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Source: USGS Topographic Quadrangle, Glen Alien,".-."_ _-. /Virginia, 1963, PhotorevisecU 994.

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AR302369

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Aft302377

Ground Water PCB Data

MW-1upgradient

unfilteredfiltered

Phase I RI — Phase II RI Group's(fig/L) <|ig/L) (|i_s/L)

ND ND . ND- ND

MW-3Ddowngradient

unfilteredfiltered

ND ' - -1.9L .... ,r. ND_-__. -,..,_ ND

MW-3Bdowngradient

unfilteredfiltered

- 3.5L NDMT>

PCBs not detected any of the shallowwells

Development record indicate highturbidities

• PCBs in MW-3B could be due to mudrotary drilling.

ftR302378

Ground Water Beryllium DataWellNo.MW-I

MW-2

MW-3

MW-3B

MW-3D

MW-4

MW-5

MW-6

MW-8

MW-SD

SampleType

unfilteredfilteredunfiltered

filteredtmfiiteredfilteredunfilteredfilteredunfilteredfilteredunfilteredfilteredunfilteredfilteredunfiltered

filteredunfilteredfilteredunfilteredfiltered

fhaselRI-(ng/u

- - 1 2 . _NDNDND165

• - -----

:__..___ is •419 .. .

• ND

4:.. : - 2

- . -. ... -_-_:. - . . - - - - :

• • - . . . . - - - • - . _

-__ - . .

...__ . . ._.—— . - .

'• —— -

- - -.-:- •••-•

Phase II RI(M-S/D

...-.- 1.6' 1,4i.2

--- : ;ND

- 7.5.

6.7

- ND' - - ND

-NDND

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4. .: -. 3,4

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8 \.ND

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Group's(ng/u

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1 - -

— - -

— - -

.

,

0.1ND0.70.4

— •.,...,

. .

-----"

— ."

——_--

Beryllium present in both upgradient andon-site wells at similar concentrations

RI/FS concluded that beryllium is naturallyoccurring and will not require remediation(FS/Pg.2-2Q) /

AR302379

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AR302382

\&HBurn Pit SiteI

ijjjwparison of Proposed Remedies

£P/i Criteria____USEPA Alternative | Group AlternativeOverall Protection ofjHyman Health and theWnvironment

Compliance with ARARS

Long-term Effectivenessand Permanence

Reduction of Toxiaty,Mobilifty, or VolumeThrough Treatment

Short-Term Effectiveness

implementability

Costs

State AcceptanceCommunity Acceptance

AR302383