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Tank Assessment Page <br />Tank Construction: <br />Shape: Cylindrical, flat bottom. <br />Orientation: Vertical. <br />Tank Name: 3000 Gal Caustic Tk. <br />Tank age: 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 in. to 0.5 in. thick. <br />Lining material and thickness: NA <br />Corrosion protection equipment: NA <br />Structural support: NA <br />Other identifying features: Seamless, One Piece Construction, Black. <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: 30% sodium hydroxide. <br />Specific Gravity: 1.33 <br />Operating Capacity: 3000 gallons. <br />Chemical compatibility findings: The materials identified above are compatible for <br />contact with oproximity to the equipment, tank or tank system in this assessment. <br />Initials:/.!_? <br />Visual Inspection: <br />Tank parameters at time of inspection: 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 'ncluded with this <br />report. Initial 574 <br />1. X - <br />California Tank Lines, Inc. 3000 gallon Caustic Tank <br />