Field Office Compliance - Assistance

Assistance ID - 121494
Osceola Water Works - 310338248
2320 WEST CLAY STREET Osceola, IA 50213
Clarke County

FO 5

Report
File Name File Type File Date Note
Comments
11/19/2021 RE: chlorite monitoring question External Inbox Brandon Patterson 11:43 AM (14 minutes ago) to me Janet, I will have staff discontinue use of the old site and collect from the SEP, as it sounds like that’s the correct location anyway. I will have plant staff reach out to the manufacturer as well. We really didn’t see any differences in test results at the sample location, until the chorine feed location was moved. It seems the sample point close to the chlorine injection is not a good combination, as the lab results indicated. JANET GASTINEAU
11/19/2021 Gastineau, Janet <janet.gastineau@dnr.iowa.gov> 11:29 AM (0 minutes ago) to Brandon I would recommend using the SEP from now on. I'm not familiar with the method/test kit you mentioned, but they may also have some troubleshooting ideas if you choose to contact the manufacturer. If I hear from anyone else I'll let you know. On Fri, Nov 19, 2021 at 10:54 AM Brandon Patterson <osceolawater2@windstream.net> wrote: Janet, We are using the kemo tester from Palintest. Its similar to what Winterset is using, just the newer machine. It still appears the readings prior to the ammonia as discussed are giving false readings. The testing at the source entry location appear to be stable. JANET GASTINEAU
11/19/2021 Date: 11/19/2021 Sender: janet.gastineau@dnr.iowa.gov Note: Fwd: chlorite monitoring question Gastineau, Janet <janet.gastineau@dnr.iowa.gov> 9:52 AM (14 minutes ago) to Osceola So far this is the only response I received. Are you using a Hach method? If so, you could check with their rep: Corey at 402-769-8244 ---------- Forwarded message --------- From: Pickens, Aaron <aaron.pickens@dnr.iowa.gov> Date: Wed, Nov 17, 2021 at 3:32 PM Subject: Re: chlorite monitoring question To: Gastineau, Janet <janet.gastineau@dnr.iowa.gov> Cc: Amber Wolf <amber.wolf@dnr.iowa.gov>, Amber Sauser <amber.sauser@dnr.iowa.gov>, Wilken, Keith <keith.wilken@dnr.iowa.gov>, Carl Berg <carl.berg@dnr.iowa.gov>, Bob Campbell <bob.campbell@dnr.iowa.gov>, Veerabhadrappa, Taroon [DNR] <taroon.bidar@dnr.iowa.gov>, Lynam, Anne <anne.lynam@dnr.iowa.gov>, James Warren <james.warren@dnr.iowa.gov>, Lee, Kathy <kathy.lee@dnr.iowa.gov>, Tara Naber <tara.naber@dnr.iowa.gov> Hi Janet - Yes I have had a system experience with this with a test kit for measuring chlorite. They were a chloraminating system. The test kit was the Chlordiox Plus from Palintest I believe. At the time it may have been the only test kit type of instrument able to measure chlorite. From vague memory, the test kit uses an amperometry based method and measures free chlorine as part of the "process" so when used in a chloraminating system, interference can be seen. They gave up on finding a test kit that works and now are using amperometric titration process following amperometric method #2 under S&M 4500 CL02 E. It is a long drawn out process but does not have interference with chloramines. On Wed, Nov 17, 2021 at 2:44 PM Gastineau, Janet <janet.gastineau@dnr.iowa.gov> wrote: Has anyone ever heard of ammonia interfering with chlorite or chlorine dioxide methods used for self-monitoring? I have an operator who has been under that impression because of the previous operator and something Travis from chemsult said. I have never heard this and have two other systems absolutely monitoring at their SEP (to comply with the chlorine dioxide requirements) that add ammonia and that have had no issues. Thanks! ------------------------------------- JANET GASTINEAU
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