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08/01/01 WED 18:17 FAX PHS/EHD Z002 File No. 20-3644-01 KLEINEELDER June 30, 1992 "The history of past uses in the project area to assess potential problems;" (C-4) : Reference is made to Plate I of this report which shows the location of the proposed subdivision. At the time of our field testing, the subdivision site had been recently disced. The site is surrounded by residential, ranchette-type development to the north, east and south. Commercial f„jeVmluyluell" are pieaa:nt adjacent to thm couthwast corner of the site and northwest of the site at Highway 99 and Eight Mile Road. On June 22, 1992 , a representative of our firm visited three residences located at the approximate locations indicated on Plate 1. The purpose of the visits was to obtain information on septic system use and problems with this method of sewage disposal. Residents questioned at the locations visited reported having no problems with the performance of their ccr.+ir ave+cmc . The rocidP.nt auestioned at location 2 indicated that they will be replacing their 16-year old system with a larger system in the near future. All three residents questioned indicated that their water was of "good" quality. The residence at location 1 is on the city water system, and the remaining two residences have private wells. our representative also performed a review of County septic cyotom permit recordc. The r?rnrde rin not indicate any recent permits for the older residences in the site area. However, one residence and a church located south of gttaahnick replaced an old septic tank and constructed a new septic system, respectively, in 1991. ITEM C-2' "The suitability of the soil for development utilizing septic systems;" On June 17, 1992 , representatives of our firm drilled and set-up one approximate 3-foot, one approximate S- to to-foot, and one approximate 15-foot deep percolation test hole on eight of the prcpu6ed twenty-four lots at the approximate locations indicated on Plate I. The test holes were drilled with a truck-mounted drill rig equipped with 6-inch diameter, continuous-flight augers. Perforated PVC pipe was inserted into the test holes to reduce disturbance when adding water. The day before the percolation tests were performed, our representative returned to the site and filled the test holes with relatively clean water and left them to soak overnight. On June 18, 19, and 22 , 1992 , our representative returned to the: aitc to perform tho poroolation toctc . Thrace lnrc panh Copyright 1992 Kleinfelder, Inc. Page 2 of 4