ML20077G867

Figure 2.5 - 10c,d,e to PSAR Re Geologic Profile 3,4 & 5

ML20077G867
Person / Time
Site:	Seabrook
Issue date:	06/07/1983
From:	PUBLIC SERVICE CO. OF NEW HAMPSHIRE
To:
Shared Package
ML20077G866	List: ML20077G867
References
FOIA-83-021 NUDOCS 8308090059
Download: ML20077G867 (32)

Text

.'

j

.f<

• .~- --

i 4

W.

I

,"C

• =

s e,,

^e,o

- 7 lI A IINV i

{

ll

-g l

's{'

• = u am I

8 t

g

(

/

/\\

F

\\

' ' ' * =,

~ '"

r6drock c

.. ise-t Ye nn NC

,g

)

'"""a"*

~

/

N

...a...

' \\ "<g, 0

3rdrock

+

.. nSS'

' '*J....[*.",E.T. "."."..U.5 O.".'*.*,.*eYs*!',En

.c. ou

=%

p

-c NC n<

ni

.h E-t'

~

l t'

'[

gre 3 u

)

r sv %

^

\\/'

+

..tw

" *.,, l"%

y::.: ?;c.~.c~=

c-r Bedrock y,4

..nw h

9 830607 D

SHOTWEL83-021 PDR PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE GEOLOGIC PROFILE 3, 4 AND 5 SEABROOK STATION Pre!!minary Safety Analysis Report FIG. 2.5-10c, d, e j

(-

.s _

s an en w att ser re o,.,

go,

r.,;,, j.c.co satee.

d**' '*7 J.

.A

.,e.v = or...n4

...= x.< se u re.u.

'~* *'t m l

a, a

~

w,,.

XA GEOLOGlC Prof lLE 3 Quartz Diorite Bedre sww sa a, or-n m.o r

or l,,,,, y,e g w e.

_ m s~

t

~

A k

N.y.

.^

,se..rie

...lea

. /V 1

r.

.., ~.

/

/

'***'8 swer %,'a ree.

GEoLOG1C PROFILE 4

/

Quartz Diorite Bedrock wee i ses.a.me.

c....cvs.. :: e, e a s = 6ec.uv ic==

e a eso.aca es asi

.g Ca.A 9.ht St ot. Ovt.LT* 6 Gk.Ct.k v.kk.

e.t. so t a$g To occa.fg 9

~

SW ad g a*

~

,,.., e

-f T,,

~

sh.

,5-o r,.

/

• J%.m,[J i

8 a.....cl ar

. aa m..= x.<rio u

.,.e.u.

/-\\

-ers n.

to.

GEOLOGIC PROFILE 5 Quartz Diorite Bedro:

4 m

JUNE 1974 AMENDMENT g

i.

uta.s sta LtvtL o*Tvu

's 10 0*

207 300' 400' 500*

600*

s L-i i

s t

~N s.s. N

'w%'s g

\\

l N

N.s.s.,,

/

I

/

s s

s_-.-_________.-.s s

s

's.~._..,,

1 s

s s

s s

s

\\

i

-~-s x

N y

s

\\

- 77

N p *"*'

N %,' N j,

g I

s. _ _ _

-er s.

s N

s:

x

/;

• p>= A" I,s. -

s4,N.... N,

\\

. 5 0

~ ~ ~- ~

i s

s_,

_- / p.

, m '4m.._

N *\\

y

-.a- -

w. ' *'.

-.,,s

_.. N Nh s

'.'.<.#)DN '\\ \\ ip-='/ 7-~5.,,N--<

7,

#i.., T

\\ t-u

'f.. - O.70

/'

q

- - ~.

n s

g G-l._**1.=*

f'

..)

3-T-

l s *g'%

'.. 'j) i

\\<

u

'~.

s.\\

4

. G '$ N *t,,'2.i % % %

' !, ----.;... 'S Q/ -

l s

..'.'..7,'>

~-

.(F

. " / " Pad

. f.,

I s

\\>

..x

'+a...

y(

/

\\

e 8-?

r

~ ~,,,,,,,

,,,, A * '

, {"/.y V l'1

,j

.t.

m.s

~

~'

Qyl_ ~&

q:'-

1v I ',.**#f~

l l

's

's

/

~.

' ' - C' -- -

p *"

.. g',LC' f

a l

.. s

.I

,** N _ _, n

.,..L,**

" ~ '"'

~

I

/

I o

m i.

-f

• p....

,f --Je,

_'\\. !

J8 l

o

.n

i

,.. t.o..

' t. i l'

l s__-

o-i _}- f /i./_'omi

=

i i

/ / /

s ESTIMATED TOPOGRAPHY OF THE PUBLIC SERVICE CCMPANY OF NEW HAMPSHIRE BEDROCK SURFACE SEABROOK STATION

c.

C

i. 2s S

s D

.cr..

l f

-~~ ~~$7-N ca --"-'

/

' ~'ML

./

/s m

= =-

'***==%,

l d'

\\

8 4 9, d i.

h/

,/,/

L

"* ' s N

- - - _ wl 80 /

4

/

4 s.',

p-~.9 g

/

g g

f

- ae

'~

U

• s x

N.:=:C m/ /.:.Ts e,

\\

J f n)

\\ '; ii s

's f--

/

s

\\

s

\\

\\p s

f

/

\\

N

/ / //

xx\\i, \\a.e./

//

\\

\\/ /

/

/

y Ny v,

e

'//

p

\\

\\

N-

/,- [/,(

• M s 7 t

r-x

//

/

/

\\~

_A i

s N

I

/

Z-' \\

\\,

o

.. wLL.

'.' VcQ.. ::..Ri \\ -o9-'*

' ' ' ' Q-N

- j-N s

x 1.c (_.1 h \\1g%

's,

y

. -r s -

'AT i s,

\\

'2-3

[.

I., '

/Id f

's I

t s

' ry,24 u-l (r

eT, A..ve i

t s

,?

j Y., 'Y 0

o J.-

-f x-,6

,,, f c,

'0I I N'-

i b

't'2 wN' I

k

\\

Ob e

e',

N

,,7

's _:.:. - Ai y p.g.

,gg g

---

W,q W> \\.\\, 3.:o. -~.....,,

y\\

,/

'b o

'\\,_.#~ h,e"N I-co" x

x. e-f

\\'

(' "g; 's J

~

~

(,

^

l

• N

}

h

[

s-ea4

'p_

~

't

[

' N o

s f

N N

\\

\\

e

\\

N

$/

\\

21,000 N s

g

\\

A s

\\

\\ 'J.

\\

\\

\\

I

\\

o' p '-

'N i s

N i

s N

.a si s

...I.

s

\\

s s

s s l-

\\

N N

J. a'4

%'s.o s

9 ** r

[.

I i

\\.

/

v

,7 Q./ %

/

20,000 N

^ * *N,

/

f.-

g-y O

/

O

/

g

/

O, k

i l

9 em.

l

\\

JUNE 1974 AMENDMENT 11 -

A A'

2 C 227 3

e N e see e

l

.c

-M~nsatow

- w,. w

~ m"~e:ph 12:s'h %.%3*i ?(:~i?.PfL'&

N.

q.N.3.q.??9N

% i;N.x.y. s.

~~W

a.,. s..;,-),.%-}Fm..N' ' Q<W..r... h.

4,.,

• ^

g,,,,,. N Newburyport Pluton

.,s.N.

.x. s... ~

-200*

GEOLOGIC CROSS-SECTION A-A'

.l

......4

.I

.4

.i

....?

.?.

.$g........*..............

