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Appendix C <br /> Page 64 of 67 <br /> Permit No.:COG500000 <br /> 38. "Qualified Personnel" for stormwater provisions-those who possess the knowledge and skills to assess conditions and <br /> activities that could impact stormwater quality at a facility,and who can also evaluate the effectiveness of control measures. <br /> 39. "Quarterly measurement frequency" means samples may be collected at any time during the calendar quarter if a continual <br /> discharge occurs. If the discharge is intermittent,then samples shall be collected during the period that discharge occurs. <br /> 40. "Recorder" requires the continuous operation of an automatic data retention device for providing required records such as a <br /> data logger,a chart and/or totalizer(or drinking water rotor meters or pump hour meters where previously approved.) <br /> 41. SAR and Adjusted SAR-The equation for calculation of SAR-adj is: <br /> SAR-adj= <br /> Na+ <br /> Ca, + Mg++ <br /> 2 <br /> Where: <br /> Na+=Sodium in the effluent reported in meq/1 <br /> Mg`=Magnesium in the effluent reported in meq/1 <br /> Cax=calcium (in meq/1)in the effluent modified due to the ratio of bicarbonate to calcium <br /> The values for sodium(Na+),calcium(Ca++), bicarbonate(HCO3-)and magnesium(Mg++)in this equation are expressed in units <br /> of milliequivalents per liter(meq/1). Generally,data for these parameters are reported in terms of mg/l,which must then be <br /> converted to calculate the SAR. The conversions are: <br /> meq/I= Concentraffon in mg/l <br /> Equivalent weight in mg l meq <br /> Where the equivalent weights are determined based on the atomic weight of the element divided by the ion's charge: <br /> Na+=23.0 mg/meq(atomic weight of 23,charge of 1) <br /> Ca++=20.0 mg/meq(atomic weight of 40.078,charge of 2) <br /> Mg++=12.15 mg/meq(atomic weight of 24.3,charge of 2) <br /> HCO3-=61 mg/mep(atomic weight of 61,charge of 1) <br /> The EC and the HCO3-/Ca++ratio in the effluent(calculated by dividing the HCO3-in meq/1 by the Ca"in meq/1)are used to <br /> determine the Cax using the following table. <br /> Table-Modified Calcium Determination for Adjusted Sodium Adsorption Ratio <br /> HCO3/Ca Ratio And EC 1,1,3 <br /> Salinity of Effluent(EC)(dS/m) <br /> 0.1 0.2 0.3 0.5 0.7 1.0 1.5 I 2.0 F 3.0 4.0 6.0 8.0 <br /> -.05 13.20 13.61 13.92 lu -14.40T 14.79�Y 15.26 i- 15.91: -16.431 17.28 17.97 19.071 19.94 <br /> 10 8.31 8.571 --8.77 ® 9.071 <br /> 9.31( -9.62 10.02, 10.35 j 10.89 11.321 12.011 12.56 <br /> 15� 6.34 6.54� 6.69� 6.92� 7.111 -7.34 7.65 7.90� 8.31� 8.64� 9.17! 9.58 <br /> ... ..__ ..r ...._.__ <br /> 6.06 <br /> .86 <br /> Ratio of T � 5.5 ��_M � - mm6 6__ � ^ � 7....... �1 7.1 7._..9_134020 5 5v - 492 5.061 S. 5.44465 I 5.6254 61 „ .52 6.82 <br /> -91F <br /> HCO/Ca .25 .84 4.9 5.441 5.77 6.04124.00 1 .211 4.36 130 _ <br /> 35 3.61 3.72 3.80 3.94 4.04� 4.17 - 4.35I - _4.49 4.72l- 4. 11 5.21 5.45 <br /> 40 3 30 3.40 3.48�- m3.60 ._3.70� _-3.98 4.11�- 4.32 4.49 4.77� �4.98 <br /> j � 15I3 8� 1 4. 4.41 4.613.0 3.2245 I <br />