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�I• J•� I I <br /> Geotechnical Research & Development _ I <br /> ENVIRONMENTAL_HEALTH DIVISION <br /> Febmary 10, 1999 304 E. Weber Ave.Third Floor <br /> GRT) 990()1',) R O. Box 388, Stockton CA 95201-0338 <br /> Approved �$f <br /> Denied ❑ <br /> Mr. Kcirh 'Tali►a. • C nditi ns � <br /> Oil Equipment Service C0Y% uC_1 ae n o� <br /> RO.hox 950 J Date— <br /> an Andreas, CA 95249 I' <br /> i:.E: UST Removals and Soil Sampling at Sunnyside Produce <br /> x,960 West Walnut Grove Road, Thornton, California <br /> sl <br /> Dear NL-. Tallia: <br /> Geoteclu-&al Research and D_-velopment (GRD)has been retained to provide consulting services Cor <br /> az underground storage tapnk (UST) investigation and closuuri;projL�;t conducted o.1 the subject site. <br /> This correspondence provides an account of activities, observations, analytical results and <br /> recorm-= dations relative-r,o this project. <br /> I fle subie t site APN 001-150-29 is a truck sto and convenience store and motor fuel retailing <br /> l r ( ) P <br /> facility i:t Thornton, California. Formerly, three USTs were located Nest of the north end of the <br /> market buiic ng ;!?igura 1)_ The GRD identification number, volume, contents and approximate <br /> dimensions o:the US' s aye given below: <br /> + <br /> US,)' 1_D Number Contents Volume Gallons ��imensions (feet <br /> T1 Gasoline 10,000 8 diameter x 27.5 longf <br /> T:L Gasoline <br /> 10 000 8 diameter x 27.5 Ion <br /> li <br /> T3 i' Diesel 10,000_ 8 diameter x 27.5 long <br /> The USTs were installed in 1984 on previously undeveloped land. Regular(leaded) gasoline has been <br /> stored in UST T1 in thepast. -Reportedly, no significant fuel shills are known in the UST area, and <br /> the USTs passed all annual tank integrity tests to dale. The c�lispensers were located directly over the <br /> ISTs and connected to the USTs by subsurface product line pining. Tbe ground surface over the M <br /> ,gasoline TJSTs was paved,with concrete. <br /> The subs:.USTs and associated product pipin7 and dibptnisers were ex=,ated an removed on 21 <br /> January- 1999 by Oil Equipment Service (OES) of Sar. Andreas, Caiifornia. The USTs were fitted <br /> with Steel Tank Institute'Approval 3 (STI-3) cathodic protection and ir�s�-i!ated ricers. The USTs <br /> 1,vere exon-imed after removal and all were found to bc-- in very go"-,d condition with very slight <br /> con osicn, no tank wall failures were noted in the USTs. <br /> J <br /> (209) 267-5370 • 30 Church Street • Sutter Creek, California 95685 FAX (209) 267-9285 <br /> IE <br />