ML20115B177
| ML20115B177 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 05/29/1996 |
| From: | Newton H SOUTHERN CALIFORNIA EDISON CO. |
| To: | Robertus J CALIFORNIA, STATE OF |
| Shared Package | |
| ML20115B169 | List: |
| References | |
| NUDOCS 9607090281 | |
| Download: ML20115B177 (3) | |
Text
. -
s J
)
w
.j i
t a
i Southem Califomia Edison Company
}
j' e, o. cox u.
'l SAN CLliMENTE. CAUPORNIA 926N
} H, W, NEWTON tgLepeecma -
umsona m., u..
a.
. May 29,1996.
w ev aoa,===
k 4
Mr. John Robertus California Regional Water Quality Control Board
)
r San Diego Region z
.j 9771 Clairemont Mesa Boulevard, Suite B.
~ San Diego, California. 92124-1331 '
i i
S'UBJECT:
- NPDES Discharge Monitoring' Report San Onofre Nuclear Generating Station, Unit 3 j
]
Dear Mr; Robertus:
i The NPDES Discharge Monitoring Repon (DMR) for San Onofre Unit 3 covering the month of
. April is submitted in accordance with the requirements of Order No. 94-50 (NPDES Permit No; CA0108181). A summary of the generating unit's status and significant analytical results is
. provided below.
The unit was operational all month. ' All sampled water sources were found to be within permit
. limits with the following exception.'. On April 20 at 1810, a release of 22,440 gallons of water i
' with a pH of 12.6 from the High Flow Makeup Demineralizer (HFMUD) Waste Neutralization Tank occurred. The water released from this tank exceeded the pH limit of 12.5 as specified in i,
Title 22 of the California Code ofRegulations. The amount of caustic released was however below the reportable quantity level specified by these regulations. Notifications to all of the required agencies were completed on April 22 at 1530. Although a sample for total suspended solids (TSS) was not analyzed for the release,"it is believed that the 12.6 pH water resulted in a release above the instantaneous limit of 100 mg/l specified in the NPDES Permit due to magnesium and calcium hydroxyls that come out of solution at that pH level. An investigation of the incident occurred and has resulted in greater supervisory controls of the operations at the HFMUD. We believe that these actions along with additional training requirements should 4 prevent'such an occurrence from happening again in the future;
' Pursuant to Order No. 94-50, Reporting Requirement 10, the following representative has
~
prepared and is authorized to sign the reports required by this order: Robert K. Heckler, EnvironmentalEngineer. -
. '~
e j
a 9607090281 960613 1
PDR ADOCK 05000361 1
' S-PDR d
1 _,
~
Mr. John Robertus
. May 29.1996
.Page 2 -
I certify under penalty oflaw that I have personally esamined and am familiar with the information
' submitted in the attached document, and based on' my inquiry of those individuals immediately responsible for obtaining the information, I believe the~ submitted information is true, accurate.
- and complete. I am aware that there are significant penalties for submitting false information,.
including the possibility of fine and imprisonment.
Sincerely, t
\\A A
?
{
' ges Ym
% H. W. Newton Manager Site Support Services Enclosure cc: Environmental Protection Agency, Region IX 1
)
i 1
l
]
1 4
1l i
1
=
i bec:
r.W. C. Marsh /K. Yhip
/
l i
. H. W. Newton /M.- J. Johnson - w/p ' closure
- R. V; D. Reid/D. W. Kay i
N.~J. Mascolo - w/o enclosure G. Gibson - w/o enclosure
~ K. T. Herbinson J. Demlow -.w/o enclosure
' CDM Files IDB - Water / R.K. Heckler F
b
)
I
~
l t
i l
i r
f T
t t
i I
!