RBG-43-503, Forwards Nonroutine Repts Sent to Other Agencies,Per App B (Environ Protection Plan) to River Bend Station License NPF-47

Forwards Nonroutine Repts Sent to Other Agencies,Per App B (Environ Protection Plan) to River Bend Station License NPF-47

ML20135A051
Person / Time
Site:	River Bend
Issue date:	11/21/1996
From:	Chapman P ENTERGY OPERATIONS, INC.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
RBG-43-503, NUDOCS 9612030053
Download: ML20135A051 (28)

Text

_ _. . _... _ ._ _ __ __ .- - _

s

= ENTERGY l"f Bi re ?1:17e ? " "

PO Box 220 St. Francisvine. LA 70775 November 21,1996 U.S. Nuclear Regulatory Commission Document Control Desk Mail Stop P1-37 Washington, D.C. 20555

Subject:

Nonroutine Reports File No. G9.25.1.4 RBG-43,503 Enclosed are nonroutine reports sent to other agencies, pursuant to Appendix B (Environmental Protection Plan) to River Bend Station License Number NPF-47. I If there are any questions, please contact me at (504) 381-4389.

l l

Sincerely, l A N.

Pamela W. Chapman Coordinator-Environmental  !

enclosure Il cc: U. S. Nuclear Regulatory Commission 611 Ryan Plaza Drive, Suite 400 u

g) l Arlington, TX 76011 l 0200S3 9612030053 961121 PDR ADOCK 05000458 P PDR

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===ENTERGY l"7E2;'" "* '"*- l Po Box 220 i St Franctsvme LA 70775 I I

l January 22,1996 Mr. Gary Aydel Administrator 1

Water Pollution Control Division l

Louisiana Department of Environmental Quality P.O. Box 82215 Baton Rouge, LA 70884-2215

Subject:

Monitoring of Outfalls 002 and 003 1 i

Reference:

Permit No. LWDPS WP0409 File No.: G10.11.3 ,

RBG - 42,374

Dear Mr. Aydel:

Per the January 9,1996 telephone conversation with Mr. Percy Harris of your Permits Program Section, we are documenting our request to change the manner in i which we monitor for compliance discharges at Outfalls 002 and 003.

Outfall 002 is low volume waste which is discharged to the Mississippi River via l Outfall 001. Outfall 003 is non-radioactive floor drain and oil / water separator wastewaters discharged to Grants Bayou. Both consist ofinternal discharges.

Outfall 002 consists of five different internal discharges. Currently, permit compliance monitoring is accomplished by sampling each internal discharge once per week if there has been flow. Since our discharge permit requires monitoring only once per week, we feel that past permit interpretation of appropriate sample collection greatly exceeded our monitoring requirements. Evidence of this excess is available by reviewing the Frequency of Analysis column from past Discharge Monitoring Reports. For 1995, the frequency of analysis for Outfall 002 ranged from seven to twelve samples per month. The frequency of analysis for Outfall 003 ranged from six to thirteen samples per month.

\ . .

Monitoring of Outfalls 002 and 003 January 22,1996 RBG - 42,374 .

Page 2 of 2 l Therefore, we would like to adhere to our discharge permit requirement by sampling these outfalls only once per week. We would like concurrence from your office on this issue. We will presume consent if no response to this request is received within ,

thirty (30) days. If there are any questions or comments please contact me at (504) l 381-4389. l Sincerely, hhntA1-Pamela W. Chapman f

Coordinator-Environmental l

cc: Ms. Jane Fontenot, Chief Water Management Division l

Permits issuance Section (6W-PS) J U.S. Environmental Protection Agency, Region VI 1445 Ross Avenue Dallas, TX 75202-2733  :

NRC Resident inspector P.O. Box 1051 St. Francisville, LA 70775 l

1 l

e cz~ENTERGY l".'5"le?!*J""*'"*!

PO Box 220 (

St Francisville. LA 70775 l l

l l

l I

I i

February 29,1996 Mr. Gary Aydel j Administrator l Water Pollution Control Division Louisiana Department of Environmental Quality P.O. Box 82215 Baton Rouge, LA 70884-2215

Subject:

Request for Permit Reductions

Reference:

Permit No. LWDPS WP0409 File No.: G10.11.3 RBG - 42,595 l

Dear Mr. Aydel:

As discussed and directed by Mr. Percy Harris and Mr. Ron Gray with your Permits Program Section during their February 23,1998 site visit, we are requesting that the I attached permit reductions be considered during your preparation of our draft permit.

