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3.5 General area septic permit history (number/types/dates of permits, age of system, permit numbers, copies in report): In searching permits for septic systems in San Joaquin County Environmental Health Department records, the septic systems in this general area range in installation dates from 1975 to 2019. (Copies of permits are in index.) 3.6 Discussion of general area septic tank repair history: Repair history of the septic tanks in this area reveal that the leach lines and seepage pits have resulted in consistent unerring performance. There are been no incidents to report(See Appendix). 3.7 Description of proposed or expected maximum (including second unit dwellings) septic tank usage on site: Currently the modular office and welding shop are the only 2 buildings that use the septic tank. These two buildings will be the only two buildings to use the septic system. The parcel is also entitled to a primary residence and a second unit dwelling. Any new septic systems must be constructed under permit. There are no imminent plans for any residences. 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 110 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 1123 N. Jack Tone Road, Stockton, California on November 25, 2019 by Joel Montano of Dillon& Murphy. 4.4. Description of constituents being tested for in the water sample: The water sample is 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 obtained from a well head spigot at the existing well located at 1123 N. Jack Tone Road, Stockton, 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