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Sep-04-96 09: 56A THORNTON & SON 408 946 1015 P.02 <br /> - PAGE Ef?r'p5 <br /> DOUBLE WALL TANKS <br /> November 1 f tlr. <br /> PioneerrnQ Pens ' 6vy Containment Systems <br /> w <br /> The tank thrill leafed srcilErsitr under every <br /> opentrig. The plates shall be quarter inch(3`M#hick steel and be <br /> larger in diameter than the tank manhole a wVarsIall be twelve <br /> inches (12')square under NPT tank open itrgs.-'T1w primary tank <br /> shall be constructed in accordance with UL-56 aid ULC 603.1 <br /> requirements_ The tank shall be equipped with the appropriate <br /> removable lift lugs which facilitate site handUng and u%stallation_ <br /> Lift lugs shall be ciiable of withstanding weight of tank with a <br /> safen- factor of 3 to 1. <br /> The tanks shall be constructed with fittings as indicated on accom- <br /> panving drawings. The outer tank shell shall be constructed with <br /> Higi: Density Polyethylene (HDPE) no less than 100 aril thick and <br /> tvel iod to HDPE roto molded heads no less than 2SQ mils thick_ <br /> Fittings <br /> The tank shall be supplied with four inch(}")and two <br /> incl !:!") threaded openings. Each threaded opening will include <br /> `.Fra Lniernal threads and reversed extemAthreads and will pro- <br /> i vtid-- upward through the tank shell. External threads shall be <br /> w i l i?,od to seal outer tank with compiession rings. The fittings <br /> Oha'i be located as indicated on the drawings. <br /> Double Ring Manhole and Sump Mounting <br /> TJr k shall be supplied with double ring )reverse flangema•rho)es with two sets of studded bolts. Eacltt-46anhole shall be <br /> stir.I-A led with lid in place,neo-cork gasket triderneath and the <br /> ai)F ropriate number of washers and nuts.set'mW tightened about <br /> the inner ring of studded bolts. Tank sbaR. be supplied with a <br /> ma-ihole sump mounting kit(shipped 1 each double ring <br /> (DR) manhole. This kit shall number of <br /> washers and nuts,one(1) E .(3I piece steel <br /> compression ring which willlT.IF-he Inounting of a <br /> high density ` <br /> g Pvri#o the outer ring <br /> =TO'EA L= <br /> CONMENT <br />