25-Apr-12 38o 02.947 N 122o05.463 W 0.013 0.02 0.054 0.02 0.026 0.07 0.006 0.00 0.002 0.00 0.03 0.01

P66-01 13-Apr-12 38°03.348 N 122°15.686 W 0.028 0.00 0.063 0.031 0.04 0.003 0.00 ND 0.01 0.01

P66-02 13-Apr-12 38°03.349 N 122°15.679 W 0.019 0.00 0.271 0.16 0.084 0.02 0.003 0.00 ND 0.01 0.00

P66-03 13-Apr-12 38°03.350 N 122°15.672 W 0.013 0.01 0.113 0.02 0.048 0.02 0.004 0.00 ND 0.02 0.00

Val-01 11-Apr-12 38°03.306 N 122°07.195 W 0.024 0.00 0.072 0.027 0.04 0.002 0.00 ND 0.02 0.01

Val-02 11-Apr-12 38°03.312 N 122°07.191 W 0.021 0.01 0.068 0.02 0.021 0.02 0.004 0.00 ND 0.01 0.00

Val-03 11-Apr-12 38°03.316 N 122°07.188 W 0.021 0.02 0.069 0.03 0.026 0.04 0.003 0.00 ND 0.01 0.01
North San Francisco Bay Selenium Characterization Study – Draft Final Report

B-32 Prepared by Tetra Tech, Inc. on behalf of WSPA

Table B-10a

2011 Wet Weather Refinery Receiving Water Station Tidal Stages and Depths

Refinery Station ID Tide Stage Current

Station

Depth (ft)

Sample

Depth (ft)

Tesoro TES-01 Ebb Down 58 40

Tesoro TES-02 Ebb Outfall 73 40

Tesoro TES-031 Ebb Down 72 46

Shell SHELL-01 Ebb Down 32 18

Shell SHELL-021 Ebb Outfall 39 20

Shell SHELL-03 Ebb Up 37 19

Phillips 66 P66-01 Ebb Down 48 30

Phillips 66 P66-021 Ebb Outfall 48 30

Phillips 66 P66-03 Ebb Up 46 30

Chevron CHEV-01 Slack Slack 51 30

Chevron CHEV-021 Slack Outfall 50 30

Chevron CHEV-03 Slack Slack 50 30

Valero VAL-012 Flood Up 28 18

Valero VAL-02 Flood Down 29 20

Valero VAL-03 Flood Down 28 20

NOTES: 

1

Diffuser center-line station 2

Station is approximately 20m NW of diffuser centerline (see Section 2, above, for details)

Table B-10b

2012 Wet Weather Refinery Receiving Water Station Tidal Stages and Depths

Refinery Station ID Tide Stage Current

Station

Depth (ft)

Sample

Depth (ft)

Tesoro TES-01 Ebb Up 60 40

Tesoro TES-021 Ebb Outfall 63 40

Tesoro TES-03 Ebb Down 66 40

Shell SHELL-01 Ebb Up 52 31

Shell SHELL-021 Ebb Outfall 53 31

Shell SHELL-03 Ebb Down 50 30

Phillips 66 P66-01 Ebb Up 45 30

Phillips 66 P66-021 Ebb Outfall 48 32

Phillips 66 P66-03 Ebb Down 47 33

Chevron CHEV-01 Flood Down 41.6 25

Chevron CHEV-021 Flood Outfall 45 25

Chevron CHEV-03 Flood Up 42.3 25

Valero VAL-01 Ebb Up 25.8 15

Valero VAL-021 Ebb Outfall 25.5 15

Valero VAL-03 Ebb Down 27.5 15

NOTES: 

1

Diffuser center-line station
North San Francisco Bay Selenium Characterization Study – Draft Final Report

