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Soil Suitability Study 33233 S. Koster Rd., Tracy, CA page q groundwater was measured in Well No. 1 and in Well No. 2 prior to setting the well pumps in the wells. Those depths were measured in the year 2000 and 2001, respectively. The groundwater gradient in the area is to the northeast heading towards the San Joaquin River. Section 4.2 Description/Discussion of Any Existiniz and/or Potential Groundwater Contamination Issues in the General Location of the Site A Subsurface Contamination Report was prepared for the subject property in October 2010. At that time no potential sources of soil or groundwater contamination were identified at or near the subject site. A copy of the report, which was previously submitted to San Joaquin County Environmental Health Department under service request No. SR0061281 is attached (see Appendix). Section 4.3 Description of Location Type and Construction of Wells The location of flip well (Well No. 1) that existed on the site in 2000 is shown on the Tentative Parcel Map (Figure 1) and is designated as an irrigation well. That well is 100 feet deep and has a steel well casing. A 1%z HP submersible pump is located in this well, which is used for irrigation of the grapes and trees located on Parcel 1 of the property. No well log is available for this well. A second well (Well No. 2), the location of which is also shown on Figure 1, was drilled in 2001 and is designated as a domestic potable water supply well. A copy of the well log is attached (see Figure 2). Section 4.4 Descrintion of Constituents Beina Tested for in The Water Samples The water samples taken from the well head were analyzed for: _ Nitrates Total Dissolved Solids Total Hardness as Calcium Carbonate The results are presented below. _ Well No. 1 Nitrates Total Dissolved Solids 775 mg/L Hardness as Calcium Carbonate 317 mg/L Well No 2 Nitrates l l'f�g/h — Total Dissolved Solids 490 mg/L Hardness as Calcium Carbonate 215 mg/L