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Home My WebLink AboutWS-2446_3355_CA_O_20160322 March 22, 2016 North Carolina Department of Environmental Quality UST Section, Division of Waste Management Attention: Mike Rogers 585 Waughtown Street Winston Salem, NC 27107 RE: Public Notice Letters, Responses and Notice of Intent Three Boys Citgo (former Gant #31 Station) 5000 Old Walkertown Road Winston-Salem, NC Incident #3355, Facility # 0-016565 Dear Mr. Rogers: ENVIRON Engineers of North Carolina, PC (ENVIRON) is pleased to submit the above information, on behalf of the Gant Oil Company (Gant), documenting the completion of the Public Notification and Discharge Permit/Notice of Intent activities concerning the Corrective Action Plan (CAP) report prepared by ENVIRON and submitted on June 8, 2015, to the UST Section, Division of Waste Management in the North Carolina Department of Environmental Quality (NC DEQ). Attached are the public notice letters, certified return receipt cards and one response letter from the downgradient railroad property that requests notification, prior to CAP related work, on their property. Also included is a Notice of Intent to Construct or Operate Injection Wells as part of the remedial work being performed as a Small Scale Injection Process. If you need anything else or have any questions, please contact Bruce Tease at (413) 895-5896 Sincerely ENVIRON Engineers of North Carolina, PC __________________________ ________________________ Bruce Tease, PhD Russell S. Kemp, PE Senior Manager Vice President ENVIRON Engineers of North Carolina, PC 1600 Parkwood Circle, Suite 310, Atlanta, GA 30339 V +1 770.874.5010 F +1 770.874.5011 February 17, 2016 CERTIFIED MAIL (7015 3010 0002 2372 4485) RETURN RECEIPT REQUESTED Norfolk Southern Corporation Attn: Helen Hart 3 Commercial Place Norfolk, VA 23510 Subject: Notice of Request for Approval of a Corrective Action Plan Former Gant #31 Station (currently Three Boys CITGO) 5000 Old Walkertown Road, Winston-Salem, North Carolina Forsyth County Incident No. 3355 Dear Ms. Hart: This letter is being submitted on behalf of Gant Oil Company, Inc. (Gant) by ENVIRON Engineers of North Carolina, PC to inform you that a Corrective Action Plan (CAP) has been submitted to the NC Division of Waste Management (DWM), as noted in their letter dated November 4, 2015 (see attached) for the cleanup of a release from a petroleum underground storage tank (UST) system located at the above referenced site. Since your property, at Old Walkertown Road, appears to be located downgradient of the referenced site, with respect to groundwater flow direction, State rules governing groundwater classifications and standards (15A NCAC 2L .0400) require that we notify you of the approved CAP activities. ENVIRON Engineers of North Carolina, PC, on behalf of the responsible party Gant Oil Company, Inc. is providing notice of the Corrective Action Plan that proposes: To cleanup soil contamination to the extent possible beneath diesel fuel and kerosene USTs; To cleanup groundwater contamination through the recovery of free phase oil; and To use natural processes of degradation and attenuation as a method to cleanup residual groundwater contamination. The source area of the contamination is located at 5000 Old Walkertown Road in Winston-Salem, NC at the northeast corner of the intersection of Old Walkertown Road and Davis Road. Your Old Walkertown Road property is located downgradient of the source area property with respect to groundwater flow, which occurs in a southeasterly direction, as depicted on Figure 1. The CAP involves the following activities: 1. Removal of two (2) 4,000 gallon petroleum USTs (kerosene and diesel fuel) including their associated fuel dispenser island, piping and canopy; 2. Excavation of the majority of petroleum impacted soils beneath the UST pit to a depth of approximately 20 feet below grade; 3. Installation of surfactant injection and free product extraction wells to facilitate the recovery of free phase oil and impacted groundwater via enhanced vacuum extractions; 4. Injection of surfactant (Biosolve) to desorb oil from soil into groundwater to permit its recovery via enhanced vacuum extractions; and 5. Allow natural processes of degradation to clean up residually impacted groundwater. Investigations performed to date have demonstrated that the extent of the free phase oil is limited to the UST area, based on weekly to monthly well gauging and free product recovery via hand bailing. Groundwater flow was determined to be in a southeasterly direction towards a railroad right-of-way and a large paved parking lot used by the railroad for the on- and off-loading of vehicles transported via freight cars. Sensitive environmental receptors do not exist in the subject area that would be at risk from this release. - 2 - While municipal drinking water is provided throughout the subject area, approximately six properties are located upgradient to the west and/or crossgradient to the south of the release area where residents may continue to utilize groundwater as a potable water source. While private drinking water wells are not located downgradient of the source area with respect to groundwater flow direction, the CAP is being implemented to reduce potential risk by removing the main source of oil in soil and groundwater from the source area (i.e. diesel fuel and kerosene USTs). Natural attenuation of residual contaminants is expected to continue after the CAP activities have achieved the removal of free phase oil to further assure the protection of public health and the environment. If you would like to examine the CAP, the DWM UST Section has the CAP along with other site information on file and available for public review. You may make copies of this information for a small fee, if you so desire. Any written comments concerning the CAP should be submitted to the following address within thirty (30) days of the date that this letter was issued: Michael Rogers, Hydrogeologist Division of Waste Management, UST Section 450 West Hanes Mill Road, Suite 300 Winston Salem, NC 27105 336-776-9685 All comments received within this time frame will be considered and a public meeting may be held should the Department find a significant degree of public interest in the proposed activities. The state approved CAP will go forward as planned provided no substantive comments or objections are received from the public within this period. Michael Rogers may be contacted during normal weekday business hours to answer questions or to arrange an appointment to review the information on file pertaining to the release. Public notification of the CAP is also being made by certified mail to Marlon B. Hunter, Director of the Forsyth County Department of Public Health; Allen Joines, Mayor; David R. Plyler, Chairman of the Forsyth County Board of Commissioners; J. Dudley Watts, Jr., County Manager; Lee Garrity, City Manager, and other property owners and occupants within the jurisdiction of the source area of the release. Sincerely, Bruce Tease, PhD Russell S. Kemp, PE Senior Manager President Attachments: Figure 1: Site plan showing source area of release and location of your property NC DWM DEQ CAP Approval Letter, November 4, 2015 OLD WALKERTOWN RD LASLEY DRDO R IS S TNORTHWOODS CRDAVIS RDLAMPAN LN WANDA WY WESTMORELAND ST FIGURE1 33-30865GDocument Path: P:\ArcGIS\Chartis-Gant\arcproj\Property Figures_1_2016.mxdDate: 1/18/16 AGK Old Walkertown Road (Yellow) Location Relative toSource Area of Release: Former Gant #31 Station (Red)5000 Old Walkertown RoadWinston-Salem, North Carolina Ü 0 0.05 0.10.025 MilesService Layer Credits: Source: Esri,DigitalGlobe, GeoEye, Earthstar Geographics,CNES/Airbus DS, USDA, USGS, AEX,Getmapping, Aerogrid, IGN, IGP, swisstopo,and the GIS User Community Legend Groundwater Contour Groundwater Flow Direction Dissolved Phase Oil Plume Free Phase Oil Plume Former Gant # 31 Station Boundary Old Walkertown Road 500 ug/L Total EPH 1,000 ug/L Total EPH ENVIRON Engineers of North Carolina, PC 1600 Parkwood Circle, Suite 310, Atlanta, GA 30339 V +1 770.874.5010 F +1 770.874.5011 February 17, 2016 CERTIFIED MAIL (7015 3010 0002 2372 4478) RETURN RECEIPT REQUESTED Norfolk Southern Corporation Attn: Helen Hart 3 Commercial Place Norfolk, VA 23510 Subject: Notice of Request for Approval of a Corrective Action Plan Former Gant #31 Station (currently Three Boys CITGO) 5000 Old Walkertown Road, Winston-Salem, North Carolina Forsyth County Incident No. 3355 Dear Ms. Hart: This letter is being submitted on behalf of Gant Oil Company, Inc. (Gant) by ENVIRON Engineers of North Carolina, PC to inform you that a Corrective Action Plan (CAP) has been submitted to the NC Division of Waste Management (DWM), as noted in their letter dated November 4, 2015 (see attached) for the cleanup of a release from a petroleum underground storage tank (UST) system located at the above referenced site. Since your property, at 5035 Old Walkertown Road, appears to be located downgradient of the referenced site, with respect to groundwater flow direction, State rules governing groundwater classifications and standards (15A NCAC 2L .0400) require that we notify you of the approved CAP activities. ENVIRON Engineers of North Carolina, PC, on behalf of the responsible party Gant Oil Company, Inc. is providing notice of the Corrective Action Plan that proposes: To cleanup soil contamination to the extent possible beneath diesel fuel and kerosene USTs; To cleanup groundwater contamination through the recovery of free phase oil; and To use natural processes of degradation and attenuation as a method to cleanup residual groundwater contamination. The source area of the contamination is located at 5000 Old Walkertown Road in Winston-Salem, NC at the northeast corner of the intersection of Old Walkertown Road and Davis Road. Your 5035 Old Walkertown Road property is located downgradient of the source area property with respect to groundwater flow, which occurs in a southeasterly direction, as depicted on Figure 1. The CAP involves the following activities: 1. Removal of two (2) 4,000 gallon petroleum USTs (kerosene and diesel fuel) including their associated fuel dispenser island, piping and canopy; 2. Excavation of the majority of petroleum impacted soils beneath the UST pit to a depth of approximately 20 feet below grade; 3. Installation of surfactant injection and free product extraction wells to facilitate the recovery of free phase oil and impacted groundwater via enhanced vacuum extractions; 4. Injection of surfactant (Biosolve) to desorb oil from soil into groundwater to permit its recovery via enhanced vacuum extractions; and 5. Allow natural processes of degradation to clean up residually impacted groundwater. Investigations performed to date have demonstrated that the extent of the free phase oil is limited to the UST area, based on weekly to monthly well gauging and free product recovery via hand bailing. Groundwater flow was determined to be in a southeasterly direction towards a railroad right-of-way and a large paved parking lot used by the railroad for the on- and off-loading of vehicles transported via freight cars. Sensitive environmental receptors do not exist in the subject area that would be at risk from this release. - 2 - While municipal drinking water is provided throughout the subject area, approximately six properties are located upgradient to the west and/or crossgradient to the south of the release area where residents may continue to utilize groundwater as a potable water source. While private drinking water wells are not located downgradient of the source area with respect to groundwater flow direction, the CAP is being implemented to reduce potential risk by removing the main source of oil in soil and groundwater from the source area (i.e. diesel fuel and kerosene USTs). Natural attenuation of residual contaminants is expected to continue after the CAP activities have achieved the removal of free phase oil to further assure the protection of public health and the environment. If you would like to examine the CAP, the DWM UST Section has the CAP along with other site information on file and available for public review. You may make copies of this information for a small fee, if you so desire. Any written comments concerning the CAP should be submitted to the following address within thirty (30) days of the date that this letter was issued: Michael Rogers, Hydrogeologist Division of Waste Management, UST Section 450 West Hanes Mill Road, Suite 300 Winston Salem, NC 27105 336-776-9685 All comments received within this time frame will be considered and a public meeting may be held should the Department find a significant degree of public interest in the proposed activities. The state approved CAP will go forward as planned provided no substantive comments or objections are received from the public within this period. Michael Rogers may be contacted during normal weekday business hours to answer questions or to arrange an appointment to review the information on file pertaining to the release. Public notification of the CAP is also being made by certified mail to Marlon B. Hunter, Director of the Forsyth County Department of Public Health; Allen Joines, Mayor; David R. Plyler, Chairman of the Forsyth County Board of Commissioners; J. Dudley Watts, Jr., County Manager; Lee Garrity, City Manager, and other property owners and occupants within the jurisdiction of the source area of the release. Sincerely, Bruce Tease, PhD Russell S. Kemp, PE Senior Manager President Attachments: Figure 1: Site plan showing source area of release and location of your property NC DWM DEQ CAP Approval Letter, November 4, 2015 OLD WALKERTOWN RD LASLEY DROAK RIDGE DRDORIS STPERRY STDAVIS RDNORT H W O O D S C R LAMPAN LN WANDA WY DIPPEN RDDORIS ST FIGURE1 33-30865GDocument Path: P:\ArcGIS\Chartis-Gant\arcproj\Property Figures_1_2016.mxdDate: 1/18/16 AGK 5035 Old Walkertown Road (Yellow) Location Relative toSource Area of