Text

Forwards Amend Version of Appl to Discharge Waste Water Submitted to EPA on 770228.Amends Deal W/Change from Buried Pipes to Hard Rock Tunnels,Change in Dewatering Methods & Combining Backflush Oper
	ML20197D085
Person / Time
Site:	New England Power
Issue date:	11/08/1978
From:	Harrington J; NEW ENGLAND POWER CO.
To:	Tanya Smith; ENVIRONMENTAL PROTECTION AGENCY
References
	NM-N-1067, NUDOCS 7811210364
	Download: ML20197D085 (68)
	v • d • e

NEP 18 2 NUC'. EAR PROJECT 4

@ TI Q* D? HEW ENGLAND POWER COMPANY M*"* 617 366 w I

?nc" 20 Turnpike Road, Westborough, Massachusetts 0158l November 8, 1978 50 - N NM-N-1067 Ms. Janet Smith, Attorney Enforcement Division Region I, U.S. EPA J. F. Kennedy Federal Building.

Boston, MA 02203

Dear Ms. Smith:

Re:. Amendment to previously submitted Application to Discharge Waste Water (RI 0020982)

On February 28, 1977, New England Power Company submitted to EPA an application.for a permit to discharge under the National Pollu-tant Discharge Elimination System (NPDES).

Since then, changes have occurred which make appropriate an amendment to the pending application.

For the convenience of those reviewing the application, rather than just submitting specific changes we have instead prepared an amended version of the application; it is enclosed.

The amendments to the application deal with (a) the change from buried pipes to hard rock tunnels for both the cooling water intake and discharge conduits, (b) changes in dewatering methods, which now utilize a slurry wall concept, significantly reducing the ground water' inflow into the excavation and (c) combining backflush operaticas of the inde-pendent units as a result of the change to hard rock tunne.ls.

Changes included in the amended application are noted in the margin at each change, or by a revision note on applicable drawings.

We are available at your convenience to discuss any portion of this application and the amendments thereto or of the cooling water system design and the environmental impact assessment.

Very truly yours, M

Joseph Harrington Project Manager

'JH:rh cc: w/2 encls.

7811210 g \\rj Carleton Maine, Div of Water Resources, DEM, RI 3 4 (j R. M. Rush, Task Group Leader, ORNL I

.T.

E. Landry, Permits Branch, Region I, EPA 7 [

cc: w/7 enc 1s.

b Harold R. Denton, Dir. NRC cc-Iohn Ivnch, EIS. F.P A 7

m e

P FORAI APPROVI:n '

OAlli No. !$$-R0100 FOR AGENCY USE NATIONAL POLLUTANT DISCHARGE EllMINATION SYSTEM APPLICAIlON FOH PERMil TO DISCilAHGE WAST EWATER STANDARD FORM C - MANUFACTURING AND COMMERCI AL SECTION 1. APPLICANT AND FACILITY DESCRIPTION

. Unseti

'hcr*lle $tsL4tficd on (tut form.sil elems are to be Completed. If ah item Il not apphCable indicate 'N A,*

ADDIT TONAL INSTnUCTIONS FOn 50LEC1EO ITEMS APPk An IN SEPAR ATE INSTRUCTION BOOKLET A$ INDICATED, REFER TO BOOKLET Ur FOnE F ILLING ouT THF 50 4TEMS.

Please Print or Type New England Power Company (See' Item 12 below) 1.

Legal Name of Applicant 101 (sec insteu6tions) 2.

Massing Address of Aapiscant (see inst #wClions) 20 Turnpike Road Number s. Street tota Westborough city tore Massachusetts siaio io,,

01581 tin cne iotd 3.

AppilCant'n Aulnonaed Agent (tce inntruCleons)

Joseph Harrington Name and Titie tosa Project Manager 20 Turnpike Road Numoer 4, Street A03rell 103b

cii, iost Westborough Massachusetts 3,,,,

01581 rio code tose 617 366-9011 Teiepnene

tos, Area Numoer.

4, Previous Application Code if a previoso aDOhCatoon f or a Netsottai or I ederal doCnarr,e pere mn nai e en mace, g.a ine dan, or aooi. canon. vie numeric

, No,t Applicable designation f or oste.

104 YR MO DAY 8 Certify that I am famDiar witn the informatiorn Contained in thil 40DilCation and that to the belt of my knowledge and t>elief SuCh informallon 45 true Comtoete, and eCCuf ate.

Joseph Harrington Project Manager Printed Name of Person Signeng Title 78 11 7 YR MO DAY

' Signature of AcphCant or[utnorised Age)

Date AppHCation $sgned 18 U.S.C Section IU0I proudes that:

Whoever, un any inatter nahun the turndictson of any departntent or atency of the United States knowngly and wilfully falsifies, conceals or covert up by ony inck, scheme, or J rsce a matertalfact, or onakes an y false, fictstious or fraudulent staternent or representation, or anakes or uses any false wrrting v' Jwument k nonsnt same to contasn any false / < Intsous or fraudulent statement or entry, shall be JincJ not enore than k

310,000 or empersoned not enore than fire v.ars, ur both.

FOR ActrEY USE OFFICE:

EPA Region Numtier Mn n *\\ v

_ sygge

.. _ ~ _ _, _ _., _ _.... -. _

i F.Clillp/dt tivity (see lattructims)

FOQ QGEP4CY USE (11.. It f naine. Ow n** bND. and payuC ai tar.stices of Inv piant ce Olnef opef,teng f,(60tt y het( d$

R I O O 2 ) 9 2

C n.,,eti) doei o.. oi oCCu,.

NEP 162 Name

sos, 0.nersnW (Poo'iC. Pvate or Doth Put9st and Privatel lose O pvu O priv C opp check bloc k if Federal F aci'ity tese O FEo and eire GsA Inventary Cont.oa j

N u m be r tosd Loca tion

Former United States Naval Auxilarv Landine Field street & Number

iol, Charlestown criy

los, Washington County county io$s Rhode Island 3,,,,

,,3, Generation and sale of electric power s.

u.iure ce ous nesi staie ir.

ios, nature of tne Dulepell C ondJCted at tne oi.ni or operwn, taCneiy.

Currently owned by U.S. Government, Disposition of property is under supervision of GSA Administrator.

ioso acEsevUsr Disposition is currently awaiting outcome of GSA Environmental Impact Review. Applicant is attempting to purchase the property.

7.

F aClisty intake Water (lee Inst ruC.

tionn) indicate ater letek 0 volume pe, day oy sources. Estimate Normal Operation Construction Only ever,qe volume eer 0,y in thousand

$4flont Def day.

0 O

8dundCIDel of OfNate ater system Io7s inou u n,,, non,,,,,,,

1,232,640 inou,,nd onon..., d.y 1,232,640 sure C...ier io,,

288 288 cround. ie, sore

,,,,,nd

,,non,pe,d,y 19,500 25,260 o t n., '

to7d in o,,,n,,,,,on..., da y 1,252.428 tnous,nd y,ioni,,, d.,

1,258,188 Toi,, nem io7.

Normal - storm water runoff

.ir in... i. ine.i.e. t.r e ro*

Construction - storm water runoff and construction dewatering o rne,, i etiry in. iou,C..

iore S.

F8Cllity Water Use l' lt emate ever,9e volum. Der day in Inouland NilI*'. Ir'u'[.',7,*i ins i$"i!iy.

Normal Operation Construction Only (bee inntfuCtf ons) 1.232,640 1,232,640 NonContsCt Cooling

mar tota

,no,,,,,,,,,,,,,,

DoHer feed ater loso '

O O

,,,,,,,,,,,on,,,,d,,

Proc.11.ater (inCludin, Cont &Cl 7

.)*g C oOlln9.a te r) iole tnovund 9allons per day 16 60 s.nn,ry..it, sosd inouund,anoni 9., day j

19,500 25,260 ein.,

ios.

1,252,428 1,258,188 toi.i n.m a ioee no,,,,,,,,,

Normal - storm water runoff Sin.,$o'.' if,$'""' '

Construction - runof f and excavation dewaterine

ice, i t in... is s net,,y

..ie, uw,....

200 3,000 (maximum) the nu-t>e. or o.no.. se rved.

ioen

,m oi. w,,ed 11-ee-cum e-see w

FORM APPROVED OMB No.158-R0100 s

POR AGENCY USE 9.

All Facility Olscharges and other tosses, Nummer and Onenange (see R I C 0 2 0 9 8 2 instructions) Volume specify tne number of dischs?ge po6nts and the volume of Water discharged of 3

iosi erom ine f aciiity acco,deng to TOTAL VOLUME USED OR DISCllARGE-10 gal / day in. cate,ories beiem. Estimate so m,,,,,

average voiume per dav in ta*usaad Normal 0,,cna,ge Construction Discharge #

ganons per day.

Operation po,ni, 1.232.897.6 1,232,640 001 surf ace water 109 1 1

10*as Sanstery wastewater transport 19961 19962 lg system 002 1

19,500 25,260 storm water transport system 100e1 10ee2 Combined sanitary and storm water transpof t system 19948 19942 effluent 100e1 199e2 203 004 surf acs impoundment witn na 1

3.4 60 003 underground percolation 109f t 199f 2 West iniection 19991 19992 Waste accootance firm 109nt 199h2 Evaporation 19961 19912 25 Consumption 19911 19912 s

2 1 131 dlL i l

_.I P

- otner-Backflush iO9m1 10e=2 i

racmty disenarges and ' '"**

1'752.428 1,258,188 l

Total item 9.

10961 19912 l in.re are diienarges to oiner.'

Item C2 construction includes excavation dewatering

*Not included in total, alternate form of #001 I c. Permits. Licenses and Applications (Jst an existing, pending or denied permits.16 censes and applications related to discharges from inis f acility (see instructions).

D' '

cate Date Date Em piration issuing Agency For Agency Use 10 Number Filed issued Densed Date U'

Y R/MO/O A Y R/MO/D A V R/MO/O A Y R/MO/DA 110 (a)

(b)

(c)

(d)

(e)

(f)

(g)

(n)

STN

i. USNRC Const ructic n 50-568 76/8/2 Permit 50-569 l l

l 2.

I I

3-11 Maps and Orawings Attaen all recuered macs and drawings to the Dack of tnis application.(see instructiorts)

See Attachment #1 - Location Map; Attachment #1 - Schematic Water Flow

12. Adottional inf ormation 112 Item Number informatinn 5

Owner - New England Power Comnany is anolving fnr i t sel f nnri ne agent for eight other New England utilities nnrticinntino 1.r i t h it as tenants-in-com:non in NEP 152.

Participation has also been offered to certain other New England utilities.

NEP is fully authorized to act for all owners.

E P A Form 7550-23 (7.73)

I-3 oro nos tos

4 NEP 1 6 2 BASIS FOR NPDES ESTIMATES

- Section I, Item 12 Additional Information Item 7 - Facility Intake Water: Normal Operation 107b. Surface Water:

Circulating and service seawater (856,000 x 1440) 1,232,640,000 gpd 107c. Ground Water: Demineralizer makeup, system cleaning, potable and sanitary system (200 people) 288,000 gpd 107d. Other: Allowance for storm water runoff, based on probable maximum precipitation Site area - 34 acres, infiltration 0.5 in/hr first hour; 0.1 thereaf'ter.

Site area of 34 acres represents the area located within the toe of the protective revetment.

TIME MAXIMUM RAINFALL EXCESS 1

9.8 9.3 2

13.0 12.4 3

15.2 14.5 4

16.8 16.0 5

18.7 17.8 6

20.0 19.0 12 22.1 20.5 24 23.9 21.1 TOTAL 1.758 ft/ day 34 acres x 43560 SF/ acre x 1.758 f t/ day = 2.604 x 10 CFD 6

2.604 x 10 CFD x 7.48 gal /CF = 1.948 x 10 gpd, approx. 19,500,000 gpd 107e. Total Item 7 1,252,428,000 gpd Item 7 - Facility Intake Water:

Co.

'on Only 107b.

Surface Water: Circulating and service seawater = 1,232,640,000 gpd A

107c. Ground Water: Demineralizer makeup, system cleaning, potable and sanitary system, and concrete batch plant - 200 gpm x 1440 min / day = 288,000 gpd.

107d. Other: Allowance for storm water runof f & excavation dewatering 25,260,000 gpd 1,258,188,000 gpd 107e. Total Item 7:

Item 8 - Facility Water Use: Normal Operation 108a. Non Contact Cooling Water: Circulating and service seawater flow -

1,232,640,000 gpd 108c.

Process Cooling: Demineralizer regenerant, system cleaning, secondary plant lea ka ge, steam generator blowdown, auxiliary boiler wastes - 272,000 gpd 108d.

Sanitary Water: Treated sanitary effluent (200 people) to leach field -

16,000 gpd 108e. Other:

Allowance for storm water runoff (PMP) - 19,500,000 gpd 108f. Total Item 8:

1,252,428,000 gpd I4 1

l J

A u

4 Item 8 - Facility Water Use: Construction Only 108a. Non Contact Cooling Water: Circulating and service seawater -

1,232,640,000 gpd 108c. Process Water: Demineralizer regenerant, batch plant, secondary plant leakage, & system cleaning (augmented from storage)' radioactive waste effluent, auxiliary boiler wastes - 228,000 gpm 108d.

Sanitary Water: Treated sanitary effluent (3,000 people) to leach field 60,000 gpd 108e. Other: Allowance for storm water runoff and excavation dewatering -

25,260,000 spd 108f. Total Item B: 1,258,188,000 gpd.

Item 9 - Facility Discharges: Normal Operation 109a. Surface Water:

1&2 - 1 Discharge point Circulating and service seawater 1,232,640,000 Demineralizer regenerant, steam generator blowdown, secondary plant leakage, &-

257,600 system cleaning 1,232,89 7,600 gpd 109c.

Storm Water Transport System:

162 - 1. Discharge point Allowance for storm water runoff - PMP 19,500,000 gpd from plant area 109e.

Surface Impoundment With No Effluent:

162

1. Discharge point zero 109f. Underground Percolation: 1&2 - 1. Discharge point Sanitary water - leach field 200

. pe rmanent employees, auxiliary boiler wastes 30,400 gpd' 1,252,428,000 gpd 1091. Total Item 9:

1&2 item 9 - Facility Discharges: Construction Only 109a.

Surface Water: 1&2 - 1.

Discharge point Circulating and service seawater 1,232,640,000 gpd 109c.

Storm Water Transport System:

162 - 1. Discharge point a

Storm water runoff and excavation dewatering and spoil pile overflow to settlement basin 25,260,000 gpd 109e. Surface Impoundment With No Effluent:

1&2 - 1.

D.p.

System chemical cleaning to lagoons 203,000 gpd 109f. Under Ground Percolation:

1&2 - 1.

Discharge point Sanitary waters to leach field 60,000 gpd 109j. Consumption: 1&2 Hakeup to batch plant 25,000 gpd 1,258,188,000 gpd l1 1091. Tot 1 Item 9:

2 I-5 j

i i

w Item 9-During the construction phase,'the settling basin will discharge to Nin1gret Pond drainage associated with storm water runoff from yard and roof storm drainage, as well as excavation dewatering flows and any spoil pile overflow.

1 Excavation dewatering flows-have been estimated as 4,000 gpm (uaximum).

g During normal operation the settling basin will only discharge storm water.

runoff to Ninigret. Pond.

Details of the settling basin have as yet not been developed, however, the settling basin will be designed to accommodate the one in ten year flow from the construction related catchment, and the one in one hundred year flow from the normal operation related catchment.

I-6

_,.....~..-... - - -,. _... _,,... _. - _...,... _ - _ _, _ _.... _ _ _ _..... _ _ _..

