ML20082B103

Discharge Monitoring Rept, for Jul-Dec 1994

ML20082B103
Person / Time
Site:	Nine Mile Point
Issue date:	12/31/1994
From:	Mccormick M NIAGARA MOHAWK POWER CORP.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NMP1L-0929, NMP1L-929, NUDOCS 9504050019
Download: ML20082B103 (25)

Text

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Y NIAGARA -

NUMOHAWK l

• ' IAGARA MOHAWK POWER CORPORATIONNNE MILE POINT NUCLEAR STATION, P.O. BOX 63, LYCOMING, N Y.13093/TEL. (315) 349-2060 l

N FAX (315) 349 2605 MARTIN J. McCORMICK JR P E.

N Jea fety Assessment and Support March 24,1995 NMPIL 0929 j l

l U. S. Nuclear Regulatory Commission Attn: Document Control Desk &

Washington, DC 20555 l 3

RE: Nine Mile Point Unit 1 Nine Mile Point Unit 2  ;

Docket No. 50-220 Docket No. 50-410 DPR-63 NPF-69 i

Subject:

Report on the Status of the Nine Mile Point Nuclear %tian NPDES /SPDES Discharge Pennit and Any Occurrences of Non-Compliance

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Gentlemen: ,

This report is being issued to keep you informed of changes in the Nine Mile Point Nuclear l Station's NPDES /SPDES Discharge Permit (No. NY-000-1015) and occurrences of permit -  !

non-compliance. During the reporting period of July through December 1994, the station was unable to meet the requirements of the NPDES /SPDES Discharge permit on ten occasions. The occasions are categorized below for two separate areas: permit conditions, i and permit effluent limitations. l l

Permit Conditions On four (4) occasions, a non-safety related strip chart recorder, that records continuous input from station sensors at Unit 1 for intake-discharge temperature difference, recorded ,

inaccurate values. On another occasion, a non-safety related multi-parameter strip chart  !

recorder failed to record continuous input from the plant process computer for Unit 2 intake- ,

discharge temperature difference. During this instance, the recorder pen had failed, and the  !

period of recorder inoperability was short. On each of the above occasions, data was obtained from other station records. Niagara Mohawk considers these occasions to have no  !

impact on the environment. A description and impact of these occurrences were included in i the comments section of the monthly summary reports sent to the NYSDEC. j l

Permit Effluent Umitations  ;

l On five (5) separate occasions, the station was unable to meet the requirements of the NPDES /SPDES Discharge Permit relative to permit effluent limitations. One of the occasions occurred at Unit I while the other four occurred at Unit 2.

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The Unit 1 occasion involved a Clam-Trol treatment for the control of zebra mussels and was reported as a permit exceedence, rather than a violation, as it involved an analysis error.

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Three of the four Unit 2 occasions also involved Clam Trol Treatments. Two were reported

as permit violations, exceeding the permit discharge limu of 0.2 mg/L for Clam-Trol. The -

third was reported as a permit exceedence, rather than a violation, as it involved a  ;

mixing / sampling error, i

The fourth Unit 2 occasion, involving a permit effluent limitation, occurred when a Unit 2 service water strainer was discharged to a sump, and the total suspended solids were above  !

the permit daily limit of 50 mg/L. However, since the receiving sump was quite large, most j solids (sand and silt) would have settled out prior to discharge from the sump; therefore, it was unlikely th. the permit discharge limit of 50 mg/L would have been exceeded.

Copies of the comment pages and " Report of Non-Compliance Event" forms sent monthly to  !

the NYSDEC, detailing the permit non-compliances as well as other pertinent comments, are i attached. ,

The existing SPDES Discharge Permit, which expired July 1,1988, was renewed by the NYSDEC on October 26,1994 and became effective on December 1,1994. Niagara i Mohawk notified the Commission, by letter, on November 18,1994 of the renewal of the station's SPDES Permit and on March 3,1995 of NYSDEC corrections to the permit.

Niagara Mohawk will fulfill the requirement to keep the NRC staff informed of any changes ,

in the NPDES /SPDES Discharge Permit or of any permit non-compliances. Such information will be supplied on a semi-annual basis.

In the event there are any questions concerning permit non-compliances and revisions, or the reporting schedule, please contact Mr. Anthony M. Salvagno at (315) 349-1456.

Very truly yours,

- __ i M. . McCormick VP-Nuclear Safety Assessment & Support  !

MJM/CDH/kab Attachments xc: Mr. Thomas T. Martin, Regional Administrator, Region I Mr. L. B. Marsh, Director, Project Directorate I-1, NRR  !

Mr. G. E. Edison, Senior Project Manager, NRR i Mr. B. S. Norris, Senior Resident Inspector '

Records Management 5

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DISCHARGE MONITORING REPORT PERMIT NUMBER NY-006-1015 NINE MILE POINT NUCLEAR STATION JULY 1994 l COMMENTS l 1

1. There was one discharge from the Unit 2 Waste Neutralizing Tank to the Site Sewage Treatment l Plant during July 1994. The discharge was initiated on July 11,1994, and continued at a rate of i approximately 12 gpm into July 15, 1994. The discharge consisted of demineralized water. The l volume discharged was approximately 60,000 gallons. Water from the Waste Neutralizing Tank l originated from repetitive testing and flushing of demineralized water from the portable I demineralized water unit in use at Unit 2. I

2. Copper discharged from the Unit 2 Circulating Water System during July 1994 is believed to have originated from copper loss from the Admiralty brass condenser tubes. Copper concentration in the l

Circulating Water System during July 1994 ranged from 52 ppb to 112 ppb (78 ppb average) total copper.

The total copper concentration in Lake Ontario during July 1994 was maintained below 17 ppb as a I result of the discharge of water from the Unit 2 Circulating Water System. The copper concentration in Lake Ontario ranged from 0.8 ppb to 3.2 ppb (2.2 ppb average) total copper. The ,

discharge of the Unit 2 Circulating Water System was through the normal system blowdown I pathway during July 1994. l

3. Copper-Trol, an azole based copper corrosion inhibitor, was added to the Unit 2 Circulating Water System on July 27,1994. The addition followed the requirements of the NYSDEC as contained in l Niagara Mohawk's request dated September 11,1989, and the Department's subsequent approval I dated November 11, 1989. Results of online corrosion monitoring indicate that copper loss from I the condenser tubes has decreased appreciably from system design specifications as a result of Copper-Trol use.

