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AdvancedGeo <br />Environmental <br />AGE Standard Operating i ocedures <br />Geoprobe Soil Borings <br />Page 3 of 6 <br />Soil Sampling <br />Soil samples will be collected at discreet five-foot intervals beginning at five feet bsg using <br />a 1.45 inch Geoprobe soil sampling assembly loaded with a two-foot acetate liner. Upon <br />sample retrieval, a selected portion of the liner will be cut and covered with Teflon sheets, <br />capped and sealed with tape. <br />Appropriately sealed and labeled samples will be placed in a chilled container under ice <br />and transported under chain-of-custody procedure to a CDPH-certified laboratory. <br />Samples will be analyzed for the constituents listed or others required. Each sample will <br />be labeled with boring designation, depth, time, date and sampler's initials. Soils <br />encountered in the borings will be visually classified by AGE personnel in accordance <br />with the Unified Soil Classification System (USCS). Additionally, soil samples will be field- <br />screened for presence of volatile organic compounds using an organic vapor meter <br />(OVM), equipped with photo-ionization detector (P ID) pre-calibrated to isobutylene. <br />Grab Groundwater Sampling <br />Grab groundwater samples shall be collected utilizing the following procedures boring to <br />assess the potential of petroleum hydrocarbon-impacted groundwater. For collection of <br />grab groundwater samples, soil borings will be advanced to the top of the groundwater <br />table as identified by collection of a saturated soil sample. Once groundwater has been <br />encountered, a Geoprobe (or similar) push-driven water sampling device will be advanced <br />four feet into the water-bearing zone. Grab groundwater samples will be collected using <br />a Geoprobe water sampling assembly fitted with a pre-cleaned, one-inch diameter 0.01- <br />slotted temporary well screen. Each groundwater sample will be extracted by dedicated <br />disposable polyethylene tubing through the hollow center of the push rods into the screen <br />section. Samples will be analyzed for the constituents listed will be collected into <br />laboratory-supplied, non-preserved 40-ml Volatile Organic Analysis (VOA) vials or other <br />containers as required by the analytical. <br />For the deep soil boring advanced or any deep boring proposed, a grab groundwater <br />sample will be collected at the top of the groundwater table and then again at the total <br />depth of the boring. <br />Appropriately sealed and labeled samples will be placed in a chilled container under ice <br />and transported under chain-of-custody procedure to a CDPH-certified laboratory. Each <br />sample container will be labeled with sample designation, time, date and sampler's <br />initials.