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r � ilM)w,lr+nnls(s rinks,Al onsets,C&hrwnta post•14�j.tl Na.441 40-470 Pa;•9 A precision tank tell has been perfnrrned on the tarh t and product lines, !(nulls frrrns the Iank tests Indicate the rank%and lutes art til;ht. 3.3 S�Ii,.L(lstttrtr from the information presvidcd,there have been no documented releases of Petroleum h}•droearbnns A[ the silo since the silo was Purchased in 1983. Jerry and"isne hlnnrc own a rlrnlrslic well IocMed on the site, A domestic Well is alto lc:Qted at*oul SU yards south of the sift at the location of ran a;sartment building Wiglrre 2). A con'Plete inventory of existing wells near the site has t_vcn inifiatcd at the M-Pariment of Water Resouicts in Sacramento, California. Results of this inventory will be reported in the Prelinlinary 1j)-droRrObIgir A: essnrr'ttr Rrfwrl, to be submilted following compittion of the activities dcscritsed in this Work Plan, r l �tl The 10010n of any city utilities located adjacent to or ai the site will be verified with the City of Manteca Public Works T3epartment prior to eonmcncernrnt of field activities 11 the site, A leach yield and buried septic tank are 1001M as shown of Figure 2. Manteca,California it located within the Great Central Valley Geo-morphic Province of California, The Cenral Valley Province is bordered to the tart by the Sierra Nevada Mountaini and to the swest by the Coast Ranges. Surficial Iteolot;y in the rfar,tt-ca area consists primarily of recent alluvium and the Victor Formation. !lath units consist of discontinuous lenses of gravel, sand and clay. The combined thickness of both units typically does not exceed about ISti feet. The Victor formation underlies recent alluvium(where present)and occurs as a.band approximately 15 miles wide in the call ,enlni portion of he county and extends the entire length of the county. The Victor formation dips gerilly to the ATsl, where it interfingrrs and blends with flpo) basin deposits about 3 miles west of A13nIKa. A generalised atraligrsphic eolvmn of the geologic units Present in San loaquir, County is presented in Table d.