I

.. --- '

CDM -mwnenlal eng._., tclentlsts,

...... '~ CGniiAilltlll

October 4, 1984

Ms. Susan Santos u.s. Environmental Protection AgencyJFK BuildingBoston, MA 02203

Dear Ms. Santos:

I I I

)

CAMP DRESSER &McKEE INC.

One Center Plaza Bolton. MIUfCIIIIeltl 02108 1117 742·5151

Document Control No. 111-WPl-RT-AKFC-1 Western Sand and Gravel Site Water Supply Alternatives ScreeningWork Assignment No. ll-1L04

This letter and the accompanying attachments are to provide you with our preliminary screening of the nine alternatives which have been developed and our recommendations regarding the development of a water supply system for the affected residential properties downgradient of the Western Sand and Gravel site in Rhode Island. At this time, we believe that there is sufficient information on all of the alternatives to warrant selecting the alternatives for more detailed evaluation.

The u.s. Environmental Protection Agency, through its contractors and public hearing process, has generated nine different public water supply alternatives for the affected Western Sand and Gravel residents. Table 1 lists the nine alternatives and includes four general areas of consideration which influence whether or not the alternative should be considered further: cost, public health, technical considerations, an~ other considerations. We have tabulated existing c01nents and costs pertaining to the alternatives from existing information (Draft Record of Decision, ADL report, EPA report, GZA report). Although some of the specific details of the alternatives are not co~pletely defined, this .atrix provides a good relative evaluation of the various alternatives. The following represents an alternative by alternative discussion of the overall acceptability of each one:

1. Connection to Slatersville System. The c.apacity of the Slatersville syste., based on data generated by EPA and confirMed by COM (10/2/84), appears to be inadequate to .eet the additional needs of the affected area. To supply water to the affected residences, the Slatersville syste. ..Y require new water supply sources, storage and/or booster pu.ping facilities. Also, recently collected Rhode Island Dtpart.ent of Environ~ental Managa.ent (RIDEM) data indicates that in the past, volatile organic c011p0unds were detected fn one of the three Slatersville wells. This syst is approxf..tely three •11es (shortest distance) froM the affected area.

I. I I I

~- )

CAMP DRESSER & McKEE INC.

Ms. Susan Santos October 4, 1984 Page 2

2. Connection to Slatersville/Industrial System. This alternative consists of connecting a small system used for industrial water supply near Slatersville and the Slatersville muntctpal system. Based on extsttng information and recent confirmation by COM (10/1/84), thts combined system would require a booster statton, new well, tnterconnecttng piptng, and other factltttes to be able to serve the affected area. Also, the owners report high iron concentrations in the wells. In the long run, it w6uld appear to be more instttuttonallyacceptable to consider the Slatersville system only and avotd the potential problems of a Slater~vtlle/Industrtal interconnection.

3. Connection to Masonville System. Based on extsttng data, this systemconsists of one well, whtch ct_oes. not appear to have adequate capacityfor the existing residences. The system ts approximately 1.1 mtles from the affected area.

4. Connection to Turex Well. As per COM's recent dtscusstons wtth Turex (9/26/84). this industry has only one well, which ts barely adequatefor Turex needs. Based on this, the system ts judged to have inadequate capacity to serve the affected area.

5-8 New Wellfteld Construction at Sttes A-D. See Table 2 and the following · discussion.

9. Connection to Glendale Association System. Based on extsttng data as well as recent COM discussions (9/12/84) with the Glendale Assocatton •anager; th1s systa. appears to be old and barely adequate to .aet present Glendale needs. Based on thts infonaation, the system ts judged inadequate to supply the affected area.

In summary, it appears that none of the existing systems are adequate to supply the affected area. Consequently, to supply the affected area exclusively fro. an extsttng water supply system, a stgntftcant investment tn one of the existing syst..s -.y be necessary. The costs associated wtth renovating one of the supplier systeiS, including long tran~ission Matns,and necessary booster stations, do not appear to warrant additional tnvesttgation to evaluate the feastbtltty of havtng one of the existing syst..s entirely responsible for the supply of the affected area.

For the above reasons, we have generated Table 2, which SUIIIrtzes the geologtc and geohydrologtc tnfor.atton regarding each of the four identified groundwater sttes. Three of these four sites are ..pped on Ft gure 6-3 of the ~ 1984 ADL report.

