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INFORMATION SHEET <br /> ORDER.NO. <br /> NEWPORT PACIFIC CAPITAL COMPANY <br /> ARBOR MOBILE HOME PARK 0,"A.STEWATER TREATMENT FACILTY <br /> SAN r'OAVL)"N LOU71V TU <br /> Arbor Mobile Horne Park(MPTP) is at 3.9690 N. Highway 99 Acampo. Wastewater originates from <br /> residerntf,a!sources consisting of 173 mobile homes, the nearby Arbor Storage Complex, and a <br /> clubhouse. The MHP is completely occupied, therefore wastewater flow rates are anticipated to <br /> remain stable in the future. The present discharge flow rate is approximately 45,000 gallons per day. <br /> Raw sewage is collected in the collection system and conveyed by gravity to the wastewater treatment <br /> plant. The Arbor MHP wastewater treatment plant is an activated sludge package plant. Wastewater is <br /> discharged from the package plant to polishing tanks then is disposed of in seepage pits or gravelless <br /> leachfields. There ale a total of 60 seepage pits and one gravelless leachfield area. Seepage pits and <br /> the leachfield are rotated between resting and in-service on a regular basis. <br /> �astrd sludge i;discl,rged to *le sludge storage tank��rhere;t;s �Frnh;rally digested. The digested <br /> sludge is hauled to the City of Lodi regional wastewater treatment system as needed. <br /> The seepage pits are 60-inches in diameter and 25-feet deep with a perforated PVC pipe positioned in <br /> the center of each well. The pipe is position in the center of each well with crushed rock packed <br /> around the pipe and on the bottom of the well. The seepage pits are 60-inches in diameter and 25-feet <br /> deep with a 6-inch perforated PVC pipe positioned in the center. The unsaturated zone between the <br /> bottom of each well and the shallowest reported groundwater level is approximately 25 feet. <br /> The Discharger has experienced failure in the disposal area due to high concentrations of suspended <br /> solids in the effluent which resulted in reduced permeability and reduced infiltration. In response to <br /> the failure, the Discharge's has improved operation of the system to reduce the concentration of <br /> suspended solids in the effluent.t. This Order requires the Discharger to prepare an Operation and <br /> Maintenance Plat',,, an F fflt„e;nt(`nilerrtinri .CyctPm Plan, a Groundwater Well Lnstallation Workplan; a <br /> Groundwater Well installation Report, and a Groundwater Quality Study Report. Surface water <br /> drainage is to the Mokelumne River. <br /> TRO:4111102 <br />