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October 23, 2009 Page 8 of 10 <br /> Our Project Number: LGS0090518 <br /> 5 bedroom — 2400 <br /> 6 bedroom — 3200 <br /> 7 bedrooms and above will require consultation. <br /> • Apply 4 inches of compost or peat in the bottom of the filter bed. Utilize gravel <br /> drain systems to improve denitrification. <br /> 6.0 CONCLUSIONS <br /> In summary, percolation rates that meet the minimum EHD standards were achieved in the <br /> proposed septic disposal areas of each of the proposed parcels. Ground water was encountered <br /> on parcel 5 at four feet below grountl�surface. Depth of groundwater is to be determined for <br /> each parcel at the time of development. Any parcels that do not meet the 5 foot setback for <br /> groundwater shall be required to install a raised leach field. The on-site water well was tested <br /> for nitrate and DBCP. DBCP was not detected, and therefore was not above the MCL water <br /> limit of 0.2 pg/L.DBCP was detectable. The nitrate concentration in ground water was found to <br /> 1.8 mg/L, which is well below the maximum contaminant drinking water limit of 45 mg/L-NO3. <br /> 7.0 LIMITATIONS <br /> The conclusions of this report are based on the information provided regarding the existing and <br /> proposed development, the use of the subject property, and the site conditions as they existed <br /> at the time we excavated our test holes and performed the percolation tests. It was assumed <br /> that the test holes and percolation test results are representative of the subsurface conditions in <br /> the general area. <br /> If there is a substantial lapse of time between the submission of our report and the start of <br /> work at the site, or if conditions have changed due to natural causes or construction operations <br /> at or adjacent to the site, we urge that our report be reviewed to determine the applicability of <br /> the conclusions and recommendations considering the changed conditions and time lapse. This <br /> report is applicable only for the project and site studied. This report should not be used <br /> after 3 years without the review and update from our office. <br /> Our professional services were performed, our findings obtained, and our conclusions proposed <br /> in accordance with generally accepted engineering principles and practices. This warranty is in <br /> lieu of all other warranties either expressed or implied. Test findings and statements of <br /> professional opinion do not constitute a guarantee or warranty, expressed or implied. <br /> "04 <br /> 902 Industrial Way• Lodi,CA 95240•209.367.3701 •Fax 209.369.4228 02009 Neil 0..Anderson&Associales,Inc <br />