Laserfiche WebLink
I I[Lmrin, IILILn t 17 iriill SLct,nd(}uarscr 1999 (IruundµdtLr Monitoring <br /> Augii%l 2019(N <br /> Ptge K <br /> TABUN. 5 <br /> Lahorator} Anal)'ttcal Results of Surface Water Samples <br /> Sample 11) Anal)tcs <br /> B F1 N I PH-(j (rasoln)e Oxgenates/Addltl%(-, <br /> DDN ND ND ti 4 (MIKE) <br /> DDS NI) ND 18 (MTBE } <br /> ID('I NU ND ND <br /> IDC W ND ND 14 (MTBE) <br />' All tonWitrtttow, trL in µg I L%LLpt I PIi-(, N%hich v, to mg I <br /> M) \ hL.n/LTIL Iolucm LihN I bin/L,nL ind totaW ILn(,-, <br /> I PPI (I total pLtni[r_um htidroLarhonti Lill intifu,d is g tsoltnL. <br /> V) not dLt�LtLd aI or iho%L 1 thoralorN rLpom-d doLLtlon Ltnit <br /> (�atioIinL (i��gLnateti/Addtti�L4=mLthyltcrtiar) hul)[ LthL,r(MIIiI ) oltannl tertiary-hutanol <br /> di-i,,oprop)1 01)Lr(I)I I'F) L.th)I tc.rtt,sn-hutN 1 LIIu r(t 191 ) and tLxttary ami I mL tht l cthcr(I AMI ► <br />' 5. SUMMARYWONCLUSIONS <br /> On June 30, 1999, ( ondor conducted quarterly groundwater and surface water monitoring at Berman & Helen's <br /> Marina located at VLn1LL Island Perry in Stockton California Laboratory analytical results of the groundwater <br /> samples collected during the WL()nd quarter, 1999, monitoring Lvent NLrL generally conststLnt Nith historical <br /> quarterly groundwatLr analytical data <br /> GroundNater elevation measurements collected at the site on June. 30, 1999, Indicated that the aNLrage depth to <br /> groundwatLr Aas 1pproaiinately 6 2 FCLt bLkiw ihL monitor well and surface water station measuring points <br />' This average dLpth to watLr is 0 7 feet greattr than InLasured on March 26, 1998 Groundwater elevation <br /> contours for June. 30, 1999, Indicated that the groundwater gradiLnt at the sett is generally consistent with the <br /> historical groundwatLr gradient <br /> Laboratory analytical rLsnit5 of the surface water samples collected during the second quarter, 1999, monitoring <br /> event were gLnerally consistent with historical surface water analytical data MTBE was detected for the second <br /> time in the sample collected from ID('W (1 4 pg/I) During the first quartLr, 1999, monitoring e%ent, MTBE was <br /> detected in samplLs DDN and DDS at significantly higher concentrations than in previous monitoring events <br /> (980 and 3,500 pg/l, respLctively) During the current monitoring event, however, MTI3L was detected in <br /> samples from DDN and DDS at much lower concLntrations (5 4 and 1 8 pg/l, respectively), similar to results for <br /> these sample~ in the monitoring events prior to the first quarter, 1999, monitoring event <br /> As previously menttonLd in SLctlon 2 , Mr Ronald Rowe of the PIIS/EHD has requested that nine soil borings be <br /> installed to further evaluate the eastern extent of groundwater contamination at the site The installation and <br /> sampling of the soil borings is pending receipt of site access authorization from off-site property owners <br /> W CONDOR <br />