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Tank Assessment Page <br />Tank Name/marking: 275 Gal. Snyder Industries. Inc. <br />Waste Antifreeze Tank <br />Tank age 192(k)(3): ~8 years 8 months old <br />Remaining service life192(k)(11): at least 5 years <br />Tank Construction (22 CCR §66265.192(k)): <br />Shape: Vertical, cylindrical, single-compartment, primary tank. Primary <br />tank placed within secondary tank, rim of primary tank molded to wrap <br />over lip of secondary tank, providing an interface resistant to entry of <br />precipitation. The secondary tank has a blended form octagonal shape. <br />Orientation 66265.192(k)(1): Vertical tank constructed from high density <br />linear polyethylene (HDLPE), with a 275 gallon capacity, manufactured by <br />Snyder Industries, Inc. (SII). <br />Location (above/below ground): Aboveground storage tank (AST), see <br />Attachment 1, Figure 1 for site specific location. <br />Material of construction 66265.192(k)(2)(A): The inner tank is <br />constructed of a natural color (white) HDLPE resin via rotational molding, <br />with a wall thickness equal to or greater than ASTM D-1998 standards. <br />The current use is compatible with manufacturer chemical resistance <br />recommendations (SG = 1.9 or less). <br />See manufacturers drawing in Attachment 3. <br />Thickness and method used to determine 66265.192(k)(2)(B): <br />According to SII, the tank was designed to ASTM D-1998 standards; <br />however, its capacity is less than 500 gallons, so the tank is not marked <br />with the standard. The HDLPE resin tank wall thickness is 0.18 inches <br />thick (3/16 inch) according to specifications provided by SII. Standard <br />molding tolerances suggest that dimensions listed on manufacturer <br />drawings may vary +/- 3%. <br />There was no obvious means of measuring tank wall thickness that do not <br />involve destructive testing. The penetrations into the primary tank were <br />molded in a fashion that would not allow for wall thickness measurement <br />using calipers or similar means. <br />Lining material & thickness (if applicable): Not applicable. The interior <br />of the primary tank is not lined. <br />Corrosion Protection equipment 66265.192(k)(5): Not applicable. This <br />tank is constructed of plastic. The tank is chemically compatible with the <br />intended contents and generally resistant to corrosion. Ultraviolet-A (UVA)