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® .� <br /> u"� � <br /> August 29, 2003 <br /> FOR: San Joaquin County Environmental Health Department <br /> Mr. Mike Huggins, R.E.H.S.,R.D.I. <br /> 304 East Weber Avenue, Third Floor <br /> Stockton, 95202 <br /> VIA Fax 46868-0138 and Hand Delivered <br /> PROJECT: Mr. Louis Ceci, Applicant 4y�^ <br /> 28822 South MacArthur Drive <br /> Tracy, CA 95304 <br /> Application Number: PA-03-303 (SA) <br /> SUBJECT: Nitrate Loading and Soil Suitability Studies Addendum <br /> Reference is made to my July 7, 2003 Nitrate Loading Study and Soil Suitability Study Report (Job <br /> Number NLS-09.03). The San Joaquin County Environmental Health Department (EHD) has <br /> requested additional information and changes to be made to this report. These changes are itemized <br /> below: <br /> I. The percolation test locations have been denoted on the Site Plan/Tentative Map. <br /> 2. The complete address and correct PA number has been included on the Title Page. This <br /> page is attached. <br /> 3. On Page 9 of the Report, second paragraph, "A 50%replacement area...." has been changed <br /> to "A 100%replacement area...." The 100%replacement area was denoted on the Site <br /> Plan/Tentative Map. Page 9 with the proper correction, is attached. <br /> 4. Page 3, Section C - PERCOLATION TEST RESULTS does not describe or discuss how the <br /> two percolation test borings were prepared. The two borings were drilled on July 1, 2003 <br /> with a Mobile Drill B-24. A four-inch dia., solid stem auger was used. Due to the <br /> encountered soil structure of a fine sandy silt with intermittent gravel strata in the 42 inch <br /> deep boring,the sidewalls of the hole were not scarified. This would have destroyed the <br /> circular uniformity of the boring by removing too much gravel that was keeping the boring <br /> open. Additionally, a four-inch auger and a B-24 drill rig are much "softer" on the sidewalls <br /> and does not seem to compact the sidewall soil like an eight-inch auger that is typically used <br /> with a large drill rig. <br /> 5. Scarifying a 25 foot deep boring with a sharp instrument that can reach to this depth is very <br /> difficult. Another problem is that if the sidewalls are scarified, it is impossible to retrieve <br /> the 'cuttings" that have fallen to the bottom of the boring without another type of long <br /> instrument to do so. <br /> Page 1 of 2 <br /> P. O. Bax3794 ♦ 7urfoct Cq 95381 ♦ Office (209)668-1403 ♦ Fax(209)668-2598 <br />