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' 05 March 2002 AGE-NC Project No 98-0426 Page 2 of 6 140-pound weight from a height of 30 inches The number of blows required to drive each 6-1nch ' interval (blow counts) was recorded on boring logs by an AGE staff geologist Soil samples were preserved by covering both ends of the second brass sleeve with Teflon sheets, ' capping and sealing with tape Each preserved sample sleeve was labeled with soil boring location, depth,time, date and sampler's initials and was stored In a chilled container under ice Selected soil ' samples were logged on a chain-of-custody form, transported to a State of California Department of Health Services (DHS)-certified laboratory, and were analyzed for ' Total petroleum hydrocarbons quantified as gasoline (TPH-g) in accordance with EPA Methods 5030/8015-modified, • Benzene,toluene,ethylbenzene and xylenes(BTEX)and methyl tertiary-butyl ether(MTBE) } ' in accordance with EPA Method 8020, and • Fuel oxygenates - MTBE, di-Isopropyl ether (DIPE), ethyl tertiary-butyl ether (ETBE), a tertiary-amyl methyl ether (TAME), and tertiary butanol (TBA) In accordance with EPA Method 8260 Modified �� - 212 Logging ' During soil-boring activities, sample duplicates were monitored for the presence of organic vapor (OV) using an organic vapor meter equipped with a photo-Ionization detector (PID Thermo Environmental 580A, 10 0 eV,calibrated to isobutylene)and were visually described on boring logs ' In accordance with the Unified Soil Classification System (USCS) Boring logs are Included In Appendix A ' 2 13 Monitoring Well Installation The two soil borings were completed as ground water monitoring wells utilizing 2-inch diameter, schedule 40,blank polyvinyl chloride(PVC)casing and 2-inch diameter screened PVC casing with 0 020-Inch screen slots ' Each well was completed by placing the PVC well casing assembly throughthe hollow stem of the N augers to the total depth of the boring The augers were incrementally raised as #3 Lonestar sand - ' (filter pack)was slowly poured down the annulus between the well casing and the inner wall of the hollow stem auger The filter pack was placed adjacent to the screened casing from the bottom of ' the boring to a point approximately two feet above the top of the screen Following placement of the filter pack, a surge block was inserted Into the PVC casing and was lowered and raised (surged) repeatedly for approximately 10 minutes The depth to the top of the filter pack was measured and ' Advanced GeoEnvironmental,Inc