Laserfiche WebLink
' 24 March 2004 <br /> • AGE-NC Project No 97-0301 <br /> Page 3 of 7 <br /> tape Each preserved sample was labeled with monitoring well designation, depth, time, date and <br /> ' sampler's initials <br /> I ' 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 for analysis <br /> for <br /> ' • Total petroleum hydrocarbons quantified as gasoline,diesel,kerosene and motor oil(TPH-g, <br /> TPH-d, TPH-k and TPH-mo, respectively)by EPA Methods 5030/3550/8015M, <br /> ' • Benzene, toluene, ethylbenzene and xylene (BTEX), ethylene dibromide (EDB), 1,2- <br /> dichloroethane(1,2-DCA),tertiary butanol(TBA),di-isopropyl ether(DIPE),ethyl tert butyl <br /> ether(ETRE),tert amyl methyl ether(TAME),methyl tertiary butyl.ether(MTBE),methanol <br /> and ethanol by EPA Method 8260 Modified, and <br /> • Total lead by EPA Method 6010B <br /> 1 <br /> t • 22 SAMPLE LOGGING <br /> Duplicate soil samples collected from MW-8,MW-9,MW-10 and MW-12 were visually described <br /> ' on boring logs in accordance with the Unified Soil Classification System(USCS) Boring logs from <br /> MW-8 through MW-12 are included as Appendix B General lithology beneath the site is depicted <br /> in geologic cross sectional views D-D'and F-F'on Figures 3 and 4, respectively l <br /> 2 3 EQUIPMENT DECONTAMINATION <br /> ' The hollow stem augers were steam cleaned prior to each bore hole advancement The split-spoon <br /> g <br /> sampler and brass sleeves used for sample collection were pre-washed with a solution of Alconox, <br /> and were rinsed with clean tap water prior to each sampling sequence Rinseate generated from <br /> decontaminating the equipment was placed in properly labeled Department of Transportation(DOT)- <br /> approved model 17H 55-gallon drums and was stored on-site in an area lacking public access <br /> 1 <br /> 2 4 MONITORING WELL COMPLETION <br /> Soil borings MW-8 through MW-12 were completed as ground water monitoring wells utilizing <br /> ' 1 7-inch diameter continuous multi-channel (CMT) or mute-level polyethylene well casing The <br /> Inside of the multi-level well casing consisted of seven %-inch diameter teflon chambers AGE <br /> generally utilized four of the seven multi-level chambers and installed screen Intervals at depths <br /> ' Advanced GeoEnviron mental,Inc <br /> I <br />