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Hann.m&ilden s Manna—Scuand Quarter 1998 Groundwater Monuonng Augutil 11 1998 Page i- 55-gallon drum~ and left on srtc to aN%ait disposal (iround\\.ltcr Monitoring rleld I orms are, included in Appendix C Cfround\Nater samples ucaL LolleLted by filling the samplL contalnLrs directl} from the pump disehargi~ tubing The groundwater was translerred to three 40-milliliter glass voldtilL organic aromatic, (VOA) vials fitted with ' teflon-lined caps (for petroleum hydrocarbon analysts) and to a one-11tcr polyethylene bottle (foi laboratory tested mtrinsEc biorcmediatlon parameters - alkalinity nitrate sulfate, and ferrous iron) rhe. Vials "Lre checked to assure tlidt no air bubbles were present Cath sample container was labeled and placed in a cooler chilled with ' ice and dLli-vered under chain-of-custody procedures to (1coAnalytieal t aboratories, Inc , in Modesto, California within 24 Fours o1 samplL collection l-or quality control Lille, rtnsatc sd177pIL was collceted and labelLd 1432-MW5-6/26/98 rhe. rinsatc sample was collLcted by pumping hydrocarbon-free water through the Grundtos Rcadlflo It submersible pump and into the sampling Lontdlners after the pump was decontaminated After the Ansate sample was collected, the. pump was ' used to sample monitor well MW-1 Results of laboratory analysis are discussed in Section 3 2 and ')cLtion 3 3 3 2 LABORATORY ANALYTICAL METHODOLOGY ' The methods used for laboratory analyses for the June 26, 1998, monitoring event are summarized in fable 1 Table 1 ' Laboratory Methods Analyte(,) 1111 X I('11-6 (,aS01111L ()x)gLnateti/Addit]NL% All,ilinity Nilrale "'ulydt, Ferrous Iron Method 002 ')030/1111 I 8260 3101 300 300 SM-3500-Fe DU I 11111 0 3 µell (Ii i 1 1 0 05 mg/l 1 0 ItPAI 1 10 mg/l 1 0 mg/l i mg,1 0 1 mg/1 06 µg/1 (X) 100ppol {Cert Butanol} 131 F X = ben/LnL toluene ethy l ben/c.ne and luta]Xy Eenc s 1 PN-G =total petroleum hydrocarbons yuantif Ld as gasobne (iasolinL ox)genaes/Additivc.s=Methyl tertiarybutyl ether(M1 BF) ethanol tc,rtiary-butanol,di-isopropyl ether(I)lpr) ethyl tertiar)-butt'I ether(F I BF)and tertiary alnyl methyl ether(1 AMF) 3 3 LABORATORY ANALYTICAL RESULTS BTEX, TPH-G and the selected gasolmL oxygenates/additives were not detected at or above the laboratory reported detection limits in the sample collected from MW-1 or the ansate sample (1432-MW5-6/26198) Ethanol, tertiary-butanol DIPS, and 1�171317, were not detected at or above the laboratory reported detLction limits in any of the groundwater samples Tertiary amyl methyl ether was detected in the groundwater samples collected from monitor wells MW-2 and MW-3 in concentrations of 330 µg/I and 22 µg/1, rLspectively BTEX and I PH-G constituents were not detected at or above raised detection limits in the samples collected from MW- 2 and MW-3 The analytical detection limits associated with BTEX and TPH-G for the samples collected from monitor wells MW-2 and MW-3 were raised, due to relatively high concentrations of MTBE in the samples collected from those wells M 1713E was detected at 3,000 µg/l and 1,800 µg/l in the samples collected from MW- 2 and MW-3, respectively The analytical detection limits associated with BTEX and TPH-G constituents for the sample collected from MW-4 wLre also raised due to the presence of petroleum hydrocarbons in the sample Benzene, ethyl benzene, total xylenes, and M I BF were detected in concentrations of 38 µg/I, 30 µg/t, 42 µg/1, Iand 2 3 µg/l, respectively in the sample collected from MW-4 A concentration of 0 5 mg/1 of I-PII-G was detectLd in the, sample collLOW from MW-4 The laboratory results of the groundwater samples are presented in Table 2, on the next page Historical groundwater monitoring are mclud(,d in Table 4, in Section 3 5 41% A��_ �� CONDOR