Laserfiche WebLink
L <br /> LFebruary 21,2007 <br /> NOA Project Number. E07015A <br /> `_ bottom of the open soil boring, then the PVC pipe was installed on top of the gravel. 'Tea gravel' <br /> was then used to backfill in the annular space. <br /> 6. Presaturation of the percolation test hole occurred 24 hours before each percolation test. The depth <br /> of water used to pre-soak was 12 inches above the bottom of the boring. <br /> L 6.4 Condition of Borings After Presaturation <br /> L After the 24-hour soak period, the presaturated hole was found to be intact and dry on January 26, <br /> 2007. <br /> L 6.5 Percolation Test Procedure <br /> A percolation test was conducted for the boring on January 26,2007 in accordance with the <br /> requirements of the EHD. A percolation test with a duration of four hours was performed.The last <br /> Lhalf hour of the 4-hour percolation test was observed by Ms. Amanda Borden,EHD. <br /> L Measurement of the water level during the percolation test was from a fixed reference point on the <br /> PVC casing using an electric well sounder with an depth accuracy of 1/100th foot. All tabulated <br /> values on the field data sheet (appendix) are in decimal feet After water drop was observed, the <br /> L holes were checked for refill. The refill level was approximately 0.5 ft (6 inches) of water above the <br /> bottom level of the percolation test hole. The readings were taken every 30 minutes for a period of <br /> four hours. <br /> L, 6.6 Percolation Test Forms and Results <br /> LThe completed percolation test form is included in the appendix of this report. <br /> A shallow percolation test is defined by the EHD as being between 36 and 42 inches in depth;a <br /> satisfactory percolation rate for a shallow test is less than or equal to 60 minutes per inch drop. A <br /> L deep percolation test is defined as being between 3.5 and 25 feet in depth; a satisfactory percolation <br /> rate for a deep test is less than or equal to 30 minutes per inch drop. One percolation test must <br /> demonstrate a satisfactory percolation rate within the proposed septic system disposal field of each <br /> Lparcel to utilize a standard septic system. Details of the percolation tests are summarized in Table 5. <br /> Table 5. <br /> Summary of Percolation Tests. <br /> Test No., Percolation Percolation Rate Test Comment <br /> Date Tested Test Depth(ft) (minutes/inch) Duration (see notes) <br /> Shallow 3.35 4.50 4 hr. Satisfactory Percolation Rate <br /> 1-76-07 <br /> Note: A satisfactory percolation rate for a"shallow" test is less than or equal to 60 minutes per inch. A <br /> satisfactory percolation rate for a"deep"test is less than or equal to 30 minutes per inch. <br /> 7 <br />