..[~

/ i, l

N..'

f

, /,

Nq d -- %-.-

~

I S

N.................

.... p

~,Sg.

g/

g

'\\

uv

[\\

.k

\\,

\\

k

'g

=I

[}, ), /'

~

h.u

.r 1o.

\\'

I/

i

\\ 4&of

-' ' re-

~r s\\

I

,. m *,

3J.,__4 W.-

s

)

N, gd

..~/

r-

. ___ m

'V W\\/

y

^. / i [ 65

\\

i.

.\\

.\\

3 s.

1 s

-&.x-Ki ?

\\

Nqdn.'

~'~

I'. W'q,es h !. y s. pe] i~. . m' .y., 5,,,,..';. )..;- ? ' f**~ ,/ ~ ~ ~ l es p y 4, g --[ ._i ~ { - u,, . to \\ y-s Sk j,~ gi /h, -v-- I u '9g' / / 8 i i -/ i - o~ GEOLOGIC MAP PUBLIC SERVICE CCMPANY OF NEW HAMPSHIRE FOR THE AREA OF THE SEABROOK STATION STATION SITE

( [.4 .1 ...1 .*I. /...............~~W......... }.... p /. '. P . k,.....'.... g ......../........................ ,l,..... .i....................../ Q- . /. /. ....'. s k...... % '.' ~~- g.. .......pm.. J Ngd, %,,)..... l N m. j..... k N..... t i x...i., \\.

c......

3.;.... s-k I \\ o '/ t i i i / 5 l i !c Q et V x - r-W C_ U 3 -f oo-OI N Diabase Dikes (Interred) {YQd ,/ k- / .i i\\ ~ .:- J __ ~ ~ ' NEWBURYPORT Pt.UTOW / Ngd onei,,oid ouarta Diorit, l / I / KITTERY FORMATION ~ ,?. QuartzitIc Mica Schist -\\ r g' % y \\ ,~ Interred fortnational Contact ,/ l .,,fo Strike and Dip of foliation \\ \\.. ) $/ _V 4 Schistosity Dip and IWerred Strike .,,.go .loints: Strike and Dip t.e = Vertical 2 y ".'f ?'$.$.;"b \\ I,V 3L. J Plant Geologic Profile locations W

~'** Areas of Numerous Bedrock Outcrops s

/ page no goce s w,,,,,, y Nqd w i i w I o o O O ~. C, i o, ci to. c. p.

c c . t. /!' ~D.. %~, ,J .s.. .i.....i. .............l ... p /. '. ,,,,,. 18 ....i.....;.......... p e 'j ;-.. .l.....;.. ......./ g-71, .g..... T .......L.... .8 .3 w { Q i 4% %.....k W '/' l g%- ,,y ..g. / l +! i k i 's '00 h .,/ ~ p i l h / i a v i t N s. t A N '- i !, r, [i I I ~. m-u: / Olabase Dikes tinterred) / l .: L.. - T** /, - ' t--- .\\ ~ ~ ~ '/ NEWBURYPORT PLUTOV Nqd oneissoid ouarts otorite / / \\ KITTERY FORMAT 10.V j \\.. Quartzitic Mica Schist / ,f Interred formational Contaff l ,/; L .,ATo Strike and Dip of foliation o t 5 i e s 4 Schistosity: Dip and Interred Strikes _h c 4 .loints: Strike and Dip t **sVertical) y i 4 l'y l L' Plant Gulogic Proille locations e l l I e. .. ~,' * ' Areas of Numerous Bedrock Outcrops _ I [ \\ 10 7 o. 200' a w l inninni N m = l O 8 o O O, - ,d 0 r r=

~ - 3 j* g Juno 1973 ^ .e* LO' l y.** 0[2f(g(Ij / l

==* Y / f r* Mwe/ m/ ."h., us.. kbkg k ^ lfNNqd? f'?y g aj4 l 6 , ff e

}s

"? i l 9 R.n._% 6'Geghs- ./ 6b M~ .,,$i- 'j ' '; g - [ g O :; l),~: [ M / / aer> a s' 2 (3) _ .. s. m" 1 Atlant,e Ocean sea tevet . g. ^ v ?

• l00' lp I4.000.ss, 00 FT./ SEC.

s-yp se,000 = ss.000 rT./SEC. ggl vt aTICAL E X AGCER ATION 4I l Atlantse Ocean era trvet 70-I p w ,,--. f. -uw '~ 3,, j u;er l j }i I 3 so.c00-m.c00 rTyst. , rt> s j:. I4.c 0. s s.. j 3 'I vt vic t t:AcetaAfic x ,,3 3 BEOROCK GEOLOGY PUBLIC SERVICE COf.iPANY OF NE?/ HA'.tPSHIRE CIRCULATING ?. ATER SYSTEM SEABROOK STATION

C b; x- <il.sr I,I, ..e s ,$l 5 f--W l lk. ay j %Qd e gy ( ) \\ ,,H To \\ -), Tsbbing -*- )is;} B CH .zo 0 ri 5 -qnt $s't #. - D x - Tunnet \\ } \\ ~* &,.[ j,g} A jue../- A \\ '.) "VK Q -f* ~ =- 1 w,,,,,,,, p,7 :t, ...,ff l p/ r 3 .r..-- j 's. -* %.. "~~.x y,,,,, so,seno. u Q ...... :.-.~*' D.~ sT.,e JER SYSTEM % ....-~~ P o

1. 8r8'r

-4 % , /g ( 'APSHIRE comm*"* ' co oio or ratiation e, ' }fn*- - - - - * ' ~ ~ ~ ~ f j i .g ~ h', N t 4,. ,,,..'.'.....,} c '**Q ,g ino.o,o or.roints s 8 .. s.s - ~ ~ ~ ~ p.fm, ,/ b croen Leeses crrssoro s , /,' / li Nqd ? is .6,s Y p g @& + p ' x.- tecree s,its sor.nss l ~ 2)Ngd

• '??

L-se d l ,l /p Q 3C00' e /. w e / ~/ /* s' / 8 8 h _h F2 HA MPTCM BEACH ~ %sses point T-unconsaticated seits /

o?rusc:,

t - ~ -----................' _/' ~ ' ' - " ~ - - - - - " " L } su y sur us.oco vr.iste sk us. coo vriste sa r ~f 1 1 Discha rge Tunnel \\ 3 l HAMPTCH BEACH Mampton Harbor Unconsotidated seits s -- y .. coo rr sstC - - ~ -~...... - \\ -_..........................--.......,";,,,_/- ' - ~ - - - os. coo rr.ssec Intake Tunnel CCCPHY$1 CAL. RC$CARCH, INC.

( ~ ~ ( e w

• N IN N

a N Q,..sr { Q .e y a .,w = \\; -~. + .s?

1. [

Vqd? ~s. e

h pfa' g

E 'h 20 Sg nessine h *' (s,, ' .f,/ . to V ~. h -iQ a:~.? '.. WJ < - W' w; Nqd ?l) ) ~ p \\- f*: qd $ e s.t soi.e. '

• e; D*$.
• *l, s s'

l Interred formational Cantact

• l, Bedrock ledges Offshore Nqd ?.Y, tr fj Selected Bedrock Drillheles q

Selected Soils Barrage g ' p/. d* L. ,7z.f.l ggy Estimated Elevation ~ a the Bedrock s< tace c.- .1 s s b 0-1000' 2000' 3000-p pe' / 8 y

j. T L y,

r2 ; Robbks Point .b $ ~'" Unconsolidated Soils se.000-us,0colvts sic, t---~ -100' ; 3 ~ 3 Ngd f SA Ngd?