Revtew of the data presented in Table 2 indicates that stt s B and C are closest to known hazardous ..stes sites and, consequently, have th

I. I I I

() )

CAMP DRESSER & McKEE INC.

Ms. Susan Santos October 4, 1984 Page 3

greatest risk of future groundwater contamination from the two known contaminant sources in the area. Therefore, the site B and C costs reported on Table 1 include costs for moving the wellfield (reconstructing the wellfield 2,500 feet from the mapped location) sometime after the wellfield is in use. As Table 1 shows. if sites B or C become contaminated in the future. the eventual cost of using the site becomes more than the original cost of developing either site Aor D (Tarkiln Pond). which we have assumed would not require relocation. The reason that sites B anc C become more expensive is that either water treatment or moving the wellfield could become necessary.

We recommend that sites A and Dbe evaluated because none of the existing systems presently appear to have the capacity to supply the affected area. It appears that a new water source will be necessary. regardless of the location. Any new source development should probably be close to the affected service area. At this time, both Aand Dappear to have the adequate supply for the affected area; however, site Amay be capable of supplying more water than site D. due to more favorable aquifer thickness and transmissivity. Consequently, all of the alternatives reconnended for evaluation consist of a new stand alone well supply system with the possibility of a physical connection to an existing system for both physical back-up and institutional reasons (as appropriate).

In s~~~~~~ary. we recommend that the fo11 owing tasks be perforn~ed:

1. Conduct exploratory well drilling on sites Aand D.

2. Conduct extended pump tests on sites Aand Das appropriate based on No. 1 above.

3. Evaluate a new (site A or D) well supply system with possible connection to an existing system.

Evaluation of the results of the task will be the selection of one of three possible long-ten. water supply alternatives: new well system - site A. new well syste.- site o. new well syste. (A or D) with connection to an existing systa.. The selected alternative will be the basis of the Focussed Feasibility Study.

We believe that the above reco.~ended progra. is the only realistic option. Therefore. we request your approval of the groundwater testing progra. as outlined in our work plan. We suggest that extended pu.ping tests be conducted s11Ultaneously at sites A and D (1f appropriate) to expedite data

I I I I

CAMP DRESSER & McKEE INC.

Ms. Susan Santos October 4, 1984 Page 4

collection. Therefore, we will conduct simultaneous extended duration pumping test unless you inform us otherwise. Please contact one of us or Mr. Paul Williams of this office, if you have any questions pertaining to this recommendation.

VerY, truly yours,

.CAMP DRESSER &McKEE INC. Approved by:

1/..~f~~~~ William R. SWanson 51 te f·1anager

Dr. Richard J. HughtoREM II Region I Manager

WRS/PMW/mhd

Enclosures

cc: Mr. David F. Doyle, COM Mr. William DiTullio, COM Mr. John Hartley, RIDEH

Al.l'E

JIMT

M

2 3 4 5 6

~

aJIPII.A

TD

I (F EX ISTD

I& IIIF(JIM

TD

I IEiiM

DD

I& la

TB

t SUIPLY Al.ltR

MT

MS

~·~

rAP~ alS

TS

OD

nftlctton to S1atersvt11e

-S

ysa

canr.ctto

n to

S1atersvt11e/

lnlvltr1a1 s~

o .,..w

w•tto

n at ~

o T,_

tsstc

n M

ltn o ID

oS

t«' S

t.t ton 0 ..... 11

OlAnd~

o £119. 1 ton

~tston (131)

0 Collt t~~g~~~ey ( Z

!ill) 0~

Sl,l'S

,IIIO

Com

ecttcn to fllsanoltlle

--S

yst.-

Cannect ton to T

urex Well

---.., N

ell Fte1d C

anstrvcted It S

tte A

0 .. N

ell and W

elllblse

(.-

2 ,.tNd

)

o ,_.. S

t.ttcn and

Cl'llor1111tton FIC

11tty o T

~ss1cn N

ltn o lA

nd ~sttton

o Eng. 1 C

onstrvc:tton ~tston (Ill)

0 Collt t l9

fiC1

( Z!ill)

0 10TN.

