ATTACHMENT B: FIELD SAMPLING PHOTOGRPAHSTAKEN DURING ROAD SURFACE SAMPLING ACTIVITIES IN BAY POINT, PITTSBURG, ANTIOCH, OAKLEY AND BRENTWOOD, CALIFORNIA – SEPTEMBER 11-26, 2002

Provided in Electronic Format Only

February 28, 2003

Prepared by:

ENVIRON International Corporation 6001 Shellmound Street Emeryville, California 94608

Prepared for: Contra Costa County Sierra-Crete Task Force11 The Contra Costa County Sierra-Crete Task Force includes representatives from the Contra CostaCounty Health Department, Contra Costa County Public Works Department, Contra Costa County Officeof the County Administrator, Contra Costa County District V Office, Contra Costa County District III Office, California Department of Toxic Substances Control, California Department of Health Services,Central Valley Regional Water Quality Control Board, the Cities of Antioch, Brentwood, Oakley, andPittsburg, DuPont, and other interested parties.

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Pavement Surface Wipe SamplesCollected in Bay Point

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Photo 1a: Surface wipe sample BAY-R2-S collected in Bay Point at approximately 7 feet to the west curb and approximately 10 feet to the south of the property line between properties 513 and 517 on Burdick Drive. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 1b: Surface wipe sample BAY-R2-S collected in Bay Point at approximately 7 feet to the west curb and approximately 10 feet to the south of the property line between properties 513 and 517 on Burdick Drive. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 2a: Surface wipe sample BAY-R12-S collected in Bay Point at approximately 13 feet to the southeast curb and approximately 15 feet to the southwest of the property line between properties 814 and 826 on Dodd Court. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 2b: Surface wipe sample BAY-R12-S collected in Bay Point at approximately 13 feet to the southeast curb and approximately 15 feet to the southwest of the property line between properties 814 and 826 on Dodd Court. The approximate area of wipe sampling was 10 cm by 30 cm within the templateshown.

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Photo 3a: Surface wipe sample BAY-R18-S collected in Bay Point at approximately 6 feet to the east curb and approximately 12 feet to the east of the middle of the intersection of Rapallo Lane and Beaulieu Drive. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 3b: Surface wipe sample BAY-R18-S collected in Bay Point at approximately 6 feet to the east curb and approximately 12 feet to the east of the middle of the intersection of Rapallo Lane and Beaulieu Drive. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 4a: Surface wipe sample BAY-R5-N collected in Bay Point at approximately14 feet to the southeast curb and approximately 16 feet to the west of the property line between properties 604 and 608 on Corliss Street. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 4b: Surface wipe sample BAY-R5-N collected in Bay Point at approximately14 feet to the southeast curb and approximately 16 feet to the west of the property line between properties 604 and 608 on Corliss Street. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 5a: Surface wipe sample BAY-R11-N collected in Bay Point at approximately 10 feet to the southeast curb and 9 feet to the east of the property line between properties 760 and 764 on Steffa Street. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 5b: Surface wipe sample BAY-R11-N collected in Bay Point at approximately 10 feet to the southeast curb and 9 feet to the east of the property line between properties 760 and 764 on Steffa Street. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 6a: Surface wipe sample BAY-R21-N collected in Bay Point at approximately 12 feet to the north curb and approximately 23 feet to the west of the property line between properties 1018 and 1022 on Saint Raphael Drive. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 6b: Surface wipe sample BAY-R21-N collected in Bay Point at approximately 12 feet to the north curb and approximately 23 feet to the west of the propertyline between properties 1018 and 1022 on Saint Raphael Drive. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 7a: Surface wipe sample BAY-R5-H collected in Bay Point at approximately 16 feet to the southeast curb and approximately 12 feet to the east of the property line between properties 636 and 640 on Corliss Street. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 7b: Surface wipe sample BAY-R5-H collected in Bay Point at approximately 16 feet to the southeast curb and approximately 12 feet to the east of the property line between properties 636 and 640 on Corliss Street. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 8a: Surface wipe sample BAY-R2-H collected in Bay Point at approximately 5 feet to the west curb and at the property line between properties 517 and 521 on Burdick Drive. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 8b: Surface wipe sample BAY-R2-H collected in Bay Point at approximately 5 feet to the west curb and at the property line between properties 517 and 521 on Burdick Drive. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 9a: Surface wipe sample BAY-B4-B collected in Bay Point at approximately 9 feet to the west curb and at the property line between properties 617 and 621 on Azores Circle. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 9b: Surface wipe sample BAY-B4-B collected in Bay Point at approximately 9 feet to the west curb and at the property line between properties 617 and 621 on Azores Circle. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 10a: Surface wipe sample BAY-B8-B collected in Bay Point at approximately 3 feet to the southwest curb and approximately 63 feet to the south of the middle of the intersection of Rosemarie Place and Bustos Way. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 10b: Surface wipe sample BAY-B8-B collected in Bay Point at approximately 3 feet to the southwest curb and approximately 63 feet to the south of the middle of the intersection of Rosemarie Place and Bustos Way. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 11a: Surface wipe sample BAY-B11-B collected in Bay Point at approximately 6 feet to the southwest curb and approximately 56 feet to the northwest of the intersection of Bustos Place and Bustos Way. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 11b: Surface wipe sample BAY-B11-B collected in Bay Point at approximately 6 feet to the southwest curb and approximately 56 feet to the northwest of the intersection of Bustos Place and Bustos Way. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Pavement Surface Wipe SamplesCollected in Pittsburg

