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PUBLIC HEALTH SMVICES <br /> SAN JOAQUIN COUNTY �Z <br /> ENVIRONMENTAL HEALTH DIVISION <br /> .s <br /> Karen Furst, M.D.,M.P.H., Health Officer <br /> 304 East Weber Avenue, Third Floor• Stockton, CA 95202 •Cyt%aatiy'�~ <br /> 209/468-3420 <br /> October 9, 2001 <br /> FILE COPY <br /> David Welch <br /> Neil Anderson &Associates <br /> 22 Houston Lane <br /> Lodi, California 95220 <br /> RE: Soil Suitability Study for 26534 East Magnolia Avenue, Escalon, <br /> For Land Use Application #SU-00-04,Service Request#SR0027463 <br /> San Joaquin Public Health Services, Environmental Health Division has received and <br /> reviewed your study dated May 30, 2001, and have the following concerns: <br /> A. As stated in our Environmental Health Division conditions letter dated August 8, <br /> 2000, condition "A" states that the San Joaquin County Development Title requires a <br /> Soil Suitability/Nitrate Loading Study for this project prior to approval of parcel or <br /> final map. Environmental Health Division is therefore requiring an addendum to <br /> address the Nitrate Loading Study through the use of the Hantzsche-Fennemore <br /> Equation or its equivalent. The study should address the current nitrate levels and <br /> how proposed septic systems might affect these levels, taking into consideration the <br /> possible addition of second unit dwellings on each parcel. <br /> NOTE: The study should provide the design criteria for the proposed septic systems as <br /> required by condition "C" referenced in our letter of conditions dated August 8, 2000. <br /> B. In your discussion of the percolation tests,you indicated the soil was ripped two ways <br /> by agricultural equipment to remove the hardpan prior to the percolation tests. This is <br /> not an accepted procedure since it alters the soil's characteristics and does not provide <br /> an accurate reading of the soil's absorption rate in a normal compacted state. <br /> Your percolation tests results indicate you acquired passing percolation rates on all <br /> seven parcels at depths ranging from 21/z feet to 14 feet. San Joaquin County <br /> Environmental Health Division policies and procedures require a shallow percolation <br /> test be done on all seven parcels. It is our Department's goal to ensure that as many <br /> shallow septic systems as possible be installed in our County to protect underground <br /> aquifers. <br /> A Division of San Joaquin County Health Care Services <br />