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DiETz ENGINEERING AND CONSTRUCTION, INC. <br /> Serving Commercial and Industrial Clients <br /> CA Lic.#638281 <br /> July 29, 2012 Ven <br /> Alit, 032012 <br /> ENPRRMM S6 AL HEAU'H <br /> San Joaquin Environmental Health Department RV/CEs <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 July 2, 2012. The System had a low air alarm. An air tube was broken and <br /> replaced.No other repairs were required. The meter reading for the effluent discharge was <br /> 324022.0. Attached are the results of the laboratory analysis for nitrate. Based on laboratory <br /> results the calculation of the nitrogen in the effluent is as follows: 7/62 x 1 =0.10 mg/L nitrogen <br /> as nitrate. Since this meets the design criteria of the system no further analysis or investigation <br /> 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 • (209) 832-2910 9 Fax (209) 833-1288 <br />