1 NetIa4 Revision 1 10/ 7 8 U( ?

l> ' .,i '\\ (r-g :l ! ' - '" , 4'+.h l%. - t n p. 4 ~ u r , ) 'o /,k '/ v.. ..D ' v ) w("- g e, . ' I' .;^'f. 4 ) p i .A g' p, ,a r , Q..G .g. J . u,- %4 pll,ll f: hp, 'L'.) - { 'g%V q \\ s%,) I,l' / L'\\ Q.h.6,%f ).

f. Nf

~ t, ty. Charh. tawd 4', .t NEP 1 B, . 4 ', 0 c 0 9,4 >..,n.. A 8, nc.h ,,; / ,.904. ( u.. i s.. ,2#.' I NT A K E & DISC H ARGE ". t 'nm f,';.\\ (,j', d' T R A N S LT,1 0 N f URES d{ \\,,Y %D;;, o ', '8 2 'N % if y},,,. t, rcm. m.h > t$ L;, j r.. a q ,i fi, (.f>)~ a Jcp \\, D..n . (q ,f.d. // '<s.\\,...q ;, * * ' I?.2

j' 2 [Q 6} TUNNELS'

'.$,y n n n,... g '\\,,..... C / .y t., e-i c,.. \\

s. ;.

o. -.,.,/

j p

q

. - + w.. f i i g b s' ~ 'y -e c:*^ -,. ~.) / / ./ b ~- ~ INTAKE STRUCTURES UNITS I a 2 W,, '../ VERTIC AL SHAFTS i 0 05 ) 2-14' W MULTIPORT e' DISCHARGE DIFFUSER t PIPES UNITS I a 2 ') 00l. ( s i

si, in von

,.g,J" ,,W " s y crwroim mosca r, S orrro w ruw $( LOCATIONS OF DISCHARGE POINTS NEW ENGLAND POWER COMPANY NPDES PERMIT NEP1&2 g NEP1&2

BLOCK ISLAND PL ANT WELL STORM FIRE SOUNO FIELD WATER POND I I l 1 INTAKE -8 19 20 STRUCTURE G1G.32 0.288 19.5 DE M IN. l FIRE SYSTEM MAE 10 POT. ( 9 S ANI T. l 0.203 0.060 SYS-l 26 7 INTAKE 3 12 ~,

PUMP-*

CHEMICAL 584.64 H0USE 31.68 0.203 CLEANING 0.025 CONC. hfN 25 E XCAVAT ION SERVICE 4 C I RC.WAT E R WAT ER 5.76 DE WAT ERI NG 4 5 SYSTEM-SYSTEM LEAK TEST 584.64 31.68 LEAK TEM J 2 7 l SPOIL PILE OVERFLOW - UUKIOr/14 IF ANY i l j l DISCHARGE g 6 TRANSIT ION @2 2 NO.gPOI N T C c 616.32 STRUCTURE 17 HOLOlNG o' NUMBER m m Z 0.203 LAGOON 9 (n I T XXXX,. FLOW IN I $3z m c m c - rn z Z M.G.O. AT THIS O $ 00 TP POI N T gyE ~ Z y aT o 7 DISCHARGE LE ACHING 18 21 SETTLING c3 '1 g o 61632 STRUCTURE FIELD 0.060 2526 BASIN z m m y cz m m m m c 003 002 3,, 001 g f' t. 2 '1 a 8 e

i NEW ENGLAND ELECTRIC COMPANY NEP 1 & 2 " Schematic of Water Flow" One Unit Under Construction Point Description Flow

Notes Purpose' 1

Intake Structure 616.32 MGD Intermittent During Construction Testing 2 Intake Pumphouse-Cir. Water Side 584.64 MGD Intermittent During Construction ' Testing 3 Intake Pumphouse-Service Water Side 31.68 MGD . Intermittent During Construction Testing i 4 Circulating Water System Leak Testing (etc.)584.64 MGD Intermittent.During Construction Testing 5 Service Water System Leak Testing (etc.) 31.68 MGD Intermittent'During Construction Testing l 6 Discharge Transition Structure 616.32 MGD Intermittent During Construction Testing 7 Discharge Structure 616.32 MGD Intermittent During Construction Testing 8 Well Field Pumping System 0.288 MGD. Maximum Flow Rate-Probably Intermittent 9 Demineralizer Make-up System 0.203 MGD Intermittent 10 Potable and Sanitary System 0.060 MGD Intermittent 12 System Chemical Cleaning 0.203 MGD Intermittent 4 17 System Cleaning Lagoona 0.203 MGD Intermittent 18 Leaching Field 0.060 MGD Intermittent 19 Storm Water F mof f Allowance 19.50 MGD Maximum Intermittent i 1 20 Fire Pond Pump 2:n System As Required Intermittent 21 Settling Basin 25.26 MGD Intermittent 25 Excavation Dewatering Allowance

5. 76 MGD Maximum - Intermittent 26 Concrete Batch Plant 0.025 MGD Intermittent, Consumptive Use 47 Spoil Pile Overflow if any Unknown Intermittent if any i.

i

- Flow rates are based on normal design values. Head loss changes and biofouling could caune nominal flows to vary +10%

Page 2.of 9 4 d 4 = n c .-~ ~

i EmOCK ISLAND PLANT WELL STORM FIRE SOUND FIELD WATER POND l l .l 1 INTAKE 8 19 20 l 1.232.64 STRUC TURE 0.288 19.5 AS REQUIRED .085 DEMlIt l FIRE SYSTEM i 9 MAKE 10 POT.( UP l 0.203 0.060 S A N IT. U 4 SYS. l2 I INTAKE 3 12 l 26 LPU MP -+ CHEM. R025 1.169.28 HOUSE 63.36 0.155 CLEAN. y AUX. 13 CONC. 25 E XCAVATION BOILER + BATCH 136 D E WAT ERI NG = .0072 WASTES PLANT SERVICE CIRC. WAT E R 4 5 WATER 1,169.2E} 63.36 [Q _ DEMIN. i HEAT LOAD 14 17 PLANT 43 EM 4 0.155 TRTMT. KEY i 15 STEAM GEN. POIN T f .0288 stw o. N O.' NUMBER l R vi 6 DISCHARGE ig RAD. XX XX'-FLOW IN m T ^ E M.G D THIS f EMM 1)32.6fS T E i .0005 EF i 1 1 5 k c ~C D m SEC. zZ 11 PLANT 1 z z z n o mo .0072 LEAKAGE j A"O]5 .1958 4.0408 l n z f OSTz l7 LE ACHING 18 21 SETTLING DISCHARGE D& - 1232.83,5kTRUC TU R E FIELD .0672 2Q86 BASIN m T w u u O Cm m I 003 002 yy 001 %o o z .2--

NEW ENGLAND POWER COMPANY NEP 1L 2 " Schematic of Water Flow" One Unit Complete, One Unit Under Construction Point Descrip tion Flow

Notes Purpose 1

, Intake Structures 1,232.64 MGD Combined { Intermittent for One Unit Testing Flow Continuous for One Unit Norm. Operation 2 Intake Pumphoune Cire. Water Side 1,169. 28 HGD Combined { Intermittent for One Unit Testing Flow Continuous for One Unit Norm. Operation 3 Intake Pumphousa Service Water Side

63. 36 MGD Combined {One Unit Intemittent Testing Flow One Unit -Operating Norm. Operation 4

Circ. Water Head Load 1,169. 28 MGD Combined One Unit Intermittent Testing Flow One Unit Operating Norm. Operation 5 Service Water llead Load

63. 36 MGD Combined (One Unit Intemittent Testing Flow One Unit Operating Norm. Operation 6

Discharge Transition Structure 1,232.64 MGD Combined {One Unit Intermittent Testing Flow One Unit Operating Norm. Operation 7 Discharge Structure 1,232.C358 MGD Combined Flow,Two Unit Discharge 0.288 MGD Maximum Intermittent 8 Plant Well Pump System 9 Demineralizer Make-up System 0.203 MGD Intermittent 10 Potable and Sanitary System 0.060 MCD Intermittent 11 Secondary Plant Leakage 0.0072 MGD Assumed Continuous from Operating Plant 0.155 MGD Intermittent for either Unit 12 System Chemical Cleaning 13 Auxiliary Boiler Wastes 0.0072 MGD Intermittent for Operating Unit 14 Demineralizer Regenerant 0.0043 MGD Continuous for Operating Unit 15 Steam Generator Blowdown 0.0288 MGD Continuous for Operating Unit 16 Radioactive Waste Effluent 0.0005 MGD Continuous for Operating Unit 17 Internal Plant Treatment 0.155 MGD Intermittent 0.0672 MGD Intermittent 18 Leaching Field 19 Storm Water Run-off Allowance , 19.50 MGD Intemittent 20 Fire Pond Pumping System s Required Intermittent i 20.86 MGD Intermittent 21 Settling Basin 25 Excavation De-watering 1.36 MGD Maximua Flow - Intermittent 0.025 MGD Intermittent - Consumptive Use 26 Concrete Batch Plant

- Flow raten are based on nominal design values. Ilead loss changes and biofouling could cause nominal flows to vary +100

-Attachment 2 Page 4 of 9

PLANT WELL BLOCK ISL AND ST ORM FIRE FIELO souNo WAT E R PCND l i I I 8 l 33 lOISCHARGE 19 l 20 l g;jg II.30.76 STRUCTURE n5 AS REQUJRED h h POT. ( % NIT. h FIRE SYSTEM 3 OEMIN. to OEMIN 72 4 (L13G "hE 1 .016 p 0.136 12 SYS. 31 f34 NTAKEj 35 l CHEM. H0YE L3 3 0D88 CLEAN-AU X. AUX. C 0.088 1067.41 13 BOILER BOILER 23 _.0072 WASTES WASTES.0072_ ~ CIRC SERVICE iO(.7]4 &^d i N T. IN T. [ts WATER 37 WATER 17 32 M.1^J isra 4-111%o.ase aDee21n ^ i oEMiN. REw N. 3 R OlNT* Y NUMBER -'gygg-STEAM GEN. -0288-- LOW IN - 15 28 BLWD4 MGD AT THeS d. pot h Y jr 16 R A D. 29 [ 38 lfNTAKE T IT -gg-WAST.E EFF. g-gg397c l ~ 11 SEC. PLANT 30 LEARAGE .0072 .0072 O.068

00408, co4Os

_O tu sc 0 257t - _ 4 18 LEAC641NG l 39 j INTAKE 21 SETTUNG .030.1 FIELD Il3. i.Ot75 STRUCTURE 13.5 BASIN l005 l002 003 I %2l Rouns f., %:n NEW ENGLAND POWER CO. NEP 1 AND 2 . SCHEMATIC OF WATER FLOW ~ a BACKFLUS,H OPERATION i AT TACHME NT 2 PAGE 5 OF 9 1

NEW ENGLAND POWER COMPANY NEP 1 6 2 " Schematic of Water Flow" Backflush Operation Point Description Flow

Notes l'-

8 Plant Well Field Pump System 0.288 MGD ivo Unit Maximum Flow-Intermittent 9 Demineralizer Make-up O.136 MGD One Unit - Intermittent 10 Potable and Sanitary 0.016 MGD Two Unit - Intermittent i 11 Secondary Plant Leakage 0.0072 MGD One 'Init - Continuous 12 System Chemical Cleaning 0.088 MGD One Unit - Intermittent 13 Auxiliary Boiler Wastes 0.0072 MGD One Unit - Intermittent 4 14 Demineralizer Degenerant 0.0043 MGD One Unit - Continuous 15 Steam Generator Blowdown 0.0288 MGD One Unit - Continuous 16 Radioactive Waste Effluent 0.0005 MGD One Unit - Intermittent 17 Internal Plant Treatment 0.088 MGD One Unit - Intermittent 18 Leaching Field 0.0304 MGD Two Unit - Intermittent a 19 Storm Water Run-off Allowance 19.5 MGD Two Unit - Intermittent 20 Fire Pond Pumping System As Required Two Unit - Intermittent i 21 Settling Basin 19.5 MGD Two Unit - Intermittent 22 Demineralizer Make-up O.136 MGD One Unit - Intermittent 23 Auriliary Boiler Wastes 0.0072 MGD One Unit - Intermittent 24 Demineralizer Regenerant 0.0043 MGD One Unit - Continuous 28 Steam Generation Blowdown 0.0288 MGD One Unit - Continuous 29 Pidioactive Waste Effluent 0.0005 MGD One Unit - Intermittent 30 Secondary Plant Leakage 0.0072 MGD One Unit - Continuous 31 System Chemical Cleaning 0.088 MGD One Unit - Intermittent t 'page 6 of 9 4 t

NEW ENGLAND POWER COMPANY NEP 1 & 2 L " Schematic of Water Flow" Backflush Operation (continued) Point Description Flow * ' Notes 32 Internal Plant Treatment 0.088 MGD One Unit - Intermittent 1. 33 Discharge Structure 1130. 7 6 MGD*

_ Backflush Mode. - Acts as Intake 34 Intake Pumphouse-Cire. Water Side 1067.4 MGD**

Two Unit - Continuous 35 Intake Pumphouse-Service Water Side

63. 36 MCD Two Unit - Continuous 36 Cire. Water Heat Load 1067.4 McD**

Two Unit - Continuous - 37 Service Water Heat Ioad

63. 36 MGD Two Unit - Continuous 38 Intake Transition Structure 1130.76 MGD Two Unit - Continuous 39 Intake Structure 1131.0175 MGD Backflush Mode - Acts.as discharge

- Flow rate are based on nominal design values. Head loss changes and biofouling could cause nominal flows to vary +10%.
- - Backflush flow rates provided here are based on the average fflow occurring during the 6 hour period when flow direction is reversed and heat treating is completed. During this period, flows vary from the maximum to zero as flow reversal takes place. However, this average flow rate is based on a worst case ambient and therefore maximizes flows for the backflush mode of operation.

3 1 Page 7 of 9

GLOCK ISL AND PL ANT WELL ST ORM FIRE SOUNO F1 ELD WAI E R PONO l l l l -1 ,1N TA K E 6 19 20 1,,2 32.G;t ST RU C T U RE 0.28b 19.5 AS RE0yIRED c F 4 OEMlN. } FIRE SYSTEM PO T.( 9 MAKE 10 SAN IT. ( SYS* 0.272 0.016 lp INTAKE 3 12 Il69 2 -P U M P-.- CHEM. s HOUSE G3.36 0.17G CLEAN. AUX. 13 BolLER [10144 WASTES CIRC.WAT ERl 4 j S SERVICE INTERNAL 'hA0 ^ I7

T HEAL LOAD 1169.21)

G3.36 t M - DE MIN. T- ~ 0.17G twoBG REGEN. STEAM 15 GEN. KEY 0.05% BLWD. -POI N T NO.' NUMBER i R AD. 6 l DISCHARGE 16 XXXX'FLUW l N B -*9 E TRANSITION WASTE g 1]32.Gi STRUCTURE 0.0010 EFF. M.G.D.AT THIS M @ rrigT POINT g r< d 2 0 11 SEC. i m PtANT z n m @~ M 44 LEAKAGE m co m m -- " 4 0.2576 y 0.081G l r[ erb l U ~p-m 36m l 7 l OlSCHARGE LE AC HING 18 21 SETTLING @"jw y 1,232.8976 STRUCIURE FIELD (10304 19.5 BASIN m m m g m

U bE n

001 003 002 g t. p 4 m -...n. e-v, ,,.-e m --,--.-as ..e s. +- w-a ,1-- - -, -.

NEW ENGLAND POWER COMPAtN NEP 1 & 2 " Schematic'of Water Flow" Two Unit Normal Operation Point Description Flow

Notes 1

Intake Structures 1,232.64 MGD Continuous Two Unit Operation 2 Intake Pumphouse-Cire. Water Side 1,169.28 MGD Continuous Two Unit Operation-3 Intake Pumphouse-Service Water Side _ 63 36 MGD Continuous Two Unit Operation 4 Cire. Water IIeat Load 1,16928 MGD Continuous Two Unit Operation 5 Service Water IIeat Load 63.36 MGD Continuous Two Unit Operation 6 Discharge Transition Structure 1,232.64 MGD Continuous Two Unit Operation 7 Discharge Structure 1,232.8976 MGD Continuous Two Unit Operation 8 Plant Well Field Pumping System 0.288 MGD Two Unit Maximum Flow - Intermittent 9 Demineralizer Make-up O.272 MGD Two Unit - Intermittent ~ Flow 10 Potable and Sanitary 0.016 MGD Two Unit - Intermittent Flow. 11 Secondary Plant Leakage 0.0144 MGD Two Unit - Continuous Flow 12 System Chemical Cleaning 0.176 MGD Two Unit - Intermittent Flow 13 Auxiliary Boiler Wastes O.0144 MGD Two Unit - Intermittent Flow 14 Demineralizer Regenerant 0.0086 MGD Two Unit - Continuous Flow 15 Steam Generator Blowdown 0.0576 MGD Two Unit - Continuous Flow 16 Radioactive Waste Effluent 0.0010 MGD Two Unit.- Intermittent Flow 17 Internal Plant Treatment 0.176 MGD Two Unit - Intermittent Flow i 18 Leachi.-g Field 0.0304 MGD Two Unit - Intermittent Flow 19 Storm Water Runmff Allowance -19.50 MGD Two Unit - Intermittent Flow 20 Fire Pond Pumping System As Required Two Unit - Intermittent Flow 21 Settling Basin 0.0304 MGD Two Unit - Intermittent Flow i

- Flow rates are based on nominal design values. IIead loss changes and b ofouling could cause I

nominal flows to vary +10%. Page 9 of 9 4

~.. _. . = _. _ ~. FORM APPROVED OMB No.1%.R0100 "^ " ^ STANDARD FORM C - MANUFACTURING AND COMMERCIAL R 1 00 2 ( 9 8 2 SECTION Il. BASIC DISCHARGE DESCRIPTION fiumpsete this sectton fus each ditt hasee enddated in Section I, item 9, that is to surface waters. Itus includes discharges to municipal sewerage systems in which the wastewater does not on 'hrough a treatment works prior to being discharged to surf ace waters. Discharges to wells must be riescribed where tnere are also discharges to surf ace waters from tnis f acility, SEPARATE DESCRIPTIONS OF EACH Ot$ CHARGE ARE REQUIRED EVEN IF SEVER AL 015CH ARG4.5 O RIGiNATE $N THE SAME FACILITY, All values for an existing discharge snould be recte-sentative of tne twelve previous months of operation, if this is a proposed discharge, values should reflect best engineering estimates, a ADOtTIONAL INSTRUCTIONS FOR SELECTED ITEMS APPE AR IN SEPARATE INSTRUCTtON BOOKLET A$ INOlCATED. REFER TO BOOKLET BEFORE FILLING CUT THESE ITEMS. 1. Discharge Serias No, and Name a. onschar,e seriai No. ao,a 001 (Unit 16 2 combined) (see lastructions) Atlantic Ocean discharge through multiport diffuser

n. oischar,e Na,ne 2ai.

