Section 809.62. Monitoring plan for Stage 2 DBP.

 

(1)   General monitoring plan requirements. Monitoring plans shall be developed, implemented and kept up to date by water suppliers for all public water systems that are required to be monitored for TTHMs and HAA5s and shall be kept on file for department and public review.

(a) Monitoring plans under this section shall be completed no later than the date the public water system is required to begin initial compliance monitoring under s. NR 809.60 (3) .

(b) The monitoring plan shall contain the all of the following elements:

1. Monitoring locations.

2. Monitoring dates.

3. Compliance calculation procedures.

4. Monitoring plans for any other public water systems in a combined distribution system.

(c) If a public water system was not required to submit an IDSE report to the EPA under Subpart U of 40 CFR 141.601 or 141.602 and does not have sufficient monitoring locations to identify the required number of locations indicated in Subpart U of 40 CFR 141.605 (b) or under s. NR 809.976 ; the water supplier shall do all of the following:

1. Identify additional locations by alternating selection of locations representing high TTHM levels and high HAA5 levels until the required number of compliance monitoring locations have been identified.

2. Provide the rationale for identifying the locations as having high levels of TTHM or HAA5. Water suppliers should compare the number of monitoring locations required under s. NR 809.565 with the number of monitoring locations under s. NR 809.61 Table Y. If the public water system was required to have more monitoring locations under s. NR 809.565 than under s. NR 809.62 compliance monitoring, the water supplier shall identify which locations will be used by alternating selection of locations representing high TTHM levels and high HAA5 levels until the required number of compliance monitoring locations under s. NR 809.61 Table Y have been identified.

(2)   Submittal of monitoring plans . If a public water system serves > 3,300 people, the water supplier shall submit a copy of a monitoring plan to the department prior to the date the water supplier for the public water system is required to conduct initial monitoring under s. NR 809.60 (3) , unless the IDSE report submitted under Subpart U of 40 CFR part 141 of the Federal Regulation contains all the information required by this subsection.

(3)   Revising monitoring plans . Water suppliers shall revise monitoring plans to reflect changes in treatment, distribution system operations and layout including new service areas, or other factors that may affect TTHM or HAA5 formation, or as approved by the department.

(a) The department shall be consulted regarding the need for changes and the appropriateness of changes to a monitoring plan.

(b) If monitoring locations are changed, existing compliance monitoring locations with the lowest LRAA shall be replaced with new locations that are expected have the highest TTHM or HAA5 levels in the distribution system.

(c) The department may also require other modifications in the public water systems monitoring plan.

(d) If the public water system serves > 3,300 people, the water supplier shall submit a copy of the modified monitoring plan to the department prior to the date the public water system is required to comply with the revised monitoring plan.

CR 09-073 : cr. Register November 2010 No. 659 , eff. 12-1-10; correction to numbering of (3) (a) to (d) made under s. 13.92 (4) (b) 1. , Stats., Register November 2010 No. 659 ; CR 15-049 : am. (1) (a), (c) (intro.), 2., (2) Register March 2016 No. 723 , eff. 4-1-16.

Note

Section NR 809.976 was repealed by CR 15-049 . Corrections will be made in future rulemaking. Microsoft Windows NT 6.1.7601 Service Pack 1