Laserfiche WebLink
33503 S Koster Road Project No. 2021-00073 P a g e | 12 <br />8.3 Percolation Test Form and Results <br />The completed percolation test permit and test form are included in the Appendix E of this <br />report. A shallow percolation test is defined by the EHD as being between 36 and 42 inches <br />in depth; a satisfactory percolation rate for a shallow test is less than or equal to 60 minutes <br />per inch drop. The percolation test must demonstrate a satisfactory percolation rate within <br />the proposed septic system disposal field of each parcel to utilize a standard septic system. <br />Details of the percolation test is summarized in the Table 7: <br />Table 7. <br />Summary of Percolation Test – September 7, 2021 <br />Test No., <br />Date Tested <br />Percolation <br />Test <br />Depth <br />(inches) <br />Percolation <br />Rate <br />(minutes/inch) <br />Test <br />Duration <br />Comments <br />(See notes) <br />33503 S Koster Road <br />P-1 (shallow) 42 9.26 4-hour Satisfactory <br />Note: A satisfactory percolation rate for a “shallow” test is less than or equal to 60 minutes per inch and greater than or equal to 1 <br />minute per inch. <br />The soil within the percolation test area for 33503 S Koster Road demonstrated a satisfactory <br />percolation rate in accordance with the requirements of the EHD for the use of a standard <br />septic system. <br />9.0 SOIL SUITABILITY STUDY CONCLUSIONS <br />In summary, a percolation rate that meets the minimum EHD standards was achieved within <br />the proposed septic disposal area for the parcel located at 33503 S Koster Road; the soil <br />appears suitable for the use of a standard septic system. <br />10.0 LIMITATIONS <br />The conclusions of this report are established from the information provided regarding the <br />proposed and existing development and the site conditions as they existed at the time which <br />we excavated our test hole and performed the percolation test. It was assumed that the test <br />hole and percolation test result is representative of the subsurface conditions in the general <br />area. <br />If there is a substantial amount of time between the submission of this study and <br />commencement of work at the site, or if conditions have changed due to construction <br />activities or natural causes at or adjacent to the site, we recommend that our report be <br />reviewed to access the applicability of the recommendations and conclusions with <br />consideration regarding changed conditions and or lapse of time. This report should not <br />be used after 3 years without a review and update from our office.