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January 7,2003 <br /> Job Number: LG02-026 <br /> age,7 . <br /> _ 6.0 CONCLUSIONS AND RECOMMENDATIONS <br /> In conclusion, a satisfactory percolation rate was achieved on the parcel adjacent to the existing. <br /> ' filter bed septicsystem.stem. No ground water was encountered in the borings. The depth to ground <br /> water was found to.be greater.than 45 feet in a boring excavated by Neil O. Anderson & <br /> . Associates, Inc. during a geotechnical investigation in'May 2002 of the property. -The DBCP and . <br /> nitrate water quality tests do not,exceed the maximum contaminate level for those chemicals. . <br /> Based on,the results of this study, the soils and the existing filter bed septic system appear to be <br /> satisfactory for the proposed development, As mentioned previously; the existing filter bed <br /> disposal 'area and the proposed increased use level appear to be satisfactorily matched... This <br /> observation is based on typical assumptions and methods used in the industry and in San Joaquin <br /> County: The calculation has also shown that there is no additional disposal capacity-available in <br /> the design. There appears to be ample tank capacity available: <br /> Since the fitter bed system is over`10 years old and the avaiiable disposal capacity within the .. <br /> existing filter bed to be utilized by the new use, our office recommends the entire septic system <br /> be inspected.by a quailed septic system service company_ Any needed servicing of the septic <br /> system should be performed. Regular septic system maintenance consisting-of tank cleaning and <br /> inspections can increase the life.of the system. We recommend a filter bed repair area be• <br /> identified and set aside if one has not been made already. Should the system experience reduced <br /> performance or failures,.the:expansion area could be utilized for.repair ifnecessary.. <br /> 3A LIMITATIONS <br /> The conclusions.of this report are based on the information provided regarding the existing and ,. <br /> proposed deyelopment;:theuse of the subjectpropeity, and the site.conditions as.they existed at <br /> the time•we excavated our test hole and performed the percolation test: It was assumed that the <br /> . test hole and percolation test results are representative of the subsurface conditions in the general <br /> area. <br /> 411 V F.Aso <br /> z w . <br /> a � <br /> r <br />