$156,1110

..,. Nell F

teld C

anstnd.ed It S

tte I 0 ....... ,

an

dN

illtblle

( ..... 2~Nd)

o ,._. S

tltton

and C

l'l1or1nattcn FIC

11tty

OS

IIES

MIII W

I) Aim IM

¥n

SITE

.. D.lY

lll.E I

lilliE

JSlA

II)

(2) PI&

.IC I£A

l TH TEO

IUrA

L OT1ER C

OC

SIMM

TitiiS(l)

. COCS IMM

TIOIIS

COCS IMM

T 10115

J~te C

apacity

o Trs

t.nt fflf'

re.J¥11 0 V

t 11 t ft!PII!SS of

of tro

n-., be necessary,

ent tt tes t IIY

O 1 wed

IS tt1e w

11 s of the

o Prevtous1y estlb

-

Jndustr11l sy

st. ~-

ltst.d tn

stttutto

n -

edly cantatns wte

r gtl

sllou 1d not be

tn tron con

centrltto

n.

necessary to estlb

ltsh

1 new one.

J~Ciplcity

~· C

lplctty

Ttt! praposed w

ll fteld

0 Const det"ed

to be

0 land IC4J1S

ttton ~G~ld tnduc:e tn

ftltrltton

best o

f Sttes A

,B,

0 tt w

ill be n

ece5S

II')'

,.,. ttle S

1atersvt lle

and C by E

M.

to estlb

ltsh Ill

Reseno1 ,.. ..,.....,. • th

e o T

rst.n

t (oth

er tn

stttutto

n fflf'

stte ~G~ld be located

thin

dllo

r1n

ltton

) o

perat ten at th

e

off th

e soutt.est comer

~G~ld ES

t ltkely

sy

st..

at the R

eseno1r tlhtdl not be r'e41fl'l!d.

ts ~tent ,.,. tt1e

coru

wtn

lted stte

and the

1ocatton o

f c:ont..tnated g

r"IIUid

iflter' dt sd

llrge to

th

e R

eseno1,..

Stte ts located «bbn-

0 T~ should be

0 land IC

4J1Sttton

grwttent ,.,. source

prwtdl!d fflf' vollt11e

o tt wt11

be

of c:o

nu

.tnltto

n and

flf'glltt cs re.J¥11 n

ece5

SII')'to

cauld posstbly tnter-

estlb

lt sh In

tnstt -

c:ept c:on

u.tn

lt ton

, tu

tton

fflf' opera-and r'e4l1 n

! the

rep lace-tto

n o

f the

syst.-.

of tt1e w

ll fteld fit'

constrvcttcn of w

ate

r tr

st.n

t factlttte

s.

