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I `tom I <br /> pC25�;ee� �pflouka <br /> October 21, 2005 <br /> Project Number 88.05 <br /> OCT 2 4 2005 <br /> FOR: Mr. &Mrs. Bruce and Dana Russell ENVIRONMENT HEALTH <br /> 28700 East Via Casilina PERN71T/SERVICES <br /> Escalon, CA 95320 <br /> (209) 608-1121 <br /> PROJECT: Lot 40, A.P.N. 187-400-33 <br /> 28700 East Via Casilina <br /> Escalon, CA <br /> SUBJECT: Percolation Testing for a Residential Septic System <br /> INTRODUCTION <br /> Chesney Consulting has been retained by Mr. Bruce Russell to conduct percolation testing at the <br /> Russell's future residence, located in the Brookland Farms Antiquated Subdivision Development. <br /> The property consists of a ten-acre Parcel, with their home is being constructed in the northwest <br /> corner of this Parcel. <br /> It is my understanding that percolation testing had been previously conducted on this Parcel, <br /> however, in a location several hundred feet from the proposed location of the septic system <br /> disposal area. The policy of the San Joaquin County Environmental Health Department(EHD) is <br /> for the installation of a septic system leachfield to be within 100 feet of the percolation tests <br /> conducted for any given leachfield. <br /> The percolation test locations and subsequent disposal area for the Russell's home are denoted on <br /> the attached residential Site Plan. Acceptable percolation in the deeper soils was achieved, while <br /> virtually nonexistent permeability was observed in the shallow soils. <br /> SUBSURFACE SOIL STRUCTURE <br /> A Mobile Drill B-24 truck-mounted drill rig was used to drill the percolation test borings in the <br /> future effluent disposal area, and to retrieve soil samples from auger cuttings. A field log-of- <br /> boring was made for the deep test, which is found in Appendix C. Soil characteristics are <br /> described using the Unified Soil Classification System (USCS). As denoted on the log of boring, <br /> the surface soil characteristics underlying the disposal area reveal the soil to be predominately <br /> lean clay containing a fine sand,with an underlying cemented silts hardpan and claypan. These <br /> soils are impermeable at the shallow perc test depth representative of leachlines. <br /> Page-1- <br /> T.. O. Bax 3794 ♦ Turlock C4 95381 4 Office(209)668-1403 ♦ Tax(209)668-2598 <br />