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<br /> TL,
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<br /> IN
<br /> Report De
<br /> N
<br /> 4; DUBOIS CLEANERS X
<br />_., V t'S _� n 4., �'i _ , '.! i �y "
<br /> ' 348.West`Hikrding,Way t it rl
<br /> Stockton,
<br /> rhia-
<br /> , Cal46
<br /> ,JIT
<br /> m
<br /> INTRODUCTION SCOPE OF
<br /> It J.I
<br /> In accordance'with.-.the'request'd Mr Peter`Wallace, Or'opei(yo*ner Advahced GeoEnvird' ental;;'.,
<br /> nc.;.(AGE) lies prep ' d.
<br /> are this,'O�i� tl�..K6pcit.tdetailirig*:fi-eld'a�tivities;&t-,,3,48Wbst-H�fdi'ng",,'Wa" ".1"
<br /> 'ithe site). The-scope'bf�wik v�a§;tio'hionitof curr&Wgt6und'water doniditions
<br /> Ways;'
<br /> Stockton;S
<br /> .:,,qVthe"site:Siiehistory dfid'A escn t
<br /> ion of,previous work perf1brnied'at the-site,were 66!c1mente
<br /> inlyRq�ort rVprepare ,bi Site Icatibh ad-sUroundingsre.
<br /> L
<br /> lius,tialed.in-Figure,:lLocq`ti6n Map Stiuctuies and riiorutoring'well 166ti6ns are show,` n in rigure
<br /> S la
<br /> 1'Field,activities k.tlie-sit6,wer6 performed'in accordance with kiiidOine§T`or in'v' estigation'of iindei.
<br /> ground'stora.ge:tank (UST) sites established-byjfie San,Jo, aclifin Counity'Plublic flealth,Service§
<br /> Environmental Health-Division-(PHS:;EHD) and-the Gen'te'af-Valley Regional-Wat'e'rQu_ I
<br /> a ify.Controlc
<br /> "Bodrd (CVRWQCB).,_--
<br /> 7
<br /> 2
<br /> PROCEDURES
<br /> MONITORING YELL' PURGE PROCEDURES
<br /> On.17:Dec
<br /> ember 1996 a 8olinst water levelmeter was-used to the
<br /> depth to groundwater
<br /> in each well relativeio the,tops`of thd,well casings:The r"e'lativd gr6uncl:t,�afierelevatiqn ii!each:well
<br /> .,. 41"
<br /> and Hydraulicgradient were'determined froffi•these data(Table 1).
<br /> After ground water:dept were measured_ a pre-ch-an ed',,two-stage_subnersi le
<br /> pump was used to
<br /> MW-4 and -MW-5.-,ApprokiiiiMe gallons of Wat6r-
<br /> y40 gdllo '- --
<br /> purge wells MW-1,• MW-2;'.MW-3R, n
<br /> I:!, (rhinimU' in'6f ihree well voluhies) were-removed' f6rn.edch "well,-Xemperaiut "d"
<br /> eipH an conductivit'Y'
<br /> were measure
<br /> er aqalyzerjhegei rfionitoring','pp�" am'eters,.
<br /> measured -1-gall6n interval&,uii�g ai�,ic M',�,ai'
<br /> j�
<br /> stabilized dun"n' g,purging! Nrgedw?iterwas'stored in,55-gallon:IJOTdrums"n'
<br /> -site-'Monitoring well
<br /> ;
<br /> stabilization-data and'ifield data sheets are includ
<br /> ed ''A ,'.
<br /> in, ppendix A
<br /> 22 'COLLECTION OF--GROUND,WATER-SAMPLES%
<br /> '.Ground water samples,were.collected4 from each well using.
<br /> new 'IrnmediAtely,
<br /> d'into 40-ffil,EPA-apl5royk VOA,via]s`c6ntaifiing'0.5 ml,
<br /> .,pop re -the'samples,N�,er&transferre
<br /> trie�al.
<br /> sarriples"iwr
<br /> of'.18%hydroc
<br /> hlorid'
<br /> ikid as.a s4qipley' resekvative,aiid wore'1666'd A ieif sp- rte
<br /> -� L,4 I . . Pacheco,
<br /> in container iifider chain-of-cus't6dy-t67McQ*4bel :AnA yti6al. ne.-, MAI) in
<br /> t
<br />.'}, 4 -' t4 5- ! 7,- i r y ' 4 t-F 't
<br /> Oil,
<br /> 74'
<br />
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