Laserfiche WebLink
Lazuk, Raymond<rlazuk@fmi.com> Mon, Oct 16,2017 at 2:06 PM <br /> To:"Scott-DNR, Eric"<eric.scott@state.co.us> <br /> Eric, <br /> As per our March 13, 2017 email to you below,we have been monitoring pH monthly at well GW#2 in the Tenmile drainage. The monthly <br /> data(below)show that we have dropped below 6.5 on a couple of occasions but saw higher values the following months. We graphed the <br /> data for the past 10 years and there does not appear to be an obvious trend with 2017 data, other than it seems to be variable(given the <br /> more frequent measurements)and generally in the range historically seen in the 2007-2008 time period. At this point I believe we can <br /> return to quarterly monitoring for pH or, if additional data is needed to document pH variability,we can continue with monthly <br /> measurements. I would appreciate your thought on this and will call you to discuss further. <br /> Thanks, <br /> -Ray <br /> pH, Field, <br /> Standard <br /> Site Number Sample Date Units <br /> GW#2 04/19/2017 6.7 <br /> GW#2 05/15/2017 6.88 <br /> GW#2 06/26/2017 6.23 <br /> GW#2 07/20/2017 6.66 <br /> GW#2 08/07/2017 6.41 <br /> GW#2 09/11/2017 6.98 <br /> GW#2 10/04/2017 7.21 <br /> GW#2-pH(2007-Current) <br /> 9 <br /> 8.5 rt — — — — — <br /> g <br /> F 7-5 — <br /> A 7 <br /> a 65 <br /> tn <br /> 6 <br /> 55 <br /> u.s 5 <br /> a <br /> 45 <br /> 4 . - <br /> 1 % O% O°5 1,\ <br /> � �� �1 �� �o� by �� <br /> I � <br /> From: Lazuk, Raymond <br /> Sent: Monday, March 13,2017 3:38 PM <br /> To: Scott-DNR, Eric<eric.scott@state.co.us> <br /> Cc: Hilshorst,Aaron(Aaron_Hilshorst@FMl.com)<Aaron_Hilshorst@FMl.com>; Haag, James(James_Haag@fmi.com) <br />