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Appendix C <br /> Page 65of67 <br /> Permit Nn.:COG5O000U <br /> 1 Adapted from Suarez(1981). <br /> ' Assumes a soil source of calcium from lime(CaCO3)or silicates;no precipitation of magnesium,and partial pressure Of CO2 <br /> near the soil surface(PCoz)isU.U0U7atmospheres. <br /> 3 [o°MCO3,[a are reported inmeq/|; ECisindS/m(deciSiemens per meter). <br /> Because values will not always be quantified at the exact EC or HCO,-/Ca° ratio in the table, the resulting Ca, must be <br /> determined based on the closest value to the calculated value. For example, for a calculated E[of2.45dS/n\ the column for <br /> the E[ofIO would beused. However, for a calculated EC of 5.1, the corresponding column for the EC of 6.0 would be used. <br /> Similarly,for aH[O3-/Ca°ratio ofI5.1,the row for the]O ratio would beused. <br /> The Division acknowledges that some effluents may have electrical conductivity levels that fall outside uf this table, and others <br /> have bicarbonate to calcium ratios that fall outside this table. For example,some data reflect HO]s-/Ca°ratios greater than 30 <br /> due to bicarbonate concentrations reported greater than 1000 mQ/| versus calcium concentrations generally|eo»than 10 mg/I <br /> (ie, corresponding toH[O3-/[a°ratios greater than lOO). Despite these high values exceeding the cha,t's boundaries, itis <br /> noted that the higher the H[O -/Ca°ratio, the greater the SAR'adj. Thus, using the Ca.values corresponding to the final row <br /> containing bicarbonate/calcium ratios of 30' the permiuee will actually calculate an SAR'adj that is |psa than the value <br /> calculated if additional rows reflecting HCO3-/Ca'+ratios of greater than 100 were added. <br /> 42. "Seven(7)day average" means,with the exception of fecal coliform or E coli bacteria(see geometric mean),the arithmetic <br /> mean of all samples collected ina seven(7)consecutive day period. Such seven(7)day averages shall be calculated for all <br /> calendar weeks,which are defined as beginning on Sunday and ending on Saturday. |f the calendar week overlaps two months <br /> (i.e.the Sunday is in one month and the Saturday in the following month),the seven(7)day average calculated for that calendar <br /> week shall be associated with the month that contains the Saturday. Samples may not be used for more than one(1)reporting <br /> period. (See the"Analytical and Sampling Methods for Monitoring and Reporting Section in Part|.D.3 for guidance on <br /> calculating averages and reporting analytical results that are less than the PQQ. <br /> 43. "Significant spills and leaks" include,but are not limited to, releases of oil or hazardous substances in excess of quantities that <br /> are reportable under CVVA Section 311(see 4O[FR110.6 and 40CFR117.2l)nr Section 1OZof the Comprehensive Environment <br /> al Response,Compensation and Liability Act(CERCLA),42 USC§9602.This permit does not relieve the permittee of the <br /> reporting requirements of 40 CFR 110,40 CFR 117,and 40 CFR 302 relating to spills or other releases of oils or hazardous <br /> substances. <br />