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Gooderham, Aaron [EHD] <br /> From: Jennifer L. Campbell <jcampbell@cornerstoneearth.com> <br /> Sent: Tuesday, November 17, 2020 7:28 AM <br /> To: Gooderham, Aaron [EHD] <br /> Cc: Matthew J. Schaffer; Robert Horewitz <br /> Subject: RE: Perc test form and procedure form <br /> Attachments: 14800 Schulte Road Perc Test Results_Updated.pdf <br /> CAUTION:This email is originated from outside of the organization. Do not click links or open attachments unless you recognize the <br /> sender and know the content is safe. <br /> Hi Aaron, <br /> The first two items are addressed in the attached updated data sheets. For the third item,the 0.09 mpi value was used <br /> for test hole#4 rather than the 0.05 mpi as the test hole was completely drained at the end of the time interval <br /> corresponding to the 0.05 mpi value. As such the 0.05 mpi is slower than the actual rate due to the hole being drained <br /> at the end of the time interval. <br /> Thank you. <br /> Jennifer L. Campbell, E.I.T. <br /> Staff Engineer <br /> EC CORNERSTONE <br /> EARTH GROUP <br /> 1259 Oakmead Parkway Sunnyvale, CA 94085 <br /> T 408.245.4600, Ext. 137 C 408.470.0725 <br /> E jcampbell@cornerstoneearth.com <br /> From:Gooderham, Aaron [EHD] <agooderham@sjgov.org> <br /> Sent: Wednesday, October 28, 2020 4:19 PM <br /> To:Jennifer L. Campbell <jcampbell@cornerstoneearth.com> <br /> Cc: Matthew J. Schaffer<mschaffer@cornerstoneearth.com>; Robert Horewitz<rhorewitz@cornerstoneearth.com> <br /> Subject: RE: Perc test form and procedure form <br /> After reviewing the perc test forms, a few more items need to be addressed before I can accept them: <br /> 1) A drawing of the percolation test profile (side view of the boring) showing dimensions of the boring, amount of <br /> gravel used, and fixed reference point used for measurements. <br /> 2) Each form needs to be signed by who performed the test and the qualified profession who certifies the test. <br /> 3) Rational for test hole #4 using 0.09 mpi rather than 0.05 mpi to calculate the perc rate.This would be a <br /> deviation from our procedure using the smallest reading and needs written justification to use it. <br /> Please reach out to me if you have any questions about these items, and thank you for your patience! <br /> Aaron Gooderham—Environmental Health Specialist <br /> Environmental Health Department—County of San Joaquin <br /> Website: https://www.s*gov.org/department/envhealth/ <br /> 1 <br />