QHO~aH aAI~YH~SINIHQY

'I:iiAY

Hf> Q

NY

QN

YS HHa~saM

pewu~ DuJeq

~uewn~op ~~~ ~o ,(~1111nb

~~~ o~' enp 11 ~I ·e~t~ou

If~~ UTI~~

JliiJ~ 888J

IJ

aBvwt wu~ ~~~ ~I =3~UON

-------\.,;

----

AllE

IIMT

M

6 (con

t'd)

7

I I I I I I 8

I

1!!U. ( cont 'd

)

CD

I'IAT

D CF E

IJSJIIi

II'Uia

TD

IEIM

tllli tMTBI SliiPI.Y

AllEJIM

TJYES

aJIIOJO

TS

o T,...s

sto

n Jilltn

o Lind Acqu1sttton

o Eng. I

Construction

Su

prftst O

ft (Ill) 0 Cant1 ftii"C

J ( 251) 0 SU

ITIJIN.

o llellfleld ..,1

.-,t

C

osts(4) 0 10TM

.

.... *1

1 ~~ld C

onstrvc:ted It S

tte C

o ...... n ... "-11 tblle

( ..... 2 ,...,,,.,

0 "-" S

Ut1 C

ll llld O

llort n1

t ton F.cf 11 tJ

o T.-.-fssfC

II l'ltn

o Lind Acqu1stttC

II o E

ng. I C

onstruction $uplrY

f st Cll

( 131) o C

ont t ftii'ICY

( 251) 0 SU

ITIJIN.

o "-llfleld

..,1.-

.t

Caltl(4

) 0 10TM

.

.., "-11 Field C

clnltriKted

It St",O

(...,. Tritln

,.., 0

... M

ell ... "-ll .... c·-z~,.,

0 ... S

tftfCII ...

OllortM

tton F.c

flttJ o T

....tsstGit M

ltn o Lind A

cqJtsttfon 0 E

ng. • ConstntctfG

it _

_..fsfo

n \13SJ

0 Cont fftiiiiC

J 2!il

0 'TOW.

~PIW. aJSTS

444,&50

528,!iDO

$972,150

756,111) 527 ,!iD

O

S1

,2M

,D

1fii,S

»

tiE'S

1al SND

Alit CM

VEL S

ilt ... J.Y n.LE, lilliE

JS

tNI)

(2) P

lait I£A

l1M

lEQ

IIIOO

. C

OIISIID

AT D

IS

CO

IISIIDA

T 10115

Gr'O

II'Idwlter It tilts

stte ._

be su

bje

ct to

CO

I'Italf nltf O

ft

fnll a

.. lllldflll.

Stlou ld c:onta.fnltf Oft

occur, tile ""'11C811!11t

of tile

wellffeld

or

CO

Mtrvctfon o

f wte

r treab

llnt f~etlfttes .. Y

be n

ece5H

I'J.

Sfte ts ~

tent fn11

Tre

et.n

t (other M

Y k

iiMt sources o

f tiiM

ch to

rt nit f O

ft)

con

ta.inlt f O

ft. .au

ld .ast ltk

ely

liCit be f'eCJI1 red

.

for op

era

t ton of tile

OHO~~H ~AI~YH~SINIHQY

'l:iiAY

HD

QN

Y Q

NY

S NH:3:~S~M

OI1IR

CO

ISIIDA

TJO

IS(l)

o land lic~J~fsftfon o stte

accesstbtlftJ

ts dtfftc

ult

0 ft wtll be

nece55a~Y to estlb-

lfsh .. tn

sftutto

n

for operation o

f tile

sJStM

.

o lllld IC(J

IIf tton

o tile

publfc Ills suggested tilts stte

for lo

atfo

n

of a new w

ell field

0 ft w

tll be n

ece5S

II'J to estlb-

lfsh .. fn

stftutfo

n

syste..

piWIIJ

~uewn:»op eq~ JO

K~uvn

eq~ o~ ' enp •1 ~~ '1:»1~ou 8111~

uvq~ net:» 8811 81

e8vw1 W

IIJ 111~ Jl =30UO

N

-------,,

----

All'EJIM

T lYE

9

lintS

ConnectiO

M to G

lendale w

ater ~tatton S

,sta

in Glendale

1!!:t! (cant. d)

aJIIU

TD

CF El1ST111i -.-

ro

IUM

DD

C IM

1Bt SliiPLT A

LTBIMTIV

ES

IIES1m

l 5IUit • •m

sm

~Pmt. CD5TS

.. D.1Y

D.1E, IIIIE

ISlAIII

(2)

Pta.IC

I£A

lnt

ailS IID

AT JO

G

liDIU~L

ailS IID

AT

IOG

o The extsttng wn

1s

located about 1.5 !Iiles W

1l1 fra.

affected IaR

S.

o The existtng wll

blrely has the c:apactty (about 30 !Jill) to

satisfy

dBunds o

f A

ssoctatton. o A

ssociation's dts­

tr1button syste

l is old

(1932) and conststs o

f 2-in

. d

1..e

ter ca

st iron

.ain

s; it .auld

n

ot be ~

to

convey wter ~

ly

to B

urr111vtlle.

All cost _

. d

iUtn

m fra. &

M.......U

l Resource

~tetes, tit. report to

EM

, Ap-tl 9

, 191M, except llle

re noted.

(l)Ottler canstd!rlttons tnelud! tnstttuttonal canstclerations, w

tl11191!'SS of en

tities imolvat and land at(JIS

1tton.

OTlER ailS IID

AT

IOG

(1)

o it .auld

be neces­sary to construct a new w

ll, rennovate th

