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WORK ASSIGNMENT STATUS REPORT EPA CONTRACT NO. 68-01-6699, MOD. NO. 46

WORK ASSIGNMENT NO. 19.:.1W22.0 SILRESIM SITE

MIDDLESEX COUNTY, MASSACHUSETTS NUS PROJECT.NO. 0726

Activity: Initial Remedial Measure

1. Progress this Period - December 1983:

C. J. Mabardy, the capping contractor has installed the Silresim Site run-off . 36-inch-diameter sewer . line to River Meadow Brook, including the catch . basin on site. The site contours· are being brought up to grade. The contractor h•s installed 3600 cubic yards of bank run gravel. Total required is about 4400 cubic yards. The contour swale was moved to compensate for Interferences with an existing foundation mat. the contractor has been on site 27 days, with a 55-day completion schedule. Meetings were held with EPA Region I concerning the capping of the site. Weather conditions (freezing) will hamper efforts to meet capping compaction specifications. Meetings were held with the contractor to discuss capping.

2. Problems Resolved:

Installation of the sewer line resulted in major interferences. The 29 inch x 42 inch corrugated sewer ran directly into the 12-inch-diameter water lin& in the street. The water line was only buried 3.9 feet from grade, not 6 feet as·~ originally determined by water company engineers. The 29 inch x 42 inch sewer was removed and two 18 Inch x 29 inch· corrugated lines were Installed. This allowed the new sewer to pass atop the water line. A new street catch basin had to be installed, since the existing catch basin interferred with the new sewer line which had to be adjusted due to interferences with existing gas lines. Meetings with the contractor regarding the capping were conducted. The contractor will try to meet capping specifications but ·will shut down If poor weather conditions prevail.

3. Anticipated Problem Areas and Recommended Solutions:

The major preble~ is the capping of the site. The specifications clearly define requirements. Inclement weather (freezing, rain, snow) definitely affects proper compaction. ll Is recommended that capping be deferred until warmer weather appears. The Contractor indicated he will shut down during • adverse weather conditions. The bulk storage tanks are still being stored until documents are instituted for public sale.

4. Deliverables Submitted: None

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WORK ASSIGNMENT STATUS REPORT WORK ASSIGNMENT NO. 19-1W22.0 PAGE TWO ' 5. Upcoming Events:

Remedial Planning Office (REMPO) personnel will supervise the site contractor for Implementation of capping and finishing of sewer Installation.

6. Activities Planned:

Capping Is being ·implemented unless weather conditions prevent continuation of capping. No capping has been performed, as the site Is being brought up to grade.

7. Key Personnel Changes: None

8. Subcontracting:

The following work ch·anges were added to bid or approved by the REMPO:

• Changed sewer from one sewer measuring 29 inches x 42 Inches to two sewers measuring 18 inches x 29 Inches. Changed location of catch basin to first manhole in street.

• Added catch basin for Cambridge Street

• · Relocated a 4-lnch gas line by Colonial Ga~ Company.

• Moved sewer line suit gas lines to Cambridge Street.

9. Travel this Period:

' REMPO personnel will travel. to Lowell, Massachusetts, for review of the contractor's progress.

10. Contract Laboratory Program: No Involvement

11. Schedule Changes:

Depending upon weather conditions. the capping may be Interrupted periodically, resulting In an extension of the construction schedule.

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WORK ASSIGNMENT STATUS REPORT EPA CONTRACT NO. 68-01-6699, MOD. NO. 27

. WORK ASSIGNMENT NO. 19:..1M32.0 SILRESIM SITE

MIDDLESEX COUNTY, ,MASSACHUSETTS NUS PROJECT NO. 0738

Activity: Remedial Investigation/Feasibility Study

1. Progress this Period - December 1983:

The project is on hold pending an EPA decision regarding the inte.rest• status of the prpject.

2. Problems Resolved: None

3. Anticipated Problem Areas and Recommend~ Solutions: None

9. Travel this Period: None

10. Contract Laboratory Program: No Involvement

11. Schedule Changes: None

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4. Deliverables Submitted:

5. Upcoming Events: None

6. Activities Planned: None

7. Key Personnel Changes:

8. Subcontracting: None

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