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Photo 12a: Surface wipe sample PIT-R2-S collected in Pittsburg at approximately 14 feet to the northwest curb and approximately 10 feet to the west of the property line between properties 1751 and 1755 on Peachwillow Street. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 12b: Surface wipe sample PIT-R2-S collected in Pittsburg at approximately 14 feet to the northwest curb and approximately 10 feet to the west of the property line between properties 1751 and 1755 on Peachwillow Street. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 13a: Surface wipe sample PIT-R4-S collected in Pittsburg at approximately 5 feet to the south curb and at the property line between properties 133 and 137 on Spinnaker Way. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 13b: Surface wipe sample PIT-R4-S collected in Pittsburg at approximately 5 feet to the south curb and at the property line between properties 133 and 137 on Spinnaker Way. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 14a: Surface wipe sample PIT-R5-S collected in Pittsburg at approximately 13 feet from the northwest curb and approximately 9 feet to the southwest from the fire hydrant on Builder’s Circle. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 14b: Surface wipe sample PIT-R5-S collected in Pittsburg at approximately 13 feet from the northwest curb and approximately 9 feet to the southwest from the fire hydrant on Builder’s Circle. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 15a: Surface wipe sample PIT-R1-N collected in Pittsburg at approximately 6 feet to the south curb and approximately 15 feet to the east of the edge of the transformer pad on West Leland Road. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 15b: Surface wipe sample PIT-R1-N collected in Pittsburg at approximately 6 feet to the south curb and approximately 15 feet to the east of the edge of the transformer pad on West Leland Road. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 16a: Surface wipe sample PIT-R4-N collected in Pittsburg at approximately 5 feet to the south curb and at the property line between properties 133 and 137 on Spinnaker Way. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 16b: Surface wipe sample PIT-R4-N collected in Pittsburg at approximately 5 feet to the south curb and at the property line between properties 133 and 137 on Spinnaker Way. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 17a: Surface wipe sample PIT-R5-N collected in Pittsburg at approximately 20 feet to the northwest curb and approximately 9 feet to the southwest of the fire hydrant on Builder’s Circle. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 17b: Surface wipe sample PIT-R5-N collected in Pittsburg at approximately 20 feet to the northwest curb and approximately 9 feet to the southwest of the fire hydrant on Builder’s Circle. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 18a: Surface wipe sample PIT-R6-N collected in Pittsburg at approximately 3 feet to the north curb and at the property line between properties 541 and 545 on Fourteenth Street. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 18b: Surface wipe sample PIT-R6-N collected in Pittsburg at approximately 3 feet to the north curb and at the property line between properties 541 and 545 on Fourteenth Street. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 19a: Surface wipe sample PIT-R3-H collected in Pittsburg at approximately 8 feet to the south curb and approximately 2 feet to the north of the property line between properties 1754 and 1758 on Bridgeview Street. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 19b: Surface wipe sample PIT-R3-H collected in Pittsburg at approximately 8 feet to the south curb and approximately 2 feet to the north of the property line between properties 1754 and 1758 on Bridgeview Street. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 20a: Surface wipe sample PIT-B2-B collected in Pittsburg at approximately 11 feet to the southeast curb and approximately 13 feet to the northeast of the middle of the intersection of Avalon Drive and Pebble Beach Loop. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 20b: Surface wipe sample PIT-B2-B collected in Pittsburg at approximately 11 feet to the southeast curb and approximately 13 feet to the northeast of the middle of the intersection of Avalon Drive and Pebble Beach Loop. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 21a: Surface wipe sample PIT-B4-B collected in Pittsburg at approximately 10 feetto the south curb and at the property line between properties 263 and 267 on Pebble Beach Loop. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 21b: Surface wipe sample PIT-B4-B collected in Pittsburg at approximately 10 feet to the south curb and at the property line between properties 263 and 267 on Pebble Beach Loop. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 22a: Surface wipe sample PIT-B6-B collected in Pittsburg at approximately 13 feet to the south curb and approximately 24 feet to the west of the corner of the intersection of Capitola Place and Capitola Drive. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 22b: Surface wipe sample PIT-B6-B collected in Pittsburg at approximately 13 feet to the south curb and approximately 24 feet to the west of the corner of the intersection of Capitola Place and Capitola Drive. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Pavement Surface Wipe SamplesCollected in Antioch

