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+ PUBLIC HEALTH SERVICES <br />� Pputk <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Karen Furst,M.D., M.P.H., Health Officer <br /> 304 East Weber Avenue, Third Floor • Stockton, CA 95202 <br /> 2091468-3420 <br /> TITLE: POLICY FOR PERCOLATION TEST PROCEDURE <br /> 4 POLICY NUMBER: 98-'02 <br /> i • EFFECTIVE DATE: January 2, 1998 n <br /> APPROVED BY: Donna Hero, KEll, HS, Director, Environmental Health Division <br /> The San Joaquin County Environmental Health Division (EHD) has adopted the following procedure in <br /> order to evaluate and process percolation results uniformly, effectively, and quickly. <br /> I. Application for Percolation Test Permit shall be obtained from the EHD at S78.00 per test hole. <br /> A. Note on parcel map the location of Percolation Test HoIe(s). <br /> B. Percolation Test Hole(s) shall not be located within 100 feet of any well, or violate any other <br /> set-back requirements for a septic system <br /> j <br /> It. Measurements of the Percolation Test Hole(s). <br /> A. Diameter = 4 inches to 12 inches <br /> B. Depth = of leach field - 36 inches <br /> M III. Preparation of the Test Hole. r <br /> . a A. Scratch or score sides to remove any smeared soil surfaces. <br /> B. Remove loose material from hole. <br /> } C. Add 2 inches of course sand or fine gravel. <br /> IV. Saturation. <br /> j A. Presoak Test Hole 24 hours before test by adding water a minimum of 12 inches over gravel. <br /> The EHD is to be notified of start of Percolation test. <br /> i V. Procedure #I - if water remains in the test hole overnight. <br /> A. Add clear water to approximately 6 inches over the gravel. <br /> B. From a fixed reference point, measure the drop in water level over a thirty (30) minute <br /> peri <br /> o_d. <br /> C. Calculate the percolation rate in "minutes per inch. <br /> F', i VI. Procedure #2 - if no water remains in test hole overnight_ <br /> A. Add clear water to bring depth of water in the hole to approximately 6 inches over the <br /> F. gravel. <br /> i <br /> F A Division,of San jna loin County Favolth Care 7rn'iCes <br /> { <br />