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DPT equipment typically generates minimal, if any soil cuttings. Any cuttings that are generated will be <br /> returned to the probe holes prior to filling the holes with bentonite chips or cement slurry. <br /> Groundwater Investigation <br /> BB&J proposes groundwater investigation tasks to establish the direction of groundwater flow and the <br /> quality of groundwater near the boundaries of the property. This information will indicate whether <br /> groundwater at the property is degraded, and —if degraded- whether the source of degradation is <br /> located onsite or offsite. <br /> BB&J will sample as follows: <br /> • Six soil borings will be advanced at the Subject Property using truck-mounted direct push <br /> equipment to an approximate depth of 21-feet below ground surface (bgs) <br /> • Groundwater samples will be collected at or near the soil/groundwater interface by driving <br /> a hydropunch sampler ahead of the drilling rods into undisturbed soil <br /> • Groundwater samples will be analyzed by a California-certified laboratory for the following <br /> COCS: <br /> — Total petroleum hydrocarbon (TPH)gasoline range organics (GRO) using USEPA Method <br /> 80158 <br /> — Benzene, toluene, ethylbenzene, and xylene (BTEX) and methyl tertiary butyl ether <br /> (MTBE) by United States Environmental Protection Agency (USEPA) Method 82608 <br /> BB&J will prepare equipment rinsate samples and a trip blank for the ground-water investigation, which <br /> will be analyzed for TPH-GRO, BTEX, and MTBE. BB&1 field personnel will log and classify soil samples in <br /> the field using the Unified Soil Classification System, under the supervision of a California Professional <br /> Geologist. <br /> • California Assessment Manuals(CAM) metals using USEPA Method 6010B/7471A and Titanium <br /> • OC Pesticides per USEPA 8141A <br /> Reporting <br /> BB&J will prepare a report to include soil and groundwater sample results. It will also contain the <br /> support data to include analytical data sheets and chain of custody documents. Conclusions will be <br /> based on information reviewed and site conditions observed. <br /> 4 <br /> Three Embarcadero Center 131"Floor,San Francisco,CA 94111 <br />