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E <br />C� <br />4.4.3 Ground -Water Quality <br />Ground water in the eastern portion of San Joaquin County is generally of excel- <br />lent quality with low total dissolved solids (TDS) ranging from 120 to 550 parts <br />per million (ppm) and averaging 200 ppm. J.H. Kleinfelder and Associates, in <br />conducting geotechnical investigations of this site (1986) and also of the half <br />section immediately to the west (1980), sampled two water wells (W-1 and W-2) <br />on the proposed landfill site as well as the Thomas and Zarala wells (Wells 6 and <br />19). A ground -water sample from Test Boring TW -1 drilled in the extreme south- <br />west corner of Section 21 (Arizuren property) in October 1980 were also col- <br />lected. The analytical results are presented in Appendix A. Results indicate that <br />water from domestic and irrigation wells on and adjacent to the proposed landfill <br />site is within the standards for drinking water as set by the U.S. Public Health <br />Service (see Appendix A). <br />Ground -water quality at the proposed landfill site was also characterized by ana- <br />lyzing samples from the recently installed Monitoring Wells G-1, G-2, and G-3 <br />installed by EMCON Associates. To establish baseline ground -water quality data <br />for the site, EMCON Associates analyzed these samples for the following <br />parameters: <br />Em <br />• Electrical conductivity <br />• Total dissolved solids (TDS) <br />• Total organic carbon (TOC) <br />• Alkalinity <br />• Phenols <br />• Nitrate <br />• Chloride <br />• Total Kjeldahl nitrogen (TKN) <br />• Phosphate <br />• Volatile organics (EPA Method 624) <br />PJ9 <br />.,1, 11 32 Rev. 1 July 20, 1989 <br />