If there are any questions or if additionalinformation is needed, please contact me at (504) 381-4389.

Sincerely, -

1LA Al. 6/OW \

Pamela W. Chapman Coordinator-Environmental j

i

)

, .s s . .

cc: Ms. Jane Fontenot, Chief Water Management Division Permits issuance Section (6W-PS)

U.S. Environmental Protection Agency, Region VI ,

1445 Ross Avenue  !

Dallas, TX _75202-2733 l NRC Resident inspector P.O. Box 1051 St. Francisville, LA 70775 i

i O

I

Requested Permit Reductions e Outfall 001

1. Change maximum temperature limit from 99 to 110 and replace average temperature limit of 97 with reporting only.

Justification: Temperature is measured prior to mixing with the Mississippi River as required by the Permit. Since this would be considered a conservative measurement, it is highly unlikely that raising the maximum temperature limit to 110 will affect water quality or aquatic biota due to the enormous dilution provided by the Mississippi River. In addition, the maximum limit of 110 is consistent with our Arkansas and Louisiana sister nuclear plants.

Since average temperature measurements in 1995 (see Attachment 1) ranged from a minimum of 75 to a maximum of 90, and a maximum limit of 110 will remain in place, removing the average temperature limit of 97 and replacing with reporting only, will not affect the quality of water discharged or impact the environment.

2. Remove oil & grease monitoring requirement.

Justification: This requirement is self-imposed, unnecessary and has no limits associated with it. In addition, there exists a redundancy in monitoring since oil & grease is already monitored at Outfall 002, which combines with 001. Oil & grease results for 1995 (see Attachment I) ranged from a minimum of 0.3 mg/l to a maximum of 3.0 mg/l and have demonstrated no upward trends. Therefore, the monitorii.g of we.er quality will continue to be adequate.

3. Remove free available chlorine (pounds per day) requirement.

Justification: A dechlorinating agent (sodium bisulfite)is added to remove chlorine prior to final discharge at this outfall. In 1995, no detectable chlorine was measured (see Attachment I). Therefore, pounds per day was 0. Since limits are in place to restrict discharge time and chlorine concentrations, and the fact that the final discharge is dechlorinated, removing this requirement will not affect the monitoring of water quality.

RBSNPDES 2

Requested Permit Reductions e Outfal1002

1. Change total suspended solids monitoring frequency from weekly to once per month.

Justification: Wastewater from this outfall is treated to remove solids prior to discharge. Results for 1995 ranged from a minimum of 0 mg/l to a maximum of 16.3 mg/l (see Attachment 1). Since this wastewater is treated prior to discharge and results have demonstrated no upward trend, reducing monitoring frequency will not affect the monitoring of water quality.

2. Replace oil & grease monitoring requirement with total organic carbon.

Justification: Total organic carbon (TOC) analyses are less labor intensive and more conservative than oil & grease analyses. In addition, TOC analyses would be more representative of actual water quality.

Therefore, the integrity of water quality would continue to be monitored.

3. Change oil & grease monitoring frequency from weekly to once per month.

Justification: Wastewater from this outfall is treated prior to discharge.

As seen in Attachment I, oil & grease results for 1995 ranged from a minimum of 0.3 mg/l to a maximum of 9.2 mg/l and have demonstrated no upward trend. Although a request is being made to replace the oil &

grease parameter with TOC,1995 results have shown no problems with this outfall. Therefore, changing the monitoring frequency from weekly to once per month will not affect the monitoring of water quality.

4. Sample radioactive wastewater for compliance while the batch tank is being recirculated and prior to discharge.

Justification: This would allow verification of permit compliance prior to actual discharge and would allow reprocessing should permit parameters be exceeded during the monitoring process. For additional explanation, refer to letter (RBO-41,527) dated May 16,1995 to Mr. Dale Givens shown in Attachment 11.

RBSNPDES-3 j

3

,e w . . i Requested Permit Reductions

5. Monitor only one internal discharge from Outfall 002 once per month.

I Justification: Sampling each internal outfall discharge was selfimposed j and exceeded monitoring requirements. In addition, wastewater from j

' these internal outfalls receive treatment prior to discharge and is reflected j by the 1995 analysis results shown in Attachment 1. Therefore, the i monitoring of water quality would continue to be met. For additional explanation, see letter (RBG-42,374) dated January 22,1996 to Mr.