Prepared by Tetra Tech, Inc. on behalf of WSPA B-33

Table B-11

Comparison of Estuary Transect Mean and Standard Deviation for

Species Sampled in March 2011, April 2012 and April 1999

Unit

March 2011 April 2012 April 1999

Mean SD Mean SD Mean SD

Nitrate + Nitrite μmol/L 23.74 4.07 26.22 24.7 21.98 2.36

Phosphate μmol/L 1.68 0.14 1.52 0.60 1.42 0.24

Silicate μmol/L 164.2 66.96 151.3 90.4 179.8 70.54

Chlorophyll a μg/L 9.42 7.31 2.47 1.00 2.93 0.89

TSM (142mm) mg/L 17.8 8.52 58.1 51.0 31.2 20.53

Se IV μg/L 0.017 0.003 0.02 0.01 0.015 0.002

SeVI μg/L 0.063 0.011 0.07 0.06 0.055 0.020

Se II μg/L 0.026 0.012 0.03 0.01 0.045 0.029

Total Se (dissolved) μg/L 0.103 0.012 0.12 0.08 0.116 0.024

Part. Se IV + VI μg/L 0.004 0.002 0.004 0.002 0.005 0.001

Part. Se 0 μg/L ND 0.003 0.000 0.003 0.002

Part. Se II μg/L 0.005 0.003 0.02 0.02 0.008 0.005

Total Part. Se μg/L 0.006 0.003 0.02 0.02 0.015 0.006

Total part. Se μg/g 0.64 0.05 0.47 0.24 0.64 0.35
North San Francisco Bay Selenium Characterization Study – Draft Final Report

B-34 Prepared by Tetra Tech, Inc. on behalf of WSPA

Table B-12

Dissolved and Particulate Selenium Concentrations in Refinery Effluents

Sample 

Date

Se IV

(μg/L)

Se VI

(μg/L)

Total 

dis. Se

(μg/L)

Organic 

Se

(μg/L)

Part. 

SeIV+VI

(μg/L)

Part. 

Se0

(μg/L)

Part. 

Organic 

Se

(μg/L)

Total 

part. 

Se1

(μg/L)

Total 

Se

(dis. + 

part.) 

(μg/L)

Total Se 

Median

Concentration

Reported in 

TM-2 

(Tetra Tech, 

2008)

(1999–2007)

% change 

in total Se

(2010 from 

1999–2007)

TSM 

(mg/L)

