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� .�� I • i8. 2003 12 : 25PY Ne r,O, Anderson & Assoc . ' No - 1155 P . 2 <br /> 94 NEIL 0. ANDERSON & ASSOCIATES, INC. <br /> GEOTECHNICAL-ENVIRONMENTAL.-GA UNDWATER-NSPECTTONs TESTING•LABORATORY SERVICES <br /> a WEBSITE: WWW_NAANDFMOMCOM CORPORATE OFMCE SACRAMENTOOFF1CU <br /> CEMAIL noa&aandmon.com 22 Houston Cane 4221 Nmingate Blvd..suite 6 <br /> CHICO: (530)891-6304 Lodi,CA 95240-24o5 Saarrmenta,CA 95834-1227 <br /> STOCKTON, (209)472=1901 (209)367-3701 (916)929-9267 <br /> RANCHO CORDOVA: 916 631-4455 FAX; 204 333-8303 FAX: 916 929-9169 <br /> July 17, 2003 <br /> Our Job No. LG02-213 <br /> Mr. Mike Huggins, ,Supervising RENS,ADI <br /> 304 E. Weber Avenue, 3'Floor <br /> Stockton,CA 95202 <br /> Subject: Domestic Wastewater Treatment System <br /> Central Valley Baptist Church <br /> 10948 S, Airport Way,Manteca, California <br /> Dear Mr. Huggins, <br /> The purpose of this letter is to formally inform the EHD that our office has been retained to <br /> prepare engineering designs and provide the necessary information regarding an engineered <br /> septic system for the subject site. Our f!=is preparing a"package"which will contain the <br /> system design details, installation manual, service manual, and maintenance agreements. Work <br /> on this project is proceeding. <br /> As we have discussed in several meetings and by telephone, an Oranco Systems AdvanTex <br /> system has been proposed to treat 1,875 gallons peak flow(Sunday) and 436 gallons, average <br /> i daily flow (weekly)generated from the facility. We expect the total nitrate level from <br />' wastewater to be approximately 70 mg/L-N. Nitrification will be performed in the AdvanTex <br /> system. Denitrification in the AdvanTex system will result in a reduction between 50 and <br /> 75+percent of the influent total nitrogen Ievel. <br /> 1 Additional denitrification will occur within a shallow waste water drip system buried 6 inches <br /> below orchard grasses. We have consulted with the Mick Caneari,U.C, Davis Agricultural <br /> Extension, and have selected Orchard Grass mix to be the primary consumer the nutrients and <br /> moisture delivered by a subsurface drip dispersal system. We expect some microbial contribution <br /> in the soil as well. The nutrient requirement for grass, irrigation requirements, and disposal field <br /> size was calculated based on,the average daily flow of the effluent. <br /> I <br /> Monitoring will take place at the outflow of the Oranco AdvanTex system and below the drip <br /> irrigation system emitter. <br /> The major system components are as follows: <br /> 1). One(1)2,000 gal surge tank, no baffle, solids pump, alarm, manual diversion valve. <br /> 2). One(1) 3,000 gal Jenson chambered recirculation tank containing AdvanTex pumping package. <br /> 3). Two (2)AdvanTex AX 20 pods and splitter valve. <br /> 4), One(1)basin pumping package to pressurize geoflow dispersal field. <br /> 5). Geoflow effluent drip dispersal system buried 6 inches below the ground surface with monitoring <br />