Release: Former Gant #31 Station (Red)5000 Old Walkertown RoadWinston-Salem, North Carolina Ü 0 0.06 0.120.03 Miles Service Layer Credits: Source: Esri,DigitalGlobe, GeoEye, Earthstar Geographics,CNES/Airbus DS, USDA, USGS, AEX,Getmapping, Aerogrid, IGN, IGP, swisstopo,and the GIS User Community Legend Groundwater Contour Groundwater Flow Direction Dissolved Phase Oil Plume Free Phase Oil Plume Former Gant # 31 Station Boundary 5035 Old Walkertown Road 500 ug/L Total EPH 1,000 ug/L Total EPH ENVIRON Engineers of North Carolina, PC 1600 Parkwood Circle, Suite 310, Atlanta, GA 30339 V +1 770.874.5010 F +1 770.874.5011 January 20, 2016 CERTIFIED MAIL (7015 3010 0002 2372 4379) RETURN RECEIPT REQUESTED Gus and E V E Corp. 1405 Glen Oaks Road Clemmons, NC 27012 Subject: Notice of Request for Approval of a Corrective Action Plan Former Gant #831 Station (currently Three Boys CITGO) 5000 Old Walkertown Road, Winston-Salem, North Carolina Forsyth County Incident No. 3355 Dear Gus and E V E Corp.: This letter is being submitted on behalf of Gant Oil Company, Inc. (Gant) by ENVIRON Engineers of North Carolina, PC to inform you that a Corrective Action Plan (CAP) has been submitted to the NC Division of Waste Management (DWM), as noted in their letter dated November 4, 2015 (see attached) for the cleanup of a release from a petroleum underground storage tank (UST) system located at the above referenced site. Since your property, at 5008 Old Walkertown Road, is located contiguous to the referenced site, State rules governing groundwater classifications and standards (15A NCAC 2L .0400) require that we notify you of the approved CAP activities. ENVIRON Engineers of North Carolina, PC, on behalf of the responsible party Gant Oil Company, Inc. is providing notice of the Corrective Action Plan that proposes: To cleanup soil contamination to the extent possible beneath diesel fuel and kerosene USTs; To cleanup groundwater contamination through the recovery of free phase oil; and To use natural processes of degradation and attenuation as a method to cleanup residual groundwater contamination. The source area of the contamination is located at 5000 Old Walkertown Road in Winston-Salem, NC at the northeast corner of the intersection of Old Walkertown Road and Davis Road. Your 5008 Old Walkertown Road property is located to the east and crossgradient of the source area property with respect to groundwater flow, which occurs in a southeasterly direction, as depicted on Figure 1. The CAP involves the following activities: 1. Removal of two (2) 4,000 gallon petroleum USTs (kerosene and diesel fuel) including their associated fuel dispenser island, piping and canopy; 2. Excavation of the majority of petroleum impacted soils beneath the UST pit to a depth of approximately 20 feet below grade; 3. Installation of surfactant injection and free product extraction wells to facilitate the recovery of free phase oil and impacted groundwater via enhanced vacuum extractions; 4. Injection of surfactant (Biosolve) to desorb oil from soil into groundwater to permit its recovery via enhanced vacuum extractions; and 5. Allow natural processes of degradation to clean up residually impacted groundwater. Investigations performed to date have demonstrated that the extent of the free phase oil is limited to the UST area, based on weekly to monthly well gauging and free product recovery via hand bailing. Groundwater flow was determined to be in a southeasterly direction towards a railroad right-of-way and a large paved parking lot used by the railroad for the on- and off-loading of vehicles transported via freight cars. Sensitive environmental receptors do not exist in the subject area that would be at risk from this release. - 2 - While municipal drinking water is provided throughout the subject area, approximately six properties are located upgradient to the west and/or crossgradient to the south of the release area where residents may continue to utilize groundwater as a potable water source. While private drinking water wells are not located downgradient of the source area with respect to groundwater flow direction, the CAP is being implemented to reduce potential risk by removing the main source of oil in soil and groundwater from the source area (i.e. diesel fuel and kerosene USTs). Natural attenuation of residual contaminants is expected to continue after the CAP activities have achieved the removal of free phase oil to further assure the protection of public health and the environment. If you would like to examine the CAP, the DWM UST Section has the CAP along with other site information on file and available for public review. You may make copies of this information for a small fee, if you so desire. Any written comments concerning the CAP should be submitted to the following address within thirty (30) days of the date that this letter was issued: Michael Rogers, Hydrogeologist Division of Waste Management, UST Section 450 West Hanes Mill Road, Suite 300 Winston Salem, NC 27105 336-776-9685 All comments received within this time frame will be considered and a public meeting may be held should the Department find a significant degree of public interest in the proposed activities. The state approved CAP will go forward as planned provided no substantive comments or objections are received from the public within this period. Michael Rogers may be contacted during normal weekday business hours to answer questions or to arrange an appointment to review the information on file pertaining to the release. Public notification of the CAP is also being made by certified mail to Marlon B. Hunter, Director of the Forsyth County Department of Public Health; Allen Joines, Mayor; David R. Plyler, Chairman of the Forsyth County Board of Commissioners; J. Dudley Watts, Jr., County Manager; Lee Garrity, City Manager, and other property owners and occupants within the jurisdiction of the source area of the release. Sincerely, Bruce Tease, PhD Russell S. Kemp, PE Senior Manager President Attachments: Figure 1: Site plan showing source area of release and location of your property NC DWM DEQ CAP Approval Letter, November 4, 2015 DAVIS RDOLD WALKERTOWN RD D O R IS STSCHOOL ST FIGURE1 33-30865GDocument Path: P:\ArcGIS\Chartis-Gant\arcproj\Property Figures_1_2016.mxdDate: 1/18/16 AGK 5008 Old Walkertown Road (Yellow) Location Relative toSource Area of Release: Former Gant #31 Station (Red)5000 Old Walkertown RoadWinston-Salem, North Carolina Ü 0 0.035 0.070.0175 MilesService Layer Credits: Source: Esri,DigitalGlobe, GeoEye, Earthstar Geographics,CNES/Airbus DS, USDA, USGS, AEX,Getmapping, Aerogrid, IGN, IGP, swisstopo,and the GIS User Community Legend Groundwater Contour Groundwater Flow Direction Dissolved Phase Oil Plume Free Phase Oil Plume Former Gant # 31 Station Boundary 5008 Old Walkertown Road 500 ug/L Total EPH 1,000 ug/L Total EPH ENVIRON Engineers of North Carolina, PC 1600 Parkwood Circle, Suite 310, Atlanta, GA 30339 V +1 770.874.5010 F +1 770.874.5011 January 20, 2016 CERTIFIED MAIL (7015 3010 0002 2372 4362) RETURN RECEIPT REQUESTED Ziad K. and Rania G. Wakim 3515 Meadow Glen Court Clemmons, NC 27012 Subject: Notice of Request for Approval of a Corrective Action Plan Former Gant #831 Station (currently Three Boys CITGO) 5000 Old Walkertown Road, Winston-Salem, North Carolina Forsyth County Incident No. 3355 Dear Ziad and Rania: This letter is being submitted on behalf of Gant Oil Company, Inc. (Gant) by ENVIRON Engineers of North Carolina, PC to inform you that a Corrective Action Plan (CAP) has been submitted to the NC Division of Waste Management (DWM), as noted in their letter dated November 4, 2015 (see attached) for the cleanup of a release from a petroleum underground storage tank (UST) system located at the above referenced site. Since your property, at 4980 Old Walkertown Road, is located contiguous to the referenced site, State rules governing groundwater classifications and standards (15A NCAC 2L .0400) require that we notify you of the approved CAP activities. ENVIRON Engineers of North Carolina, PC, on behalf of the responsible party Gant Oil Company, Inc. is providing notice of the Corrective Action Plan that proposes: To cleanup soil contamination to the extent possible beneath diesel fuel and kerosene USTs; To cleanup groundwater contamination through the recovery of free phase oil; and To use natural processes of degradation and attenuation as a method to cleanup residual groundwater contamination. The source area of the contamination is located at 5000 Old Walkertown Road in Winston-Salem, NC at the northeast corner of the intersection of Old Walkertown Road and Davis Road. Your 4980 Old Walkertown Road property is located contiguous to and upgradient of the source area property with respect to groundwater flow, which occurs in a southeasterly direction, as depicted on Figure 1. The CAP involves the following activities: 1. Removal of two (2) 4,000 gallon petroleum USTs (kerosene and diesel fuel) including their associated fuel dispenser island, piping and canopy; 2. Excavation of the majority of petroleum impacted soils beneath the UST pit to a depth of approximately 20 feet below grade; 3. Installation of surfactant injection and free product extraction wells to facilitate the recovery of free phase oil and impacted groundwater via enhanced vacuum extractions; 4. Injection of surfactant (Biosolve) to desorb oil from soil into groundwater to permit its recovery via enhanced vacuum extractions; and 5. Allow natural processes of degradation to clean up residually impacted groundwater. Investigations performed to date have demonstrated that the extent of the free phase oil is limited to the UST area, based on weekly to monthly well gauging and free product recovery via hand bailing. Groundwater flow was determined to be in a southeasterly direction towards a railroad right-of-way and a large paved parking lot used by the railroad for the on- and off-loading of vehicles transported via freight cars. Sensitive environmental receptors do not exist in the subject area that would be at risk from this release. - 2 - While municipal drinking water is provided throughout the subject area, approximately six properties are located upgradient to the west and/or crossgradient to the south of the release area where residents may continue to utilize groundwater as a potable water source. While private drinking water wells are not located downgradient of the source area with respect to groundwater flow direction, the CAP is being implemented to reduce potential risk by removing the main source of oil in soil and groundwater from the source area (i.e. diesel fuel and kerosene USTs). Natural attenuation of residual contaminants is expected to continue after the CAP activities have achieved the removal of free phase oil to further assure the protection of public health and the environment. If you would like to examine the CAP, the DWM UST Section has the CAP along with other site information on file and available for public review. You may make copies of this information for a small fee, if you so desire. Any written comments concerning the CAP should be submitted to the following address within thirty (30) days of the date that this letter was issued: Michael Rogers, Hydrogeologist Division of Waste Management, UST Section 450 West Hanes Mill Road, Suite 300 Winston Salem, NC 27105 336-776-9685 All comments received within this time frame will be considered and a public meeting may be held should the Department find a significant degree of public interest in the proposed activities. The state approved CAP will go forward as planned provided no substantive comments or objections are received from the public within this period. Michael Rogers may be contacted during normal weekday business hours to answer questions or to arrange an appointment to review the information on file pertaining to the release. Public notification of the CAP is also being made by certified mail to Marlon B. Hunter, Director of the Forsyth County Department of Public Health; Allen Joines, Mayor; David R. Plyler, Chairman of the Forsyth County Board of Commissioners; J. Dudley Watts, Jr., County Manager; Lee Garrity, City Manager, and other property owners and occupants within the jurisdiction of the source area of the release. Sincerely, Bruce Tease, PhD Russell S. Kemp, PE Senior Manager President Attachments: Figure 1: Site plan showing source area of release and location of your property NC DWM DEQ CAP Approval Letter, November 4, 2015 OLD WALKERTOWN RD D O R IS S TDAVIS RDLASLEY DRWANDA WY FIGURE1 33-30865GDocument Path: P:\ArcGIS\Chartis-Gant\arcproj\Property Figures_1_2016.mxdDate: 1/18/16 AGK 4980 Old Walkertown Road (Yellow) Location Relative toSource Area of Release: Former Gant #31 Station (Red)5000 Old Walkertown RoadWinston-Salem, North Carolina Ü 0 0.035 0.070.0175 MilesService Layer Credits: Source: Esri,DigitalGlobe, GeoEye, Earthstar Geographics,CNES/Airbus DS, USDA, USGS, AEX,Getmapping, Aerogrid, IGN, IGP, swisstopo,and the GIS User Community Legend Groundwater Contour Groundwater Flow Direction Dissolved Phase Oil Plume Free Phase Oil Plume Former Gant # 31 Station Boundary 4980 Old Walkertown Road 500 ug/L Total EPH 1,000 ug/L Total EPH ENVIRON Engineers of North Carolina, PC 1600 Parkwood Circle, Suite 310, Atlanta, GA 30339 V +1 770.874.5010 F +1 770.874.5011 January 20, 2016 CERTIFIED MAIL (7015 3010 0002 2372 4355) RETURN RECEIPT REQUESTED Thomas E.A. Adams 441 Wanda Way Winston-Salem, NC 27105 Subject: Notice of Request for Approval of a Corrective Action Plan Former Gant #831 Station (currently Three Boys CITGO) 5000 Old Walkertown Road, Winston-Salem, North Carolina Forsyth County Incident No. 3355 Dear Mr. Adams: This letter is being submitted on behalf of Gant Oil Company, Inc. (Gant) by ENVIRON Engineers of North Carolina, PC to inform you that a Corrective Action Plan (CAP) has been submitted to the NC Division of Waste Management (DWM), as noted in their letter dated