ARCHIVED REPORTS XR0006989 - Laserfiche WebLink

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I it I I \ LL n,tltuLnt, v erL I.IIsLd for this• ,alii lle RLlativLk IONN LOHLLntrations of ben/COL Lthvf l hLI1JLl€� total ��1Lnes alld I1'1-{-(1 were. detcctcd In the gloundwatel trample Lollectcd from MW- 1 I OILILIIL wa, not detLLtLd at oI abo�L a 1usLd laboratolr deteLtlon limit In the proundwattr ,,IInp1L Lc,IILLtLd Isom this well f looting product 01 shCeIIS wete not obsLIWd In thL -,roundwatcl purged from the monitoi wells Petroleum IiNdrMarbon Odors were not deteL.tL.d In WL 1-1I nund Aater ,amplLS c€,IILLtcd tronl thL four monitor wLlls I ihoi ator-v anal',t]Lai ILsults of thL grOtlndwdel samples L OIILLted dLiring the third quartet 1Q99 1uol11tn1InW) DLit wL.re generals} consistent with historiLai quarterly groundwater analytiLal data ( nnLultratlons of M l 131- dLteLted In thL tramples LollectLd Tram MW-2 and NIW-3 tncrLa,ed sl',nlflLantI� with ILSpeLt to thL second quarter 1998 laboratory analyt[Lal results I hL LonLL11tlatlon of M I BE reported for the samp]L LOIIeLted from MW-3 on SeptLn-]bLr 30 11)98 was a histol IL-11 111J1 101 this Lnnstltucnt In ,amplcs LOIIeLted from this well (rioundwatLI LIL�atu,n mLaSurLIuLnts LoIICLtLd at the site monitor wells on SLptember 30' 1998 LndILatLd that 111L axeragL dLpth m IrothL around rnd surtaCL to groundwater was approximatLly 5 6 ILLI HIL a�Lra��L depth to water at thL sttL InLrLasLd by approximately one-halt toot between J1IIlL -16 1098 and September 30 1998 (,roundwater elevation contours estimated using the Aptll-to-water measurements collected on September 30 1998 Indicated that groundwater gradient at thL site was generally consistent with the estimated gradient on SLptember 18 1997 DLCLmbt_i 3 1 1997 March 27 1998 and June 26, 1998 ()n ()LtobLr 1 1998 a ( ondor rLprLsLntatl%,e was on SILL to Londuct quarterly surlaLc water 1,,Imph11'j aLtl%ItILs and LnIIL,Lt a sample of thL Irlarma s pIL-treatLd and treated drinking water tlotli thL faLlhty , water treatment systLrll I aboratory analyses of t11L stirtacL water samples IndILatLd that a low LonLLnlratlon of (oluLIIL was detected In the upstream surface watLr sample (DDN) L01ILLtLd from tIlL drasnagC ditch IoLated east of thL SAL NOVIL of thL othLr 13 1 FX ' LOIlstitLIL:Ilts ill 1111 [-(, we:rL doLLted at or abovL the laboratory reported detection limits in this ,ample 131 1.X and 1 PI 1-6 wLre not deteLted In any of thL threL rLmaining surface water samples MI 131 was deteLted at or above the laboratory ieported detection limit ill all of the surface water Samples except the sample collected from the vicinity of the pump house in the ' Island drainage channel (IDC W) None of the remaining selected gasoline oxygenates/additives weIL daected at oI above the laboratory reported detection limits in any of the surface water samples ' M I RI (20 µg 1) was the only analyte detected at or above the laboratory reported detection limits in the manna , pre-treated drinking water Only chloroform, brom odic h lorom ethane and ' dlblolnoLIloromethane were detected in the marina's treated drinking water at or above the laboratory reported detection himits (at Loncentrations of 18, 6 1 and 3 0 ltg/l, respeLtivcly) ( liloroform brolnodichloromethane and dibromochloromethane appear to be byproducts of the ' marina s drinking water treatment system On DecLmber 30, 1998, Condor conducted quarterly groundwater and surface water monitoring ' at Heiman & I Ielen s ;Marina located at Venice Island Ferry in Stockton California laboratory analytical results Indicated that the gasoline oxygenate MT BE was detected in samples collected ilom monitor wells VIW-I MW-2, MW-3 and MW-4 at wriccintratlons of 1 3 4g/l I 1 000 Itg/1 3 500 µLM and 1 5 lag/l Iespectively Tertiary-butanol was detected in the groundwater samples LolleLted horn monitor wells MW-2 and MW-3 at LonLentrations of 150 sign and 130 [i 1. ILspLLtIVLly [ AM1- was detected in the groundwater samples collected from monitor wells MW-2 and MW-3 at concentrations of 37 tai'/1 and 8 3 µg/1 respectively None of the Other 1