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3.7 Description of proposed or expected maximum (including second unit dwellings) septic tank usage on site: As mentioned previously, if the General Plan Amendment and Zone Reclassification were granted, construction could commence for a gas station, convenience store and a coffee shop. Septic tanks and leach lines(with seepage pits) will be designed in accordance with San Joaquin County Environmental Health's Standards. Any new septic systems must be constructed under a permit. 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 65-75 feet according to the map of "Lines of Equal Depth to Groundwater" published Spring, 2018, by the San Joaquin County Flood 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 are deemed low due to the depths involved. Insecticides, pesticides, and fertilizers typically do not significantly impact groundwater at these depths. However, as with any agricultural area, there is always a potential for contamination due to chemicals used in the farming operation. 4.3 Description of location (address/APN), type and construction of well and location (well head/kitchen tap) where water sample(s) were obtained: No samples were taken due to no available water on site. 4.4. Description of constituents being tested for in the water sample: No water on site to be sampled. 4.5 Description of how sample was obtained, handled, stored, and transported to the lab: No water on site to be sampled. 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: There is not a complete chain of custody located in the Appendix due to no water samples being tested. 5.0 SOIL PROFILE INFORMATION SECTION 5.1 Site map showing the location, with dimensions, of the soil profiled pit on the parcel. See Appendix. 5.2 Description of soil profile pit including depth and dimensions. The shallow test hole was prepared per County Standards. The hole was excavated to a depth of 42 inches and 8 inches in diameter. The holes were backfilled with 2 inches of "pea gravel". 5.3 Description of soil lithology as noted from test pit by appropriate professional using industry standard protocol. The Soil in this area is classified as San Joaquin -Urban land complex as stated in the Soil Survey of San Joaquin County, as provided by the United States Department of Agriculture, Soil Conservation Service. 2