SU0007646 SSNL - Laserfiche WebLink

Home Browse Search

r�- (§5.2, 5.3, and 5.4) Logs of Boring using the Unified Soil Classification System (USCS), as observed from the perc test borings completed on each of the six proposed Parcels is found on each EHD PERCOLATION TEST DATA SHEET. Generally,the underlying soils show an organic soil from the surface down to three inches, a dark brown clay with very fine sand down to 2 feet, and then progressing to a tan, fine sandy silt, clayey silt down to 36-42 inches. No cemented silts hardpan/plowpan was encountered in any of the test borings. (§6.1) Percolation testing was conducted in the locations as illustrated on the Tentative Map found iii Appcndix 3. The test sites are near Kasson Road for Lots 1 and 2, and the southern property border for Lots 3, 4, 5, and 6. These are the most logical locations for any future residential development. The following information describes the preparation of the percolation test borings and the actual percolation testing: e-_ ("- (§ 6.2,6.3 and 6.5) On April 30, 2010, 1100 hrs, one shallow perc test boring of between 36 and 42 inches was drilled on Lots 1 through 6. These shallow tests represent the typical depth for leachlines. Deeper testing was not done, which would have been representative of sumps and/or seepage pits due to the shallow groundwater in this locale. The sidewalls of each shallow boring was scored with a pry-bar and the loose material removed. Two inches of fine gravel was placed at'the bottom and three-inch perforated PVC pipe was inserted in each of the eight test borings. On May 2, 2010, 1030 hrs, each of the six test borings were presaturated again with 12 inches of water, -24 hrs before testing. (§ 6.4) Un May 3, 2010, 0700 hrs,percolation testing commenced for the shallow test borings on all six proposed Parcels. There was no standing water after the 24-hour soak period in any of the test borings, as illustrated in Table 1 below. Consequently, EHD Pere Test Procedure#2 was conducted. The last half hour of all the tests was witnessed b ed Tasiopoulos, R.E.H.S. the Environmental Health Department. The maximum acceptable pesOiTilinorlis avow pert tests and the minimum acceptable pert rate is 5 min/in. Consequently, all six perc tests for the subject Parcels possess acceptable percolation, in the specific location of testing. �.. (§ 5.4 and 6.8) The following Table illustrates the proposed Parcel number, septic system structure to be installed based on the depth of the passing perc rate, proposed acreage, post soak. period status and pert test results for the respective perc test: Page -4- Chesney Consulting