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Mr. Michael Nalipinski Horch 12 , 1992 Page 2

Fuss & O'Neill received authorization from DEP in the final Emergency Discharge Authorization dated February 10 , 1992, for the use of four-foot diameter carbon filter• in place ot the originally specified five-foot diameter carbon filters for the Interim Removal Traotmant System. Linullster hes ordered the new carbon filters along with the air stripper , transfer pumps, equalization tanka, etc. The urget date for the completion of the system is April 13 , 1992.

on Februery 19, 1992, representetives of LinemB&ter , EPA, Fuss & O'Neill and Arthur D. Little (ADL). attended a meeting at Linemaster to diacuas EPA comments on the Initial Site Characterization Report ( ISCR) a nd the Work Plans. Short term project related topics were discussed including; background metals sampling, Zone 1 pumping test, installation of additional well clusters west of the ,...feciUty a nd soil sempling techniques . In addition, long

te rm project related topics were discussed including; the

ecological site assessme nt , the Feesibility Study , t he -iii!

existence of DNAPLs end the project time table.

On February 28, 1992 ADL provided information on the number = of samples required for determining the background metal = concentrations. The number and locations subsequently were confirmed in a letter from EPA dated March 10, 1992. In addition, resolution has been reeched on the Zone 1 pump test and the installation of the addi tionel moni taring wells west of the facility.

Fuss & O'Neill will modify the SAP for soil sampling to specify the use of 120 ml sample vials in accordance with the site-specific procedure recently adopted by Region 1 of the U.S. EPA.

Progress wes made in discussing the long-term project related topics. Fuss & O'Neill will evaluate epplicable technologies for the remediation of ONAPLs located in the soil and ground water under the Linemaster fecili ty building. Fuss & 0' Neill agreed to attempt to complete the RI /FS by the previously esteblished July 17, 1992 terget date, though promp't review of Interim Deliverable& by EPA a nd its subcontractors will be essential. Completion of

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" CaR.~ Fuss&O'Neilllnc. c--.. Mr. Michael Nalipinsk i March 12, 1992 Page 3

the RI/FS by the target deadline will maximize the time

available for public review and coiiiiDent.

f'Uaa & 0 ' Neill has addressed the coaunents contained in the

January 23, 1992 EPA letter regarding the Work Plan tor the

Rl/FS and the Phase l B Work Plan . Work Plan revisions were

trena•itted to the EPA by Fuss & O'Neill on February 26,

1992.

F e nnibtl ity S t udy

An initiel TCE ma s s balance haa been calculated for t he

uns atura ted till and fo r t he till , a hallow bed rock a nd deep

bedrock aquifers. A mathematic a l modal has been de veloped

to estimate the mass distributio n o f TCE with time withi n

the above r eferenced hydros tra tigraphi c units defined at

the Linemaster site . Both the TCE mass belanc e a nd a draft

copy of t he mathematical model are presently undergoing in

hous e reviews. -,... z Fuss & O'Neill has prepared aamplea in-house for laboratory

analysis to determine TCE retention in the till soils

collected at the site. The results of this test will be

ueed to help e s timate the amount of TCE in the aoil and

ground water in the soil at the Zone 1 area,

Screening of technologies is continuing and Fuss & 0 ' Neill is incorporating input received from the EPA and ADL during the meeting at Linemaster on February 19 , 1992. A revi s ed preliminary screening was included in the resubmitted Work Plan for the RI / FS. Additional EPA comments will be incorporated in the Draft RI / FS .

The benc h s cale vacuum extraction s tudy conduc ted by the Environmental Res earch Institute a t the Unive r si t y o f Connec tic ut was completed on Februa ry 6, 1992. The compi led data wa s forwarded to Fuss & 0 ' Ne i ll on Feb r ua ry 2 6 , 1992 a nd i s be ing revie we d a nd e valuated.

pntn S ummn ry

The fi n a l data set f o r Round 2 s ampling o f Phase 3 mo nitoring wells, including MW-16 t , MW-16ab, MW-23t, MW-24t

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Hr. Michael Nalipinski Mar ch 12, 1992 Page 4

and MW-26t was received from the laboratory and is included sa Attachment A.

Scbedyle gf Acthftiea

Quarterly supply well sampling in accordance with the Interim Water Supply We ll Monitoring Program ia scheduled to occur during the second week of March 1992 .

Initiation of the zone 1 pump teat 1& scheduled for March 16, 1992.

I nstallation of the e ddi tio nal wel l clusters west of the Linernaater facility i s tenta t ively sched uled to begin o n March 18 , 1992.

Fuss & O' Ne ill a nti c i pates t he revisions t o t he I SCR to be s ubmitted on Ma r c h 20 , 1992 e s s t a ted i n the Fe bruary 2 6 , r 1992 letter to EPA . -2A revised Rl / FS schedule is attached as Attachment B. If you have any questions or require additional = information, please do not hesitate to call. = Very truly yours,

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Target Sheet

US EPA New England Superfund Document Management System

File Break: 3.7 – Work Plans & Progress Reports

The analytical reports associated with this record may be reviewed, by

appointment only, at the EPA Region I Records Center in Boston,

Massachusetts.

For assistance please contact the EPA New England Office of

Site Remediation and Restoration Records and Information Center

Telephone: (617) 918-1440

Email: R1.Records-OSRR@epa.gov

mailto:R1.Records-OSRR@epa.gov

barcode: *577599*barcodetext: SDMS Doc ID 577599