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KLEINFELDER The current proposed processing facility will have two bathrooms, both dual use, with one in the office and one used in the processing area. Each facility will have a sink and toilet. No shower facilities or garbage disposals are planned. There will be one dish washer in a small laboratory along with one sink. PRESENT / PAST USE OF THE SITE/EXISTING AND PROPOSED SEPTIC TANK USAGE This particular area of San Joaquin County is known to be blanketed with "hardpan" soils to considerable depths. There are very few residences in the vicinity of the proposed Mokelumne Rim Vineyards, and we understand that the owner is unaware of neighbors who might have problems with their septic systems. Based on performance of the shallow percolation tests attempted by our firm, however, we would anticipate a limited capacity of a conventional or shallow leach field. The current site is occupied y vineyard. GROUNDWATER DEPTH AND TESTING There is an existing well at the site located approximately 100 feet from Peltier Road and 200 feet from Kennefick Road. We have been furnished with the analytical results on a water sample_ from this well prepared by Denele Agricultural Laboratories in Patterson California. The results indicate a nitrate as Nitrogen of 3.9 milligrams per liter (mg/1). A copy of those results are —attached According to the "Lines of Equal Depth to Groundwater" published in the spring of 1999 (most recent edition) by the San Joaquin County Flood Control and Water Conservation District, the depth to groundwater at this location is between 70 to 80 feet. PERCOLATION TESTS Three separate attempts were made to perform percolation tests at the site. On May 24, 2001, a percolation test was set up at the bottom of a shallow test pit. The test pit was approximately 2 feet deep and the actual percolation hole was 12 inches deep and 6 inches in diameter. The soil conditions encountered in the test hole and in the test pit itself consisted of a reddish-brown clayey sand, which was partially cemented. These materials are known locally as hardpan. There was still water in thehe to a following the overnight saturation period andnodroop in water level was measured during the first 30 minute time period-of-the . At this point, the inspection scheduled with San Joaquin o�unty Public Health Services Department Environmental Health Division (PHS/EHD) was Cance led and the owner was requested to prepare additional percolation test sites in hopes of finding more favorable soil conditions. On June 8, 2001, a second test was performed in a test pit approximately 32 inches below grade. e o� re,another 12 inch deep percolation hole 6 inc es diameter was installed at the bottom 0 is test pit._I tie test was pertofTned overt the period of 4 hours and a passing; perco ation rate of minu es per inch was measured. However, it was clear to our representative, as well as to the sanitarian from San Joaquin County (SJC), that the bottom of the test pit had been disturbed. In, other words, as water migrated out of the test hole the entire base of the test pit became saturated and unstable. Fort is reason," eipeation test was ruled invalid by SJC._ On June 19, 2001, a 204600-01/2011 L647 Page 2 of 5 Copyright 2001 Kleinfelder,Inc. October 2,2001