23-Sep-10 2.5 18.1 24.0 3.4 0.054 0.47 ND 0.16 24.16 27 -10.5 0.82

30-Sep-10 16.6 2.7 22.2 2.1 0.040 0.06 0.26 0.37 22.57 11.2 101.8 11.43

30-Sep-10 0.2 19.1 26.2 6.9 0.005 0.03 0.01 0.04 26.24 14 87.5 1.53

6-Oct-10 0.0 1.2 7.4 6.1 0.031 0.27 0.15 0.45 7.85 11 -28.7 10.45

23-Sep-10 0.5 12.9 21.2 7.8 0.05 0.09 ND 0.07 21.27 26.1 -18.8 0.94

21-Oct-10 2.9 12.3 18.7 3.5 0.061 No Filter No Filter 0.18 18.88 27 -30.2 1.35

21-Oct-10 11.0 2.8 13.6 ND 0.008 0.14 0.10 0.25 13.85 11.2 23.4 12.23

22-Oct-10 0.3 14.6 15.0 ND 0.003 0.02 0.00 0.03 15.03 14 7.0 2.87

20-Oct-10 0.2 2.9 5.9 2.8 0.007 0.16 0.17 0.34 6.24 11 -43.7 8.45

22-Oct-10 0.4 2.5 12.3 9.4 0.03 0.11 ND 0.13 12.43 26.1 -52.8 2.1

19-Nov-10 5.0 12.8 19.8 1.9 0.052 0.25 0.03 0.33 20.13 27 -25.5 2.1

18-Nov-10 3.7 4.5 9.3 1.0 0.005 0.09 0.05 0.14 9.44 11.2 -15.7 4.9

19-Nov-10 ND 8.7 10.1 1.3 ND 0.02 0.03 0.05 10.15 14 -27.6 3.25

18-Nov-10 0.1 3.8 6.3 2.4 0.025 0.13 0.03 0.19 6.49 11 -41.3 5.85

19-Nov-10 0.4 6.8 10.9 3.7 0.03 0.11 0.02 0.15 11.05 26.1 -58.2 2.6

17-Dec-10 3.3 8.2 12.6 1.1 0.009 0.05 ND 0.03 12.63 27 -53.1 1.45

16-Dec-10 15.0 1.3 15.1 ND 0.002 0.12 0.31 0.43 15.53 11.2 38.5 10.55

17-Dec-10 0.2 13.3 13.3 ND 0.005 0.03 0.05 0.09 13.39 14 -4.3 4.20

16-Dec-10 0.1 4.1 7.6 3.5 0.010 0.30 0.08 0.39 7.99 11 -27.2 6.25

17-Dec-10 0.5 6.6 12.1 4.9 0.04 0.11 ND 0.13 12.23 26.1 -53.8 2.3

ND = not detected; Detection Limits: 0.0016 μg/l for dissolved species, and 0.0004 μg/l for particulate species (see Chapter 3).

No Filter: for one effluent sample, the filter was compromised during sample processing in the laboratory. 1

Total particulate selenium and speciated values are measured independently, and because of analytical variability, the sum of the speciated values may not exactly equal the total 

particulate selenium values.
North San Francisco Bay Selenium Characterization Study – Draft Final Report

Prepared by Tetra Tech, Inc. on behalf of WSPA B-35

Table B-12 (continued)

Dissolved and Particulate Selenium Concentrations in Refinery Effluents

Sample 

Date

Se IV

(μg/L)

Se VI

(μg/L)

Total 

dis. Se

(μg/L)

Organic 

Se

(μg/L)

Part. 

SeIV+VI

(μg/L)

Part. 

Se0

(μg/L)

Part. 

Organic 

Se

(μg/L)

Total 

part. Se1

(μg/L)

Total 

Se

(dis. + 

part.) 

(μg/L)

Total Se 

Median

Concentration

Reported in 

TM-2 

(Tetra Tech, 

2008)

(1999–2007)

% change in 

total Se

(2010 from 

1999–2007)

TSM 

(mg/L)

