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3.6 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 been repaired or expanded. This is based on the fact that repair applications have been applied for. 3.7 Description of Proposed or Expected Maximum (including second unit dwellings) septic tank usage on site. The existing parcel has a primary residence, no second unit dwelling is planned. However, the conversion of the existing pool house will create the need to add a septic system. 4.0 GROUNDWATER INFORMATION SECTION: 4.1 Description of the depth and gradient of groundwater in the general area: The depth to ground water in this area is approximately 90 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. 4.2 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. 4.3 Description of location, type and construction of well and location where water sample(s) were obtained: Water samples were taken from a spigot at the well located at 28001 N. Nichols Road on December 4, 2008 by Mike Toy of Dillon&Murphy. 4.4 Description of constituents being tested for in the water sample: The water samples were being tested for nitrates and DBCP. Nitrate results were 2.22 mg/L and DBCP was non-detected (ND)4/ 4.5 Description of how sample was obtained, handled, stored, and transported to the lab: The water samples were obtained from the spigot at the well located at 28001 N. Nichols Road. The samples were taken by Mike Toy of Dillon &Murphy and driven directly 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. 4.6 Complete Chain of Custody document, including printed and signed name of third 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. 5.0 SOIL PROFILE INFORMATION SECTION: 5.1 Site map showing location, with dimensions, of the soil profile pit on the parcel: See Appendix. 2 cA085%Soil Report 1208