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1 ' 3.7 Description of Proposed or Expected Maximum (including second unit dwellings) septic tank usage on site: Each parcel is entitled to a primary residence and a second unit ' dwelling. Any new 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 140 feet according to the map of"Lines of Equal Depth ' to Groundwater" published Spring, 2015, 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 moderate due to the depths involved. Types of activity in the ' area include crop fertilization, pesticides and other chemicals used to protect the vineyards. 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: Water samples were taken from a spigot at the domestic well located on the subject property on July 28, 2016, by Mike Toy 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. ' 4.5 Description of How Sample was Obtained, Handled, Stored, and Transported to the ' Lab: The water samples were obtained from a spigot at the domestic well located at 19099 Mehrten Road. The samples were taken by Mike Toy 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 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 10 inches in diameter. The hole was backfilled with 2 inches of"pea gravel." ' 2 1