Gary Aydel shown in Attachment II.

6. Route ion-exchange intemal discharge to stormwater Outfall 006.

Justification: This intemal discharge consists of concentrated well water and would allow case of process operation with minimal affect on the environment. In addition, our sister nuclear plant in Mississippi, )

which is already discharging identical concentrated well water to a storm drain, has performed tests to ensure that no adverse impact to the environment would occur. Therefore. this activity would not  !

affect the quality of water discharge or impact the environment.  !

For additional explanation, refer to letter (RBG-41,527) dated i May 16,1995 to Mr. Dale Givens.

. Outfalls 003,005,006,007 and 009

1. Combine Outfalls 003,005,006,007 and 009 into one common outfall at Grants Bayou Bridge on Louisiana Highway 965.

Justification: Currently, Outfall 003 consists of well water with Outfalls 005,006,007 and 009 consisting of stormwater. In addition, by combining these outfalls into one common outfall, excessive sampling can be discontinued while still monitoring stormwater runoff from the site.

Since the point at Grants Bayou Bridge is a sampling location that encompasses all these outfalls, the monitoring of water quality would continue to be met.

i l

I RBSNPDES-4

Requested Permit Reductions

2. Delete oil & grease monitoring requirements and measure for pH, total organic carbon and flow on a quarterly basis only.

Justification: TOC analyses are less labor intensive and more conservative than oil & grease analyses. In addition, TOC analyses would 3 be more representative of actual water quality. As seen below and shown in Attachment I, oil & grease results for 1995 have demonstrated no upward trend. Although a request is being made to replace the oil &

grease parameter with TOC,1995 results have shown no problems with this outfall. Therefore, the integrity of water quality would continue to be met. For additional explanation, refer to letter (RBG-40.401) dated 1 March 22,1994 to Mr. Dale Givens shown in Attachment II.

Outfall Oil & Grease Results (mg/I)

Min. M ax.

003 0.9 10.0 005 NA 5.4 j 006 2.1 4.7 l l

007 0.1 3.9 009 NA 2.5

3. Change monitoring frequency for pH, total organic carbon and flow  !

to a quarterly basis. j Justification: As seen below and shown in Attachment I, industrial activities occurring at the site are not affecting the quality of stormwater . -)

runoff. In addition due to housekeeping practices that are incorporated into our daily plant operations, it is unlikely that site runoff will impact water quality or the environment. Therefore decreasing monitoring frequencies will not affect the quality of water discharged.

Outfall pH TSS O&G TOC Min. Max. Min. Max. Min. Max. Min. Max.

003 6.33 7.91 0.5 14.6 0.9 10.0 NA NA 005 6.11 8.97 NA NA NA 5.4 NA 11.1 006 6.96 8.54 NA NA 2.1 4.7 4.4 16.9 007 7.20 8.96 NA NA 0.1 3.9 4.2 13.9 009 6.81 8.62 NA NA NA 2.5 NA 13.8 RBSNPDES-5

Requested Permit Reductions

3. Include condensate discharge from backup diesel air compressors as  !

an internal discharge of this combined outfall.

Justification: This has already been approved by your department for discharge to stormwater Outfall 0% and will continue to be monitored l as part of the combined outfall. Therefore, the monitoring of water l would continue to be met. For additional explanation, refer to the Department of Environmental Quality letter (Reference Number WP0409) dated August 10,1995 to Mr. Keith Stoma shown in Attachment II.

. Outfall 004

1. Reduce monitoring frequency for BOD, pH and TSS from weekly to monthly.

Justification: As seen below and shown in Attachment I, results are consistently below permit limits and are demonstrating no upward trends. Therefore, reducing the monitoring frequency will not affect the quality of water discharged.

Parameter Results (mg/l) Results (mg/l) 4 Min. Max.

BOD 0.58 6.40 pH 6.59 7.54 TSS 0 13.0

. Outfall 102

1. Eliminate Outfall 102.

Justification: As seen in Attachment 1. no discharges occurred at this outfall during 1995 and none are anticipated in the near future. Based on this outfall being inactive the majority of time, approval to discharge could be obtained from the state on an as-needed basis.