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Photo 23a: Surface wipe sample ANT-R24-S collected in Antioch at approximately 25 feet to the southeast curb and approximately 26 feet to the west of the property line between properties 4108 and 4112 on Amargosa Drive. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 23b: Surface wipe sample ANT-R24-S collected in Antioch at approximately 25 feet to the southeast curb and approximately 26 feet to the west of the property line between properties 4108 and 4112 on Amargosa Drive. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 24a: Surface wipe sample ANT-R83-S collected in Antioch at approximately 19feet to the southeastern curb and approximately 12 feet to the east of the property line between the properties 1717 and 1721 on Mount Hamilton Drive. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 24b: Surface wipe sample ANT-R83-S collected in Antioch at approximately 19 feet to the southeastern curb and approximately 12 feet to the east of the property line between the properties 1717 and 1721 on Mount Hamilton Drive. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 25a: Surface wipe sample ANT-R120-S collected in Antioch at approximately 10 feet to the north curb and approximately 22 feet to the south of the intersection of Prairie Way and Wagon Wheel Way. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 25b: Surface wipe sample ANT-R120-S collected in Antioch at approximately 10 feet to the north curb and approximately 22 feet to the south of the intersectionof Prairie Way and Wagon Wheel Way. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 26a: Surface wipe sample ANT-R6-N collected in Antioch at approximately 7 feet to the east curb and approximately 29 feet to the south of the property line between the properties 500 and 504 on Lemay Way. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 26b: Surface wipe sample ANT-R6-N collected in Antioch at approximately 7 feetto the east curb and approximately 29 feet to the south of the property line between the properties 500 and 504 on Lemay Way. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 27a: Surface wipe sample ANT-R70-N collected in Antioch at approximately 12 feet to the southeast curb and approximately 13 feet to the northeast of the property line between properties 5010 and 5014 on Hollow Ridge Court. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 27b: Surface wipe sample ANT-R70-N collected in Antioch at approximately 12 feet to the southeast curb and approximately 13 feet to the northeast of the property line between properties 5010 and 5014 on Hollow Ridge Court. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 28a: Surface wipe sample ANT-R135-N collected in Antioch at approximately 14 feet to the northeast curb and at the property line between properties 5153 and 5157 on Roundup Way. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 28b: Surface wipe sample ANT-R135-N collected in Antioch at approximately 14 feet to the northeast curb and at the property line between properties 5153 and 5157 on Roundup Way. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 29a: Surface wipe sample ANT-R28-REP collected in Antioch at approximately 13 feet to the east curb and approximately 31 feet to the south of the property line between properties 3305 and 3309 on Kodiak Street. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 29b: Surface wipe sample ANT-R28-REP collected in Antioch at approximately 13 feet to the east curb and approximately 31 feet to the south of the property line between properties 3305 and 3309 on Kodiak Street. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 30a: Surface wipe sample ANT-R37-REP collected in Antioch at approximately 13 feet to the east curb and approximately 28 feet to the south of the property line between properties 4909 and 4913 on Chism Way. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 30b: Surface wipe sample ANT-R37-REP collected in Antioch at approximately 13 feet to the east curb and approximately 28 feet to the south of the property line between properties 4909 and 4913 on Chism Way. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 31a: Surface wipe sample ANT-R3-H collected in Antioch at approximately 12 feet to the southeast curb and approximately 13 feet to the east of the property line between properties 624 and 628 on Burwood Way. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 31b: Surface wipe sample ANT-R3-H collected in Antioch at approximately 12 feet to the southeast curb and approximately 13 feet to the east of the property line between properties 624 and 628 on Burwood Way. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 32a: Surface wipe sample ANT-R30-H collected in Antioch at approximately 19 feet to the north curb and approximately 31 feet to the west of the property line between properties 4501 and 4505 on Golden Bear Drive. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 32b: Surface wipe sample ANT-R30-H collected in Antioch at approximately 19 feet to the north curb and approximately 31 feet to the west of the property line between properties 4501 and 4505 on Golden Bear Drive. The approximate area of wipe sampling was 10 cm by 30 cm within the templateshown.

