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i August 31, 2006 NOA Project Number: E06091A F! 6.3 Boring Preparation and Presaturation The soil borings on the site were advanced in an all-terrain-mounted deep rock auger rig on August FJ 9,2006. A 1.5-inch diameter PVC pipe with perforations on the bottom was used to measure the drop of water in the percolation test boxing. Approximately 2 inches of"pea gravel' were placed in the i bottom of the open soil boring, then the PVC pipe was installed on top of the gravel. "Pea gravel" was used to backfill in the annular space. Presatutation of the percolation test holes occurred approximately 24 hours.prior to the percolation 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 IF1 After the 24-hour soak period, the presaturated holes were found to be intact and dry on August 10, b E 2006. Fi6.5 Percolation Test Procedure Percolation tests were conducted for the borings on August 10, 2006 in accordance with the requirements of the EHD. A percolation test with a duration of four hours was performed for each hole. The last half hour of the 4-hour percolation was observed by Mr. Michael Escotto, Registered Environmental Health Inspector. Measurement of the water level during the percolation test was from a fixed reference point on the n PVC casing using an electric well sounder with an depth accuracy of 1/100th foot. All tabulated f 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 fvere taken approximately every 30 minutes F1for a period of four hours. 6.6 Percolation Test Forms and Results ' The d ete coinp lpercolation test form is included in thea appendix of this report. pp P A shallow percolation test is defined by the EHD as being between 36 and 42 inches in depth; a Isatisfactory 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 1 Jpercolation rate within the proposed septic system disposal field of each parcel to be suitable for a standard septic system. Details of the percolation tests are summarized in Table 4. S