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Site Assessment Report, Site Conceptual Model, and Site Investigation Work Plan R & L Diesel Services, 2417 West Lane. Stockton, California, 95205 4.2.2 Groundwater Sampling and Analysis WRM proposes to advance borings B-1A and 13-2A to groundwater and collect grab groundwater samples. Groundwater is anticipated to be encountered at approximately 50 feet below grade, but may be as deep as 60 feet. Should field indications indicate impacted groundwater in borings 13-1A and/or 13-2A, additional �. groundwater samples may be collected from borings B-5 and/or B-7 to help define the extent of impacted groundwater. Groundwater samples will be collected using a disposable bailer or bladder pump. The groundwater samples will be placed in clean glass sample containers, sealed, packaged in an iced cooler, and transported with chain-of-custody documentation to a state of California- certified hazardous waste testing laboratory for analysis. Each of the groundwater samples will be analyzed on a standard turn-around time for TPH-D and TPH-G by EPA Method 8015M and for volatile organic compounds, including BTEX and PCE, by EPA Method 8260B. 4.3 Waste Management Unused soil from direct push boring will placed in DOT-approved 55-gallon drums, labeled as non-hazardous drill cuttings and stored on-site until the soil is profiled for disposal. A composite sample of the drill cuttings will taken to characterize this material for disposal and analyzed for TPHD, TPHG, BTEX and PCE, using EPA Methods 8015M and 826013, respectively. The drill cuttings sample will be additionally analyzed for lead using EPA Method 6010. 4.4 Reports 4.4.1 Site Investigation Re ort Upon completion of the site assessment work plan, WRM will submit a report documenting the results of the field work and analytical testing, including a summary of the petroleum " hydrocarbon and chlorinated hydrocarbon constituents detected and site status recommendations. The report will include an updated Site Conceptual Model, including lithologic cross sections, boring logs and a cumulative summary of soil and groundwater analytical data. The report will be prepared in accordance with Appendix A - Tri-Regional Board Staff Recommendations for Preliminary Investigation and Evaluation of Underground Tank Sites. 4.4.2 Sensitive Receptor Survey In accordance with Section 2654(b)(2), Article, Chapter 16, Division 3, Title 23 of the California Code of Regulations, a sensitive receptor survey will be conducted for the site. This survey will include a regulatory file review (well search) at the California Department of Water Resources of groundwater wells and monitoring wells located within a 2,000-foot radius of the subject site. The report will include copies of Department of Water Resources files for any wells present within this radius. The sensitive receptor survey will also identify the locations of other sensitive receptors such as schools, day care facilities, nursing homes, surface water features, etc. 1(l �.