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y. n i 7 <br /> v E RS NEIL O. ANDERSON & ASSOCIATES, INC. <br /> �? Oy GEOTECHNICAL•ENVIRONMENTAL•GROUNDWATER•INSPECTIONS•TESTITIG•LABORATORY SERVICES <br /> > w WEBSITE: WWW,NOANDERSON.COM CORPORATE OFFICE SACRAMENTO OFFICE <br /> % w EMAIL: noa@noanderson.com 22 Houston Lane 4221 Northgate Blvd.,Suite 6 <br /> CHICO: (530)891-6304 Lodi,CA 95240-2405 Sacramento,CA 95834-1227 <br /> 4s S O GAP STOCKTON: (209)472-1901 (209)367-3701 (916)929-9267 <br /> RANCHO CORDOVA: (916)631-4455 FAX: (209)333-8303 FAX: (916y929-9269 <br /> CJ <br /> W <br /> July 17, 2003 c <br /> r <br /> Our Job No. LG02-213 DO r_ <br /> Mr. Mike Huggins, Supervising REHS, RDI <br /> 304 E. Weber Avenue, 3'd Floor 1v <br /> Stockton, CA 95202 ` <br /> _.. _ C ; <br /> Subject: Domestic Wastewater Treatment System <br /> Central Valley Baptist Church <br /> _ 10948 S. Aiort.Wa <br /> y,.Maeca _Cah <br /> nt , fornia- <br /> -- —�. --- _ _� _ - <br /> Dear Mr. Huggins, <br /> The purpose of this letter is to formally inforrin 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 firm 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 /> 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 level. <br /> Additional denitrification will <br /> occur within a shalIaw wastewater 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 /> f <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 />