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In <br />Lange Property Page 7 <br />Our Project Number: LGS080011 <br />February 28, 2008 . <br />bottom of the open soil boring. The PVC pipe was then installed on top of the gravel. "Pea <br />gravel" was then used to backfill the annular space. <br />Presaturation of the percolation test holes occurred approximately 24 hours prior to the day of <br />testing. The depth of water used to pre-soak was 12 inches above the bottom of the boring. <br />4.4 Condition of Borings After Presaturation <br />After the 24-hour soak period, the presaturated holes were found to be intact and dry on the <br />day of testing. <br />>/6.5 Percolation Test Procedure <br />Percolation tests were conducted for the borings on February 1 and February 13, 2008 in <br />accordance with the requirements of the EHD. A_per�colation tests-with-a_duration of four (4) <br />hours was performed for each hole. Th las Wal hour of each test was observed by Michael <br />Escotto, Registered Environmental Heal Specialist, EHD. <br />Measurement of the water level during the percolation -test was_from-a-fixed reference point on <br />the PVC casing using an electric well sounder with a depth accuracy of 1/100th foot. All <br />tabulated values on the field data sheet (appendix) are in decimal feet. After water drop was <br />observed, the holes were checked for refill. The refill level was approximately 0.5 ft (6 inches) <br />of water above the bottom level of the percolation test hole. The readings were taken every 30 <br />minutes for a period of four (4) hours. <br />f6.6 Percolation Test Forms and Results <br />The completed percolation test form is included in the appendix of this report. <br />A shallow percolation test is defined by the EHD as being between 36 and 42 inches in depth; a <br />satisfactory percolation rate for a shallow test is less than or equal to 60 minutes per inch drop. <br />A deep percolation test is defined as being between 3.5 and 25 feet in depth; a satisfactory <br />percolation rate for a deep test is 30 min/in or less. No deep tests were required. One <br />percolation test must demonstrate a satisfactory percolation rate within the proposed septic <br />system disposal field of each parcel to utilize a standard septic system. Details of the <br />percolation tests are summarized in the table below. <br />902 Industrial Way • Lodi, CA 95240.209.367.3701 • Fax 209.369.4228 <br />