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printech, August, 2000
safe disposal of used black and white chemicals


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From:GaryJGATF(gjonesprinting@aol.com)
Date:Thursday, August 17, 2000 9:54 AM


Your question about being able to discharge industrial process chemistry to a septic system is a good. In all but a few limited circumstances, discharging industrial chemistry to a septic system is not acceptable. septic systems are designed to treat domestic sewage and not industrial discharges. Industrial discharges contain contaminants that are not degraded by the bacterial present in the septic system sludge and pass through to the drain field untreated, potentially causing contamination to the soil and groundwater. Used chemistry contains a variety of organic chemicals, acids, basses, and silver and should not be discharged to a septic system. You may be able to obtain a permit from your state agency to discharge this chemistry, but it will have to undergo extensive pretreatment and it may not be worth the cost. The silver will have to be removed, the acid and bases neutralized, and perhaps the organics partially or fully digested. However, you need to contact your state prior to discharging to see if they even grant permits for this type of discharge. Many states just simply prohibit any industrial discharges to septic systems. Let me know if I can be of any more assistance. Gary Jones Graphic Arts Technical Foundation 200 Deer Run Road Sewickley, PA 15143 412/741-6860 x608 - Phone 412/741-2311 - Fax



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