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,7i, .„.. CONSTRUCTION <br /> C.=s INSPECTION&MATERIALS <br /> IVA AIL-IM ® TESTING LABORATORY <br /> ._. North American Technical Services <br /> October 3,2016 <br /> Morrill Industries,Inc. <br /> 24754 East River Road <br /> Escalon CA 95320 <br /> Subject: Percolation Testing—Storm Drain and Septic Systems <br /> On 9/29/2016,Justin Hasley of North American Technical Services conducted 2 percolation tests <br /> in auger borings at various depths (see percolation test reports and test map for locations). The tests were <br /> performed in accordance with San Joaquin County requirements for preparing and presaturating the soil in <br /> the test hole. After presatu ation, we determined the stabilized percolation rate. The tests for the septic <br /> system leach fields were observed by the San Joaquin County Environmental Health Department as <br /> required. <br /> As part of the associated soils report (#467-1), exploratory borings were made to a depth of 16.5 <br /> feet below the existing grade. Please see the boring logs attached for materials encountered. Groundwater. <br /> was not encountered. Storm drain percolation test results are as follows: <br /> Test Depth Percolation RafeObserved Absorption Rate <br /> A 7.5 ft 1.81 win/inch 71.1 al/f /da _ <br /> B 6.0 ft 1.74 min/inch 74.0 al/ft /da <br /> The Observed.Absorption Rate is the measured rate and does not include any reduction factor. <br /> The material encountered at the tested depths was a light brown sand. <br /> Storm Drain Location Storm Drain Design De th Desi Absorption Rate <br /> A-Intermediate Pond 7..5- 10 below (E)natural rade 35.6 aUft /da <br /> B-Existing Basin W) to 3' below (E) grade of basin 37.0 aUf /da <br /> Design Absorption Rates include a reduction factor of 2. <br /> Percolation raies for septic system design are given below. Systems should be designed in accordance <br /> with San Joaquin County Environmental Health Department requirements. <br /> Septic System Location Test Dew Percolation Rate <br /> Test 91 —East Location 42" below E)grade 22.7 minlinch <br /> Test#2—West Location 42" below rade 1.70 min/inch <br /> Respectfully Submitted, 1.Qgt)FESSIOyy� <br /> r F� R. SOq F2 <br /> Abel R. Soares,RCE# 18260 ( No. 18260 <br /> North American Technical Services Exp F.- 7 � <br /> 4713 ENTERPRISE WAY-SUITE } RNIA -95356.209-545-1108 <br /> SOF Got <br />