1. 3,000 rf./src 3

-2004 l g y -3 00' - '7: "a ~:

0. -

__w --2 Unconsolicated Soils .o E4.0CO-ts.000 rt/stC j \\ ,,.000 r,';tT-~~---- - - S -200'$ k -300'2 COMPILED BY JCHN R. RAND FOR WESTON GEOPHYSICAL. RCSCARCH. INC.

._ _ c-(' SB 1 & 2 Juna, 1973 j. Site Groundwater conditions ne groundwater table approximates the configuration of the sur-face topography and frequently occurs within 10 feet of the ground surface in the upper elevations at the site, and at or very close to ground surface at lower elevations. Some low elevation drill holes flowed groundwater over the collar of the holes. ,No major groundwater aquifers occur at the site. Groundwater is held in the bedrock in the narrow planar spaces between joint and foliation surfaces; the bedrock materials have low measured per-meability. Water levels in borings which were drilled along the edge of the tidal marsh enclosirig the site did not fluctuate mark-edly with daily tidal sea-level variations. Cross-reference Sub-section 2.4.13. k. Results of Geophysical Surveys ne purpose of the reconnaiss'ance seismic survey was to determine depths to bedrock and depths of major seismic overburden discon-tinuitics. .(1) Plant Site'Arca The plan of the seismic lines' of investigation in the plant site area is shown in Figure 2E-1 of Appendix 2E. In addition to the previously stated purpose, Line 20,000N was extended west to provide supplimentary data for the ground-water hydrology study. Other lines were extended north for the purpose of exploring the contact zone between the Newburyport quartz diorite in the site area and the Merrimack formation to the north of the site. The results of refraction surveys in the plant site area are shown on Figure 2E-2 (Sheets 1, 2 and 3) of Appendix 2E. In general, the seismic survey showed that hard rock was shallow in the vicinity of the selected plant location, with dense till along the north side of the site and less dense till and pos-sible other overburden materials vest of the plant location. l There is good correlation between seismic and boring data. l The bedrock velocities measured by surface refraction techniques ranged between 13,000 and 16,000 ft./sec.; this is indicative of sound bedrock conditions. Overburden materials can be tentatively identified by their re-spective seismic velocities. Velocities for the overburden =a-tarials ranged frem 2,000 ft./sec. for loose, unconsolidated overburden materials to 6,500 to 6,800 ft./sec. 'for dense gla-i cial till. In general, overburden naterials with velocities in excess of 5,500 ft./sec. and in excess of 3,000 ft./sec. for 2.5-27

C .....__( k h g 4

• I D

" I.h: fa_.Jcd/ Or- ) 4 '4i4 t A h

• l i

.t I s l , p r, uatAiF*s,p$] p ,L 1,g"# 7 3 n %g 9 )4., $k),EG,f ji jiI 4 k 4 OILI t T!g 1 l 8 '9[jr @' C 3 ' f Q ) i O! T @ '.Ul M^ i $M/ s T WQl6"p'Y*ylo k 7 b, yt; 3 i f

41 -

4 lO j g ,3 ^%e, .,d g a o ca p (( I i PUBLIC SERVICE COM?ANY OF NEW HAMPSHIRE WATER TABLE CONTOURS SEA 3 ROOK STATION g S O -.---rr-

.s O, ~ MARCH 9974 AMENDMENT 9 n I t.. .,..., m.~Mv:l;: s :r ygiv r. 9.~.:.y. ' .I x + -.. _ p p' g _ ua. ' l. v a.. ~... '..f..,.,Tr. V/ p,,.h,. _.a)c. /, :.,i n. 8. \\ .M.L d -t u.1... .y -......s.....,,' y a) w -c .g. aR. t q 1 I /- .r c,m* -%w....,.. ;.~ r' l'} p-W: ~. ~. - I . n.%. / .~....m...- 4 W$; T,,*,$ k. %sh ?! g.451:@.E.J! ..h. h'. k. -?.' h 'M h, kl k I 1Ed

1. ~ -'. ~@,-<s u

' n.$;. '"-J - 3,.,:. ' &....*/, e '. s :,. ~'."./**.:...= -;p:'. a'c v..

' ' *Q i.Q.: ~ ~,i.'.%... 7: '

t' . <....-.<,.....7 ;.'.-,M..,. -:< t. . -./ .. s :.v.r-.r-w- .y s,f;.a * "- e w g. ... ;l:' E. 4.-. . m.. ..M y, c.- k, 3 ::i. 3 c<~,.....:...n.. -w. n -~, ......a ..~.,.. sp; - e rd, ' '. ': -.,. 5 . d. '*~~% ;. e p- -r.s.m.@Q.W::,.p:w:.tSW..M.,c.ni.mM. a

• l.,

%..r \\ <- /

1..-\\x..

30m:.3. s%n%!..t-lt. .? D W -Q %,$ 6 '$., $.. 2.. i i-

s.W.t.

N w 4' . r . hb

s. '

N l [: t ~ j _s ?Y.*jh ;.*:5.':. Y!**. * '. *.~h*-Gf\\ (L. /\\ M.Y.s.? M f. M.g3 3,2.- ]l'***V** bY i, . 8 w@. y W. ( U p - M d.m 2 G-K %...Dk.,7 ).. t, .,. i a - w -- V~.W.>.: i. d ./ ?,MMy&q.* !- Q ql \\-(. W ;u d 8 5 %w... %: f k % . %w's,g., <s L N

s. W,.Cr 4* ,

• ' ~t

\\. ( =. .s 4 m;,7 w_ y u;,__ ( %.~..r.-g.1.as='ff,;wt.. %-*h m -s-n%, s e,., .w y O-i.- b ....\\rt \\f) f-s i 0 K f, .t - -...e .1 a / ,,, e'2 ' ~ - ~ n . s f .(., .ie,j:::'. C %f 1 .-/,.. : ~. p,;%.. .;t-f@Sig / mig}. .,.a .n .T.'~. 4]( d:.f..~.....:?' thvd m.. ~ m e/ L-- a , s-* ! - / / =#'20

• • = ? pV.M7-"? M M t'

~ 2

rA g

Q3 I i '2% ,y;: - . n -%L. \\.,, '...<v d f.:. i? w %e m. r ..;-a; nw 1

1m -p h [: r-l.

r g c smq.,. e_ r..? :.-/ '^ W q, s ghb n_A.s e-Q.t (. *~~.*..g- &. \\- s\\,' s i.,-- N ,. [h". t. ~en'3.9 3 . < = - ^; w N_ g.4 '7

5_...

>c s :-q u(

4 H -+ g .f? . y.f e' M-=* , AJ.*: 1' R.,s9. -8 E /

3,

l .. -, -WR O 0 E. t.,

. ;,,......-,,,..~.-

.y'../ s%.j.,,w 2 A i I j ,y. y .,fp.,. 1..,.. a..s... l 2 m p. ,,<. 0.Q l i 9,., p - - g. w 4,,. c ;.,p ~.. -t t f 'n. m," wg. p.T .: e m. r):T*.j/,, y( e. ;. i,- f ' ;'

= /

'.-rf M,M,' fr R. a 1 If l i n... 9.' %..#. M. %..,Q,AV. h::- N'. .s. /> .c 4 1' ~ T l u=.._.=.--- = ..s..e..... .s.a.. ss. s.s. ,,,,,* Te st sovmes ess se,s 1.savua es asase Low wa,se pgFgegutts uses ua. eves.es.n. 7.$',twasaama.s

• • =ss os viss is a.. son.aars, 8.3 essi asss os.e s.vecat =s st. =ess.

