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• 30 June 1999- <br /> AGE-NC <br /> 999AGE-NC Project No 99-0624 <br /> Page 7 of 10 <br /> Registered Geologist Procedures for the advancement of soil probe borings, soil sampling, ground <br /> water sampling, monitoring well installation and development, equipment decontamination, and <br /> sample shipment are outlined below <br /> i <br /> 4 <br /> 41 PROBE BORING ADVANCEMENT <br /> Probe borings will be advanced using AGE's van-mounted Geoprobe 5400 direct-push probing unit <br /> equipped with 1 25-inch probing rods The Geoprobe advances soil probe borings using a hydraulic <br /> or pneumatic hammer to drive soil and ground water sampling tools to specified depths <br /> 42 SOIL SAMPLING PROCEDURES <br /> Soil samples will be collected using Geoprobe push-driven 2-inch diameter discrete and/or <br /> continuous core samplers fitted with four six-inch long brass sleeves or a four-foot long Teflon <br /> sleeve,respectively Upon removal from the sampler,the sample sleeve is separated with a clean soil <br /> • knife The exposed ends of the sleeve will be covered with Teflon sheets, capped and sealed with <br /> tape Soils encountered in the borings will be visually classified by an AGE geologist in accordance <br /> with the Unified Soil Classification System(USCS) Additionally, soil samples will be field screened <br /> for the presence of volatile organic compounds using an OVM <br /> Following sample collection, each preserved sample sleeve will be labeled with the boring location, <br /> depth, time, date and sampler's initials Appropriately sealed and labeled samples will be placed in <br /> a chilled container under ice and transported under chain-of-custody procedure to a DHS-certified <br /> laboratory <br /> 43 IN-SITU GROUND WATER SAMPLING PROCEDURES <br /> For the collection of depth-discrete ground water samples, soil probe borings will be advanced to <br /> the top of the ground water table as identified by collection of a saturated soil sample Once ground <br /> water,has been encountered, a Geoprobe'push-driven water sampling device will be advanced two <br /> to three feet into the water-bearing zone Depth-discrete ground water Samples will be collected <br /> using a Geoprobe water sampling assembly fitted with a pre-cleaned one-inch 0 01 slotted temporary <br /> well screen Each ground water sample will be extracted by lowering a polyethylene bailer through <br /> the hollow center of the push rods into the screen section Samples for BTEX, TPH-g, HVOCs and <br /> fuel oxygenate analyses will be collected into laboratory-supplied, 40-m1 VOA vials containing <br /> 0 5-ml of hydrochloric acid as sample preservative The labeled sample containers will be placed in <br /> a chilled'container under ice and transported under chain-of-custody to a DHS-certified laboratory <br /> Adi-anced Geo£n1 ironmental,Inc <br />