Field Office Compliance - Assistance

Assistance ID - 102987
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
9/19/2018 From: Gastineau, Janet <[email protected]> Sent: Wednesday, September 19, 2018 9:21 AM To: Corrigan, Ted <[email protected]> Subject: Re: Emergency Water Supply More background information: In 1997 the Iowa DNR developed a policy/procedure statement that covered the emergency use wells, which is no more than 30 days during the year. In that, it refers to Chapter 39, which has a definition of a standby well: “Standby well” means a water well which is temporarily taken out of service with the expectation of being returned to service at a future date. 39.10 has the following: 39.10(1) Standby wells. A standby well must be disinfected prior to being taken out of use for a long period of time and must be disinfected and, as a minimum, checked for bacteria and nitrates when placed back in service. Disinfection of standby wells shall be done in accordance with AWWA (American Water Works Association) Standard A100. The well must not be subject to contamination by surface drainage or from other causes, and the well casing must be provided with an airtight cover when the well is not in use. A well must be repaired so that there is no degradation of groundwater and it is suitable for use prior to being classified as a standby well. 39.10(2) Caveat. Nothing in these rules shall be construed as exempting public water supply wells from requirements set forth in the environmental protection commission rules, 567—Iowa Administrative Code. As I mentioned, it looks like the 30 days was eventually applied to all emergency sources. JANET GASTINEAU
9/19/2018 On Wed, Sep 19, 2018 at 9:14 AM Gastineau, Janet <[email protected]> wrote: Generally, a standby source can only be used for 30 days per year. That is whether it is an emergency/standby well or consecutive emergency connection. There are some rules in 567 IAC 39 related to standby wells and it would appear that 30 days was extended to other connections as well. Operation permits include the language regarding 30 days if it has a restricted source/connection listed in the permit. Our guidance is: If the source is used for human consumption for more than 30 days per year, it is an active source. If the source is used for human consumption for no more than 30 days per year, it is considered an emergency/standby source. JANET GASTINEAU
9/19/2018 On Wed, Sep 19, 2018 at 6:54 AM Corrigan, Ted <[email protected]> wrote: Janet, Can you tell me where in the rules I can find the definition of an emergency water supply connection? Specifically I’m wondering how frequently a connection can be used and still be considered an emergency connection. JANET GASTINEAU
State of Iowa DNR Home Site Policy
Leading Iowans in caring for our natural resources
Version: 2.3.1.23706
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