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SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DEPARTMENT <br /> 304 East Weber Avenue, 3rd Floor, Stockton, CA 95202-2708 <br /> Telephone:(209)468-3420 Fax: (209)464-0138 Web:www.sigov.org/ehd <br /> REQUIREMENTS CHECKLIST COMMENTS <br /> SITE LOCATION: 31717 S CHRISMAN IZD, TRACY PA#: 04-00561 <br /> REPORT DATE: 06/08/2005 <br /> Section Comments <br /> SSS-1.1 The report presented a slope for the entire parcel. Please provide a description of the topography in the area <br /> anticipated to be used for sewage disposal, as it relates to the suitability for sewage disposal. <br /> SSS-1.4 No detailed site map was included in the report. Provide a detailed site map showing the existing structures, <br /> drives, wells, septic systems, large trees, natural drainage courses, etc. <br /> SSS-3.1 Provide a description of the existing on-site sewage disposal system (likely age, usage, system type, etc.). <br /> sss-a.2 Provide additional discussion on the existing and potential nitrate groundwater contamination issues in the <br /> NLS--2.2;3.1 g p <br /> Y <br /> general area. Specifically, please elaborate on the 28 ppm nitrate upgradient source and the existing and <br /> potential on-site nitrate sources and their cumulative effect on water quality. <br /> SSS-6.1 Distances to percolation test locations were paced out due to rough terrain. To obtain a more precise <br /> measurement for future projects, please consider the use of a measuring tape when a measuring wheel <br /> cannot be used. <br /> 556.6.7;8The mathematical recalculation of actual field test results to obtain passing rates is unacceptable. Pursuant <br /> to the San Joaquin County Sewage Standards, a rapid percolation test does not constitute a percolation <br /> F <br /> test"failure". It does, however, require an evaluation on the influence the loading rate will have on future <br /> water quality. In addition, a shallow percolation rate of over 60 minutes per inch may not preclude the <br /> use of a standard system, depending on the evaluation of the deep percolation test results. <br /> Please provide a revised conclusion and recommendation section reflecting an evaluation of <br /> the actual field test results as they relate to the suitability of the sites for septic system usage. <br /> Any future septic system design considerations that vary from standard systems, including <br /> alterations to mitigate nitrate loading, may be considered an engineered/alternative system. <br /> i <br /> i <br /> �I <br /> I <br /> i <br /> EHQ 26-03 Page 3 of 3 Sail Suitability Checklist <br /> 7/14/2003 <br />