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FIFLY)PROCFWURFS ' 1 This section describes field procedures used by Delta personnel in the performance of the tasks involved with ., this project. • 1.0 SOIL.PORING ANA SOIL,fiAMP1.1NrPROTOCOL prior to the commencement of work on site,Delta researched the location of all underground utilities with the assistance of Underground Service Alert(USA). USA contacted the owners of the various utilities in the vicinity of the site to have the utility owners mark the location of their underground utilities. Work associated with the boring anu monitoring well installation was preceded by hand angering to a depth of i 5 feet to avoid contact with underground fuel distribution lines and unmarked utilities. 3. Drilling and soil sampling were performed under the direction of a Delta geologist. The geologist logged each boring by visual examination of the soil samples and soil cuttings. Soils were classified according to the Unified Soil Classification System(USCS). The soil boring fogs indicate the depth of the various strata �i and other pertinent information. r i rill rig using hallow-stem auger. To reduce the chances Soil borings were advanced by a truck-mounted d of cross-contamination between boreholes,all downhole drilling equipment was steamed-cleaned between t' each boring. To reduce cross-contamination between srr samples.the split-bael sampler was washed in a soap solution and double-rinsed between each sampling event. Soil sampling was performed in accordance with ASTM 1586,33. Using this procedure a 2-inch inside- diameter,California-type sampi"lined with three 6-inch long brass tubes.was driven into the soil by a 140- pound weight falling 30 inches. The number of blows required to drive the sampler 18 inches was recorded on the soil boring logs. Upon recovery,a portion of the soil sample was placed into a soil sample collection jar and sealed for later screening with a photoionization detector(FFD). Another portion of the soil sample r was used for classification and description. The soil sample collected in the leading brass tube within the California•type sampler was capped, packaged, and preserved according to accepted Environmental r 'Protection Agency(EPA) procedures for passible laboratory analysis. The portion of the soil sample retained for organic vapor screening was placed into a clean standard sail 3.� sample collection jar. Ench jar was filled npproximately one-half full,then the mouth of the Jnr was colered M with aluminum foil and capped with n lid. Jars were placed out of direct sunlight for at Iettst 20 minutes, allowing time for the air in headspace and soil to equilibrate. The prose of the PID was inserted through- - the aluminum fail,and the highest observcd rending recorded on the soil boring log: t l i <tM