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IL February 24,2006 NOA Project Number: E05139B A 1.5-inch diameter PVC pipe with perforations on the bottom was used to measure the drop of L 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" Lwas then used to backfill in the annular space. Presaturation of the percolation test holes occurred on January 30,2006. The depth of water used to I pre-soak was 12 inches above the bottom of the boring. 6.4 Condition of Borings After Presaturation LAfter the 24-hour soak period,the presaturated holes were found to be intact and dry on February 1, 4 2006. ` 6.5 Percolation Test Procedure L Percolation tests were conducted for the borings on February 1,2006 in accordance with the requirements of the EHD. A percolation test with a duration of four hours was performed for each of the deep holes. The last half an hour was observed by Mr. Ted Tasiopoulos,Registered 1 Environmental Health Inspector, EHD.A percolation with a duration of one hour was performed L• for each of the shallow holes.The entirety of the one hour percolation test was observed by Mr.Ted Tasiopoulos, EHD. LMeasurement of the water level during the percolation test was from a fixed reference point on the i soon er with an depth accuracy of 1/100th foot. All tabulated PVC casing using an electric well values on the field data sheet (appendix) 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 L four hours for the four hour test, and readings were taken every ten minutes for a period of one hour for the one hour test. L6.6 Percolation Test Forms and Results The completed percolation test forms are included in the appendix of this report. i L. A shallow percolation testis 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 less than or equal to 30 minutes per inch drop. 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 summarizellm Table 4. J 6w 8 L '4044 L