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Tank Assessment Page <br />Tank Construction: <br />Shape: Cylindrical, flat bottom. <br />Orientation: Vertical. <br />Tank Name: Wastewater Storage Tanks <br />Tank ages: Approx. 18 years. <br />Remaining service life: Estimated 7 years. <br />Location: Above Ground. <br />Material of Construction: High Density Crosslinked Polyethylene. <br />Thickness: per ASTM D1998-93 Section 6.1; 1.5 to 0.75 and 1.5 to 0.5 ins. thick <br />Lining material and thickness: NA <br />Corrosion protection equipment: NA <br />Structural support: NA <br />Other identifying features: Seamless, One Piece Construction, Natural (10,300 & <br />5100 gal.), Black (10,300 & 5100 gal.), rotationally molded. <br />Piping and ancillary equipment (pumps): <br />Piping Material of Construction: Poly Vinyl Chloride (PVC). <br />Piping Diameter: 2 in. <br />Pump location: within secondary containment area. <br />Pump type/capacity: centrifugal, 25 gpm. <br />Material Storage: <br />Materials and characteristics: Wastewater with pH between 3 and 10. <br />Specific Gravity: approx. 1 <br />Operating Capacity: 10,300 gallons. <br />Chemical compatibility findings: The materials identified above are compatible for <br />contact with or roximity to the equipment, tank or tank system in this assessment. <br />Initials: <br />Visual Inspection: <br />Tank parameters at time of inspection: one in use, three empty. <br />Acute visual evidence of leaks: none. <br />Condition of interior surface: good. <br />Condition of exterior surface: good. <br />Condition of nozzles, flanges, fittings at tank: good. <br />Condition of piping: good. <br />Visual Inspection findings: A visual inspection of the tank and its affiliated pumps, <br />piping and ancillary equipment did not reveal signs of leaks, corrosion, weld cracks or <br />breaks, or scrapes in protective coating which may cause a release from the tank system. <br />A description of all discrepancies noted during the visual inspection is included with this <br />report. Initials:/2 <br />California Tank Lines, Inc. Wastewater Storage Tanks (4) <br />