RBSNPDES-6

I ATTACHMENTI River Bend Station NPDES Data Summary i

Monitoring Period: Januarv - December 1995 RBSNPDES-7

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RIVER BEND STATION OUTFALL 001 l (COOLING TOWER BLOWDOWN)

Page 1 of 2 Monthi Temperature - pH Oil & Grease

• Flow Year (Flow Weighted) (s.u.) (mg/l) (mgd) i (F)

Avg. l Max. l Min. l Max. l Avg. l Max. l Avg. l Max. l NPDES l l l l l l l l Limit 92 22 M M RnEDIt Etanti Rd" RegnIt Jan'95 76 84 7.42 7.95 1.3 2.7 3.205 3.774 Feb'95 76 83 7.48 7.96 0.7 0.9 2.873 3.910 Mar '95 79 87 7.18 8.24 0.5 0.9 1.180 3.686 l Apr '95 84 90 7.31 8.28 1.0 1.7 2.223 3.880 May '95 89 92 7.39 7.92 0.3 0.4 3.076 3.837 Jun'95 90 93 7.70 7.96 1.1 2.5 3.499 4.432 Jul '95 90 l 93 7.89 8.31 1.4 2.0 3.969 4.396 Aug '95 88 90 7.49 8.28 1.6 3.0 3.533 4.540 Sep '95 86 89 7.52 8.38 0.4 1.2 3.352 5.923 Oct '95 81 86 7.53 8.04 1.0 1.5 4.455 4.464 Nov '95 77 85 7.33 7.67 1.5 2.0 4.264 4.949 l Dec '95 75 86 7.31 7.97 1.2 1.9 4.058 4.456 MIN.

VALUE 75 7.18 0.3 1.180 MAX.

VALUE 90 93 8.38 1.6 3.0 4.455 5.923

• State imposed only

" EPA imposed limit only 2-

RIVER BEND STATION OUTFALL 001 t

t (COOLING TOWER BLOWDOWN)

Page 2 of 2 j Month / Free Available Free Available Total Zinc Year Chlorine Chlorine (mg/l)

(lbs/ day) (mg/l) 4 Avg. l Max. l Avg. l Max. l Avg." l Max. l

! NPDES l l l l l l Limit 11 ;L2 (L2 DJ 1A 1.Q

}

Jan '95 0 0 0 0 0.202 0.230

! Feb '95 0 0 0 0 0.143 0.163 Mar '95 0 0 0 0 0.113 0.139 Apr '95 0 0 0 0 0.149 0.190 ]

May '95 0 0 0 0 0.388 0.475 Jun '95 0 0 0 0 0.236 0.411 Jul '95 0 0 0 0 0.173 0.194 Aug '95 0 0 0 0 0.206 0.252 Sep '95 0 0 0 0 0.263 0.294 Oct '95 0 0 0 0 0.251 0.285 Nov '95 0 0 0 0 0.227 0.334 Dec '95 0 0 0 0 0.177 0.301 MIN.

VALUE O O 0.113 MAX.

. VALUE O O O 0 0.388 0.475

> I

• EPA imposed only 3-4

RIVER BEND STATION OUTFALL 002 (LOW VOLUME WASTE) i 4 Month / Total Oil & Grease Flow Year Suspended (mg/l) (mgd)

Solids (mg/l)

Avg. l Max. l Avg. l Max. l Avg. l Max. l NPDES l l l l l l Limit 3.0 10D 15 2Q Report Report Jan '95 0 0 1.9 5.8 0.024 0.076 Feb'95 0.1 1.0 1.1 9.2 0.040 0.204 Mar '95 0.064 0.400 1.0 2.2 0.026 0.106 Apr '95 0.9 1.4 0.3 2.0 0.046 0.283 May '95 1.4 8.0 1.5 2.4 0.043 0.093 Jun '95 1.3 6.6 0.6 2.1 0.033 0.077 Jul '95 2.1 16.3 1.6 2.8 0.036 0.092 Aug '95 0.4 2.4 1.1 2.8 0.044 0.076 Sep '95 0.3 1.0 1.0 2.7 0.027 0.057 oci.e5 ,.e 4.e 4.0 3.1 Om7 0.,4e i

Nov '95 0.4 3.4 1.2 3.5 0.032 0.068 Dec '95 0.6 2.4 1.4 3.1 0.032 0.089 MIN.

VALUE O 0.3 0.024 L

MAX.

