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<br /> 'INTRODUCTION i
<br /> This reportprepared:by Touchstone'Developments (Touchstone} documents the
<br /> 'ru rem6va3 of `gasoline ;and Bused oily''Underground. ;Stofage Tar3ks.. (USTs),,
<br /> s �
<br /> associated -piping,'and"an orl/water separator sump }ln. 'addition, :this-report
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<br /> describes and documen#s-overexcavation�acti►iittes;{ soil saimpling of: the.:new t :j
<br /> f .
<br /> UST excavation and disposal of;soi# generated of the above referenced°.location,
<br /> F . (Figure;1)
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<br /> -Gasoline USTs, and product piping .remodals atfthisrlocation were
<br /> y performed ori' September 27, 1995 . OV.erexca�"at ion?activities and 'oiIMater
<br /> separator removal were performed on October 2-and 4,$;`1995: k g
<br /> a t ry {
<br /> SITE CONDITIONS
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<br /> The service station"site consists of„two 10,000-gallon gasoime.-storage i tanks,' .� �A
<br /> one S,OOO-gallon`- gasol r e-'storage,:�tanl<,::onef-..9;000-,:gaflon--,.used=oil tank;.-two_. , � -Y _•
<br /> d�speriser islands and associated product piping;.yand astation building;housing $ .
<br /> +N= two(:hydraulic hoists and an :. oillwater -separator Groundwater was not -�
<br /> ' r rencountered in any,excavation'at thrs:location' r F
<br /> F•- xj` R r4Af -. e 9'd t
<br /> SERVICE STATION D T S {
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<br /> IEL ACTiVIy
<br /> }. � '3 ,,,r. ; a '.•f >��'`= - r:xT:r� r Se 8`%,,, � S -`.a +��'� ;1 ”4� � "° i S"'} M'" d -, :J
<br /> 'xv - k- . t� ` :.,:moi- •.-yi '� �" --,r.. lF .-;fi .�t'd � pis '. �-.3 ` r c :�
<br /> ". UST and associated"piping removal,;excavation;:and hackfi! was performed byF
<br /> Wendt Construc#ion`r'of Lodi,` Cal ifort is t A',Touchston'e R representative-was on
<br /> ` site to observe the removal/excavation activi#ies,`and ta�colled so%il samples-fr©m
<br /> -.i - t._ .:.A ... a -
<br /> , the;exca�ations and soil.stockpiles Roberk,McClellon:from' San Joaquin County t ,„
<br /> Health Services SJCPHS grid Louie Cheek from the,-Ripon,`Consolidated ' `- °
<br /> l ' . ..,public- (
<br /> Fire Diatrict were present='duririg they UST reamovalAisoJonse were'''Brett
<br /> Hunter. and Rick Garrett of`ChevronU S A Ron=Rowe of$the'SJCPHS..was g
<br /> rt ons,ite on=October 4 1995 to observe-so�l sampling from the�haw-.UST-complex 3 q
<br /> y 5 - Trahsportation w and disposal ::of the ',USTs ., and `associated.. piping.,.was
<br /> accomplishesd'by Erickson, :Inc of Richmond; Calcforn��a +Y.
<br /> t` ti
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<br /> z UST_ Samvlmah r >ti ;• s . :z 7
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<br /> t t Soil samplesFT11 N- 15 O, T1 S 14.0, ,2-N15:D,.and T3'S
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<br /> F 14.5 were collected from' beneath each end;o#ahe.gasoline USTs,
<br /> b at.'approximately 14 'to -16 fee#,below ground'surface bgs)-: At-the request Aof
<br /> Chevron; one,grab-sample (TS-1) was collected:from`backfill material<from.the
<br /> . north end of the excavation to quantify1hydrocarbon concentrat�ons'm soil where
<br /> p � ` gasoline odors=were.noted. The UST excavation measured„.approximately 40 '
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