21-Jan-11 3.4 14.3 18.5 ND 0.036 0.234 ND 0.142 18.6 27 -31.1 1.35

NA NA 0.0 26.1 -100.0

20-Jan-11 7.9 2.1 10.5 ND 0.007 0.181 0.009 0.197 10.7 11.2 -4.4 6.75

21-Jan-11 0.2 18.4 18.9 ND 0.011 0.029 0.056 0.097 19.0 14 35.5 6.05

20-Jan-11 0.3 4.2 6.9 2.4 0.052 0.483 ND 0.239 7.2 11 -34.8 7.85

17-Feb-11 2.9 11.1 21.8 7.9 0.017 0.425 0.237 22.1 27 -18.3 2.40

NA NA 0.0 26.1 -100.0

17-Feb-11 6.8 2.1 8.0 ND 0.009 0.072 ND 0.067 8.0 11.2 -28.2 3.40

17-Feb-11 0.3 10.4 17.3 6.5 0.006 0.024 ND 0.025 17.3 14 23.6 3.65

17-Feb-11 0.1 3.1 6.4 3.2 0.021 0.203 0.175 0.399 6.8 11 -38.0 8.30

30-Mar-11 5.7 15.3 32.4 11.4 0.085 1.229 0.253 32.6 27 20.8 0.85

25-Mar-11 1.0 7.2 22.8 14.6 0.072 5.707 0.117 22.9 26.1 -12.4 5.55

24-Mar-11 2.7 4.2 8.4 1.4 0.016 0.096 0.111 0.223 8.6 11.2 -23.3 12.80

25-Mar-11 0.3 11.0 13.7 2.3 0.007 0.039 0.036 0.081 13.7 14 -1.9 4.45

24-Mar-11 0.2 2.6 5.2 2.3 0.021 0.175 0.081 5.3 11 -52.2 1.85

27-Apr-11 4.1 15.2 26.2 6.8 0.090 0.799 0.593 26.8 27 -0.8 3.95

21-Apr-11 17.4 5.4 32.1 9.3 0.025 0.561 ND 0.591 32.7 26.1 25.2 6.20

20-Apr-11 7.8 3.5 11.8 ND 0.010 0.098 0.034 0.143 12.0 11.2 7.0 14.38

20-Apr-11 0.0 11.0 19.2 8.1 0.006 0.029 0.034 0.070 19.2 14 37.4 5.68

20-Apr-11 0.1 2.4 4.3 1.9 0.024 0.334 0.090 4.4 11 -59.8 8.36

ND = not detected; Detection Limits: 0.0016 μg/l for dissolved species, and 0.0004 μg/l for particulate species (see Chapter 3).

No Filter: for one effluent sample, the filter was compromised during sample processing in the laboratory.

1

Total particulate selenium and speciated values are measured independently, and because of analytical variability, the sum of the speciated values may not exactly equal the total 

particulate selenium values.
North San Francisco Bay Selenium Characterization Study – Draft Final Report

B-36 Prepared by Tetra Tech, Inc. on behalf of WSPA

Table B-12 (continued)

Dissolved and Particulate Selenium Concentrations in Refinery Effluents

Sample 

Date

Se IV

(μg/L)

Se VI

(μg/L)

Total 

dis. Se

(μg/L)

Organic 

Se

(μg/L)

Part. 

SeIV+VI

(μg/L)

Part. 

Se0

(μg/L)

Part. 

Organic 

Se

(μg/L)

Total 

part. Se1

(μg/L)

Total 

Se

(dis. + 

part.) 

(μg/L)

Total Se 

Median

Concentration

Reported in 

TM-2 

(Tetra Tech, 

2008)

(1999–2007)

% change in 

total Se

(2010 from 

1999–2007)

TSM 

(mg/L)

18-May-11 5.1 16.6 30.2 8.5 0.132 0.698 0.180 1.009 31.3 27 15.7 7.75

20-May-11 6.9 4.0 16.2 5.2 0.018 0.266 0.221 16.4 26.1 -37.2 3.10

19-May-11 9.4 3.8 13.4 ND 0.012 0.211 0.106 13.5 11.2 20.8 6.55

20-May-11 0.0 12.7 19.6 6.9 0.005 0.014 0.024 0.043 19.6 14 40.1 3.75

20-May-11 0.0 2.0 6.0 4.0 0.057 0.614 0.245 0.916 6.9 11 -36.8 14.60

17-Jun-11 9.6 14.3 30.6 6.6 0.034 0.570 0.547 31.1 27 15.2 7.46

17-Jun-11 0.8 17.5 20.5 2.2 0.044 0.498 0.066 0.608 21.1 26.1 -19.1 5.05

16-Jun-11 5.4 4.9 12.3 2.0 0.022 0.113 0.107 0.241 12.6 11.2 12.2 14.73

17-Jun-11 0.1 5.0 5.4 ND 0.005 0.018 ND 0.027 5.5 14 -60.9 10.35

23-Jun-11 0.0 2.4 4.9 2.5 0.011 0.136 0.167 0.314 5.2 11 -52.9 19.40

22-Jul-11 8.3 16.2 29.9 5.5 0.061 0.472 0.190 0.723 30.7 27 13.6 4.30

22-Jul-11 Sample broken during shipping 0.028 0.310 0.230 0.2 26.1 -99.1

21-Jul-11 7.7 5.7 14.1 ND 0.019 0.180 0.189 0.388 14.4 11.2 29.0 21.05

22-Jul-11 0.3 30.8 36.1 5.1 0.004 0.018 ND 0.038 36.1 14 158.0 2.90

21-Jul-11 0.2 4.0 9.4 5.3 0.004 0.120 0.095 0.219 9.7 11 -12.3 7.90

19-Aug-11 7.5 17.8 32.3 7.0

Samples lost during shipping

0.463 27 3.15

19-Aug-11 1.4 8.1 14.0 4.5 0.031 26.1 5.20

18-Aug-11 8.9 1.8 11.2 ND 0.283 11.2 14.85

25-Aug-11 0.1 17.5 22.2 4.7 0.044 14 4.50

18-Aug-11 0.2 6.4 10.1 3.5 0.399 11 11.85

ND = not detected; Detection Limits: 0.0016 μg/l for dissolved species, and 0.0004 μg/l for particulate species (see Chapter 3).