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Photo 33a: Surface wipe sample ANT-B2-B collected in Antioch at approximately 10 feet to the north curb and approximately 50 feet to the east of the property line between the properties 2426 and 2430 on Whitetail Drive. The approximatearea of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 33b: Surface wipe sample ANT-B2-B collected in Antioch at approximately 10 feet to the north curb and approximately 50 feet to the east of the property line between the properties 2426 and 2430 on Whitetail Drive. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 34a: Surface wipe sample ANT-B6-B collected in Antioch at approximately 25 feet to the west curb and approximately 11 feet to the east of the property line between properties 2328 and 2334 on Reindeer Court. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 34b: Surface wipe sample ANT-B6-B collected in Antioch at approximately 25 feet to the west curb and approximately 11 feet to the east of the property line between properties 2328 and 2334 on Reindeer Court. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 35a: Surface wipe sample ANT-B13-B collected in Antioch at approximately 12 feet to the east curb and approximately 30 feet to the south of the property line between properties 2520 and 2524 on Hooftrail Way. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 35b: Surface wipe sample ANT-B13-B collected in Antioch at approximately 12 feet to the east curb and approximately 30 feet to the south of the property line between properties 2520 and 2524 on Hooftrail Way. The approximate areaof wipe sampling was 10 cm by 30 cm within the template shown.

