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June 23,2006 NOA Project Number: E05165B 6.2 Number of Percolation Tests One shallow percolation test was conducted on each parcel, for a total of six shallow percolation Ltests on the subject property. 6.3 Boring Preparation and Presaturation �. A total of six shallow soil borings were advanced on the Site with a hand augur on May 31, 2006. A 1.5-inch diameter PVC pipe with perforations on the bottom was used to measure the drop of c.," 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 24-hours before the percolation test. 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. 6.5 Percolation Test Procedure bm Percolation tests were conducted for the borings on June 1,2006 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 an hour was observed by Mr Ted Tasiopoulos, Senior Registered Environmental bm Health Inspector, EHD. Measurement of the water level during the percolation test was from a fixed reference point on the ` PVC casing using an electric soup r with an depth accuracy of 1/100th foot. All tabulated values on the field data shee (appendix) a in decimal feet. After water drop was observed, the holes were checked for re The re evel 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 between 36 and 42 inches in depth;a L 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 60 8 L L