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4. Betz Slimicide C-94, a bromine based biological fouling control chemical, was added to the Unit 2 Service Water System during July 1994. The addition followed the requirements of the NYSDEC, as contained in Niagara Mohawk's request dated July 10,1991, and the Department's subsequent approval dated March 16,1992. The concentrations of total residual halogen (TRH) did not exceed the discharge limitation of 0.-2 mg/l as determined from analysis of grab samples collected from the Service Water System during discharge. l

5. On the attached SPDES/DMR forms " NODI C" was noted for Unit 1 Outfall 010 as there were no  ;

Clam-Trol additions at Unit I during July 1994. Also, for Unit 2 Outfall 041, since all pH analyses  !

fell within the 6.0 to 9.0 range, " NODI C" was noted for the pH range of 4.0 to 9.0.  ;

1

6. The Unit 2 strip chart recorder used to measure Outfall 040 (Cooling Tower Blowdown and Service Water) discharge flow, intake / discharge temperature difference (AT) and discharge temperature failed to record the AT for several days in July 1994, due to a pen recorder malfunction. The pen j recorder was returned to service as soon as the malfunction was discovered and the daily periodic l log data was used for these periods.

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DISCHARGE MONITORING REPORT i PERMIT NUMBER NY4061015 NINE MHR POINT NUCLEAR STATION l JULY 1994 Continued  ;

.C.OhB(ENTS f

7. Betz Clam-Trol (CT-1), a molluscicide used for zebra mussel control, was added to the Unit 2 j Service Water System and a portion of the Fire Protection System from' July 13,1994, to July 14, i 1994. The addition followed the requirements of the NYSDEC as contained in the site's SPDES Permit modification dated September 28,1990. All but one of the detoxified effluent sample results ,

were less than the 0.2 mg/l permit limitation. The one sample in question was 0.325 mg/l and is not considered by NMPC to be representative of actual effluent conditions for the following -l reasons:  :

e Obtaining a completely mixed effluent sample is difficult at times because the only available ,

sample point is in close proximity to the detox addition point ,

o Samples immediately before and after this sample were below the 0.2 mg/L limit '

e No detox feed rate anomalies were experienced  !

e The Clam-Trol was being detoxified at a 2:1 ratio i e Service water flow rates were relatively consistent i All other permit conditions, relative to the treatment,' were met. ,

8. From July 11 - 15, 1994, Unit I was shut down for a forced outage. One of the outage tasks.  !

involved cleaning the main condenser tubes. Per NYSDEC direction, the tube cleaning end product l (service water and high copper content sludge) was pumped to a tanker for later analysis and  ;

eventual disposal. On July 15,1994, at approximately 1500 hours0.0174 days <br />0.417 hours <br />0.00248 weeks <br />5.7075e-4 months <br />, the hose discharging into the ,

tanker became dislodged and a small spill of the condenser cleaning by-product occurmd. The j majority of the spill was contained in a small portable containment pool. However, an estimated 30 l

- 40 gallons spilled to the stones and soil under the tanker. The tanker was secumd and then moved  !

to allow for removal of the contaminated stones / soil. Stones / soil were removed to a depth of about l 8 inches and deposited into 13 steel drums (55 gallon). This incident was reported to the NYSDEC,  !

was contained in the stone area (with no leakage to storm drains) and cleaned up immediately.  !

There was no impact on the environment.

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9. On July 9,1993, a portion of a modification was completed that changed the water supply to the l Unit 1 Fire Pump Head Tank from service water to city water. This tank is located in the Unit 1 Screenhouse. Aftes4he modification was completed, a work order was written (August 8,1993) to l

investigate the cause and repair a leak from the head tank. A plugged valve was repaired on j December 3,1993, and a faulty level float was repaired on December 28,1993, finally stopping the  !

leak of city water into the circulating water (lake water).  ;

i The leak was estimated to very from a steady drip to a slight trickle. This incident was reported to

, the NYSDEC since city (domestic) water flowed to a Screenhouse drain that ultimately drained to the discharge canal. Due to the small degree of the leak, the impact on the environment is  !

considered insignificant.

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3 DISCHARGE MONITORING REPORT PERMIT NUMBER NY-006-1015 NINE MILE POINT NUCLEAR STATION JULY 1994 Continued COMMENTS

10. Approximately 13 hours1.50463e-4 days <br />0.00361 hours <br />2.149471e-5 weeks <br />4.9465e-6 months <br /> of data from the Unit 2 process computer (P-log) for July 21,1994, was not able to be located and was inadvertently discarded. . This data is used to prepare the 401 Reports as mquired in Additional . Requirement 5 of the Nine Mile Point SPDES Permit. Currently, the computer tape is erased each day at midnight, and the hard copy of the P-log is the only existing  ;

record. Action has been taken by the Permittee to accelerate the installation of computer software (already purchased) that will allow the P-log to be backed up on a disc.

11. The Unit 1 strip chart recorder used to measure Outfall 010 (Condenser Cooling Water) discharge temperature difference provided AT values that were too high for July 1,1994, through July 31, 1994. Therefore, Process Computer (P-log) records were used for this time period. Apparently, the calibration of the recorder may have been out of specification. Investigation / repair has been ,

initiated, i

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. 1 SECTION I 1,*

New York State Devartment ofEnvironmental Conservation i Division of Water' W~

Report ofNoncompliance Event To: DEC Water Contact William McCarthy DEC Region:

Report Type: 5 Day X Permit Violation uder Violation Anticipated Noncompliance BypesaK)verflow SECTION 2 SPDES #: Ny. 000-1015 Facility: Nine Mile Point Nuclear Station Date of noncompliance: 07 / 14 / 94 tocation (ostrali. Treatment Unit, or Pamp Statina): 040 Description of eoscompliance(s) and casse(s): During the Unit 2 Clam-Trol treatment of July 13-14, 1994  ;

one arab samole (taken at 0010 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br /> on 07/14/94 analysis result was U.Rb mg/L which is l ahnup tho 9pnFR Permit limit nf 0.2 mo/L. '

1 His event ceased? (Yes) (No) If so, when? 07/14/94 was event des to plant speet? (Yes) h SPDES limits violated?h (No)

Start date, time of evest: 07f 14/ 94 00 10 )(PM) End date, time of event: 07 f14 , 94 00 .10 g (pg)  ;

i Dzt2, time oral notification made to DEC? 07/19 / 94 11 00 M (PM) DEC omcial contacted: Wil1iam McCarthy v

immediate corrective actions: (See Attached) l Prstattive (ions term) corrective actions: (See Attached)

SECTION 3 Comelete this section if rvent was a byness: -

Bypass amount: Was prior DEC authorizanon received for this event? (Yes) (No) I DEC Official contacted: Date of DEC approval: / /

Describe event la Descripties of moecompliance and esase" area la secties 2. Deter the start and end dates and times in Section 2 alsa.