November 4, 2015 (see attached) for the cleanup of a release from a petroleum underground storage tank (UST) system located at the above referenced site. Since your property, at 4950 Wanda Way, is located contiguous to the referenced site, State rules governing groundwater classifications and standards (15A NCAC 2L .0400) require that we notify you of the approved CAP activities. ENVIRON Engineers of North Carolina, PC, on behalf of the responsible party Gant Oil Company, Inc. is providing notice of the Corrective Action Plan that proposes: To cleanup soil contamination to the extent possible beneath diesel fuel and kerosene USTs; To cleanup groundwater contamination through the recovery of free phase oil; and To use natural processes of degradation and attenuation as a method to cleanup residual groundwater contamination. The source area of the contamination is located at 5000 Old Walkertown Road in Winston-Salem, NC at the northeast corner of the intersection of Old Walkertown Road and Davis Road. Your 4950 Wanda Way property is located contiguous to and crossgradient and/or potentially downgradient of the source area property with respect to groundwater flow, which occurs in a southeasterly direction, as depicted on Figure 1. The CAP involves the following activities: 1. Removal of two (2) 4,000 gallon petroleum USTs (kerosene and diesel fuel) including their associated fuel dispenser island, piping and canopy; 2. Excavation of the majority of petroleum impacted soils beneath the UST pit to a depth of approximately 20 feet below grade; 3. Installation of surfactant injection and free product extraction wells to facilitate the recovery of free phase oil and impacted groundwater via enhanced vacuum extractions; 4. Injection of surfactant (Biosolve) to desorb oil from soil into groundwater to permit its recovery via enhanced vacuum extractions; and 5. Allow natural processes of degradation to clean up residually impacted groundwater. Investigations performed to date have demonstrated that the extent of the free phase oil is limited to the UST area, based on weekly to monthly well gauging and free product recovery via hand bailing. Groundwater flow was determined to be in a southeasterly direction towards a railroad right-of-way and a large paved parking lot used by the railroad for the on- and off-loading of vehicles transported via freight cars. Sensitive environmental receptors do not exist in the subject area that would be at risk from this release. - 2 - While municipal drinking water is provided throughout the subject area, approximately six properties are located upgradient to the west and/or crossgradient to the south of the release area where residents may continue to utilize groundwater as a potable water source. While private drinking water wells are not located downgradient of the source area with respect to groundwater flow direction, the CAP is being implemented to reduce potential risk by removing the main source of oil in soil and groundwater from the source area (i.e. diesel fuel and kerosene USTs). Natural attenuation of residual contaminants is expected to continue after the CAP activities have achieved the removal of free phase oil to further assure the protection of public health and the environment. If you would like to examine the CAP, the DWM UST Section has the CAP along with other site information on file and available for public review. You may make copies of this information for a small fee, if you so desire. Any written comments concerning the CAP should be submitted to the following address within thirty (30) days of the date that this letter was issued: Michael Rogers, Hydrogeologist Division of Waste Management, UST Section 450 West Hanes Mill Road, Suite 300 Winston Salem, NC 27105 336-776-9685 All comments received within this time frame will be considered and a public meeting may be held should the Department find a significant degree of public interest in the proposed activities. The state approved CAP will go forward as planned provided no substantive comments or objections are received from the public within this period. Michael Rogers may be contacted during normal weekday business hours to answer questions or to arrange an appointment to review the information on file pertaining to the release. Public notification of the CAP is also being made by certified mail to Marlon B. Hunter, Director of the Forsyth County Department of Public Health; Allen Joines, Mayor; David R. Plyler, Chairman of the Forsyth County Board of Commissioners; J. Dudley Watts, Jr., County Manager; Lee Garrity, City Manager, and other property owners and occupants within the jurisdiction of the source area of the release. Sincerely, Bruce Tease, PhD Russell S. Kemp, PE Senior Manager President Attachments: Figure 1: Site plan showing source area of release and location of your property NC DWM DEQ CAP Approval Letter, November 4, 2015 OLD WALKERTOWN RD D O R IS S TDAVIS RDLASLEY DRWANDA WY FIGURE1 33-30865GDocument Path: P:\ArcGIS\Chartis-Gant\arcproj\Property Figures_1_2016.mxdDate: 1/18/16 AGK 4950 Wanda Way (Yellow) Location Relative toSource Area of Release: Former Gant #31 Station (Red)5000 Old Walkertown RoadWinston-Salem, North Carolina Ü 0 0.035 0.070.0175 MilesService Layer Credits: Source: Esri,DigitalGlobe, GeoEye, Earthstar Geographics,CNES/Airbus DS, USDA, USGS, AEX,Getmapping, Aerogrid, IGN, IGP, swisstopo,and the GIS User Community Legend Groundwater Contour Groundwater Flow Direction Dissolved Phase Oil Plume Free Phase Oil Plume Former Gant # 31 Station Boundary 4950 Wanda Way 500 ug/L Total EPH 1,000 ug/L Total EPH ENVIRON Engineers of North Carolina, PC 1600 Parkwood Circle, Suite 310, Atlanta, GA 30339 V +1 770.874.5010 F +1 770.874.5011 January 20, 2016 CERTIFIED MAIL (7015 3010 0002 2372 4348) RETURN RECEIPT REQUESTED Charles and Rhonda L. Capretta 4940 Wanda Way Winston-Salem, NC 27105 Subject: Notice of Request for Approval of a Corrective Action Plan Former Gant #831 Station (currently Three Boys CITGO) 5000 Old Walkertown Road, Winston-Salem, North Carolina Forsyth County Incident No. 3355 Dear Charles and Rhonda: This letter is being submitted on behalf of Gant Oil Company, Inc. (Gant) by ENVIRON Engineers of North Carolina, PC to inform you that a Corrective Action Plan (CAP) has been submitted to the NC Division of Waste Management (DWM), as noted in their letter dated November 4, 2015 (see attached) for the cleanup of a release from a petroleum underground storage tank (UST) system located at the above referenced site. Since your property, at 4940 Wanda Way, is located contiguous to the referenced site, State rules governing groundwater classifications and standards (15A NCAC 2L .0400) require that we notify you of the approved CAP activities. ENVIRON Engineers of North Carolina, PC, on behalf of the responsible party Gant Oil Company, Inc. is providing notice of the Corrective Action Plan that proposes: To cleanup soil contamination to the extent possible beneath diesel fuel and kerosene USTs; To cleanup groundwater contamination through the recovery of free phase oil; and To use natural processes of degradation and attenuation as a method to cleanup residual groundwater contamination. The source area of the contamination is located at 5000 Old Walkertown Road in Winston-Salem, NC at the northeast corner of the intersection of Old Walkertown Road and Davis Road. Your 4940 Wanda Way property is located contiguous to and crossgradient and/or potentially downgradient of the source area property with respect to groundwater flow, which occurs in a southeasterly direction, as depicted on Figure 1. The CAP involves the following activities: 1. Removal of two (2) 4,000 gallon petroleum USTs (kerosene and diesel fuel) including their associated fuel dispenser island, piping and canopy; 2. Excavation of the majority of petroleum impacted soils beneath the UST pit to a depth of approximately 20 feet below grade; 3. Installation of surfactant injection and free product extraction wells to facilitate the recovery of free phase oil and impacted groundwater via enhanced vacuum extractions; 4. Injection of surfactant (Biosolve) to desorb oil from soil into groundwater to permit its recovery via enhanced vacuum extractions; and 5. Allow natural processes of degradation to clean up residually impacted groundwater. Investigations performed to date have demonstrated that the extent of the free phase oil is limited to the UST area, based on weekly to monthly well gauging and free product recovery via hand bailing. Groundwater flow was determined to be in a southeasterly direction towards a railroad right-of-way and a large paved parking lot used by the railroad for the on- and off-loading of vehicles transported via freight cars. Sensitive environmental receptors do not exist in the subject area that would be at risk from this release. - 2 - While municipal drinking water is provided throughout the subject area, approximately six properties are located upgradient to the west and/or crossgradient to the south of the release area where residents may continue to utilize groundwater as a potable water source. While private drinking water wells are not located downgradient of the source area with respect to groundwater flow direction, the CAP is being implemented to reduce potential risk by removing the main source of oil in soil and groundwater from the source area (i.e. diesel fuel and kerosene USTs). Natural attenuation of residual contaminants is expected to continue after the CAP activities have achieved the removal of free phase oil to further assure the protection of public health and the environment. If you would like to examine the CAP, the DWM UST Section has the CAP along with other site information on file and available for public review. You may make copies of this information for a small fee, if you so desire. Any written comments concerning the CAP should be submitted to the following address within thirty (30) days of the date that this letter was issued: Michael Rogers, Hydrogeologist Division of Waste Management, UST Section 450 West Hanes Mill Road, Suite 300 Winston Salem, NC 27105 336-776-9685 All comments received within this time frame will be considered and a public meeting may be held should the Department find a significant degree of public interest in the proposed activities. The state approved CAP will go forward as planned provided no substantive comments or objections are received from the public within this period. Michael Rogers may be contacted during normal weekday business hours to answer questions or to arrange an appointment to review the information on file pertaining to the release. Public notification of the CAP is also being made by certified mail to Marlon B. Hunter, Director of the Forsyth County Department of Public Health; Allen Joines, Mayor; David R. Plyler, Chairman of the Forsyth County Board of Commissioners; J. Dudley Watts, Jr., County Manager; Lee Garrity, City Manager, and other property owners and occupants within the jurisdiction of the source area of the release. Sincerely, Bruce Tease, PhD Russell S. Kemp, PE Senior Manager President Attachments: Figure 1: Site plan showing source area of release and location of your property NC DWM DEQ CAP Approval Letter, November 4, 2015 OLD WALKERTOWN RD D O R IS S TDAVIS RDLASLEY DRWANDA WY FIGURE1 33-30865GDocument Path: P:\ArcGIS\Chartis-Gant\arcproj\Property Figures_1_2016.mxdDate: 1/18/16 AGK 4940 Wanda Way (Yellow) Location Relative toSource Area of Release: Former Gant #31 Station (Red)5000 Old Walkertown RoadWinston-Salem, North Carolina Ü 0 0.035 0.070.0175 MilesService Layer Credits: Source: Esri,DigitalGlobe, GeoEye, Earthstar Geographics,CNES/Airbus DS, USDA, USGS, AEX,Getmapping, Aerogrid, IGN, IGP, swisstopo,and the GIS User Community Legend Groundwater Contour Groundwater Flow Direction Dissolved Phase Oil Plume Free Phase Oil Plume Former Gant # 31 Station Boundary 4940 Wanda Way 500 ug/L Total EPH 1,000 ug/L Total EPH ENVIRON Engineers of North Carolina, PC 1600 Parkwood Circle, Suite 310, Atlanta, GA 30339 V +1 770.874.5010 F +1 770.874.5011 January 20, 2016 CERTIFIED MAIL (7015 3010 0002 2372 4331) RETURN RECEIPT REQUESTED Leander J. and Sally A. Person P.O. Box 248 Eagle Springs, NC 27242 Subject: Notice of Request for Approval of a Corrective Action Plan Former Gant #831 Station (currently Three Boys CITGO) 5000 Old Walkertown Road, Winston-Salem, North Carolina Forsyth County Incident No. 3355 Dear Leander and Sally: This letter is being submitted on behalf of Gant Oil Company, Inc. (Gant) by ENVIRON Engineers of North Carolina, PC to inform you that a Corrective Action Plan (CAP) has been submitted to the NC Division of Waste Management (DWM), as noted in their letter dated November 4, 2015 (see attached) for the cleanup of a release from a petroleum underground storage tank (UST) system located at the above referenced site. Since your property, at 4930 Wanda Way, is located contiguous to the referenced site, State rules governing groundwater classifications and standards (15A NCAC 2L .0400) require that we notify you of the approved CAP activities. ENVIRON Engineers of North Carolina, PC, on behalf of the responsible party Gant Oil Company, Inc. is providing notice of the Corrective Action Plan that proposes: To cleanup soil contamination to the extent possible beneath diesel fuel and kerosene USTs; To cleanup groundwater contamination through the recovery of free phase oil; and To use natural processes of degradation and attenuation as a method to cleanup residual groundwater contamination. The source area of the contamination is located at 5000 Old Walkertown Road in Winston-Salem, NC at the northeast corner of the intersection of Old Walkertown Road and Davis Road. Your 4930 Wanda Way property is located contiguous to and crossgradient and/or potentially downgradient of the source area property with respect to groundwater flow, which occurs in a southeasterly direction, as depicted on Figure 