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R A►MCON <br /> BwfffarrrtnRA 8avlrnnnsn,el Cenfewaft Tne. <br /> F.O.Box 1026 <br /> $751 Commerce Drive <br /> West Sacramento,CA 95691 <br /> Phone!(918)372.7635 <br /> Fox 1916)372-4208 <br /> August 26, 1999 <br /> United States Postal Service <br /> Attention: Richard A. Yehle <br /> 3775 Industrial Boulevard <br /> West Sacramento,CA 95799-0480 <br /> Summary Report <br /> Underground 09 Tank Removals <br /> Contract#056676-99-P-0064 <br /> Tank ZD,Nos 39-1514-3 and 394514-4 <br /> Vehicle Maintenance Facility <br /> 3131 Arch-Airport Road <br /> Stockton, California <br /> Ramcon Project No. 1077 <br /> As you know, Ramcon has removed two 1000-gallon underground oil tanks from the subject <br /> property. The tanks(TK3 and TK4)were both of double-wall fiberglass construction and had been <br /> utilized for waste oil and new oil,respectively. The tanks were properly rinsed and inerted prior to <br /> loading and transport to Triangle,Incorporated of Sacramento for lawful destruction. As required <br /> by San Joaquin County,a soil sample was obtained from the floor of each excavation immediately <br /> after the tanks were removed. Samples also were collected from stockpiled overburden soil. The <br /> sample locations are shown on the attached plan drawing by Kiff Analytical. <br /> The soil samples collected from the site were tested by a State-certified chemical laboratory as <br /> follows: (1) the waste oil sample (TK-3@9`) was analyzed for gasoline, diesel, BTEX, MTBE, <br /> halogenated solvents,waste-oil metals,total recoverable oils,PCBs,and PNAs by a combination of <br /> EPA methods M8015) 8020,8010, 6010,418.1, 8080,and 8270;(2)the new oil sample(TIC-4Q91) <br /> was tested for total petroleum hydrocarbons as diesel and gasoline and for BTEX by the M8015 and <br /> 8020 procedures; and,(3)the stockpile samples(#1 and##2)were analyzed the same as the waste oil <br /> sample. <br /> The chemical laboratory reports are attached and indicate that the waste oil sample(TK-3) was free <br /> of all the various analytes with the exception of a trace of total-recoverable oil and typical <br /> background metals, The two stockpile samples revealed similar results. The new oil sample(TK4) <br /> revealed no identifiable petroleum,hydrocarbons within the carbon range of about C2 to C3O, <br /> Following the described testing,discussions,and your authorization,the excavations were backfilled <br /> with a combination of existing overburden material and imparted aggregate base rock. The surface <br /> was finished with a reinforced concrete slab. <br /> RJItriCOn H:lWPDATA1kp17uepnclnEllt$pORT5L4umR4port Page 1 of 2 <br /> Lk..9 d51n,,,l��L �N VN3aVSVd S3iflOOSSV AINMO1 WdU .0 0002 - L A8d <br />