7.5' cono... ass uses me svaveoet east ma s s..s. 'as -8 8* 7.5' 06sesaasas viss saavaa, m.m. ass. 7.5' esates=66s O PUBUC SERVICE COMPANY OF NEW HAMPSHIRE SITE VICINITY MAP SEABROOK STATION Preliminary Safety An:!ysis Repcet FIG. 2.4-14

...... :.... m.... a_e. JUNE 1974 AMENDMENT 1 .I i l 1 .I 1 .I J i i. N. p .. N { O m l k (W (' A ) / M \\ [- kN. ) A -9., \\ j 1 r--Y \\ N ..... - ~ &j T---g .w. ./ y:..-.--- w =..... l ......,,m..~.. y s .=...g. p',:'2 ):;-% ['...~....: ~ if-..~ := ?.y'- r?. ;'::..: .. h' *. -..X.Ej o' '?..s; \\..-....... - .. p y,. e 'q '.l.: <>y. ;~~~. .-~ :: ~. - 1-- 's. -. y ~ ~.'\\.. 's. q..- :'... vqwn& :y ~~'g:- - ... -:e.. v; 1 %. e W.- {,,-l',,'I.pe.4,),,, '.n'.. ;g .::.e:::

• ,c.

s ~~b.kl. ':.hhfD '- h' \\,k g "~ T s m'/['. \\.}\\[(. l,. ( 2 M y h JJ- [- W(E. cab.,$r' "f-,(p%yQl'% . / ' 7, -l T.- J m 5^ s n;,. _- l -.o* v.m.%. w%- m. 4 ) 5 . ~, ~ s, yfl -. '%.x x 4' e l \\ l,ol h, ' .'h f .&0,, .h . 'Y n, '\\. 'w'W 5 x s.x s k p-A @l " ' Y r( m :-D'55~Ar):.C$- -$M, & r m -..::=.t. r...... -.. ~ ~ - , ;. g% ) _f... f. *. ,' ',,' s-Q- ~.. ~ ;>. g '~ ~, y. .-- ~,, / ~ /9- .I ' ,$' ~. \\ _ m %$ y $,.', p ~ ~. '~~

~ : s ':--

3. s %MJ i2-: :- g u w / i I ( 1 1 1 l I 1 5 3 3 5 5 5 5 5 5 f. 5 3 5 A h=.s . ~. t . - - ~ = ~ s- "~g~- s..... ~ ~ ~ oa \\ -4 T g =_* ~ " 9 -?r ~5r.d. Q %('n3 (,.w 5,,;, ~ .f

1. • • • d O'#

I g,., M it

C.% %r A.Le. % dW

~--. 6.--) PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE TOFOGRAPHIC MAP OF SITE SEABROOK STATION Preliminary Safety Analysis Report FIG. 2._4-1 , +. -

0 ,e e e .I 1 i l.h. .. am c.. q--- s L,. N ...j...... .e- -., 1 e** l e# //s m p g. L .V ? N / /%\\ / i sM r~

,' /

) \\v" ) f / ,i A T-~ 7 s F".___ ~ '-..- c'i. '.........s M ( /- .g:....

h. ' g l/

'W f ,(_ m.. ,r [,.,. ,g* %d y \\. s, a f.*, =* i p,o j;,/ -':... >=::.: A,r,%' \\ ~. ,I. i,,j Ni ',\\.~w;~.. - Q.~,, l;. l;lw,i'd'l',*p< l

1 s ~.

==- % ~.. '. '~.

/Ai

..y 4.AN

w-u -

% v ~. 's. G~ WW '~']%7'h'gb,',',[ '.M l (h'^j'$ l ~ '"A f f ~ x [C ~ ", / ( T b' Q WL d.Mil.N ? pc-I l . c Di.y \\ ';v N ' : l'/C i N\\'- 1_ [ k k/ s N '\\ ( / \\ ,.. ;W# j 1 'f- ) / ( 99., q ([p 3 '.'.k ~ L q A

k. w sc.::$h v

g s y .._ [ hk b b I l A x(,_ )> YD ( / R 1 n s s e a 3 n 3 h~ N ot.b J-n oe M m.= _ = - ~

• ::: a..'::.".ta %. '.".L*? *~~'..

\\ K a.- f t=*re cut t trs aes. \\

a. :::'t =2 ~<'- -

5P y ....., ~. - - ~ .. 5 5 1.__. l,- l a

Q 9 SB 1 & 2 TABLE 2.4-16 ~

SUMMARY

OF FIELD PERMEABILITY FOR GLACIAL AND BEDROCK MATERIALS IN THE SEABROOK AREA Number Permeability in Type of ,of gpd/sq. ft. Samples Range Mean Material _ 6 17 - 130 50 Outwash 2 0.3 - 0.6 0.4 Marine (silty phase) 21 0.3 - 25 5 Till 1 - 51* 4 9 Bedrock .*Large fracture, not used in Mcan Groundwater Hydrology for the Proposed Seabrook Nuclear Station, i

Reference:

by Weston Geophysical Research, Inc.,1969. j s 1 ~ 1 e J l O ,,-,---.-w. .,-----.,_.,,,,--n,,,,.,,,,,--g_,,- ,..n--- ,.,..w,--,, ,,,---.m-, ,-,,.-mw--,-.--._.., --.,c- ,,,n...

o SB 1 & 2 a Many places immediately underlain by till also serve as recharge j areas, but here the rate of recharge is comparatively small. Not only is the till less permeable than the outwash and the' ice-contact deposits, but it commonly forms hills whose slopes shed water rapidly. Furthermore, because till generally is thin, it may at some places become so fully saturated during prolonged periods of wet weather that potential recharge is rejected. The site is primarily underlain by well compacted till up to 62 feet thick and, therefore, it is not an irrportant recharge area (Ref.19). 2.4.13.3 Accident Effects There is no evidence to indicate that accidental liquid discharge at the reactor site could contaminate any existing well supplies in the area, since groundwater is moving toward neighboring tidewater bodies and away from popu-lation inland areas. Moreover, public supply wells are located in areas be-yond reasonable limits of groundwater. travel from the site area. Liquid waste discharge on the site could conceivably reach nearby tidewater bodies., How-ever, since groundwater is moving at less than 100 feet per year, such liquid wastes would be well diluted before discharging into the tidewater. Further-more, a part of such wastes would be absorbed on clay or silt particles in the till and marine deposits. It is unlikely that any wells will be located east of the site in the future, because the groundwater underlying the marsh is brackish. Also, the Seabrook municipal water system is well developed and serves nearly 100 percent of the town's residents. Any future users will be served by this system which draws its water from wells far to the. west of the site (Figure 2.4-20). These are Seabrook well numbers 1, 2, 4, 27 and 28 on Figure 2.4-20. The Hampton Beach area is served by the town ef Hanpton municipal water system, which draws water from wells far to the north of the site at locations, numbers 3 and 7, in the town of Hampton. The nearest public wells to the site in the town of Salisbury are far to the south at locations numbers 5, 6 and 7 on the same map. 2.4.13.4 Monitoring or Safeguard Reouirements The potential for groundwater contamination by the Seabrook Station is ex-l The plant design and safeguards systems make this an unlikely tremely low. occurrence. The natural movement of groundwater in the site area is away from the public l and private wells in the region. Moreover, the movement of groundwater in the site area is less than 100 feet per year, making all wells in the region l beyond the reasonable limit of groundwater travel from the site area. Liquid l waste discharge on the site could conceivably reach nearby tide water bodies. I l However, since groundwater is moving at less than 1/3 foot per day, such liquid wastes would be well diluted before discharging into the tide water. Furthermore, a part of such vastes would be absorbed on clay or silt particles in the till and marine deposits. 2.4-38

