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DiETz IRRIGATION <br /> Engineers and Contractors 7007 <br /> SERVING AGRIGULTUREAND INDUSTRY 23 P/1 17 <br /> CA Lic.#638281 <br /> �r & "`'�Env 1•;r. = t:,,_ �. <br /> May 19, 2007 <br /> San Joaquin Environmental Health Department <br /> -- = Attn:=Mike-Huggins - <br /> 304 Weber Street, 3rd Floor <br /> Stockton, CA 95202 <br /> Subject: Quarterly Inspection and Sampling of MicroSepTec System at Carmelo <br /> Business Park Tracy, California <br /> Dear Mr. Huggins: <br /> A quarterly inspection of the MicroSepTec system installed at the Carmelo Business Park <br /> Tracy, California was conducted on May 12, 2007. The system was operating normally. <br /> A loose wire was observed on the recirculation pump and was corrected. The two air <br /> compressors were rebuilt as routine maintenance. The meter reading for the effluent <br /> discharge was 1307400. Attached are the results of the laboratory analysis for nitrate. <br /> Based on this reading the calculation of the nitrogen in the effluent is as follows: 14162 x <br /> 31.2 mglL equal 7.05 mg/L nitrogen as nitrate. Since this meets the design criteria of the <br /> 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 <br /> cc: CPC Navarra <br /> 33233 S. Koster Road Tracy, CA 95304-9142 • (209) 832-2910 • Fax (209) 833-1288 • Cell (209)482-7769 <br />