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May 25,2001 <br /> Job Number:LGOl-115 <br /> Page 7 <br /> medium sandy lean clay is present throughout the site. Based on the clayey soil matrix,this soil <br /> does not exhibit good potential for percolation. No identifiable sandy zones were found. Some <br /> exploratory borings and preliminary percolation testing was conducted on Parcels 2, 4, 5, and 6, <br /> however no soil was encountered which indicated good percolation characteristics for siting the <br /> septic fields. It was decided to test the shallow soils toward the south sides of the 2-acre parcels <br /> and the 110 acre parcel. An engineered system could be used on parcels to mitigate any poor <br /> results not satisfying the County's requirements. <br /> Twelve(12) shallow percolation tests were conducted at the site, two (2)tests per parcel. <br /> — The percolation test borings were set about 8-12 feet apart near the south portion of each parcel. <br /> The soil boring and percolation test was drilled utilizing a 6-inch diameter hollow stem auger. <br /> The holes were scarified to remove any smearing of clay caused from rotary drilling. The casing <br /> used for the test was 2-inch diameter PVC pipe with an open end on the top and bottom. <br /> Perforations were made on approximately the last 12 inches of the casing. Two (2) inches of <br /> _ "pea gravel"was placed in the bottom of the hole, the casing was installed, and one(1) foot of <br /> "pea gravel"was backfilled in the annular space. The percolation test borings were pre-soaked <br /> 24-hours prior to the test. <br /> A four(4)hour percolation test was conducted for each location. Each test was conducted <br /> on May 8, 2001 in accordance with the requirements of San Joaquin County Environmental <br /> Health Division. The last hour of the percolation tests were observed by Mr.Ted Norgard <br /> Environmental Health Specialist of the San Joaquin County Environmental Health Division. The <br /> following table presents a summary of the percolation test. <br /> r <br /> r. <br /> Z,j�r <br />