LEGGETTE, BRASHEARS & GRAHAM, INC.
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LEGGETTE, BRASHEARS & GRAHAM, INC. PROFESSIONAL GROUND-WATER AND ENVIRONMENTAL ENGINEERING SERVICES 76 PEARL STREET SUITE 203 ESSEX JUNCTION, VT 05452 802-288-9600 FAX 802-288-9881 www.lbgweb.com November 11,2009 Ms. Lynn Mansfield Housing Vermont 123 St. Paul Street Burlington, Vermont 05401 RE: Petroleum Contaminated Soil Removal, Union Street, Windsor, Vermont SMS Site # Pending Dear Ms. Mansfield, Leggette, Brashears & Graham, Inc. (LBG) has prepared this report to document the evaluation and removal of petroleum contaminated soil encountered during a construction project on Union Street in Windsor, VT. The site location is depicted on attached Figure 1. Following the removal of a concrete slab at 6 Union Street in Windsor, Vermont the excavation contractor discovered what he believed to be petroleum contaminated soil. The contractor immediately contacted Housing Vermont to make them aware of this discovery. Housing Vermont immediately contacted LBG and requested that they investigate suspected soil contamination. LBG visited the site on September 24, 2009 and met with Kingsbury Construction. Using a track excavator, soil was excavated in the area of the alleged contamination. Soils removed in this area offered an old gasoline like odor and registered positive volatile organic compound (VOC) readings when measured by a photoionization detector (PID) using conventional headspace sampling methods. The contaminated soil appeared to be isolated within a circular red brick structure. The red brick structure was approximately 8 feet in diameter. Excavation inside the structure resulted in PID readings between 11.9 and 121 parts per million/volume (ppmv). The excavation extended to a depth of approximately 6 feet below grade. Excavated soils were temporarily stockpiled on 4 mil polyethylene sheeting. Five test pits were excavated around the outside of the structure as depicted on Figure 2. Soil encountered inside the structure consisted of olive/grey fine sand with silt. The native soils outside of the structure consisted of course sand and gravel. Groundwater was not encountered in any of the excavations. The soil was placed back into the structure until a soil management plan was approved. LBG apprised Housing Vermont of the findings and recommended removing the soil from the structure and transporting it to ESMI in Loudon, New Hampshire for subsequent treatment. ESMI was contacted by LBG and instructed LBG to collect a sample for total petroleum hydrocarbons (TPH) and lead. Samples were submitted to AMRO Environmental Laboratories Corporation in Merrimack, New Hampshire for analysis. The results of analysis met acceptance criteria at ESMI and can be found in Attachment 1. CONNECTICUT • OHIO • ILLINOIS • SOUTH DAKOTA • PENNSYLVANIA • FLORIDA • NEW JERSEY • MINNESOTA TEXAS • WISCONSIN • NEW YORK • MISSOURI • VERMONT • MICHIGAN • GEORGIA
Transcript of LEGGETTE, BRASHEARS & GRAHAM, INC.
LEGGETTE, BRASHEARS & GRAHAM, INC.PROFESSIONAL GROUND-WATER AND
ENVIRONMENTAL ENGINEERING SERVICES
76 PEARL STREETSUITE 203
ESSEX JUNCTION, VT 05452802-288-9600
FAX 802-288-9881www.lbgweb.com
November 11,2009
Ms. Lynn MansfieldHousing Vermont123 St. Paul StreetBurlington, Vermont 05401
RE: Petroleum Contaminated Soil Removal, Union Street, Windsor, VermontSMS Site # Pending
Dear Ms. Mansfield,
Leggette, Brashears & Graham, Inc. (LBG) has prepared this report to document theevaluation and removal of petroleum contaminated soil encountered during a constructionproject on Union Street in Windsor, VT. The site location is depicted on attached Figure 1.Following the removal of a concrete slab at 6 Union Street in Windsor, Vermont theexcavation contractor discovered what he believed to be petroleum contaminated soil.The contractor immediately contacted Housing Vermont to make them aware of thisdiscovery. Housing Vermont immediately contacted LBG and requested that theyinvestigate suspected soil contamination. LBG visited the site on September 24, 2009and met with Kingsbury Construction. Using a track excavator, soil was excavated in thearea of the alleged contamination. Soils removed in this area offered an old gasoline likeodor and registered positive volatile organic compound (VOC) readings when measuredby a photoionization detector (PID) using conventional headspace sampling methods.The contaminated soil appeared to be isolated within a circular red brick structure. Thered brick structure was approximately 8 feet in diameter. Excavation inside the structureresulted in PID readings between 11.9 and 121 parts per million/volume (ppmv). Theexcavation extended to a depth of approximately 6 feet below grade. Excavated soilswere temporarily stockpiled on 4 mil polyethylene sheeting. Five test pits wereexcavated around the outside of the structure as depicted on Figure 2. Soil encounteredinside the structure consisted of olive/grey fine sand with silt. The native soils outside ofthe structure consisted of course sand and gravel. Groundwater was not encountered inany of the excavations. The soil was placed back into the structure until a soilmanagement plan was approved.