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Pavement Surface Wipe SamplesCollected in Oakley

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Photo 36a: Surface wipe sample OAK-R12-S collected in Oakley at approximately 4 feet to the north curb and approximately 36 feet to the east of the intersection of Wisteria Court and La Casa Drive. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 36b: Surface wipe sample OAK-R12-S collected in Oakley at approximately 4 feet to the north curb and approximately 36 feet to the east of the intersection of Wisteria Court and La Casa Drive. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 37a: Surface wipe sample OAK-R31-S collected in Oakley at approximately 15 feet to the southwest curb and approximately 30 feet to the west of the property line between properties 1889 and 1893 on East Summerfield Court.The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 37b: Surface wipe sample OAK-R31-S collected in Oakley at approximately 15 feet to the southwest curb and approximately 30 feet to the west of the property line between properties 1889 and 1893 on East Summerfield Court.The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 38a: Surface wipe sample OAK-R89-S collected in Oakley at approximately 15 feet to the west curb and approximately 20 feet to the south of the property line between properties 3885 and 3889 on Oak Grove Court. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 38b: Surface wipe sample OAK-R89-S collected in Oakley at approximately 15 feet to the west curb and approximately 20 feet to the south of the property line between properties 3885 and 3889 on Oak Grove Court. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 39a: Surface wipe sample OAK-R16-N collected in Oakley at approximately 10 feet to the northwest curb and at the property line between properties 4885 and 4893 on Carrington Drive. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 39b: Surface wipe sample OAK-R16-N collected in Oakley at approximately 10 feet to the northwest curb and at the property line between properties 4885 and 4893 on Carrington Drive. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 40b: Surface wipe sample OAK-R78-N collected in Oakley at approximately 11 feet to the north curb and approximately 2 feet to the east of the property line between properties 225 and 229 on Northgate Place. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 40b: Surface wipe sample OAK-R78-N collected in Oakley at approximately 11 feet to the north curb and approximately 2 feet to the east of the property line between properties 225 and 229 on Northgate Place. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 41a: Surface wipe sample OAK-R46-N collected in Oakley at approximately 11 feet to the north curb and approximately 7 feet to the west of the property line between properties 200 and 206 on Meadow Creek Court. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 41b: Surface wipe sample OAK-R46-N collected in Oakley at approximately 11 feet to the north curb and approximately 7 feet to the west of the property line between properties 200 and 206 on Meadow Creek Court. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 42a: Surface wipe sample OAK-R21-H collected in Oakley at approximately 10 feet to the east curb and approximately 10 feet north of the property line of the Oakley Manor Apartments parking lot on Kelsey Lane. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 42b: Surface wipe sample OAK-R21-H collected in Oakley at approximately 10 feet to the east curb and approximately 10 feet north of the property line of the Oakley Manor Apartments parking lot on Kelsey Lane. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 43a: Surface wipe sample OAK-R37-H collected in Oakley at approximately 7 feet to the east curb and approximately 32 feet to the north of the property line between properties 5038 and 5042 on Gaspar Court. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 43b: Surface wipe sample OAK-R37-H collected in Oakley at approximately 7 feet to the east curb and approximately 32 feet to the north of the property line between properties 5038 and 5042 on Gaspar Court. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 44a: Surface wipe sample OAK-R70-H collected in Oakley at approximately 26 feet to the east curb and approximately 20 feet to the north of the property line between properties 3881 and 3887 on Acorn Drive. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 44b: Surface wipe sample OAK-R70-H collected in Oakley at approximately 26 feet to the east curb and approximately 20 feet to the north of the property linebetween properties 3881 and 3887 on Acorn Drive. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 45a: Surface wipe sample OAK-R92-H collected in Oakley at approximately 24 feet to the north curb and approximately 18 feet to the west of the property line between properties 112 and 116 on Heritage Court. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 45b: Surface wipe sample OAK-R92-H collected in Oakley at approximately 24 feet to the north curb and approximately 18 feet to the west of the property line between properties 112 and 116 on Heritage Court. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 46a: Surface wipe sample OAK-R77-H collected in Oakley at approximately 10 feet to the north curb and approximately 14 feet to the east of the property line between properties 126 and 130 on Meadows Court. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 46b: Surface wipe sample OAK-R77-H collected in Oakley at approximately 10 feet to the north curb and approximately 14 feet to the east of the property line between properties 126 and 130 on Meadows Court. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 47a: Surface wipe sample OAK-B3-B collected in Oakley at approximately 13 feet to the northeast curb and 19 feet to the southeast of the property line between properties 650 and 654 on Frazier Drive. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 47b: Surface wipe sample OAK-B3-B collected in Oakley at approximately 13 feet to the northeast curb and 19 feet to the southeast of the property line between properties 650 and 654 on Frazier Drive. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 48a: Surface wipe sample OAK-B4-B collected in Oakley at approximately 12 feetto the west curb and approximately 18 feet to the north of the property line between properties 3900 and 3904 on Cloverbrook Avenue. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 48b: Surface wipe sample OAK-B4-B collected in Oakley at approximately 12 feet to the west curb and approximately 18 feet to the north of the property line between properties 3900 and 3904 on Cloverbrook Avenue. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 49a: Surface wipe sample OAK-B6-B collected in Oakley at approximately 11 feet to the northeast curb and at the property line between properties 3808 and 3812 on Armstrong Court. The approximate area of wipe sampling was 10cm by 30 cm within the template shown.

