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Aquatic Life Water Suitability. The evaluation of Seneca II-W spring waters for aquatic life suitability is based to a large extent on the condition of hardness. In short, the higher the value of hardness, the higher the value of the water quality standard for aquatic life and vice-versa for lower values of hardness (see Appendix 7-5 ). Appendix 7-5 is a copy of physical, biological, and inorganic material damage standards established by the CMLRD for aquatic life, and St defines many of the trace element standards like Cd, Cu, Pb, Ni, Ag, and Zn on the basis of hardness. Table 7-25 displays the name, number of sites with exceedences, and the frequency of exceedences for aquatic life standards. Three sites have exceedences for the Al standard. Four sites have exceedences for the Fe standard. Standards for Mn and Zn were exceeded at one site each. Exceedences for Hg, Ag, and H25 are considered suspect because of the asterisk designation, Ten sites show exceedences for NH3 standards. Three sites exceeded the 2000 mg/1 TDS standard, and one site exceeded the 15,000 mg/1 TDS standard. Based on the number of sites that exceed water quality standards for seven parameters (A1, Fe, Mn, NH3, Ag, TDS, and Zn), Seneca II-W spring waters are marginally suitable for certain types of aquatic life. • Irrigation Water Suitability. Table 7-26 shows the comparison of Seneca II-W spring sites and irrigation water quality standards. The standards for B, F, pH, 504, and the 5,000 mg/1 TDS level were exceeded at one site each. Exceedences for Hg are considered suspect because of the asterik designation. Evaluation of the spring water quality for the sodium and salinity hazard was performed using Figure 7-10. Figure 7-10 is a plot of the average conductivity (EC, umhos/cm) and sodium absorption ratio (SAR) values for spring sites (U.S. Salinity Laboratory, 1954). The spring water quality has a high salinity hazard and a low sodium hazard. Site 525 has an extremely high salinity hazard and is unsuitable for irrigation purposes. Based on the information presented in Table 7-26 and Figure 7-10, spring water at the Seneca II-W complex is marginally suitable for irrigation of tolerant and semi-tolerant crops. Livestock Water Suitability. The comparison of Seneca II-W spring water chemistry to standards for livestock water quality is shown in Table 7-27. Exceedences for the Cd standard is shown for two spring sites. The conductivity standard was exceeded at ten sites. Fluoride and Mn standards were exceeded at two sites. Iron dissolved, Fe total, • and Zn standards were exceeded at one site each. Exceedences for Mo are considered suspect because of the asterisk designation. The 750 mg/1 TDS standard was exceeded at 11 83