LBG apprised Housing Vermont of the findings and recommended removing thesoil from the structure and transporting it to ESMI in Loudon, New Hampshire forsubsequent treatment. ESMI was contacted by LBG and instructed LBG to collect asample for total petroleum hydrocarbons (TPH) and lead. Samples were submitted toAMRO Environmental Laboratories Corporation in Merrimack, New Hampshire foranalysis. The results of analysis met acceptance criteria at ESMI and can be found inAttachment 1.
CONNECTICUT • OHIO • ILLINOIS • SOUTH DAKOTA • PENNSYLVANIA • FLORIDA • NEW JERSEY • MINNESOTA
TEXAS • WISCONSIN • NEW YORK • MISSOURI • VERMONT • MICHIGAN • GEORGIA
Ms. Lynn MansfieldNovember 11, 2009
After receipt of the analytical data, LBG contacted Ms. Tarni Wuestenberg of theState of Vermont Department of Environmental Conservation. Ms. Wuestenbergindicated that if the soils were removed from the structure, treated at ESMI and a sampleoutside of the structure did not exhibit contamination the site would be closed and nofurther action would be required.
Excavation of the soil was performed on October 1, 2009 by an excavatingcontractor under the direction of Kingsbury Construction and LBG. Three truckloads ofsoil were removed from the structure. Due to the high percentage of moisture in the soilsome clean soil was mixed to prevent liquids from running from the soil duringtransportation. The structure increased in diameter with depth to approximately 11 feetand the depth of the structure was approximately 8 feet below grade. The interior of thered brick structure was parged with concrete providing a smooth surface. The bottom ofthe structure appeared to be poured concrete. Cast into the top portion of the structurewas a wooden barrel filled with sand. In addition, several one-inch diameter lead pipeswith perforated ends were found inside the structure as were at least 50 old bottles. Wesuspected that the structure was a former cistern and the wooden barrel containing sandwas an inlet sediment filter for rainwater migrating into the structure.
The test pit that was excavated adjacent to the outside of the structure wassampled at a depth of approximately 8 feet. The sample was submitted to AMROlaboratories for analysis for volatile organic compounds via EPA Method 802 lB. Resultsof analysis did not identify any compounds greater than the laboratory reporting limit forthe compounds tested. The structure was backfilled with fill as per the instructions of theproject engineer. Redevelopment of the property included construction of a parking lot.A catch basin structure with a monolithic base was proposed to be installed adjacent tothe brick structure.
Considering the results of analysis of post-excavation samples of LBG does notrecommend any further environmental work related to this discovery. We recommendsubmitting this letter report to Ms. Wuestenberg and request that the site be closed withno further action. Photographs of the relic structure during excavation are included asAttachment 2.
If you have many questions regarding this report and our findings please feel freeto contact our office.
Sincerely,Leggette, Brashears & Graham, Inc.
I R. DiegoSenior Associate
Attachments
Leggette, Brashears & Graham, Inc.
FIGURES
LEGGETTE, BRASHEARS & GRAHAM, INC.
