Field Office Compliance - Assistance

Assistance ID - 46477

Osceola Water Works - 310338248

2320 WEST CLAY STREET Osceola, IA 50213

Clarke County

FO 5

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File Name	File Type	File Date	Note

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Date	Comment	Commenter
4/6/2012	From: Gastineau, Janet [DNR] Sent: Friday, April 06, 2012 8:40 AM To: 'OSCEOLAWATER DEPARTMENT' Subject: FW: TCR Sampling Plans at Rural Water Systems Importance: High Brandon, I don’t know if we ever talked about this but you need to be sure as a system collecting more than 5 routine total coliform samples/month that they are collected at regular time intervals throughout the month—in other words, not all on the same day. There was a rule change in January that added rural systems to this existing rule, but compliance was run for all systems and it looks like you are currently collecting your six TCR samples all on the same day. Please make this change for April sampling if you haven’t already collected them. Thanks. Monitoring requirements. (1) Routine total coliform monitoring. 1. Public water supply systems must collect total coliform samples at sites which are representative of water throughout the distribution system according to a written sample siting plan. The plan shall be reviewed or updated by the public water supply system every two years and shall be retained on file at the facility. Major elements of the plan shall include, but are not limited to, a map of the distribution system, notation or a list of routine sample location(s) for each sample period, resample locations for each routine sample, and a log of samples taken. The plan must be made available to the department upon request and during sanitary surveys and must be revised by the system as directed by the department. 2. The public water supply system must collect samples at regular time intervals throughout the month, except that a system which uses only groundwater that is not under the direct influence of surface water and which is required to collect five or fewer routine coliform bacteria samples per month may collect all required samples on a single day if they are taken from different sites.	JANET GASTINEAU

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