1. The CAP involves the following activities: 1. Removal of two (2) 4,000 gallon petroleum USTs (kerosene and diesel fuel) including their associated fuel dispenser island, piping and canopy; 2. Excavation of the majority of petroleum impacted soils beneath the UST pit to a depth of approximately 20 feet below grade; 3. Installation of surfactant injection and free product extraction wells to facilitate the recovery of free phase oil and impacted groundwater via enhanced vacuum extractions; 4. Injection of surfactant (Biosolve) to desorb oil from soil into groundwater to permit its recovery via enhanced vacuum extractions; and 5. Allow natural processes of degradation to clean up residually impacted groundwater. Investigations performed to date have demonstrated that the extent of the free phase oil is limited to the UST area, based on weekly to monthly well gauging and free product recovery via hand bailing. Groundwater flow was determined to be in a southeasterly direction towards a railroad right-of-way and a large paved parking lot used by the railroad for the on- and off-loading of vehicles transported via freight cars. Sensitive environmental receptors do not exist in the subject area that would be at risk from this release. - 2 - While municipal drinking water is provided throughout the subject area, approximately six properties are located upgradient to the west and/or crossgradient to the south of the release area where residents may continue to utilize groundwater as a potable water source. While private drinking water wells are not located downgradient of the source area with respect to groundwater flow direction, the CAP is being implemented to reduce potential risk by removing the main source of oil in soil and groundwater from the source area (i.e. diesel fuel and kerosene USTs). Natural attenuation of residual contaminants is expected to continue after the CAP activities have achieved the removal of free phase oil to further assure the protection of public health and the environment. If you would like to examine the CAP, the DWM UST Section has the CAP along with other site information on file and available for public review. You may make copies of this information for a small fee, if you so desire. Any written comments concerning the CAP should be submitted to the following address within thirty (30) days of the date that this letter was issued: Michael Rogers, Hydrogeologist Division of Waste Management, UST Section 450 West Hanes Mill Road, Suite 300 Winston Salem, NC 27105 336-776-9685 All comments received within this time frame will be considered and a public meeting may be held should the Department find a significant degree of public interest in the proposed activities. The state approved CAP will go forward as planned provided no substantive comments or objections are received from the public within this period. Michael Rogers may be contacted during normal weekday business hours to answer questions or to arrange an appointment to review the information on file pertaining to the release. Public notification of the CAP is also being made by certified mail to Marlon B. Hunter, Director of the Forsyth County Department of Public Health; Allen Joines, Mayor; David R. Plyler, Chairman of the Forsyth County Board of Commissioners; J. Dudley Watts, Jr., County Manager; Lee Garrity, City Manager, and other property owners and occupants within the jurisdiction of the source area of the release. Sincerely, Bruce Tease, PhD Russell S. Kemp, PE Senior Manager President Attachments: Figure 1: Site plan showing source area of release and location of your property NC DWM DEQ CAP Approval Letter, November 4, 2015 OLD WALKERTOWN RD D O R IS S TDAVIS RDLASLEY DRWANDA WY FIGURE1 33-30865GDocument Path: P:\ArcGIS\Chartis-Gant\arcproj\Property Figures_1_2016.mxdDate: 1/18/16 AGK 4930 Wanda Way (Yellow) Location Relative toSource Area of Release: Former Gant #31 Station (Red)5000 Old Walkertown RoadWinston-Salem, North Carolina Ü 0 0.035 0.070.0175 MilesService Layer Credits: Source: Esri,DigitalGlobe, GeoEye, Earthstar Geographics,CNES/Airbus DS, USDA, USGS, AEX,Getmapping, Aerogrid, IGN, IGP, swisstopo,and the GIS User Community Legend Groundwater Contour Groundwater Flow Direction Dissolved Phase Oil Plume Free Phase Oil Plume Former Gant # 31 Station Boundary 4930 Wanda Way 500 ug/L Total EPH 1,000 ug/L Total EPH ENVIRON Engineers of North Carolina, PC 1600 Parkwood Circle, Suite 310, Atlanta, GA 30339 V +1 770.874.5010 F +1 770.874.5011 January 20, 2016 CERTIFIED MAIL (7015 3010 0002 2372 4324) RETURN RECEIPT REQUESTED Ziad K. and Rania G. Wakim 3515 Meadow Glen Court Clemmons, NC 27012 Subject: Notice of Request for Approval of a Corrective Action Plan Former Gant #831 Station (currently Three Boys CITGO) 5000 Old Walkertown Road, Winston-Salem, North Carolina Forsyth County Incident No. 3355 Dear Ziad and Rania: This letter is being submitted on behalf of Gant Oil Company, Inc. (Gant) by ENVIRON Engineers of North Carolina, PC to inform you that a Corrective Action Plan (CAP) has been submitted to the NC Division of Waste Management (DWM), as noted in their letter dated November 4, 2015 (see attached) for the cleanup of a release from a petroleum underground storage tank (UST) system located at the above referenced site. Since your property, at 4706 Davis Road, is located contiguous to the referenced site, State rules governing groundwater classifications and standards (15A NCAC 2L .0400) require that we notify you of the approved CAP activities. ENVIRON Engineers of North Carolina, PC, on behalf of the responsible party Gant Oil Company, Inc. is providing notice of the Corrective Action Plan that proposes: To cleanup soil contamination to the extent possible beneath diesel fuel and kerosene USTs; To cleanup groundwater contamination through the recovery of free phase oil; and To use natural processes of degradation and attenuation as a method to cleanup residual groundwater contamination. The source area of the contamination is located at 5000 Old Walkertown Road in Winston-Salem, NC at the northeast corner of the intersection of Old Walkertown Road and Davis Road. Your 4706 Davis Road property is located upgradient of the source area property with respect to groundwater flow, which occurs in a southeasterly direction, as depicted on Figure 1. The CAP involves the following activities: 1. Removal of two (2) 4,000 gallon petroleum USTs (kerosene and diesel fuel) including their associated fuel dispenser island, piping and canopy; 2. Excavation of the majority of petroleum impacted soils beneath the UST pit to a depth of approximately 20 feet below grade; 3. Installation of surfactant injection and free product extraction wells to facilitate the recovery of free phase oil and impacted groundwater via enhanced vacuum extractions; 4. Injection of surfactant (Biosolve) to desorb oil from soil into groundwater to permit its recovery via enhanced vacuum extractions; and 5. Allow natural processes of degradation to clean up residually impacted groundwater. Investigations performed to date have demonstrated that the extent of the free phase oil is limited to the UST area, based on weekly to monthly well gauging and free product recovery via hand bailing. Groundwater flow was determined to be in a southeasterly direction towards a railroad right-of-way and a large paved parking lot used by the railroad for the on- and off-loading of vehicles transported via freight cars. Sensitive environmental receptors do not exist in the subject area that would be at risk from this release. - 2 - While municipal drinking water is provided throughout the subject area, approximately six properties are located upgradient to the west and/or crossgradient to the south of the release area where residents may continue to utilize groundwater as a potable water source. While private drinking water wells are not located downgradient of the source area with respect to groundwater flow direction, the CAP is being implemented to reduce potential risk by removing the main source of oil in soil and groundwater from the source area (i.e. diesel fuel and kerosene USTs). Natural attenuation of residual contaminants is expected to continue after the CAP activities have achieved the removal of free phase oil to further assure the protection of public health and the environment. If you would like to examine the CAP, the DWM UST Section has the CAP along with other site information on file and available for public review. You may make copies of this information for a small fee, if you so desire. Any written comments concerning the CAP should be submitted to the following address within thirty (30) days of the date that this letter was issued: Michael Rogers, Hydrogeologist Division of Waste Management, UST Section 450 West Hanes Mill Road, Suite 300 Winston Salem, NC 27105 336-776-9685 All comments received within this time frame will be considered and a public meeting may be held should the Department find a significant degree of public interest in the proposed activities. The state approved CAP will go forward as planned provided no substantive comments or objections are received from the public within this period. Michael Rogers may be contacted during normal weekday business hours to answer questions or to arrange an appointment to review the information on file pertaining to the release. Public notification of the CAP is also being made by certified mail to Marlon B. Hunter, Director of the Forsyth County Department of Public Health; Allen Joines, Mayor; David R. Plyler, Chairman of the Forsyth County Board of Commissioners; J. Dudley Watts, Jr., County Manager; Lee Garrity, City Manager, and other property owners and occupants within the jurisdiction of the source area of the release. Sincerely, Bruce Tease, PhD Russell S. Kemp, PE Senior Manager President Attachments: Figure 1: Site plan showing source area of release and location of your property NC DWM DEQ CAP Approval Letter, November 4, 2015 OLD WALKERTOWN RD D O R IS S TDAVIS RDLASLEY DRWANDA WY FIGURE1 33-30865GDocument Path: P:\ArcGIS\Chartis-Gant\arcproj\Property Figures_1_2016.mxdDate: 1/18/16 AGK 4706 Davis Road (Yellow) Location Relative toSource Area of Release: Former Gant #31 Station (Red)5000 Old Walkertown RoadWinston-Salem, North Carolina Ü 0 0.035 0.070.0175 MilesService Layer Credits: Source: Esri,DigitalGlobe, GeoEye, Earthstar Geographics,CNES/Airbus DS, USDA, USGS, AEX,Getmapping, Aerogrid, IGN, IGP, swisstopo,and the GIS User Community Legend Groundwater Contour Groundwater Flow Direction Dissolved Phase Oil Plume Free Phase Oil Plume Former Gant # 31 Station Boundary 4706 Davis Road 500 ug/L Total EPH 1,000 ug/L Total EPH ENVIRON Engineers of North Carolina, PC 1600 Parkwood Circle, Suite 310, Atlanta, GA 30339 V +1 770.874.5010 F +1 770.874.5011 January 20, 2016 CERTIFIED MAIL (7015 3010 0002 2372 4317) RETURN RECEIPT REQUESTED Ziad K. and Rania G. Wakim 3515 Meadow Glen Court Clemmons, NC 27012 Subject: Notice of Request for Approval of a Corrective Action Plan Former Gant #831 Station (currently Three Boys CITGO) 5000 Old Walkertown Road, Winston-Salem, North Carolina Forsyth County Incident No. 3355 Dear Ziad and Rania: This letter is being submitted on behalf of Gant Oil Company, Inc. (Gant) by ENVIRON Engineers of North Carolina, PC to inform you that a Corrective Action Plan (CAP) has been submitted to the NC Division of Waste Management (DWM), as noted in their letter dated November 4, 2015 (see attached) for the cleanup of a release from a petroleum underground storage tank (UST) system located at the above referenced site. Since your property, at 4700 Davis Road, is located contiguous to the referenced site, State rules governing groundwater classifications and standards (15A NCAC 2L .0400) require that we notify you of the approved CAP activities. ENVIRON Engineers of North Carolina, PC, on behalf of the responsible party Gant Oil Company, Inc. is providing notice of the Corrective Action Plan that proposes: To cleanup soil contamination to the extent possible beneath diesel fuel and kerosene USTs; To cleanup groundwater contamination through the recovery of free phase oil; and To use natural processes of degradation and attenuation as a method to cleanup residual groundwater contamination. The source area of the contamination is located at 5000 Old Walkertown Road in Winston-Salem, NC at the northeast corner of the intersection of Old Walkertown Road and Davis Road. Your 4700 Davis Road property is located upgradient of the source area property with respect to groundwater flow, which occurs in a southeasterly direction, as depicted on Figure 1. The CAP involves the following activities: 1. Removal of two (2) 4,000 gallon petroleum USTs (kerosene and diesel fuel) including their associated fuel dispenser island, piping and canopy; 2. Excavation of the majority of petroleum impacted soils beneath the UST pit to a depth of approximately 20 feet below grade; 3. Installation of surfactant injection and free product extraction wells to facilitate the recovery of free phase oil and impacted groundwater via enhanced vacuum extractions; 4. Injection of surfactant (Biosolve) to desorb oil from soil into groundwater to permit its recovery via enhanced vacuum extractions; and 5. Allow natural processes of degradation to clean up residually impacted groundwater. Investigations performed to date have demonstrated that the extent of the free phase oil is limited to the UST area, based on weekly to monthly well gauging and free product recovery via hand bailing. Groundwater flow was determined to be in a southeasterly direction towards a railroad right-of-way and a large paved parking lot used by the railroad for the on- and off-loading of vehicles transported via freight cars. Sensitive environmental receptors do not exist in the subject area that would be at risk from this release. - 2 - While municipal drinking water is provided throughout the subject area, approximately six