SB1&2 h b. Flow Directions and Cradients in southeastern New Hampshire, groundwater generally moves from the interstream areas, where much of the recharge takes place, toward nearby. streams or other bodies of surface water into which some of the groundwater is discharged. During warm weather, some groundwater also is discharged directly to the atmosphere by evaporation and transpiration in areas such as swamps or marshes where the water table is at or near the surface. Under the hydraulic gradients that exist in nature, the rate of groundwater movement is very slow. In the aquifers of the report area, groundwater moves at rates that range from a few inches per yehr to a few feet per day. Groundwater movement in the site area is toward adjoining tidal areas, and essentially normal to the water table contours shown on Figure 2.4-19. Local modifications in flow lines are the results of variations in permeability of water bearing materials and of topography. Rates of groundwater movement at the site do not ex-ceed 100 feet per year (Ref.19). This is based on a water table gradient of 0,.06 feet per foot, as observed during high watDble ' conditions, and an average' permeability of 5 and 4 Meinzer units (gallons per day per square foot at prevailing groundwater tempera-tures) for the till and bedrock, respectively. The low permeability of the till and bedrock is substantiated by the lack or relatively Y small response in water levels to tidal fluctuations, as observed i J in several borings located along the edge of the tidal marshes. i Table 2,4-16 lists the range and mean values of field permeabilities of glacial and bedrock materials. These were determined by falling head and packer tests made in the test borings on the site area. The listed values for the outwash material are representative for t l, the finer sands more comonly found to the west of the site, whereas, the coarser outwash and beach sands to the east (Figure 2.4-17) ap-pear to be much more permeable, and values of 1,000 gpd per square foot or more are probably not uncommon. l Recharge area within the Influence of the Site c. Under natural conditions, nearly all recharge to aquifers in south-eastern New Hampshire is accomplished by the infiltration of preci-pitation within the area. The principal recharge areas are the places in=lediately underlain by ice-contact deposits and by outwash and shore deposits. These deposits are sufficiently permeable to l absorb water readily. They comonly form terraces and plains whose flat surfaces retard surface runoff and, thereby, afford ample oppor-tunity for infiltratica. They, generally, also provide sufficient storage space to acconnodate the additional water. 2.4-37

_l j (. h'. r SB 1 & 2 j (4) Town of Salisbury, Massachusetts Water Supply System The town of Salisbury at preacnt is served by the privately owned Salisbury Water S,upt..y Company which draws its supply from 5 wells in the northwestern corner of Salisbury (Fig-ure 2.4-20). The five wells draw from 400 gpm to 700 gpm to supply the towns residential and industrial users. A 200,000 gallon elevated storage tank is also in use. (5) Projected Future Use The ' demand for water in this region is expected to grow at an accelerating rate over the projection period (1980-2020). This increase in water can be attributed to the shif ting indus-trial trends and increasing suburbanization of New Hampshire. More supply wells and inter-municipal distribution systems are anticipated to satisfy the region's increased demand for water. Table 2.4-15 presents the water use projections through the year 2020 for towns in Rockingham county and Salisbury, Massa-chusetts, thru 1990, It is expected, that both surface and groundwater sources will be developed to provide the required supply. Specific data for~ the town of Seabrook are included in Table 2.4-16. (6) Groundwater Levels The pattern of water-level fluctuations in the region is ir-regular, reflecting variations in precipitation and tempera-ture. This is illustrated in Figure 2.4-22 which correlates the hydrographs of selected wells in southeastern New Hampshire with monthly precipitation records (Ref. 26). The water table in the site area is mostly in till or bedrock at depths no greater than 17 feet, and usually less than 10 feet below the ground surface. In the outwash deposits west of the site (Figure 2.4-17), it occurs mostly within 5 feet of the sur-face. Some partially confined groundwater is found at depth in bedrock fractures. Evidence of this found along the edge of tidal marshes where fresh groundwater with a chloride content ranging from 38 to 144 ppm was encountered in bedrock borings under sufficient hydrostatic head to cause flowing conditions (Ref. 19). I e J 2.4-36

SB 1 & 2 Scabrook, are supplied by the town's muntcipal water system (Re f. 19). The Salisbury Water Company uses five wells to supply water to most homes and industries in Salisbury, Massachusetts. Other wells supplying mostly domestic and farm needs are scat-tered throughout the area, including the towns of Hampton Falls and Kensington, which are both without public water supply sys-In the site vicinity a few private wells supply homes. tems. All of thase are less than 15 feet deep, and tap the shallow outwash deposits to the west and southwest of the site area .(Ref. 19). (2) Tabulation of Existing Users Figure 2.4'-20 shows the location of all known active wells in the region (Ref. 23). Data for each of these wells and for many test borings is presented in Table 2.4-12 and Table 2.4-13. The information provided in these tabulations includes names of

• owners, location, year completed, depth, diameter, type, geo-logic characteristics, water level and type of use.

(3) Town of Scabrook Municipal Water System The town of Seabrook is served by its own municipal water works system, whose source is groundwater wells. The basic system, first put into use in 1956 with two wells, now consists of five active high yield groundwater wells, each with a pump and pump house. Present storage capacity is provided by a 720,000 gallon storage standpipe, with a 1,000,000 gallon tank sched-uled for construction in the next few years. The system, with approximately twenty miles of 6, 8,10 and 12-inch diameter distribution pipe, is outstanding in size and service in comparison to the small population of the town and to the water systems of adjacent towns. The quality of the groundwater drawn in Seabrook is of good quality, as it generally is throughout the whole southeastern New Hampshire region (Table 2.4-14). The water consumption rate in Seabrook has been steadily increas-ing over the past decade. Figure 2.4-21 plots this annual trend which now shows an average increase of about 70,000,000 gallons per year (Ref. 7, 8). 2.4-35

1 .. h SB 1 & 2 ) West of the site, thin outwash deposits overlie either till or marine silts and clays. To the east, toward Hampton Beach, medium to fine sands, 50 feet or more in thickness, occur just below ground i Icvel or recent marsh deposits (Figure 2.4-18). The sands, which appear permeable., are essentially saturated with salt water. They probably are outwash or older shore deposits with beach sands over-lying them in the Hampton Beach area. In the site area, the water tab 1_e is found at depths no greater than_, and generally less than 10 feet. West of the site area in 17 feet, Mtwash material it' 'is usually within 5 feet of the ground i the sandy surface. Predominant groundwater movement is toward the tidal areas, however, local flow lines are modified by variations in permeability of water bearing materials and by topography. A plot of available water table levels in the plant area is shown on Figure 2.4-19. Rate of groundwater movement is expected to range from a few feet to several tens of feet per year. Based on available information, the average permeability of both the till and bedrock is less than 10 gpd per ft2 (gallons per day per square foot). Permeability of the marine 2 deposits is less than 1 gpd per ft, Utilization of Groundwater by the Plant c. Groundwater used by the plant will be supplied by the town of Sea-brook. The present Seabrook water supply system is supplied by ( 5 wells (Figure 2.4-20). A sixth well will be added to supply the l plant's needs, which are not expected to exceed 350 gpm during start-up and considerably less during normal operation. Presently, no wells are planned for the site. The groundwater will be utilized in the plant makeup water system which will have a makeup wateY storage tank. It will also be used for fire protection. 2.4.13.2 Sources a. Groundwater Use (1) Present Regional Use Most water supplied in the area are dependent on groundwater Public supplies in the towns of Seabrook and Salis-sources. bury are taken from wells which tap aquifers in ice contact deposits. These wells yield from about 300 to 700 gpm, and range from 22 to 54 feet deep (Ref.19). The town of Seabrook at the present uses five wells for its public. water supply, and all of these are located at least two niles from the site. Most homes, as well as co=ercial and industrial users in 2.4-34

