ARCHIVED REPORTS_XR0012092 - Laserfiche WebLink

Home Browse Search

I • 25 February 2004 AGE-NC Project No 95-0130 ' Page 2 of 7 Installation procedures for the site were outlined in Interim Remediation Work Plan - May 2003, Idated 21 May 2003, prepared by AGE and approved by the San Joaquin County Environmental Health Department by letter dated 10 June 2003 21 SOIL SAMPLING Discrete soil samples were collected at 5-foot Intervals beginning at 15 feet bsg from MW-8 and EW-1 and beginning at 5 feet bsg from EW-2 Soil samples were collected utilizing a California ' modified split-spoon sampler loaded with 2-inch by 6-inch brass sleeves The sampler was driven by dropping a 140-pound weight from a height of 30 inches The number of blows required to drive each 6-inch length of the sampler (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 • Each preserved sample was logged on a chain-of-custody form, placed in a chilled container and ' transported to a California Department of Health Services (DHS)-certified laboratory for analysis ' in accordance with • EPA Method 5 030/8015M for total petroleum hydrocarbons quantified as gasoline(TPH-g), ' • EPA Method 8020 for volatile aromatic compounds benzene, toluene, ethylbenzene and xylene (BTEX), and r • EPA Method 5030/8260 for 1,2-dichloroethane (1,2-DCA), ethylene dibromide (EDB), tertiary butanol (TBA), di-isopropyl ether (DIPE), ethyl tert butyl ether (ETBE), tert amyl methyl ether (TAME), and methyl tert-butyl ether (MTBE) ' The results of the soil analyses are contained in Table 1 ' 2 2 EQUIPMENT DECONTAMINATION The hollow stem augers were steam cleaned prior to bore hole advancement Sampling tools and ' brass sleeves used for sample collection were thoroughly washed with a solution of Alconox, and were thoroughly rinsed with clean tap water prior to each sampling run At the conclusion of field activities,all rinseate generated from decontaminating the equipment was placed in properly labeled Department of Transportation(DOT)-approved model 171-1 55-gallon drums and was stored on-site in an area lacking public access rAdvanced GeoEnvironmental,Inc r