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j y I1 # 1 3.7 Description of Proposed or Expected Maximum (including second unit dwellings) septic tank usage on site. The two parcels will have only primary residences, no second unit dwellings are planned, thus only one septic system per parcel is anticipated at this time. 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 gradient of groundwater in the general area: The depth to ground water in this area is approximately 115 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. f 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 ` urea are deemed high due to the high level of nitrates found in the tested sample. 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 domestic well located at 14701 E. Copperopolis Road on April 29, 2005 by Louie Mendez 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. The results for dibromochloropropane (DBCP) were non- detected and the results for nitrates were 48.5 mg/L. Any homeowner should be notified of these elevated levels of nitrates. Filters may need to be installed on the existing and future wells. 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 domestic well located at 14701 E. Copperopolis Road. The well consists of a submersible 3 hp pump set at a depth of 182' j. according to the most recent well/pump permit (see appendix). The samples were taken by Louie Mendez 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