2018-10-22_REVISION - M2008078 (12)

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Appendix C Page 64 of 67 Permit No.:COG500000 38. "Qualified Personnel" for stormwater provisions-those who possess the knowledge and skills to assess conditions and activities that could impact stormwater quality at a facility, and who can also evaluate the effectiveness of control measures. 39. "Quarterly measurement frequency" means samples may be collected at any time during the calendar quarter if a continual discharge occurs. If the discharge is intermittent,then samples shall be collected during the period that discharge occurs. 40. "Recorder" requires the continuous operation of an automatic data retention device for providing required records such as a data logger,a chart and/or totalizer(or drinking water rotor meters or pump hour meters where previously approved.) 41. SAR and Adjusted SAR-The equation for calculation of SAR-adj is: SAR-adj= Na+ Ca_, + Mg++ 2 Where: Na'=Sodium in the effluent reported in meq/1 Mg"=Magnesium in the effluent reported in meq/1 Cax=calcium (in meq/1)in the effluent modified due to the ratio of bicarbonate to calcium The values for sodium(Na+),calcium(Ca++),bicarbonate(HCO3-)and magnesium(Mg++)in this equation are expressed in units of milliequivalents per liter(meq/1). Generally,data for these parameters are reported in terms of mg/l,which must then be converted to calculate the SAR. The conversions are: meq/1= Concentraion in mg l Z Equivalent weight in mg l meq Where the equivalent weights are determined based on the atomic weight of the element divided by the ion's charge: Na'=23.0 mg/meq(atomic weight of 23,charge of 1) Ca"=20.0 mg/meq(atomic weight of 40.078,charge of 2) Mg"=12.15 mg/meq (atomic weight of 24.3,charge of 2) HCO3-=61 mg/mep(atomic weight of 61,charge of 1) 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 determine the Cax using the following table. Table-Modified Calcium Determination for Adjusted Sodium Adsorption Ratio HCO3/Ca Ratio And EC Salinity of Effluent(EC)(dS/m) 0.1 0.2 0.3 0.5 0.7 1.0 1.5 2.0 3.0 i 4.0 6.0 1 8.0 i 17.2116.43IE .05-1 13.20 13.61 13.92, 14.40 1! 1 81 17.971 19.07, 19.94 i .10( 8.31 8.57, 8.77E 9.07 9.31 9.62 10.02( 10.35 10.89 11.32 12.01 12.56 j .151 6.341 6.54: 6.691 6.92 7.111 7.341 7.65( 7.90 8.31 8.64� 9.171 9.58 .20 5.24 5.40 i 5.52 5.71! 5.87( 6.06E 6.31 6.52 6.86 7.13 7.57 7.91 Ratioof _ �._..___ __ .._ __.._ _-.-_- -_--.__r-- _.-----. --� _._-- .25; 4.51 4.651 4.761 4.92 5.06( 5.22 5.441 5.62 i 5.91, 6.15i 6.521 6.82 HCO3/Ca - -' --' - r --- T - T .30 f 4.001 4.121 4.21 4.36 4.48 4.62 4.82 4.98 s 5.24 5.44 5.77 6_04 j 35 3.61 3.72# 3.80 3.94! 4.04( 4.1 4.351 4.49 l 4.72 4.91j 5.21. 5.45 I 40 3.30 i 3.40 i 3.48+ 3.60; 3.70 I 3.82 3.98 i 4.11 j 4.32� 4.49 i 4.77 4.98 .451 3.051 3.14' 3.22� 3.33, 3.421 3.53 i 3.68� 3.80 4.00 1 4.15 4.411 4.61