ML20211F839

Add 1 to NPDES FL0000159/IT09-154804F for Plant Re Wastewater Generated at Outfall Serial Number 015 (Osn 015) from Mariculture Ctr (Fish Hatchery)

ML20211F839
Person / Time
Site:	Crystal River
Issue date:	09/29/1997
From:	ENTERGY OPERATIONS, INC.
To:
Shared Package
ML20211F833	List: 3F0997-03, Forwards Addendum 1 to Aug 1997 NPDES Monthly Discharge Monitoring Rept,Narrative Rept of Noncompliance ML20211F839
References
NUDOCS 9710010231
Download: ML20211F839 (1)

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Page 2 of 2 ADDENDUM 1 Crystal River Mariculture Center (Fish Hatchery)

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NPDES FL0000159/IT09-154804F

' Part 1,Section I of NPDES Permit Number FL0000159/IT09-154804F for Crystal River Units 1,2 and 3 applies to wastewater generated at Outfall Serial Number 015 (OSN 015) from 1

the Mariculture Center (Fish Hatchery). _Section 1.1, " Effluent Limitations and Monitoring -

1 Requirements," requires that two grab samp!es be collected per month at the point of discharge from the Fish Hatchery system, prior to the site discharge canal. The NPDES permit includes a limit for Biochemical Oxygen Demand (5-day)(BOD ) of 5.0 mg/l measured 3

at the point of discharge.

The wastewater in the tank prior to discharge had a measured BOD value of 4.6 mg/l. Prior-3 to discharge,- stormwater from the drainage ditch had a measured BOD value of 10 mg/l.

3 During the discharge,'a sample was collected from the ditch and had a measured BOD, value of 12.2 mg/l, exceeding the BOD, limit of 5.0 mg/l. However, it is likely that the high BOD value was the result of mixing the 4.6 mg/l BOD wastewater with the high BODS 3

3 stormwater in the ditch, in order to collect point of discharge samples representative of the wastewater from the Fish -

Hatchery, samples would have to be collected at the end.of the' discharge pipe, prior to -

mixing in the drainage ditch. However, the discharge pipe terminates under a roadway in a culvert and is therefore inaccessible for sampling. As a result, samples have historically been collected downstream of the roadway in the drainage ditch, resulting in interference from stormwater in the ditch. FPC has requested approval to relocate the sample collection point as identified in the' permit. A sample port has been installed in the discharge pipe.

FDEP authorized the use of this new sample port on September 15,1997. FPC will begin to collect samples from the new sampling port during the next sampling event.

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