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r = � <br /> a _:._ company <br /> RECEI\� <br /> �® <br /> August 14, 2018 <br /> AUG 202018 <br /> Via e-mail: Art.Gomez@nwpump.com <br /> Cc e-mail: Doug@ustservices.com ENVIRONMENTAL HEALTH <br /> Art Gomez DEPARTMENT <br /> Northwest Pump & Equipment Co. <br /> 4433 Enterprise St <br /> Fremont, CA 94538 <br /> Art: <br /> This letter outlines the procedure that Xerxes Corporation personnel will follow to replace <br /> and install a collar and sump on a Xerxes 10-foot-diameter, 8k x 7k Double-Wall II, <br /> underground gasoline storage tank. This tank is located at Shell Station — 7700 Moreland in <br /> Stockton, CA 95212 <br /> Background <br /> Xerxes received a call from you requesting an estimate to remove an existing flat sided <br /> collar and sump do to leaks, Xerxes has provided an estimate to do this work. <br /> Scope Of Work <br /> The modification process will follow the Fiberglass Petroleum Tank and Pipe Institute (FPTPI) <br /> Recommended Practice T-90-01 (Remanufacturing of Fiberglass Reinforced Plastic(FRP) <br /> Underground Storage Tanks) and using approved UL materials. <br /> The first step after the tank is tested with a gas meter and deemed safe. The existing collar will <br /> then be removed cut and sanded to expose glass fibers and then, using approved UL materials, <br /> the new collar would be laminated to Xerxes standard per UL requirements. This work would be <br /> done by hand using the contact molding method of fabrication. No spray equipment would be <br /> used. All safety procedures would be followed including the venting of the tank along with <br /> constant monitoring of the exterior tank environment to insure safe working conditions. <br /> After the modification has properly cured, Xerxes personnel and the site contractor will perform <br /> the normal installation pressure tests in accordance with Xerxes tank installation publications. A <br /> Notice of Tank Modification will be provided to the tank owner indicating that the warranty will <br /> remain in effect and continue for the duration stated in the original warranty based on the date <br /> of purchase. <br /> CORROSION XERXES KLDUAu�n ZCL� ( .:l_a._f3E^AA <br /> a- company a m company a s company <br />