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• l <br /> t <br /> ENVIRONMENTAL HEALTH DIVISI <br /> 3Q4 E:Mber Ave. Third Floor <br /> P O. Box 388, Stockton CA 95201-0388 <br /> Approved <br /> Denied ❑ <br /> /Conditions <br /> Date I - I - 61 by <br /> fl, PtN lol a( YYt tJST c. <br /> Pof?.i Fug ScP�h] SEC® . . : <br /> DV C --D er� u - hrrr,'rrrrlrrrirrrl Rrrrr,7,r,rrrrcal .M <br /> Ak^(-V T57 bTW-CTL -04fQ-) December 29,.1997 <br /> OK�(�t✓7•�Pcl"`t3 t 1J 1�1�'1f l OtJS � <br /> SAm it�..(.� �v��s �T . <br /> Mr.Ronald Rowe <br /> San Joaquin County Public Health Services <br /> T�Ai S 5 i CIE�7 Envirorimental Health Division <br /> t,JFtc;`FG d 1 L- 304 Easi Weber Avenue,Third Floor <br /> Stockton,California 95202 *+ <br /> neb r( 5np � �C Subject: Work Plan for Offsite Assessment Activities <br /> 'l" o) GQ JIUtI bvl7 Chevron Station#9-8264 <br /> c/�l�,� ��` S <br /> W KTi !I v 6-r D N!S( ff. 3775 Tracy Boulevard _ 1 <br /> Tracy,California E <br /> SECOR Project No.7GO07-002-01 <br /> G1�j/�'f! Dear Mr.Rowe: <br /> i / 121��U b q ��'J-`^f ) SECOR Tntemational Incorporated(SECOR)has prepared this letter on behalf of <br /> lbt`V� � �.U�� Chevron Products Company(Chevron),which presents a work plan for offsite <br /> t assessment activities east of the subject site(Figure 1)- This work plan has been <br /> qprepared in response to your letter,dated November 21;1997.lite- 14,mZO 4Y.- , <br /> k <br /> (, XX'(OVG% CDW?? WVAIT-i1XT1QrVb As you indicated during our telephone conversation on December 23,1997,the site is. <br /> t , likely within an area underlain by a commingled plume resulting from past documented <br /> releases on and surrounding the site. The purpose of the work proposed in this work <br /> 3 !(�, - �n plan is to investigate the lateral and vertical extent of previously reported hydrocarbons <br /> /V',I� in soil and groundwater downgradient of the potential source areas on the subject site, <br /> v rr �c and to gain additional hydrogeologic information near the site. This information <br /> � y combined with a file review and records research performed for the subject site and a. <br /> r/ review of County's files of work performed for the nearby sites will be utilized to <br /> determine the need for additional investigative work onsite and Chevron's relative <br /> contribution to the existing hydrocarbon plume(s)beneath the site area. <br /> This work plan includes a brief discussion of site background,previous investigations, Ik. <br /> proposed'scope of work,and schedule. Field and laboratory procedures are outlined in <br /> Attachment A. <br /> Alf <br /> I N AINA_T+ 66 Tb sl�`i��1LG' <br /> ;0$1Fix'Circle.Srrih•2:)4. Surnurrrrrin.L:a974?;1916+;(d-18fi0rIlG,;ri-fSVF4.V error oc :Con <br /> 1 � <br /> N <br /> k <br />