properties are located upgradient to the west and/or crossgradient to the south of the release area where residents may continue to utilize groundwater as a potable water source. While private drinking water wells are not located downgradient of the source area with respect to groundwater flow direction, the CAP is being implemented to reduce potential risk by removing the main source of oil in soil and groundwater from the source area (i.e. diesel fuel and kerosene USTs). Natural attenuation of residual contaminants is expected to continue after the CAP activities have achieved the removal of free phase oil to further assure the protection of public health and the environment. If you would like to examine the CAP, the DWM UST Section has the CAP along with other site information on file and available for public review. You may make copies of this information for a small fee, if you so desire. Any written comments concerning the CAP should be submitted to the following address within thirty (30) days of the date that this letter was issued: Michael Rogers, Hydrogeologist Division of Waste Management, UST Section 450 West Hanes Mill Road, Suite 300 Winston Salem, NC 27105 336-776-9685 All comments received within this time frame will be considered and a public meeting may be held should the Department find a significant degree of public interest in the proposed activities. The state approved CAP will go forward as planned provided no substantive comments or objections are received from the public within this period. Michael Rogers may be contacted during normal weekday business hours to answer questions or to arrange an appointment to review the information on file pertaining to the release. Public notification of the CAP is also being made by certified mail to Marlon B. Hunter, Director of the Forsyth County Department of Public Health; Allen Joines, Mayor; David R. Plyler, Chairman of the Forsyth County Board of Commissioners; J. Dudley Watts, Jr., County Manager; Lee Garrity, City Manager, and other property owners and occupants within the jurisdiction of the source area of the release. Sincerely, Bruce Tease, PhD Russell S. Kemp, PE Senior Manager President Attachments: Figure 1: Site plan showing source area of release and location of your property NC DWM DEQ CAP Approval Letter, November 4, 2015 OLD WALKERTOWN RD D O R IS S TDAVIS RDLASLEY DRWANDA WY FIGURE1 33-30865GDocument Path: P:\ArcGIS\Chartis-Gant\arcproj\Property Figures_1_2016.mxdDate: 1/18/16 AGK 4700 Davis Road (Yellow) Location Relative toSource Area of Release: Former Gant #31 Station (Red)5000 Old Walkertown RoadWinston-Salem, North Carolina Ü 0 0.035 0.070.0175 MilesService Layer Credits: Source: Esri,DigitalGlobe, GeoEye, Earthstar Geographics,CNES/Airbus DS, USDA, USGS, AEX,Getmapping, Aerogrid, IGN, IGP, swisstopo,and the GIS User Community Legend Groundwater Contour Groundwater Flow Direction Dissolved Phase Oil Plume Free Phase Oil Plume Former Gant # 31 Station Boundary 4700 Davis Road 500 ug/L Total EPH 1,000 ug/L Total EPH ENVIRON Engineers of North Carolina, PC 1600 Parkwood Circle, Suite 310, Atlanta, GA 30339 V +1 770.874.5010 F +1 770.874.5011 January 20, 2016 CERTIFIED MAIL (7015 3010 0002 2372 4300) RETURN RECEIPT REQUESTED Winston-Salem/Forsyth County Board of Education P.O. Box 2513 Winston-Salem, NC 27102 Subject: Notice of Request for Approval of a Corrective Action Plan Former Gant #831 Station (currently Three Boys CITGO) 5000 Old Walkertown Road, Winston-Salem, North Carolina Forsyth County Incident No. 3355 Dear Board of Education: This letter is being submitted on behalf of Gant Oil Company, Inc. (Gant) by ENVIRON Engineers of North Carolina, PC to inform you that a Corrective Action Plan (CAP) has been submitted to the NC Division of Waste Management (DWM), as noted in their letter dated November 4, 2015 (see attached) for the cleanup of a release from a petroleum underground storage tank (UST) system located at the above referenced site. Since your property, at 2300 School Street, is located contiguous of the referenced site, State rules governing groundwater classifications and standards (15A NCAC 2L .0400) require that we notify you of the approved CAP activities. ENVIRON Engineers of North Carolina, PC, on behalf of the responsible party Gant Oil Company, Inc. is providing notice of the Corrective Action Plan that proposes: To cleanup soil contamination to the extent possible beneath diesel fuel and kerosene USTs; To cleanup groundwater contamination through the recovery of free phase oil; and To use natural processes of degradation and attenuation as a method to cleanup residual groundwater contamination. The source area of the contamination is located at 5000 Old Walkertown Road in Winston-Salem, NC at the northeast corner of the intersection of Old Walkertown Road and Davis Road. Your 2300 School Street property is located upgradient of the source area property with respect to groundwater flow, which occurs in a southeasterly direction, as depicted on Figure 1. The CAP involves the following activities: 1. Removal of two (2) 4,000 gallon petroleum USTs (kerosene and diesel fuel) including their associated fuel dispenser island, piping and canopy; 2. Excavation of the majority of petroleum impacted soils beneath the UST pit to a depth of approximately 20 feet below grade; 3. Installation of surfactant injection and free product extraction wells to facilitate the recovery of free phase oil and impacted groundwater via enhanced vacuum extractions; 4. Injection of surfactant (Biosolve) to desorb oil from soil into groundwater to permit its recovery via enhanced vacuum extractions; and 5. Allow natural processes of degradation to clean up residually impacted groundwater. Investigations performed to date have demonstrated that the extent of the free phase oil is limited to the UST area, based on weekly to monthly well gauging and free product recovery via hand bailing. Groundwater flow was determined to be in a southeasterly direction towards a railroad right-of-way and a large paved parking lot used by the railroad for the on- and off-loading of vehicles transported via freight cars. Sensitive environmental receptors do not exist in the subject area that would be at risk from this release. - 2 - While municipal drinking water is provided throughout the subject area, approximately six properties are located upgradient to the west and/or crossgradient to the south of the release area where residents may continue to utilize groundwater as a potable water source. While private drinking water wells are not located downgradient of the source area with respect to groundwater flow direction, the CAP is being implemented to reduce potential risk by removing the main source of oil in soil and groundwater from the source area (i.e. diesel fuel and kerosene USTs). Natural attenuation of residual contaminants is expected to continue after the CAP activities have achieved the removal of free phase oil to further assure the protection of public health and the environment. If you would like to examine the CAP, the DWM UST Section has the CAP along with other site information on file and available for public review. You may make copies of this information for a small fee, if you so desire. Any written comments concerning the CAP should be submitted to the following address within thirty (30) days of the date that this letter was issued: Michael Rogers, Hydrogeologist Division of Waste Management, UST Section 450 West Hanes Mill Road, Suite 300 Winston Salem, NC 27105 336-776-9685 All comments received within this time frame will be considered and a public meeting may be held should the Department find a significant degree of public interest in the proposed activities. The state approved CAP will go forward as planned provided no substantive comments or objections are received from the public within this period. Michael Rogers may be contacted during normal weekday business hours to answer questions or to arrange an appointment to review the information on file pertaining to the release. Public notification of the CAP is also being made by certified mail to Marlon B. Hunter, Director of the Forsyth County Department of Public Health; Allen Joines, Mayor; David R. Plyler, Chairman of the Forsyth County Board of Commissioners; J. Dudley Watts, Jr., County Manager; Lee Garrity, City Manager, and other property owners and occupants within the jurisdiction of the source area of the release. Sincerely, Bruce Tease, PhD Russell S. Kemp, PE Senior Manager President Attachments: Figure 1: Site plan showing source area of release and location of your property NC DWM DEQ CAP Approval Letter, November 4, 2015 DAVIS RDOLD WALKERTOWN RD D O R IS STSCHOOL ST FIGURE1 33-30865GDocument Path: P:\ArcGIS\Chartis-Gant\arcproj\Property Figures_1_2016.mxdDate: 1/18/16 AGK 2300 School Street (Yellow) Location Relative toSource Area of Release: Former Gant #31 Station (Red)5000 Old Walkertown RoadWinston-Salem, North Carolina Ü 0 0.035 0.070.0175 MilesService Layer Credits: Source: Esri,DigitalGlobe, GeoEye, Earthstar Geographics,CNES/Airbus DS, USDA, USGS, AEX,Getmapping, Aerogrid, IGN, IGP, swisstopo,and the GIS User Community Legend Groundwater Contour Groundwater Flow Direction Dissolved Phase Oil Plume Free Phase Oil Plume Former Gant # 31 Station Boundary 2300 School Street 500 ug/L Total EPH 1,000 ug/L Total EPH ENVIRON Engineers of North Carolina, PC 1600 Parkwood Circle, Suite 310, Atlanta, GA 30339 V +1 770.874.5010 F +1 770.874.5011 January 20, 2016 CERTIFIED MAIL (7015 3010 0002 2372 4393) RETURN RECEIPT REQUESTED Lee Garrity, City Manager P.O. Box 2511 Winston-Salem, NC 27102 Subject: Notice of Request for Approval of a Corrective Action Plan Former Gant #831 Station (currently Three Boys CITGO) 5000 Old Walkertown Road, Winston-Salem, North Carolina Forsyth County Incident No. 3355 Dear City Manager Garrity: This letter is being submitted on behalf of Gant Oil Company, Inc. (Gant) by ENVIRON Engineers of North Carolina, PC to inform you that a Corrective Action Plan (CAP) has been submitted to the NC Division of Waste Management (DWM), as noted in their letter dated November 4, 2015 (see attached) for the cleanup of a release from a petroleum underground storage tank (UST) system located at the above referenced site. State rules governing groundwater classifications and standards (15A NCAC 2L .0400) require that we notify you of the approved CAP activities, in addition to owners of property located contiguous to and/or downgradient of the source area site with respect to groundwater flow, which occurs in a southeasterly direction, as depicted on Figure 1. ENVIRON Engineers of North Carolina, PC, on behalf of the responsible party Gant Oil Company, Inc. is providing notice of the Corrective Action Plan that proposes: To cleanup soil contamination to the extent possible beneath diesel fuel and kerosene USTs; To cleanup groundwater contamination through the recovery of free phase oil; and To use natural processes of degradation and attenuation as a method to cleanup residual groundwater contamination. The source area of the contamination is located at 5000 Old Walkertown Road in Winston-Salem, NC at the northeast corner of the intersection of Old Walkertown Road and Davis Road. Groundwater flow occurs in a southeasterly direction, as depicted on Figure 1. The CAP involves the following activities: 1. Removal of two (2) 4,000 gallon petroleum USTs (kerosene and diesel fuel) including their associated fuel dispenser island, piping and canopy; 2. Excavation of the majority of petroleum impacted soils beneath the UST pit to a depth of approximately 20 feet below grade; 3. Installation of surfactant injection and free product extraction wells to facilitate the recovery of free phase oil and impacted groundwater via enhanced vacuum extractions; 4. Injection of surfactant (Biosolve) to desorb oil from soil into groundwater to permit its recovery via enhanced vacuum extractions; and 5. Allow natural processes of degradation to clean up residually impacted groundwater. Investigations performed to date have demonstrated that the extent of the free phase oil is limited to the UST area, based on weekly to monthly well gauging and free product recovery via hand bailing. Groundwater flow was determined to be in a southeasterly direction towards a railroad right-of-way and a large paved parking lot used by the railroad for the on- and off-loading of vehicles transported via freight cars. Sensitive environmental receptors do not exist in the subject area that would be at risk from this release. - 2 - While municipal drinking water is provided throughout the subject area, approximately six properties are located upgradient to the west and/or crossgradient to the south of the release area where residents may continue to utilize groundwater as a potable water source. While private drinking water wells are not located downgradient of the source area with respect to groundwater flow direction, the CAP is being implemented to reduce potential risk by removing the main source of oil in soil and groundwater from the source area (i.e. diesel fuel and kerosene USTs). Natural attenuation of residual contaminants is expected to continue after the CAP activities have achieved the removal of free phase oil to further assure the protection of public health and the environment. If you would like to examine the CAP, the DWM UST Section has the CAP along with other site information on file and available for public review. You may make copies of this information for a small fee, if you so desire. Any written comments concerning the CAP should be submitted to the following address within thirty (30) days of the date that this letter was issued: Michael Rogers, Hydrogeologist Division of Waste Management, UST Section 450 West Hanes Mill Road, Suite 300 Winston Salem, NC 27105 336-776-9685 All comments received within this time frame will be considered and a public meeting may be held should the