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401-421-4140

FAX 401-751-8613

A Subsidiary of GZA GeoEnvironmental Technologies Inc

GeoEnvironmental Inc Scientists

April 10 1995 File No 3103000

Mr Dennis aRusso Environmental Manager RI Solid Waste Management Corporation Central Landfill 65 Shun Pike Johnston Rhode Island 02919

Re Central Landfill Operable Unit 2 RIFS Progress Report No 3 Work Period March 10 to April 10 1995

Dear Dennis

This letter with attachments serves as the third progress report prepared by GZA Geoenvironmental Inc (GZA) associated with activities completed to date on the Central Landfill Operable Unit 2 Remedial InvestigationFeasibility Study (RIFS) This progress report has been prepared in accordance with the requirements of Section 37 of the Administrative Order by Consent US EPA Docket No 1-87-1016 We prepared this letter on behalf of the RISWMC in accordance with the terms and conditions of our July 9 1992 Environmental Engineering Consulting Services Contract

Please do not hesitate to call me at ext 320 with any questions or comments regarding this information

Very truly yours

GZA GEOENVIRONMENTAL INC___ ^ 7 - S

Edward A Summerly P Project Manager

EASpab

Attachments Progress Report No 3 Summary Table

Mr James BrownUSEPA (3 copies) Ms Becky CleaverHNUS (1 copy) Mr Warren AngelRIDEM (2 copies)

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PROGRESS MADE THIS REPORTING PERIOD

DeliverablesCorrespondenceMeetings

The following deliverables were submitted to EPA and RIDEM by GZA on RISWMCs oz behalf

bull Work Plan for Stream Flow Measurements - OU2 Task 3 was submitted on March 29 1995

RISWMC is currently awaiting EPAs reviewapproval of this document the Operable Unit 2 Remedial Investigation Draft Work Plan Response Summary submitted on February 17 1995 and the Draft Feasibility Study Work Plan - Operable Unit 2 submitted on March 9 1995

Additionally the March 1995 progress report contained a schedule for the Phase IOU2RI Tasks RISWMC anticipates that EPA will provide comments or approval of this proposed schedule in the near future RISWMC will operate in accordance with the proposed schedule until otherwise directed

On April 4 1995 the EPA approved RISWMCs request that they be allowed to perform the OU2 Risk Assessment RISWMC has requested the GZA assist them in project planning and preparation of an OU2 Risk Assessment Work Plan

Operable Unit 2Task 4 Well Installations

The drilling contractor remobilized to the site with the packer testingwell installation rig on March 8 1995 The contractor proceeded to remove accumulated debris from MW95-47 and install a monitoring well at this location The monitoring well was screened from 51 feet to 41 feet with centered within a fourteen foot sand pack

Development of MW95-ML9 prior to in situ testing began on March 10 1995 A total of 870 gallons of water was purged from the deep boring using a combination of pumping and surging the borehole to reach a final turbidity level below 20 NTU March 13th and 14th were spent re-configuring the packers to a ten foot testing interval testing the new configuration and setting the packer assembly to the bottom of MW95-ML9 EPA oversight was provided during this time by Mike Healy of HNUS From March 13 through March 21 1995 GZA packer permeability tested and collected discrete zone

Central Landfill Operable Unit 2 RIFS Progress Report No 3 Page 1 of 3

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groundwater samples from MW95-ML9 and upon completion of packer testing the contractor purged a volume of water equal to that lost to the formation during testing Field screening gas chromatograph screening and hydraulic conductivity test results are provided on the attached table GZA is evaluating the VOC screening geophysical analysis and hydraulic conductivity testing and will submit recommendation to EPA regarding the placement of wells within this hole

As detailed in Progress Report 2 GZA discovered borehole MW95-52 caved-in for a second time Consequently the boring had to be redrilled prior to any further testing or well installation Due to the potential for additional borehole collapse GZA did not attempt to packer test MW95-52 After reviewing of the log for MW95-52 and discussing our previous recommendations regarding well screen placement with the EPA GZA mobilized an auger rig to the site on March 21 1995 to ream out the accumulated debris and install a monitoring well in the boring The well screen was installed to span the most likely water bearing fractures encountered at depths of 20 to 22 feet 31 to 32 feet and 38 feet This installation should adequately meet the functional requirements for future piezometric and water quality monitoring at this location

UPCOMING EVENTSACTIVITIES

Meetings

A meeting between RISWMC EPA and the GZA RI and RA project teams has tentatively been scheduled for April 26 1995 at 10 am to be held at RISWMCs offices in Johnston Rhode Island The purpose of the meeting is to discuss and finalize to the extent possible the scope of the Phase I OU2RI and the OU2RA

Field Activities

OU2Task 4 - Well Installations Field activities for this task will continue into the next reporting period and will likely include the following

bull GZA is evaluating the VOC screening geophysical analysis and hydraulic conductivity testing data and will submit recommendation to EPA regarding the placement of wells within this hole

bull Deep Borehole Well Installation - anticipated start date is May 1 and completion date is May 3 1995

bull As-built survey of exploration locations - anticipated completion the week of May 8 1995

