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o`J— <br /> coordinated with a representative of the Subject Property is required to locate any on-site underground <br /> utilities in the project area. <br /> Soil Investigation <br /> BB&J's field scientist will coordinate location selection and sampling (see Figure 1) with consideration of <br /> the following: <br /> • Tailings pond that received waste from magnesium processing plant <br /> • Storage and other related areas impacted by fertilizer and pesticide operation <br /> • Location where septic tanks that were removed <br /> • Area of historic fueling system <br /> BB&1 will oversee the advancement of 10 soil probes (GP-1 through GP-10), using direct-push <br /> technology (i.e. Geoprobe®) to a depth of 15-feet below ground surface (bgs) or until ground-water is <br /> encountered,or until refusal, whichever is shallower. <br /> Soil samples will be collected continuously until the termination depth of each soil probe. BB&J will <br /> collect one "worst-case' soil sample from each soil probe location to assess the potential for COCs to <br /> have impacted the subsurface [the sample assessed will be the sample exhibiting the highest field- <br /> screening measurement, visual signs of impact(e.g.,one sample is stained and the other samples are not <br /> at the probe location), olfactory indications of impact,and/or a combination of any of these]. BBW field <br /> personnel will log and classify soil samples in the field using the Unified Soil Classification System, under <br /> the supervision of a California Professional Geologist. The soil samples will be capped, labeled and <br /> placed in a chilled ice chest for delivery to a State-certified laboratory for analytical testing. Chain-of <br /> custody documentation will accompany the soil samples at all times. <br /> The soil samples collected from GP-1 through GP-10 will be submitted for the following laboratory <br /> analyses: <br /> • Total petroleum hydrocarbon (TPH)gasoline range organics(GRO) using USEPA Method 8015B <br /> • Benzene, toluene, ethylbenzene, and xylene (BTEX) and methyl tertiary butyl ether (MTBE) by <br /> United States Environmental Protection Agency(USEPA) Method 82608 <br /> • California Assessment Manuals(CAM) metals using USEPA Method 601oB/7471A and Titanium <br /> • OC Pesticides per USEPA 8141A <br /> On-site qualified BB&J professionals will supervise drilling. Sampling will include the collection and <br /> laboratory analyses of Quality Assurance/Quality Control samples consisting of equipment rinsate blank. <br /> 3 <br /> Three Embarcadero Center 13`h Floor,San Francisco,CA 94111 <br />