SECTION 4 Fccility Representative: [//II N

Title:

4 /A/' 40' E Mate: M/N/N Phone #: ( 36 ) M7 2V26 Faz #: ( IM) JVS -

• 7/

i 3506 101 (1233)

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REPORT OF NON-COMPLIANCE EVENT i I

SECTION 2 (Continual) '

1 Immediate Corrective Actions: >

The Detox addition rate was increased and another grab sample was taken at 0140 hours0.00162 days <br />0.0389 hours <br />2.314815e-4 weeks <br />5.327e-5 months <br />, analyzed, and found to be below the permit limit of 0.2 mg/L. The Permittee does not consider this occurrence to be permit violation for the following reasons:

1. Obtaining a completely mixed effluent sample is difficult at times because the m1y available sample point is in close proximity to the Detox addition point. Samplig; further downstream is not possible due to the facility design.

- 2. The grab samples immediately prior (@ 2200 hours0.0255 days <br />0.611 hours <br />0.00364 weeks <br />8.371e-4 months <br /> on July 13,1994) and after (@

0140 on July 14,1994) were well below the permit limit of 0.2 mg/L (0.0 mg/L and 0.143 mg/L) respectively. i

3. During the treatment no Detox feed rate anomalies were experienced.

4. The molluscicide Betz Clam-Trol (CT-1) was being detoxified with additions of Betz Detox (a bentonite clay slurry) at a 2:1 ratio during the treatment.

5. The service water flow rates were relatively consistent during the entire treatment.  !

Based upon the above information, NMPC concludes that the 0.325 mg/L result was most likely the result of a problem with obtaining the grab sample (i.e. location or technique).

I Preventive unne term) Corrective Actions:

The following corrective actions will be implemented for future Clam-Trol treatments:

1. The samplinptechnique will be evaluated to ensure that all samples are obtained in the same manner.

2. The sampling location will be re-evaluated to ensure that samples collected are thoroughly mixed and the best available sample location is used.

3. An additional sample will be taken at the discharge sample location. The additional sample will be analyzed if the first sample exceeds the 0.2 mg/L limit.

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. DISCIIARGE MONITORING REPORT PERMIT NUMBER NY 400-1015 NINE MHR POINT NUCLEAR STATION AUGUST 1994 4

COMMENTS

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'1. No preprinted DMR form was received for Outfall 022 (Security Building-Air Conditioning). There l '

were no discharges from this outfall directly to Lake Ontario (receiving water body) during August 1994. Any discharge during nugust 1994 was directed to the site sewage treatment facility. l l

2. Copper discharged from the Unit 2 Circulating Water System during August 1994 is believed to . l have originated from copper loss from the Admiralty brass condenser tubes. Copper concentration,  !

in the Circulating Water System during August 1994 ranged from 52 ppb to 101 ppb (78 ppb average) total copper.

The wn! copper concentration in Lake Ontario during August 1994 was maintained below 17 ppb as 'l a reau of the discharge of water from the Unit 2 Circulating Water System. The copper  ;

concentration in Lake Ontario ranged from 1.3 ppb to 3.4 ppb (2.1 ppb average) total copper. The  :

discharge of the Unit 2 Circulating Water System was through the normal system blowdown l pathway during August 1994.

3. Betz Clam-Trol (CT-1), a molluscicide used for zebra mussel control, was added to the Unit 1 l Service Water System from August 2,1994, to August 3,1994. He addition followed the j requirements of the NYSDEC as contained in the site's SPDES Permit modification dated l September 28,1990. All detoxified effluent sample results were less than the 0.2 mg/l permit ,

limitation. ,

Note: During the August 2-3,1994, zebra mussel treatment of the S:rvice Water System with .

Clam-Trol at Unit 1, a single analysis of a grab sample of the discharge canal resulted in a value of-  ?

0.24 ppm CT-1 (Betz Clam-Trol). The immediate response to this result was to suspend the addition of CT-1 to the Service Water System, in accordance with the procedure, while continuing l to apply detox material (as required) to the discharge. i The organic extract of the CT-1 analysis did not indicate a color presence, which is an indication of  !

low level concentrations of CT-1. Therefore, the analyst reviewed the procedure, cleaned the glassware, and inspected the spectrophotometer, looking for a source'of error that would contribute - ,

to the increased absorbance of the grab sample. It was determined through raaantad blank analyses,  !

that the increased grab sample absorbance was from the increased absorbance of the analysis blank. l The change in blank absorbance occurred during a shift change in analysts. When recalculated, the i 0.24 ppm CT-1 concentration in the discharge canal sample, using the new determined blank value,  !

resulted in a value of <0 2 ppm CT-1. The recalculated value reft ts an accurate CT-1 l concentration, and the Cr-1 limit of 0.2 ppm was not exceeded. De zebra mussel treatment was i continued, using the new determined blank absorbance in the CT-1 analyses. Therefore, the l l

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DISCHARGE MONITORING REPORT

, PERMIT NUMBER NY-000-1015

.- NINE MILE POINT NUCLEAR STATION AUGUST 1994 COMMENTS indication of a value in exceedence of 0.2 mg/ liter on the Outfall 010 DMR form is based on a laboratory error (as described above) and as such, this is not deeined a permit violation.

This occurrence has heightened the awareness of the critical factors involved in the analysis of low level CT-1 measurements at the level of analytical sensitivity. -

To the best of our knowledge, all other permit conditions, relative to the treatment, were met.

4. Betz Clam-Trol (CT-1), a molluscicide used for zebra mussel control, was added to the Unit 2 Service Water System and the Fire Protection System on August 31,1994. The addition followed. ,

the requirements of the NYSDEC as contained in the site's SPDES Permit modification dated September 28,1990. The second grab sample obtained after the addition started was 0.6 ppm (duplicate sample showed a result of 0.34 ppm). This exceeded the 0.2 mg/l permit limitation and the addition was terminated.

