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f <br /> .t <br /> DiETz ENGINEERING AND CONSTRUCTION, INC. <br /> Serving Commercial and Industrial Clients <br /> CA Lic.#638281 <br /> March 15, 2011 <br /> U <br /> 4 <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 in March 2011. _The System was operating normally. One air compressor was <br /> replaced. Attached are the results of the laboratory analysis for nitrate. Based on laboratory <br /> results the calculation of the nitrogen in the effluent is non detect in nitrogen as nitrate. Since <br /> this exceeds the design criteria of the system no further analysis or investigation was conducted_ <br /> The effluent flow meter.reading was 2,667,540 on March 8, 2011. <br /> If you have any questions please contact me at the number listed below. <br /> Sincerely, <br /> r - <br /> _H. B.Dietz <br /> HBD/gwd <br /> Enclosures: Laboratory Analysis <br /> a <br /> cc: Carl Navarra <br /> 33233 S. Koster Road • Tracy, CA 95304-9142 • (209)832-2910 * Fax (209) 833-1288 <br /> -4- <br /> - <br />