Laserfiche WebLink
r <br /> f F 1 F <br /> S 1 <br /> ' 31 July 2000 <br /> AGE-NC Protect No 95-0142 <br /> Page 2 of 4 <br /> li F + <br /> 22 GROUND WATER SAMPLE COLLECTION <br /> Water samples were collected from each well using new disposable plastic bailers and ti ansferred into <br /> EPA-approved 40-m1 VOA vials containing 0 5 milliliter hydrochloric acid (18%) as a sample <br />' pr eservative The vials wer e then labeled and placed to a chilled container for subsequent transport <br /> under chain-of-custody to McCampbell Analytical,Inc (MAI) Ground water samples were analyzed <br />' for the following <br /> G Total petroleum hydrocarbons quantified as gasoline (TPH-g) in accordance with EPA <br />' Method 8015 Modified, <br /> Volatile aromatic hydt ocarbons benzene,toluene,ethylbenzene and total xylenes (BTE&X)- <br />' in accordance with EPA Method 8020, and <br /> v Oxygenated fuel additives dt isopiopyl ether (DIPS), ethyl tertiary-butyl ether (ETBE), <br /> methyl tertiary-butyl ether(MTBE),tertiary-amyl methyl ether(TAME) and tertiary butanol <br />' (TBA) in accordance with EPA Method 8260 Modified, respectively <br /> 3.0. FINDINGS <br />' 3 1 GROUND WATER GRADIENT AND DIRECTION <br /> Depth to ground water at the site t anged from 24 20 feet to 25 34 feet below the tops of the well <br />' casings The relative ground water elevation (based on an arbitrary benchmark) in the shallow <br /> scr eened wells i anged from 73 70 feet to 75 27 feet The actual ground water elevation at the site in <br /> the deeper screened wells ranged from 12 09 feet to 12 42 below mean sea-level (MSL) The <br />' elevation and gr ound water depth data is depicted in Table 1 <br /> s <br /> During the June 2000 monitor ing event, ground water flow drr ectton in the shallow ground water <br /> ' table was toward the south with an average hydraulic gradient of 0 005 feet/feet, and toward the <br /> southeast in the deeper gi ound water table with an average hydraulic gradient of 0 004 feet/feet The <br /> relative elevation of the ground water sur face at the site is illustrated on Figure 3 and 4 <br /> 11 � <br /> 3 2 ANALYTICAL RESULTS OF GROUND WATER SAMPLES <br /> 1 , <br /> TPH-g was detected to samples collected fiom wells MW-6, VW-1, VW-3 and VW-4 at <br /> concentrations tangrng from 60 micrograms per liter (ug/l) to VW-4 to 140,000 µg11 in VW-1 <br /> Benzene was reported in samples collected from wells MW-6 and VW-1, VW-3, and VW-4 at <br /> 1 � F <br />