ML20245D799

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Annual Environ Operating Rept for 1988
ML20245D799
Person / Time
Site: Clinton Constellation icon.png
Issue date: 12/31/1988
From:
ILLINOIS POWER CO.
To:
Shared Package
ML20245D782 List:
References
NUDOCS 8905010172
Download: ML20245D799 (5)
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Text

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y Attechment 1 Annual Environmental Operating Report The Environmental Protection Plan (EPP) for Clinton Power Station requires that the Annual Environmental Operating Report shall include:

-(a) A list of EPP noncompliance and the corrective ~ actions taken to remedy.them.

(b). A list of all changes in station design or operation, tests, and experiments made in accordance with Subsection 3.1 which involved a potentially significant unreviewed environmental issue.

(c) A list of nonroutine reports submitted in accordance with Subsection 5.4.2.

(d) Any results.and/or assessments for the environmental monitoring

. programs described in Subsection 2.0 of this EPP which were submitted to the respective regulatory agencies during the annual reporting period.

.TheLfollowing provides the Illinois Power Company response to eacn listed item.

.a. ' Listing of EPP noncompliance and corrective actions:

1) Noncompliance On January 3, 4 and 5, 1988, screenhouse screen "F" was limited in operability because of a bent hinge and water.in its

, lubrication. Consequently, this rcreen was not backwashed for the required 40 minates.

Corrective Action Screen."F" was tagged out on January 6 and repaired / returned to service on January 27, 1988. The backwach of screen "F" was secured to prevent potential screen failure. An Operations Night Order was written to reemphasize the requirement to operators.

2) Noncompliance On April 15, 1988, the pH o the discharge at Outfall 003, Water Treatment Wastes, was

[

5.7 which was outside the National Pollutant Discharge Elimination System (NPDES) permit range of 6.0 to 9.0. ** - 1 probe had been isolated from the sampling stream, thereby l:

not allowing the pH correction equipment to I

respond to the effluent.

8905010172 890421 PDR ADOCK 05000461 '

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Attachmtnt 1 l

Corrective Action The pH probe was returned to service and discharges were resumed on April 16, 1988, with a pH of 7.5. A procedural change was made requiring the operator to verify that J the pH instrumentation is in-service prior {

to commencing a discharge, d

3) Noncompliance On May 14, 1988, screenhouse screen "A" was not backwashed for the required 40 minutes.

Screen "A" had been removed from service due to mechanical problems on May 9, 1988.

The screen was repaired, returned to service on May 14, 1988, and tested for operability. This post maintenance testing lasted four minutes.

Corrective Action Screen "A" was not backwashed for a full 40 minute cycle until May 15, 1988 because it was not considered operable until the post-maintenance testing was satisfactorily completed. The operations department at  !

Clinton Power Station was reminded of the National Pollutant Discharge Elimination System (NPDES) permit requirement.

4) Noncompliance The biochemical oxygen demand (BOD) for the sewage treatment plant sample (Outfall 002(a)) collected on August 17, 1988 was not determined. The seed material added to the sample as required for the laboratory analysis was too strong. Consequently, the dissolved oxygen was excessively depleted and the BOD could not be determined.

Corrective Action The strength of the seed material varies because the source of the seed material, raw sewage, is inconsistent in quality.

This inconsistency makes it difficult to judge the optimal dilution ratio for laboratory analysis. An investigation was conducted to find a more consistent source of seed material for future use. Other sources were tried, however no suitable source has yet been found.

5) Noncompliance On October 11, 1988, the peak total residual chlorine concentration in the discharge fiume (Outfall 002) was 0.27 mg/l whi:h exceeded the NPDES permit limit of 0.20 mg/1.

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Attachment 1 L

1 Corrective Action On October 12, 1988, the daily chlorine dosage rate was reduced and was further reduced on October 14, 1988. The presumed cause of the October 11 concentration value was the changing demand for chlorine in the process stream. No adverse effects of the chlorine concentration were observed in the discharge flume or Clinton Lake. No further corrective actions were required.

6) Noncompliance The BOD sample analysis for the week of November 6, 1988, was not completed for the sewage treatment plant effluent (0utfall 002(a)). A power outage on November 14, 1988 at 0430 caused an interruption in the incubation of the sample which (nvalidated the analysis.

Corrective Action No corrective action was taken b. :ause of the unpredictability and expectec infrequency of a power outage which could result in a similar incident.

