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Site Investigation Work Plan _ Country Market (`/J 10476 West Linne Road, Tracy, California a ntea'g ro u p Antea Group Project No. CTRVMKT underground utilities in the vicinity of the proposed borings. Antea Group will notify the appropriate site contacts and the SICEHD approximately five (5) days prior to commencing field activities i 4.3 Soil Sampling During boring advancement, Antea Group will collect continuous soil samples for lithologic logging using the field procedures outlined in Appendix A: An Antea Group geologist will log the lithology in accordance with the Unified Soil Classification System and will screen the soil samples for volatile organic vapors at approximately 1-foot intervals using a photoionization -- detector (PID). We will record PID readings on the respective boring logs. Antea Group will submit soil samples for laboratory analysis as follows: • At depths of 5-, 10- and 15-feet bgs in borings SB-1 through S13-4; • At depths of 10-, 15- and 20-feet bgs in boring SB-5; • Additional samples will be retained for laboratory analyses if elevated PID readings are detected, or soil staining is observed . - i (_ Antea Group will label the soil sample retained for laboratory analysis with a unique sample name and place the sample In an ice-cooled chest following chain-of-custody documentation. Antea Group will submit the soil samples to a National Environmental Laboratory Accreditation Program (NELAP) certified laboratory for the following � — analyses: • Gasoline Range Organics (GRO), using EP EPA Test Method 8260Bbenzene, toluene, ethylbenzene, xylenes (collectively BTEX) and methyl tertiary-butyl ether (MTBE) by EPA Test Method 826013; • Total lead by EPA Method 6010. GrfL/ ntic-&0ev Z P ' ' 1•) d Eta f3 SII 4.4 Groundwater Sampling Due to the anticipated depth to groundwater at the site being greater than 100-feet bgs and the depth of the former tank bottoms at approximately 7-feet bgs, no groundwater sampling is proposed unless deeper soil -. samples obtained during this Investigation contain concentrations of GRO or BTEX compounds above environmental screening levels. / 4.5 Disposal of Investigation Derived Waste The licensed driller will place soil cuttings and wastewater generated during investigation activities into lDepartment of Transportation (DOT) approved 55-gallon drums, andseal, and label them in accordance with DOT protocols for non-hazardous waste. Antea Group will temporarily store the drums on-site, pending receipt of analytical data. Upon receipt of the results, Antea Group's waste management contractor will transport and J dispose of the investigation-derived waste at an appropriate facility. 3 L