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S E C ® R <br /> _4, <br /> ATTACHMENT A <br /> FIELD AND LABORATORY PROCEDURES <br /> Soil Sampling Beneath Vent Lines <br /> Soil samples were collected by advancing 2-inch-diameter brass sample liners into soil removed from the <br /> excavation by an excavator or backhoe bucket Soil samples for chemical analysis were retained in the <br /> brass liners, labeled, and capped with Teflon sheets and plastic end caps The samples were then sealed <br /> in zip-lock bags, placed on ice, and transported to the laboratory accompanied by the appropriate chain- <br /> of-custody documentation <br /> N <br /> Soil Sampling for Stockpiled Soil <br /> Soil samples were collected by advancing 2-inch diameter brass sample liners into the soil stockpile, after <br /> removing approximately 6 inches to 1 foot of surface material in the sample location Soil samples for <br /> chemical analysis were retained in the brass liners, labeled, and capped with Teflon sheets and plastic <br /> end caps The samples were then sealed in zip-lock bags, placed on ice, and transported to the <br /> laboratory accompanied by the appropriate chain-of-custody documentation <br /> t <br /> Laboratory Analysis of Soil and Stockpile Samples <br /> Soil samples were analyzed for total petroleum hydrocarbons calculated as diesel (TPHd) by EPA Method <br /> 8015 total petroleum hydrocarbons calculated as gasoline (TPHg), benzene, toluene, ethylbenzene, <br /> xylenes, and fuel oxygenates (methyl tert butyl ether [MtBE], ethyl tert butyl ether [EtBE], tert butyl alcohol <br /> [TBA], tert amyl methyl ether [TAME], di-isopropyl ether [DIPE], 1,2-dichloroeathane [1,2-DCA], ethylene <br /> dibromide[EDB], and ethanol) by EPA Method 8260B and total lead by EPA 6010B <br /> t <br /> 0 <br /> C <br /> E <br /> F. <br /> • <br /> i <br /> a <br />