Field Office Compliance - Assistance

Assistance ID - 80786
Des Moines Water Works - 310338211
9966 Maffitt Lake Dr Cumming, IA 50061
Dallas County

FO 5

Report
File Name File Type File Date Note
Comments
8/21/2015 From: McCurnin, Mike [mailto:[email protected]] Sent: Friday, August 21, 2015 10:25 AM To: Gastineau, Janet [DNR] Cc: Adams, Mike Subject: RE: DMWW SWTP July 2015 MOR Janet: Thanks for catching this…………attached is a revised form for the July 2015 SWTP MOR………. You were out of the office when this occurred. We communicated with a Brian Bunton (I believe) @ DNR on 7/31/2015. Maintenance on 7/30/2015 to a finished water pH probe resulted in reduced flow to the CL17 unit. All instruments are fed via manifold with a variety of small rotometers. These are very sensitive. Impact initially was non-discernable via our SCADA system. Restoration of more appropriate flows the following AM resulted in immediate return of normal CL2 readings. Also attached is a clipped/noted image from our trending system. Mike McC JANET GASTINEAU
8/21/2015 From: Gastineau, Janet [DNR] Sent: Friday, August 21, 2015 9:01 AM To: Mike McCurnin Subject: DMWW SWTP July 2015 MOR Can you look at the Disinfection/Oxidation data page for the 30 and 31 and make corrections for the continuous hours less than 0.3 mg/L free? Looks like the 0.1 hours on the 31st should have been put on the 30th instead (since the residual reported was greater than 0.3 mg/L on the 31st). You can just resubmit the one page electronically/scanned. What caused the diminished flow to the instrument? JANET GASTINEAU
State of Iowa DNR Home Site Policy
Leading Iowans in caring for our natural resources
Version: 2.3.1.23706
"
"