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CITY OF STOCKTON <br />AMP Telephone <br />(209)944-8721 <br />[DEPARTMENT OF MUNICIPAL UTILITIES <br />-5_jC 1,4,\Vy [j,-41VE <br />STOCKTON. CA 95206 <br />mmma�� <br />California Cedar Products <br />?. 0. Box 358 <br />Stockton CA 95201 <br />On January 20, 1989, the Environmental Control section found <br />damage to a City storm sewer line on Cal Cedar property. <br />Please refer to the map enclosed. Samples and a pH analysis <br />were taken January 24, 1989 which confirmed corrosive <br />conditions. <br />The following are the results of an onsite inspection at Cal <br />Cedar. There are two areas where industrial waste is <br />draining into the storm sewer. One stream appears to be <br />leaking from the kilns to a storm drain. The pH of the <br />stream by the kiln is 4.2. The other waste stream is near <br />the boiler. A Delta Company solid waste container of wet ash <br />from the air scrubber sits near a storm grating. The <br />drainage from this enters the storm sewer. A sample <br />collected from this st,orm sump had a pH of 12.2. The <br />drainage from the container had a pH of 12.8. This is in <br />violation of the Stockton Municipal Code Section 7-089.16, <br />which states: <br />"No person shall discharge wastewater containing in <br />excess of 5-10 pH." I <br />pH readings above or below this limit constitute a publi <br />health and safety hazard. It is also well documented th <br />extremes of pH will degrade concrete. <br />State and local regulations prohibit the discharge 0 <br />wastewater unless permitted or granted by the appropriat <br />regulatory agency. The creation 1f a nuisance 0 <br />non -permitted disposal of toxic ii)aterial is also prohibitedl <br />