ML20127K722
| ML20127K722 | |
| Person / Time | |
|---|---|
| Site: | Pilgrim |
| Issue date: | 12/31/1992 |
| From: | Rothert W, Schmeling L BOSTON EDISON CO. |
| To: | ENVIRONMENTAL PROTECTION AGENCY, MASSACHUSETTS, COMMONWEALTH OF |
| References | |
| BECO5.93.009, NUDOCS 9301260196 | |
| Download: ML20127K722 (9) | |
Text
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
o L*1 BOSTON EDISON pr, um r"eeH:Po
{$'in t P61 f.8:t'. w s ' d> ". b 21 h I January 15, 1993 BEco 5.93. 009 flPDl5 Program Operations Section (WCP)
Environmental Protection Agency P.O. Box 8127 Boston, MA 02114 Massachusetts Division of Water Pollution Control lakeville llospital L.akeville, MA 02346 Qis hgrse Monitorina Renor_t.
t
Dear Sirs:
Enclosed is the Discharge Monitoring Report for Pilgrim fluclear Power Station (Pf1PS), flPDES Permit liumber MA0003557 (Federal) and flumber 359 (State).
The period covered by this report is December 1992.
W.
RDA/ cab /dmr Attachments
- 1. Summary
- 2. Discharge Munitoring Report cc:
U. S. fluclear Regulatory Commission 7 Document Control Desk Washington, DC 20555 U. S. fluclear Regulatory Commission Region 1 475 Allendale Road King of Prussia, PA 19406 Senior f1RC Resident inspector Pilgrim fluclear Power Station 210000 9301260196 921231 DR ADOCK 05000293 h
l PDR i
ATTAtliMElli 1 10 BEco L E11ER 5.93. 009
SUMMARY
ERGi[lM 1 D1KUARGE M0t11]ORit1G RELOM in accordance with the Federal Clean Water Act, as amended (33USC 1251 el Sig:
the " CWA"), and the Massachusetts Clean Water Act, as amended (M.G.L.; Chap.
21, 26-53), regarding effluent limitations, monitoring requirements and other conditions set forth in the Pilgrim f1PDES Permit (federal Permit fiumber MA0003557, and State Permit 14 umber 359), parts 1 and 11, the following information is submitted for the period December 1992.
l.
Discharge Poin13_(oyere L iDl hi _f!Ep_odt l
fli.scharge Point pischaragjdentificalijn
.r 001 Condenser Cooling Water 002 Thermal Backwash for Biofouling Control 003 Intake Screen Wash 004, 005,'006, and 007 Yard Drains (April and September) 010 Service Cooling Water 01)
Makeup Water and Domineralizer Waste Discharge 11.
Summitty and flatej_0_f_Di schargglep3qr_t A.
The flow at points 001 and 010 are calculated from system pump capacity and are equal to the total for all pumps in each system running at full capacity for a 24-hour period.
The flow at 011 is measured by noting sump levels before and af ter discharge.
Flow at point 002 is a conservative figure obtained by calculating flow if backwashing took place for 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
Flow at point 003 is calculated from system pump capacity and mean operating time.
B.
The temperatures at points 001 and 002 are measured by resistance tem;3erature detectors (R10's).
C.
Periodically, total residual chlorine (TRC) concentration in the service cooling water (010) exceeds Permit requirements (0.50 ppm s
daily average IRC and.1.00 ppm daily maximum 1RC) prior to mixing with any other stream, primarily because of the number of service water pumps in operation.
Chlorine injection levels are lowered as a corrective measure.
The dilution provided by the Pf1PS circulating water flow keeps total residual chlorine concentrations discharged to Cape Cod Bay belnw the t4PDES Permit limit of 0.1 ppm.
1 0.
fo' stormater outf alls 004, 005, 006 and 007, Sigma 800 SL Portable Jomposite Samplers are utilized.
The samplers are equipped with a " liquid level activator" that commences tho sampling when the liquid reaches a predetermined level.
This assures a sample is taken "within the first hour of the start of a significant storm event." The intake and collection assemblies of the samplers conform to U.S. EPA requirements for collecting oil and grease samples (USEPA letter to BEco dated 1/7/92).
No additional inputs to these stormwater outfalls occur downstream of the composite samplers' sampling locations.
- ?
E.
Intake trsveling water screens were operated without i
dechlorination pumps operating for 40 minutes on 12/31/92, due to loss of prime.
f.
Sawdust was applied to seek and seal PNPS condenser leaks on December 5(270 pounds), 16(270 pounds), 18(2,280 pounds),20(210 pounds), 25(150 pounds), 26(270 pounds), 27(60 pounds) and 28(90 pounds).
G.
The following baron and sodium nitrite discharges (ppm) occurred in December 1992 from discharge point #001.
All discharges were below NPDES Permit limits prior to entering Cape Cod Bay.
Date Gallons Concentration Concentration Discharaed Dischas ed Before Discharae Discharagd Baron
~
12/8/92 11,616
<l.0
<0.0013 12/23/92 10,020
<l0
<0.0013 i
Sodiua. Nitrite 12/8/92 11,616 7.5 0.0098 12/23/92 10,020
<1.5
<0.002 11.
By letter dated December 30, 1992 the U.S. EPA, Region I, rescinded the PNPS NPDES Permit, discharge canal barrier net requirement until April 1, 1993 (BEco Letter 5.92.180).
This was due to irreparable damage to the net from the 12/ll/92 northeast. storm and low probability of environmental consequences.
I.
The PNPS Environmental Program and Plans for 1993, to meet NPDES Permit requirements, were approved by the U.S. EPA on December 30, 1992 (BECo Letter 5.92.181).
J.
As previously endorsed, the PNPS Plant Manager (presently L. L.
Schmeling) is designated as the authorized agent to sign PNPS Discharge Monitoring Report (DMR) Forms for Boston Edison Company, i..
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