No Filter: for one effluent sample, the filter was compromised during sample processing in the laboratory.

1

Total particulate selenium and speciated values are measured independently, and because of analytical variability, the sum of the speciated values may not exactly equal the total 

particulate selenium values.
North San Francisco Bay Selenium Characterization Study – Draft Final Report

Prepared by Tetra Tech, Inc. on behalf of WSPA C-1

Appendix C

San Francisco Bay Selenium Sampling Logs

North San Francisco Bay Selenium Characterization Study – Draft Final Report

Prepared by Tetra Tech, Inc. on behalf of WSPA D-1

Appendix D

Chain of Custody Forms

North San Francisco Bay Selenium Characterization Study – Draft Final Report

Prepared by Tetra Tech, Inc. on behalf of WSPA E-1

Appendix E

Filtration Study

Filtration Study

This study was designed to address the issues associated with the March 2011 wet weather total 

suspended matter (TSM) results and included (1) equipment integrity checks, (2) sample 

processing procedural reviews, (3) filter integrity and (4) a multi-sample filtration and filter 

breakthrough bench-scale study. This memo reports the results of the bench-scale study.

New 142mm filters were shipped to Columbia Analytical services Laboratory (CAS-Lab) (Kelso, 

WA) during the week of June 13, 2011. The laboratory desiccated, tared and shipped the filters 

back to Tetra Tech.

On June 22, 2011, three (5-L) GoFlo samplers were filled from a single 20-L grab sample that 

was collected from the Suisun Marina (Suisun City, CA); thus creating triplicate samples. From 

each GoFlo, two TSM samples were processed and the filter collected; resulting in six 

theoretically identical samples. Additionally, from each GoFlo, a sample of the filtered water was 

re-processed through a new filter as a check against filtration breakthrough. All filters were 

processed according to the Cutter SOP and shipped back to CAS-Lab for TSM analysis.

The TSM results for each of the GoFlo samplers were expected to be very similar since they were 

all from the same grab sample. These expectations were met for GoFlo #1 and GoFlo #2 where 

the TSM range was 36 mg/l–40 mg/l. This was not, however, the case with the TSM results from 

GoFlo #3 (8.1 mg/l and 27.3 mg/l), which were neither similar to each other nor to those reported 

for GoFlo #’s 1 and 2. No filter breakthrough was reported for any of the GoFlo samples (Table 

E-1).

The unexpected low TSM results from GoFlo #3 prompted us to look at the calculations used by 

the laboratory to produce the final TSM values. This examination put into question the validity of 

the reported tare weights for the three filters used for GoFlo #3 since these are membrane filters 

with little inter-filter variability in weight. The mean tared weight for all filters (except those used 

on GoFlo #3) was 0.14 g (n=6). However, the mean tare weight for the GoFlo #3 filters was 0.18 

g (n=3). When the mean tared weight of 0.14 g is used as a proxy for the initial tared filter weight 

for the GoFlo #3 samples, we generate TSM concentrations that are similar to those reported for 

GoFlo #’s 1 and 2 (Table E-2). This indicated that the unexpected low TSM values were entirely 

caused by inaccurate initial tare weights.

Subsequent conversations with CAS-Lab indicate that they agree with our assessment that the 

filters were not completely desiccated or tared correctly at the lab; demonstrating the importance 

of reviewing the initial tare weight for each filter.