The sample result of 0.6 ppm was thoroughly investigated by the permittee and all indications are that this was a valid analyses. However, a new sampling methodology and sampler was used for  ;

this addition (as well as the July 13-14,1994, addition) and it is now believed that this new grab sample methodology and sampler resulted in obtaining samples'from areas of the discharge bay that were not yet thoroughly mixed and therefore not truly representative of detoxified effluent. The 1 applicable procedures have been revised to use the original grab sample methodology used during 1991-1993. In addition, this sample is not considered by NMPC to be representative of actual effluent conditions for the following reasons: 1 e Obtaining a completely mixed effluent sample is difficult at times because the only available sample point is in close proximity to the detox addition point e The sample immediately before this sample was below the 0.2 mg/L limit )

e No detox or Clam-Trol feed rate anomalies were experienced I e Clam-Trol was being detoxified at a 2:1 ratio e Service water flow rates were relatively consistent The terminated Clam-Trol treatment was re-scheduled for September 21,1994, and the original grab sample methodology and sampler was used. j 1

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l (IUF94.087)

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SECUON I

,. l New York State Denartment ofEnvironmental Caiu.ation Division of Water Report ofNoncompliance Event W~

l To: DEC Wetw contact William F. McCarthy 7' DE %-

Report Types $ Day X Permit gnce g,,,, y,,,,,;,, A,,ic,p,,,, g{= _ . =

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SECTION 2 SPDES #: NY. 000-1015 Facility: Nine Mile Point Nuclear Station Date of noncompliance: 08 , 02 ,94 Locaties Treatment Unit, er Pump stati.a): 010 Description of noncesspliance(s) and cause(s): See Attached H*s svent ceased? (No) If so, when? 08/02/94 was event d to pia : speet? (Yes)

SPDES limits violated? (Ye Start date, time of evest: 08, 02 ,94 21 .03 (gy) g,, ,,,,, ,,,, of eveet: 08 f 02 , 94 21.03 (gg)g De's, time oral notification made to DEC? 08 iO4 i 94. 14 : 00 (f DEC ofnelei c t.cted: William F. McCarthy ,

immediate corrective actions: See Attached Preve:tive (long term) corrective actions: See Attached SECTION 3 Cornolete this section if event was a bvoass:

Bypass amount: Was prior DEC authortzassoas received for this event? (Yes)(No)

DEC Omcial contacted: Date of DEC approval: I /

Describe event im " Description of moeconspliance and cause" area in Section 2. Detail the start and end dates and times is Section 2 abse.

SECTION 4 Fac;lity Representative: M M

Title:

Y. (Os Date: /

Phone #: ( I ' 13d - b Faz#:( S' I ) E E N

• See Comment #3 to DMR Form 3506-101 (12/93)

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. REPORT OF NON-COMPLIANCE EVENT L!

SECTIbN 2 (Continued) .

Descriotion of noncomoliance(s) and cause(s): a f

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During the August 2-3,1994, zebra mussel treatment of the Service Water System with Clam-Trol at Unit 1, a single analysis of a grab sample of the discharge canal resulted in a value of 0.24 ppm CT-1 (Betz  !

Clam-Trol). ,

The organic extract of the CT-1 analysis did not indicate a color presence, which is an indication of low .

- level concentrations of CT-1. Therefore, the analyst reviewed the procedure, cleaned the glassware, and ' l inspected the spectrophotometer, looking for a source of error that would contribute to the increased absorbance of the grab sample. It was determined through repeated blank analyses, that the increased grab .l

sample absorbance wu from tr.e increased absorbance of the analysis blank.

l The change in blank absorbance ou:urred during a shift change in analysts. When recalculated, the 0.24 ppm CT-1 concentration in the discharge canal sample, using the new determined blank value, resulted in.a.

value of <0.2 ppm CT-1. The recalculated value reflects an accurate CT-1 concentration, and the CT-1 limit of 0.2 ppm was not exceeded. The zebra mussel treatment was continued, using the new determined blank absorbance in the CT-1 analyses. Therefore, the indication of a value in exceedence of 0.2 mg/ liter l on the Outfall 010 DMR form is based on a laboratory error (as described above) and as such, this is not i deemed a permit violation.

Immedinte Corrective Action:

[

The immediate response to this result was to suspend the addition of CT-1 to the Service Water System, in accordance with the procedure, while continuing to apply detox material (as required) to the discharge. [

Investigation as to analysis anomalies (as stated above) was initiated.

Preventive (lone term) corrective actions: Due to a heightened awareness of the critical fr.ctors involved in the analysis of low level CT-1 measurements at the level of analytical sensitivity, steps to increase care, and attention have been taken to ensure results are accurate. These actions include.

1. Segregation' of low level and high level range glassware for the analyses. i

2. A reagent grade pure water blank on the low level range will be run once per 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

3. A comparison of low level range blank and reagent grade pure water will be made in order to determine if there are any inaccuracies. .

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W SECDON 1 .

New York State Dreartment ofEirrk; .=& ital Consermtion Division of Water M .'

Report of Noncompliance Event W~

To: DEC Water Contact __ William F. McCarthY DEC Negions- 7 Report Type: 5 Dey Y Permit Violance . Order Vioission Andcapened M -- BypesaOverdow

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SECTION 2 SPDES #: NY. 000-1015 ye,3u,y: Nine Mile Point Nuclear Station Date of neecompliance: 08 / 31 / 94 t e nee era Treetamet Unit, er remy Staties): 040 Description of noncomplisecets) sad esape(s): See Attached l

Has event ceased? o) If se, whee? 08/31/04 Was eveet due to plast speet? (Yes (No)

PDES Hekt violated?

i Stre date, time of evest: 08 i31 / 94 17 55 (AM) Q End date, time of evesc 08 /31 i94 18 30 (AM)

Dan, time oral notifiesties made to DEC? 09,02,94 15 .15 DEc omnet esew:

William F. McCarthy l

(

Immediate corrective series : See Attached l

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l Prev 2ntive (long term) corrective setions: See Attached SECT 10N 3 Completr this secuan if event was a bvness-Bypass amount. Was prior DEC suchenantion recerved for this event? (Yes)(No)

DEC Official connected . Does of DEC appnyval- I /

Describe event le " Description of eeneesspelasee med esese" area le Secties 2. Detn5 the start and end daens and times in Seetles 2 she.

SECTION 4 Facility Representative: N

Title:

• Date: k/ /

rhose n: q Rt( ) 140 . 24 d 0 Fan n: t 5l5~ 1 5#lI OEU 5

REPORT OF NON-COMPLIANCE EVENT SECTION 2 (Continued) .

Descriotion of noncomoliance(s) and cance(s): During the August 31,1994, Clam-Trol treatment at Unit 2, the second grab sample obtained after the addition started was 0.6 ppm (duplicate sample showed a result of 0.34 ppm). This exceeded the 0.2 mg/l permit limitation and the addition was terminated. However, a new sampling methodology and sampler (i.e., a Kemmerer sampling bottle) was used for this addition (as well as the July 13-14,1994, addition) and it is now believed that this new grab sample methodology and sampler resulted in obtaining samples from areas of the discharge bay that were not yet thoroughly mixed and therefore not truly representative of detoxified effluent.

