Laserfiche WebLink
O <br />C <br />2 <br />1.0- <br />.0- <br />08- <br />08- <br />0.6- <br />©.6- <br />04-7 <br />04= <br />EVM W <br />• <br />A -pro 94 G -9r 99 C4"S p-0¢11 <br />Period <br />Arkansas River Basin <br />In the Arkansas River drainage only one well, the current shallow POC monitoring well ARwell, <br />has limited data prior to January 31, 1994. Prior to January 31, 1994, this well had a median <br />dissolved manganese concentration of 0.76 mg/L, with a sample size of only four. <br />Through 2016 the data from ARwell regularly exceed the 0.05 mg/L water supply standard. The <br />deeper POC well adjacent to ARwell, AR-MW001 D, was installed in 2012 and has been <br />monitored since that time with an average dissolved manganese value of 0.064 mg/L. <br />Due to the limited amount of data available prior to January 31, 1994, in the Arkansas River <br />drainage (4 sample events from one well) it is not appropriate to utilize the very limited historic <br />data from ARwell to establish a dissolved manganese standard for the existing POC wells in the <br />Arkansas River drainage. <br />