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v - <br /> 16 March 2000 <br /> AGE-NC Project No. 99-0683 <br /> Page 3 of 5 <br /> 3.0. PROCEDURES <br /> On 09 February 2000, three soil probe borings (B-1 through B-3) were advanced at the site as part <br /> of assessment activities related to the two former USTs. The field work was conducted as outlined <br /> in the PHS-EHD-approved work plan dated 27 December 1999. <br /> 3.1. DRILLING ACTIVITIES <br /> Soil probe borings B-1 through B-3 were advanced utilizing a van-mounted Geoprobe 5400 <br /> equipped with 1.125-inch diameter probe rods with an attached 2.15-inch diameter soil sampler, <br /> using "direct push" technology. Soil probe borings B-1 through B-3 were advanced vertically to a <br /> depth of 30 feet bsg. <br /> 3.1.1. Soil Sample Collection <br /> Discrete soil samples were collected at 5-foot intervals, beginning at 5 feet bsg,to total depth of each <br /> boring. Soil samples were collected using a Geoprobe soil sampling assembly loaded with four pre- <br /> cleaned 1.125-inch by 6-inch brass sleeves. Soil samples were preserved by covering both ends of <br /> the brass sleeve with Teflon sheets, capping, and sealing with tape. Each sample sleeve was labeled <br /> with soil probe boring location, depth, time, date and sampler's initials. <br /> Each preserved sample was logged on a chain-of-custody form, placed in a chilled container and <br /> _ transported to a California Department of Health Services (DHS)-certified laboratory under chain <br /> of custody; selected samples were analyzed for: <br /> _ 0 Total petroleum hydrocarbons quantified as diesel (TPH-d) by EPA Method 8015Modified; <br /> • Volatile aromatic compounds-benzene, toluene, ethyl-benzene, and total xylenes (BTEX) <br /> and methyl tertiary butyl ether (MTBE) by EPA Method 8020. <br /> 3.1.2 . Ground Water Sample Collection <br /> Ground water was not encountered during the boring process, therefore no ground water samples <br /> were collected. <br /> Advanced CeoEinirunmental,Inc. <br />