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10 May 2004 <br /> • AGE-NC Project No 96-0229 <br />' Page 3 of 8 <br />' 21 SOIL SAMPLING <br /> Discrete soil samples were collected at 5-foot Intervals from MW-13 and MW-14 between 70 and <br />' 125 feet bsg, from MW-16 and MW-18 between 15 and 100 feet bsg, from MW-17 between 45 and <br /> 100 feet bsg, and from MW-19 between 60 and 100 feet bsg Due to time constraints and traffic <br /> concerns during construction of off-site multi-level well MW-15, no sampling activities were <br />' performed Soil samples were collected utilizing a California split-spoon sampler loaded with 2-Inch <br /> by 6-inch brass sleeves, the sampler was driven by dropping a 140-pound weight from a height of <br /> 30 Inches The number of blows required to drive each 6-inch length of the sampler(blow counts) <br />' was recorded on boring logs by an AGE staff geologist, boring logs are in Appendix B <br /> Soil samples collected from soil borings MW-13, MW-14 and MW-16 through MW-19 were <br />' preserved by covering both ends of a brass sleeve with Teflon sheets and plastic end caps and sealed <br /> with duct tape Each preserved sample was labeled with monitoring well designation, depth, time, <br />' date and sampler's initials <br /> Each preserved sample was logged on a chain-of-custody form, placed in a chilled container and <br /> I transported to a California Department of Health Services (DHS)-certified laboratory for analysis <br /> for <br /> I • Total petroleum hydrocarbons quantified as gasoline(TPH-g)by EPA Method 5030/8015M, <br /> • Benzene, toluene, ethylbenzene and xylene (BTEX) by EPA Method 8020, <br /> • Ethylene dibromide (EDB), 1,2-dichloroethane (1,2-DCA), tertiary butanol (TBA), di- <br /> isopropyl ether (DIPE), ethyl tert butyl ether (ETBE), tert amyl methyl ether (TAME) and <br /> methyl tertiary butyl ether (MTBE)by EPA Method 5030/8260 Modified, and <br /> • Total lead by EPA Method 6010B <br /> I22 SAMPLE LOGGING <br /> Duplicate soil samples collected from MW-13,MW-14 and MW-16 through MW-19 were visually <br /> described on boring logs in accordance with the Unified Soil Classification System(USCS) Boring <br /> logs from MW-13 through MW-19 are included as Appendix B General lithology beneath the site <br /> is depicted in geologic cross sectional views B-B'and F-F'on Figures 3 and 4, respectively <br /> IAdvanced GeoEnviron mental,Inc <br />