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lnnit In thL samplL LolleLted pont this well Floating product oI Jieerv, mere not observed in the groundwater
<br /> runoxed (tom the, monitor NLIIS A slight petroleum hxdmcarhon odor was noted in the proundNatcr santplL
<br /> L011LLtcd fioin MW-2
<br /> I ibordtoiy anal}tical results of the groundwater samples collected during the Second quarter, 1998 monitoring
<br /> LVLrit xxere generalk cowj,,tent Neth historical quarterly groundwatci analytical data Concentrations of M]"BE
<br /> detLLled in the Samples collected from MW-2 and MW-3 on Junc 26 1998 appeared to rL.erse a trend of
<br /> nrLri-asutg concLntiations historiLally dcteLted in samples collected from these wells
<br /> GroundNater Llexatioit mLasurelneijt', collected at the Site monitor wells on Junc 26 1998, indicated that the
<br /> a-vLrat;e depth from thL ground surfaLL to groundwater was approximately 5 feet The average depth to water at
<br /> the, sett. wa, C,,Llltially thL same oil March 27, 1998 and Junc 26, 1998 Groundwater Llevation contours
<br /> e,tnnatLd using the, deptli-to-water measurements collected on Junc 26, 1998 indicated that the groundwater
<br /> gradlcnt at thL ',ItL Nas generally consistent Neth thL Lstnnated gradient on September 18, 1997 ā¯‘eLelllber 31,
<br /> 1997 and M31Lh 27 1998
<br /> On SeptLlrtbLr 30 1998, a (ondor rLprLsentatI%L waS on tilts. to conduct quarterly groundwater monitoring
<br /> activities Laboratory analyses of groundwater samples collected from the site monitor wells indicated that
<br /> BTFX, TPH-G and the. ,LILCted gasolene, oxygenates/additives were not detected at or above the laboratory
<br /> reported detection limits in the sample collected from MW-1 F thanol, tertiary-butanol, DIPF, and LTBE were
<br /> not detected at or above the laboratory reported detLetion limits in any of the groundwater samples Fhe
<br /> laboratory rLportLd dLtLction limits Nero, rated for the groundwater samples LollcctLd from MW-2 and MW-3
<br /> due to rclatINLIN high conLentrations of M FBL in the groundwater sample', collected from those wells (as
<br /> described below) I AMF Nas deICCtLd m thL groundwater samplLs L011cCtLd from MW-2 and MW-3 MIB}
<br /> xvas dLtLLted In the. groundwatLr samplCS collLLtLd from MW-2 MW-3 and MW-4 BenienL, ethyl benzene,
<br /> total xy ILIlL,, and IN I-G wcrL not dt-ILCIed at or above raISLd laboratory reported dctectlon hmrts In thL
<br /> gre7undwattr sample collcctcd Irom MW-2 A ILM CnnLLntration of tolucnL Na,, detected in the groundwater
<br /> I samplL collected from MW-2 13T1 X and I Plf-G NLrL not detLLted at or above the, laboratory reporiLd detection
<br /> limits In IIIc. groundwater sample LollLctLd from MW-3 I hL laboratory detection limits associated with the
<br /> BTFX constituents were raised for this sample Relatively low ConCLntrations of benzene, ethyl benzene, total
<br /> xylenes, and TP1-I41 were detected in the groundwater sample collected from MW-4 I-oluene was not detected
<br /> at or above a raesLd laboratory detLction limit in the groundwater sample collected from this well Floating
<br /> product or sheLnS were not observed in the groundwater purged from the monitor wells Petroleum hydrocarbon
<br /> odors werL not dCICLtc.d in the groundwater sample.', Collected from the four monitor Ne115
<br /> Laboratory analytical rL,ultS of the groundwater Samples collected during, the third quarter, 1998, monitoring
<br /> event "LIC gLnLrally -on,,istwrt with historical quarterly groundwater analytical data Concentrations of MTBE
<br /> dLtected in the sainplL, COIICLtcd from MW-2 and MW-3 Increascd significantly with respect to the second
<br /> quarter 1998 laboratory analytical result% the concentration of MTBC reported for the sample collected from
<br /> MW-3 on September 30, 1998, was a historical high for this constituent in samples collected from this well
<br /> Groundwater elevation measurements collected at thL Site monitor wells on September 30, 1998, indicated that
<br /> the averagL dLpth from the ground surface to groundwater was approximately 5 6 feet The average depth to
<br /> water at the site increased by approximately one-half fool between Junc 26, 1998 and September 30, 1998
<br /> Groundwater elevation contours estimated using the dLpth-to-water measurements collected on September 30,
<br /> 1998, Indicated that groundwater gradient at tht, site was generally consistent with the estimated gradient on
<br /> SeptembLr 18, 1997 DeCLinbc.r 31, 1997, March 27, 1998 and June 26, 1998
<br /> On OLtohe;r 1, 1998 a C ondor representatn L was on site to conduct quarterly surfacL water sampling activities
<br /> and colleLt a samplL of the marina s prL-trLatLd and treated drinking Nater from the facility'', water treatment
<br /> ,y,tLnZ 1 aboiatory analy,L, of the ,uiface Natcr sample% indicated that a low Concentration of tolnLHL was
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