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Photo 49b: Surface wipe sample OAK-B6-B collected in Oakley at approximately 11 feet to the northeast curb and at the property line between properties 3808 and 3812 on Armstrong Court. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Pavement Surface Wipe SamplesCollected in Brentwood

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Photo 50a: Surface wipe sample BRE-A-S collected in the parking lot of a commercial facility in Brentwood as shown on Figure 4. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 50b: Surface wipe sample BRE-A-S collected in the parking lot of a commercial facility in Brentwood as shown on Figure 4. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 51a: Surface wipe sample BRE-B-S collected in the parking lot of a commercial facility in Brentwood as shown on Figure 4. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 51b: Surface wipe sample BRE-B-S collected in the parking lot of a commercial facility in Brentwood as shown on Figure 4. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 52a: Surface wipe sample BRE-C-S collected in the parking lot of a commercialfacility in Brentwood as shown on Figure 4. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 52b: Surface wipe sample BRE-C-S collected in the parking lot of a commercial facility in Brentwood as shown on Figure 4. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 53a: Surface wipe sample BRE-D-N collected in the parking lot of a commercial facility in Brentwood as shown on Figure 4. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 53b: Surface wipe sample BRE-D-N collected in the parking lot of a commercial facility in Brentwood as shown on Figure 4. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 54a: Surface wipe sample BRE-E-N collected in the parking lot of a commercial facility in Brentwood as shown on Figure 4. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 54b: Surface wipe sample BRE-E-N collected in the parking lot of a commercial facility in Brentwood as shown on Figure 4. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 55a: Surface wipe sample BRE-F-N collected in the parking lot of a commercial facility in Brentwood as shown on Figure 4. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 55b: Surface wipe sample BRE-F-N collected in the parking lot of a commercialfacility in Brentwood as shown on Figure 4. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Pavement Surface Wipe SamplesCollected at the Stoneman Elementary School

in Pittsburg

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Photo 56a: Surface wipe sample LOV-A-S collected in the south paved playground at Stoneman Elementary School in Pittsburg as shown in Figure 5. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 56b: Surface wipe sample LOV-A-S collected in the south paved playground at Stoneman Elementary School in Pittsburg as shown in Figure 5. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 57a: Surface wipe sample LOV-B-S collected in the north paved playground at Stoneman Elementary School in Pittsburg as shown in Figure 5. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 57b: Surface wipe sample LOV-B-S collected in the north paved playground at Stoneman Elementary School in Pittsburg as shown in Figure 5. The approximate area of wipe sampling was 10 cm by 30 cm within the templateshown.

