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<br /> SePtember 24, 1991
<br /> Project No. 02320 0075
<br /> Mr. R. R. Zielinski
<br /> Texaco Environmental Services
<br /> 108 Cutting Boulevard
<br /> �r Richmond, CA 94804
<br /> RE. QUArITERLY STATUS FEPORT(R-4.of 97)
<br /> TEXACO SERVICE STATION
<br /> 446 WEST CHARTER WAY
<br /> STOCKTON,CALIFORNIA
<br /> Dear Mr. Zielinskj:
<br /> This lett«r is ;)rusented as a
<br /> for the quarter ending Augusrtedyt
<br /> report an groundwater conditions at the site
<br /> - determine w,.ter 9 vats, i 991. Grounciwatc_ monitorin
<br /> table elevation, the thickness of an g and samplingW eferenced above
<br /> and the djstrrbution of dissolved hydrocarbons in the 1 i ere Conducted to
<br /> Y separate-phase petroleum hydrocarbons !sP),
<br /> water monitoring data and resalts of faborata
<br /> 9• '991, ,:r monitoring wells(MWS)at this site. Ground
<br /> o included, rY analyses of gr`Undtivater samples collected on August
<br /> WORK PERFORMED
<br /> GROUNDWATER MO)VITORING
<br /> W7,tGr table elevations at the Site have decreased an avers
<br /> prrjviaus quarter. The estimated flow direction of gg of 1 23 feet from levels reported the
<br /> 'ommirth,t west and east. Mc]nitoring results are presented in Figure 1
<br /> the groundwater is divergent from
<br /> from the four previous r'r}onitorinl7 events a Pre i MW 2 to the
<br /> (Attachment d)(Attachment t,)and along With data
<br /> GROUNDWATER SAPdPLIIYG
<br /> Prior to water-satnpra collection, the
<br /> v91umes and ailgwed o groundwater monitoring
<br /> Protection A t recharge with representative formation
<br /> were purged of 4-10
<br /> 8ency (EPA)-aPProved Teflon'sampler wafer. casing
<br /> water, was used for the groundwater sem line cleaned with an industrial dt!urge t orad drstiNad
<br /> mii!iriter Blas or
<br /> with Teflon'-se P g• The water sarraf;jes were then transferred to 40-
<br /> Laboratories, Inc, IGTELI,in Ptum caps,preserved on ice,and transported to GTF�Environmental
<br /> Contort+, Caiifornia, at,'co:n
<br /> The water Sam rs Pznred hY a chain-af-custod
<br /> Pl were analyzed using rn Y manifest.
<br /> concentrations of fatal g odified EPA »aethods 5030/80x0/8075
<br /> Petroleum t'ydrocarbons-as-pasohne ITPN.C,), and benzene, rn assure
<br /> . (JfJir,'s llrn,rry!il,rrl llie^I'.,P.,f irrr,r,f r urrd rIi Yrn;tts
<br />
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