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3.6 Discussion of General Area Septic Tank Repair History: Repair history of the / /I <br /> septic tanks in this area reveals that the leach lines and seepage pits have resulted J <br /> in consistent performance. (See Appendix.) <br /> 3.7 Description of Proposed or Expected Maximum (including second unit <br /> dwellings) septic tank usage on site. Located on the subject parcel is an existing <br /> house, and pool house. There are no immediate plans for any more dwellings. <br /> However each parcel is allowed a primary residence and a second unit dwelling so <br /> there could potentially be four septic tanks. <br /> 4.0 GROUNDWATER INFORMATION SECTION: <br /> 4.1 Description of the depth and gradient of groundwater in the general area: The <br /> _ depth to ground water in this area is approximately 120 feet according to the map <br /> of "Lines of Equal Depth to Groundwater" published Spring, 1999, by the San <br /> Joaquin County Flood Control and Water Conservation District. The gradient <br /> descends from east to west. <br /> 4.2 Description/Discussion of any existing and/or potential groundwater <br /> — contamination issues in the general location of the site: The concerns for <br /> groundwater contamination in this area are deemed low due to the depths involved. <br /> _ Insecticides, pesticides, and fertilizers typically do not impact groundwater at these <br /> depths, however, as with any agricultural area, there is always potential for <br /> contamination due to chemicals used in the farming operation. <br /> 4.3 Description of location, type and construction of well and location where water <br /> sample(s) were obtained: The onsite well is a submersible pump. Water samples Y �� <br /> were taken from a spigot at the house located at 12744 Jack Tone Road, on May <br /> 8, 2008 by Jake Handel of Dillon & Murphy. <br /> 4.4 Description of constituents being tested for in the water sample: The water <br /> samples are being tested for nitrates and DBCP. <br /> 4.5 Description of how sample was obtained, handled, stored, and transported to the <br /> lab: The water samples were obtained from the spigot at the house located at 12744 <br /> Jack Tone Road. The samples were taken by Jake Handel of Dillon & Murphy and <br /> driven directly to Precision Enviro-Tech. The samples were taken and handled in <br /> accordance with Precision Enviro-Tech requirements. The results from the test can <br /> be found in the Appendix. <br /> 2 <br /> cA05132Soil Suitability Report 042008 <br />