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Photo 58a: Surface wipe sample LOV-C-S collected in the trash enclosure at Stoneman Elementary School in Pittsburg as shown in Figure 5. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 58b: Surface wipe sample LOV-C-S collected in the trash enclosure at Stoneman Elementary School in Pittsburg as shown in Figure 5. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 59a: Surface wipe sample LOV-D-S collected in the bus turnaround lane at Stoneman Elementary School in Pittsburg as shown in Figure 5. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 59b: Surface wipe sample LOV-D-S collected in the bus turnaround lane at Stoneman Elementary School in Pittsburg as shown in Figure 5. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 60a: Surface wipe sample LOV-F-N collected in the south paved playground at Stoneman Elementary School in Pittsburg as shown in Figure 5. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 60b: Surface wipe sample LOV-F-N collected in the south paved playground at Stoneman Elementary School in Pittsburg as shown in Figure 5. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 61a: Surface wipe sample LOV-G-N collected in the north paved playground at Stoneman Elementary School in Pittsburg as shown in Figure 5. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 61b: Surface wipe sample LOV-G-N collected in the north paved playground at Stoneman Elementary School in Pittsburg as shown in Figure 5. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 62a: Surface wipe sample LOV-H-N collected in the trash enclosure at Stoneman Elementary School in Pittsburg as shown in Figure 5. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 62b: Surface wipe sample LOV-H-N collected in the trash enclosure at Stoneman Elementary School in Pittsburg as shown in Figure 5. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 63a: Surface wipe sample LOV-I-N collected in the bus turnaround lane at Stoneman Elementary School in Pittsburg as shown in Figure 5. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 63b: Surface wipe sample LOV-I-N collected in the bus turnaround lane at Stoneman Elementary School in Pittsburg as shown in Figure 5. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Pavement Surface Wipe SamplesCollected at the O’Hara Park Middle School

in Oakley

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Photo 64a: Surface wipe sample OHA-A-S collected in the small northwest parking lot at O’Hara Park Middle School in Oakley as shown in Figure 6. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 64b: Surface wipe sample OHA-A-S collected in the small northwest parking lot at O’Hara Park Middle School in Oakley as shown in Figure 6. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 65a: Surface wipe sample OHA-B-S collected in the small northwest parking lot at O’Hara Park Middle School in Oakley as shown in Figure 6. The approximate area of wipe sampling was 10 cm by 30 cm within the templateshown.

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Photo 65b: Surface wipe sample OHA-B-S collected in the small northwest parking lot at O’Hara Park Middle School in Oakley as shown in Figure 6. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 66a: Surface wipe sample OHA-C-N collected in the small northwest parking lot at O’Hara Park Middle School in Oakley as shown in Figure 6. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 66b: Surface wipe sample OHA-C-N collected in the small northwest parking lot at O’Hara Park Middle School in Oakley as shown in Figure 6. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 67a: Surface wipe sample OHA-D-N collected in the small northwest parking lot at O’Hara Park Middle School in Oakley as shown in Figure 6. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 67b: Surface wipe sample OHA-D-N collected in the small northwest parking lot at O’Hara Park Middle School in Oakley as shown in Figure 6. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Pavement Surface Wipe SamplesCollected at the Antioch Youth Sports Complex

in Antioch

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Photo 68a: Surface wipe sample YOU-A-S collected in the parking lot at the Antioch Youth Sports Complex as shown in Figure 7. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 68b: Surface wipe sample YOU-A-S collected in the Antioch Youth Sports Complex parking lot as shown in Figure 7. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 69a: Surface wipe sample YOU-B-S collected in the Antioch Youth Sports Complex parking lot as shown in Figure 7. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 69b: Surface wipe sample YOU-B-S collected in the Antioch Youth Sports Complex parking lot as shown in Figure 7. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 70a: Surface wipe sample YOU-C-S collected in the Antioch Youth Sports Complex parking lot as shown in Figure 7. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 70b: Surface wipe sample YOU-C-N collected in the Antioch Youth Sports Complex parking lot as shown in Figure 7. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 71a: Surface wipe sample YOU-D-N collected in the Antioch Youth Sports Complex parking lot as shown in Figure 7. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Photo 71b: Surface wipe sample YOU-D-N collected in the Antioch Youth Sports Complex parking lot as shown in Figure 7. The approximate area of wipe sampling was 10 cm by 30 cm within the template shown.