Ceve name of decharge, if any. (see in structions t c. Prev 6ous Discfiarte ser6at No. If previous permit application g was made for th6s discharge (see 2ols item 4, Section 1), provide prevb out discnarge serial number. 2. Discharge Operating Cates a. Discharge Segais Date Ifthe discharge described below is in N/A operattori, give the date (within 2ota best estimate) the discnarge YR MO

began, A

D. D6scharge to Segin Date if the discharge has never occurred Dut 85 October is planned for sorr'e future date, 2o2D give the date (within Dest esth YR MO mate) that dsscharge will began. c. Descharge to End Oate i f dis-charge is scheduled to be descon. g tmued within the nevt 5 years, 2o20 give the date (within Dest esti-YR MO matet tne discharge watt end. I 2. Engineering Report AvailaDie J Check 6f an eng.neering report es l avadante tn reviewmq agency upon reoutsi. (see inierucooni) 2o ES See note item 26 4. Discharge Location Nametne political Doundaries within whgn the pomt of discharge is located. Rhode Island I state 2o4a Washington County l couniv 2o4n Town of Charlestown of appiscaciei city o, rown zoac ,3, S, Discharge Point Description Discharge #5 into (cneck one); tsee instruc tinns) Stream (includes ditc h*s, arroyos, i and other latermittent watercourses) 2o04 CST R Lake OLKE Ocean @OCE i Mumcipal Naa.t ary Wastewater Transpert System CMTS l j Mumcipal Comeined timtary and i Storm Transport System OMCs E PA Form 15$o.23 (7.n} Thus neefion confoons o pages.

Ol5 CHARGE SE RI AL NUMut H 00 0 POR AGENCY U$E u..n.cioas storm waior ytanieort R I O C 2 0 9 8 2 Syst em .QSTS . Weil tinjectiorO CWEL Other Co7s i e 1 f f 'other' es checked, specif y I20$b j 6. Discharge Point - La t/Long C 6v e the precise location of the point ( of discharge to the nearest second. OEo 20 u,y 4 1 3ge Latitude - 206s 41 2 Longitude 2040 DEG MIN $EC 7. Distnarge Rece# wing Water Name. i Name ine ware,way at ine paini. 20?* of discharoe.(see 6nstructions) Block Island Sound, vicinity of East Beach Charlestown, Rhode Island For Agency Uw Fct Age 9Cy Use if the discharge is througn an out. M ai or. Minor Sun I 303e fall that eu tends beyond tr'e shore-207m hne or is be'ow the mean low 207s water hne, complete item 8., L. i 8. Of f shore Discharge 2600 4 Dessnarge 06 stance from Shers 208a ,ee,

n. oiicna,,e oe,ih sei.. Waior 27 (Approx.) depth. increases with distance from shore 5""*"

' water depth at the first nozzle is 30' MLW. 9. Discharge Type and Occurrence a.' Type of Discharge Cneck whetner the discharge is con-209a 0 (con) Continuous tenuous or lntermittent. (see instructions) O (int) Intermettent D. Oncharge occurrence Days per Ween Enter the average num-2099 2 days per weew ber of days per ween (during periods of discharbe) that che enarge occurs. c. Disenarse Occurrence -Months 6f ines discharge normally 20s OJAN OFEe OMAR OAPR necr ates (either Int er me tten tly, or continuously) on less than DMAY OJun OJuL O Auc a year around nases tencludmg snutdowns for routine mainte-OsEa - O oCT O Nov ODEC nance), check the months dur. 6ng the year when tne discnarge os operating (see instructions) Comotete steins 10 and 1I if " inter-mattent" #1 checked in item 9.a. Otherwise, proceed to item 12,

10. Intermettent Oischarge Quantity N/A State the average volume per dis-210 thousand gallons per discharge occurrence.

charge occurrence in thousands of gallons. I 1, Intermettent D6scharge Duration and Frequency a. Intermettent Desenarge Duration PerDay State the average 211a bours per day number of hours ocr day the discharge is operating b, Intesmittent Docnarse Frequency State the average 2118s tscharge occurrences per day asumber of disCnaroe occur-rences per day durmg days WMeft G81 Charging. 12, Masamum Flow Peries Give the teme period in wmcn the maximum 212 From to flow of this descnarge occurb month montn E P A Form 7550.23 (7.73) g

UtSCHARGE St NI AL NUMIE R 's 99 l'(IRM A l'I*ktbWI) OMOlb.!$8-Hol00 FOR AGENCY USE 9f8 I CO 2 C 2

13. Acuetty Description Give a

.. Nuclear fueled electric Renerating station producing narrate.v oextiunon os ac tivit y 2124 producmq ?nss descharge.(see waste heat deminerall:er regenerant, steam generator in ii,uc i,r,n si blowdown and minor concentrations of radioactive wastes 14 Activit y Causeng 0estmarge F or each sic Coce wnic m descrimes tne aclivit y C Ads 409 this discharge, supply the t ype and nia statum somont rit esther the ra er matereas consumets 11 tem laat or ine product periouced (Itern 140) en the urs ts e soccified les T ab4e 1 of t he last ruc-tmn Boo = let. For SIC Codes not issted en l aose I, use raw fMateriat or product *on units normalsy used for measuring production.(see tristruCleons) a. Raw Materials I.f am emum Une t Snared Descharges 9C Code Name Amount / Day (See Tage, e) (serial Numtier) flea ll) i (2) (3) l (4) (6) _. N/A I i l i O Procus ts Atas murn Unal Shased Descmarges StC Lvoe Name A n'oun t /Da y (See Taote il (Serial Numbev) ttee (1) "I' (?l l 131 i fa) f (5) I l l 4931. Electric Power 2300 MXe 7.1 l 001 i t i E PA Fer* 75$3 73 (7.731 ll-3

+ OISCH ARCE SEltl AL. NUMBE R 001 FOR AGENCY USE R I ( 0 20 9 8: 13, Waste Abatement Descritie tha w aste,'tiatement The station includes extensive waste

- - ^**i'"""'"

4-i 2tSa

Narranve,

$'Si.,l0*n d,".5 2 Se'"' treatment facilities which operate as an integral Instructions) part of electric power production to ensure minimal discharge. i ESEPAR ESECRE EPUKfPS o wnie Anaiement c oei aise (13 g23 p, o7t Ac i2$u'ct7o'n s'o"oNeI* DCHEh! DHYSIC DSTOPD c43 g, g3 $Isei$ >rN*a!Ic'n'a'ev.91 RECOVE RECYCLE LOCALS ,,3 gy g3 o in. o.orr in wnicn iney occur LUSEOF 0610 NIT on or3 PSCREE u unis me, n o, ciaj PSEDI5f n4i PSEPAR n53 CNEUTR CCLDIS SLANDD TEVAPO (16) n,3 n3 RHEATR CPHADJ n9) (2oi <2n (22) (23) (24) (25) Note Section 15 Waste Abatement - The codes listed under this section represent some of the waste abatement systems which are designed into or are part of the station process. The waste abatement practice cannot be fully described here due to their complexity and number. A detailed description of the waste abatement practices can be found in the U.S. Nuclear Regulatory Commission Construction Permit application. (Primarily Environmental Report Sections 3.4, 3.5, 3.6 and 3.7) Docket Numbers STN 50-568 and STN 50-569. E P A F orm 7556-23 (7 - 13)

i a 015CH ANC.E SE Rf AT. NUuBER FORW APPROVED gy Sg gggg 001 rom Accuev ust 9ff B I C0 2 0

16. Wea ste wa't* C astaclet.ltsCn 1

Cneck the tus bvs..se ed.n s carstits sret omcn as paesarst en the ef f tutrit (denf%4rge ws:st). Tms ceterm.aation is to be based on usuas analy6il I es t$4.I estnasic 4 as ennleutt sout) c P.s aueicr y P4 ra me15 e cy i 216 E 216 i s. a. m ( id..i Copper m e a ts ul t+4 2 E A su n.onu lion 4 m w. l u u t ta.8 ) X (hrnuc notrogen Lc4J Dof uS U1051 Nattate M ync5tum ..t he.t..'i t lRPel? Nuote klarip ncse nobl> 01055 i P!Ng th rus kler ury l s in e e. 3 7l u k suti re \\loh t-Jenu m in e#4 5 D1062 l u.fiste Ndel i _ot>I4 s 01067 X t h ulf it e 5denium es ?40 01147 _s Silver lir.im m!c 7 1.b 'o till17 7 4 hbo & Putawum p ri4 o X (> W )7 l '3 4..=le Salmm eve 720 Wi*f 29 I lu.i sie T h4thurn eaeti on059 Atwinnuus 1i',ruu m utlut 01152 X Anio.np Im

i. lice 0 1 :132 A m.x 2ix 01tm2 otis2 h r3 n. inn A h We >*

. o t..o i ? 74051 tu imn ChloruutcJ orpnw sompounds' - notu? ?4u52 ll ef m) PeglkIdC1' 010.2 74usJ GJm non Od ard greaw iault m 5.so X l i.a.,an Phe nols om s e. )?:w ( A..li %,s ta. Lent s i l ..n,u tem 1

i ti..o..mn e

I c ria,rm< i 3 oi. 4 t 5mm iX See item 26 f I s...i. 4 dorm 1%f ere r ' LJ asa tmt)

L"""

74"5" _L See item 26 si.<. % wi.,w.u, .. ne..u i.s. o.a.., ca m< ni, in nem 2 6 e% $4& 4 I k ln4 (lI4' (h 50I1.,b O Y I, d r* % N!Oh A 5' N III.a ) /( re It ! In I(rm$ d ! iY d4 kehkJ I t *ImSAIt) n..u s + s n s.I ne. l. o s.: M <..wn.-s \\.ns elea on.al A vern for the to trale, rat St.rs. mce:1on li its. St, / 14 li.%1 I.;.r u w. I n. L. o4. e u l l', . n.n.\\ g n. ). L\\ nl.mr i.n ie4 2 H 2.50, here id72.as

i. p o..t by s utm nen t rs j Ti t #. 4 f f.s K q !.u w.. L.i <!w I :: 1..rs crwn). I t!w I s a nd in s. lon,

t. m r. id. ..! H-.. ten u. k t. r .44

olSCHARGE SERI At. NUMBER FOR AGENCY USE R 1 0 0 2 0 9 8 2

17. Description of Intake and Descharge For each of the parameters ilsted below, enter en the appropriate *>om the value or code letter answer called for.(see instructions) in addition, enter the parameter name and code and 4H required values for any of the following parameters 6f they were Checked in item 16 ammonia, Cyanide, aluminum, arson 6C, DerylHum, cadmium, Chromium Copper, lead, mercury, nickel, setentum, tinC, phenois, oil and greale, and sniortne tresxsual).

f Efnuent Innuent j E P H 3 e v "E 5 "= y, i i 7 b y g, >50 3554 Parameter and Code f } iE @I

s a

g 3, x 217a ? fe $? fy 5 3$ l3 g y 5.!]!15$}5 !$ Ii !i l Sii f 5 "i ?

==- 2 3, - m sowc< mow ^ ~< z< e (1) (2) (3) (4) (5) (6) (7) (8) \\ Flow

MGD 1,233

\\ 1,233 1356.3 5005' N 1 N pit Unos 8 (, 8 8.5 00400 / Temperature (winter h

r 39 78 34 82 74021$

\\ Temperature bummer) [ op 74027 66 105 60 112 liiochemical Oxygen Demand \\ til0D 5 day 1 1.24 '\\ 1.24 0.51 2.25 mgl 00310 Chemical Oxygen Demand (COD) \\ mdi 1,325 1,325 971 >1,750 [ 00340 Total Suspended (nonidterable) \\ Sobds \\ mvi 6.47 ,/ 6.47 1.37 19.27 00530 Spectne Conductance 4 0 5.0x10' micromhus/cm at 25+ C 4.9x10 4.7x10 00095 Setticable Matter (residue) \\ / 4.27 4.27 0.86 13.57 $45

0ther discharges sharing intake dow (scrial numbers),(see instructions) c* To ' be determined oc* Values presented above were obtained from analysis of ambient seawater samples collected on a monthly basis in the vicinity of the proposed intake locations.

Increases in the above values as a result of plant operation will conform to applicable guidelines, however changes to ambient seawater concentrations resulting from plant operation will be insignificant. E PA Form 7550.D (7.73) II-6

't. i FORht APPROVED OAfD No.138-R0100 DISCHARGE Sf:HI AL NUMBER 001 FoR AGENCY USE R I O C 2 0 9 82 -/

17. (c ont'd.)

Innuent l Ernuent v-D u w i t l' -t 5 e

t

- ;f a

i 3 .3, !i l Prameter and Code - k IS I E ? ? D': !??$ at g t3-a >3o e 3c< l. $27a ) = ? a !3. 21 a - >. jj u .i. o x ]y! =,, cet ' scc 2 m 8 , o &.v 22 e a. *y a s, i 4 1 4, . 9E5 t 9 e-e*J 3 e u x

s 2

2Owo< M o w c. - u. < Z< U (1) (2) (3)' (4) ($) (6) d) (8) No greater

Chlorine residual Unknown' than n_?

(1) n nM (free) (see item 26) .JJG/L l l 011 and c,reame ( 1 utc / I. twnn

at discharge conduit prior to mixing at entrance to discharge pipe "to be determined
- - unknown but some expected (1) Attempt to meet requirement may be modified is. mani cantrois cue <x is tne foe.

2te Iowteng plant controis are available in accordance with 40CFR 423.15(J) and 423.23(J). for tnis discharge. Alternato power source for melor @ APS I pumping f acility. Alarm or einergency procedure for OALM power or equipment f ailure Complete item 19 si desenarge es J frofM Coollnq and/or $ team water { generatton and water treatment { additives are used.

19. Water Treatment Additives if the i.

discharge et treated with any Con. d!t roner, innsbitor, or algecide, antwer the f ollow6ng' Na0CL (Sodium hypochlorite) a. Name of Material (s) 2194 l b. Name and addrett of rnanu. eacturer 19m Not selected st this time 1

c. Quantity toounds adoed per

~ Ilnknn e 219s munion gennas of water treated). LL 7 E P A Per* 755u-23 (7 73) 4 e r -.,--n ,n-r,- w-u -m.- ,r, o w ~, ,-,v,,-.. s -m.-,-,,~~,-- ,,,--r-w-< r ,v,w-mc.-r-,~,,-, w se

_m~ l' a 4 OtSCH A AGE $E RI AA, NUAlgE R 0011 roa acENCY un o B 1 C.( 20 9.8 2 i & Cbea*<at compoupoa of these 219ef addsteves bee m.structionsl. - E + y Comp *te stee'*s 20-2$ if tnere is a thermat docmarse l le 4. asscoated witm a steam and/or powe+ generatson i paast, stees ermH. resecteum te'enery, os any nine' r manufactuetag osocess) and the totas descasepe tsow,s 10 mdtion Sanons per day or mora, peepstructional = I l

20. rnermie Desenarse $*ures Check 229 5

the aspropeute Hem (st inexating s tee hete o8 the discharge. ' (see f east ews tionst Botier Isaowoown. OBLSD Bower Cnerrocas Clesams O SCCt. Asn Poco Greertow OAPor o t$ouer Water f raatment - En400** OEPSD tor erowdown EOCrP 0 4 or Cnas s ed ptants - Eta ent a u from Air Poputton controf Deveces Concense Cc.onat Water $COND Cooe.r1 f oaer Bioedown ' ECTBO l biaautettureng Peocess O ' 'r 8 8t Other OoT*a

21. Onsnatte /Receessag s'es ter Temper.

ature Ostferenes Cave the massmuta temnerature i 6.ef fetef'r"e Detween LP*e ' ~4aafge aN re'eveae =st ers in s meet and winter uceratene ct moittons. (see sastructions) 39 s 39 W.ater 1219 4

22. Orschar,e Temperature, Rate of 19 *F.%r max. (See Dote' Item 26).

Chante Pee Mous 222 j Cave the meatmurn g osssoie rate of a f emDer'ature CPar#re Pef h04ef Of l d scriar9a undee operatiag con. 6 droo% (see erntructsorts) 1 i 2 2. Water Temperature, Perceptde l mepeet (Frequency of Occuteence) i In tne taOW Delow,eaftf the temperatute wmch is escetoed 10% .< ne vue, s oe tne vue. is o, the year and ftot at AFI(masimum. rearm iemo-atures.. (see mst,uct mi F,eavency e4 occu,rence io% sw n, t va.. mum i I '67. 3*r $8.7 cr170.2 9!72.8 9

a.

