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DELTA PLATUG, PNC, <br />I TS <br />818 S, STANTISLA _; STIP _= <br />STOCKTON, CA. 95206 <br />Richard Stiffler <br />City of Stockton <br />,I,;, <br />2500 Navy Dr. <br />Stockton., Ca 95206 <br />Dear Nlr, Stiffler, <br />Delta Plating, Inc. has changed the use of water wid-iin our electroplating operations. The use of <br />fresh nicorning water as a water source has been eliminated. The mcomn ingl,, water for the threc-, (3) <br />fi%ce flowing N-vater rinse tanks are either reused cooling water orrceycled %vaste water. ThQ <br />nickel rinse water is cooling water from two (2) air compressors. The cyanide rinse water is <br />,00ling water froni an . -;.dr compressor. The chrome rii-ise vvater is recycled water from (:lie <br />pretreatment system prior to discharge to the cite sewer s-vstem. This chanae in water source does <br />not I <br />produee a zero discharge system, but does reduce vvater use by 2500 to 3500 gallons per day. <br />The attachments Alustrate the change in our process. <br />Additionaliv. Delta Plating, inc. has a int al change for recycling floor sweepirig J'he floor <br />sweepings are recycled in four (4) categofies. The categories are as follows: copper wire.: <br />metal-, paper ,car dboard"' and metal (lust. <br />if you.. have any questions., contact Doug, Baker. <br />Doug Baker <br />General Manaager <br />C'C. Coulity of Sin Joaquiri Office of Emergency Sen.ices <br />County of San Joaquin Environtnental Health <br />