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Table 1:Sampling and Analysis Plan Gesoyntec Consultants,Inc <br /> Park Woods Shopping Center <br /> 1762 West Hammer Lane <br /> Stockton,California <br /> Sample Depth Number of Samples per Analysis <br /> Sample Location Matrix l VOCs Helium2 Rationale <br /> (feet bgs) EPA Method TO-15 EPA Method TO-15 SIM ASTM D-1946 <br /> SV-1 Soil Vapor 5 1 1 Assess potential releases from the sanitary sewer main by collecting samples above and below the main line. <br /> SV-2 Soil Vapor 15 1 1 Assess potential releases from the sanitary sewer main by collecting samples above and below the main line. <br /> SV-3 Soil Vapor 5 1 1 Assess potential releases from the sanitary sewer main by collecting samples above and below the main line. <br /> VP-1 Sub-Slab Soil Vapor -- 1 Evaluate potential future VI in Site buildings <br /> VP-2 Sub-Slab Soil Vapor -- 1 I Evaluate potential future VI in Site buildings <br /> VP-3 Sub-Slab Soil Vapor -- 1 Evaluate potential future VI in Site buildings <br /> VP-4 Sub-Slab Soil Vapor -- 1 1 Evaluate potential future VI in Site buildings <br /> VP-5 Sub-Slab Soil Vapor -- 1 Evaluate potential future VI in Site buildings <br /> VP-6 Sub-Slab Soil Vapor -- 1 1 Evaluate potential fixture VI in Site buildings <br /> IA-3 Indoor Air -- 1 Evaluate PCE concentrations in indoor air of Site buildings in opposite season of previous sampling event to assess <br /> seasonal variability of PCE concentrations <br /> IA-4 Indoor Air -- 1 Evaluate PCE concentrations in indoor air of Site buildings in opposite season of previous sampling event to assess <br /> seasonal variability of PCE concentrations <br /> IA-5 Indoor Air -- 1 Evaluate PCE concentrations in indoor air of Site buildings in opposite season of previous sampling event to assess <br /> seasonal variability of PCE concentrations <br /> IA-6 Indoor Air -- 1 Evaluate PCE concentrations in indoor air of Site buildings in opposite season of previous sampling event to assess <br /> seasonal variability of PCE concentrations <br /> IA-7 Indoor Air -- 1 Evaluate PCE concentrations in indoor air of Site buildings in opposite season of previous sampling event to assess <br /> seasonal variability of PCE concentrations <br /> IA-8 Indoor Air -- 1 Evaluate PCE concentrations in indoor air of Site buildings in opposite season of previous sampling event to assess <br /> seasonal variability of PCE concentrations <br /> OA-1 3 Outdoor Air -- 1 Evaluate PCE concentrations in indoor air of Site buildings in opposite season ofprevious sampling event to assess <br /> seasonal variability of PCE concentrations <br /> OA-2 Outdoor Air 1 <br /> Evaluate PCE concentrations in indoor air of Site buildings in opposite season of previous sampling event to assess <br /> seasonal variability of PCE concentrations <br /> OA-3 3 Outdoor Air -- I Evaluate PCE concentrations in indoor air of Site buildings in opposite season ofprevious sampling event to assess <br /> seasonal variability of PCE concentrations <br /> Notes: <br /> 1)The depth of the soil vapor probes may vary in the field pending sub-surface conditions observed. <br /> 2)50%of sub-slab soil vapor and soil vapor samples collected will be analyzed for helium as a quality control measure. <br /> 3)Indoor air samples will be collected over an approximate 8-hour time period,while outdoor air samples will be collected over an approximate 10-hour time period,starting one hour before and ending one hour after indoor air samples. <br /> Abbreviations: <br /> ASTM=American Society for Testing and Materials <br /> bgs=below ground surface <br /> EPA=United States Environmental Protection Agency <br /> IA=indoor air <br /> OA=outdoor air <br /> PCE=tetrachloroethylene <br /> VOCs=volatile organic compounds <br /> 1 of 1 <br />