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CHEVRON EMC 9258420213 05/20 '0:;' 07:57 NO.554 01/02 <br /> Chevron Environmental Robert,D.Mihalovich <br /> Management Company Pipeline Program Manager <br /> Property Management <br /> 6001 Bollinger Canyon Road <br /> P.O.Box 6012 <br /> San Ramon.CA 94583-071.2 <br /> Tel(925)842-1341 <br /> fax(925)842-0213 <br /> May 17,2002 Chevroffexaco <br /> FACSIMILE TRANSMISSION <br /> (91.6)255-301.5 <br /> Total Pages=2 <br /> Ms.Amy Terrell <br /> California Regional Water Quality Control Board, <br /> Central Valley Region <br /> 3443 Routier Road,Suite A <br /> Sacramento,California.95827-3003 <br /> Amendments to April 11.3,2002 <br /> Soil and Groundwater Sampling Work Plan <br /> Roberts Property(Former Vernalis Pump Station) <br /> 35500 Welty Road <br /> Vernalis,California <br /> Dear Ms.Terrell: <br /> Per your email and telephone conversations with Penny Fottrel.l of.Geomatrix Consultants,Inc, <br /> (Geomatrix),it is Chevron Environmental.Management Company's understanding that the subject <br /> work plan is approved with the following amendments_ <br /> ♦ The grab groundwater sample from boring SB-l3 will be analyzed for TPHd. <br /> ♦ An.a.dd.idona.l.boring(SB-1.4•)will be advanced downgra.dient of monitoring well MW-2 within <br /> the subject property boundary(see modified Figure 4,attached). The actual location of this <br /> boring will be based on Held.conditions. Proposed sampling intervals,procedures,and analysis <br /> will be the same as that for boring SB-1.3. <br /> ♦ If measurable free product is present in monitoring well MW-1 during implementation of the <br /> April 2002 work plan,product removal will be performed during upcoming quarterly product <br /> removal activities in the area.. These removal activities are scheduled to take place in July. <br /> Thank you.for your consideration. If you have any questions or require additional information,please <br /> call Penny Fottrell.at(925) 841-1343 or me at(925) 842-1341. <br /> Sincer , <br /> rt D.Mihalovich <br /> Attachment: modified.Figure 4 showing boring SB-14 <br /> cc: Mr.. Harlan Knoll,San Joaquin County Public Health Services:(209)468-3433 <br /> Mr.Martin Bl.oes,Geomatrix- (510) 663-4141 <br /> Mr. Arnold.and.Ms. Doreen Bellini: US Mail <br />