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19 July 2000 <br /> AGE-NC Project No 96-0232 <br /> Page 21 of 29 <br /> ice in a chilled container and were transported under chain-of-custody to McCampbell Analytical <br /> Inc Laboratory, a DHS-certified laboratory <br /> 8 4 IN-SITU GROUND WATER SAMPLING PROCEDURES <br /> For the collection of depth-discrete ground water samples, soil probe borings were advanced to the <br /> top of the ground water table as identified by collection of a saturated soil sample Once ground <br /> water was encountered, or at total depth for the boring, a Geoprobe push-driven water sampling <br /> device was advanced two to three feet Into the water-bearing zone Depth-discrete ground water <br /> samples were collected using a Geoprobe water sampling assembly fitted with a pre-cleaned one- <br /> Inch 0 01 slotted temporary well screen Each ground water sample was extracted by lowering a <br /> polyethylene hose equipped with a ball-valve water sampling tip through the hollow center of the <br /> push rods Into the screen section Samples for TPH-g, TPH-d, BTEX, and fuel oxygenate analyses <br /> were collected Into laboratory-supplied, 40-m1 VOA vials containing 0 5-ml hydrochloric acid as a <br /> sample preservative The labeled sample containers were placed under Ice In a chilled container and <br /> transported under chain-of-custody to McCampbell Analytical Inc Laboratory, a DHS-certified <br /> laboratory <br />. 8 5 EQUIPMENT DECONTAMINATION <br /> All sampling tools used for sample collection were thoroughly washed with a solution of Alconox <br /> and rinsed with clean water prior to use at each sampling location All probing rods were cleaned <br /> prior to advancement at each probe boring location <br /> 8 6 BORING ABANDONMENT <br /> All soil probe borings were permanently sealed to prevent vertical migration of potential <br /> contaminants Soil borings were abandoned by backfilling with cement slurry from the total depth <br /> to above surface grade <br /> 87 LABORATORY RESULTS OF SOIL SAMPLES <br /> TPH-g, TPH-d, and BTEX compounds were not detected above the laboratory reporting limits for <br /> soil samples P18 through P24 MTBE was detected by EPA Method 8020 In soil sample P22-15' at <br /> • a concentration of 0 63 mg/kg <br /> Adianced CeoEn%ironmenlal,Inc <br />