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r <br />kn KLEINFELDER <br />File No. 20-3377-01 <br />December 8, 1993 <br />Mr. David D. Von Savoye <br />Zagaris Management Service <br />1230 East Orangeburg Avenue <br />Modesto, CA 95350 <br />Subject: ESCALON RANCH SUBDIVISION <br />SAN JOAQUIN COUNTY, CALIFORNIA <br />Dear Mr. Von Savoye: <br />This letter is intended as an addendum to our previous reports prepared for the subject <br />subdivision. Reference is made to our "Revised Geotechnical Investigation and Septic System <br />Suitability Study" report dated December 10, 1990, and our "Nitrate Content Tests" report dated <br />February 1, 1991. <br />At the time of our previous reports, the proposed subdivision was to contain eighty-four <br />approximate 21h -acre residential lots. At this time, we understand that the portion of the <br />proposed subdivision east of the proposed Dalton Avenue will be developed and will contain <br />twenty-four approximate 5 -acre lots. The first portion of this development will include <br />combining the previously proposed lots 1 and 24, 2 and 23, 3 and 22, 4 and 21, 5 and 20, and <br />6 and 19 to create six approximate 5 -acre lots along Lone Tree Road. Additional details of the <br />proposed development are not known to our firm at this time. <br />As presented in our December 10, 1990 report, we performed five series of percolation tests on <br />the approximate 1/2 of the proposed subdivision east of the proposed Dalton Avenue. As <br />discussed in our report, the percolation tests generally indicate that sump pits on the order of 10 <br />to 15 feet deep will be required to obtain the required percolation. In our opinion, the <br />percolation tests are representative of the entire site. <br />Based on our understanding of the currently proposed development, it appears that the <br />subdivision will now contain approximately 1h of the number of septic systems assumed for our <br />previous studies. Therefore, it remains our opinion that because of the relatively -deep <br />groundwater (approximately 80 feet below existing ground surface in 1990) and the relatively - <br />impermeable clay layers above groundwater, the likelihood of significant changes in the nitrate <br />level of groundwater beneath the site is very remote. <br />Copyright 1993 KLeinfelder, Inc. <br />KLEINFELDER 2825 East Myrtle Street, Stockton, CA 95205 (209) 948-1345 <br />