0
SITE LOCATION MAP
NAMCO PARKING LOT
FIGURE:CHECKED BY:
PREPARED BY:
WINDSOR, VERMONT
LEGGETTE, BRASHEARS & GRAHAM, INC.Professional Groundwater and Environmental Services
76 Pearl Street, Suite 203
Essex Junction, VT 05452
(802) 288-9600
FILE: DRAWN BY:Q:\WINDSOR DDR
L
GB
DATE: 11/05/091JRD
UNION STREET
NAMCO
COPYRIGHT (C) 2006, MAPTECH, INC. (978) 792-1000
SOURCE: United States Geological Survey 7.5 Minute Topographic
Map for the Mt. Ascutney, VT Quadrangle
FEETSCALE IN
1,000
PARKING
LOT
0
SITE LOCATION MAP
NAMCO PARKING LOT
FIGURE:CHECKED BY:
PREPARED BY:
WINDSOR, VERMONT
LEGGETTE, BRASHEARS & GRAHAM, INC.Professional Groundwater and Environmental Services
76 Pearl Street, Suite 203
Essex Junction, VT 05452
(802) 288-9600
FILE: DRAWN BY:Q:\WINDSOR DDR
L
GB
DATE: 11/05/091JRD
UNION STREET
NAMCO
COPYRIGHT (C) 2006, MAPTECH, INC. (978) 792-1000
SOURCE: United States Geological Survey 7.5 Minute Topographic
Map for the Mt. Ascutney, VT Quadrangle
FEETSCALE IN
1,000
PARKING
LOT
SITE SKETCH
NAMCO PARKING LOT
FIGURE:CHECKED BY:
PREPARED BY:
WINDSOR, VERMONT
LEGGETTE, BRASHEARS & GRAHAM, INC.Professional Groundwater and Environmental Services
76 Pearl Street, Suite 203
Essex Junction, VT 05452
(802) 288-9600
FILE: DRAWN BY:Q:\WINDSOR DDR
L
GB
DATE: 11/05/092JRD
UNION STREET
NAMCO
PARKING
LOT
NOT TO SCALE
LEGEND
TEST PIT LOCATION
DRAIN PIPE
TP-1
D
SITE SKETCH
NAMCO PARKING LOT
FIGURE:CHECKED BY:
PREPARED BY:
WINDSOR, VERMONT
LEGGETTE, BRASHEARS & GRAHAM, INC.Professional Groundwater and Environmental Services
76 Pearl Street, Suite 203
Essex Junction, VT 05452
(802) 288-9600
FILE: DRAWN BY:Q:\WINDSOR DDR
L
GB
DATE: 11/05/092JRD
UNION STREET
NAMCO
PARKING
LOT
NOT TO SCALE
LEGEND
TEST PIT LOCATION
DRAIN PIPE
TP-1
D
D
D
DDR
IVEWAY
NEW STORMWATER
CATCH BASIN
8' ID RED BRICK
STRUCTURE
FORMER
CONCRETE PAD
TP-5
TP-1
TP-2
TP-4
TP-3
UNION STREET
ATTACHMENT 1
LEGGETTE, BRASHEARS & GRAHAM, INC.
LEGGETTE, BRASHEARS & GRAHAM, INC.
ATTACHMENT 2
Site Photographs September 24, 2009
NAMCO Parking Lot 6 Union Street Windsor, VT
1. Initial excavation within old brick cistern.
2. Grey stained soil.
Site Photographs September 24, 2009
NAMCO Parking Lot 6 Union Street Windsor, VT
3. Hot water bottle retrieved from excavation within old cistern.
4. Temporary soil stockpile.
Site Photographs September 24, 2009
NAMCO Parking Lot 6 Union Street Windsor, VT
5. Sand and gravel from Test Pit 5.
6. Exterior of old brick cistern.
Site Photographs October 1, 2009
NAMCO Parking Lot 6 Union Street Windsor, VT
7. Excavating soil from old cistern.
Wooden barrel
8. Excavating soil from old cistern with wooden barrel sand filter.
Site Photographs October 1, 2009
NAMCO Parking Lot 6 Union Street Windsor, VT
9. Excavating soil from old cistern.
10. Bottles retrieved from excavation.
Site Photographs October 1, 2009
NAMCO Parking Lot 6 Union Street Windsor, VT
11. Lead pipe with holes.
12. Cleaning base of cistern structure.