In addition, this sample is not considered by NMPC to be representative of actual effluent conditions for the following reasons:

1. Obtaining a completely mixed effluent sample is difficult at times because the only available sample point is in close proximity to the detox addition point. Sampling further downstream ,

is not possible due to the facility design.

2. The grab sample immediately before this sample was below the permit limit of 0.2 n g/L.

3. During the treatment, no detox or Clam-Trol feed rate anomalies were experienced.

4. The molluscicide Betz Clam-Trol (CT-1) was being detoxified with additions of Betz detox (a bentonite clay slurry) at a 2:1 ratio during the treatment.

5. The service water flow rates were relatively consistent during the entire treatment.

Immediate corrective actions: The Clam-Trol addition was terminated (as required by procedure) and detox addition continued until applicable plant systems were detoxified.

Prevendve (long term) corrective actions: The applicable procedures have been revised to use the original grab sample methodology used during 1991-1993. The terminated Clam-Trol treatment was re-scheduled for September 21,1994, and the original grab sample methodology and sampler was used.

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DISCHARGE MONITORING REPORT

., PERMIT NUMBER NY-000-1015 NINE MILE POINT NUCLEAR STATION SEFI' EMBER 1994 COMMENTS

1. No preprinted DMR form was received for Outfall 022 (Security Building Air Conditioning). There were no discharges from this outfall directly to Lake Ontario (receiving water body) during September 1994. Any discharge during September 1994 was directed to the site sewage treatment facility.

2. Copper discharged from the Unit 2 Circulating Water System during September 1994 originated from the Admiralty brass condenser tubes. Copper concentration in the Circulating Water System during September 1994 ranged from 77 ppb to 151 ppb (112 ppb average) total copper.

The total copper concentration in Lake Ontario during September 1994 was maintained below 17 ppb as a result of the discharge of water from the Unit 2 Circulating Water System. The copper concentration in Lake Ontario ranged from 1.5 ppb to 3.9 ppb (2.8 ppb average) total copper. The discharge of the Unit 2 Circulating Water System was through the normal system blowdown pathway during September 1994.

3. There was one discharge from the Unit 2 Waste Neutralizing Tank to the Site Sewage Treatment Plant during September 1994. The discharge was initiated on September 11,1994, and continued at a rate of approximately 12 gpm into September 15, 1994. The discharge consisted of demineralized water. The volume discharged was approximately 60,000 gallons. Water from the Waste Neutralizing Tank originated from repetitive testing and flushing of demineralized water from the portable demineralized water unit in use at Unit 2.

4. Copper-Trol, an azole based copper corrosion inhibitor, was added to the Unit 2 Circulating Water System on September 14, 1994. The addition followed the requirements of the NYSDEC as  :

contained in Niagara Mohawk's request dated September 11,1989, and the Department's subsequent approval dated November 11, 1989. Results of online corrosion monitoring indicate that copper loss from the condenser tubes has decreased appreciably from system design specifications as a result of Copper-Trol use.  ;

)

5. Betz Slimicide C-94, a bromine based biological fouling control chemical, was added to the Unit 2  ;

Service Water System during September 1994. The addition followed the requirements of the )

NYSDEC, as contained in Niagara Mohawk's request dated July 10,1991, and the Department's l subsequent approval dated March 16, 1992. The concentrations of total residual halogen (TRH) did not exceed the discharge limitation of 0.2 mg/L as determined from analysis of grab samples collected from the Service Water System during discharge.

DISCHARGE MONITORING REPORT PERMIT NUMBER NY-000-1015 NINE MILE POINT NUCLEAR STATION SEPTEMBER 1994 COMENTS Continued

6. On the attached SPDES/DMR forms " NODI C" was noted for Unit 1 Outfall 010 as there were no Clam-Trol additions at Unit 1 during September 1994.

7. The Unit 1 strip chart recorder used to measure Outfall 010 (Condenser Cooling Water) discharge temperature difference provided AT values that were too low for September 9,1994, through September 30,1994. Therefore, Process Computer (P-log) records were used for this time period.

The calibration of the recorder may have been out of specification and/or an electronic component failure may have occurred. Investigation / repair has been initiated.' Also, due to the age of the recorder (and associated electronics, etc.) and recurring operability concerns, replacement with more modern equipment has been approved and will be scheduled for either late 1994 or after the 1995 Refuel Outage.

i

8. Betz Clam-Trol (CT-1), a molluscicide used for zebra mussel control, was added to the Unit 2 Service Water System and the Fire Protection System on September 21-22,1994. The addition followed the requirements of the NYSDEC as contained in the site's SPDES Permit modification .

dated September 28,1990. The sample collected at 2052 hours0.0238 days <br />0.57 hours <br />0.00339 weeks <br />7.80786e-4 months <br /> on 9/21/94 was 0.21 mg/L while another "back-up" sample collected at 2057 hours0.0238 days <br />0.571 hours <br />0.0034 weeks <br />7.826885e-4 months <br /> on 9/21/94 was 0.2 mg/L. Due to the first sample above being greater than the 0.2 mg/L permit limitation, another pair of samples was collected at 2147 hours0.0248 days <br />0.596 hours <br />0.00355 weeks <br />8.169335e-4 months <br /> and 2153 hours0.0249 days <br />0.598 hours <br />0.00356 weeks <br />8.192165e-4 months <br /> ("back-up" sample). The analyses results of these samples were 0.22 mg/L and <0.2 mg/L respectively. Since the analyses results of both "back-up" samples were less than or equal to the 0.2 mg/L permit limitation, the two results that exceeded the 0.2 mg/L permit limitation are not considered by NMPC to be representative of actual effluent conditions for the following reasons:

e Obtaining a completely mixed effluent sample is difficult at times because the only available sample point is in close proximity to the detox addition point e The scheduled samples obtained immediately before and after the occurrences (as well as the "back-up" samples) were less than or equal to the 0.2 mg/L permit limitation e No detox or Clam-Trol feed rate anomalies were experienced e Clam-Trol was being detoxified at a 2:1 ratio e Service water flow rates were relatively consistent e Values reported to the hundredths place are statistically insignificant *

• This conclusion is based upon information provided by Betz Chemical (manufacturer /

supplier of Clam-Trol or CT-1) regarding the CT-1 analytical test method for use of their product in industrial water systems, and proper statistical protocol for reporting laboratory results pursuant to such procedures. Based upon this information, values beyond the tenth's  !

digit are statistically insignificant and have no accuracy nor basis for reporting. Therefore, .I NMPC does not consider the two values in question (0.21 mg/L and 0.22 mg/L) as an excursion, and we are in the process of revising our reporting procedures in accordance with l

~

DISCHARGE MONITORING REPORT PERMIT NUMBER NY-000-1015

. NINE MILE POINT NUCLEAR STATION SEPI' EMBER 1994-COMMENTS Continued  ;

I the Betz protocol such that we will only be reporting values to the tenths, and not to the hundredths, for future Clam-Trol treatments.