The resolution of these filtration anomalies prompted Tetra Tech to re-sample at the Vernalis 

(San Joaquin River) site on July 6, 2011. Duplicate samples were collected and processed at this 

site for the following parameters:
North San Francisco Bay Selenium Characterization Study – Draft Final Report

E-2 Prepared by Tetra Tech, Inc. on behalf of WSPA

• Dissolved Se

• Particulate Se

• Nutrients

• TSM

Existing flow conditions at the Vernalis site are similar, albeit slightly greater (9,140 cfs) than 

those observed during the March 2011 wet weather sampling (8,850 cfs) (USGS 2011). It should 

be noted that, while the flows are similar, they are the result of different mechanisms; rainfall 

(March 2011) and snowmelt (July 2011).

Table E-1

June 22, 2011 TSM Results

GoFlo Sample ID TSM (mg/l)

1a 40.6

1b 36.0

1c (breakthrough check) ND

2a 37.0

2b 36.9

2c (breakthrough check) ND

3a 8.1

3b 27.3

3c (breakthrough check) ND

Table E-2

June 22, 2011 TSM Results Using Proxy Tare Weight for GoFlo #3

GoFlo Sample ID TSM (mg/l)

1a 40.6

1b 36.0

1c (breakthrough check) ND

2a 37.0

2b 36.9

2c (breakthrough check) ND

3a 36.5

3b 37.8

3c (breakthrough check) ND
North San Francisco Bay Selenium Characterization Study – Draft Final Report

Prepared by Tetra Tech, Inc. on behalf of WSPA F-1

Appendix F

Tributary Study

Tributary Study

Six tributaries to the North San Francisco Bay were sampled during a wet weather event on 

March 14 – 15, 2012 (Figure F-1) and were processed for total and particulate selenium analyses, 

chlorophyll-a and particulate CNS. The specifics of the study are discussed in the following 

sections.

Sample Locations

Six sites were selected for sampling based upon a ranking of historic selenium loading into the 

San Francisco Bay. The specific sample location for each of the sites is presented in Figures F-2 

through F-7. A single sample was collected from each of four tributaries located on the north side 

of the Bay (Napa River at Napa, Novato Creek at Novato, Petaluma River at Petaluma and Suisun 

Creek at Fairfield) and from two tributaries on the south side of the Bay (Pinole Creek at Pinole 

and Walnut Creek at Concord).

Site Conditions

The survey was conducted during a strong wet weather event with rainfall totals ranging from 2 –

5 inches over the two day period. USGS flow data during the survey period were available at two 

of the northern sites (Napa River and Novato Creek), and on 14 March 2012 flows reported for 

Napa River and Novato Creek were approximately 5,200 cfs and 26 cfs, respectively. The 

increased runoff caused by the storm caused the water to be extremely turbid at all sites. 

The salinities at all sites were <2 g/L.

Sample Collection Procedures

Each sample was collected using a pre-cleaned sample bucket. Samples were collected midstream either by lowering the bucket from a bridge (on the upstream side) or wading into the 

water body at which time samples were collected upstream from the team member collecting the 

sample. Once onshore, basic water quality parameters (pH, dissolved oxygen, conductivity, 

salinity and turbidity) were measured and the sample was transferred into separate pre-cleaned 10 

liter cubitainers and stored on ice in a cooler.

Sample Processing

Each sample was transferred into cleaned Go-Flo samplers, pressurized with nitrogen gas and 

filtered through 142mm and 47mm (0.4μm) filters using the same protocol used for the transect 

and refinery receiving water samples. 

Aliquots from each sample were collected and processed for chlorophyll-a and particulate CNS 

using the protocols established for the transect sampling component of the project.
North San Francisco Bay Selenium Characterization Study – Draft Final Report

F-2 Prepared by Tetra Tech, Inc. on behalf of WSPA

The dissolved selenium samples were collected into pre-cleaned and labeled 1L glass bottles, 

acidified, wrapped in bubble-wrap and stored.

The TSM and particulate selenium filters were carefully folded, placed into separate labeled vials, 

frozen using dry-ice and stored in a freezer at -13 o

C.

