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Muro, Claudia [EHD] <br />From: Muro, Claudia [EHD] <br />Sent: Tuesday, March 30, 2021 5:04 PM <br />To: Soua Her <br />Subject: RE: Request to Reuse Rinse Water <br />Hi Soua, <br />I forwarded information to Hazardous Waste and Emergency Response Lead Senior Supervisors, and <br />they do not see any issues with reusing the non-hazardous rinse water through the method you have <br />described. <br />Respectfully, <br />CI audia Mum, Kr L15 <br />Registered Environmental Health Specialist <br />San Joaquin County Environmental Health Department <br />1868 E. Hazelton Avenue I Stockton, CA 95205 <br />Front Desk: (209) 468-3420 I Mobile: (209) 561-8923 <br />SAN JOAQUIN <br />From: Soua Her <souah@sumidenwire.com > <br />Sent: Monday, March 29, 2021 4:52 PM <br />To: Muro, Claudia [EHD] <cmuro@sjgov.org> <br />Subject: RE: Request to Reuse Rinse Water <br />CAUTION: This email is originated from outside of the organization. Do not click links or open attachments unless you recognize the <br />sender and know the content is safe. <br />The pickling tank solution is make of 10-12% sulfuric acid and 88-90% water. This bath is the process where virgin rods <br />from manufacture is submerged in. The bath allows the acid to penetrate the wire rod and mill scale pops off. This is the <br />process for which ferrous sulfate is created. Ferrous sulfate in its final form is moist crystal. Sometimes when process <br />failure occur instead of moist crystals the system pass through liquid solution that has not crystalize yet. When this liquid <br />solution is passed through, it is put back into the pickling tank. <br />1