9. During the month of September, the Unit 2 Service Water Pump B Strainer was drained to a large i sump. This sump discharges to Lake Ontario via the Storm Sewer System on high level and is part '

of Outfall 007 (floor and equipment drains).

Samples were collected from the strainer discharge and were analyzed for pH, total suspended solids (TSS) and oil and grease. The TSS result, as noted on the Outfall 007 DMR form, was 69.2 '

mg/L. Since this strainer was drained to a large sump, most of the solids (sand and silt) would have settled out prior to any subsequent discharge. Therefore, it is most probable that any ,

discharge from the sump would have been less than the permit limit of 50 mg/L and that the TSS result reported from the strainer discharge does not represent an excursion.

10. In September, a small leak was identified from the Unit 1 Make-up Demineralizer System. The system is no longer in active service. The leak was from the make-up valve to the precipitator tank -

and was causing the tanks' overflow line to discharge water (lake water) at a very low flow rate, to -

a small stone filled concrete pit near the Sewage Treatment Plant Pump Station. Overflow from this pit would flow through stone (gravel) to the Northwest drainage ditch eventually flowing to Lake Ontario. This system is associated with Outfall 021. The discharge associated with this event is of no environmental significance, f

I I

I I

i i

(HJF94.099) sECHON 1 .

l l

New York State Denartment of Environmental Conservation-

i Division of Water ,

Report ofNoncompliance Event W~

)

DEC W :- 'I~

To: DEC Water Contact William F. McCarthy "

Exceedence l Report Type: 5 Day X Permi>Wesismou- . Order Violanon NW Noncompliance .BypeseOverflow )

1 i

i SECTION 2 l SPDES #: NY- 000-1015 Fac m :

Nine Mile Point Nuclear Station Date of noncomplisace: 09f 21 i 94 Location Treatment Unit, or Pump Staties): 040 Description of nonce.mpliance(s) and cause(s): See Attached l

I His svent ceased? (No) If so, when? 09/21/94 was event due to plast upset? (Yes) h SPDES limits violaesd? (Yes Stri date, time of evest: 09i 21 f 94, 20. 52 MM)@ End does, time of evoet: 09 r21 / 94 21 53 _ (AM)h D:te, tirne oral notification made to DEC? 09f23, 94 16. 15 M) DEC oscial contacted: William F. McCarthy Imm1diste corrective actions: 500 Attached Preveltive (long term) corrective actions:

See Attached

}

p _

-t - SEE A 7"incHEh 90 7E.

l SECTION 3 l

Complete thir section if event was a bvosss:

Bypass amount: Was prior DEC suthoruanon tectived for this c end (Yes)(No)

DEC Omcial contacted: . Does of DEC approval: / /

Describe event in " Description of soecomplisses sad cause" ares is Secties 2. Detail the start and end dates and times in Section 2 sise. ,

SECTION 4 Frcility Representative:

s

Title:

• Date: /O / /W

! 4 ,

Phone #: f N ) .N.Mb Fax #: ( ) -

REPORT OF NON-COMPLIANCE EVENT (NY-000-1015) i SECTION 2 (Continued) '

i Description of noncompliance (s) and cause(s): I

_ Betz Clam-Trol (CT-1), a molluscicide used for zebra mussel control, was added to the Unit 2 Service Witer System and the Fire Protection System on September 21-22,1994. The addition followed the requirements of the NYSDEC as contained in the site's SPDES Permit modification dated September 28, 1990. The first sample collected at 2052 hours0.0238 days <br />0.57 hours <br />0.00339 weeks <br />7.80786e-4 months <br /> on 9/21/94 was 0.21 mg/L while another "back-up" sample- l

, collected at 2057 hours0.0238 days <br />0.571 hours <br />0.0034 weeks <br />7.826885e-4 months <br /> on 9/21/94 was 0.2 mg/L. Due to the first sample above being greater than the 0.2 ]

mg/L permit limitation, another pair of samples was collected at 2147 hours0.0248 days <br />0.596 hours <br />0.00355 weeks <br />8.169335e-4 months <br /> and 2153 hours0.0249 days <br />0.598 hours <br />0.00356 weeks <br />8.192165e-4 months <br /> (back-up" ]

sample). The analyses results of these samples were 0.22 mg/L and <0.2 mg/L respectively. Since the l analyses. results of both "back-up" samples were less than or equal to the 0.2 mg/L permit limitation, the'  !

.two results that exceeded the 0.2 mg/L permit limitation are not considered by NMPC to be representative j of actual effluent conditions for the following reasons: J e Obtaining a completely mixed effluent sample is difficult at times because the only available l sample point is in close proximity to the detox addition point -

e The scheduled samples obtained immediately before and after the occurrences (as well as the "back-up" samples) were less than or equal to the 0.2 mg/L permit limitation  ;

e No detox or Clam-Trol feed rate anomalies were experienced  :

e Clam-Trol was being detoxified at a 2:1 ratio e Service water flow rates were relatively consistent e Values reported to the hundredths place are statistically insignificant *

• This conclusion is based upon information provided by Betz Chemical (manufacturer / supplier of Clam- l Trol or CT-1) regarding the CT-1 analytical test method for use of their product in industrial watcr l systems, and proper statistical protocol for reporting laboratory results pursuant to such procedures. Based upon this information, values beyond the tenth's digit are statistically insignificant and have no accuracy nor basis for reporting, ,

Immediate corrective actions: 1 The immediate analysis of "back-up" samples and the collection and analyses of additional samples as j described above.

1 Preventive (long termi corrective actions:

I NMPC does not consider the two values in question (0.21 mg/L and 0.22 mg/L) as an excursion, and we are in the process of revising our reporting procedures in accordance with the Betz protocol such that we  ;

will only be reporting values to the tenths, and not to the hundredths, for future Clam-Trol treatments.