VALUE 2.1 16.3 1.9 9.2 0.047 0.283 i

RIVER BEND STATION OUTFALL 003 (LOW VOLUME WASTE)

~

Month / pH Total Oil & Grease Flow Year (s.u.)  ; Suspended (mgII) (mgd)

' Solids (mg/l) l Min. l Max. l Avg. l Max. l Avg. l Max. l Avg. l Max. l NPDES l l l l l l l l l Limit fLQ SA 3Q 10D 15 20 Reoort Report Jan '95 6.63 7.20 0.5 1.2 2.2 10.0 0.003 0.048 Feb'95 6.51 7.11 4.5 5.0 1.5 2.6 0.002 0.023 Mar '95 6.47 6.95 1.0 3.4 0.9 3.4 0.005 0.066 Apr '95 6.58 7.03 2.9 6.2 2.1 4.4 0.004 0.049 May '95 6.69 6.98 3.7 5.9 2.0 3.8 0.003 0.033 Jun'95 6.44 7.30 1.0 2.8 1.9 3.6 0.001 0.012 Jul '95 6.64 7.31 11.3 14.6 1.9 5.0 0.002 0.021 Aug '95 6.82 7.48 4.2 13.0 2.0 5.5 0.002 0.013 Sep '95 6.59 7.18 6.1 8.0 2.1 3.0 0.0003 0.006 Oct '95 6.61 7.91 8.4 9.0 1.9 5.3 0.001 0.020 Nov '95 6.33 7.22 3.4 5.4 2.0 4.2 0.002 0.018 Dec '95 6.34 7.30 1.8 3.4 1.7 5.1 0.003 0.037 MIN. -

VALUE 6.33 0.5 0.9 0.0003 MAX.

VALUE 7.91 14.6 2.2 10.0 0.005 0.066 I

i 1

l 5-l

i RIVER BEND STATION OUTFALL 004 l i I (SANITARY SEWAGE) l

Month / BOD,5 Day pH Total i Flow Fecal l Year (mg/l) (s.u.) Suspended (mgd) Coliform "

Solids (CFS/100 j (mg/l) mi)

Avg. l Max. l Min. l Max. l Avg. l Max. l Avg. l Max. l Avg. Max.

NPDES Limit 3D M M M 20 M OAP Rett 200 MD Jan'95 0.88 1.27 6.59 7.17 0 0 0.015 0.024 Feb '95 2.76 4.26 6.98 7.27 2.8 4.2 0.015 0.021 0 0 Mar '95 3.04 5.22 7.05 7.38 2.9 3.2 0.014 0.021 Apr '95 0.95 2.035 6.75 7.22 2.5 6.8 0.015 0.022 0 0

• *" -~

May '95 0.59 1.37 6.89 7.38 1.0 3.8 0.014 0.022 Jun'95 1.18 2.06 6.80 7.42 0 0 0.012 0.024 Jul '95 0.58 0.98 6.77 7.37 0.8 2.0 0.012 0.018 0 0 Aug '95 1.77 2.66 7.05 7.54 2.1 5.0 0.013 0.021 Sep '95 1.99 1.99 7.23 7.23 4.0 4.0 0.003 0.017 0o,.95 Nov '95 3.36 6.40 7.18 7.54 6.5 13.0 0.011 0.055 Dec '95 1.31 3.00' 7.08 7.38 2.9 3.8 0.031 0.214 0 0 MIN.

VALUE 0.58 6.59 0 0.003 0

~

MAX.

VALUE 3.36 6.40 7.54 6.5 13.0 0.031 0.214 0 0 j

"* Quarterly frequency only

• EPA imposed limit only

" State imposed only "" No discharge due to start-up of new wastewater facility.

I 6-i

e , ..

I RIVER BEND STATION OUTFALL 005 f (STORMWATER)

MonthI pH Oil & Grease Total Flow Year (s.u.) (mg/l) Organic (mgd)

Carbon (mg/l)

]

l Min. l Max. l Max. l Max. l Avg. Max. l I l l l l NPDES l l Renort Egged Limit 5.0 M 15 50 Jan'95 8.00 8.21 1.4 5.8 0.019 0.323 Feb '95 7.78 8.39 0.6 5.1 0.011 0.148 Mar '95 7.63 8.40 0.2 6.8 0.031 0.439 l Apr '95 7.77 8.97 1.0 5.7 0.027 0.325 May '95 7.63 8.38 2.5 4.8 0.022 0.221 Jun '95 6.11 7.59 4.1 6.3 0.010 0.080 l Jul '95 7.38 7.84 1.4 6.8 0.014 0.140 Aug '95 7.50 8.28 2.8 11.1 0.011 0.085 Sep '95 0.002 0.043 Oct '95 7.30 7.98 3.6 8.9 0.009 0.136 Nov '95 7.77 7.92 2.3 8.7 0.014 0.123 Dec '95 7.73 8.37 5.4 6.5 0.019 0.247 MIN.

