ML20215D746
| ML20215D746 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 10/03/1986 |
| From: | Marshall B VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| To: | Kregloe W VIRGINIA, COMMONWEALTH OF |
| References | |
| NUDOCS 8610140277 | |
| Download: ML20215D746 (2) | |
Text
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m CERTIFIED MAIL RETURN RECEIPT REQUESTED Mr. William L. Kregloe State Water Control Board Valley Regional Office 116 North Main Street P. O. Box 268 Bridgewater, Virginia 22812 Re: North Anna Power Station - Report of Oil Spill and NPDES Excursions
Dear Mr. Kregloe:
This is to confirm our earlier report of an oil spill that occurred on September 29, 1986 at our North Anna Power Station. The incident was reported to Mr. Steve Netrick in your office at 1100 hours0.0127 days <br />0.306 hours <br />0.00182 weeks <br />4.1855e-4 months <br />.
At approximately 1000 hours0.0116 days <br />0.278 hours <br />0.00165 weeks <br />3.805e-4 months <br />, station personnel observed a small oil sheen near the intake structure for condenser cooling water on Lake Anna. The oil appeared to come from overflow of a catch basin underneath the storm drain that carries discharge from the turbine building basement sump. The skimmer pump which normally regulates flow from the sump to the oil water separator was operating at reduced capacity and heavy flow into the sump necessitated operation of the high capacity sump pump. The high flow apparently allowed some oil to be carried over with the discharge.
Absorbent pads were immediately placed in the catch basin to remove oil from the surface and stop the overflow to the lake.
The' basin was later pumped and cleaned. An absorbent boom was set to contain the oil sheen on the lake's surface and then the sheen was removed with absorbent material. The amount of oil actually reaching the lake was estimated to be less than I liter and no adverse environmental impact was observed.
While reviewing the cause of the oil spill and the end of the month Discharge Monitoring Report data, it was discovered that the run timer on the high capacity sump pump did not trip when the pump ran. Since the timer did not indicate any elapsed time, no samples were obtained for Outfall 013 for the month of September.
Therefore, sampling requirements of our NPDES permit for pH, TSS, oil and grease and flow were not fulfilled.
ANN
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'o Mr. William L. Kregloe Page 2 October 3, 1986 As corrective action, the skininer pump will be repaired to full capacity so that use of the high capacity sump pump will be minimized.
If this high capacity pump is manually activated, the catch basin will be checked for oil and timer operation verified.
Sincerely, B. M. Marshall Manager Water Quality GRK/mhs cc: Dr. J. Nelson Grace Mr. Harold R. Denton /
Mr. M. W. Branch
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