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SJCEHD December 8,2006 Page 3 extending to approximately 50 feet bgs, and will be constructed with Schedule 40 PVC casing with 5 feet of 0.010-inch slotted screen extending from approximately 45 feet to 50 feet bgs. • Monitoring Well Development/Sampling/Analysis. The newly installed groundwater monitoring well will be developed by rigorously surging the well over the length of the screen interval and by purging approximately 10 casing volumes of water. Groundwater samples will be collected and analyzed for the presence of TPHg, BTEX,fuel oxygenates(MtBE, DIPE,TAME, EtBE,TBA and ethanol),and lead scavengers (1,2-DCA and EDB) by EPA Method 82606. • Well Surveying. Following installation, the newly installed groundwater well will be surveyed by a licensed surveyor to a local benchmark relative to mean sea level. Survey data including elevation, longitude, and latitude will be included in information uploaded to the State Water Resources Control Board (SWRCB) Geotracker Database (www.swrcb.geotracker.ca.gov) in accordance with Assembly Bill (AB) 2886 requirements. • Compliance with AB 2886 Requirements. Also per AB 2886 requirements, SECOR will electronically upload the data obtained during this investigation into the SWRCB Geotracker Database (www.swrcb._ eotracker.ca.gov). Documentation of the electronic data format(EDF)submittals will be included in the final report. • Soil and Water Disposal. Soil cuttings and purge/rinsate water generated during well installation activities will temporarily be stored in California Department of Transportation (DOT)-approved, 55-gallon steel drums on-site pending characterization and disposal. The drums containing soil and rinsate/purge water will be removed by Filter Recycling Services and transported to their facility for proper disposal. • Report. Fallowing the completion of well installation activities, SECOR will submit a report documenting the findings. The report will include soil boring logs, soil and groundwater analytical results, chain-of-custody documentation, conclusions, and recommendations for future work if needed. SCHEDULE Upon approval of this work plan, SECOR is prepared to initiate investigation activities with field work beginning approximately three to four weeks after the work plan is approved and the permit is received. A report documenting investigation activities will be provided to the SJCEHD within six to eight weeks of the completion of field work and the receipt of laboratory analytical data. IMP-ARC0105 BP-COP Sites1111941Work PIan111194 Vertical Delineation WP.doc