ML20127L513

NPDES Noncompliance Notification:On 920108,14,15, & 16 Ph Was Low at 5.4,5.2,5.2 & 5.9,respectively Due to Plant Going Through Nitrification State Which Causes Acid Production. Operational Controls Implemented

ML20127L513
Person / Time
Site:	San Onofre
Issue date:	01/18/1993
From:	Marsh W SOUTHERN CALIFORNIA EDISON CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NUDOCS 9301270183
Download: ML20127L513 (4)

Text

. . - - .

'o.

rj-s t if JL Southem Califomia Edison Company PJ PAHKt.H Giftt' f, f ,

.lHVtNL, C AI le Onf* A 077ts f e t rp*w v4 W AL 1 f..H G. MAFtf3t e A8W 9 t aP# t 6.aM4are t a g 7 $ 41 **k4 .640, t94.M.L t A99 f allt}t M A HW* f Af F AW%

U. S. Nuclear Regulatory Commission Attention: Ducument Control Desk Washington, D.C. 20555 Gent?cmen:

Subjecti Docket No. 50-206 Report _of NPDES Permit Violation _ . .

. San Onofre Nuclear Generating Station Unit 1

Reference:

Letter H. W. Newton-(SCE) to A. L. Coe (California Regional Water Quality Control Board, San Diego Region),

NPDES Monitoring Report, October 30 -1992 Section 6.16.2.c of the Technica' Specifications to Facility' License No. OPR-13 for San Onofre Nuclear Generating Station (SONGS) . Unit 1 -requires-Southern California _ Edison (SCE) to report violations of the National 4

Pollutant Discharge Elimination System (NPDES) permit. This letter reports four NPDES violations for Unit 1. The referenced _ letter is provided as an

.cnclosure.

-During the month _of September all sampled water sources were found to be within permit limits with.the exception of-pH for the Mesa-Treatment Plant. -

'he pH limitations of 6 to 9 were exceeded on four: occasions. The violations occurred on September 8, 14, 15, and 16. -On all four occasions.the'pH was lei-- .

at 5.4, 5.2, 5.2, -and 5.9, respec tively.

The cause of the low pH is believed to-be a result of.the. treatment plant going through a nitrification _ state which causes acid production.- Operational i controls have been implemented and no subsequent violations have been experienced. In addition to the operational. control, supplemental addition.of buffering agents.are being used as needed to adjust.pH.

l 250152 - .

j[j (

i p m m s pj

y ,,

I O. S. Nuclear Regulatory Commission January:18,-1993 If you have any questions,-please contact me.

I Sincerely, lW Enclosure cc: J. B. Martin, Regional Administrator, NRC Region V J. O. Bradfute, NRC Project Manager, San Onofre Unit 1 C. W. Caldwell, NRC Senior Resident inspector, San Onofre Units 1, 253 R. F. Dudley, Section Chief, Non-Power, Decommissioning, ,

and Environmental Project, Directorate of Reactor Project-3, 4&5 p

. m . _ _ ._ . _ . . . ,

4

_ep_

= October 30, 1992 California Regional Water Quality control Board San Diego Region 9771 Clairemont Mesa Boulevard, Suite B San Diego, California 92124-1331 '

, Attention: Mr. Arthur L., Coc .

L .

Subject:

NPDES Monitoring Report

, San Onofre Nuclear Generating Station, Unit 1 The NPDES Discharge Monitoring Report (DMR) for San Onofre Unit 1 covering the month of September is submitted in accordance with-the requirements of Order No.88-001 (NPDES Permit No.

CA0001228). A summary of-the generating unit's status and significant analytical results is provided below.

The unit,was in operation all month and all sampled water sources-were four.d to be within permit limits with the exception of pH1 for the Masa Treatment Plant. The pH exceeded,the permit limitation (between 6 to 9) on September 8,114, 15,.and'16.- The pH values w'ere 5.4, 5.2, 5.2, and 5.9 respectively for those days. Fdison's investigation into the cause of the ' low pH' continues, but it is believed that the treatment-plant was in a nitrification state which caused acid production. Operationdl controls are being impleaented and no~ subsequent violations have. i

.b'cen experienced. In addition to-operational ~ control, +

supplemental addition of buffering. agents will"b'e used as needed

. to adjust Ph.

Pursuan,t to Order No.88-001, Reporting Requirement 12, the following representative has prepared and is. authorized to sign the reports required by this order: Robert M. Goodson, Environmental.E7gineer. ,

5 mi _ , .. _ v

_g Mr. Arthur L. Coe October 29, 1992 I certify under penalty of law that I have personally examined and an familiar document, with the and based on information my inquiry ofsubmitted in the attached those individuals immediately responsible for obtaining the information, I believe the submitted infornation is t ru e , accurate, and complete. I an aware that there are significant penalties for submitting falso infornation, including the possibility of fino and imprisonment.

• 0,4 i

D' H. W. NEWTON Manager, / Site Support Services rng:Ulsep92NPD Enclosure cc: Environmental Protection Agency, Region IX bec: R. M. Rosenblun H. W. Newton /M. J.

R. V. D. Reid Johnson - w/o enclosure 9\Q N. J. Mascolo - w/o enclosure G. E. Hammond - w/o enclosure K. T. Herbinson l CDM Files '

i EnvironmentalProtectionFiles((/[k [

l t

l f