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�i <br /> 4 <br /> Shadow Lakes Mobilehome Park, LLC <br /> 5100 N. Hwy 99 <br /> Stockton, CA 95212 <br /> January 12, 2010 <br /> i <br /> Brendan Kelly <br /> Central Valley Regional j <br /> Water Quality Control Board <br /> 11020 Sun Center Drive#200 <br /> Rancho Cordova, CA 95670-6114 <br /> SHADOW LAIKES WWTPANNUAL'REPORTI+OR2009 <br /> The attached report representsa revised annual report for the Shadow Lakes wastewater facility <br /> Average annual daily flow for the year indicated 61,969 gallons per day,total flow for the year was <br /> 23,193,120 gallons. However, we believe this to be inaccurate due to high level in pond 1 that exaggerates <br /> the flow readings in the open channel flow meter. Observed flows indicate normal conditions except for <br /> occasional plugging and flow release in the collections system due to grease buildup. <br /> During the year 232,500 gallons of sludge was removed from the plant All waste sludge was aerobically <br /> digested and decanted to reduce volume. All sludge removed is taken to the City of Stockton Regional <br /> Wastewater Control Facility.All waste sludge hauling was perfomed by Richards Pumping of Stockton. <br /> The annual groundwater report will be submitted under a separate cover. <br /> Discussion <br /> f Influent Monitoring <br /> All influent monitoring datawas completed and reported on monthly reports. <br /> >_ Effluent Monitoring <br /> A11 effluent monitoring was completed and reported. <br /> BOD Biochemical Oxygen Demand(BOD) averaged27.9 mg/L over the year. There weretwo monthly <br />` values that exceeded discharge limitations.These occurred in August and December. In August, <br /> over wasting of the mixed liquor caused less than ideal treatment. We do notyet have a cause of <br /> the high BOD for December. <br /> TSS Total Suspended Solis is not a required monitoringparameter, however we use it for a quality <br /> control check on effluent quality. TSS averaged20.1 mg/L for the year with no single value over <br /> 40 mg/L. This represents secondary effluent quality for the year. <br /> SS Settleable Solids averaged<0.1 ml/L for the year with no single value that exceeded effluent <br /> limitations. <br /> TDS Total Dissolved Solids averaged263 mg/L for the year. <br />