Laserfiche WebLink
January 28, 1987 Carnation Company/Can Division #TK-13 Page: 2 <br /> hydrocarbons in soil adjacent to the tank, if present, 2) to evaluate the <br /> directional bias of soil contamination for further investigation if required. <br /> Phase 2 of the program will depend on whether product is present and <br /> will consist primarily of completion of other borings in order to determine <br /> more accurately the horizontal and vertical extent of soil contamination. <br /> The following Phase 1 work elements will be implemented at the Stockton <br /> site: <br /> 1. The installation of three soil borings adjacent to the tank excavation <br /> pit, located as shown on the Site Plan. <br /> 2. Description of subsurface conditions at the site as revealed in the <br /> borings. <br /> 3. Collection and classification of relatively undisturbed soil samples <br /> taken at five feet beneath the surface and at five feet intervals <br /> thereafter, within the unsaturated zone, both for laboratory analyses <br /> and sieve analyses. Soil samples will be tested for total hydrocarbons <br /> except at the base of the hole which will also be tested for volatile <br /> aromatics in the groundwater. <br /> 4. Collection of initial water samples for testing if groundwater is <br /> encountered before uncontaminated soil is reached. <br /> S. Laboratory analysis for total hydrocarbons will be completed on all <br /> soil, and EPA Method 8020 and BTX tests will be completed on all water <br /> samples. <br /> 6. Sieve analyses of geologic samples to determine shear angles of under- <br /> lying sediments prior to excavation. <br /> 7. Preparation of a report signed by our State-Registered personnel, <br /> summarizing our findings, conclusions and recommendations. <br /> 8. Proposal of Phase 2 course of action. <br /> SOIL. BORING/SAMPLES <br /> Soil borings will be excavated using a truck-mounted drill rig equipped <br /> with six-to-ten inch continuous flight, hollow stem augers or a Vibra-core <br /> vibrational drill. All augers will be steam-cleaned prior to use to minimize <br /> the possibility of cross-contamination. Bore holes will be logged as drilled, <br /> and soil samples will be classified in accordance with the Unified Soil Classi- <br /> fication System. <br /> During drilling, soil samples will be collected at five foot intervals <br /> beginning at a depth of five feet using a California modified split-spoon <br /> sampler containing cleaned brass sleeves. All soil samples collected for <br /> possible analyses will be capped with aluminum foil lined lids, sealed with tape, <br />