. ia e w n rem o .tu.'

222, (LutPreCl io naturae C hanges)

I D. O.ScrSaf ee Water temperature 2234 106 ** l07 Pr 00- 29 *111. Fr 1*5 2e, Water antase Veteroty - 224 teethec. =de (see enstructions) I 2s. aeie ti.M r,.no c.e tme eenem o, 22s l i S_,,,,,,, 3 't

e. m m.avies. team Sia,t ee j

w aie< temp-aiu e,ne to dacame 5 Of cocil*1 water, (see instructeor*s) l a l'

Determined from one year record; at Station A, bottom location.

Station'.A is J located in the vicinity of the proposed intake locations, and is approximately 2.800 feet from shore and 3300 feet west of the Charlestown Breachway. 1 i l 1 l Il8 1 't en verw isnn s-m i 1' I i -_..-._--a..._--..-.__...a~~~~-.-.~--~,--~~--------------1 i

l: x DISCHARGE'#001 s NEW ENGLAND POWER COMPANY' NEP 1 AND 2 SECTION II, ITEM 26, ADDITIONAlrINFORMATION General Note on Section II' The discharge -(#001) discussed in this.section is primarily of waste heat, domineralizer regenerant and steam. generator blowdown. Other constituent's of the discharge may consist'of small concentrations cf radio-active effluents, cleaning fluids and small amounts of oil and grease. This flow is discharged through a submerged multiport diffuser to Block Island Sound of the Atlantic Ocean. At various times during the. year, it is necessary to backflush the system (reverse the' flow using the discharge as the intake and i vice-versa) in. order to limit marine fouling on the intake tunnel. Backflushing characteristics are described in discharge 005. I e t i i 1 e II-9 ., ~ . ~......... -.... _. - - -..... _ _ _,. _ _........ _,. -..... ~

y .e s A 6 ) -s ~ DISCllARGE'#001 NEW ENGLAND POWER COMPANY NEP 1-AND 2 SECTION. II, ITEM 26, ADDITIONAL INFORMATION Section II Item 3.,' Additional' Information Engineering Report Available - U. S. Nuclear Regulatory Commission-Construction Permit Application sub-mitted August 2,1976, Docket Nos. STN50-568 and STN50-569. Section II, Item 6 ' Additional Information Discharge Point . Discharge. #001 for NEP 1 and 2' is.a submerged multi-port diffus'er with the inshore end,. originating at a'MLW depth of 30 feet. 'It is expected that.- the diffuser will have 34 discharge ports. ' The discharge ~ 1ocation as given lg in Item #6 is the location of the beginning of the: diffuser. The' diffuser i is oriented in 'a genera 11y' southerly direction'with the diffuser ports oriented. in a generally southerly direction. s Section=II, Item 12, Additional Information Maximum Flow Rate .Under normal operating conditions, subject only to variance in pump characteristics caused by tidal changes, maximum flow rates are constant year round. However biofouling of tha circulating water system can cause the flow rate to vary i 10% from the nominal' design values, i II-10 e.-. ..,. - _ _. - ~.,... ~.. _. -.. -. _....... -... -..,

J DISCHARGE iOO1 NEW ENGLAND POWER COMPANY NEP l-AND 2 n SECTION II, ITEM 26, ADDITIONAL INFORMATION Section II, Item 16, Additional Information Radioactive: Isotopes.which may be present in effluents are as follows: 1) Bromine 83,84,84

12) Niobium 95 2)

Iodine 130,131,132,133,134,135

13) Molybdenum 99 3)

Rubidium 86,88

14) Ruthenium 103,106

4) Cesium 134,136,137

15) Rhodium 103m,106

16) Tellurium 125m,127m,129

5) Chromium 51 129m,131,132

6) Manganese 54 7)

Iron 55;59

17) Barium 137m,140

8) Cobalt 58,60

18) Lanthanum 140

9) Strontium 89,90,91-

19) Cerium 141,143,144

10) Yttrium.90,91,91m93 20)~ Praseodymium 143,144 11)

Zirconium 95

21) Neptunium 239

22) Tritium 3 Ion concentrations of isotopes which are present in the discharge will comply with all applicable federal regulations.

Chlorine: Discharge from NEP 16 2 will conform to the chlorine effluent limitations specified in 40 CFR 423.15(J), Standards of Performance for New Sources for Steam Electric Power' Generating Point Source Category by the U. S. Environmental Protection Agency. Consistent with the provisions of 40 CFR 423.23(J) the applicant will attempt to conform to the following: concentrations of free available chlorine in waste water discharged from the NEP 1 6 2 cooling water system shall not exceed an average concentration of 0.2 mg/l and a maximum concentration of 0.5 mg/l at the outlet of a discharge conduit corresponding to an individual unit for a total of 2-hours a day maximum. No discharge of chlorine is al- ~ lowed from one unit main condenser while-the other unit main condenser is . Otherwise the applicant will demonstrate to the region- .is being chlorinated. al administrator that the units cannot operate at or below this level of chlorination. The water system is continuously chlorinated for both units. However, the applicant intends to demonstrate that it is necessary to main-

tain continuous chlorination of the service water system in order to. assure proper function of the system throughout the life of the plant as provided by 40 CFR 423.23(J) and 423.15(J).

,t 11-11

1 1 DISCHARGE #001 NEW ENGLAND POWER COMPANY NEP'l AND'2-SECTION II, ITEM 26, ADDITIONAL INFORMATION Section II, Item 17, /-dditional Information-The Quantity of Discharge has been assumed as the maximum flow values for Discharge #001 which occurs at completion of construction of Unit 2 and Unit i normally operating and constitutes the following: . Circulating and Service Seawater Flow 1,232,640,000 gpd Demineralizer regenerant, steam generator. blowdown, secondary plant leakage (see note below) and system cleaning 257 600 gpd TOTAL. 1,232,897,600 gpd (Other flow conditions are presented in Attachment 2) Column 2: As explained in Section 1 Item 12, the diffuser discharge includes seawater used for cooling the plant as well as a small amount of process water (domineral i zer regenerant, radioact ive waste effluent, secondary plant leakage and system cleaning). Influent for the process water is taken from the NEP 1 and 2 groundwater wells located north of the plant proper on the plant site. Influent seawater is treated by screening in the pumphouse located on the site and also by intermittent chlorination administered at the pumphouse. The traveling screens have' 3/8 inch mesh through which.all seawater flow passes prior to entering the circulating or ' service water pumps. Intake water for Discharge #001 is supplied from the following sources: Atlantic Ocean 1,232,640,000 gpd Plant Ground Water Well Field 257,600 gpd TOTAL. 1,232,897.,6 00 gpd NOTE: The ground water used to produce demineralized water is the only intake source treated prior to use in the Station. This treatment consists of filtering, degasifying and demineralizing. 'l II-12 .~.

DISCRARGE Il001 NEW ENGLAND POWER COMPANY NEP'1 AND 2 SECTION II, ITEM 26, ADDITIONAL INFORMATION Section II, ' Item 22, Additional -Information Discharge Temperature, Rate of Change Per Hour: During startup and shutdown the discharge temperature can be expected to change substantially. Power level increases; or decreases on the reactor and turbine generator systems can be such that 19 F/ hour variation can occur. The 19 F/ hour variation-is the expected engineering limitation on the' system.~ Assuming that the unit has reached an initial power level of.2.5%, the power level can be increased at 5% everyE10 minutes. Therefore, the-maximum rate of change of 380F/2 hours can' occur resulting in 19 F/ hour variation. During constant power level operation only tidal. level' changes would be expected to cause variations in itscharge temperature. Therefore the maximum temperature change during co e4 ant power level operation can be expected to be approximately 1 P' Section II Item 23, Additional' Infostocion Based on temperature records from April 1974 to March 1975. Section II, Item 24, Additional Information Water' Intake Velocity: The design intake approach velocity is 1.5 f ps. I 4 .II-13 ... ~..,.. _.... _ _. -.. _ _ _ _ _ _,. _ _ _,. .. _.... _, _. _. _.. _ _ _... _ _. - --.., _ I

FORM APPROVED OM8 No, JWR0100 ' " ^ ' " "' STANDARD FORM C - MANUFACTURING AND COMMERCI AL EI 00 2 0 9 8i SECTION Il. BASIC DISCHARGE DESCRIPTION Compiete thss section for each discharge indicated m Section I, item 9. tnat is to surf ace waters. Th<s includes discharges tu municipal sewerage systems in which the wastewater does not go througn a treatment works prior to being discharged to surface waters. 0:scharges to wetts must De described where there are also discharges to surf ace waters from this facility. SEPAR ATE DESCRIPTIONS OF E ACH Ol5 CHARGE ARE REQUIRED EVEN IF SEVER AL DISCHARGES ORIGIN ATE IN THE SAME FACILITY. AH values for an en6 sting d6scharge lnould be feDre. sentative of the twelve previous months of operation. If this is a proposed discharge, values should reflect Dest engineering estimates. ADOf flONAL INSTRUCTIONS FOR SELECTED ITEMS APPE AR IN SEPARATE INSTRUCTION BOOKLET A5 INDICATEO, REFER TO BOOKLET BEFORE FILLING OUT THESE ITEMS. t, Discharge Serial No. and Name 002 a. D6scharge Serial No. 22t3 (see inst ructions) D. Olscharge Name 20lb Ninieret Pond - Storm Water Discharge Give name of disc harge, if any. (see InltruCtfons) C. Previous Olscharge Senal No, if previous permit application was made for inis desenarge (see 20te item 4. Section II, provide preve. ous discharge sertal number, 2. Descharge Operating Dates a. Discharge Began Date ifthe discharge described below is in operation, give the date (witnen 202a b Dest estimate) the discnerge YR MO

Degan, b.

Descharge to Begin Date if tne b distmarge has never occurred Dut 80 June is planned for sorne future date. 2029 give the date (witnen best esti. YR MO mate) the discharge will betift. c. Discharge to End Date af dis, charge is schecused to be discon. tinued within the next 5 years, 202e b._ give the date (within Dest est6 YR MO 4 male) the d<scharge w611 and. 2. Engineering Report Available Checir of an engineering report as available to reviewing agency upon reauest. nee initructionii 20s O See note in Item 26 4 Discharge Location teame the politica6 boundarles w6then which the point of discharge is located. Agency Use Rhode Island Sme 2044 2u, Washington County County 204D ?,04e ^ Town of Charlestown of aponcaone) City or Town 204 y, 5. Discharge Point Description Discharge is into (check one); (see lost ructions) Stream (includes ditches, arroyos, and other intermittent watercourses) 20sa OSTR Lake OLKE Ocean COCE Municip46 54metary Vrastewater Transport System OMT5 Muntcipei Combined knitary and storm Transoort System OMC5 E P A F enn 7550.23 (7.n) This section contains 9 pages.

UtSLI4AHGL blHI AL NUMtsLit 002~ FOR AGENCY USE Mun6cipal Storm Water Transport System C STS west Unlection) OWEL Other DOTH Tidal Pond H other in checkeo, specay 20s. 6. Discharge Point - Lat/Long Give the precise location of the point ' of disCnarge to the nearest seCond. North 41 21 u,u 48_.sEc 20.e oEc Latitude 71 oEo .}_._. M I N 2.b SEC ton,4 tude West 20sn 7. o.so e neceiving water Name same ine waierway at tne point 20 Ninigret Pond of discharge (see instructions) For Agency Use For Agency Use if the rbscharge is througr. an out. fall Inst en tends oeyond the shore-207D 303e M a or Minor Sub ilne or is below the mean low water line. complete item 8. y 8. Offshore Discharge 0 a. Discharge Distance from 5hore 20$a teet b. Discharge Desch Below Wate' 0 Su rf a ce 200b feet 9. Descharge Type and Occurrence 4 Type of D6scharge Chec k whether the cascharge is con. 209a tenuous or interm;ttent. - (see Instructions) $ Ont] Intermittent D. Discharge Occurrence Days per Weel: Enter the average nurru 20gb Edays per week ber of days per weeis tduring periods of discharge) this dis-Charge occurs.

c. Olscharte Occurrence -Months if this discharge normally 20*e OJAN OFEe OMAR O ApR ooerates (either intermettently.

or continuously] on est thaa OMAY OJUN OJut O AUo Year Round a year-around balls (excluding shutdowns for routine mamte-OSEp O Oct ONov, D oEc nance) check the months dur-ing the year when the discharge is operating. (see instructions) Complete llems 10 and 11 if " inter. mittent" is checked in item 9.a. Otherwise, oroceed to Item 12.

10. latermittent Discharge Quantity N/A State the average volume per sin-210 thousand gallons per descharge occurrence.

Cnarge occurrence in thousands of gallons. I t. intermittent Discharge Duration and Frequency a. Intermittent Discharge Duration Per Day State the average 211e bhours per day number of hours per day the discharge 65 oporating. 4 b. Intermettent Discharge Frequency State the average 211b Mdischarge occurrences per day number of ditcherge occure rences per day during days when discharging. Intermittent

12. M4Almum Flow Period Give the time period in which the max 6 mum 212 F rom to

) flow of tnis discharge occurt mon th montn E P A l'orm 1550.23 (1.73). g

ot%CHEDGg sy ns Ag NUMetR 002 pggy,,ppgoygg 0^'8 N ' '" ~# # FOR AGENCY USE LI 0 0 2 09 8 2 ? narra$,'Ie de* ' ' ', 'iotson o$c*o'vity Storm water runoff, excavation dewatering associated aisa DeoduCang this discharge.(see with the construction and operation of a nuclear ,$iruc oon o fueled electric generating facility, e 14 Activity causing Discharge For each $1C Code whch descrit>es f *e activity causing this discharge. supoly the type and maximum amount of either the raw material consumed (item 14aj or the product produced (llem 140) in the units specified in Table I of the instruc-tion Woouet For $1C codes not listed in T aole f, use raw material e or prodvation unf ts normally used f or measuring production.($ee instruc tions) a. na. uaiersais N/A M a ximu m Unit Shared Discharges SIC Code Narne Amount / Day (See Taole O (Serial Numbei) 2144 ~ (1) (2) (3) (4) (5) D. Products Man smum Unit Shared Descharoes Sic Cnde Name u niou n t /Od y (See facie () ($ernas Number) I i ... - + - -. - - N/A E P A F orm 7550 23 (7.73) [j.3 1

DISCc4ARGE $Eltf % NUMBE R 002 l l FoR AGENCY USE i .R I C 0 2 09 8 2 ...... e A..ie ment ",'$ **,'0".'",'e[*',','e',"en, The syste'm eonsists of a primary sett1ement aise u,,,,,,,e, practaces used on stus cinnasge witn. or er n.,r iwe. (see basin with sufficient retention time to remove Instru C tkont) ' construction associated suspended solids. Local traps upstream of the settling basin will remove i oil and crease concentrations above allowable limits prior to discharge to the receiving water. D. WHie Abatement Codes 2t$b ())' bNM (2)' N b (3) us.n, ine cooes ust a in t me (s) PSEDIM (5) ' (6) i it of the testructmn Booklet. describe ine waste abatement Of ocesses f or tmtl d,unate m (7) (at (9) in, oroce sn wnbcn eney occur

f pospo4e.

(10) (11) (12) l ? l ,(13) (14) (15) (16) (17) (18) ^ (19) (20) (21) l (22) (23)' (2 4) (25) l. t l t i P + 11-4 ' (P A Fw 7$$0 2J (7.73) t 9 m ...i .-w=s cw.... ww...,.- ..m.-am-....--s, >.m3.,__.._.

oISCHARGE SERD AL MUMBER FORM APPROVED OMB No. US-R0100 002 POM AGENCY U$E R I CO 2 0 9 82 is. wntewater enaracterinucs 4 check tne com beside'eacn constituent wn6cn is present in the errsuent (dischar9e watert. This cenermmat6on is to be Dased on actual analysts or best estimate (see instructens) ...~. - E E Parameter y Parame ter g 216 e -216 e b A Color CoPPef 00080 01042 X ,*g Ammonu Iron 00610 01045 X-Orgsmc notrogen Lead 00605 01051 Nitrate Ma6nesium 00620 00927 X Nitrite Manpnese 00615 01055 Phmphorus Mercury . 00665 71900 Stilf a te Molybdenum 00945 X. 01062 Sulfide Nickel n0745 01067 X Sulnie Scienium 00740 01147 litornide Silver 71870 01077 Chloride Pota ssium 00940 X 00937 Cyanide Sodium 00720 00929 l'luor nf e Thal'uum (K651 01059 Aluminu m Titanium 01105 01152 a Anomony Tin 01097 01102 A rse nic Ztne 01002 01092 X Beryllium Alguides* 01012 74051 Harium Chlormated organg compounds

1 N1007 74052 Horon Pesticides
01022 74053 Cadmium.

Od and gresse 01027 00550 X Calciu m x Phenols 00916 32730 Cobalt Surfactants -010.17 38260 X Chromium Chlonne 01034 X 50060 l'ecalcohform bacteria Radioactmty

74055 74050
Specify subst.inces, compounds and/or elements in item 26.

