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'., Hieb Family 1990 Trust Pro,"qty Page 8 of 11 Our Project Number: E071S_ December 17, 2007 6.3 Boring Preparation and Presaturation i One (1) shallow and one (1) deep soil boring were advanced on parcel iwith atruck-mounted ' deep rock augur rig on December 13, 2007. i A 1.5-inch diameter PVC pipe with perforations on the bottom was used to measure the drop of water in the percolation test boring. Approximately 2 inches of"pea gravel"were placed in the bottom of the open soil boring, then the PVC pipe was installed on top of the gravel. "Pea gravel"was then used to backfill in the annular space. Presaturation of the percolation test holes occurred on December 13, 2007. The depth of water t used to pre-soak was 12 inches above the bottom of the boring. 6.4 Condition of Borings After Presaturation After the 24-hour soakp eriod, the presaturated holes were found to be intact on December 14, 2007. The shallow hole was found to be dry, while the deep hole was found to still have water 'd Fiin the hole from presaturation on the day of testing. 6.5 Percolation Test Procedure F1 Percolation tests were conducted for the borings on December 14, 2007 in accordance with the requirements of the EHD. A percolation tests with a duration of four (4) hours was performed for each hole. The last half an hour of each test was observed by Michael Escotto, Registered Environmental Health Specialist, EHD. Measurement of the water level during the percolation test was from a fixed reference point on the PVC casing using an electric well sounder with an depth accuracy of 1/100th foot. All tabulated values on the field data sheet (appendix) are in decimal feet. After water drop was F1 observed, the holes were checked for refill. The refill level was approximately 0.5 ft (6 inches) - of water above the bottom level of the percolation test hole. The readings were taken every 30 minutes for a period of four. (4) hours. 6.6 Percolation Test Forms and Results The completed percolation test form is included in the appendix of this report. A shallow percolation test is defined by the EHD as being between 36 and 42 inches in depth; a satisfactory percolation rate for a shallow test is less than or equal to 60 minutes per inch drop. A deep percolation test is defined as being between 3.5 and 25 feet in depth; a satisfactory percolation rate for a deep test is 30 min/in or less. One percolation test must demonstrate a satisfactory percolation rate within the proposed septic system disposal field of each parcel to _._ utilize a standard septic system. Details of the percolation tests are summarized in the table below. P P "044 0 902 Industrial Way-Lodi,CA 95240.209.367.3701 •Fax 209.369.4228 ©2007 Neil 0.Anderson&Associates,Inc