VALUE 6.11 0.002 MAX.

8.97 5.4 11.1 0.031 0.439 VALUE

• No samples due to low rainfall.

7

f RIVER BEND STATION OUTFALL 006 (STORMWATER)

Monthl pH . Oil & Grease Total Organic Flow

. Year (s.u.) j (mg/l) Carbon (mgd)

j (mg/l)

! l Min. Max. l Avg.' l Max. Avg." Max. l Avg. l Max. l NPDES l l l l l l l Limit fa 24 Report 15" Report 50" Reoort BARett Jan'95 7.91 8.52 1.6 2.2 5.3 9.8 0.232 5.568 Feb '95 7.78 8.22 0.004 1.5 5.6 5.6 0.141 2.191 Mar '95 7.37 8.54 0.7 1.4 5.8 16.9 0.410 7.590 Apr '95 7 13 8.10 0.05 1.7 4.8 5.7 0.396 5.604 May '95 6.96 7.89 0.03 1.2 5.3 11.4 0.269 3.784 l Jun'95 7.40 8.32 2.1 2.6 6.4 10.0 0.059 0.655 Jul '95 7.74 ~ 7.92 1.5 2.1 4.4 9.3 0.134 1.957 i Aug'95 7.56 8.11 0.7 2.8 9.4 9.6 0.053 0.734 Sep '95 7.35 7.35 0.8 0.8 11.2 11.2 0.007 0.190

Oct '95 7.40 8.10 0.5 4.7 4.8 13.8 0.076 1.863 Nov '95 7.79 8.05 0.9 2.2 6.9 14.7 0.096 1.511 Dec '95 7.50 7.97 0.2 2.2 6.6 13 6 0.232 4.248 MIN.

VALUE 6.96 0.004 4.4 0.007 MAX.

VALUE 8.54 2.1 4.7 11.2 16.9 0.410 7.590 <

• State imposed only

" EPA imposed limit only 8

RIVER BEND STATION OUTFALL 007 (STORMWATER) l Monthi pH  ;

Oil & Grease  ; Total Organic Flow Year (s.u.)  ! (mg/l) I Carbon (mgd)

(mg/l)

]

l Min. l Max. l Avg.* l Max. l Avg.' l Max. l Avg. l Max. l l NPDES l l l l l l l l l ,

Limit SJ SA Reno.t1 15" Reoort EQ" Report Report l

Jan'95 7.92 8.25 1.4 2.1 7.0 13.1 0.250 5.960 Feb'95 7.70 8.61 0.1 1.9 8.3 8.9 0.153 2.327 Mar '95 7.61 8.47 1.0 2.6 7.9 9.1 0.440 8.128 Apr '95 7.55 8.81 0.4 1.1 8.6 11.6 0.426 5.999 May '95 7.75 7.92 0.47 0.53 8.1 10.3 0.296 4.048 Jun'95 8.01 8.21 0.9 1.3 9.6 10.3 0.058 0.664 Jul '95 7.66 8.96 1.4 1.5 12.5 13.9 0.140 2.071 Aug '9,5 7.90 8.09 0.8 3.9 8.7 9.8 0.054 0.749 Sep '95 7.40 7.40 1.2 1.2 8.4 8.4 0.006 0.187 1.6 4.2 10.4 0.080 1.970 i Oct '95^ 7.20 8.27 1.5 Nov '95 7.99 8.42 0.2 2.9 9.2 13.1 0.098 1.587 Dec '95 7.80 8.81 0.1 2.2 8.1 10.6 0.243 4.545 MIN.

VALUE 7.20 0.1 4.2 0.006 MAX.