PestisiJeHinweticides, f unpendes, and rodenticides) must be reported in terms of the acceptable common names specalwd in Accelitable Common.%mes and Chemscal Names for the Ingmlient Statement un l'estscide f.sbc/s. 2nd I dilson, Lnvironmental Protesllun Agency Washington. D.C. 20250, June 19 72, as required by subsection Ib2.7tbl of the Regulanuns for the Enforcement of the l'ederalinseepende, l'ungt.ide. and Rodenucide Act. '**. All are constituents in the ground water, it is assumed that the chemical May be present if spoil pileproperties of the runoff will be similar bo those found in the ground water. 115 ver w ccurs. E P A Feem 75 50-M (7-73) ... = . --..~..

DISCHARGE SE RI AL NUMBER 009 FOR AGENCY USE R I G O 2 C9 8 2 17c cescription of intake ana oisenarse g For eatn of tne parameters listed below, efiter in the aDDroDraate Dom the value or code letter answer Called for.(see instructions) in aooition, enter tne parameter name ano cooe and all recu6 eo vaiues for any of the foisowing parameters 6f they were checked in item 16: ammoma, cyanide, aiuminum, arsenic, eerytinum, cadmium, enromium, copper, read, mercury, nick el, seienium, one, onenois, oit and grease. ) .na cnio,ine t,e,.ouan. Innuent Efnuent x ,8 Y E $~5 5 0 1 0 m ~ ~- o., o au o g Parameter and Code E 3 2Sh 3 >oO >0< w x 217a 3 4 $$4 j ! ? 3 {"* 3 $ ? 3' O d.5

y

5i i

l$ Eli l!$$ if li I 0

==o O sowo< zowc w<, z< m 23 (1) (2) (3) (4) (5) (6) (7) (8) i ./ N/' lIow* caisom per day million gpd Unknown unknown 0 25.26 EMX 50050 \\ pil Unas 6.0 8.0 (M1400 / T mperature (wmter) ,/ ,g, ,g, g 74028 Temperature tsuminer) _,/ N/A 50

r 74027

/ j [ Diochemical Oxygen Demand (800 saay) 1.81 1.81 0.63 10 mg/l 'y 00310 / Chemical Oxygen Demand KO6)* * * * / mvl 1200 / 1200 601 1739 m)340 l \\ / e**** / Total Suspended inunfitterables s Sohds \\/ mvl 5.77 '/ 5.77 1.45 00530 Specinc Conductance micromhodem at 25* C unknown unknowr unknown WRN5 Setticable Matter (residue) '" U ' 2.87 2.87 0.71 00545 'Other diu harges sharing intake llow (scrial nuinbets).(see instructions) to be determined "* Ph of ground water 6.2, Ph of storm water runoff unknown "". Temperature will depend greatly on storm water temperature which is unknown Based on values presently found in the ground waters, effluent characteristics will conform to all applicable guidelines. EPAFem 7550-23 (7 73)

s FORM APPROVED OMB No. !$8-R0100 OlSCHARGE SERI At. NUMRER 002 POR AGENCY USE F I C C 2 C 9 8 2 5

17. (C ont'd.)

Innuent Efnuent x 3 m P y=? u u 2-2 a x u i m ,5 EE E $ 3' $ $ 5$M 3 1 f Parameter and Code 3 we. f& QGE i ti?j-bs it?h a s $c i l a*x E u ECu Mx .o g 15, = 2,i

n. j ?,

? 25LyI 7W&j u - x x.y g -- E-E a= n -o x-u ao 230. SSa c Xowo< Xowc w< z< 4 (1) (2) . (3) (4) (5) (t>). (7) (8) Oil & Grease 15MG/L N/A N/A N/A l r j

Unknown but expected l

None visibly seen

18. Ptant Controls Check if the foi-210 l

lowing plant controls are available

or this discharge.

] Alternate power source for maio* pumping f acility. { Alarm or emergency procedure for power or equ6pment f ailure Cornplete item 19 it discnarge is from cootmg and/or steam water I generation and water treatment l additives are used. I i

19. Water Treatment Additives if the d6senarge is treated with any con.

ditioner. inniDilor, or algicide, answer tne following: N/A

a. Name of Material (s) 2194 f

th Name and address of manu- ) f ac turer 2199 f l I i c. Quantity (pounds added per 219e mistion gasions of water treated). l l E P A Form 7550 23 (7.73)

DISCH ARGE $ CHI AL NUMBER -002 FoR ScEEv u z LI O 0 2 098 2 d. Chemical cornposit6cn of these 2194 additiv es (see inst ructions). 4 Complete items 70 25 If there is a thermat discharge (e.g.. associated watn a steam and/or power generation plant, steel rn6ft, petroleurn refinery, or any otner manuf acturing process) and the total discharge flow is 10 milHon gaslons per day or more. (see 6nstructions)

20. Thermal D6scharge Source Check -

220 NM the appropriate 6 tem (s) indicat6ng the source of the dlKharge. (see instructions) ' Boller Blowdown OBLs0 Boiler Cnemical Clean 6ng C GCCL. Ash Pond Overflow OAPCF Roller Waler Treatment - Evapora. O EPSD torStowdown Oil or Coat i ered Plants - Ef fluent OoCFP' from Air 88cilution Control Devices Condense Cooling Water ' OCOND Coos 6ng Tower issowdown OCTeO Manufacturing Procens OMFPR Other OOTHR

21. Discharge / Receiving Water Temper.

. ature Dif f e rence Give the manmum temperature dif ference t>etween the discharge and receiving waters for summer and winter operating condit6ons. N/A op, (see in structions) Winter 221D OF.

22. 06scharge Temperature, Rate of g F:/hout Change Per Nour 222 Geve the m.imimum onssible rate of temperature change per hour of desCharge under operating Con.

ditions. (see instructions)

23. Water Temperature, Percentile Report tF requency of Occunence) in the laDie below, enter tne temperature wnscn is exceeded 10%

of the year, 5% of the year,1% o' N/A the year and not at all(maximum yearly temperature). (see instructions) Frequency of occurrence la W l W Maximum a. Intame Water Temocrature' 223a F F op op (Subsect to natural changes) th Olscharge Water romperature 2J3e 2a. Water intake Velegity 224 f ee t/seC. (see instructions)

25. acioni.on Time G..e ine ienain ov 22s

.x/.A minuies Design basis storm for settling basin S"'ie' rte,%"e7u,E,$".S'2Ina,ge during construction will be the one in of eool.ng water. tice 'nitruct'ons) ten year storm on the as;ociated catchment. Normal operation design basis storm will be the one in one hundred year storm on this associated catchment. E P A F orm 7550 23 (7.73)

_m .~ ~ FUNM Al'I'Hubh D . OMB No.158-R0100 1 oi5 CHARGE SE RI AL. NUMBE R FOR AGENCY USE T B I O C 2C 9 8 2

26. Add 6H onal inf orma no n 226 nen

__,_ yonnanon s Desi en nf the settline bnsin will nrovide for suf ficient retention time to treat the one in ten year storm during construction for run off from the construction related catchment as well as construction dewatering flow. The settling basin will also be capable of handling the storm water runoff from the one in one hundred year storm associated with th* normal operation catchment. The design basis for the system will.be provided as a supplement to the Environmental Report one year prior to commencement of construction. Flows due to storm water runof f in excess of the above basis'will be by-passed directly to Ninigret Pond. 15 Oil and grease removal will occur prior to discharge to the settling basin. Local sumps and traps will be utilized where necessary up stream of the settling basin to minimize the potential for oil and grease discharge to the settling basin. 17 Column 5. Maximum Flow Allowance for maximum flow has been included by use of crobable maximum rainfall rate falling on the catchment defined by the actual finished plant area of 34 acres and the contruction dewatering value estimate -1i of 4000 gpm. Actual runoff from the construction related catchment, including ll construction dewatering is not expected to exceed th3 s flow. Retention time of the settling bast.n will reduce the suspended solids as required by applicable guidelines. 1 l i l i U \\ E P A Fem 7550 23 (7 73) II 9 .l

FORM ttPPROVED OMG No.138-R0100 FOR AGENCY U$E STANDARD FORM C - MANUFACTURING AND COMMERCIAL t R I O O 2 0 9l0 2 SECTIONil BASIC DISCHARGE DESCRIPTION Compaete tmss section for each dium ree indicated in Sect 6on 4, item 9. t%at is to surf ace watert a systems en which Ine waltewater doe $ not 90 through a treatment *ork 6 Pred to De'n9 diSCnatted to lurf ace water $.Th+t includes discMarget to Or% Charge $ to *eftl r" ult De described where 19ere are allo d Whar9es to nurf ace waters from thet f achisty. SEPAR ATE DESCRIPTIONS OF E ACH 015CHA RGE ARE REQU8 A EO EVE N iP SEVE R AL Ol5CH ARGES ORIGIN A TE IN THE S AtaE F ACILlTY. AH vatues for an esisting discharge thould De feDre= tentative of the twas /* oreveous montns of operation. If tmes 15 e procoSed d'Scnarte, values should reflect best engineering estimatet J ACOlflONAL f NSTRUCT80NS FOR SELECTED ITEMS AcoEAR IN SEoARATE INSTRUCTION BOOKLET A$ INotCATEO . REFER TC BOOKLET 8EFORE FILLING OUT THESE ITEMS. f. Destnarte Sertad No. and Name 003 4 Descnaree Serial No. 20fa (see inst ructions) San ta n M arge - Lea h g M

o. O,icn,,eName 20i.

a 4 c.ve name of disena,,, ir any. flee lastruCt 60rvs) C. Previous Otscnar$4 Serial M *. If orev4nus cermit aponcation g

al n'ade for thel descharge (lee 200s item 4. Section 1). opovide orav>

ous discharoe ser6at number. 2. Descharge Operating Da tes a. O*ssmarte se$an Date ifthe dFlchar9e described Deiow it in g coeration. geve the date twitNn 202a best estarriate) the oiscur% VR MO Degan. .L

b. Onenarse to Betea Date if tne discearee has newes occurred but 80 es planned for torne future date.

202, gave the date (witman Dest esth YR MO mate) the dsMharge will Degen.

c. Olsenarte to End Oate if d+ cNarge it Mheduled to be dricork g' Linued withen (Pe neat 5 yeart 2024 g+ve the date (witmen Delt esta YR MO mate) the destmatte *ut end. 3. Engeneering Reeert AvaHaDie Cneck it an engineertne recort es avsetacie to rev*ewtat 49cecy upon reavesi, tiee mstrumonia 202 O See Note item 26 4. Dusnarte Locsi on Name Ine onist6 cal coundaries witNn wnrem the point of dischar9e is located. Agency use State 204a Rhode Islw.id ,ud County 204 Washington County 23, Town of Charlestown ,,,,,,,,,,,c,,,,,,,,, S. Oncnarte Po+nt Deseristion 08sChar9e 51 solo (Chec k onel". (see mstrucleons) Strearn (incsud6 d.tc het arroyos, and other intermittent watercourses) 2 09s CSTR La=e OLxE Ocean DOCE Mun.cioal $anatary evastewater Transoort $vstem CMTS Mungepai con oened %mtary and Storm f ransport System CMC 5 i,l I E PA perm 1$$Q.2) 0.73) Thss nactton contatns 9 pages. ...~ m ~..-.~......,-m.

DISCHARGE SERI AL NUMtES4 003 FoR AcaNcy use l uun ..a sio.m waee, t,.mport R I O O 2 0 9 8 2-' S y stem C ST S West tinfectiont O w ri. Otmee O c t6e n otner .5 eneeseo, ioeca, 20s. Leachine Field 6. oisenarte Point - Lal/teng Giv e tne treecise tor.ation ne the point of enscnar9e io the nearest second. .d.l.o ec 2 2,,, 0,,,1,,,3 g e Latitude North ma v Lon, tude West 2. 71 Occ } 2_uiN J.,2 sce v 7. ossenarge Recetving Water Name No fte tne waterway at tne point 207a N/A r of descna#9e (see Instr ctions] u For Agency (Jse Fo# A9ency Use It the distmarge as throutn an out' ud u, u Mh tan tnat en tends beyond one shore-2973 une or s Deiow the mean low water hae. comotete item 8. 8. Offshore 06scharge N/A

a. Descharte oestance from shore 20ea feet t

a cessnarse oesta seiew waie' N/A surface 204b feet S. Descharge Type and Occurrence ) a. r,,e e. o.scn a,,e com. wnether tne dischaave is con-20$a S (coni continuous tmuous or mterrmttent. (see lastructions) - O tent) entermitieni D. o scharge occurrence oeys per 7 Week Enter tne seer 494 nurn. 2090 days Def weem ber of days Def week Eduring Der *ods oi dischar9el this dit-charge occurs. j c. otscnarte occurreact -Montns if ines descnarge normalty tote CJAN OFrs Quaa CAPR operates testner latermettently. or contmuou9v) on less (nan CVAv CJUN O Jut O^* year round 4 year.around cases {escluding sn tdowns for roottne mamte-05EP O Oct ONov Deze u nancel, cnecu tne months dura eng the year when the Osharge es operatmg (see snstructions) l Comosete items 10 and il of ~6ntera mit te*1" is chec =C.... f tem 9.a. Otneewise, proceed to item 12.

10. Intermittent oischarte Quantity N/A enousand,anons pe, d senar,e occurrence. See Note 1. to Item 26

/ Siate the avera9e vo6ume per dis-210 charge occurrence 6n thousands of i taisons. i a i1. intermittent oncnarse ouration and Freewenty 4. Intermettent Dessnarge ouration Perr3ay 5 tate tne averaee 211e NIdLhoues per der numbe+ of nours pee day the disenar9e es ocerat6 sg. i

o. intermettent o.senarse F reeuency $ tate the avetate 21It SEChaf 9e occurrences Der day number of oisena# 9e occut-rences per day during days

nen dischaignag.

I i2 us. mum Fiew ee,ied c _,ine N/A t une per ted an wnic a t ne +.e

aum 212 F rom to ttow of tars disenar9e occurt mon th mo n t *t E P A Feean 7$50 23 (7.73) p*

,,,,...--,,m,,.. . ~... - . - -... _.,.. -. ~. -, -..,.. - -. -. _., - - - .c.~

m OtSCHAAGE SERI AL NUM1ER FORM APPROVED 003 ous no. us-nosoo POR AGENCY USE R I 0 02 0 9 8 2 e a J Discharge of sanitary waste from construction i3. Acu.ity oe. neuen c ve ' na,,aii,. deu,ioison oe acovity 3 t.sa D,iguc,iae ips discna,*.tsa. and operation of an electric generation facility into an underground leaching field. e

14. Astlesty Causing Discharge For each SIC Cnde wfiich deuribes -

the activety causing this discharge, lupply the type and maalmum i amount of either the f aw materiel Conlumed (ltem lea) of the Pf oduCt penduced titem ido) in the units spec 4 fwd en f aDie i of the InStruC-Don soouet. F or sac Codes not usted in T acie 1, use raw m4terias of Dioduttson units normally used for measurme producieon.(see instructionsi N/A a. naw Maierws Manimum U nit Shared oisenarges .l Mac Code Name Amount /oay (See TaDie 1) (Sarlat Number) I ties - (1) (2, (3) (4) (S) ) i 1 .1 i 4 D. produ e t. N/A Masamum Unit Shared oischarges sic Code Name AmounUOa y (See Taois il (Seria{ Number) Stee (1)- I (2) (3) (4) (5) I i \\ m ve.. nse.n v.n, u3

015 CHARGE SERI AL NUMBE R 003 POR AGENCY USE R 1 0 0 2 0 5 8 2 e t $, West. Abel.m.nt E.'i$iUln'*w'."t.l'U.',".ni The sanitary waste discharge includes standard 8 2is. n,rativ.i Dr.CilCOs us.d on this disCM.f g. witn. enee n tr tiv.. (s.. septic waste discharge abatement practices. The instruc tions) system includes a septic tank, dosing tank, distribution box, and leaching field. The system will be designed and constructed to meet all applicable " Rules and Regulations Establishing Minimum Standards Relative to Location, Design, Construction and Main-i tenance of Individual Sewage Disposal Systems"- 1 Department of Health. State of Rhode Island, ESEPAR LOCALS

OMONIT

n. wasi. An.iement coa..

aise ti) g, g, vsing ine coons usi.a in Taos. PSEDTM

CCLDIS S LANDO n or in. inuruction soou.t.

g3 g) g) a.scric. (n. west.

o. tern.nt proc.sses f or this disch rg. sn (7)

(8) (9) _ tn. order in which they occur it possion.. (10) (11) (12) -(13) (14) (15) (16) (17) (18) (19) (20) (21) (22) (23) (24) (25)

Chlorine disinfection of the effluent from the septic tank may be utilized.

