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t <br /> DiETz ENGINEERING AND CGNSTR UCTTaN, INC, <br /> Serving Commercial and industrial Clients RECEIVED������ <br /> CA Lic.#638281 <br /> February 25,2011 FEB 2 5 2011 <br /> ENVIRONMENTAL HEALTIJ <br />' <br /> PERMIT/SERVICES <br /> San Joaquin County Environmental'Health Department �5/� <br /> Attn: Lisa Medina <br /> 600 East Main Street ` <br /> Stockton, CA 95202 <br /> Subject: JD Service Station Septic System Thronton California <br /> P Y a <br /> Dear Lisa: ° <br /> On.February 7, 20111 was called by the manager of the JD Service Station at Thronton, <br /> _California and shortly after by yourself that there was a noticeable amount of clear effluent on <br /> the surface of filterbed#1 (east) and 42(middle). During our phone conversation I agreed to <br /> immediately schedule a pumper to remove the liquid and to pump the lift station and microseptec <br /> units to eliminate the flow to the surface. This work was scheduled for the morning of February <br /> 8, 2011. I also agreed to analyze the problem and provide a recommendation to you. <br /> Immediate Actions Taken <br /> • The lift station and the first and last chamber of each of the three microseptec units were <br /> Pumped to remove all liquid. <br /> Any surface liquid was also collected with the pumper truck. E <br /> • On the first day following the rain the surface affected by the liquids overflowing was <br /> treated with lime. This treatment was done on 2112111. <br /> The system was checked out to verify that all pumps were working. This was done on� <br /> 219/11. <br /> Problem Analysis i <br /> f <br /> • A review was made of the flowmeter data from each of the three microseptee units <br /> leading to the filterbeds to look for an unusual occurrence such as a failed pump or an <br /> increase in usage. Attached is a drawing showing the cumulative gallons versus time for <br /> March of 2009 to January of 2011. The table below shows the total gallons during the <br /> period of January 2014 to January 2011 and the gallons per day for each of the filterbeds. <br /> k <br /> k <br /> 33233 S. Koster Road • Tracy, CA 95304-9142 (209)832-2910 Fax(209) 833-1288 <br />