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Tank Assessment Page Tank Name: Final Neutralizer Tanks <br />Tank ages: Purchased new, used 20 years <br />Remainina service life: Estimated 5 years. <br />Tank Construction: <br />Shape: Cylindrical, flat bottom, open top. <br />Orientation. Vertical. <br />Location: Above Ground, inside building (no sun exposure). <br />Material of Construction: High Density Crosslinked Polyethylene <br />Thickness: 0.228" 'fk. 1, 0.249" 'I'k. 2, 0.182" Tk. 3, measured 6" below the top, <br />using an ultrasonic gage. <br />Lining material and thickness: NA <br />Corrosion protection equipment: NA <br />Other identifying features: Seamless, One Piece Construction, Natural, <br />rotationally molded. <br />Piping and ancillary equipment (pumps): <br />Piping Material of Construction: Poly Vinyl Chloride (PVC). <br />Piping Diameter: 3 in_ <br />Pump location: in pre -neutralizer area. <br />Pump type/capacity: centrifugal pump - 40 gpm <br />Pipe from the pre -neutralizer pump to the final neutralizer tank, 26 R. long, is <br />entirely within the secondary containment arca, and is hydrostatically tested at 6 <br />psi semi-annually. <br />Material Storage: <br />Materials and characteristics: Wastewater with pH between 7 and 10. <br />Specific Gravity: approx_ 1 <br />Operating Capacity: 370 gallons. <br />Chemical compatibility findings: The materials identified above: are compatible for <br />contact with or proximity to the equipment, tank or tank system in this assessment. <br />Initials: 0-, � <br />Visual l nspection : <br />Tank parameters at time of inspection: in use. <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 tanks and affiliated piping and <br />ancillary equipment did not reveal signs of leaks, corrosion, weld cracks or breaks, or <br />scrapes in protective coating which may cause a release from the tank system. A <br />description of all discrepancies noted during the visual ilaspection is included with this <br />report. Initials: <br />California Tank Lines, Inc. Final Neutralizer'l'anks (3) <br />