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_ 06 December 2000 <br /> AGE-NC Project No, 95-0100 <br /> Page 3 of 6 <br /> i- Soil samples were collected at 5-foot intervals,beginning at a depth of 10 feet bsg to the total depth <br /> _1 of the soil borings. The soil borings were advanced at the site using a van-mounted Geoprobe 5400 <br /> probing unit equipped with 1.25-inch diameter probe rods with a 2.15-inch diameter soil sampling <br /> assembly, pre-loaded with four six-inch by 1.125-inch brass sleeves. After soil samples collection <br /> all soil sleeves were removed from the soil sampler and the ends of the second 6-inch brass soil <br /> sleeve were covered with Teflon sheets, capped and sealed with tape. The sample containers were <br /> G'? labeled with the sample identification(boring location, time and date). The sleeves were placed in <br /> a chilled container. <br /> 2.5. EQUIPMENT DECONTAMINATIONIBORING ABANDONMENT <br /> >= All sampling tools and brass sleeves used for sample collection were thoroughly rinsed with clean <br /> water after washing.with a solution of Alconox. All Geoprobe rods were cleaned prior to <br /> advancement of each probe boring. The soil borings were tremie backfilled with neat portland <br /> cement-. . <br /> !" <br /> == 2.6. SAMPLE ANALYSIS <br /> The soil samples were Iogged on a chain-of-custody form, stored in a chilled container and <br /> r transported under chain-of-custody to McCampbell Analytical Inc..(MAI), a California Department <br /> of Health Services (DHS)-certified laboratory. The soil samples and the grab water sample were <br /> -: analyzed in accordance with: <br /> • EPA Method 8015 Modified for total petroleum hydrocarbons quantified as gasoline <br /> (TPH-g) and <br /> • EPA Method 8020 for volatile aromatics(benzene,toluene, ethylbenzene and xylene(BTEX) <br /> and methyl-tertiary butyl ether (MTBE). <br /> !_rl 2.7. LOGGING <br /> Soil was extruded from a duplicate sample sleeve and screened for the presence of organic vapor <br /> using an organic vapor meter (OVM) equipped with a photo-ionization detector (PID: Thermo <br /> Environmental 580A, 10.0 eV, calibrated to isobutylene), and the readings were recorded on a soil <br /> boring log. The soil was then visually described in accordance with the Unified Soil Classification <br /> System (see Appendix B). <br /> I 'I <br /> Advancer!GeoEnvironmental,Inc. <br />