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' 17 April 2000 <br /> • AGE-NC Project No 00-0696 <br />' Page 3 of 7 <br />' 3.0. PROCEDURES <br /> On 22 March 2000, four soil probe borings (B-1 through B-4) were advanced at the site as part of <br />' assessment activities related to the two former USTs The field work was conducted as outlined in <br /> the PH S-EHD-approved work plan dated 28 February 2000 <br />' 3 1 DRILLING ACTIVITIES <br />' Soil probe borings B-1 through B-4 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 boring B-1 was advanced vertically to a depth of 30 feet <br /> bsg, B-2, B-3, and B-4 were advanced to 20 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 Selected <br /> samples were analyzed for <br /> • Total Petroleum Hydrocarbons as gasoline (TPH-g) by EPA Method 8015 Modified, <br /> • Volatile aromatic compounds - benzene, toluene, ethyl-benzene, and total xylenes (BTEX) <br /> Iby EPA Method 8020, and <br /> • Tertiary butanol (TBA), di-Isopropyl ether (DIPE), ethyl tert butyl ether (ETBE) and tert <br /> amyl methyl ether(TAME), and methyl tertiary butyl ether(MTBE) by EPA Method 8260 <br /> Modified <br /> 3 1 2 Ground Water Sample Collection <br /> IGrab ground water samples were collected from probe bonngs B-1 through B-4 using a temporary <br /> PVC screen The probe rods were advanced to a depth approximately four feet below the water table <br /> Advanced GeoEnvironmental,Iric <br /> I <br />