If chlorine is utilized for disinfection chlorine monitoring equipment will be installed. l II-4 EPA P.rm 7$50 73 (7.73) m._--,

' FORM APPROVED Ot% CHARGE SERlAL NUM3ER OMB No.153-R0100 003 POR AGEPeCY USE R I OD 2 0 9 8 2 e

14. Wastewater Charetterishes

( Crioca the nos desico esen constituent wnecn is present in tne effluent (discnaree water). Tnis cetermenstion is to be casea on actuet analysis - e, nest.stiman ue..nsoumonu = Parameter 5 Parameter 5 216 2 216 g A A Color Copper 00080 01042 Ammonu tron 006111 X 01045 X Orgame natogen Lead 006u5 X 01051 Nitrate M agnesium tM)620 x 00927 Nitrite Manpnese 006l5 X 01055 Phosphorus Mercury 00665 X 71900 Suisate Molybdenum 00945 01062 ~ Sul0dc Nickel ,00745 01067 Sullne Scienrum 00740 01147 B rom ale Siher 71870 01077 ( hiinide Potassum 00940 X 00937 Cya nide Sodium 00720 00929 I luoride Thalbum (MS 51 01059 Alaminum Titanium 01105 01152 Antununy Tin 1097 01102 0 A twnic Zinc 01002 Olt92 lierythum Algicides

01012 74051 N atium Chlottnated orgame compounds' 01007 74052 llo:on Pesticides'

_0._10.22 74053 Cadmiu m Od and grease 01027 00550 Calaum Phenols 009th 32730 Cobait Surtactants 01037 38260 Chtunnu m Chionne 01034 50060 X 1 ecal soliform bacteru Radioactmty

1 74055 5

74050

Speu(> substances, coinpounds and/or ekments in Irem 26.

i Pesth ides tinmocides, tuneicides, and rodenheides) must be reported in terms of the acceptable common j namn speatiest sn Asxeproble Cummun Names and ClienskalNames for theingredwnt Statement,ut l'estu/c / sheh, 2nd t ditkin.1:nsuunnient.1 Pn.innon Agency, Washingtun, D.C. 20250 June 1972, as a supued in Sahecuon iti2.7tb; ut the Regulathins for the 1.nforcement or the i ederal inntichte, I une ide, arki Rodenth nJe At t.

- Chlorine disinfection of the' effluent may be required.

E P A Form 7550 71 (7 71)

Ot$ CHARGE SERI AL NUMBER 003 POR AGENCY USE

17. 'DescrtDtion of latake and Olscharge For sach of the parameters listed below, enter in the appropriate Dom the value or code letter ant.ver called for.(lee instructions) in addition, enter the parameter name and code and all required values for any of the following parameters if they were checked in item 16; ammonia, cyanede, aluminum. arsense. beryllium, cadmium chromium, c opper, lead, mercury, nichtl. selenium, sinc. onenois, oil and groese.

and chlorine trosksual). Innuent Ernuent P g Fj 3 e Parameter and Code E5 3 k ollIIA 'l }W d}S!i $E h. k } x, =E G 7' WU3 P e3 e a; 15 m s 33C a h$d54 5806 CA $< 4 (1) (2) (3) (4) (5) (6) (7) (8) Flow

60,000 60,000 16,000 75,500

/y gpd gpd gpd Gallons per day gpd 00056 30,400 30,400 s spo er-s\\ pH Units s 00400 6.2 x 6.0 9.0 N Temperature (winter) x's N/A 35 'F 74028 N s N / T.emperature (summer) '/ N/A 50 p 74027 ./ \\ [ N/A N/A N/A 4 Blochemical Oxygen Demand N/A N (BOD $4ay) N mg/l j 00310 / \\ Chemical Oxygen Demand (COD) .x "8/I N/A -\\ N/A N/A N/A 00340 / Total Suspended (nonniterable) 'q Solids N/A N N/A N/A N/A k* mg/l 00530 e / Specine Conductance f micromboslem at 25' C unknown unknown unknown k* / 00095 'kttleable Matter (rendue) s, ml/l \\ N/A N/A N/A N/A go343 'Other discharges sharing intake now (senal numbers).(see instructions) II4 EPAfree,7550-23 (7 73)

FORM APPHOVED l s OMB No.158 RQ100 015 CHARGE SERI AL NVMIER Sanitary Waste 003 roa AcanCv use B

QC 20 9 82 e

17. (Cent'd.)

Induent Efnuent 9 6 u 1 : ? r a s X si Paf ameter and Code 5 [ hEf h )yN )gdk 8 we 3 4 225 x $22L E 2 2 ie ?1 2-A x x s ecj eec2 8 - js t 2 ju co x m s, - 11 axtaE. i, oxtw , 2 en e 1 c. -o - -

s s e

.e. 2 a. c sowc< z o w.-e o z< a es (1) (2) (3) (4) (5) (6) (7) (8) unknown :$nT 3 5 Chlorine residual-free mg/1* Oil and grease N/A N/A N/A Ammonia N/A .N/A N/A N/A N/A N/A

at discharge from the dosing tank if chlorine is used
- to be determined
  - none visible unknown but trace expected

18. Plant Centrols Check !f the fob al8 tower *g Diant Control $ are ava6 fable for thil dlScharge.

Alternate power source for major @ AP$ ' pumping f acility, 1 j Alarm or emergency procedure for dALM power or equipment f ailure Complete item 19 If discharge is from cooling and/or Steam water generation and water treatment additives are U544.

19. Watee Treatment Additives ifthe discharge it treated with any con.

dationer, inhibitor, or algictde, answer the following: Name of Materiaim aina Na0C1 (Sodium Hypoclorite) may be used to treat 1 effluent prior to discharge to leach field.

o. Name and address of manu.

Not selected at this time ai,.

c. Quantity toounds added per 219e Unknosm motion gallons of water treatedh

. E PA Form 7$50-23 (7-73) -.. ~... -, _

9 DISCH ARGE SERI AL NUMBER Sanitary Waste 003 FOR AGENCY USE RI 0 02 0 9 8 2 l d. Chemicas composition of these 21Se j additives (see instructions). ] Crwnplate teams 20 2$ if there is a thermal disch.irge ' (e.g., associated with a steam and/or puwer verseration plant. steel mut petroleum refinery, or any other manufacturing process) and the total discnarge flow 6s 1 t o million gallons per day or more. (see Instructions) 1

20. Thermal Discharge 5eurse Cneck 220 the appropriate item (s) indicat6ng tne source ef ine disenar,s. (we' N/A i

instructions) Boller Olowdown OstsO. noiler Chemical Cleanir,g CeCCt Aan Pond Overflow OAPor soller Water Treatment - Evapora-DEPBO tor Blowdown Oil or Coal Fired Plants - Ef fluent COCFP from Air Pollution Control Devices Condense Cooieng Water OCOND Cooinne Tower Blowdowa OCToo Manuf acturing Process OMFPR Other OOTHA

21. Discharge /Rece6ving Water Temper.

N/A ature Difference Give the maelmum temperature dif ference between the discnarge and receiving waters f or summer and winter operating conditions. ( ee instructions) S m er op 0 Winter 221b F,

22. Discharge Temperature, Rate of Change Per Hour 222 QoF./hout Give the manimum possible rate of temperature change per hour of discnarge under operating cor9 ditions. (see Instructions)

22. Water Temperature, Percentile fleport (Frequendy of Oscurrence) la tne table below, enter the temperature wnich is enceeded 10%

of the year. 5% of the year,1% of the year and not at allimaulmum N/A yearly temperature). (see instructions) Frequency of occurrence 10% 5% 1% Maximum F OF op op a. Intake Water Temperature 223e (Sublect to natural cnances) OF OF op op b. Olscharge Water Temperature 222e

24. Water intate Veiecity 224 N/A f eeim e.

(see instructions)

29. Retention Time Give the length of 22s N/A minutes time. In minutes, from start of water temperature rise to discharge of cooHng water. (see instructions)

E P A f orm 75$0-23 (7.73)

- - _ - ~. _ FORM APPROVKU OMB No.158-R0100 Ol5 CHARGE SCRI AL NUMBE R FOR AGENCY USE 003 BI O C 2 0 9 2 2

s. Aeoitionai ineormation 324 item inf orma tion 3

Information required for application to the Rhode Island Department of Health for the NEP Sewage disposal system will be prepared in the future by United Engineers 6 Constructors, Inc. Philadelphia, PA. 17 Sewage flow is intermittent. Normal operation of the Station will generate an average 16,000 gpd of sewage : and 14,400 god of auxiliaev b.giler wastes. Construction work force will cenerate an average 60.000 gpd of sewage. The leaching field is designed to handle the maximum exoected flow of 72,500 gpd. Use of chlorine may be. considered to. ernne rho a f flitant nrior to discharge to the leaching field. j i l l 1 l 1 l EP A Form 7550 23 (7.73) II-9 .. -. ~..

FORM APPROVED System Flushing 004 NEP 162 OM8 No lhRol00 STO.NDARD FORM C - MANUFACTURING AND COMMERCI AL R I C 0 2 0 9 82 t-SECTION II. BASIC DISCHARGE DESCRIPTION Complete this section for each discharge ind cated in Section 1, item 9. that is to surf ace waters. This 6ncludes discharges to munecioal sewerage systems in whiCN the wastewater does not go througn a treatment works Orlor to being discharged to surrace waters. Discharges to wells must be desctobed where there are also discharges to surf ace waters from this f acitity. SEPAR ATE DESCRIPTIONS OF E ACH Ol5 CHARGE ARE REQUIR E D EVEN IF SEVE R AL 015CH ARG ES O RICIN ATE IN THE S AME F ACILITY. All values f or en esisting discharge should be repre* sentatrve of the twelve previous months of operation. If tMs is a proposed dischar9e, values should reflect best engineering estimates. ADOlflONAL INST RUCTIONS FOR SELECTEO ITEMS APPEAR IN SEPAR ATE INSTRUCTION BOOKLET A5 INDICATEO. REFER TO BOOKLET BEFORE FILLING OUT THESE ITEMS. 1. Discharge Serial No. and Name 004 a. Olscharge Sortat No. 20ta (see Instructions) Construction related discharge system - chemical

o. Dischme Nam.

20ib c.v. name of disena,,0. if any. Cleaning of completed piping systems (see In structions) c. Previous 06scharge Serial No. If preveous permit apphcation NM was made for tnis discharge (see 209. stem 4. Section O. provice preve-out dacnarge serial numoor. 2. Osscharge Operating Dates

a. Discharge Began Date ifthe discharge described Delow is I" A

operation. give the date (witnta 202a best estimate) the discharge VR MO began. I b. 06scharge to,Begin Data f f the I discharge has never occurred but r is planned for some future date, 202t d dMSUSC give the cale (*ttman best este-YR MO mate) the discharge will begin. l c. Dessnarge to End Oate if dis-charge is scheduled to be discore tinued within the next 5 years. 202e 87 bEUSE" give the date (within best est). YR MO mate) the disenarge witi end. 3. Engineering Report Avaitatie Cneck sf an engeneering report is avrfame to reviewing agency Woon r eq ues t. p

Instructions) 20s O

4 Ossenarse Locauen teame the poniksi bounoaries wa sin whicn Agency use the poent of desemarge es located. Rhode Island S tai. 204. ,m Washington County County 204e 2044 Of spoticaonel City or Town 204c TOWN Of Charlestown f ,w S. Distnarge Point Description Desenerge is intn (checu oner (see instructinns) Stream (6ncludes ditches, arroyos, and other intermit tent watercourses) 20se 057 R Latte OLxt oceaa COCE Mun*Cloal % Inst try Wastewater Transport System OMT5 MuruClGal Combined 5.initary and Storm Transport System OMCS EPA fstm 7550.23 (1. 73) This section conf arns 9 pages, i y r,y -yw.-,r-- ,,~na er a - --w wa w wr,e,.- --we~ ~ --ws -w, +~m. e se --~ -cv e'w-

nn~

~ ~ ~ ~ ^ ~ ' - = ' = - - = ' " ' ' ' ' ' ~ ~ ~ ^ - - - ~ " " ^ ' ^ ^

Dlbt,,HMHOL 3e.H6 80.14UMtit. H 004 1 FOR AGENCY USE Municipai storm water Transport R 10 0 2 09 8 2 System Osrs Weil (Injection) OwtL Otner @ O TH j,. pine,. i cn.,g,o,, pee,#y 2osn Discharge to man-made holding lagoons 8. Discharge Point - 1.at/Long Give the precise location of the point t ' of discharge to the necrest second. Latitud. Nortti 2es. 4l oEo 21 u,y 55 3ce 71 39 35 Longitude West 2osti oso y,, 3ge 7. Oascharge Rece6ving Water Name Name the waterway at the point to7e of discharge.(see instructions) None For Agency Use For Aeency Use if the discharge is trirough an out-M aior Minor sub 303e fait tnat extends beyond the snore-2079 line or is below the mean low 247s water 16ne, ccmplete item 8. 8. Offshore Descharge N/A

a. 06scharge 06 stance from Shore tota b.

Discharge Depth Setow Water g Surface 204D feet 9. Otacharge Type and Occurrence a. Type of Discharge Check whether the discharge is con. 2osa O (con) continuous 16nuous or intermittent. (see instructions) $ (Int) Intermettent D. Discharge Occurrence Days per Week Enter the average num. 2099 _ days per week unknown Der of days per week (during periods of discharge) this dik charge occurs, c. Olscharge Occurrence -Months if this dsscharge nosmally 209e OJAN OFEB OMAR O APR operates (either intermittently, or continuously) on less than OMAY OJUN O Ju' O AUo a year around bases (excluding Car To d shutdowns for routine ma6nte-Osca O ocr ONOV Oote nance), check the months dur. Ing the year wnen the discharge is operating. (see instructions) S complete items 10 and 11 if "mter* mittent"is checked in item 9.4. Otherwise, proceed to item 12, io. intermitie at O$scharge o"'"'"' 3 2x10 State the average volurne per dis-290 thous.and gallons per discharge occurrence. charge occurrence in thousantis'of gallont t 1. Interm6ttent 06scharge Ouration and f'requency a. Intermittent Olscharge Duration PerDay State the average 211a .2d hours per day number of hours per day the discharge is operating. b. Inrarmittent Discharge Frequency State the average 28lb discharge occurrences per day unknown number of dischar9e occur-rences ocr day during days when discharging, ts. u..imum reewpe ed civ. ine N/A time period m which the maasmum 212 F rorn to flow of this disenarge occurs. month mon E P A f orm 7550-23 (7.73) g -m... ..~ + -n ,-,-wm r r,un, -m,. m,, . +, en. v +n-n -+-.n- -,wn., --e,-,, ~, - -

.m DISCHARGE $ERI AL. NUMIEft 004 FORM APPROVED OMB Ns.1J8.-R0100 4 POR AGENCY USE R J 0 0 2 0 9 8 2 ? "' ,'$le o'e's*c'r'ipiion cNc*n'vity System chemical cleaning associated with nar a aisa ,aou5l;7,t" ""'*-("' construction of electric generation facility prior to operation. Systems consist of various pipe lines connectin'g the process equipment including the main steam lines

14. Activity causing Discharge For each SIC Code wnsch describes

-l the activity causing this discharge, supply the type and man 6 mum amount or either the raw materiat consumed it tem 14a) or the product produced titem.140) 6n the units specified in Taele i of tne Instrue. tion Boostlet. For SIC Codes not listed in Taoie 4. use raw material or production units normatty used l for measuring production.(see 1 instructions) a. Ra uatoriais N/A . Max 6 mum Unit Shared Olscharges 96C Code Name Amount / Day (See Table l) (Serial Number) ' j 2144 Ul (2) (3) (4) ($) l I 1 l I 4 e

n. product

N/A Maximum Unit Shared Discharges SIC Code Name Amount / Day (See Taoie I)

(Serial Nurnber) $l44 kI) (2) (3) (4) (I) i l j E P A Form 7$50.23 (7 73). ll3 .~. ~ ,.... -.. -..~.-

DiSCH ARCE SERI AL. NUM1E A 004 j FOn ACENcY USE R :.0 0 1C 9 8

n...... A....

c.Ni$*ir$~w".."O's.".,i Discharges associated with cleaning of completed sin. s.n. t... : fiS'.* ",f,U,,".i7.'. /*,."" station pipelines will be directed to a series of Iftlina t Dont) lined holding lagoons. These lagoons provide for settlement of materials flushed from the pipelines and makeup for additional cleaning during constniction. PSEDIH ESEPAR LOCALS , w e it. A.. t....i c.... zise ti, ,3, v 9 in. econ i.it.o in Taoi. SIANDD MOTHER ti of te. Instext.on Boo =#et, (4) (5) (6). o.w rio. t m. w este.o.t em.nt proCMies f or tM. ditcM.f y. In (7) (8) (9) ts. oro.*.n whKn tney occur if possiD... (10) (11) (12) (133 (14) (15) (16) (17) (14) (19) (20) (21) (22) (23) (24) (25) a tP A Fw= 7550.23 (7.73)

