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X3.6 Discussion of General Area Septic Tank Repair History: Repair history of the septic tanks in this area reveals that the leach lines and seepage pits have resulted in consistent unerring performance. This is based on the fact that no septic system repair application has been applied for. Additional leaching lines were added to the adjacent parcels existing septic system. �3.7 Description of Proposed or Expected Maximum (including second unit dwellings) septic tank usage on site. The two proposed subject parcels are going to continually be used for 7 agricultural purposes at this time. Thus there are no immediate plans for installing a septic system. Per County ordinances, each parcel on this map is entitled to one primary residence and one second unit dwelling. Therefore this project could ultimately have 4 homes on the two proposed parcels. ,/4.0 GROUNDWATER INFORMATION SECTION: .. ✓ 4.1 Description of the depth and gradie t of groundwater in the general area: The depth to ground water in this area is approximate1140 feet according to the map of"Lines of Equal Depth to Groundwater" published Spring, 1999, by the San Joaquin County Flood Control and Water Conservation District. The gradient descends from east to west. a p, X4.2 Description/Discussion of any existing and/or potential groundwater contamination _ issues in the general location of the site: The concerns for groundwater contamination in this area is deemed low due to the depths involved. Insecticides, pesticides, and fertilizers typically do not impact groundwater at these depths, however, as with any agricultural area, there is always potential for contamination due to chemicals used in the farming operation. X4.3 Description of location,type and construction of well and location where water _ sample(s) were obtained: Water samples were taken from a spigot on a domestic well located at 8000 N�desta Lane on January 25, 2006 by Jake Handel of Dillon & Murphy. The water samples were obtained at this location due to the fact there are no outlets for water on the project site. The sam le ' e is adiacPnt to the project site.7%? x/4.4 Description of constituents being tested for in the water sample: The water samples are being tested for nitrates and DBCP. The results for dibromochloropropane (DBCP)were 0.03 ug/L and the results for nitrates were also 4.69 mg/L. (A complete set of results can be found in the Appendix.) l,�4.5 Description of how sample was obtained, handled, stored, and transported to the lab: y5 The water samples were obtained from the spigot at the domestic well at 8000 N. Podesta Lane. The samples were taken by Jake Handel of Dillon&Murphy, and driven to Precision Enviro- Tech. The samples were taken and handled in accordance with Precision Enviro-Tech requirements. The results from the test can be found in the Appendix. A--4.6 Complete Chain of Custody document, including printed and signed name of third G party sampler, condition of sample and date and time the sample was submitted to the lab. For Laboratory samplers, complete laboratory report to include the above noted information: The complete chain of custody document is located in the Appendix. 2 e-\0511\Snil Rennrt