Laserfiche WebLink
f <br /> f f <br /> i 1 i 1 <br /> 20 August 2001 <br /> AGE-NC Prdj ect No 99-0520 <br /> Page 2 of 4 <br /> 3 fr <br /> f <br /> Iwater analyzer Morutormg well field logs are included in Appendix A Purge water generated from <br /> the site monitoring wells was contained on-site in appropriately labeled i55-gallon drums <br /> I I 1 Y <br /> 2 2 COLLECTION AND ANALYSIS OF GROUND WATER SAMPLES <br /> IGround water samples were collected from the monitoring wells using disposable polyethylene <br /> Bailers These bailers are disposed of after one use and require no decontaminating,minimizing cross <br /> contamination due to sampling devices Each water sample was transferred into three 40-m1 _ <br /> EPA-approved VOA vials containing 0 5 ml 18%HCI as a sample preservative and into one 1-Inter <br /> amber bottle without preservative f f•After collection, the samples were labeled and placed m a clvlled• <br /> I _ <br /> container for transportation under chain-of-custody to McCampbell Analytical Laboratory(MAI) <br /> in Pacheco, California, a State of California Department of Health Services (DHS) Laboratory Each <br /> sample was analyzed for <br /> I • Volatile aromatic compounds -benzene, toluene, ethylbenzene and total xylenes (BTEX) in ` <br /> accordance with EPA Method 8020, <br /> 0 Total petroleum hydrocarbons quantified as diesel (TPH-d) in accordance with EPA Method <br /> I, <br /> 8015 Modified, ' <br /> c Total petroleum hydrocarbons quantified as gasoline (TPH-g) in accordance with EPA <br /> Method 8015 Modified, <br /> I , . Fuel additives including ch-isopropyl ether(RIPE},ethyl-tertiary-butyl ether( TBE ,methyl- <br /> tertiary-butyl <br /> eth l-tertiary-butyl ether(MTBE),tertiary-amylmethyl_ether(TAME),and tertiary-butanol(TBA), <br /> 1,2-dichloroethane(1,2-DCA)and ethyl dibromide(EDB}/ 1,2'dxbromoethane in accordance <br /> with EPA Method 8260 Modified ' <br /> 4 E j <br /> I <br /> 3.0. FINDINGS . <br /> 4 I I <br /> Groundiwater elevation and flow direction were calculated from field data, the hydrocarbon impact <br /> to ground water was assessed by laboratory analysis' <br /> 3 1 GROUND WATER ELEVATION, FLOW DIRECTION AND-GRADIENT <br /> S I ♦ ry ` <br /> Depth to ground water at the site ranged from 11 89 to 12 60 feet below the well casing tops The <br /> ground water elevations at the site ranged from 86 80 feet to 86 89 feet above mean sea level (msl) <br /> The ground water elevation decreased approximately 0 4 feet since the last monitoring event <br /> I r I <br /> 1 <br /> i I , ♦ 1 <br /> 4 , I <br />