Figure F-1

North San Francisco Bay Tributary Sample Locations (March 14–15, 2012)
North San Francisco Bay Selenium Characterization Study – Draft Final Report

Prepared by Tetra Tech, Inc. on behalf of WSPA F-3

Figure F-2

Napa River at Napa (March 14, 2012)
North San Francisco Bay Selenium Characterization Study – Draft Final Report

F-4 Prepared by Tetra Tech, Inc. on behalf of WSPA

Figure F-3

Novato Creek at Novato (March 14, 2012)
North San Francisco Bay Selenium Characterization Study – Draft Final Report

Prepared by Tetra Tech, Inc. on behalf of WSPA F-5

Figure F-4

Petaluma River at Petaluma (March 14, 2012)
North San Francisco Bay Selenium Characterization Study – Draft Final Report

F-6 Prepared by Tetra Tech, Inc. on behalf of WSPA

Figure F-5

Suisun Creek at Fairfield (March 15, 2012)
North San Francisco Bay Selenium Characterization Study – Draft Final Report

Prepared by Tetra Tech, Inc. on behalf of WSPA F-7

Figure F-6

Pinole Creek at Pinole (March 15, 2012)
North San Francisco Bay Selenium Characterization Study – Draft Final Report

F-8 Prepared by Tetra Tech, Inc. on behalf of WSPA

Figure F-7

Walnut Creek at Concord (March 15, 2012)
North San Francisco Bay Selenium Characterization Study – Draft Final Report

Prepared by Tetra Tech, Inc. on behalf of WSPA F-9

Filtration times were long due to the elevated levels of suspended matter and filtration was halted 

once each filter was completely occluded:

Napa and Petaluma River = 3 hours each

Novato Creek - >3 hours

Raines Creek, Pinole Creek and Walnut Creek – 2.5 hours each

Sample Parameters

All samples were processed and analyzed for dissolved selenium, total suspended matter, 

particulate selenium chlorophyll-a and particulate CNS. 

Sample Shipment

All samples were shipped to Greg Cutter’s lab along with the wet weather tributary and refinery 

receiving water samples that will be collected during the week of April 9, 2012.

Six tributaries to the North San Francisco Bay were sampled during a wet weather event on 

March 14 – 15, 2012 and were processed for total, particulate and speciation selenium analyses as 

well as TMS. The Tributary data summary tables are provided in Table F-1).

Dissolved Total Selenium

Total dissolved selenium concentrations from the six tributaries sampled during March 2012 

ranged an order of magnitude from a low of 0.077 μg/L at Suisun Creek to a high of 0.76 μg/L at 

Napa River, with the dissolved selenium concentrations in the remaining tributaries being less 

than 0.2 μg/L (Figure F-8).

Figure F-8

Wet Weather: Total Tributary Selenium Concentrations in the Dissolved Fraction 

0.000

0.100

0.200

0.300

0.400

0.500

0.600

0.700

0.800

Novato

Creek

Walnut

Creek

Suisun

Creek

Napa Pinole

Creek

Petaluma

River

Selenium (ug/L)

Tributary

Tributary Total Selenium: Dissolved 

Fraction
North San Francisco Bay Selenium Characterization Study – Draft Final Report

F-10 Prepared by Tetra Tech, Inc. on behalf of WSPA

Particulate Total Selenium

Total particulate selenium concentrations from the six tributaries sampled during March 2012 

ranged from a low of 0.022 μg/L at Petaluma River to a high of 0.100 μg/L at Walnut Creek, with 

the particulate selenium concentrations in the remaining tributaries being less than 0.2 μg/L 

(FigureF-9).

Total Suspended Material (TSM)

The concentrations of total suspended material (TSM) between the six tributaries varied by a 

factor of 4, with the lowest concentration of approximately 50 mg/L being observed at Novato

Creek and the highest concentration of approximately 200 mg/L being observed at Walnut Creek. 

The remaining tributary TSM concentrations were approximately 150 mg/L (Figure F-10).

There appears to be a general positive correlation between TSM levels and particulate selenium 

concentrations (Figure F-11).

