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3.6 Discussion of general area septic tank repair history: The repair history of the septic tank in this area reveal that the leech lines and seepage pits have resulted in consistent unerring performance. There are no incidents to report. (See Appendix) 3.7 Description of proposed or expected maximum (including second unit dwellings) septic tank usage on site: There are no immediate plans for construction. However, each proposed parcel is entitled to a primary residence and a second unit dwelling if the rezone is granted. Any new septic systems must be constructed under permit. If rezoning is granted,the existing parcel could be divided into seven 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 80 feet according to the map of"Lines of Equal Depth to Groundwater" published by the "San Joaquin County Flood and Water Conservation District" Groundwater Report Fall 2017. 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 moderate 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: A water sample was taken from a well head spigot from the existing well of the subject parcel, located at 9382 E. State Highway 12, Lodi, California on November 14, 2019 by Joel Montano of Dillon&Murphy. 4.4. Description of constituents being tested for in the water sample: The samples are being tested for nitrates and DBCP. 4.5 Description of how sample was obtained,handled,stored, and transported to the lab: The water sample was taken from a well head spigot from the existing well located at 9382 E. State Highway 12,Lodi, California. The sample was taken by Joel Montano of Dillon & Murphy, and driven directly to Precision-Enviro Tech. The sample was 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