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PACIFIC r ` <br /> aFt4�%rk fR.44 . <br /> `,ENVIRONMENTAL ; E� f y lML H <br /> > GROUP INC.,'. :t7'; %h�, lf, ,. . <br /> ptj I' <br /> January 7, 13W!". ; <br /> Project 920-119.1A;• ; <br /> Ms. Mary Meays .• <br /> San Joaquin County-Environmental Health Department <br /> 304 East Weber Avenue _ <br /> Stockton, California 95202 <br /> Re: Work Plan Addendum for Waste Oil Tank,Hoist, and Product Line <br /> Removal <br /> Chevron Station 9-6171 <br /> 6663 Pacific Street at Benjamin Holt Drive ' <br /> Stockton, California. <br /> Dear Ms. Meays: <br /> On behalf of Chevron'Products Company.(Chevronl:Pacific,Environmental Group Inc. <br /> (PACIFIC) is performing environmental;services associated with the removal-of a,waste <br /> oil tank,three hoists, and product lines at the above referenced site(Figure 1.). A Work , <br /> Plan for Waste Oil Tank,`Hoist, and Product Line Re'moval,'dated'Noveinber 4, 1997, <br /> was,submitted to San Joaquin County Environmental Health Department(SJCEHD) <br /> r <br /> describing the anticipated work scope prior to the commencement of fieldwork.. <br /> Subsequent analysis of collected soil samples revealed soil beneath the-removed waste <br /> oil tank and fuel dispensers was impacted_ . , <br /> Persuant to your request,the following addendum to the'.Work Plan was prepared.to <br /> address specific-aspects of soil over=excavation;the type ofexta'vation equipment to be <br /> "-used;confirmation§oil'sariiiirig-frequencies•and locatians,'andtarget'analytes proposed' <br /> for confirmation sampling. <br /> PROPOSED ADDITIONAL SCOPE OF WORK <br /> Soil confirmation samples will'be collected from the product lines per the Tri Regional <br /> Board Staff Recommendations for,Preliminary Evaluation and Investigation of _ <br /> Underground Tank'Sites.- Additiodal,soil samples will be�collected':at dispenser'areas <br /> .w <br /> previously determined by laboraftory analysis to be impaggc��ted by�•hydibcarbon's <br /> ry 4f i;'f+2•� .rS w 4 3�'A�..! •y'•.'s r'T.+iZ.'yf!r v''':, 'S':.i �.+�+'9,r. <br /> ,The vertical and.hor zontal:extent of impacted soil will1xAelineated,by collecting' <br /> sample.from each side-wall-and one,sample from each floor area of over-excavation <br /> pits., Over-excavation will be conducted,at the former waste oil tank'locatpon and at the . <br /> �hl1u9JJ4;t1 A� <br /> 11315 Sunrise Gold Circle, Suite M, Rancho Cordova,California 95742-'`'(9.16) 858-2350 FAX (916)858-2355 <br />