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Ratto, Sarale and Del Carlo Property Page 7 of 9 Our Project Number: LGS080506 May 30, 2008 6.3 Boring Preparation and Presaturation One (1) shallow soil boring was advanced on each parcel with a hand auger on May 8, 2008. 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" was placed in the bottom of the open soil boring, the PVC pipe was then installed on top of the gravel. "Pea gravel"was then used to backfill in the annular space. Presaturation of the percolation test holes occurred approximately 24 hours prior to the day of testing. The depth of water used to pre-soak was 12 inches above the bottom of the boring. 6.4 Condition of Borings after Presaturation After the 24-hour soak period, the presaturated holes were found to be intact and dry on the day of testing. 6.5 Percolation Test Procedure Percolation tests were conducted for the borings on May 9, 2008 in accordance with the requirements of the EHD. A percolation test with a duration of four (4) hours was performed for the test. The last half an hour of the test was observed by Ted Tasiopoulos, Inspector with the 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 a depth accuracy of 1/100th foot. All ; tabulated values on the field data sheet are in decimal feet. After water drop was 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 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 betw n 36 and"42inhes in depth; a satisfactory percolation rate for a shallow test is less than or e to 6per inch drop. A deep percolation test is defined as -"g between 3.5 and 25 eet in depth; a satisfactory percolation rate for a deep test is 30 min/,n or less. ( ne perco ation test must demonstrate a satisfactory percolation rate within thepy'posed septic system disposal field of each parcel to utilize a standard septic system. Details of the percolation tests are summarized in the table to follow. "44 902 Industrial Way•Lodi,CA 95240•209.367.3701 •Fax 209.369.4228 ©2008 Neil O.Anderson&Associates,Inc