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' 11 June 1999 <br /> • AGE-NC Project No. 97-0333 <br /> ' Page 4 of 9 <br /> • EPA Method 8020 for the volatile aromatic compounds benzene,toluene,ethyl benzene and <br /> ' xylenes(BTEX)with methyl-tertiary butyl ether(MTBE), and <br /> • EPA Method 8260 modified for tertiary butanol (TBA),di-isopropyl ether(RIPE), ethyl tert <br /> ' butyl ether (ETBE) and tert amyl methyl ether (TAME), and MTBE <br /> ' 3 12 Ground Water Sample Collection <br /> ' Grab ground water samples were collected from P-1 through P-5 utilizing a hydro-punch technology <br /> A Geoprobe water sampling assembly was advanced to a depth approximately four feet below the <br /> water table utilizing hollow steel rods The hollow steel rods were then retracted upward <br /> ' approximately five feet, thereby exposing a PVC screen to ground water A bailer fitting was then <br /> placed on the end of 3/a-inch diameter polyethylene tubing, inserted through the rod assembly into <br /> the exposed screen, through which water was manually pumped Sufficient sample was collected <br /> ' from bonngs P-1 through P-5 to fill three 40-m1 EPA-approved VOA vials containing 0 5 ml 18% <br /> hydrochloric acid as a preservative and from borings P-2 through P-5 to fill one liter amber bottle <br /> '• Ground water sample containers were labeled with probe boring designation, date, time, and <br /> samplers inttiala <br /> ' Each preserved sample %Nas logged on a chain-of-custody form, placed in a chilled container and <br /> transported to a DHS-certified laboratory, selected samples were analyzed in accordance with <br /> ' • EPA Method 5030/8015M for TPH-g and TPH-d, respectively, <br /> • EPA Method 8020 for BTEX with MTBE, and <br /> ' • EPA Method 8260 modified for TBA DIPE, ETBE, TAME and MTBE <br /> 3 1 3 Equipment Decontamination <br /> ' Prior to sample collection, Geoprobe soil and ground water sampling equipment Nvere thoroughly <br /> rinsed -with cleaneater after «asking with a solution of Alconor Geoprobe rods were thoroughly <br /> cleaned prior to soil probe boring ad,�anccrncnt <br /> i <br /> i <br /> ' 3 : 4 oggtng <br /> Dunn, -irillins pct Witte. ,ampL JL11�11�atl­y «1,rc JtJ(1n1torcd for thL presenLc of organic tiapol_ <br /> ' 4dianced GrAnN ironmtw o Inc <br />