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� Y1) <br /> 12 March 2003 <br /> AGE-NC Project No 96-0236 <br /> Page 2 of 5 <br /> 2 1 GRAB GROUND WATER SAMPLE COLLECTION <br /> Grab ground water samples were collected from P-36, P-37 and P-38 utilizing hydro-punch <br /> technology A Geoprobe water sampling assembly was advanced to selected depths utilizing hollow <br /> steel rods The hollow steel rods were then retracted upward approximately four f eet, thereby <br /> exposing a PVC screen to ground water A bailer fitting was then placed on the end of-'/8-inch <br /> diameter polyethylene tubing, inserted through the rod assembly into the exposed screen, through <br /> which water was manually pumped Sufficient sample was collected from each hydro-punch to fill <br /> three 40-m1 EPA-approved VOA vials containing 0 5 ml 18% hydrochloric acid as a preservative <br /> and a one 1-liter amber bottle without sample preservative Ground water sample containers were <br /> labeled with probe boring designation, date, time, and samplers initials <br /> Each preserved sample was logged on a chain-of-custody form, placed m a chilled container and <br /> transported to Castle Analytical Laboratory (CAL)and McCampbell Analytical Inc (MAI), both <br /> DHS-certified laboratories, selected samples were analyzed for <br /> • EPA Method 5030/8015M for total petroleum hydrocarbons quantified as gasoline and diesel <br /> (TPH-g and TPH-d, respectively), <br /> o EPA Method 8020 for volatile aromatic compounds (benzene, toluene, ethyl benzene and <br /> xylene BTEX) with methyl-tertiary butyl ether(MTBE), and <br /> • EPA Method 8260 modified for methanol, ethanol, MTBE, tertiary butanol (TBA), <br /> di-isopropyl ether (DIPE), ethyl tent butyl ether (ETBE), tert amyl methyl ether (TAME), <br /> 1,2-dichloroethane (1,2-DCA) and ethylene dibromide (EDB) <br /> Due to a laboratory oversight, grab water samples collected from P-37 were not analyzed for EPA <br /> Method 8260 constituents <br /> 2 2 EQUIPMENT DECONTAMINATION <br /> Pnor to sample collection,Geoprobe groundwater sampling equipment were thoroughly rinsed with <br /> clean water after washing with a solution of Alconox Geoprobe rods were thoroughly cleaned prior <br /> to soil probe boring advancement <br /> Advanced GeoEnvironmental,Inc <br />