Figure F-9

Wet Weather: Total Tributary Selenium Concentrations in the Particulate Fraction 

0.000

0.020

0.040

0.060

0.080

0.100

0.120

Walnut

Creek

Suisun

Creek

Napa Pinole

Creek

Petaluma

River

Novato

Creek

Selenium (ug/L)

Tributary

Tributary Total Selenium: Particulate 

Fraction
North San Francisco Bay Selenium Characterization Study – Draft Final Report

Prepared by Tetra Tech, Inc. on behalf of WSPA F-11

Table F-1

2012 Wet Weather Dissolved and Particulate Analyses: Tributaries

Station #

Sample

Date Latitude Longitude

Salinity (psu)

Selenium

Dissolved

Selenium 

Particulate

TSM 

(mg/L)

Field 

Salinity

Laboratory 

Salinity

Total Se 

(μg/L) SD

Total Se 

(μg/L) SD

Walnut Creek 15-Mar-12 37o 58.168 N 122o 03.195 W <1.0 - 0.48 0.06 0.10 0.00 207.28

Suisun Creek 15-Mar-12 38o 13.483 N 122o 06.474 W <1.0 - 0.17 0.06 0.08 0.01 142.02

Napa 14-Mar-12 38o 19.494 N 122o 17.102 W <1.0 - 0.08 0.02 0.06 0.00 167.06

Pinole Creek 15-Mar-12 37o 58.272 N 122o 14.561 W <1.0 - 0.76 0.24 0.08 0.03 144.97

Petaluma River 14-Mar-12 38o 15.683 N 122o 39.695 W <1.0 - 0.14 0.03 0.02 0.01 138.42

Novato Creek 14-Mar-12 38o 06.130 N 122o 34.310 W <1.0 - 0.08 0.05 0.02 0.02 48.81

Table F-1 (continued)

2012 Wet Weather Dissolved and Particulate Analyses: Tributaries

Station #

Sample

Date Latitude Longitude

Selenium Dissolved Selenium Particulate

Se IV

(ug/L) SD

Se VI

(ug/L) SD

Organic 

Se

(ug/L) SD

Se IV 

+VI

(μg/L) SD

Se 0

(μg/L) SD

Organic 

Se

(μg/L) SD

Walnut Creek 15-Mar-12 37o 58.168 N 122o 03.195 W 0.02 0.01 0.28 0.14 0.18 0.15 0.010 0.01 0.003 0.00 0.088 0.01

Suisun Creek 15-Mar-12 38o 13.483 N 122o 06.474 W 0.01 0.00 0.03 0.05 0.14 0.08 0.004 0.00 ND 0.076 0.01

Napa 14-Mar-12 38o 19.494 N 122o 17.102 W 0.01 0.01 0.03 0.04 0.04 0.05 0.007 0.01 ND 0.054 0.01

Pinole Creek 15-Mar-12 37o 58.272 N 122o 14.561 W 0.01 0.01 0.70 0.37 ND ND ND 0.081 0.03

Petaluma River 14-Mar-12 38o 15.683 N 122o 39.695 W ND 0.05 0.04 0.10 0.04 0.007 0.00 0.003 0.00 0.013 0.01

Novato Creek 14-Mar-12 38o 06.130 N 122o 34.310 W 0.004 0.00 0.05 0.00 0.03 0.05 0.005 0.00 ND 0.020 0.02
North San Francisco Bay Selenium Characterization Study – Draft Final Report

F-12 Prepared by Tetra Tech, Inc. on behalf of WSPA

Figure F-10

Wet Weather: Total Suspended Material (TSM) in Six Tributaries Sampled in March 2012

Figure F-11

Wet Weather: Correlation between TSM and Particulate Selenium Concentrations in the Six 

Tributaries.

0

50

100

150

200

250

Walnut

Creek

Suisun

Creek

Napa Pinole

Creek

Petaluma

River

Novato

Creek

TSM (mg/L)

Tributary

Tributary TSM: Particulate Fraction

0.000

0.020

0.040

0.060

0.080

0.100

0.120

0 50 100 150 200 250

Selenium (ug/L)

TSM (mg/L)

Tributary Selenium Concentrations 

vs. TSM