('s; b-i SB 1 & 2 Changes in groundwater stornge are reficcted by fluctuatinns in ) groundwater levels; these leycis rise when recharge exceeds dischnrge and decline when discharge exceeds recharge. In general, the greater the permeability of a deposit, theIn till, for e sms11er the water-level fluctuations. fluctuations ranging from 10 to 20 feet are not unusual, During especially in wells located on hills or slopes. periods of recharge, the low permeability of However, during peri-and the water level rises considerably. d ods of little recharge, the groundwater continues to drain an In con-discharge slowly; thus, the water level declines. fluct These deposits are sufficiently per-

trast, ice-contact deposits.

i meable to transmit groundwater laterally at rates approximat ng ily do those of recharge, and large rises in water levels ordinar not occur (Ref. 22). Local Aquifers Formations, Sources, and Sinks _ b. Locally, the No major aquifers underlie the site or its vicinity. h are wide-most productive aquifers are in the outvash deposits whic ly distributed just west and southwest of the site (Figure 2 The outwash, however, is made up mostly of predominantly fine s In the site area, it is up to 35 feet sand of low permeability. thick and, generally, overlies marine sediments. Local occurrences of coarser grained glacial and/or recent depos h t are evident both to the northwest and under the tidal ma These deposits, however, contain of the site (Figure 2.4-18). either brackish or salty water, or would be subject to salt water intrusion under pumping condit,1,ons because of their proximity to salt water bodies. i On the site property, bedrock occurs at or near the surface, beco deeper under the tidal marshes to the south and north where On the site, the bedrock much as 70 feet or note below sea level. forms an irregularly buried ridge trending in an appro easterly direction. A sequence of marine and recent compacted, till up to 62 feet thick. h of the marsh deposits normally rests on the till along o areas to the, south (Figure 2,4-17). g 2.4-33

SB1&2 { { t

• a t

t. They commonly form terraces and plains whose flat surfaces re-tard surface runoff, and thereby afford ample storage space to t accomodate the additional water (Ref. 22). \\ l Many places imediately underlain by till also serve as re-charge areas, but here the rate of recharge is comparatively small. Not only is the till less permeable than the outwash i an'd the ice-contact deposits, but it commonly forms hills I whose slopes shed water rapidly. Recharge occurs intermittently, and usually follows a seasonal I pattern. During the growing season, mest of the precipitation S l that enters the soi1~is retained there to satisfy soil-moisture /: requirements, and recharge therefore is small. During the rest ./) of the year when plants are dormant, the soil-moisture re-quirement usually is small, and recharge is great whenever there [ is much rain or snowmelt. The peak usually accompanies snow-melt during the spring season. 3 i Groundwater is discharged naturally through springs by seepage to streams and other bodies of surface water, and by evapetrans-piration. It is discharged artifically through wells and arcti-s: I ficial drains. Discharge to streams, called groundwater runoff, i- ~ usually is greatest soon after periods of dry weather and sus- ? i~ tains the flow of the streams when there is little or no surface runoff. Discharge by evapotranspiration is greatest during the 77 growing season. i, ', Under natural conditions, the principal discharge areas in the l, j Seacoast Region are stream channels, the sva=ps, and the coast- 's. l line. The water table normally slopes toward the streams, and groundwater enters them wherever they flow on permeable materi-al. Groundwater is discharged in swamps' and other lov areas by vepage whenever the water table is high enough to intersect the lod surface, and by evaporation and transpiration at times 'e i when the water table is only a short distance below the land surface. Along the coastline, some of the grouadwater evapor-l,i l., ates and some of it seeps directly into the oceca. Changes in groundwater storage take place as a result of I changes in the ratio between recharge and discharge. In general, periods when recharge is greater than natural dis-charge occur in late fall, vinter, and early spring while evapotranspiration is ineffective. During late spring, summer, and early fall, however, when most of the rainfall that infil-trates into the soil is evaporated or transpired by plants and does not reach the zone of saturation, recharge and natural discharge continue, though at a reduced rate, and the amount of l. groundwater in storage declines. O 2.4-32 .j t

e ( SB 1 & 2

.r

~,.4 t i few gpm to a well in this area (Ref. 20). Beach areas is limited by a thin freshwate rook only a few feet thick, which is floating on saline wat, in 4 originates in the beach areas. charge.to the lens er. Re- -l c. sidered an'important source of water for the region h. {Q 'I Impermeable marine deposits largely consisting of silt E, are videly distributed in the ares. and clay [ well supplies but locally confine groundwater in ice c deposits, till or bedrock (Ref.19). i 4 c { .~ ?. Bed ich underlies the unconsolidated materia (( Msed the Newburyport quartz diorite and the metamorp feJiments of tee Merrimack g'roTThere is no apparent 1 l osed .!F of rock and they are not an important wat i L. ypes rock wells yield less than 10 gpm from depths up to 30 Most bed-(Ref. 21). i;. { Swamp deposits almost wholly occupy the tidal marshes a tain brackish or salty water. and are not sources of well supplies.These deposits are impermea con-y s,$. (2) Sources and Sinks The groundwater body in the area occurs under water tabl i ditions, except in some places where it is confined by m j e con-sedirents. cipitation which in the region averages ab arine I' i The infiltration capacities of soils in the area var year. I. groundwater recharge is greatly retarded. consid s. y I ,. 4 The regional water table approximates the configuration topography, and frequently occurs within 10 feet of th j of the surface. where streams intersect the water table and e ground strears are tributary to tidewater. recharge to discharge generally do not ex I (Ref. 19). \\l Recharge to aquifers in the region is accomplished by th filtration of precipitation. e in-Figure 2.4-17) are the principal recharge s (see posits are sufficiently permeable to absorb water readily These de-O 2.4-31

.i (, { SB 1 & 2 ) 1 Hean annual precipitation is about 43 in. and annual loss to evaporation from 1 water bodies is approximately 25 inches. Seepage into the groundwater body is extremely varinble owina, to the variations in the permeability of the surricial j deposits. The hydrologic bo atdaries of the site are Hampton Harbor, the local drainage ~ l. courses and impervious subsurface materials. I 2.4.13.1 Description and On-Site Use Regional Aquifers, Formations, Sources and Sinks a. l The study area comprises the drainage basins of Hampton River, Browns River, Blackwater River and Hampton Harbor. It includes l the towns of Hampton, Hampton Falls, Kensington and Seabrook in y New Hampshire and Salisbury, Massachusetts. Throughout the area, groundwater is found in the bedrock and in overlying glacial and recent deposits. The seaward limit of the fresh groundwater body does not extend greatly beyond the tidewater margins of Hampton Harbor. Infiltration of precipitation is retarded in places by the impermeable marine sediments which overlie much of the area. i The shallow unconsolidated surficial deposits overlying bedrock are the principal aquifers in the area. These are composed of beach deposits, swamp deposits and glacial drift. The latter includes: till, ice contact, marine and outuash deposits. Ground-water in the underlying bedrock is limited to fractures which O-- become less frequent at increasing depths. The effective depth for - fractures to transmit water is about 300 feet. (1) Aquifers and Formations j The largest quantities of groundwater are obtained from course-grained sediments in the ice contact deposits which consist primarily of stratified sand and gravel. These are the coarsest in texture of all the local deposits and average about 50 feet in thickness. As shown in Figure 2.4-17, their areal o extent is small, except in the vicinity of Hampton and Salis-f bury. These deposits are a source of public water supply for the towns of Seabrook, Salisbury and Hampton. Lesser amounts of groundwater, adequate for meeting the needs of homes, farms and small industries are available from the l .I outwash deposits. Well yields from them generally do not ex-ceed 100 gpm (Ref.19). In the study area, the outwash is mostly made up of fine sand, co=monly less than 25 feet thick, and is a source for small domestic supplies. l Some smn11 wells are also developed in the till and in beach ll-sands. The till which is an assorted mixture of rock parti-l- cles in a matrix of clay and silt, generally yields only a l ~ O 2.4-30

