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• Memorandum <br /> CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD e CENTRAL VALLEY REGION <br /> 3201 S Street Sacramento, California 95816 Phone: 445-0270 <br /> TO: Kenneth D. Landau FROM: Gary A. Reents <br /> DATE: 27 February 1985 SIGNATURE: <br /> SUBJECT: SAMPLING AT MANTECA SEWAGE TREATMENT PLANT; SAN JOAQUIN C <br /> Enclosed are the laboratory results of the samples we collected at the subject <br /> facility on 31 January 1985. Also enclosed is a map of the disposal fields which <br /> shows the approximate sampling locations and accompanying results. <br /> In reviewing the results, there is no significant increase in either BOD or <br /> suspended solids in the irrigation drain as it crosses the facility property. <br /> Total coliform values appear to increase and then decrease in the drain adjacent <br /> to the disposal fields, but these results are difficult to interpret given their <br /> relatively low values and the uncertainty within the statistics involved in <br /> developing most probable numbers. Since the fecal coliform numbers are also low <br /> and fairly constant it would appear that there is no significant contribution of <br /> wastewater from the disposal fields to the irrigation drain. <br /> Based on the above I do not feel any further action is necessary at the Manteca <br /> sewage treatment plant beyond that which were requested in our cover letter. <br /> GAR:cab <br /> Enclosures <br />