. SECTION I

. . New York State Deoartment of Environmental Conservarlon . 3_ ,

DMsion of Water- '

• Report of Noncompliance- Event: W~

To: DEC Weter Contact William'F. McCarthy' DEC plegion:- ,7 l

- 4 J

Exceedence Report Types $ Day X Pennit Weimmen . Order Vh Anticipened N-:--- f - = .Bypsanovediow .,

SECTION 2 SPDES N: Ny. 000-1015 Facility: Nine Mile Point Nuclear Station Date of noncompliance: 09 f 19 f 94 t ,,,3,, ,,,,,,,, u,ic, ,, p,,, 3,,,io.): 007 Description of noncompliance (s) and cause(s):

See Attached

~

Has evsnt ceased (Yes (No) If so, when? 09/18/94 ws event dee to plant upset? (Yes)h SPDES limits violatsd?(No)

Start dite, time of evest: 09 , 18, 94 13 . 26 ggy g,, ,,,,, ,3., or ,,,,,: 09f 18 f94 20 16 (AM)

D:te time oral notification made to DEC7 09r23i 94 16 Hilliam F. McCarthv 15 (Q DEC omenas costseted:

immsdiste corrective actions: See Attached Prevsa6 tions term) corrective actions: See Attached l

l l

i SECTION 3 Complete this section if event was a bypass Bypass amount Was prior DEC authoruanon received for this evend (Yes)(No)

DEC Officini contactad: _ . Does of DEC approval: / /

Describe event la "Descripties of moecompliance end esmee" area in Sectice 2. Detail the start and end dates and times in Section 2 sise.

SECTION 4 Fecility Representative: '

Title:

(/d* * # #

Dak- /N/2'I/ W I '

Phone #: ( l$/

) SO I W Faz #: ( ) -

~

REPORT OF NON-COMPLIANCE EVENT (NY-000-1015)

SECTION 2 (Continued) i i

Description of noncompliance (s) and cause(s): ,

During the month of September, the Unit 2 Service Water Pump B Strainer was drained to a large sump. ,

'Ihis sump discharges to Lake Ontario via the Storm Sewer System on high level and is part of Outfall 007-(floor and equipment drains).

Samples were collected from the strainer discharge and were analyzed for pH, total suspended solids (TSS) y and oil and grease. The TSS result, as noted on the Outfall 007 DMR form, was 69.2 mg/L. Since this' '

strainer was drained to a large' sump, most of the solids (sand and silt) would have ' settled out prior to any' subsequent discharge. Therefore, it is most probable that any discharge from the sump would have been less than the permit limit of 50 mg/L and that the TSS result reported from the strainer discharge does not i represent an excursion.

Immediate Corrective Action: ,

f The practice of allowing equipment drainage or discharge after pH analysis and a visual inspection (for clarity) but prior to completion of Total Suspended Solids (TSS) and Oil & Grease (O&G) analyses has '

been suspended. SPDES analysis for pH and TSS is now required prior to equipment drainage or discharge.

Preventive (lone term) corrective actions:

The above immediate corrective action will remain in effect pending the implementation of an alternative m:thod for evaluating TSS concentration prior to a complete laboratory analysis.

\

J i

)

.)

DISCHARGE MONITORING REPORT PERMIT NUMBER NY-000-1015 NINE MILE POINT NUCLEAR STATION OCTOBER 1994 COMMENTS

1. Copper discharged from the Unit 2 Circulating Water System during Octeber 1994 originated from the Admiralty brass condenser tubes. Copper concentration in the Circulating Water System during October 1994 ranged from 104 ppb to 237 ppb (169 ppb average) total copper.

The total copper concentration in I2ke Ontario during October 1994 was maintained below 17 ppb as a result of the discharge of water from the Unit 2 Circulating Water System. The copper concentration in I2ke Ontario ranged from 2.0 ppb to 6.6 ppb (4.5 ppb average) total copper. The discharge of the Unit 2 Circulating Water System was through the normal system blowdown pathway during October 1994.

2. There was one discharge from the Unit 2 Waste Neutralizing Tank to the Site Sewage Treatment Plant during October 1994. The discharge was actually initiated on September 30,1994, at 2000 hours0.0231 days <br />0.556 hours <br />0.00331 weeks <br />7.61e-4 months <br /> and continued at a rate of approximately 13 gpm into October 4,1994. The discharge consisted of demineralized water. The volume discharged was approximately 60,000 gallons.

Water from the Waste Neutralizing Tank originated from repetitive testing and flushing of demineralized water from the portable demineralized water unit in use at Unit 2.

3. Betz Slimicide C-94, a bromine based biological fouling control chemical, was added to the Unit 2 Service Water System during October 1994. The addition followed the requirements of the NYSDEC, as contained in Niagara Mohawk's request dated July 10, 1991, and the Department's subsequent approval dated March 16, 1992. The concentrations of total residual halogen (TRH) did not exceed the discharge limitation of 0.2 mg/L as determined from analysis of grab samples collected from the Service Water System during discharge.

4. On the attached SPDES DMR forms " NODI C" was noted for Unit 1 Outfall 010 and Unit 2 Outfall 040, as there were no Clam-Trol additions during October 1994.

5. The Unit I strip chart recorder used to measure Outfall 010 (Condenser Cooling Water) discharge temperature difference provided AT values that were too low for all of October,1994. Therefore, Process Computer (P-log) records were used for this time period. The calibration of the recorder may have been out of specification and/or an electronic component failure may have occurred.

Investigation / repair has been initiated. Also, due to the age of the recorder (and associated electronics, etc.) and recurring operability concerns, replacement with more modern equipment has been approved and will be scheduled for either late 1994 or after the 1995 Refuel Outage.

6. In September, a small leak was identified from the Unit 1 Make-up Demineralizer System. The system is no longer in active service. The leak was from the make-up valve to the precipitator tank and was causing the tanks' overflow line to discharge water (lake water) at a very low flow rate (estimated at <0.5 gpm), to a small stone filled concrete pit near the Sewage Treatment Plant Pump Station. Overflow from this pit would flow through stone (gravel) to the Northwest drainage ditch eventually flowing to 12ke Ontario. This system is associated with Outfall 021. The discharge associated with this event is of no environmental significance. During October, valving associated with this system was reconfigured to allow flow to the permitted outfall.

DISCHARGE MONITORING REPORT PERMIT NUMBER NY-000-1015

. NINE MILE POINT NUCLEAR STATION NOVEMBER 1994 COMMENTS

1. No pre-printed DMR form was received for Outfall 022 (Security Building Air Conditioning). There were no discharges from this outfall directly to Lake Ontario (receiving water body) during November 1994. Any discharge during November 1994 was directed to the site sewage treatment facility.

2. Copper discharged from the Unit 2 Circulating Water System during November 1994 originated from the Admiralty brass condenser tubes. Copper concentration in the Circulating Water System during November 1994 ranged from 83 ppb to 275 ppb (156 ppb average) total copper.

The total copper concentration in Lake Ontario during November 1994 was maintained below 17 ppb as a result of the discharge of water from the Unit 2 Circulating Water System. The copper concentration in Lake Ontario ranged from 2.4 ppb to 7.6 ppb (4.0 ppb average) total copper. The discharge of the Unit 2 Circulating Water System was through the normal system blowdown pathway during November 1994.

