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PUBLIC HEALTH SERVICES <br /> SAN JOAQUIN COUNTY z: r— <br /> ENVIRONMENTAL HEALTH DIVISION ` <br /> Karen Furst, M.D., M.P.H., Health Officer <br /> 304 East Weber Avenue, Third Floor • Stockton, CA 95202 4`'FoaN <br /> 209/468-3420 <br /> TITLE: POLICY FOR PERCOLATION TEST PROCEDURE <br /> POLICY NUMBER: 98-02 <br /> EFFECTIVE DATE: January 2, 1998 ti <br /> . �, �✓ <br /> APPROVED BY: Donna Hera , 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 $78.00 per test hole. <br /> A. Note on parcel map the location of Percolation Test Hole(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 /> II. Measurements of the Percolation Test Hole(s). <br /> A. Diameter = 4 inches to 12 inches <br /> B. Depth = of leach field - 36 inches <br /> III. Preparation of the Test Hole. <br /> 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 /> 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 /> 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 /> period. <br /> C. Calculate the percolation rate in "minutes per inch." <br /> 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 /> gravel. <br /> A Division of San Joaquin Count}' Health Care Services <br />