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SWPC <br /> Letitia Briggs REHS <br /> Public Health Services, San Joaquin County <br /> Environmental Health Division <br /> 445 N. San Joaquin Street <br /> PO Box 2009 <br /> Stockton, CA 95201-2009 <br /> 08/18/1995 <br /> Hazardous Waste Generator Program <br /> Ferrous Sulfate/Excluded Recyclable Material <br /> Dear Ms Briggs, <br /> HSC 25143.2 (d) <br /> Re-use of Ferrous Sulfate Crystals <br /> SWPC wish to have our ferrous sulfate crystals excluded as a non-RCRA recyclable <br /> material, as the material is re-used commercially as a safe and effective chemical for the <br /> Complexing of Cyanide in Gold Milling Operations [see Appx ] <br /> SWPC operates an acid recovery system that receives pickle acid from the pickling <br /> operation. and processes it to remove a percentage of the iron from the acid in the form of <br /> ferrous sulfate heptahydrate crystals, and then returns the acid to the pickling <br /> operation for reuse. The acid recovery system is a closed loop system, with the ferrous <br /> sulfate crystals generated as a by-product. <br /> SWPC do not further treat the ferrous sulfate. <br /> The operator that handles the sale, management and end-use of the ferrous sulfate crystals <br /> is : <br /> Crown Technology Inc, <br /> 7513 E. 96th St, <br /> PO Box 50476, Indianapolis, IN 46250-0426 <br /> Ph : (317) 845-0045 <br /> SUMIDEN WIRE PRODUCTS CORPORATION <br /> 1412 EL PINAL DRIVE•STOCKTON.CA 95205 P0.SOX 8719•STOCKTON.CA 95208 209-466-8924•TELEX 359424 <br />