e extsting llll"'ing

and distrib

utio

n

SysteiiS

, and construct a

bo

ut 1.5 •ile

s of new

wte

r trans.issio

n

.ain

s. T

he resultirig costs o

f tilts alter­native .au

ld be

exorbitant.

< 2>rou1 casts lined

en unit pr1ees, percentages, and prablble footages estt.ated by E

nvi~al R

esource Associates (E

M), A

pr11 9

, 191M.

Does not

tnclude

stor191 tn

ani ~ costs.

(l)Co

st •ttlllte lin

ed en p

on

tble c:anta.tM

tion at ftrst wllfte

ld and need to II!V

e w11f1eld iP

P"'X

illltely 2500 feet. C

osts of IIIV

fng w11f1eld (E

M, 191M

-

dollars ba

ed

en EM u

rrtt pr1

ca arw ~ to

be less thin

or equal to

a vo

latile organic treat.ent facility

.

( 4)A11

costs based en EM e

ti-..s

for Site A

.

miO

=>

gH

gA

I.LY

H.L

SIN

IHa

Y

'I~AYHf>

aN

Y a

NY

S

Nl{g

.y,sgM

pawu~ D

utaq ~uawnoop aq~ ~o ,(~uvnb

aq~ o~ anp •1

~I •ao1~ou

1111~ uvq~ aa1o 1111 •1

t81tWf Wfl~ Ill~ ~I =301lO

N

-------l;.

----

-TO (J

Mrm

CU

ISDM

TJDIIS

tst. Sitiii'itiil

tit1iit:id

2

~

1Mc:kM

U ~ tq

T,.._,sstvt~ itt ld

lyl

A

50(1) scm

-8000( 1)

• 5

0(1

) >

am

(l)

c m

U)

>am

(l)

D

~(1)

2500-50110 (1)

TAIL£ 2

~m ElPlO

RA

TIDII SIT

£ SELECTIDII

WE

smtl SA

il» All» liRA Y

Et SIT

£ IU

Rit IllY

Ill£ • RHOOE

ISLAII»

Present and E

xpected future S

urffcfll Geology

Grourldlflter 9!!! 11 ~

flood platn -stlty

W

ell .auld

tnduce tnffltratto

n

allu.tu

. underla1n(2 ) fra1 S

llterSv

tlle Resen

otr.

bJ sand and grevel S

fte ts located up-grldtent fra~

cont..tnated site; no future

water qualtty p

rob

l.s are ant f ct p

ated.

ec.. d!lta -

tfltn W

ell .auld

tndUCII! tnffltratto

n

~well-sorted

fn11 SllterS

vtlle R

esenot,.. gravel

Oft!" 1 xt ng

Stte ts

loe~ted cbln-grldtent COI~)or ftne

,,. cont..tnated sfte lnd

Sind aJU

id possfbly fnten:ept con

t.-tnatton.

ec.. d!l ta wfth

SO

le W

ell .au

ld induce fn

ffltratfon

E

sker -pebble to

fl'lll Slatersv

ille Resen

ofr.

cobble gravel ln

d

(2 ) S

tte could posstbly tntercept S

ind. p

oo

l' ly sorted conta.tftlttan fn11 U

RR

llnd

ftll stte

.

ec.. d!l tl wfth

SO

le W

ell .auld

fnduce inffltratto

n

Crev

iS• ftlltn

g -

pebble fn11 T

ritln P

ond. and stte ts

to cobble gravel lnd

up-grldtent fn11 any k1101111 sand.

po

ol' ly sorted.

sources of cont..tftltfon; no

lOC

il tflfn 1~ o

f future M

iter CJJ~ltty pro

bl.s

stlt and cl~

are ant f cf pated

.

locltfo

n A

elatfve To A

ffected Area

(Un

gth

tn feet or T

rans.tssfon Mlfnl

Accessfb111ty

3.200 E

astly Accesstble

450 E

astly Accessible

2.850 Poorly A

ccessible

2.600 E

asfly Accessible .-( --

(l)Oitl cM

.Itned fra1 ~logic._ o

l tile lrln

dl R

her B

astn. Rhode

Island. found fn Anfllbfl!~ of G

round 111ter fn the Brlnch R

fver Basfn. Provfdence

Cclur(y • .

._

Island. bJ H.£ • .Jenison M

d D.C

. Dtc

ar-t. USGS. w

ater Resources

Investt!iif1ons is-4. D

!liilii!r 1974.

(Z)O

btafned fral G

eolagfc ... ol tile

Georgtw

flle C)lld

rqle. R

hode Island. found fn 1lle G

eology and &roun1141ater R

esources or the Gl!c!rgfw

flle !)!ldrangle. Jlttodl

blan

d bJ &

.M. R

fdlm

ld M

d W.l. A

llen. 1951.

miO

::>a

ll aA

IJ.Y

liJ.S

INIH

aY

'l:iA

YliD

am

c a

me

s Nll~.r.saM

pewnJ. uu1eq

~uewn:»op "I~ J.O ~~1renb ear~ o~ 'enp 11 ~I 'e:»1~ou lllf~

UVlf~ JVII:» 1881 II

IBVWI W

IJJ. llf~ J.l =3:>UON

_____ ._._

----