Central Maine Power 

North Augusta Office Annex 

41 Anthony Avenue, Augusta, Maine 04330 

November 5, 1997 

Certified Mail - Return Receipt Requested 

Mr. Ross L. Gilleland, RPM 

U.S. Environmental Protection Agency 

Maine and Vermont Superfund Section 

JFK Federal Building 

Boston, MA 02203-2211 

RE: O'CONNOR COMPANY SUPERFUND SITE 

MONTHLY PROGRESS REPORT 

October 1997 -No. 83 

Dear Mr. Gilleland: 

Routing: ATS 

RGL 

File: (207) 626-9600 

730-b'& (207) 626-9633 

Environmental & Licensing 

Technical Services 

FILE COPY 

Please find enclosed three (3) copies of the October 1997 Monthly Progress Report for work 

performed on Remedial Design/Remedial Action activities for the O'Connor Company 

Superfund Site. This submittal is provided in accordance with Section XI, Paragraph 30 of the 

Consent Decree between the United States of America and central Maine power Company, 

lodged on December 7, 1990 and entered on September 3, 1991 and the Explanation of 

Significant Differences issued by the EPA on July 11, 1994. 

Three (3) copies of this progress report have also been forwarded to Wilkes Harper of the Maine 

Department of Environmental Protection and Mary Pothier ofCDM Federal Programs 

Corporation. 

s?DJ¢.1! 

Normand G. Michaud, P.E. 

Project Coordinator 

NGM:lhr bee: 

Enclosure 

cc: Wilkes Harper, MDEP (3 copies) 

Erin Heskett, USEP A (RAA) 

W. H. Laubenstein, ill, Esquire 

D. Mills, CMP (w/o encl.) 

M. Pothier, CDM Federal Programs (3 copies) 

I. Murarka, EPRI 

H. J. Vincent, W&C 

X:ILHRffRP/OCONNOR/LETIER2.DOC 

J. Pellechia, Katahdin Analytical 

J. Fougere, TSA 

Roy Lane, CMP 

C. Martin, Clean Harbors 

J. Sturgeon, SDS 

M. R. Smith, CMP 

D. Roy, SafeTech 

J. Fordham, W&C 

E. Carlson, W&C 
MONTHLY PROGRESS REPORT NO. 83 

October 1997 

O'Connor Company Superfund Site 

Augusta, Maine 

A. WORK PERFORMED DURING OCTOBER 1997 

Source Control CSQ 

• Complete on-site excavation, sampling and disposal of contaminated soils. 

• Complete construction of lagoons and upland marsh. 

• Close out Stage ill work area. 

• Complete site restoration Ooam & seed). 

• installed new monitoring wells MW507 and MW508. 

• Demobilized on-site laboratory. 

• Start removing site fencing. 

• Start demobilization activities. 

Management of Migration (MOM> 

• Submitted proposal for MOM design witb June sampling results on 8/11/97. 

• Received USEP A draft comments on vacuum enhanced recovery system data collection and interpretation letter 

report (June 27, 1997) and MOM comprehensive evaluation (June 1997). 

Riggs Brook 

• Finalized and submitted SAP, Rev. 2, on 10/22 .. 

• Conducted annual sediment sampling on 10/9 and 10/10. 

• Conducted additional biota sampling on 10/10. 

B. SUMMARY OF ANALYTICAL DATA GENERATED DURING OCTOBER 1997 

• Analytical database is updated weekly. 

• No data submitted per Ross G. 

• Final analytical data to be submitted witb SCRA summary report. 

C. PLANS AND PROCEDURES COMPLETED DURING OCTOBER 1997 

• Final Riggs Brook sediment and biota sampling and analysis plan (Rev. 2). 

D. IMPORT ANT UPCOMING ACTIVITIES 

Source Control 

• Complete fence removal. 

• Complete site demobilization activities. 

• Source Control completion ceremony. 

• USEP AIMEDEP final site inspection. 
0' Connor Progress Report #83 

Page2 

October 1997 

Management of Migration 

• Respond to comments on MOM comprehensive evaluation received 10/1/97 and develop a new MOM report. 

