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Mr.Richard Dewhurst <br /> January 29,2003 <br /> Page 2 <br /> For the proposed changes, EHD staff approval will be required. With your approval, a fax and letter copy <br /> will be sent to EHD staff for their consideration. <br /> Upon their approval,a"wet stamped"revised plan will be submitted to EHD indicating the layout. The <br /> following table proposes the configuration of the engineered septic system for the 3 bedroom residence. <br /> The approved doubled system for the 3 bedroom residence is currently 7 leach lines, 90 feet each with 7 <br /> seepage pits,42-inch diameter each,25 feet deep. Since the system contains an odd number of leach <br /> lines,the primary configuration will consist of 4 leach lines and pits,the fully built"double system"will <br /> consist of adding an additional 3 leach lines and 3 pits. The configuration proposed is as follows: <br /> System Stage System Make Up <br /> "Primary"Configuration Install four leach lines, 90-ft each. Attach a 42-inch diameter by <br /> 25 feet deep seepage pit to the end of each leach line. <br /> "Doubled"Configuration Add three more leach lines,90-ft each.Attach three more pits, <br /> 42-inch diameter by 25 feet deep to the end of each leach line. <br /> The proposed changes contained in this letter are based on the information provided regarding the <br /> existing and proposed development, the use of the subject property,and the site conditions as they existed <br /> at the time we excavated our test hole and performed the percolation test. It was assumed that the test <br /> hole and percolation test results are representative of the subsurface conditions in the general area. <br /> Our professional services were performed,our findings obtained,and our conclusions proposed in <br /> accordance with generally accepted engineering principles and practices. This warranty is in lieu of all <br /> other warranties either expressed or implied. Test findings and statements of professional opinion do not <br /> constitute a guarantee or warranty,expressed or implied. <br /> Please sign and return this agreement to our office to proceed with the changes proposed. <br /> Best Regards, <br /> NEIL O.ANDERSON&ASSOC.,INC. <br /> �{ /1X,11 <br /> ccepted Dap avr J. Velch,M.Sc., Senior Geologist <br /> CEG-2151,CHG-653 <br /> DJW/ <br /> (�ip,ED GF© <br /> cc: Mr. Mike Huggins(EHD) 5 �, <br /> 304 E.Weber Avenue,3id Floor <br /> Stockton,California 95202 rc O No. 2151 <br /> CERTIFIED <br /> ENGINEERING • <br /> NJ GEOLOGIST <br /> • 4 <br /> 9�OFCAUFO� <br /> a <br />