Central Landfill Operable Unit 2 RIFS Progress Report No 3 Page 2 of 3

Please note that field activities are highly dependant on the weather and the availability of subcontractors and equipment and are thus subject to change We will notify EPA and RIDEM as such changes become evident

KEY PERSONAL CHANGES

No substitutions have been made to the GZA project team however the risk assessment oz group has been expanded to include Gregg McBride as technical reviewer The team remains for the OU2 RIFS Michael Powers is the Principal in Charge and technical reviewer for the RI Edward Summerly is the Project Manager for the RIFSRA projects and technical lead on the RI project Douglas Larson is the technical lead on the PS project Albert Ricciardelli is the technical reviewer for the FS Lisa Camp is the Human Health risk assessment specialist Timothy Briggs is the wetlands and ecological risk assessment specialist Stephen Kline and Matthew Bellisle are the project engineers and Mark Dalpe is the project field geologist

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groundwater samples from MW95-ML9 and upon completion of packer testing the contractor purged a volume of water equal to that lost to the formation during testing Field screening gas chromatograph screening and hydraulic conductivity test results are provided on the attached table GZA is evaluating the VOC screening geophysical analysis and hydraulic conductivity testing and will submit recommendation to EPA regarding the placement of wells within this hole

As detailed in Progress Report 2 GZA discovered borehole MW95-52 caved-in for a second time Consequently the boring had to be redrilled prior to any further testing or well installation Due to the potential for additional borehole collapse GZA did not attempt to packer test MW95-52 After reviewing of the log for MW95-52 and discussing our previous recommendations regarding well screen placement with the EPA GZA mobilized an auger rig to the site on March 21 1995 to ream out the accumulated debris and install a monitoring well in the boring The well screen was installed to span the most likely water bearing fractures encountered at depths of 20 to 22 feet 31 to 32 feet and 38 feet This installation should adequately meet the functional requirements for future piezometric and water quality monitoring at this location

UPCOMING EVENTSACTIVITIES

Meetings

A meeting between RISWMC EPA and the GZA RI and RA project teams has tentatively been scheduled for April 26 1995 at 10 am to be held at RISWMCs offices in Johnston Rhode Island The purpose of the meeting is to discuss and finalize to the extent possible the scope of the Phase I OU2RI and the OU2RA

Field Activities

OU2Task 4 - Well Installations Field activities for this task will continue into the next reporting period and will likely include the following

bull GZA is evaluating the VOC screening geophysical analysis and hydraulic conductivity testing data and will submit recommendation to EPA regarding the placement of wells within this hole

bull Deep Borehole Well Installation - anticipated start date is May 1 and completion date is May 3 1995

bull As-built survey of exploration locations - anticipated completion the week of May 8 1995

Central Landfill Operable Unit 2 RIFS Progress Report No 3 Page 2 of 3

Please note that field activities are highly dependant on the weather and the availability of subcontractors and equipment and are thus subject to change We will notify EPA and RIDEM as such changes become evident

KEY PERSONAL CHANGES

No substitutions have been made to the GZA project team however the risk assessment oz group has been expanded to include Gregg McBride as technical reviewer The team remains for the OU2 RIFS Michael Powers is the Principal in Charge and technical reviewer for the RI Edward Summerly is the Project Manager for the RIFSRA projects and technical lead on the RI project Douglas Larson is the technical lead on the PS project Albert Ricciardelli is the technical reviewer for the FS Lisa Camp is the Human Health risk assessment specialist Timothy Briggs is the wetlands and ecological risk assessment specialist Stephen Kline and Matthew Bellisle are the project engineers and Mark Dalpe is the project field geologist

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Please note that field activities are highly dependant on the weather and the availability of subcontractors and equipment and are thus subject to change We will notify EPA and RIDEM as such changes become evident

KEY PERSONAL CHANGES

No substitutions have been made to the GZA project team however the risk assessment oz group has been expanded to include Gregg McBride as technical reviewer The team remains for the OU2 RIFS Michael Powers is the Principal in Charge and technical reviewer for the RI Edward Summerly is the Project Manager for the RIFSRA projects and technical lead on the RI project Douglas Larson is the technical lead on the PS project Albert Ricciardelli is the technical reviewer for the FS Lisa Camp is the Human Health risk assessment specialist Timothy Briggs is the wetlands and ecological risk assessment specialist Stephen Kline and Matthew Bellisle are the project engineers and Mark Dalpe is the project field geologist

FJOBS31030EASPR3RFT

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1. barcode 3224
2. barcodetext SEMS Doc ID 3224

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1. barcode 3224
2. barcodetext SEMS Doc ID 3224

s ei

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1. barcode 3224
2. barcodetext SEMS Doc ID 3224