ML20092G821

Provides Toxicity Test Results for Outfall 002

ML20092G821
Person / Time
Site:	Catawba
Issue date:	09/12/1995
From:	Carter J DUKE POWER CO.
To:	Beaty V SOUTH CAROLINA, STATE OF
References
NUDOCS 9509200102
Download: ML20092G821 (6)

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.j.. $ t "I gg;s l'W.," w- . . ,4 ,. y , yV t : outwPowen Septemt er 12,1995 Mr. Vernon Beaty, Aquatic Toxicologist Industrial and Agricultural Wastewater Division

. South Carolina Department of Health and Environmental Control 2600 Bull Street Columbia, SC 29201

Subject:

Catawba Nuclear Station - NPDES Permit # SC0004278 Toxicity Test Results for Outfall 002 File: CN-702.13

Dear Mr. Beaty:

This leteer is in response to your letter dated August 15, 1995 concerning the toxicity test failure which occurred for outfall 002 on June 7,1995. The permit condition Part III. A.13.

c. (Copy Attached) which required that a Toxicity Reduction Evaluation (TRE) be performed following a toxicity failure was dropped from the NPDES permit when Pha<e II went into effect on May 1,1994. This issue was also-discussed with Mr. Tim Eleazer who indicated that we do not need to perform the TRE analysis.

Additionally, please find attached a follow up toxicity test which was collected on June 22, i 1995 for outfall 002 following the June 7,1995 test. This follow up test passed the toxicity I

test. Please accept this passing follow up test in lieu of the Toxicity Reduction Evaluation.

Should you have any questions concerning this letter please give John Estridge a call at (704) 875 5965.

4 Sincerely, s I

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,/jfo n S. Carter, Technical System Manager

(/ Environmerital Division, Water Protection 4

l jte/473 9509200102 950912 i PDR ADOCK 05000413

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' A.P. Jackson - CNO3Cl 1 J.T. I larris - CNol EM J.S. Velte - MG03 A3 Attachments include:

Page 9 of 31 of NPDES Permit June 22,1995 Passing Toxicity Test A

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A. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS

1. During the period beginning on (See Part III, Special Condition #14)of this Permit and lasting through the expiration date the Permittee is authorized to discharge from outfall(s) serial number (s) 002: low volume wastes, miscellaneous dilute wastewater, and metal cleaning wastes to Lake Wylie.

Such discharge shall be limited and monitored by the permittee as specified below:

EFFLUENT CHARACTERISTICS DISCHARGE LIMITATIONS MONITORING REQUIREMENTS kg/ day (lbs/ day) Other Units (Specify)

Monthly Daily Monthly Daily Measurement Sample Average Maximum Average Maximum Freauency Ivoe Biological Monitoring - - -

0(" 1/ouarter Grab (Whole Effluent Chronic Toxicity Testing)

(1) See Part III, Special Condition #13 a,b,d,e

2. Due to the intermittent and variable duration of the batch discharges for Outfall 002, the sampiing protoccl for chronic testing is modif,ed to allow Duke Power Company to conduct the chronic testing with only cne or two samples in instances when flow is not available.

3. Samples taken in compliance with the monitoring requirements specified above shall be taken at the fellcwing location (s): at the point of discharge from the conventional waste treat, gent (WC) system but prior to mixidg yy; with the receiving waters. f gj5

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