VALUE 8.96 1.5 3.9 12.5 13.9 0.440 8.128

• State imposed only

. " EPA imposed limit only l

l RIVER BEND STATION OUTFALL 008 (LOW VOLUME WASTES) l Month / pH l Total Oil & Grease Flow Year (s.u.) j Suspended (mg/l) (mgd)

Solids i (mg/l) l l Min. l Max. l Avg. l Max. l Avg. Max. l Avg. l Max. l NPDES l l l l l l l l Limit SA LQ 3.0 100 15 20 Ritand Reoort Jan '95 Feb'95 7.84 7.97 0 0 0.9 2.0 0.0004 0.0038 Mar '95 Apr '95 May '95 7.10 7.10 0.6 0.6 0.2 0.2 0.005 0.005 Jun'95 6.65 6.65 1.4 1.4 0.42 0.42 0.001 0.030 Jul '95 j Aug '95 8.68 8.75 1.9 4.2 1.3 1.5 0.0001 0.0011 Sep '95 7.26 7.26 9.8 9.8 0.5 0.5 0.0001 0.0001 Oct '95 6.55 7.12 2.4 5.4 5.1 5.2 0.001 0.045 Nov '95 7.60 7.60 0.5 0.5 1.8 1.8 0.003 0.090 0,, .95 MIN.

VALUE 6.55 0 0.2 0.0001 MAX.

VALUE 8.75 9.8 9.8 5.1 5.2 0.005 0.090

• No discharge l

8 .

RIVER BEND STATION OUTFALL 009 *

(STORMWATER)

Monthi pH ' Oil & Grease Total Flow

, Year (s.u.) (mg/l) Organic (mgd)

! Carbon (mg/l) f l Min. I Max.  ! Max. l Max. l Avg. l Max. l

NPDES l l l l l l l Limit SA LQ 15 5.0 Report Reoort Jan'95 7.98 8.20 1.7 9.0 0.045 1.019 Feb '95 7.86 8.62 1.9 5.6 0.017 0.215 j Mar '95 7.58 8.31 1.4 11.5 0.078 1.604 Apr '95 7.89 8.21 0.2 4.9 0.062 1.029 l May '95 7.29 7.83 1.6 6.71 0.039 0.503

Jun'95 7.52 7.69 0.9 13.8 0.014 0.117 j Jul '95 7.54 7.97 2.1 10.0 0.020 0.203 Aug '95 7.60 7.92 2.5 9.7 0.016 0.124

. Sep'95 " 0.002 0.063

. Oct '95 6.81 7.91 2.2 12.4 0.012 0.198 Nov '95 -7.43 7.82 1.7 5.1 0.020 0.179 i Dec '95 7.56 ' 8.20 1.4 11.0 0.036 0.637 i MIN.

VALUE 6.81 0.002 MAX.

VALUE 8.62 2.5 13.8 0.078 1.604

• EPA tr.1 posed only

" No samples due to low rainfall s

-1I-

1 s l RIVER BEND STATION OUTFALL 102 4 (CHEMICAL METAL CLEANING WATER) 1 Monthi TotalIron Total Copper Flow

Year (mg/l) (mg/l) (mgd) i Avg. Max. l Avg. l Max. l Avg. l Max.

NPDES l l l l Limit LQ LQ LQ 1& Report Report Jan '95 Feb '95 l -

l -

l -

l -

Ma, .95 - -

j l l l Apr '95 May '95 Jun'95 Jui 95 l

• l

• l

• l *

• i Aug '95

. Sep '95

om .e5 j l

• Nov '95 0,, .95

~

MIN.

• VALUE

MAX. * *

• 4 VALUE

,

• No discharge s  !

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l ATTACHMENT 11 i-Referenced Letters l

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==ENTERGY Po Bov220 St Francsville LA 70775 May 1,1996 Ms. Linda Levy Assistant Secretary Office of Water Resources Louisiana Department of Environmental Quality P.O. Box 82215 Baton Rouge, LA 70884-2215

Subject:

Station Sewage System Excursion

Reference:

Permit No. LWDPS WPO409 File No.: G1.11.2 RBG - 42,878

Dear Ms. Levy:

This letter is a written follow-up for a prompt notification of a sewage system excursion which occurred on April 23,1996.

A fecal coliform sample was obtained from the sewage system effluent on April 23 at 11:00 a.m.. The sample was analyzed in duplicate and the averaged result, obtained on April 24 at 2:00 p.m., was 493 fecal colonies per 100 milliliters. The station permit fecal coliform limits for Outfall 004, Sewage Treatment Plant, are 200 and 400 colonies per 100 milliliters, for daily average and daily maximum, respectively.

