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Soil Suitability&Nitrate Loading Evaluation CTE Job #25-1084G <br /> New Septic Leech Lines <br /> 21850 East Liberty Rd <br /> Clements, California <br /> January 30, 2021 Paize <br /> field was 30 min/inch which is within the acceptable range for a suitable rate indicated by the San <br /> Joaquin County. Mitigation by system design or enhancement is not required for parcels with <br /> percolation test results meeting these criteria. High groundwater level is expected to be at <br /> approximately 121 feet depth at the site/vicinity which is well below the advisable groundwater <br /> depth for a typical 42-inch deep dispersion field with percolation rates indicated. Low-moderately <br /> permeable soils (e.g., silts and clays) also provide adequate treatment of the percolating <br /> wastewater. <br /> As stated in Section 9.0 above, CTE estimates that the potential nitrate-nitrogen (N) concentration <br /> in groundwater resulting from the new leach field should be below the State of California drinking <br /> water standard of 10 mg/L. <br /> Based on these results, it is our professional opinion that soil conditions are adequate for use of a <br /> conventional septic tank/leach trench sewage disposal system; therefore, an alternative system will <br /> not be required. <br /> 11.0 LIMITATIONS OF INVESTIGATION <br /> The field evaluation and geotechnical analysis presented in this report have been conducted <br /> according to current engineering practice and the standard of care exercised by reputable <br /> geotechnical consultants performing similar tasks in this area. No other warranty, expressed or <br /> implied, is made regarding the conclusions, recommendations and opinions expressed in this <br /> report. <br /> Our conclusions and recommendations are based on an analysis of the observed conditions. <br /> Variations may exist and conditions not observed or described in this report may be encountered <br /> during construction. If conditions different from those described in this report are encountered, <br /> % <br /> TCZQIF <br />