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Strandberg Associates <br />348 Concord Drive <br />Menlo Park, CA 94025 <br />650 331 0730, 650 796 9732 c <br />strandbergi@yahoo.com <br />Andrew Bagley <br />Bagley Enterprises <br />2320 Maggio Circle <br />Lodi, CA 95240 <br />(209) 367-4800 <br />Info(aBagleventerprises.com <br />Hazardous Waste Storage Tank Preliminary Assessment for Title 22 <br />Date of Inspection: 4/3/08 <br />The following is a preliminary report for the waste oil storage tank and the waste <br />antifreeze storage tank at the San Joaquin County House Hold Hazardous located at 7850 <br />R A Bridgeford Street, Stockton, CA 95201. <br />Tank Description: <br />The waste antifreeze storage tank is a horizontal rectangular tank with integral secondary <br />containment. It measures 60" long x 46" wide x 58" tall. It has a flat bottom and top <br />and is mounted on 3" steel channels resting on a concrete slab. The tank is steel. The <br />waste is a non-RCRA hazardous waste. The collection trough, pumps and piping are <br />outside of secondary containment. The waste antifreeze is transferred to the waste <br />storage tank from an adjacent waste oil collection trough, which is emptied at the end of <br />each day. <br />The tank was manufactured in June of 2000 by Containment Solutions, SN 887435. The <br />design standard is UL 142. The secondary tank wall was measured by UTG and is 3.1 <br />mm. The UL 142 Standard for minimum wall thickness for new tanks of this type is 2.36 <br />mm. The tank is mounted off the ground within secondary containment. This <br />configuration makes the tank a class I category by the STI SP001 specification. This <br />specification allows the tank to remain in service if the minimum wall thickness is greater <br />than 50 percent of the designed minimum wall thickness. Based on the UL 142 standard <br />and the SP001 specification the tank can remain in service until the wall thickness is 1.2 <br />mm. Based on the current thickness and an estimated corrosion rate of 0.1 mm per year, <br />the expected life of the tank is 24 years. <br />Assessment <br />The following items need to be repaired or replaced prior to receiving the Title 22 <br />certification. <br />