( ) SB1&2 Jun3 1973 2.4.13 Croundwater_ The Seabrook Station is located in what is termed by Meizner (Ref.18) as the Northeastern Drif t Province. Principal ground. tater supplies in the area come from glacial drift. The average annual temperature in the area it. 50 F. -C E '. - l '\\ . i'.t

f...

,.;g

<;f. 4;.m a .(... ' < .h.. 7 .f 1 .,. f.

s..

'm .. ~ nes- ^ 4. $x 4... s@

-x.

.s. h- .-g- . e,: .j(k* 1

.p..

E,'r ' c ~... 3, J-2,4-29A w: . ~. ~. ^#*k I _ ~

(:' CE~ a i intet which extends The tilackwater River terminates in a 4-mile long tidal 1 In two miles southward f rom llampton liarbor to the Massachuse: ts state I ine. into the run-addition, tirowns River, Ilunts Isinnd Creek and Mill Creek flow is Although there is a discernible watershed, it fluence from the west. f resh water runoff is not particularly significant. small and the attendant Thus, the several streams and their branches primarily serve a tidal stream i directing the semidiurnal inward and outward flow of saline water. Estimates of the areal extent of the salt marsh and Hampton harbor are found The variance in the estimation is high, probably re-flecting the dif ference in interpretation of what constitutes marshland and in several sources. Whether or not planimetry was used on Geological Survey maps, Coast and Geodetic Survey charts or aerial photographs may also cause differences harbor. in values of areal extent. The New England River Basins Commission (1971) estimates the total acreage o marsh and open water as 5700 acres of which some 4990 acres are tidal marshes They state further that there are several hundred acres of intertidal flats [. fringing the mouths of the tidal streams and the harbor. Normandeau Associates, Inc. (1971) estimates the tidal marsh area to be hi-approximately 3800 acres as obtained f rom planimetry of a U.S.C.S. Topograp cal map. The Corps of Engineers (1972) estimates the tidal marsh to be about 8 square r miles (5120 acres) in extent. O.,. The New England - New York Interagency Committee (1955) estimates the open water harbor area at high tide to be 300 acres in extent. (1964) estimates the salt marsh The New Hampshire Fish and Game Department 3085 to be 2784 acres in extent, although a check of their figures indicates p acres of tidal marsh and 23 acres of-dunes and flats. l Finally, Ebasco Services, Inc. (1969) estimates the water surface area in (550.9 acres). the estuary arms at mean low water to be 24 million square feet This result was arrived at by planimetry of aerial photographs. The plant site is located between the Browns River and Hunts Island Cree both of which are less than 3 river miles long.cuntributed to b F I surf ace runoff. l Tables 2.4-12 and 2.4-13 include data on wells in the a ic owners. Figure 2.4-2 is have no adverse ef fect upon the water supply in the area. a topographical map depicting the major hydrological features of the regio f go l O 2.4-3 i

(' SB 1 & 2 Jun2 1973 O Piscataqua River) and the southern end of Seabrook Beach at the Massachusetts state line,16 miles to the south. It is with the Seabrook area, particularly Hampton Harbor, that this report is primarily concerned. Geographically, Hampton Harbor is located about 13 miles south of Portsmouth Harbor, 8 miles south of Rye Harbor,1.5 miles north of the Massachusetts state line and 5 miles north of Newburyport Harbor, at the mouth of the Merrimack River. Hampton Harbor itself is a shallow' lagoon of about 596.8 acres behind two Hampton Beach to the north of the harbor entrance, and barrier beaches: The harbor is roughly Seabrook Beach to the south of the harbor entrance.It is situated at the confluence o 1.2 miles wide by 1.5 miles long. These are shallow tidal streams emptying into Hampton Harbor from rivers. the Blackwater River, Hampton Falls River and Taylor River drainage basins. The mean tidal range of Hampton Harbor itself is about 8.6 feet, varying from 4 feet below to 4.5 feet above MSL. Since the harbor is very shallow, only 5-6 feet of water remains in the deeper channels at icw tide and only 2-3 The volume in the intertidal zone or feet of water covers most of the area. the tidal prism of Hampton Harbor is 224 million cubic feet. k'ichin the entire Hampton Harbor. estuary, the volume in the tidal prism The caximum (between MLW and MHW) is approximately 470 million cubic feet. average tidal velocity through the harbor entrance is about 1.7 fps. c New water is added to and old water is lost from the Hampton estuary at an Expressed on a percentage basis, about 88 per-3 average rate of 9850 f t /sec. cent of the estuary volume leaves and returns on each ebb and flood tide cycle. At ebb slack tide the estuarine residual is approximately 12 percent that of the total volume of the basin. These figures indicate, then that the Hampton Harbor estuary exhibits a substantial tidal exchange rate under natural con-ditions. I The Hampton River is tidal for two miles to..the northwestward, where it is fed largely by the Taylor and Hampton Falls Rivers. The Taylor River has a This river has total length of 10 miles and a total fall of only 75 feet. a safe yield of between 1 and 10 million gallons per day within a length of 1 mile above the Hampton Falls River. The Hampton Falls River has a total The lower of length of nearly 7 miles and a total fall of nearly 120 feet. two series of small falls has been developed by three small dass near the village of Hampton Falls, about two miles upstream from the mouth of the The impounded water bodies, Dodge Ponds, have a total surface area rive r. of roughly 20 acres. A third tributary of the Hamnton River is the 8-mile long Tide Mill Creek which drains the south-central part of North Hampton and the eastern part of Hampton. It flows southward through extensive marshes into the Hampton River about one mile north of Hampton Harbor. 2.4-2 1

~ [ h SB 1 & 2 Juns 1974 Amendment 17 2.4 HYDROLOGIC ENGINEERING 2.4.1 Hydrologic Description 2.4'.1.1 Site and Facilities Seabrook Station site is located in the northern part of Seabrook, New Hamp-shire, approximately one mile from the western shore of Hampton Harbor. Hampton Harbor is situated at the confluence of Hampton River, Browns River and Blackwater River, and is located on the coast of New Hampshire, about 1.5 miles north of the Massachusetts state line and 13 miles south of Ports-mouth Harbor. The towns of Hampton, Hampt.on Falls, and Seabrook abut Hamp-ton Harbor on the north, vest, and south respectively. The villages of Hampton Beach, north of the harbor entrance, and Seabrook Beach, south of the entrance, border the navigable waters of the harbor. The entrance to Hampton Harbor is crossed by highway Route 1A. New Hampshire h7 Route 286 crosses the Blackwater River about 2 miles south of the harbor entrance on a fixed bridge, and the Boston and Maine Railroad crosses Mill Creek, Browns River, and Hampton Falls River about 2 miles west of the har-bor entrance on small bridges. The rivers are navigable up to these bridges. The station site is situated on a point of land the terminus of which is called "The Rocks", located between the Browns River and Hunts Island Creek. Figure 2.4-1 is a topographic map of the site. Adjoining the site is a broad, flat marsh zone in th~e north, east and south. ident,ified;as..Hamp_ ton Flats, wft1 an elevation of approximately'+4 feet NSL. ~ ~ The above mentioned tidal estuaries will accept the surface drainage of the plant site. There are no projected changes to the natural drainage features of the area surrounding the site. The station structures are located at finished grade elevation of +20 feet MSL. Some of the existing ground elevations of the site beyond the plant limits and bordering on the salt marsh are'below this elevation and could be exposed to flooding from wave runup produced by the hypothetical storm surge. These lower locations of the plant site adjoining the salt marsh (northeast, east, southeast and south sides) are protected by a riprap

• l revetment or a seawall at the edges of the embankment.

