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VALLEY AG <br /> M E S E A M C II M <br /> January 27, 1999 <br /> FOR: Mr. Mike Huggins, R.E.H.S., R.D.I. <br /> San Joaquin County Environmental Health Department <br /> P.O. Box 388 <br /> Stockton, CA 95201 <br /> PROJECT: Proposed Calvary Bible Church- Lodi, CA UP-97-03 <br /> SUBJECT: Determination of the average detention time in the septic tanks at peak flow. <br /> TANK SIZE: 3 x 2,000 gal = 6,000 gallons <br /> 30% of volume lost due to sludge and scum accumulations= 0.70 effluent capacity <br /> DETENTION TIME IN SEPTIC TANK FROM PEAK SUNDAY FLOW: <br /> D.T. = 6.000 gals x 0.70 = 1.1 days <br /> 2.0 (peaking factor) x 2,000 gals/Sunday <br /> DETENTION TIME IN SEPTIC TANK FROM AVERAGE DAILY FLOW (ADF): <br /> D.T. = 6.000 gals x 0.70 = 0.9 days <br /> 2.0 (peaking factor) x 2,364 ADF <br /> The minimum acceptable detention time should be approximately 0.5 days,thus the tank <br /> capacity is acceptable. <br /> Respectfully submitted, <br /> Don Chesney, R.E.A. <br /> P.O. Box 3794 1 Turlock, California 95381 1 (209) 668-1403 1 Fax(209) 668-2598 <br />