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PUBLIC HEALTH SER'CTICES <br /> SAN JDAQU IN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION ` <br /> i <br /> Karen Furst, M.D., M.P.H., Health Officer <br /> 304 East Weber Avenue, Third Floor • Stockton, CA 96202 <br /> 2091468-3420 <br /> ED RALSTON <br /> TOSCO MARK TING COMPANY <br /> 1280 LEAD HILL ROAD, SUITE 120 <br /> ROSEVILLE CA 95661 <br /> FEB 2 2 2000 <br /> RE UNOCAL STA I ION#I5886 S1 I E CODE 1 176 <br /> 2701 MARCH LANE <br /> STOCKTON CA <br /> San Joaquin Comity Ptiblie HLUlth Rarvrces Fnvironmental Health Division(PIIS I I ID)hat.rtvIL%&W the <br /> CurrcchverectionPlan by Fnvironmental Resolutions InLorporated dated DecembL.r28, 1999 PIIS/1-111) <br /> prnvrdoa the following comments and dirLLtrvc% <br /> AnalytiLnl data trorn the site listed abuvL a,unlirms the presence of pLlrultum hydrocarbons in <br /> groundwater A large mass of MTl3F is present which may endangLr beneficial use groundwatcr Pump <br /> rests from un-srtL cxtracticn wells suggest that partial hydraulic control of MIBL migration may he <br /> teasible Redu(.lion of contaminant mass and ruduLuon of plunie migration tit lhi% site are ci itical <br /> CumprthLn,,ve and frequent assessment of plume dynamics, receptor rnk, and the effects of reinLdiatrun <br /> are Straligly recuatrm ndc.d by PHS/Fllf) <br /> Pyalp wid rrLa( Sy,,tem <br /> PHS'FIIf)hams conditionally approved the start up of the,remediation system uti iltitcd below <br /> IhL prupo%al is considered an mtLrim remedial action, the, dLsrbn proposed th nut to he consldeled a lrnA <br /> remediation strategy Th(- plume is currently undLfined however, ur actord.ance with corrtLllvo actioli <br /> tegltlation uilcrim remedial action can(K Lur cnnt,urretitly with any phase of rorrCLIIVL ac.lion A CorrLetive <br /> AL.tran Pl,in with cleanup ILVLI%complying with CCR, Title 23, Division 3, Chapter 16, SLLhon 2721(b) <br /> 2726 and 2727 will be rLquirLd Following the I11rrpl4mcnLirion of this uilLrun remedial dLlion At this Inn, <br /> nn Llean up goal Is implied of approved A public participation notice will bL pn%ted tit the %itc, by <br /> I'l IS/Ll ID un I-Lbruary 22,2000 <br /> A limited radius of influence Is cxpLLtLd at tate dlschargL. rite proposer! (5,00 gallous per week) <br /> P](S/1-1 ID mc.ommends that IIIL re%pomible party mmullanenusly J)tonrlor,document, and ri.port File CNILIll <br /> of pluint c.apiurc and escapL vtrlacally and laterally Modifications to the remediation sy%tem and plurnL <br /> Itiorldoring%y,,tem inay bL nLeLssary and limtly reepon¢e�by rONLo are Irnporlant <br /> ThL actual cutrrpuhitlon of IIW Lontaminatit plurnL from this unauthorized releatic may not bL known to <br /> PHS/Fl II) I,xarrlplL%are impuritIV,and by-product~ in fuel rlc.lrvcred and disp+.n%ed which inay have been <br /> mlLatied to the subwrface, Includm.- degradatlr►n cnrnpoillld% Disposal at the Iesoru Rodoo ficilily mu a <br /> mLLt all local,state and fedtral%tandards <br /> • A ilwminn of San Juaqum C ounty 1 is alit, C An. krVI�L 4 <br />