• Prepare groundwater monitoring report for September sampling. 

Riggs Brook 

• Remediate and restore areas around sample locations 8004 and 8013 where PCB is greater than 5 ppm. 

• Start preparing sediment and biota sampling report. 

E. WORK PROGRESS ON PLANS OR STUDIES 

Source Control Due/Submitted 

Date 

100%SCRA 

Wetlands construction 

& monitoring plan 

Progress 

7/9/96 

7/25/96 

Results of Phase I investigation July 24, 1997 

Panek Property 

Results of Phase I investigation July 25, 1997 

Brochu and Rodrigue properties 

Results of Phase II investigation/Phase III 

Remediation Brochu Property October 14, 1997 

Results of Phase II investigation/Phase III 

Remediation ofRodrigue Property December 15, 1997 

SCRA "Close-Out Report'' 

Field Work 

Phase II mobilization 

Limited wetland monitoring 

Phase II demobilization 

February 5, 1998 

5/5/97 

5/15/97 

11/30/97 

EPA Anproval 

Date 

7/30/96 

Needs EPA approval 
O'Connor Progress Report #83 

Page3 

October 1997 

Reports 

Weekly construction report 

Punch list due 

Monday of each week 

Items worked on as identified 

Draft RA report due 90 days from demobilization (February 1998) 

Management of Migration (MOM) 

Work Plans Due/Submitted 

Date 

EPA Aooroval 

Date 

Current Groundwater Monitoring 

SAP,Rev.4 

95%MOMRD 

Incorporating EPA comments received 

Revised MOM Report 

Field Work 

Quarterly Groundwater Sampling 

December Groundwater Sampling 

Reoorts 

Groundwater monitoring 

8th round summary & evaluation report 

Working on groundwater monitoring 

report for September sampling 

Riggs Brook 

3 

12/96 

Submitted: August II 

October I, 1997 

December 15, 1997 

Performed 9/23 & 24/1997 

Scheduled: week of December 8 

Submitted August II 

November 1997 

Work Plans Due/Submitted 

Date 

EPA Aooroval 

Date 

N/A 

Riggs Brook Sediment 

and Biota SAP, Rev. I 

Riggs Brook Sediment 

and Biota SAP, Rev. 2 

(Draft) 

Incorporating Comments 

Final Riggs Brook sediment 

and biota SAP, Rev. 2 

4/4/97 

Submitted: 7/I7/97 

Received USFWS 

EPA/CDM 5115/97 

Comments: 8128/97 

Scheduled October 24, I997 

Submitted: October 22, I997 
O'Connor Progress Report #83 

Page4 

October 1997 

Field Work 

Reoorts 

Sediment sampling 

Biota sampling 

Additional biota sampling 

Remediation/Restoration 

96 Riggs Brook Sediment 

Sampling Report 

97 Riggs Brook Sediment 

and Biota Sampling Report 

F. ISSUES 

Off-site Source Areas 

October9& 10, 1997 

Sepu.nber25, 1997 

October I 0, 1997 

Scheduled: November 3 through November 7, 1997 

5/13/97 

Scheduled: December 1997 

• Completed remediation of Brochu property. September2, 1997 

• Completed remediation of Rodrigue property. September29, 1997 

Source Control Design Issues 

Awaiting EPA approval of Wetlands Construction and Monitoring Report, submitted July 25, 1996. 

Received FWS comments. 

Received verbal acceptance from USEPA (Ross G.) and written acceptance from MEDEP )Wilkes H.) as to 

tbe cleanup of sample area 5B ( cP AH). No further removal action is required. 

Management of Migration Design Issues 

The MOM RD desigu proposal was submitted for EPA review 8/11/97. 

Received EPA comments 10/0 l/97. 

Working on revised MOM RD proposal. 

Riggs Brook Design Issues 

SAP finalized on I 0122197. 

Remediation and restoration at sample locations 8004 and 8013 scheduled for November 3 through 

November 7, 1997.