In 1995, a new sewage treatment lagoon system was constructed for River Bend Station. The system was put into operation in Septemt er of 1995, yet there was no effluent discharge until Nove:aber,1995. Our investigation indicates that the probable cause for the permit excursion was due to a high volume rainfall event, exceeding the capacity of the ultraviolet (UV) light disinfection system. A large rainfall event occurred on April 22, which increased the water level in the lagoon

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I Station Sewage System Excursion >  ;

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May 1,1996 RBG -'42,878 Page 2 of 2 i

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3 system and caused a temporary high effluent discharge rate which continued through April 23,1996.

Our corrective measures included resampling the sewage effluent discharge on April

- 24,1996, for another focal coliform analysis. The sewage effluent result obtained on April 25,1996, was O fecal colonies per 100 millileters, which indicates effectiveness of the bacteriological treatment system, in accordance with our permit, we will increase our sampling frequency for this parameter. All analysis results will be reported with our monthly Discharge Monitoring Reports for April and May,1996. In order to prevent recurrence, we plan to maintain appropriate effluent flow rates through the UV light system by manual operation of valves during high discharge flow periods. Also, since the new sewcge lagoon system remains in the start-up phase, we are reengineering the system to incorporate a UV light system capable of treating our maximum system discharge flow rate.

I certify under penalty of 15w that this document and all attachments were prepared under the direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted.

. Based on my inquiry of the person or persons who manage the system, or those ,

persons directly responsible for gathering the information, the information submitted i is, to the best of my knowledge and belief, true, accurate and complete. I am aware i that there are significant penalties for submitting false information including the j t

possibility of fine and imprisonment for knowing violations, Sincerely, 4,,s u. ym - \

Pamela W. Chapman Coordinator-Environmental PWC/pc

\

NYcz~ENTERGY

"".78% f=" " '"*'

! Po Box 220 l St Francs.1e. LA 70775 l

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June 20,1996 Ms. Linda Levy Assistant Secretary Office of Water Resources Louisiana Department of Environmental Quality P.O. Box 82215 Baton Rouge, LA 70884-2215 l I

Subject:

Permitted Outfall 006 pH Excursion l I

Reference:

Permit No. LWDPS WP0409 File No.: G1.11.2 RBG - 43,037 I

Dear Ms. Levy:

l This letter is a written follow-up for a prompt notification of a pH excursion at Outfall  !

006, stormwater runoff from the east side of the plant and previously monitored  ;

internal discharges, which occurred at River Bend Station on June 14,1996. Outfall l 006 discharges to Grants Bayou, Thompson's Creek and the Mississippi River.

1 Outfall 006 stormwater discharge monitoring was performed on June 14,1996 at 0928 hours0.0107 days <br />0.258 hours <br />0.00153 weeks <br />3.53104e-4 months <br />. The pH analysis result obtained was 10.32 SU. Resampling of the pH at the outfall was performed at 0948 hours0.011 days <br />0.263 hours <br />0.00157 weeks <br />3.60714e-4 months <br />. The pH analysis result obtained was 10.43 SU. -

Immediate investigation identified that construction activity on a new parking lot area was the cause of the pH excursion. The construction crew disked Portland Cement into the soil to form a hard base prior to pouring asphalt. During the application of the cement, a large rainfall event occurred. The cement caused the rise in pH at Outfall 006.

Additional pH samples were obtained from Outfall 006 on June 15,1996 at 0840 and 2008 hours0.0232 days <br />0.558 hours <br />0.00332 weeks <br />7.64044e-4 months <br />, with results of 7.51 SU and 8.53 SU.

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i Permitted Outfall 006 pH Excursion l June 20,1996 i RBG - 43,037 1 Page 2 of 2

~ Actions taken to prevent recurrence included meeting with contractors to stress  ;

environmental standards and expectations including proactive response in regard to l future construction work and its effect on discharge permit compliance.- l I certify.under penalty of law that this document and all attachments were prepared  ;

under the direction or supervision in accordance with a system designed to assure - i that qualified personnel properly gather and evaluate the information submitted. )

Based on my inquiry of the person or persons who manage the system, or those l persons directly responsible for gathering the information, the information submitted j is, to the best of my knowledge and belief, true, accurate and complete. I am aware J that there are significant penalties for submitting false information including the l possibility of fine and imprisonment for knowing violations.

J

=i Sincerely -  !

hd k]. bky&

Pamela W. Chapman Coordinator-Environmental i

cc: Capitol Area Regional Office i Water Pollution Control Division .

11720 Airline Highway Baton Rouge, LA 70817-1720

' NRC Resident inspector P.O. Box 1051 St. Francisville, LA 70775