3. Betz Slimicide C-94, a bromine based biological fouling control chemical, was added to the Unit 2 Service Water System during November 1994. The addition followed the requirements of the NYSDEC, as contained in Niagara Mohawk's request dated July 10,1991, and the Department's subsequent approval dated March 16, 1992. The concentrations of total residual halogen (TRH) did not exceed the discharge limitation of 0.2 mg/L as determined from analysis of grab samples collected from the Service Water System during discharge.

4. On the attached SPDES/DMR forms, " NODI C" was noted for Unit 1 Outfall 010 and Unit 2 Outfall ,

040 as there were no Clam-Trol additions during November 1994. Also, for Unit 2 Outfall 041, since all pH analyses fell within the 6.0 to 9.0 range, " NODI C" was noted for the pH range of 4.0 to 9.0.

5. The Unit I strip chart recorder used to measure Outfall 010 (Condenser Cooling Water) discharge temperature difference provided AT values that were too low during November 1994. Therefore, ,

Process Computer (P-log) records were used for this time period. However, during late November, station personnel were able to transfer the AT computer point to a strip chart " trend" recorder to provide a continuous record of the correct AT values. From this time on, the " trend" recorder was used for the AT values.

The calibration of the original recorder may have been out of specification and/or an electronic component failure may have occurred. Investigation / repair has been initiated. Also, due to the age of the original recorder (and associated electronics, etc.) and recurring operability concerns, replacement with more modern equipment has been approved and will be scheduled for either late 1994 or after the 1995 Refuel Outage. ,

I

DMR, NY-000-1015 ,

Nov.1994, Pg. 2

6. Copper-Trol, an azole-based copper corrosion inhibitor, was added to the Unit 2 Circulating Water System on November 1,1994. The addition followed the requirements of the NYSDEC as contained in Niagara Mohawk's request dated September 11,1989, and the Department's subsequent approval dated November 11,1989. Results of on-line corrosion monitoring indicate the copper loss from the condenser tubes has decreased appreciably from system design specifications as a result of Copper- '

Trol use.

7. On November 14, 1994, the Unit 1 oil spill catchment basin was discharged because the basin was near it's maximum design level (due to precipitation), which required it to be discharged. In the event the basin was allowed to exceed this level, then there would not be complete assurance that the maximum credible oil spill would 'be contained. This outfall is presently being added to the SPDES Discharge Permit. Prior tc the discharge, an oil and grease sample was obtained and was found to contain 5.6 mg/ liter oil and grease. A sample for pH was also obtained and provided a result of 7.2.

The volume discharged was approximately 125,660 gallons of water. .

8. Nalco Acti-Brom 1338, a bromine based biological fouling control chemical, was added to the Unit 1 Service Water System during November 1994. The addition followed the requirements of the NYSDEC, as contained in Niagara Mohawk's request dated July 10,1991, and the Department's subsequent approval dated March 16, 1992. The concentrations of total residual halogen (TRH) did not exceed the discharge limitation of 0.2 mg/L as determined from analysis of grab' samples collected from the Service Water System during discharge.

l l

l ovann l

1

DISCHARGE MONITORING REPORT

, PERMIT NUMBER NY-000-1015

~

NINE MILE POINT NUCLEAR STATION DECEMBER 1994 COMMENTS

1. On the attached SPDES/DMR forms, " NODI C" was noted for Unit 1 Outfall 010 and Unit 2 Outfall 040 as there were no Clam-Trol additions during December 1994. Also, " NODI C" was noted for Outfall 010 Total Copper as a grab sample is only to be obtained during condenser tube cleaning operations. However, a December baseline grab sample result for Total Copper was <0.02 mg/L.

2. During December 19M, Quarterly Action Level samples were taken for applicable outfalls as described on page 7 c 16 of the Nine Mile Point SPDES Permit. The results are as follows:

a. Outfall 007 Storm Water Drainage Parameter Action Level Rentils Zinc 0.2 mg/L 0.072 mg/L Barium 1.5 mg/L 0.028 mg/L Manganese 1.0 mg/L <0.025 mg/L

b. Outfall 040 Cooling Tower Blowdown & Service Water (Unit 2)

Parameter Action Level Results Iron 1.0 mg/L 0.185 mg/L

c. Outfalls 011 & 041 Units #1 and #2 Wastewater Parameter Action Level Results Phenolics 1.0 mg/L <0.005 mg/L (undetected)

Ents: Results for Outfall 041 only as there were no Outfall 011 discharges during December 1994

d. Outfall 020 Storm Water Drainage - Unit 1 Parameter Action Level Results Zinc 0.45 my , <0.25 mg/L Aluminum 0.5 mgt < 0.1 mg/L 1ron

• 0.3 mg/L 0.401 mg/L l

• Action level exceeded for Outfall 020 iron. The immediate corrective action was to begin a short-term, l high-intensity monitoring program for this parameter, as described on page 7 of 16 of the Permit. This action level exceedance and initiation of a short-term, high-intensity monitoring program was conveyed to NYSDEC Region 7 (Mr. Wm. McCarthy) on January 13,1995, via a faxed message at 1930 hours0.0223 days <br />0.536 hours <br />0.00319 weeks <br />7.34365e-4 months <br />.

4

DISCHARGE MONITORING REPORT PERMIT NUMBER NY-000-1015 NINE MILE POINT NUCLEAR STATION DECEMBER 1994 COMMENTS CONTINUED Preventative (long-term) corrective actions may include, but are not necessarily limited to: (1) obtaining additional samples from other sources (i.e., U2 Reactor Building mat drainage, well water from near by residents) to determine ground water iron levels and, (2) locating an alternate sampling location (from the last storm sewer manhole prior to the outfall) to eliminate collection of settled solids from gravel / sand that Lake Ontario wave action has deposited in the mouth of the storm sewer discharge pipe. The results of this monitoring will be submitted by the end of March 1995, as required by the Permit.

3. During January 1995, while a Chemistry Supervisor at Unit 2 was observing a Service Water Biocide addition, a technician questioned the practice of disposing of waste chemicals from the Hach DR100 Colorimeter into the Service Water intake canal. These chemicals consist of DPD-free chlorine reagent powder pillows contents mixed in 10 ml of Service Water (lake water).

This disposal practice was stopped and a properly labeled waste bottle has been placed in the DR100 instrument cabinet for collection and disposal. This appropriate measure will prevent this situation from occurring in the future.

I t

(AMS95.010) l 1