FORM APPROVED . DISCH ARGE SERI Al. NUMEER gyg go,gyg,ggggg 2-004 FOR AGENCY USE R 1 0 02 0 93 2

14. Wastewater Cneracterutics Cneck the bon beside each constituent wnich is present in the erfluent toisenar9e water). This determsnation is to be based on actu.t er641ysis or best estimate 4see instructions)

Parameter Parmeter 216 E 216 e n. a. Color Copper 00080 01042 X Ammonu tron 00610 U1045 X Orpnic mttogen Ic J 00605 01051 Nitrate - Magnesium 00620. X-00927 - Nitrite Manganese 00615 Ol055 Phow horus Mercury 00665 X 71900 Sulfa te Mol> bdenuin 00945 X 01062 S ull'ide Nickel 00745 01067 X Sullite Sele mum-00740 01147 It rorn uje Siher 71870 01077 Chinride Potassium 00940 00937 Cy.imde Sodium 00720 00929 i fuoride Thallium 00951 08059 Alummum Titanium 01105 01152 Antunony Ten 01097 01132 7 Arenw Zme E -01002 01092 Beryllium A lge. ides

01012 74051 ilarium Chlorinated organic compour6' OI001 74052 Boron Peshcid es' '

01022 74053 e Cadnuum Oil and grease 01027 00550 X Caictu m Phenols t)0966 32730 Cnbalt Surfactants 01017 38260 X Chrnnuum Chionne 01034 50060 1 eeal renform bacteria Radioac tnity ' ^I l74055 74050 'Specif) substances, compounds and/or elements in item 26. Pestit kles tinwetguies. funpicides, and rodentietdeu must he reporter in terms of the acceptable ccmmoa names meettwd in A cceptohle Common Names and ChemvalNames or the ingredsent Statement. n l'estu ide Labels 2nd Edinon. Environmental Protection Agency. %shington. D.C. 20250. June 1972.os reqmred by Subsection 162.7(b) of the Regulations for the ErGreement of the Federalinsecucide, l'ungicide. and Rodenucide Act, ] E O ,.-r-v., co-, m,.... w m.,. w o e w, e ~-.- m..,,, .v.~--wi. -.w-..,-w-,w... 4... - - r.%. c m.. r y ,,,,w,c..me..m.c- ..v_en-, i

c DISCHARGE $E RI AL, NUMBER frOR AGENCV USE B I 00 2 0 9B 2

17. Description of intake and Discharge -

.i For each of the parameters listed below, enter les the appropriate box the value or code letter answer called for.(see instructions) . In addition, enter the parameter name and Code and all requ4 red values for any of the following parameters if they were checked in item 16g ammonia, cyanide, aluminum, arsemc. beryli6um, cadmium, chrorrwm, cooper, lead, mercury, nich es, selenium, aine, phenois, oli and grease, and chlorine (residual). s l 4 Inlluent Efiluent t x 3 1 I M Il Parameter and Code 5 B 4 b o w 217a 3 4 DS4 4 !?3E 2 !23h ! -5 0.5 I ' E t ".E ' - Et h"5k h" $ 3 k .E 3 h.M f, I#h" k"l -!l 5 7- ~ o$C 55 0 o zowo< 28wo 6< Z< m (1) (2) -(3) (4) (5) (6) (7) (8) Flow

3 3

Gallons per day 203x10 203x10 0 203x10 N/A N/A N/A 00056 1 pil Units 6.2 00400 N/A' N/A N/A Temperature (winter) 'F N/A N/A N/A 74028 Temperature (summer) 'r N/A N/A N/A 74027 Biochemical Ox ygen Demand (Boo 5 day) N/A-N/A N/A N/A N/A N/A N/A mg/l \\ 00310 Chemical Oxygen Demand K OD) ms/l N/A N/A N/A N/A N/A N/A 00340 N/A Totd Suspended (nonfilterable) N/A mg/l 00530 Specine Conductance Unknown r micromhos/cm at 25* c N/A N/A N/A N/A N/A 0

95 y

8',' ','" W' " * "" I'"'d " I j Unknown N/A-N/A N/A N/A N/A N/A 00515 'Other discharges sharing intake floor (scrial numbers).(see instructions)

- - Dependent on incoming well water temperature
  - Dependent on system cleaned and location within plant e PA pe,- nso-23 (7-n>

11-6 i........ .m --,,,._-.----......J.-.,.._~,._.,~

i i FORM APPRO\\ED OMO No.158-R0100 015 CHARGE SERI AL. NUMagR ' 004 Foa AGesCy use P IO 0 2 0 9 82 1

17. (Cont'd.)

l ' Influent Emuent S b Paranieter and Code 5 5f 3o 3 E. 2n. I l t i2 fe ! "E U?E, ! ? ? t. l.- 2-A e = =ct 81 El 2 c-x jox a o.8. )3. 2 m u.a. g2 e2 3- = s, - m < e. 4,. a u . t no o = .!! s c aowa< xowo z< a ra ss (1) (2)~ 13) (41 (5) (6) (7) (8s t I Oil and Grease N/A N/A N/A unknown but expected to be low I

- not visible in discharge, removal by traps expected I

18. Plant Controls Check if the f ol-218 g

lowing plant controls are ava614D10 - i for this discharge. Alternate power source for major pumping f acility. A' arm or emer9ency procedure for I powes os eculement f atture Complete item 19 ff discharge is froin coohng and/or Stesin water generatson and watet treatment additives are used, l 9. Water Treatment Additives if the discharge is treated with any Con-ditioner, inhibit or, of algicide, answer the following:

a. Name of Material (s) 219e D.

Name and address of manu-tacturee 2196

c. Quantity (pounds added per alte

-l miinon eaHons of water treated). i l EPA Form 7550-23 (7-73)

mm. m. ._m .m 4 i OISCHARGE SERI AL NUMBER FOR AGENCY USE 00d 2,0'p 8 2 I R I o 0 d. Chemicas composition of tnese 2144 additives (see inst ruc tions), e compiete items 20 25 sf there 'l a thermal discharge / l (e.g., associated with a steam and/or power generation i plant, steel mill, petroleum refinery, or any other manuf acturing process) and the total discharge flow is 10 million gasions per day or more. (see Instructions)

20. Thermal Discharge Seurte Check 220 the appropriate item (s) indicating the source of the discharge. (see Instructions) '

N/A Boller Slowdown CSLBD Boller Chemical Cleaning DeCCt. Ash pond Overflow OAPOP Boiler Water Treatment - Evapora-OEpso for Blowdown Oli or Coal Fired Plants - Ef fluent OOCFP from Air Pollution Control Devices Condense C ooling Water CCONO Cooling Tower Blowoown CCTBD Manuf acturing Process OMFPR Other OOTHR

21. Osscharge/Recelving Water Temper.

ature Difference C6ve the mamamum temoerature dif ference between the discharge and receiving waters f or summer and winter operating conditions. (see lnstructions) g o, 3 O Winter 2216 F.

22. Discharge Temperature. Rate of 2

/ oF./ hour Cheave Per Hour 222 Give the maximum posseDie rate of j temperature change cet hour of disenarge under operating corw ditlons. (see Instructions) 2 3. Water Temperature, Percentine Report (Frequency of Oceurrence) In the table below, enter the i temperature which 65 exceeded 10% of the year,5% of the year.19. of the year and not at all(maalmum N/A yearly temperature). (see instructions) Frequency of occurrence 10% 5% 1% l Maximum F F a. Intake Water Temperature' 2234 ($wolect to natural changes) i F OF OF op b. Otscharge Water Temperature 2234 N/A r

24. Water intake velocity 224 oeif,e c, (see instruc tion s)

25. Retention Time Give t he length of 225 minu tes time. In niinutes. from $1at t of water temperature rise lo discharge System is a closed loop during construction of of cooiing water. neo insiructions3 Unit 1.

See note Item 26. 1 118 E P A Fem 7550 23 (7 73)

m FORM A PI'Hu \\'EU OMB No. !$8-R0100 ol5CH ARGF, SERI Al., NUM8C A FoR AGENCY USE 004 LI 00 2 0 9 E 2

26. Addition 441nf orma tio n 224 Item inf or mation Ib As noted in Item lb,this' discharge is construction related and will be routed to a series of holding lagoons during construction of Unit 1.

When Unit 1 circulating water system is operational, fluids contained in the holding lagoons will be routed to the Unit 1 internal treatment systems and the effluent-will be discharge to the circulating water system discharge. Construction related flushing fluids associated with. Unit 2 will also be routed to the Unit 1 treatment systems and discharged through the Unit I circulating water system. When unit 2 is operational, all cleaning wastes wi11 be treated within I the proper unit and discharged _ therefrom. Solid wastes removed during the cleaninst process will'be collected at acorooriate times and wi.11. be disposed of at an approved disposal facility. Concentrations of thn varinun constienenen of thin d[ncharstewillnot exceed allowable concentrations as defined in the applicable guidelines. I l E P A F etm 1350 23 (7.73) 11 9

FORM APPROVED OMB IVo.158-R0100 FOR AGENCY USE STANDARD FORM C - MANUFACTURING AND COMMERCIAL R I C O 20 9 8 2 e. SECTIONII. BASIC DISCHARGE DESCRIPTION Comp #ete tnis section for each desenarge indicated in section I, item 9. that is to surf ace waters. Then includes descharges to municipal sewerage systems in wn6cn the wastewater does not go througn a treatment works prior to being discharged to surface waters. Osscharges to weils rnust be described where tnere are also diunarges to su f ace waters from this f acility. SEPAR ATE DESCRIPTIONS OF EACH Ol5CHARG"'.4RE R EQUIRED EVEN IF SEVE R AL Ol5CHARCES ORIGIN ATE IN THE S AME P ACILITY, All values for an existing discharge shoulv De repre-sentative of the twelve previous montns of operation, if this is a proposed discharge, values Snould reflect best engineering estimates. ADDITIONAL INSTRUCTIONS FOR SELECTED ITEMS APPEAR IN SEPARATE INSTRUCTION BOOKLET A5 INDICATED. REFER TO BOOKLET BEFORE FILLING OUT THESE ITEMS. .L t. 04senarse Serial No, and Name a. Olscharse 5ertal No. 201a M (see instructions) b. Olscharge Name 'ilb Give name of discharge. If any. (see instructions) c. Previous Discharge Senal No. If previous permat appl 6 cation N/A was made for Inis discharge (see 20ls item 4, sec tion I), provide previ. ous descharge serial number. s 2. Discharge Operating Dates a. Discharge Began Data afthe discharge described Delow is in A operatton, gave the date f witnen 2024 best estimate) the disenarge YR MO

Degan, p.

Discharge te Begin Date if the discharge nas never occurred but is planned for some future date. 2029 N.I_9Ilruary give the date (withen best esti-YR MO mate) the d6sCharge will Degin. c, Descharp to End Date I f dis-cnarge is Scneduied to ce discon-N/A tenued within the next 5 years. 202c give the date (wltnio best este. YR MO mate) tne disenarge will and. 3. Engineenng Report Avasiapie Cneck if an engineering report is availabie to reviewing agency upon reauest. (see snstructions) 203 0 4. Discharge Location N.sme the politicas coundaries within whicn Agency use the point of diuna ge is located. Rhode Island State 204 County 204e Washington County ,u, Charlestown (if aposicacie) City or Town oec S. Disenarge Point DescriDiten Descnarge is ento (check one) (see instructions) 1 Stream (sncludes dittnes. arroyos, and otner intermittent watercourses) 2054 05T R ) t Lake OLKE Ocean bOCE Municipal Sanitary wastewater Transport System OMTS Municipal Combined Sanitary and Storm Transport System CMC 5 111 EPA Wem 1550-13(1.73) Thos sect 6cn confarns 9 pages. 1

005 l POR AGENCY uSE 0l9 Mu n#cipal orm water Transport R I ( 0 2 8 2 System 0 575 Well { tniec tion) O wEL Other OOTH it *other' es checked, specif y 205e 6. Olscharge Point - Lat/Long Giv e the practse locat6pn of the potrit of discharge to the nearest seCond. North 41 20 44 Latitude 206e OEG MsN _ 5EC Longitude WOSt 2068 7I DEO ).hMIN 22 SEC 7. 06senarge Receeving water Name 8"' of dlicharoe [Se*insiNion,["' Block Island Sound, Vicinity of East Beach Charlestown, Rhode Island For Agency use For Agency uw if the discharge is througn an out-fail that estonos beyond the shore-20?D -Maior Menor Suo 303e Cine or as besow the mean inw 2He water anne, complete item 6. 8. Of fshore Descharge 2 4. Descharge Destance from Shore 200a feet

o. 0;ienarge Depin sei.w waie' 21 (approg water depth at intake location is 30' MLW 9.

Distmarge Type and Occurrence a. Type of Descnarge chec w wheiner the discharge is con-203. O teon) continuous tinuous or intermittent. (see instructsons) h (int) Intermitterit b. Descharge Occurrence Days per weee Enter tne average num-20gp 2.daypper wegu, once eVery tWO Weeks Der of days per week Iduring periods of discnarge) this dis-charge occurs. c. Descharge Occurrence -Months if tnis disenaroe normally 2098 OJAN OFEB C M AR C ApR operates testher intermittently. or continuously) cn less than DMAY OJuN O Jut O Avo Year round a year around basis tescludmg shutdowns for routine maente-05tp O ccT O Nov OOcc nance). check tne rnenths dur-Ing the year when the disenarge

s operating. (see instructiont)

Complete items 10 and 11 if " inter-mit tent" is checked in item 9.a. Otherwise, proceed to stem 12. 1.

10. Intermittent Descharge Quantsty 2 P 2 6 9 x 105,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,

State the everage voeurne peer dis-210 2 charge occurrence eri thousands of gailons. I 1. Intermettent Oischarge Duration and 9requency 4. Intermittent Discharge Duratton Per Day State the average 21ta h nours per day number of nnurs per day the desenaroc is operating.

o. Intermittent Descharge I

F requenc y State tne average 21tB discharge occurrences per day, once eVery two weeks April-Nov numoer of discharge occur-rences per day dureng days once/ month otherwise when discharging.

12. - Mamemum now period osvetne Inte M ttent time period m whech the maxemum 212 From

, to flow of this discharge occurs, monta month E PA Fors= 7550-23 U-73) 47 s, 1

1 I l DISCH ARGE SE RI At. NUMIER l L FORM APPROVED 5. OMB No.158 R0100 FOR AGENCY USE R I C O2 09 8 2 ' " ' narYa'tSv". deic,'io ' ion nNcn'vity Thermal backflush of the seawater intake tunnel aina producing th6s discharge.(see instructions) of the circulating system of a nuclear fueled generating facility for the purpose of marine biofouling control. 14 Activity Caussng Discharge For each SIC Code which descrabes the activity causing this discharge, supply the type and mavemum amount of either the ra w material consumed (stem lea) or the product produced (ttom 14c) ln the units specified in Tenie i of the instruc. 16on Hookint. For SIC Codes not ilsted in Tacte 1. use f aw material or production units normaHy used for measuring production.(see instructions) a. Raw uaierms N/A Manimum Un6t Shared Discharges SIC Code Name Amount / Day (See Tacle 1) (Serial Number) 2144 (1) (2) (3) (4) (5) i n e D. Products Max 6 mum Unit Shared Discharges SIC Code Name Amount / Day (See Table 1) (Serial Number) Il44 (I (2) (3) (4) N) f 4931 Electric Gener-2300 MWe Z1 005 ation E P A Form 1550 23 (7 73) 113

m Ol5 CHARGE SERIAL NUMBER l{ 005~ FOR AGENCY USE s R 1 0 0 2 C 9 8 2 is. waste Abatement iItne w[ste aoate oe ont 215a Narrative: practices used on inis disenange witn a brist narrative. (see ficilities which nnevnte nm an intectral nnrt of the instructions) electric power production process to ensure minimal ' discharge. ESEPAR ESEGRE EPUMPS

o. waste Abatement Codes 21&b (1) g3

,33 Using the codes hsted in Table DCHEM DHYSIC DSTOPD is or ine instruct 4on soo=iet. (4j g33 i.3 descr De the waste abatement processes for inis disenarge in (73 PAPnTM RFCYCfF LOCAIS (s ), gg3 l."*,os's%'e'," * "" '"" RECOVE OMONIT ,-ng, PSCREE g o, ,. g 3, LUSEOF PSEPAR-CNEUTR g33 g43 g33 go: CCf.DTS 9 73 SLANDD (ts) TEVAPO CPHADJ (19) (20) (21) (22) (23) (24) (25) NOTE: Section 15 Waste Abatement The evdes listed under this section represent some of the Waste i Abatement Systems which are part of the station process. The Miste abatement practices cannot be fully described here due to their complexity and number. A detailed description of the waste abatement practices can be found in the U.S Nuclear Regulatory Commission Construction Permit Application (primarily ER sections 3.4, 3.5, 3.6, and 3.7). Docket numbers STN 50-568 and STN 50-569'. 1 EP A Form 7550 23 (7.73)

