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DIETZ ENGINEERING AND CONSTRUCTION, INC. <br /> Serving Commercial and Industrial Clients <br /> CA Lic.#638281 RECEIVED <br /> P.;"K 2 8 2012 <br /> ENVIRONMENTAL HEALTH <br /> March 20, 2012 PERMIT/SERVICES <br /> San Joaquin Environmental Health Department <br /> Attn: Rodney Estrada <br /> 600 East Main Street <br /> Stockton, CA 95202 <br /> Subject: Quarterly Inspection and Sampling of MicroSepTec System at Carmelo Business <br /> Park,Tracy,California <br /> Dear Mr. Estrada: <br /> A quarterly inspection of the MicroSepTec system installed at the Carmelo Business Park was <br /> conducted on March 6, 2012. The System was operating normally and no repairs were required. <br /> The meter reading for the effluent discharge was 307231.0. Attached are the results of the <br /> laboratory analysis for nitrate. Based on laboratory results the calculation of the nitrogen in the <br /> effluent is as follows: 7/62 x 1 =0.10 mg/L nitrogen as nitrate. Since this meets the design <br /> criteria of the system no further analysis or investigation was conducted. <br /> If you have any questions please contact me at the number listed below. <br /> Sincerely, <br /> H. B. Dietz <br /> HBD/gwd <br /> Enclosures: Laboratory Analysis <br /> cc: Carl Navarra <br /> 33233 S. Koster Road • Tracy, CA 95304-9142 9 (209) 832-2910 • Fax (209) 833-1288 <br />