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.. JUN 22 '98 17:44 DELTA SIGNS & CRANES P.2/33'
<br /> �4LE1N �LDER
<br /> •gonsdU0-- s,tolu=e, ctiiylban ene, xylene�F,and metbyl tert-butyl ether(MTBE)were dehi ` :*L
<br /> the soil frorn Oir excavation:- 1—1 U, . iylbenzene, and.xylcnes.'were#tected g �,le
<br /> apparently Collected :iw_ the north= pdrdon of the excavation at a depth of i 11- tat
<br /> .'r;Oncentmtioni- of 5000 ni= _�, :600 u g and 3200 pglkg, r�esppcovely. Only � E'v��s ;
<br /> • detected in a soil•sample collected from the southern part of'the excavation,at.a depth.: I.; � 'at
<br /> 21: µ .: H-D, ethyJbe sxe..xylet ;'toluer►e, and MTBE mere:reported #kern
<br /> 1 ' SQiI s'ainple at O ingllcg,26'Mg/kg;$. i lkg, 8.G�and-140 pgllcg,=Pecti�e9y#
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<br /> ' -The San Joaquin County,Public .Health !Semcas Deparkr Ent, EnvirorunmW Heal t D M,�M 'n
<br /> (PHS/EHDated:
<br /> ),,sent a,letter d '.ebr"ry 5, 1 M,as official,notice of responsibility d'
<br /> y
<br /> '-workplan,J6 "inyostigato the vertical c`�]C1 late al`±ex�tont bf Cont-ninat(?n" at tl6 si ! `3
<br /> proposal {le*s the cert estimate and contract) addressee those-concerns'and tray:bs, �d•Ito
<br /> i P S)EHD as said workplan:
<br /> PRUXO9BD SERVICES
<br /> 1 'teslt,EQ1•-F!ermitting and.Pre-Field AaytN ities
<br /> Tt'hasi been Kleinielder's experi�.nce that,this,proposal contains sufficient detail and'i�fo'
<br /> :.tip:be sl bmitteo to the PHS/EHD.as a workplan,to:review' and approve'a bor al�.fw�I1
<br /> I leirffeldcr c rtri prep>tre isboiingfwell perhiit applic aor4 a proposed boring/well larWio�l
<br /> a
<br /> eine ah�a,t_th.=d':safety plan forr-submittalialong with this proposal to PHS/EIM . A`. 'ti ' ' ll�y,
<br /> ' the permits muA be ap roved=prior fo drilling the borings, Foliowv pg. obtaining am
<br /> y
<br /> tlae PHSIVERD aird Delta Si rr'& Chane,$mice, Kleinfeldier will�¢�otnlne ad with tl�e 1im
<br /> T-4sk-E02:-Drilling of Four Soil Boring
<br /> .i '•
<br /> j . .�
<br /> i Poor:(4) soil.boCinps will be adyanced't i A.maxirnurn depth of a proxi;m4tely, 50:ifeet
<br /> surface..grade (bsg). Thier of the four I nnigs will ba advanced:along:tWpefi e
<br /> fo�mer ek"Yation,one,boring'will be adv�an"d through tl7e-apprdxxmate-center of�)
<br /> I t�ring the advancement'of'the b6nngs,'spil samples dill b4 collie 0 at:fire-foot-i. rIN:f,�r
<br /> li hoiogic plp5ificafion and,quaika ive field 3"gezt,iz1g,with an organic vapor atzal {. V :
<br /> Tete OVA rnea.4req'ianirable c;ornpounds 'in air in puts per million :by, vol ttmt#
<br /> T,, thologic classificatian_will bei based ou the Unified Soil-CTassif e.1don System (U CS d'a -
<br /> sa ng}es:will ;also bd obtained in the-vaclose zone for potential quMfilati�ve cl>
<br /> Currently„ba*sed.on our-expeneace; we anticipate growndwatier in ih'e vicinity ofthe. j t M
<br /> W+.be pmwnt at,a depth of approximately 15 fret bsg. In the-ipvent that two gonsecuti re 1 :3.
<br /> 4a0:boring,below a.depth.of M feet have no field evidence-of gas or dies6,Adrr f
<br /> s1}id bzrring wC►�ii# cease: `G ierefore, we propose to analyzrr'a maxisri •�:1 fs soil I . 2 .
<br /> = E *nples.l�ozn Ail; vadose zoneAn the bottom of each boring, and l. .sArnple evc6 15 feet e
<br /> the bottom two samples). .
<br /> t
<br /> : 2V- P8,12412.1 IW141.
<br /> - '. Q';j+3�3,.1Ckint'rsldcr,:lnc. . I J 1
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