DISCH ARGE 5F.ftl At. NUMBER L. OMB No.158-R0100 00% FOR AGIENCY USE R I C 0 2 0 98 2

16. Vrastewater Characteristics Check the bon boude each c onstituont wruch is present in the errivent (discharge water). This ceterrnination is to be based on actuai analysis or best esumate.tsee instructiono h

f Parameter Pa ranieler 216 E 216 e o n. Color Copper OWH 01042 y A rnrnorna tron 0061b 01045 X Orgame nit rogen Lead 00605 0105l Nitrate ilJenequm 40(> 2 0 00927 hitrite \\la nya nese 00615 01055 l'hos;$borns \\lereury ._00165 7Io00 S of fa t e \\lol) bd enum 04 N 4 5 o int,2 S ull kle Nick (l ou 7.4. 5.. 01067 X Sulhie Sete n eu rn- . OO74ti.. 01147 n roinid e Sih er 71870 01077 ClitoriJe Potassium 00940 X 00937 Cunnie Sediu m 0072_0. 00929 I luor nie 'I h albu m 00954 01059 Abunnum Titannuni 01105 n!!52 X Anomoia fin 01097 of102 i Atenh Zme 01002 01092 lierylhu m A lcicides* 01012 74H51 liarium Chlormated orgame compounds' n1007 74052 lloron Pesticides * ' 01022 74053 Cadnuu ni Od and grease niO27 00550 X Calenu m Phenols 00916 32730 Cobalt Surfactants 010.17 3A260 C:iromium Chlorine 01034 50o6o X See Item 26 l'etal colatorm bacteria H idioactivity' 74055 74050 X See. Item 26 'Specu) substances, compounds and/or elements in lism 26. Pestiades tinwerkides, fungicides, and rmienucideo must be reported in terms of the acceptable o mmon. na mes rlm ihed in Acceptable Common Norr-s and Chcnacal Names for the IngreJuent Statement, ~r l'crnraic /.ubels. 'nd I:dition. I.nnronmental Protection Agency, Washington. 110. 202 5n, J une 19 7 2, as reyinted liy Subsection ifi2.7dio of the Regulations for the Enf orcement of the l'ederalinwcticide. l'ungiude, and Rodenticide Act. E PA Form 7550 -23 (7-731 ~,

DISCHARGE Sf 46 Al NUMBER l1 005-FOR AGENCY USE R 1 0 0 2 0 9 8 2 I f, Description of antake and Oessnarge For each of the can eeneters alsted De80w, enter en the appropriate Dos the value or code letter answer called for.(see anstructions) in andellon, enter tne parameter natee and code and all requered watoes for any of the following parametern if they were checked in tism.16; ammonta Cyansde, aluminum, arsen.c. beryttaum, cadmtum, theornium, copper, lead, mercury, n:Ch et, sesernum, amc, prienots, oil and grease, and chlor 6ne (resadual). f Innuent F.Muent t = = r c a g c 4 Parameter and Code 2 ~ E 5 ),. E )B$ >E3M [ h m k5 Sk b?Eht b]Eh b -5 5 Y EEI' !! j eE 5;[# ?. m }e 1 eta 5' 3 ; - 5 o [a 2 I 5 ';i i

lt T

!C %xa ?! 52 52 DR Cwa < ACwc w< z< m I (D (2) ' t3) (4) ($) (6) (7) (8) pow

t 1

Gahr.uwe day MCD L131.0175 xMW 50050 LL131.0175 L232.8976 g l pil Umis 8 6.8 8.5 00400 Temperature (winter) l f .39-l 115 115 115 7 028 Temperature (sammer)

r 66 l

115 115 138 74027 1 i Hoochemical On> gen Demand W OD 54ay) 1.24 1,24 0.51 2.25 mvt (H1310 Chemical Ox) gen Demand (COD) mg/l 1325 1325 971 >1750 00po Total Suspended (nonidterabic) I sobas 6.47 6.47 1.37 19.27 mgit 00510 / Speeine rundui:tance 4 7 4 micromhovem at 25' c 4.9x10 4.7x10' 5.0x10 00u95 - N Settleable Matter (residue) '"y' 4.27 4.27 4.27 13.57 00545 i

Ouier dawharges sharmg mt.Ae Ouw (serial numbers),(sec instructions)

' To be deternined '*** Values presented above were obtained from analysis of ambient seawater samples collect'ed on a monthly basis in the vicinity of the proposed intake location. Increases in the above values as a result of plant operation will conform to applicable guidelines, however 1 changes to ambient seawater concentrations resulting from plant operation vill be j insignificant. E PA rece nso.n (1.n> Il-6 ~ - -

FORM APPROVED . OMB No.i$s-Rol00 DISCHARGE SCpt AL NUMEER 005 rom AceNCv use R I CO 2 09 8 2 1 4 7, (Cont'd.) Innuent - Ernuent + x 3 s u y ?~ v EE-2 re u .2 C .2

=

3 -g j. y $3$ $g$# Parameter and Code 3 o E 77E [7g g .$ g }l $J7a ~3' 4. D$4 .j 4 ju ecj: aeca 8 ;, E a c e&Eg5 x 3 3 "a n,.1 1 4, 22: 7, o,E g 9 v. E, a E E a n c -oa _u a c XOwc< 2 Owc w< Z< Q-(D (2) d) (4) (5) (6)- (7) 18) No greau r Chlorine residual -.1.ree unknown than 0.2 f1) 0 0.5 (sco Item 26) Mg/L' Oil and Grease 415Mg/l 15Mg/l .q i At discharge conduit prior to mixing at entrance to intake pipe - To be determined Unknown but some' expected (1) Attempt to meet requirement may be modified - is. Piant Coni,ois Chec= if tne vos. sie lowing plant contfots are avaal4 Die in aCCordance with 40CFR 423.15(J) and 423.23(J)'. for this 015 charge, Af ternate powet Source for magot APS pumping f acility. Alarm or evnergency orocedure for GALM i power or equipment f ailure Complete item 19 ff cischarge is from cooling and/or $leam water generation and water treatenent additives are used. I 1,. Water Treatment Additives if the discharge is treated with Jnv Cork ditioner, Inhibitor, of algeC 6de, answer the following:

a. Name of Material (s) 216e Na0CL (sodium hypoclorite)

' ",'[,e*,"****""'**""' Not selected at this time c ai,, q ) -l l l

c. ' Quantity (Dounds added per 2,..

Unknown mets 6cn naisons or water treated), 1 EPA Fore 1550-23 (7 73) .i

'n DISCH ARGE SEstl At. NUMBER 005 POR ACENCY USE I R I C 0 2 0 5 8 2 Na0CL d. enem.cai winpos, tion as inese sted additives (see ins t ructions). ' Comptete tioms 20 25 68 tne e 11 a'inermal drunarge ' ] (e.g., associated witn a steen and/or power generation plant, steel rmit. petroleum refinery, or any other manuf acturene process) and the total descharge sow is 10 mitHon gallons per day or more. (see instructions) l

20. Thermal Descnarge Source Check 220 the appropriate tum(s) indicating the source of ina discnarge. (see 6nst ruc tions)

Boiler Blowdown dOLBO BoHer Chemical Cleanmg O BCCt. Asn Pond Overflow OAooF Doeier water Treatment - Evapora- @EPBO tar Blowdown oil or Coal rired Piants - Ef fiueni OoCFP from Air Pollut6on Control Devices Condense Cooting water $CoND Cooling Tower Olowdovvn OCTBo Manuf acturmg Process - O MFPR other CorsR 1

21. Discharge / Receiving Wa ter Temper.

ature Derference oeve the manitrnum lefHperature dif ference netween the discharge and receiving waterg int summer I and w,nier one, anne ennditions. l (see instructions) sumnser ante 49 oF. Temperature rise to be adjusted to result 76 o. in a discharge temperature maintained at r

winte, 2:iB 115*F for two hours. A total of six hours

22. oisenar,e rem,erature, Ra o' 38 is required for this operation.

' i Change Per Hour 23: oF./t our Give the maximum possielo rate of temperature Cnange per nour of discharge under operating con. ditions. (see instructions)

23. Water Temperature. Percerttele Report (F requency of Occurrence) in the table below. enter the temperature wnsen is car.eeded 10%

of the year. W of the year. Ir. of the year and not at all tmaatmum yearly temperaturel tsee instructions) Frequency of occurrence 10% W 1% Ma ximurn 67..% 68.7or 70.2cr 72.8 or inta e water temperaturi

222, a.

115 o

1150, 115orl138 o (See Note on II-9) i 'I (suoi.ct io naturai cnanges r

r

n. oncnarge water iemporaiure 22:n me. water intame veioc,ty 2:4 f estisee. varies between 18 fps and 4.9 fps depending 1

(see instruc tioni) on ambient water temperature i Dependent on number of cycles required to as. Reiention reme o.,eineiengen at 3:s minuiti ""r'ie S"eTlrEs'[. Uo'2.sc'n.stge reach 115*F, minimum of 34 minutes ie of coohng water, tsee enstructions) Determined from one year of record, Station' A, Bottom Location. Station A is located in the vicinity of the proposed intake locations, and is approximately 2800 feet from shore and 3300 feet west of the Charlestown Breachway. E P A Form 7550 23 (7.73) i

DISCllARGII #00 5 NEW ENGLAND POWER COMPANY NEP 1 and 2 SECTION II, ITEM 26, ADDITIONAL INFOP3tATION General Note on Section 11 The discharge (#005 ) discussed in this section is primarily of waste heat,demineralizer regenerant, and steam generator blowdown. Other constituents of the discharge may consist of small concentrations of radioactive effluents, cicaning fluids and small amounts of oil and grease. This flow is discharged through the Unit 1 intake structure to Block Island Sound of the Atlantic Ocean. At various times during the year, it is necessary to backflush the system (reverse the flow using the discharge as the intake and vice-versa) 1, in order to limit marine fouling on the intake tunnel. The backflushing process takes approximately six hours to achieve the necessary two hours of heating of the intake tunnel to remove marine fouling. lt The remaining time is consumed in reversing the flows and raising the water temperature in the intake pipe to approximately 11S*F. From April-November backflushing will probably be required every other week. During the remainder of the year, once a month should be sufficient. During the two hour heating of the intake pipe the following conditions are expected for the unit under backflushing. Duration Two hours 1,

Maximum 674,076 gpm Discharge Temperature-115*F It is important to point out that the backflush mode of station operation has been proposed in order to minimize the need for chlorine blocide treatment on a continuous basis. Otherwise chlorine concentrations far in excess of those provided above would be required for effective fouling control.
Flow rate during backflushing is dependent on ambient temperature, at highest l 1.

ambient temperature a flow rate of 674,076 gpm is required to maintain 115 F for two hours. When flow reversal occurs water which was previously heated by the station must be drawn back through the system. The maximum flow rate of 1 856,000 gpm associated with the maximum discharge temperature of 138 F will g o occur for a period of approximately 20 minutes on either side of. the heat treatment cycle. This maximum temperature of 138 F will occur when ambient water temperatures are above 65 F that is during July, August and September. During other months the maximum temperature will decrease an amount equal to the difference between 65 F and the existing ambient temperature. H l II-9

DISCHARGE 0005 2 NEW ENGLAND POWER COMPANY NEP:1 and 2 SECTION II, ITEM 26, ADDITIONAL INFORMATION Section II, Item 3,: Additional Information Engineering Report Available U.S. Nuclear Regulatory Commission Construction Permit Application submitted August 2, 1976, Docket'Nos. STN50-568 and STN50-569' Section II, Item 6, Additional Information Discharge Point t Discharge is through submerged velocity cap intake structures of approximately 26.0 feet in diameter. located approximately 30 feet below MLW. During normal operation the intake structures provide the. intake source for both units. Section II, Item 12, Additional Information Maximum Flow Rate Under constant power level operating ' conditions, subject only to variance in pump characteristics caused by tidal changes, maximum flo,w rates'are constant year round. During backflush operation the circulating flow rate is dependent on ambient temperature. Other flows such as the service water flow and the process water flows remain the same as normal operation. The total flow 1 at hiahest ambient water temcerature under backflush operation is approximately 674,076 gpm. I 1 r II-10 _,-...,-._,,,m- .~.

s C . t DISCilARGE" #005 -. ? NEh' ENGLAND POWER COMPANY 'j NEP'1 AND 2 I t SIITION 11, ITEM 26, ADDITIONAL / INFORMATION - t i Sectio d i Item 16, Additional _Informat, ion i Radioactive: Isotopes which may be present. in effluents are as follows: 1) Bromine 83,84,84

12) Niobium 95 2)

Iodine 130,131,132,133,134,135 13)' Molybdenum 99 + .3 ) Rubidium 86,88-

14) Ruthenium 103,106

4) Cesium 134,136,137

15) Rhodium 103m,106'

5) Chromium 51

16) Tellurium 125m,127m,129

6) ' Manganese 54 129m,131,132-71 fron 55,59

17) Barium 137m,140-8i Cobalt 58,60

18) Lanthanum 140 u)

Strontium 89,90,91

19) Cerium 141,143,144

.10) Yttrium 90,91,91m93

20) Praseodymium 143,144-lit. Zirconium 95

21) Neptunium 239

22) Tritium.3 Ion concentrations of' isotopes which are present in the discharge will comply with all applicable federal regulations.

Chlorine: Discharge from NEP 16 2 will conform to the chlorine effluent limitations specified in 40 CFR 423.15(J), Standards of Performance for.New Sources for Steam Electric Power Generating Point Source Category by the ll. S. Environmental Protection Agency. Consister with the provisions of 40 CFR 423.23(J) the applicant will attempt to conform to the following: concentrations of free available chlorine in waste water discharged from the NEP 16 2 cooling water system shall not exceed an average concentration of 0.2 mg/l and a maximum concentration' of .0.5 mg/l at the cutlet of a discharge conduit corresponding to an individual unit for a t otal of 2-hours a day maximum. No discharge of chlorine isial-lowed from one unit main condenser while the other unit main condenser is I is being chlorinated. Otherwise the applicant will demonstrate to the region-al administ rator that the units cannot operate at or below this level of chlorination. The water system is continuously. chlorinated for both units. !!awever, the applicant intends to demonstrate that it is necessary to main- ~ tain continuous chlorination of the service water system in order to assure proper func t ion'. of the system throughout the life of the plant as provided . by <10 CFR !.'3. 23 (.1) and 4 23.15 (J). 11-11 ,u, _...._.--,,-,~...a._..,

r ^ DISCHIRCE #005 i NEW ENGb ND POWER COMPANY NEP 1 & 2 Section 11,, Item 17, Additional Infor g yn Column 2: The flow rate for discharge #005 as listed in Item 17 is established from l the backflush flow rate as provided below: Highest ambient temperature condition backflush operation results in l flows of 856,000 gpm for a total of 220 minutes. This time tc allowed for I the flow direction to be reversed into the heat treating mode and then after heat treating, flow is again reversed to the normal flow direction. During heat treating and flow establishment a total of 140 minutes are needed. The circulating and service water flow rate can be no higher than l1 674,076 gpm. There fo re 7 1 356,000 gpm x 220 min 118. 832x 1 gal 674,076 gpm x 140 min L 9.437x 10 8"l 8 Total volume occurrence 3

2. 8 2 69< 10 ga The average flow rate threigh the intake pipe during this six hour period is Circulating & service 2.8269x 10 gal 785,250 gpm 360 min.

Systems discharge 178.8 gpm 785,428.8 gpm x 1440 = 1'. ;1.017 5 MGD*

Discharge at this flow rate occurs only for a maximum of six hours.

Note: The ground water used to produce demineralized water is the only intake source treated prior to use in the station. This treatment consists of filtaring, degasifying and dem.neralizing. II-12

. ~ + 4: DISCHARGE #005 NEW ENGLAND POWER COMPANY NEP 162 'SECTION II,' ITEM 26, ADDITIONAL INFORMATION l Section II, Item 22, Additional Information The maximum temperature change per hour as required by this item is largely due to the characteris tics of the backflush cycle. Mased on the average minimum temperature of 39'F provided for winter conditions for item 17. and the requirement to achieve an effective heat treating tem-Grature of 11S*F the maximum average winter temperature difference is 76*F. The note to item 22 provides for this change to occur within a two hour period which results in a maximum rate of change of 38'F/ hour. Section II. Item. 23, Additional 'Information ~,,, Based on temperature records from April 1974 to March 197S. r <.,

w. '4' Section II, Item 24, Additional Information The design intake velocity is.1.5 fps through the. intake structure for normal 1

eoperation. However, during backflush operations, the discharge multiport biffuser acts as the intake. During re. verse flow operations, the intake velocity ihto the dif fuser nozzles of the dif fuser will vary between 18 fps at switch over to a ' maximum heat treatment intake velocity of 14.06 fps in the summer or 4.9 fps in the winter. The. intake velocity during backflush is inversely pro'portional to the required temperature rise necessary to reach 1150F. 9 + '[ I 4 e b ? 5 4 s 4 4 11-13 ... ~. .... s. .... _ _ ~. _, _,.. _ _.}}

ML20197D085

Text

Dear Ms. Smith:

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