Figure 2.5-11 shows the arrangement of the plant site, the protective revetment and sea walls. /7' 2.4.1.2 Hydrosphere i The New Hampshire Coastal Area is a 47,000 acre, triangular-shaped drainage j basin at the eastern end of Rockingham County in the extreme southeastern corner of New Hampshire. It includes all of the drainage entering the Atlantic Ocean between Odiornes Point in Rye (the south entrance point to the i 2.4-1 ~ _ _. ~_ _. _ _ _ _ _. _,

~ c gp a od0cmL t b b S),b o O g. e

.,44vdgr@sEu4 ~;^ G peb qi Q cheg 1 san s p k e D3f0Lb:=NfdoutggihCpd1 iottk& 1 Asspra 4.ws *, .$GC Mr A r kkwpkH chair so& L' W $ ,,,e ,s' O. l $'H ^ + 7 d,e, ,p / cy,ph F ( ~\\ i y %fp% e.c l )*g e 9 -. - - ~ - -,... -, _... -

9 THE COMMONWEALTH OF M ASSACHUSETTS a

h. b5 DEPARTMENT OF THE ATTORNEY GENERAL

~, [9 .J O H N W. M c C O R M A C K S TAT E O F FI C E B ull.D I N G g/ D N E A S H B U RTO N P t.A C E. B O STQ N 02108 CANCIS X. SELLDTTl November 8, 1982 arro=~=v==~==a' CERTIFIED MAIL Director, Office of Administration Freedom of Information and Privacy Department U.S. Nuclear Regulatory Commission Washington, DC 20555 Re: Freedom of Information Act Request

Dear Sir:

Pursuant to the Freedom of Information Act, 5 U.S.C.

S552, as amended, and 10 CFR'Part 9, the Attorney General of the Commonwealth of Massachusetts requests the following documents concerning the release of radiation from the Pilgrim Nuclear Power Station in Plymouth, Massachusetts.

As used herein, the term " documents" refers to the original and copy (but not both if identical in every respect) of any printed, written, recorded, transcribed, punched, taped, filmed, photographed or graphic matter in the possession of or subject to the control of the NRC or any Commissioner, employee, agent or attorney thereof, whether sent or received or neither, whether a draft or otherwise, how-ever produced or reproduced, and both sides thereof, including but not limited to, any memorandum, correspondence, letter, affidavit, court paper, transcript, diary, report, study, tele-gram, table, telex message, record, chart, paper, work paper, graph, index, book, notebook, pamphlet, periodical, tape, data sheet, data processing card, note, notation, minute desk calen-dar, appointment book, sound recording, computer print-out or microfilm. DOCUMENTS REQUESTED 1. All documents which relate in any way to the routine, planned, or accidental release of radiation from the Pilgrim Nuclear Power Station since startup, including all documente containing information as to the amount or type of radionu-clides released on particular occasions, or dates of release. 4 go". u 9

• e,-

g.

• .f Director, Office of Administration Freedom of Information and Privacy j

Department U.S... Nuclear Regulatory Commission Page Two T 2. All documents which describe the manner in which Boston Edison Company or. government officials have monitored radiation releases from Pilgrim Station since its startup, including all documents describing the number, type and/or location of radiation monitoring equipment used by BECo or by any such officials.. 3. All documents which describe the methodology or results of environmental sampling or analysis performed by BECo or hy-federal officials since the startup of Pilgrim I to asse'ss the effects on the environment of radiation releases from the plant. 4. All documents relating in any way to the release of spent resins from Pilgrim Station which was discovered by BEco on or about June 11, 1982,. including all documents which discuss the date or approximate date of the release, j of the release or of BECo's failure to discover .the cause[s] the release until June 11, 1982, the type and amount of radionuclides released, and all steps which have been or will ( be taken to prevent further releases of spent resins from the Pilgrim Plant.. In our opinion, it is appropriate in this case for the - NCR to waive copying charges, pursuant to 5 U.S.C. 5552(a) (4) (A) and 10 CFR S9.14a "because furnishing the information can be considered as primarily. benefiting the general public" and this office is_ a state agency to whom furnishing the j records without charge is an " appropriate courtesy." \\ We understand that, under the Freedom of Information Act, l l you must respond to this request within ten (10) working days and that your failure to respond within that period of time is . ~. considered to be a denial of the request. Thank you for your ( prompt consideration. Very truly yours, C._ l l n Shotwell [ i Assistant Attorney General Environmental Protection Division Public Protection Bureau Tel: (617) 727-2265 JAS:jmc

' *h THE COMMONWEALTH OF MASSACHUSETTS i. f{ [ff' DEPARTMENT OF THE ATTORNEY GENERAL f JOHN W. Mc CDRMACK BTATE OFFICE BUILDING ~ ' J DNE AsHsuRTON PLACE. 50STON 02105 FTANCIS X. B ELLOM1 ATTonwry o r N rm aa. January 5, 1983 FREEDOM OF INFORMATION ACT REQUEST J.M. Felton, Director k~hk-Division of Rules and Records 0 c l-10-9J(, . Office of, Administration Nuclear' Regulatory Commission Washington, D.C. 20555 Re: FOIA 82-557

Dear Mr. Felton:

We are in receipt of your response to our FOIA request of November 5, 1982. It appears, however, that certain documents responsive to that request have not been supplied. In respo.~e to an earlier FOIA request seeking documents related to the Pilgrim Nuclear Power Station in Plymouth, Massachusetts, your office forwarded to us a document entitled " Table D.l. Mean Number of Early Fatalities, Early Injuries and Latent Cancer Fatalities for 91 Sites, Condi-tional on SST 1, SST 2, or SST 3" and'the computer printouts and other documents underlying that study which related to the Pilgrim site. Such underlying documentation for the Seabrook site is covered by paragraph (1) of our FOIA request and should be forwarded immediately. Also supplied in response to our Pilgrim request were dccuments related to the liquid pathway situation at that site . ~. which, along with similar studies for all other sites and pro-posed sites in the country, formed the basis for NUREG/CR-1596: - The Consequences from Liquid Pathways After a Reactor Melt-down Accident." Again, such underlying documentation for the Seabrook site is responsive to our request (paragraph (11)) and we would ask that it be sent to us at the earliest possiole date. On another matter, we have received no response to our FOIA request dated November 8, 1982. I enclose a copy of that request for your convenience. ,, 5$ - f} WQl p

-r iW'. 4 . We ask that you give these matters your immediate attention, since the deadline for responding to our requests passed some time ago. ry truly yours, r L,. n 7 -- i o Ann Shotwell Assistant Attorney General ~ Environmental Protection Division One Ashburton Place Boston, MA 02108 JAS/BT Enc. S*h}}