Department find a significant degree of public interest in the proposed activities. The state approved CAP will go forward as planned provided no substantive comments or objections are received from the public within this period. Michael Rogers may be contacted during normal weekday business hours to answer questions or to arrange an appointment to review the information on file pertaining to the release. Public notification of the CAP is also being made by certified mail to Marlon B. Hunter, Director of the Forsyth County Department of Public Health; Allen Joines, Mayor; David R. Plyler, Chairman of the Forsyth County Board of Commissioners; J. Dudley Watts, Jr., County Manager; and other property owners and occupants within the jurisdiction of the source area of the release. Sincerely, Bruce Tease, PhD Russell S. Kemp, PE Senior Manager President Attachments: Figure 1: Site plan showing source area of release NC DWM DEQ CAP Approval Letter, November 4, 2015 OLD WALKERTOWN RDDAVIS RDD O R IS STSCHOOL ST LASLEY DRFIGURE1 33-30865GDocument Path: P:\ArcGIS\Chartis-Gant\arcproj\Property Figures_1_2016.mxdDate: 1/18/16 AGK Source Area of Release: Former Gant #31 Station (Red)5000 Old Walkertown RoadWinston-Salem, North Carolina Ü 0 0.025 0.050.0125 MilesService Layer Credits: Source: Esri,DigitalGlobe, GeoEye, Earthstar Geographics,CNES/Airbus DS, USDA, USGS, AEX,Getmapping, Aerogrid, IGN, IGP, swisstopo,and the GIS User Community Legend Groundwater Contour Groundwater Flow Direction Dissolved Phase Oil Plume Free Phase Oil Plume Former Gant # 31 Station Boundary 500 ug/L Total EPH 1,000 ug/L Total EPH ENVIRON Engineers of North Carolina, PC 1600 Parkwood Circle, Suite 310, Atlanta, GA 30339 V +1 770.874.5010 F +1 770.874.5011 January 20, 2016 CERTIFIED MAIL (7015 3010 0002 2372 4409) RETURN RECEIPT REQUESTED David R. Plyler, Chairman Forsyth County Board of Commissioners 201 North Chestnut Street Winston-Salem, NC 27101 Subject: Notice of Request for Approval of a Corrective Action Plan Former Gant #831 Station (currently Three Boys CITGO) 5000 Old Walkertown Road, Winston-Salem, North Carolina Forsyth County Incident No. 3355 Dear Chairman Plyler: This letter is being submitted on behalf of Gant Oil Company, Inc. (Gant) by ENVIRON Engineers of North Carolina, PC to inform you that a Corrective Action Plan (CAP) has been submitted to the NC Division of Waste Management (DWM), as noted in their letter dated November 4, 2015 (see attached) for the cleanup of a release from a petroleum underground storage tank (UST) system located at the above referenced site. State rules governing groundwater classifications and standards (15A NCAC 2L .0400) require that we notify you of the approved CAP activities, in addition to owners of property located contiguous to and/or downgradient of the source area site with respect to groundwater flow, which occurs in a southeasterly direction, as depicted on Figure 1. ENVIRON Engineers of North Carolina, PC, on behalf of the responsible party Gant Oil Company, Inc. is providing notice of the Corrective Action Plan that proposes: To cleanup soil contamination to the extent possible beneath diesel fuel and kerosene USTs; To cleanup groundwater contamination through the recovery of free phase oil; and To use natural processes of degradation and attenuation as a method to cleanup residual groundwater contamination. The source area of the contamination is located at 5000 Old Walkertown Road in Winston-Salem, NC at the northeast corner of the intersection of Old Walkertown Road and Davis Road. Groundwater flow occurs in a southeasterly direction, as depicted on Figure 1. The CAP involves the following activities: 1. Removal of two (2) 4,000 gallon petroleum USTs (kerosene and diesel fuel) including their associated fuel dispenser island, piping and canopy; 2. Excavation of the majority of petroleum impacted soils beneath the UST pit to a depth of approximately 20 feet below grade; 3. Installation of surfactant injection and free product extraction wells to facilitate the recovery of free phase oil and impacted groundwater via enhanced vacuum extractions; 4. Injection of surfactant (Biosolve) to desorb oil from soil into groundwater to permit its recovery via enhanced vacuum extractions; and 5. Allow natural processes of degradation to clean up residually impacted groundwater. Investigations performed to date have demonstrated that the extent of the free phase oil is limited to the UST area, based on weekly to monthly well gauging and free product recovery via hand bailing. Groundwater flow was determined to be in a southeasterly direction towards a railroad right-of-way and a large paved parking lot used by the railroad for the on- and off-loading of vehicles transported via freight cars. Sensitive environmental receptors do not exist in the subject area that would be at risk from this release. - 2 - While municipal drinking water is provided throughout the subject area, approximately six properties are located upgradient to the west and/or crossgradient to the south of the release area where residents may continue to utilize groundwater as a potable water source. While private drinking water wells are not located downgradient of the source area with respect to groundwater flow direction, the CAP is being implemented to reduce potential risk by removing the main source of oil in soil and groundwater from the source area (i.e. diesel fuel and kerosene USTs). Natural attenuation of residual contaminants is expected to continue after the CAP activities have achieved the removal of free phase oil to further assure the protection of public health and the environment. If you would like to examine the CAP, the DWM UST Section has the CAP along with other site information on file and available for public review. You may make copies of this information for a small fee, if you so desire. Any written comments concerning the CAP should be submitted to the following address within thirty (30) days of the date that this letter was issued: Michael Rogers, Hydrogeologist Division of Waste Management, UST Section 450 West Hanes Mill Road, Suite 300 Winston Salem, NC 27105 336-776-9685 All comments received within this time frame will be considered and a public meeting may be held should the Department find a significant degree of public interest in the proposed activities. The state approved CAP will go forward as planned provided no substantive comments or objections are received from the public within this period. Michael Rogers may be contacted during normal weekday business hours to answer questions or to arrange an appointment to review the information on file pertaining to the release. Public notification of the CAP is also being made by certified mail to Marlon B. Hunter, Director of the Forsyth County Department of Public Health; Allen Joines, Mayor; J. Dudley Watts, Jr., County Manager; Lee Garrity, City Manager; and other property owners and occupants within the jurisdiction of the source area of the release. Sincerely, Bruce Tease, PhD Russell S. Kemp, PE Senior Manager President Attachments: Figure 1: Site plan showing source area of release NC DWM DEQ CAP Approval Letter, November 4, 2015 OLD WALKERTOWN RDDAVIS RDD O R IS STSCHOOL ST LASLEY DRFIGURE1 33-30865GDocument Path: P:\ArcGIS\Chartis-Gant\arcproj\Property Figures_1_2016.mxdDate: 1/18/16 AGK Source Area of Release: Former Gant #31 Station (Red)5000 Old Walkertown RoadWinston-Salem, North Carolina Ü 0 0.025 0.050.0125 MilesService Layer Credits: Source: Esri,DigitalGlobe, GeoEye, Earthstar Geographics,CNES/Airbus DS, USDA, USGS, AEX,Getmapping, Aerogrid, IGN, IGP, swisstopo,and the GIS User Community Legend Groundwater Contour Groundwater Flow Direction Dissolved Phase Oil Plume Free Phase Oil Plume Former Gant # 31 Station Boundary 500 ug/L Total EPH 1,000 ug/L Total EPH ENVIRON Engineers of North Carolina, PC 1600 Parkwood Circle, Suite 310, Atlanta, GA 30339 V +1 770.874.5010 F +1 770.874.5011 January 20, 2016 CERTIFIED MAIL (7015 3010 0002 2372 4416) RETURN RECEIPT REQUESTED J. Dudley Watts Jr., County Manager 201 North Chestnut Street Winston-Salem, NC 27101 Subject: Notice of Request for Approval of a Corrective Action Plan Former Gant #831 Station (currently Three Boys CITGO) 5000 Old Walkertown Road, Winston-Salem, North Carolina Forsyth County Incident No. 3355 Dear County Manager Watts: This letter is being submitted on behalf of Gant Oil Company, Inc. (Gant) by ENVIRON Engineers of North Carolina, PC to inform you that a Corrective Action Plan (CAP) has been submitted to the NC Division of Waste Management (DWM), as noted in their letter dated November 4, 2015 (see attached) for the cleanup of a release from a petroleum underground storage tank (UST) system located at the above referenced site. State rules governing groundwater classifications and standards (15A NCAC 2L .0400) require that we notify you of the approved CAP activities, in addition to owners of property located contiguous to and/or downgradient of the source area site with respect to groundwater flow, which occurs in a southeasterly direction, as depicted on Figure 1. ENVIRON Engineers of North Carolina, PC, on behalf of the responsible party Gant Oil Company, Inc. is providing notice of the Corrective Action Plan that proposes: To cleanup soil contamination to the extent possible beneath diesel fuel and kerosene USTs; To cleanup groundwater contamination through the recovery of free phase oil; and To use natural processes of degradation and attenuation as a method to cleanup residual groundwater contamination. The source area of the contamination is located at 5000 Old Walkertown Road in Winston-Salem, NC at the northeast corner of the intersection of Old Walkertown Road and Davis Road. Groundwater flow occurs in a southeasterly direction, as depicted on Figure 1. The CAP involves the following activities: 1. Removal of two (2) 4,000 gallon petroleum USTs (kerosene and diesel fuel) including their associated fuel dispenser island, piping and canopy; 2. Excavation of the majority of petroleum impacted soils beneath the UST pit to a depth of approximately 20 feet below grade; 3. Installation of surfactant injection and free product extraction wells to facilitate the recovery of free phase oil and impacted groundwater via enhanced vacuum extractions; 4. Injection of surfactant (Biosolve) to desorb oil from soil into groundwater to permit its recovery via enhanced vacuum extractions; and 5. Allow natural processes of degradation to clean up residually impacted groundwater. Investigations performed to date have demonstrated that the extent of the free phase oil is limited to the UST area, based on weekly to monthly well gauging and free product recovery via hand bailing. Groundwater flow was determined to be in a southeasterly direction towards a railroad right-of-way and a large paved parking lot used by the railroad for the on- and off-loading of vehicles transported via freight cars. Sensitive environmental receptors do not exist in the subject area that would be at risk from this release. - 2 - While municipal drinking water is provided throughout the subject area, approximately six properties are located upgradient to the west and/or crossgradient to the south of the release area where residents may continue to utilize groundwater as a potable water source. While private drinking water wells are not located downgradient of the source area with respect to groundwater flow direction, the CAP is being implemented to reduce potential risk by removing the main source of oil in soil and groundwater from the source area (i.e. diesel fuel and kerosene USTs). Natural attenuation of residual contaminants is expected to continue after the CAP activities have achieved the removal of free phase oil to further assure the protection of public health and the environment. If you would like to examine the CAP, the DWM UST Section has the CAP along with other site information on file and available for public review. You may make copies of this information for a small fee, if you so desire. Any written comments concerning the CAP should be submitted to the following address within thirty (30) days of the date that this letter was issued: Michael Rogers, Hydrogeologist Division of Waste Management, UST Section 450 West Hanes Mill Road, Suite 300 Winston Salem, NC 27105 336-776-9685 All comments received within this time frame will be considered and a public meeting may be held should the Department find a significant degree of public interest in the proposed activities. The state approved CAP will go forward as planned provided no substantive comments or objections are received from the public within this period. Michael Rogers may be contacted during normal weekday business hours to answer questions or to arrange an appointment to review the information on file pertaining to the release. Public notification of the CAP is also being made by certified mail to Marlon B. Hunter, Director of the Forsyth County Department of Public Health; Allen Joines, Mayor; David R. Plyler, Chairman of the Forsyth County Board of Commissioners; Lee Garrity, City Manager; and other property owners and occupants within the jurisdiction of the source area of the release. Sincerely, Bruce Tease, PhD Russell S. Kemp, PE Senior Manager President Attachments: Figure 1: Site plan showing source area of release NC DWM DEQ CAP Approval Letter, November 4, 2015 OLD WALKERTOWN RDDAVIS RDD O R IS STSCHOOL ST LASLEY DRFIGURE1 33-30865GDocument Path: P:\ArcGIS\Chartis-Gant\arcproj\Property Figures_1_2016.mxdDate: 1/18/16 AGK Source Area of Release: Former Gant #31 Station (Red)5000 Old Walkertown RoadWinston-Salem, North Carolina Ü 0 0.025 0.050.0125 MilesService Layer Credits: Source: Esri,DigitalGlobe, GeoEye, Earthstar Geographics,CNES/Airbus DS, USDA, USGS, AEX,Getmapping, Aerogrid, IGN, IGP, swisstopo,and the GIS User Community Legend Groundwater Contour Groundwater Flow Direction Dissolved Phase Oil Plume Free Phase Oil Plume