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r� 3.6 Discussion of General Area Septic Tank Repair History: The septic systems in this area have experienced normal longevity. General repairs, including adding additional leach lines, have occurred in the vicinity. 3.7 Description of Proposed or Expected Maximum (including second unit dwellings) septic tank usage on site. The homesite will have only a primary residence, no second unit dwelling is planned. Thus, only the existing septic system is anticipated at this time. 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 120 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 cast 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 of groundwater involved. Insecticides,pesticides, and fertilizers typically do not impact groundwater at these depths, however, as with any area, there ., is always potential for contamination due to chemicals. 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 southeast comer of the existing home located at 27403 E. State Route 4 on June 20, 2007 by Alex Colla of Dillon&Murphy. 4.4 Description of constituents being tested for in the water sample: The water samples are being tested for nitrates and DBCP. (See Appendix for results.) 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 site located at 27403 E. State Route 4. The samples were taken by Alex Colla 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. 2 ` 0029TSoil Report 072007