7) Noncompliance On November 30, 1988, the fecal coliform level in the sewage treatment plant effluent (Outfall 002(a)) was 2440 colonies /100ml which exceeded the NPDES permit limit of 400 colonies /100 ml. This was caused by a jammed hypochlorinator f eed tube resulting in a failute to chlorinate the effluent. Although Chemistry results on the effluent indicated the effluent was not receiving chlorine, the inexperience of a new chemistry technician allowed the no chlorine condition to proceed until discovery of the hypochlorinator malfunction.

Corrective Action Chlorination was restored on November 30, 1988, and the fecal coliform level decreased to less than 1 colony /100 ml.

Radwaste technicians were counselled to periodically check the hypochlorinator feed tube. The Chemistry technician was counselled on the significance of not finding chlorine in the sewage treatment plant effluent and on the appropriate actions required.

8) Noncompliance The fecal coliform level in the sewage treatment plant effluent was 680 s colonies /100 ml on December 14, 1988. This exceeded the permit limit of 400 colonies /100 ml. The cause was due to improper sampling technique which resulted in the collection of a non-representative sample.

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I Attachment 1 Corrective Action Another sample was collected on December 15, 1988, and a result of less than 1 colony /100 ml was obtained. The Chemistry Technician was counselled on appropriate sampling techniques.

b. List of changes in station design or operation, tests, and experiments made in accordance with Subsection 3.1 which involved a potentially significant unreviewed environmental issue:

No changes were made in this time period to station design, operation, tests, or experiments which involved a potentially significant unreviewed environmental issue,

c. List of nonroutine reports submitted in accordance with Subsection 5.4.2:

No nonroutine reports were submitted during the subject time period.

d. Results and/or assessments for the environmental monitoring programs described in Subsection 2.0 of this EPP which were submitted to the respective regulatory agencies during the annual reporting period:

In accordance with Special Condition No. 9 of the National Pollutant Discharge Elimination System (NPDES) Permit ILOO36919. IP submitted a Preoperational Biological Report to the Illinois Environmental Protection Agency (IPEA) on March 30, 1988. This report summarized the findings, conclusions, and recommendations resulting from the Environmental Monitoring Program conducted from May, 1978 to December, 1986. The purpose of the report was to comprehensively characterize the condition of Clinton Lake prior to the release of warm water discharges from Clinton Power Station with respect to the monitoring of the following biological parameters: periphyton, phytoplankton, zooplankton, benthos, and fisheries.

In lieu of transmitting the entire seven volumes of the Preoperational Biological Report, an executive summary of the report is provided as Attachment A.

Also under Special Condition No. 9 of the NPDES permit, a Fish Impingement Monitoring Report was submitted to the IEPA on December 16, 1988. This report is provided as Attachment B.

IP submitted a report describing the results of the 1987 amoeba monitoring program to the Illinois Department of Public Health (IDPH) on February 29, 1988. The report (Attachment C) summarized the work in isolating Naegleria Fowleri from sediment and water samples from Clinton Lake. Naegleria Fowleri was not isolated during this sampling period. At the request of the IDPH, IP submitted four additional reports related to the Naegleria Fowleri issue on Maf 25, 1988, July 25, 1988, August 25, 1988 and September 12, 1988, which provided lake temperature data from Clinton Lake Main Beach (Mascoutin Beach). These additional reports are provided as Attachment D.

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Attachm:nt 1 l

A study was conducted during the time period of November 1, 1987 through March 31, 1988, to assess the frequency and severity of fog and the deposition of rime ice in the vicinity of Clinton Lake. The purpose of the study was to determine if the frequency of heavy fog and rime ice which could adversely affect local traffic would increase when Clinton Lake was used as a cooling lake for Clinton ,

Power Station. The time period of this study represents the first l winter season after the plant became operational.

The study concluded that the number of days with heavy fog at Clinton Lake is not significantly different from the number of days with heavy fog at the Springfield National Weather Service station, thus heavy fog should not be considered an unusual highway-safety hazard near Clinton Lake. It was also determined that the frequency and duration of fog near Clinton Lake was significantly lower than the values predicted in the Environmental Report - Operating License stage.

A final fog monitoring assessment report was submitted to the Illinois Department of Transportation and DeWitt County Highway Department on February 21, 1989.

In accordance with the Clinton Lake Recreational Area Master Management Plan, IP submitted a Clinton Lake Creel Survey Summary Report to the Illinois Department of Conservation on October 6, 1988. This report summarized the creel data from 1982 to 1986 and is provided as Attachmr.nt E.

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