Free 53293.pdf - Indiana

MONTHLY INDIVIDUAL FILTER EFFLUENT (IFE) TURBIDITY MONITORING
State Form 53293 (6-07)

Indiana Department of Environmental Management (IDEM) Office of Water Quality - Drinking Water Branch - Compliance Section

INSTRUCTIONS:

1- Individual filters must be monitored continuously and turbidity recorded every 15 minutes. Exceedance of the performance requirement triggers follow-up action (i.e. it is not a violation). 2- If there is a failure in the continuous turbidity monitoring equipment, Subpart H systems serving a population of at least ten thousand (10,000) individuals must conduct grab sampling every four (4) hours instead of continuous monitoring, but for no more than five (5) working days following the failure of the equipment. Subpart H system serving a population of fewer than ten thousand (10,000) individuals must conduct grab sampling every four (4) hours instead of continuous monitoring until the turbidimeter is back in operation. The system has fourteen (14) days to resume continuous monitoring before a violation is incurred. 3- The system must report the filter number, turbidity measurements and dates(s) on which the exceedance occurred by the 10th of the next month. 4- When turbidity levels are exceeded in consecutive months, the water system must provide to IDEM all previous consecutive monthly monitoring forms for which the filter exceeded the levels.

For systems that serves at least 10,000 people

For systems that serves less than 10,000 people

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The system must both produce a filter profile within 7 days of the exceedance and report that it has been produced, or report the cause of the exceedance (if known). Attach information identifying every 15-min turbidity reading that caused the exceedance. The system must both produce a filter profile for the filter within 7 days of the exceedance and report that it has been produced, or report the obvious reason for the exceedance (if known). The system must conduct a self-assessment of the filter within 14 days of the exceedance and report that it was conducted.

Attach information identifying every 15-min turbidity reading that caused the exceedance. Report the cause of the exceedance (if known). No filter profiling requirements.

Report the cause of the exceedance (if known).

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The system must conduct a self -assessment of the filter within 14 days of the exceedance and report that it was conducted.

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A comprehensive performance evaluation (CPE) must be arranged no later than 30 days after the filter exceeded 2.0 NTU for the second straight month. The CPE must be completed and the report submitted within 90 days of the exceedance.

A comprehensive performance evaluation (CPE) must be arranged no later than 60 days after the filter exceeded 2.0 NTU for the second straight month, and must be completed and the report submitted within 120 days after the final exceedance.

MONTHLY INDIVIDUAL FILTER EFFLUENT (IFE) TURBIDITY MONITORING FORM (continue)

PWSID # System Name: Treatment Plant Name/Number: Submitted by: Month Year

Please submit completed forms to:
OWQ Drinking Water ­ Mail Code 66-34 100 N. Senate Avenue Indianapolis , IN 46204-2251

Fax (317) 308 -3340

Total Number of Filters:
Was each filter monitored continuously? Were measurements recorded every 15 minutes? Was there any failure of the continuous monitoring equipment? Answer these two questions only if there was a failure in the continuous monitoring equipment: Longest duration for the continuous monitoring equipment failure: hours Were grab samples collected every four hours?
List filters with turbidity levels >0.5 NTU for two consecutive 15-min measurements after the first 4 hrs of operation ** List filters with turbidity levels >1.0 NTU for two consecutive 15-min measurements in 3 consecutive months *** List filters with turbidity levels >2.0 NTU for two consecutive 15-min measurements in 2 consecutive months ****

Date

List filters with turbidity levels >1.0 NTU for two consecutive 15-min measurements *

Turbidity (NTU)