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FXPLI NATION OF AB1SRM,, ATTQN- <br /> "Classification" Symbols representing soil classification from interpretation of field logs <br /> and Geld tests according to the Unified Soil Classification System. <br /> "Sample Symbol" LRS-Iarge ring sampler. A sampler having an 18 inch long,2.5 inch <br /> inner diameter split barrel that contains the brass sleeves for co:lecting <br /> soil samp:ts. <br /> "BlowslFt.' The number of blows of a 140 pound hammer falling 30 inches required <br /> to drive an 18 inch sampler the finai 12 inches. <br /> "Field Measurement' Concentrations of gasoline constituents detected in the field from <br /> samples collected during drilling operations using an OVM Model 58C13 <br /> photoionization detector (PID). The PIT] is capable of detecting <br /> concentrations as low as 0.1 parts per million. <br />