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Pavement Surface Particulate SamplesCollected in Bay Point and Antioch

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Photo 72a: Pavement crack particulate sample BAY-R2-D collected in Bay Point along Burdick Drive at Powell Drive.

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Photo 72b: Pavement crack particulate sample BAY-R2-D collected in Bay Point along Burdick Drive at Powell Drive.

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Photo 72c: Pavement crack particulate sample BAY-R2-D collected in Bay Point along Burdick Drive at Powell Drive.

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Photo 72d: Pavement crack particulate sample BAY-R2-D collected in Bay Point along Burdick Drive at Powell Drive.

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Photo 73a: Pavement crack particulate sample ANT-R73-D collected in Antioch at along Rock Spring Way between Pinehaven Way and Dallas Ranch Road.

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Photo 73b: Pavement crack particulate sample ANT-R73-D collected in Antioch at along Rock Spring Way between Pinehaven Way and Dallas Ranch Road.

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Soil Borings in Bay Point

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Photo 74: Soil boring ENV-14 located along Rapallo Lane in Bay Point.

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Photo 75: Soil boring ENV-15 located along Jill Avenue in Bay Point.

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Photo 76: Soil boring ENV-20 located along Azores Circle in Bay Point.

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Soil Borings in Pittsburg

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Photo 77: Soil boring ENV-11 located along West Leland Road in Pittsburg.

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Photo 78: Soil boring ENV-19 located along Avalon Circle in Pittsburg.

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Soil Borings in Antioch

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Photo 79: Soil boring ENV-1 located along Laurel Road in Antioch.

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Photo 80: Soil boring ENV-2 located along Golden Bear Drive in Antioch.

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Photo 81: Soil boring ENV-3 located along Morgan Way in Antioch.

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Photo 82: Soil boring ENV-4 located along Burwood Way in Antioch.

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Photo 83: Soil boring ENV-5 located along Mark Twain Drive in Antioch.

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Photo 84: Soil boring ENV-6 located along Kushner Way in Antioch.

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Photo 85: Soil boring ENV-7 located along Catanzaro Way in Antioch.

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Photo 86: Soil boring ENV-8 located along Sugar Pine Street in Antioch.

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Photo 87: Soil boring ENV-9 located along Galloway Court in Antioch.

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Photo 88: Soil boring ENV-10 located along Judsonville Drive in Antioch.

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Photo 89: Soil boring ENV-12 located along Longbranch Way in Antioch.

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Photo 90: Soil boring ENV-18 located along Whitetail Drive in Antioch.

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Soil Borings in Oakley

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Photo 91: Soil boring ENV-13 located along Bayside Way in Oakley.

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Photo 92: Soil boring ENV-16 located along La Vista Drive in Oakley.

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Photo 93: Soil boring ENV-17 located along Frazier Drive in Oakley.

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Sierra-Crete® Samples fromStoneman Elementary School in Pittsburg,O’Hara Park Middle School in Oakley, and

the Antioch Youth Sports Complex in Antioch

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Photo 94: Sierra-Crete® sample LOV-Z-SC located in the bus loading/unloading lane at Stoneman Elementary School in Pittsburg.

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Photo 95a: Sierra-Crete® sample OHA-Z-SC located in the small northwest parking lot at O’Hara Middle School in Oakley.

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Photo 95b: Sierra-Crete® sample OHA-Z-SC located in the small northwest parking lot at O’Hara Middle School in Oakley.

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Photo 96: Sierra-Crete® sample YOU-Z-SC located in the parking lot at the Antioch Youth Sports Complex in Antioch.