ML20091L153: Difference between revisions

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l B ALTIMORE G AS AND ELECTRIC COMPANY PO.DOA 147S DALTIMOkt-- M A R YL A N o 212 o 3 NVCLE CALVEmfAR          Pont CLitfl    h D.EP 4WCL E A mART Poet =    (NTAm t a PL W $$Y. WAmVLAND $C657 February 9, 1983 Office of Environmental Programs Waste Management Administration 201 West Preston Street Baltimore, Maryland 21201 Attention: Mr. Ronald Parise                                              Re: Maryland State Discharge Permit No. 74-DP 0187 and NPDES Permit No. MD 0902399
 
==Dear Mr. Parise:==
 
Two incidents of noncompliance are reported below.
On T Mtary 1,1983, the coliform results from the sample talen on Wednesday, January 26, 1983 were found te be 109 mpn/100 ml. This is above the NPDES limit of 70 mpn/100 m1 for monitoring point 101.                                        Prior to sampling, main-tenance work had been done en the raw sewage pumps. When returned to service, they were inadvertently left in manual mode rather than automatic and did not trip off at the specified tank level. This continuous pumping caused an hydraulic overload on plant No. 2, carrying solids over into the contact chamber. Contact time and chlorine cor.cet.tration was insufficient to effectively reduce the coliform population. Immediate corrective action included correcting pump mode, transferring flow to No.1 plant, increasing i pochlorite flow and adding polymer to settle solids. The back up sampia grabbed on Tuesday, February 1, ISb3, indicated a colifum count of 25mpn/100 ml.
                                              "aintenance personnel have been admonished to notify plant operator of any changes of equipment parameters they initiate.
Non-compliance of the suspended solids limitation was also detected on February 1,1983 with a value of 46.6 mg/1. High suspended solids persisted for the next three days- and are believed to have exceeded the allowabic 45 mg/l daily maximum for monitoring point 101_although no analysis was perfomed. A waterhose had been Icft on causing an hydraulic overload and carried solids into the effluent line. The hose was secured on February 1, 1983 and polymer was used to settle the aeration tank. Subsequent sampling revealed suspended solids of 20 mg/l on February 5, 3.3 mg/l on February 6, and 23.3 mg/l on February 7. The responsible operator has undergone supervised Tetraining and it has been restressed that follow up analyses are to be per-formed every day until the parameter has returned to acceptable levels.
9201270287 920116 PDR        ADOCK 05000317
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fir. Ronald Parise                  +1-                                                                    i February 9,1983                                                                                            !
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Should you have questions regarding this information, please feel free                                      l to call,                                                                                                    j Very truly yours,                                                                                          i i
(,4,44f L. B. Russell                                                                                              l Plant Superintendent                                                                                        ,
LBR/ DIE /feb l
4 F
r y
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k I
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                                                                                                                          'i a-I T
                                  - . - .        .,    ,  -----. . - - . . , . . - , , , , , ,  - , --i~.. ,      , f-}}

Latest revision as of 00:43, 13 May 2020

NPDES Noncompliance Notification:On 830126,results Indicated Coliform Concentrations to Be 109 MPN/100 Ml,Exceeding Limit of 70 MPN/100 Ml.On 830201,suspended Solids Limitations Had Value of 46.6 Mg/L.Raw Sewage Pumps Were Left on Manual
ML20091L153
Person / Time
Site: Calvert Cliffs  Constellation icon.png
Issue date: 02/09/1983
From: Russell L
BALTIMORE GAS & ELECTRIC CO.
To: Parise R
MARYLAND, STATE OF
Shared Package
ML20091K978 List:
References
NUDOCS 9201270287
Download: ML20091L153 (2)
v • d • e


Text

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l B ALTIMORE G AS AND ELECTRIC COMPANY PO.DOA 147S DALTIMOkt-- M A R YL A N o 212 o 3 NVCLE CALVEmfAR Pont CLitfl h D.EP 4WCL E A mART Poet = (NTAm t a PL W $$Y. WAmVLAND $C657 February 9, 1983 Office of Environmental Programs Waste Management Administration 201 West Preston Street Baltimore, Maryland 21201 Attention: Mr. Ronald Parise Re: Maryland State Discharge Permit No. 74-DP 0187 and NPDES Permit No. MD 0902399

Dear Mr. Parise:

Two incidents of noncompliance are reported below.

On T Mtary 1,1983, the coliform results from the sample talen on Wednesday, January 26, 1983 were found te be 109 mpn/100 ml. This is above the NPDES limit of 70 mpn/100 m1 for monitoring point 101. Prior to sampling, main-tenance work had been done en the raw sewage pumps. When returned to service, they were inadvertently left in manual mode rather than automatic and did not trip off at the specified tank level. This continuous pumping caused an hydraulic overload on plant No. 2, carrying solids over into the contact chamber. Contact time and chlorine cor.cet.tration was insufficient to effectively reduce the coliform population. Immediate corrective action included correcting pump mode, transferring flow to No.1 plant, increasing i pochlorite flow and adding polymer to settle solids. The back up sampia grabbed on Tuesday, February 1, ISb3, indicated a colifum count of 25mpn/100 ml.

"aintenance personnel have been admonished to notify plant operator of any changes of equipment parameters they initiate.

Non-compliance of the suspended solids limitation was also detected on February 1,1983 with a value of 46.6 mg/1. High suspended solids persisted for the next three days- and are believed to have exceeded the allowabic 45 mg/l daily maximum for monitoring point 101_although no analysis was perfomed. A waterhose had been Icft on causing an hydraulic overload and carried solids into the effluent line. The hose was secured on February 1, 1983 and polymer was used to settle the aeration tank. Subsequent sampling revealed suspended solids of 20 mg/l on February 5, 3.3 mg/l on February 6, and 23.3 mg/l on February 7. The responsible operator has undergone supervised Tetraining and it has been restressed that follow up analyses are to be per-formed every day until the parameter has returned to acceptable levels.

9201270287 920116 PDR ADOCK 05000317

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9 i .. ;

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fir. Ronald Parise +1- i February 9,1983  !

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Should you have questions regarding this information, please feel free l to call, j Very truly yours, i i

(,4,44f L. B. Russell l Plant Superintendent ,

LBR/ DIE /feb l

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'i a-I T

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