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Soil Suitability Evaluation Page 7 of 18 <br />Austin Road Mini Storage <br />183 South Austin Road, Manteca, California <br />December 13, 2021 NATS Job # 22-282G <br />8.000NCLUSIONS <br />A suitable soil condition for leach fields in San Joaquin County is defined as a stratum <br />capable of percolating water between 1 and 60 MPI at a depth of up to 42 inches below <br />existing site grade. NAT's percolation test result at the proposed leach field was 13.3 <br />MPI for test "P-1 at a depth of 36 inches. In addition, high groundwater level over the <br />last 10 years is indicated to be on the order of 23 feet (approximately 20 feet below <br />proposed base of leach field). Based on these results, it is our professional opinion that <br />soil conditions at these locations are adequate for use of a conventional septic <br />tank/leach field sewage disposal system. It should be noted that if any old existing <br />domestic water wells are observed or encountered at the site, they should be <br />destructed per San Joaquin County Environmental Health Department requirements. <br />9.0 LIMITATIONS OF INVESTIGATION <br />The field evaluation, laboratory testing and geotechnical analysis presented in this <br />report have been conducted according to current engineering practice and the standard <br />of care exercised by reputable geotechnical consultants performing similar tasks in this <br />area. No other warranty, expressed or implied, is made regarding the conclusions, <br />recommendations and opinions expressed in this report. Variations may exist and <br />conditions not observed or described in this report may be encountered during <br />construction. This report is prepared for the project as described. It is not prepared for <br />any other property or party. <br />4713 ENTERPRISE WAY * SUITE 4 * MODESTO * CALIFORNIA * 95356 * 209-545-1108 <br />