Former Gant # 31 Station Boundary 500 ug/L Total EPH 1,000 ug/L Total EPH ENVIRON Engineers of North Carolina, PC 1600 Parkwood Circle, Suite 310, Atlanta, GA 30339 V +1 770.874.5010 F +1 770.874.5011 January 20, 2016 CERTIFIED MAIL (7015 3010 0002 2372 4423) RETURN RECEIPT REQUESTED Marlon B. Hunter, Director Forsyth County Department of Public Health 799 North Highland Avenue Winston-Salem, NC 27102 Subject: Notice of Request for Approval of a Corrective Action Plan Former Gant #831 Station (currently Three Boys CITGO) 5000 Old Walkertown Road, Winston-Salem, North Carolina Forsyth County Incident No. 3355 Dear Director Hunter: This letter is being submitted on behalf of Gant Oil Company, Inc. (Gant) by ENVIRON Engineers of North Carolina, PC to inform you that a Corrective Action Plan (CAP) has been submitted to the NC Division of Waste Management (DWM), as noted in their letter dated November 4, 2015 (see attached) for the cleanup of a release from a petroleum underground storage tank (UST) system located at the above referenced site. State rules governing groundwater classifications and standards (15A NCAC 2L .0400) require that we notify you of the approved CAP activities, in addition to owners of property located contiguous to and/or downgradient of the source area site with respect to groundwater flow, which occurs in a southeasterly direction, as depicted on Figure 1. ENVIRON Engineers of North Carolina, PC, on behalf of the responsible party Gant Oil Company, Inc. is providing notice of the Corrective Action Plan that proposes: To cleanup soil contamination to the extent possible beneath diesel fuel and kerosene USTs; To cleanup groundwater contamination through the recovery of free phase oil; and To use natural processes of degradation and attenuation as a method to cleanup residual groundwater contamination. The source area of the contamination is located at 5000 Old Walkertown Road in Winston-Salem, NC at the northeast corner of the intersection of Old Walkertown Road and Davis Road. Groundwater flow occurs in a southeasterly direction, as depicted on Figure 1. The CAP involves the following activities: 1. Removal of two (2) 4,000 gallon petroleum USTs (kerosene and diesel fuel) including their associated fuel dispenser island, piping and canopy; 2. Excavation of the majority of petroleum impacted soils beneath the UST pit to a depth of approximately 20 feet below grade; 3. Installation of surfactant injection and free product extraction wells to facilitate the recovery of free phase oil and impacted groundwater via enhanced vacuum extractions; 4. Injection of surfactant (Biosolve) to desorb oil from soil into groundwater to permit its recovery via enhanced vacuum extractions; and 5. Allow natural processes of degradation to clean up residually impacted groundwater. Investigations performed to date have demonstrated that the extent of the free phase oil is limited to the UST area, based on weekly to monthly well gauging and free product recovery via hand bailing. Groundwater flow was determined to be in a southeasterly direction towards a railroad right-of-way and a large paved parking lot used by the railroad for the on- and off-loading of vehicles transported via freight cars. Sensitive environmental receptors do not exist in the subject area that would be at risk from this release. - 2 - While municipal drinking water is provided throughout the subject area, approximately six properties are located upgradient to the west and/or crossgradient to the south of the release area where residents may continue to utilize groundwater as a potable water source. While private drinking water wells are not located downgradient of the source area with respect to groundwater flow direction, the CAP is being implemented to reduce potential risk by removing the main source of oil in soil and groundwater from the source area (i.e. diesel fuel and kerosene USTs). Natural attenuation of residual contaminants is expected to continue after the CAP activities have achieved the removal of free phase oil to further assure the protection of public health and the environment. If you would like to examine the CAP, the DWM UST Section has the CAP along with other site information on file and available for public review. You may make copies of this information for a small fee, if you so desire. Any written comments concerning the CAP should be submitted to the following address within thirty (30) days of the date that this letter was issued: Michael Rogers, Hydrogeologist Division of Waste Management, UST Section 450 West Hanes Mill Road, Suite 300 Winston Salem, NC 27105 336-776-9685 All comments received within this time frame will be considered and a public meeting may be held should the Department find a significant degree of public interest in the proposed activities. The state approved CAP will go forward as planned provided no substantive comments or objections are received from the public within this period. Michael Rogers may be contacted during normal weekday business hours to answer questions or to arrange an appointment to review the information on file pertaining to the release. Public notification of the CAP is also being made by certified mail to Allen Joines, Mayor; David R. Plyler, Chairman of the Forsyth County Board of Commissioners; J. Dudley Watts, Jr., County Manager; Lee Garrity, City Manager; and other property owners and occupants within the jurisdiction of the source area of the release. Sincerely, Bruce Tease, PhD Russell S. Kemp, PE Senior Manager President Attachments: Figure 1: Site plan showing source area of release NC DWM DEQ CAP Approval Letter, November 4, 2015 OLD WALKERTOWN RDDAVIS RDD O R IS STSCHOOL ST LASLEY DRFIGURE1 33-30865GDocument Path: P:\ArcGIS\Chartis-Gant\arcproj\Property Figures_1_2016.mxdDate: 1/18/16 AGK Source Area of Release: Former Gant #31 Station (Red)5000 Old Walkertown RoadWinston-Salem, North Carolina Ü 0 0.025 0.050.0125 MilesService Layer Credits: Source: Esri,DigitalGlobe, GeoEye, Earthstar Geographics,CNES/Airbus DS, USDA, USGS, AEX,Getmapping, Aerogrid, IGN, IGP, swisstopo,and the GIS User Community Legend Groundwater Contour Groundwater Flow Direction Dissolved Phase Oil Plume Free Phase Oil Plume Former Gant # 31 Station Boundary 500 ug/L Total EPH 1,000 ug/L Total EPH ENVIRON Engineers of North Carolina, PC 1600 Parkwood Circle, Suite 310, Atlanta, GA 30339 V +1 770.874.5010 F +1 770.874.5011 January 20, 2016 CERTIFIED MAIL (7015 3010 0002 2372 4430) RETURN RECEIPT REQUESTED The Honorable Allen Joines, Mayor of Winston Salem P.O. Box 2511 Winston-Salem, NC 27102 Subject: Notice of Request for Approval of a Corrective Action Plan Former Gant #831 Station (currently Three Boys CITGO) 5000 Old Walkertown Road, Winston-Salem, North Carolina Forsyth County Incident No. 3355 Dear Mayor Joines: This letter is being submitted on behalf of Gant Oil Company, Inc. (Gant) by ENVIRON Engineers of North Carolina, PC to inform you that a Corrective Action Plan (CAP) has been submitted to the NC Division of Waste Management (DWM), as noted in their letter dated November 4, 2015 (see attached) for the cleanup of a release from a petroleum underground storage tank (UST) system located at the above referenced site. State rules governing groundwater classifications and standards (15A NCAC 2L .0400) require that we notify you of the approved CAP activities, in addition to owners of property located contiguous to and/or downgradient of the source area site with respect to groundwater flow, which occurs in a southeasterly direction, as depicted on Figure 1. ENVIRON Engineers of North Carolina, PC, on behalf of the responsible party Gant Oil Company, Inc. is providing notice of the Corrective Action Plan that proposes: To cleanup soil contamination to the extent possible beneath diesel fuel and kerosene USTs; To cleanup groundwater contamination through the recovery of free phase oil; and To use natural processes of degradation and attenuation as a method to cleanup residual groundwater contamination. The source area of the contamination is located at 5000 Old Walkertown Road in Winston-Salem, NC at the northeast corner of the intersection of Old Walkertown Road and Davis Road. Groundwater flow occurs in a southeasterly direction, as depicted on Figure 1. The CAP involves the following activities: 1. Removal of two (2) 4,000 gallon petroleum USTs (kerosene and diesel fuel) including their associated fuel dispenser island, piping and canopy; 2. Excavation of the majority of petroleum impacted soils beneath the UST pit to a depth of approximately 20 feet below grade; 3. Installation of surfactant injection and free product extraction wells to facilitate the recovery of free phase oil and impacted groundwater via enhanced vacuum extractions; 4. Injection of surfactant (Biosolve) to desorb oil from soil into groundwater to permit its recovery via enhanced vacuum extractions; and 5. Allow natural processes of degradation to clean up residually impacted groundwater. Investigations performed to date have demonstrated that the extent of the free phase oil is limited to the UST area, based on weekly to monthly well gauging and free product recovery via hand bailing. Groundwater flow was determined to be in a southeasterly direction towards a railroad right-of-way and a large paved parking lot used by the railroad for the on- and off-loading of vehicles transported via freight cars. Sensitive environmental receptors do not exist in the subject area that would be at risk from this release. - 2 - While municipal drinking water is provided throughout the subject area, approximately six properties are located upgradient to the west and/or crossgradient to the south of the release area where residents may continue to utilize groundwater as a potable water source. While private drinking water wells are not located downgradient of the source area with respect to groundwater flow direction, the CAP is being implemented to reduce potential risk by removing the main source of oil in soil and groundwater from the source area (i.e. diesel fuel and kerosene USTs). Natural attenuation of residual contaminants is expected to continue after the CAP activities have achieved the removal of free phase oil to further assure the protection of public health and the environment. If you would like to examine the CAP, the DWM UST Section has the CAP along with other site information on file and available for public review. You may make copies of this information for a small fee, if you so desire. Any written comments concerning the CAP should be submitted to the following address within thirty (30) days of the date that this letter was issued: Michael Rogers, Hydrogeologist Division of Waste Management, UST Section 450 West Hanes Mill Road, Suite 300 Winston Salem, NC 27105 336-776-9685 All comments received within this time frame will be considered and a public meeting may be held should the Department find a significant degree of public interest in the proposed activities. The state approved CAP will go forward as planned provided no substantive comments or objections are received from the public within this period. Michael Rogers may be contacted during normal weekday business hours to answer questions or to arrange an appointment to review the information on file pertaining to the release. Public notification of the CAP is also being made by certified mail to Marlon B. Hunter, Director of the Forsyth County Department of Public Health; David R. Plyler, Chairman of the Forsyth County Board of Commissioners; J. Dudley Watts, Jr., County Manager; Lee Garrity, City Manager; and other property owners and occupants within the jurisdiction of the source area of the release. Sincerely, Bruce Tease, PhD Russell S. Kemp, PE Senior Manager President Attachments: Figure 1: Site plan showing source area of release NC DWM DEQ CAP Approval Letter, November 4, 2015 OLD WALKERTOWN RDDAVIS RDD O R IS STSCHOOL ST LASLEY DRFIGURE1 33-30865GDocument Path: P:\ArcGIS\Chartis-Gant\arcproj\Property Figures_1_2016.mxdDate: 1/18/16 AGK Source Area of Release: Former Gant #31 Station (Red)5000 Old Walkertown RoadWinston-Salem, North Carolina Ü 0 0.025 0.050.0125 MilesService Layer Credits: Source: Esri,DigitalGlobe, GeoEye, Earthstar Geographics,CNES/Airbus DS, USDA, USGS, AEX,Getmapping, Aerogrid, IGN, IGP, swisstopo,and the GIS User Community Legend Groundwater Contour Groundwater Flow Direction Dissolved Phase Oil Plume Free Phase Oil Plume Former Gant # 31 Station Boundary 500 ug/L Total EPH 1,000 ug/L Total EPH UIC/In Situ Remed. Notification (Revised 3/2/2015) Page 1 NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES Print Clearly or Type Information. Illegible Submittals Will Be Returned As Incomplete. DATE: February 29, 2016____ PERMIT NO. (to be filled in by DWR) A. WELL TYPE TO BE CONSTRUCTED OR OPERATED (1) Air Injection Well……………………………..…Complete sections B-F, K, N (2) Aquifer Test Well……………………….………..Complete sections B-F, K, N (3) Passive Injection System…………………..……..Complete sections B-F, H-N (4) X Small-Scale Injection Operation………………….Complete sections B-N (5) Pilot Test………………………………………….Complete sections B-N (6) Tracer Injection Well………………………….….Complete sections B-N B. STATUS OF WELL OWNER: Business/Organization C. WELL OWNER – State name of entity and name of person delegated authority to sign on behalf of the business or agency: Name: Robert Gant, Gant Oil Company Mailing Address: 5177 Main Street City: Walkertown State: _NC__ Zip Code: 27051-0068 County: Forsyth Day Tele No.: (336) 595-2152 Cell No.: NA EMAIL Address: NA Fax No.: NA NOTIFICATION OF INTENT TO CONSTRUCT OR OPERATE INJECTION WELLS The following are “permitted by rule” and do not require an individual permit when constructed in accordance with the rules of 15A NCAC 02C .0200. This form shall be submitted at least 2 weeks prior to injection. AQUIFER TEST WELLS (15A NCAC 02C .0220) These wells are used to inject uncontaminated fluid into an aquifer to determine aquifer hydraulic characteristics. IN SITU REMEDIATION (15A NCAC 02C .0225) or TRACER WELLS (15A NCAC 02C .0229): 1) Passive Injection Systems - In-well delivery systems to diffuse injectants into the subsurface. Examples include ORC socks, iSOC systems, and other gas infusion methods. 2) Small-Scale Injection Operations – Injection wells located within a land surface area not to exceed 10,000 square feet for the purpose of soil or groundwater remediation or tracer tests. An individual permit shall be required for test or treatment areas exceeding 10,000 square feet. 3) Pilot Tests - Preliminary studies conducted for the purpose of evaluating the technical feasibility of a remediation strategy in order to develop a full scale remediation plan for future implementation, and where the surface area of the injection zone wells are located within an area that does not exceed five percent of the land surface above the known extent of groundwater contamination. An individual permit shall be required to conduct more than one pilot test on any separate groundwater contaminant plume. 4) Air Injection Wells - Used to inject ambient air to enhance in-situ treatment of soil or groundwater. UIC/In Situ Remed. Notification (Revised 3/2/2015) Page 2 D. PROPERTY OWNER (if different than well owner) Name: Assad Elkhoury, 5 Boy Citgo owned by Koury and Lokas Property LLC Mailing Address: 3502 Meadow Glen Court City: Clemmons State: _NC_ Zip Code: 27012 County: Forsyth Day Tele No.: NA Cell No.: (336) 624-9290 EMAIL Address: assadelkhoury@gmail.com Fax No.: NA E. PROJECT CONTACT - Person who can answer technical questions about the proposed injection project. Name: Bruce Tease Mailing Address: 28 Amity Street, Suite 2A City: Amherst State: MA_ Zip Code: 01002 County: Hampshire Day Tele No.: (413) 835-4355 Cell No.: (413) 875-5896 EMAIL Address: btease@ramboll.com Fax No.: NA F. PHYSICAL LOCATION OF WELL SITE (1) Physical Address: 5000 Old Walkertown Road County: Forsyth City: Winston-Salem State: NC Zip Code: 27105 (2) Geographic Coordinates: Latitude**: Longitude**: Reference Datum: Accuracy: Method of Collection: **FOR AIR INJECTION AND AQUIFER TEST WELLS ONLY: A FACILITY SITE MAP WITH PROPERTY BOUNDARIES MAY BE SUBMITTED IN LIEU OF GEOGRAPHIC COORDINATES. G. TREATMENT AREA Land surface area of contaminant plume: 6,400 square feet Land surface area of inj. well network: 400 square feet (< 10,000 ft2 for small-scale injections) Percent of contaminant plume area to be treated: 6.25% (must be < 5% of plume for pilot test injections) H. INJECTION ZONE MAPS – Attach the following to the notification. (1) Contaminant plume map(s) with isoconcentration lines that show the horizontal extent of the contaminant plume in soil and groundwater, existing and proposed monitoring wells, and existing and proposed injection wells; and (2) Cross-section(s) to the known or projected depth of contamination that show the horizontal and vertical extent of the contaminant plume in soil and groundwater, changes in lithology, existing and proposed monitoring wells, and existing and proposed injection wells. (3) Potentiometric surface map(s) indicating the rate and direction of groundwater movement, plus existing and proposed wells. UIC/In Situ Remed. Notification (Revised 3/2/2015) Page 3 I. DESCRIPTION OF PROPOSED INJECTION ACTIVITIES – Provide a brief narrative regarding the purpose, scope, and goals of the proposed injection activity. This should include the rate, volume, and duration of injection over time. A 5% aqueous solution of Biosolve (surfactant) shall be injected under pressure at eight injection wells. The volume of Biosolve injected will be empirically determined based on its acceptance by the surrounding silt/clay matrix. The dispersion of the Biosolve solution is expected to occur via the same fracture network that the free phase oil migrated through. The goal of the surfactant injections is to reduce free product thickness to < 1/8 inch in site monitoring wells. At least three surfactant injection/product recovery events are planned at the site. J. INJECTANTS – Provide a MSDS and the following for each injectant. Attach additional sheets if necessary. NOTE: Approved injectants (tracers and remediation additives) can be found online at http://portal.ncdenr.org/web/wq/aps/gwpro. All other substances must be reviewed by the Division of Public Health, Department of Health and Human Services. Contact the UIC Program for more info (919-807-6496). Injectant: Biosolve Pinkwater (surfactant) Volume of injectant: To be empirically determined based on acceptance of surrounding clay/silt matrix. Estimating 500 gallons per event. Concentration at point of injection: 5% aqueous solution Percent if in a mixture with other injectants: NA Injectant: Volume of injectant: Concentration at point of injection: Percent if in a mixture with other injectants: Injectant: Volume of injectant: Concentration at point of injection: Percent if in a mixture with other injectants: K. WELL CONSTRUCTION DATA (1) Number of injection wells: 8 Proposed 0 Existing (2) Provide well construction details for each injection well in a diagram or table format. A single diagram or line in a table can be used for multiple wells with the same construction details. Well construction details shall include the following: (a) well type as permanent, direct-push, or subsurface distribution system (infiltration gallery) (b) depth below land surface of grout, screen, and casing intervals (c) well contractor name and certification number – to be determined UIC/In Situ Remed. Notification (Revised 3/2/2015) Page 4 L. SCHEDULES – Briefly describe the schedule for well construction and injection activities. Week 1 – GPR survey and utility clearance; Weeks 2 and 3 – UST, dispensers, and canopy removal; Week 4 – Soil excavation and disposal; Week 5 – Backfill and asphalt paving of tank grave; Week 6 – Install and survey injection and recovery wells; Week 7 – LNAPL gauging and recovery, 1st surfactant injection, and GW monitoring; Week 8 – LNAPL and surfactant extraction, LNAPL gauging and GW monitoring; Weeks 9 and 10 – LNAPL gauging and GW monitoring; Week 11 – 2nd surfactant injection, LNAPL gauging and recovery, and GW monitoring; Week 12 – LNAPL and surfactant extraction, LNAPL gauging and GW monitoring; Weeks 13 and 14 – LNAPL gauging and GW monitoring; Week 15 – 3rd surfactant injection, LNAPL gauging and recovery, and GW monitoring; Week 16 - LNAPL and surfactant extraction, LNAPL gauging and GW monitoring; and Weeks 17 through 20 - LNAPL gauging and GW monitoring. M. MONITORING PLAN – Describe below or in separate attachment a monitoring plan to be used to determine if violations of groundwater quality standards specified in Subchapter 02L result from the injection activity. The dispersion of Biosolve shall be monitored through the analysis of methylene blue active substance (MBAS), an indicator ingredient of this surfactant. Additionally, groundwater monitoring will be conducted daily to weekly as warranted after the surfactant injection events and will conclude two weeks after the third and final surfactant injection event. UIC/In Situ Remed. Notification (Revised 3/2/2015) Page 5 N. SIGNATURE OF APPLICANT AND PROPERTY OWNER APPLICANT: “I hereby certify, under penalty of law, that I am familiar with the information submitted in this document and all attachments thereto and that, based on my inquiry of those individuals immediately responsible for obtaining said information, I believe that the information is true, accurate and complete. I am aware that there are significant penalties, including the possibility of fines and imprisonment, for submitting false information. I agree to construct, operate, maintain, repair, and if applicable, abandon the injection well and all related appurtenances in accordance with the 15A NCAC 02C 0200 Rules.” Bruce Tease Signature of Applicant Print or Type Full Name PROPERTY OWNER (if the property is not owned by the permit applicant): “As owner of the property on which the injection well(s) are to be constructed and operated, I hereby consent to allow the applicant to construct each injection well as outlined in this application and agree that it shall be the responsibility of the applicant to ensure that the injection well(s) conform to the Well Construction Standards (15A NCAC 02C .0200).” “Owner” means any person who holds the fee or other property rights in the well being constructed. A well is real property and its construction on land shall be deemed to vest ownership in the land owner, in the absence of contrary agreement in writing. Assad Elkhoury Signature* of Property Owner (if different from applicant) Print or Type Full Name * An access agreement between the applicant and property owner may be submitted in lieu of a signature on this form. Submit the completed notification package to: DWR – UIC Program 1636 Mail Service Center Raleigh, NC 27699-1636 Telephone: (919) 807-6464 Document Path: P:\ArcGIS\Chartis-Gant\arcproj\NOI Fig 1 Iso Map.mxdÜ FIGURE1 33-30865GDate: 2/11/2016 AGK Total EPH Isoconcentration Map Former Gant #31 Station Including Proposed Injection and Extraction Wells5000 Old Walkertown RoadWinston-Salem, North Carolina Document Path: P:\ArcGIS\Chartis-Gant\arcproj\NOI Fig 2 Cross Section.mxdProposed Wells25' and 35' bgs Injection Wells (x2)40' bgs Extraction Well (x2) FIGURE2 33-30865GDate: 2/12/2016 AGK Cross Section Former Gant #31 Station Including Proposed Injection and Extraction Wells5000 Old Walkertown RoadWinston-Salem, North Carolina Zone 1 Zone 3 Zone 2 Document Path: P:\ArcGIS\Chartis-Gant\arcproj\NOI Fig 3 Pot .mxdÜ FIGURE3 33-30865GDate: 2/11/2016 AGK Potentiometric Surface Map Former Gant #31 Station Including Proposed Injection and Extraction Wells5000 Old Walkertown RoadWinston-Salem, North Carolina Material Safety Data Sheet Page 1 of 5 Section 1 – Chemical Product and Company Identification Chemical Product: BioSolve Pinkwater® Date Prepared: 01/01/2012 Manufacturer: The BioSolve Company 329 Massachusetts Avenue Lexington, MA 02420 USA Emergency Phone: (800) 255-3909 US, Canada, Mexico and Puerto Rico +1 (781) 482-7900 All other locations Section 2 – Composition/Information on Ingredients BioSolve Pinkwater CAS# 138757-63-8 Formulation with nonionic surfactants Concentration: ~32% active ingredients Note: This product is considered non-hazardous as defined by CERCLA, according to OSHA, Massachusetts Right to Know Law and California Prop 65. Section 3 – Hazards Identification Overview: Non-flammable, non-hazardous, water-based surfactant formulation Appearance: Dyed: Deep red liquid Clear: light golden liquid Odor: Mild, pleasant odor Potential Health Effects Eye Contact: May cause mild, temporary irritation and redness Skin Contact: May cause temporary irritation, redness and drying of the skin Inhalation: Inhalation of concentrated vapors resulting from heating or spraying in confined or poorly ventilated areas may cause irritation of nose and throat Ingestion: May cause abdominal discomfort, nausea or diarrhea Pre-existing skin and eye disorders may be aggravated by contact Material Safety Data Sheet Page 2 of 5 Section 4 – First Aid Measures Eyes: Immediately flush eyes with plenty of water for at least 15 minutes. Hold eyelids apart while flushing to rinse entire surface of eye and lids with water. Seek medical attention. Skin: Rinse exposed area and wash with mild soap and water for several minutes. Seek medical attention if irritation develops. Ingestion: Seek medical attention. Inhalation: None considered necessary. Other Instructions: None. Section 5 – Fire Fighting Measures Flash Point: Not applicable Flammability Limits: Lower – Not applicable Upper – Not applicable Special Protective Equipment for Firefighters: None necessary Unusual Fire or Explosive Hazards: None Solvent for Cleanup: Water Section 6 – Accidental Release Measures In case of accidental release, breakage or leakage: Eliminate or contain source with inert material, such as sand, earth, absorbent pads, etc. Transfer liquid to suitable containers for recovery, re-use or disposal. Wipe up or mop up using water. Hard surfaces (e.g., floors, driveways) may be slippery; so use care to avoid falling. Rinse area with water. Avoid discharging to natural streams and lakes. Note: Always check with local regulations before discharging effluent to storm drains or sewers. Avoid prolonged contact with skin, eyes or clothing. Material Safety Data Sheet Page 3 of 5 Section 7 – Handling and Storage Handling: Minimize periods of exposure to extreme temperatures. Keep from freezing. If frozen, separation may occur; thaw and stir thoroughly prior to use. Storage: Recommended storage temperature: 35o – 120o F (1o – 48o C) Shelf Life: If unopened, more than 10 years Section 8 – Exposure Controls / Personal Protection Eyes/Face: Safety glasses, chemical goggles, or face shield recommended Skin: Rubber or latex gloves recommended Respiratory: None required, except if application results in significant misting of product. Use MSHA/NIOSH approved half mask air purifying respirator Footwear: No special requirements Clothing: Wear a chemical apron or coveralls; launder clothing if contaminated Other: Eye wash station Engineering Controls: For indoor use, general (mechanical) room ventilation is expected to be satisfactory Section 9 – Physical and Chemical Properties Appearance: Light golden, unless dyed deep red Odor: Mild, pleasant fragrance Concentration: ~32% active ingredients as sold Boiling Point 265oF/129oC Vapor Pressure mm/Hg Not applicable Melting/Freezing Point 28oF/-2oC Vapor Density (Air=1) Not applicable Surface Tension 6% sol’n 29 Dyne/cm @25oC Viscosity (concentrate) 490 centipoise Reactivity with Water None Viscosity (6% solution) 15 centipoise Evaporation Rate Not determined Solubility in Water Complete Specific Gravity 1.00 +/- .01 VOC Content Not determined Pounds per Gallon 8.38 pH 9.1 +/- 0.3 Material Safety Data Sheet Page 4 of 5 Section 10 – Stability and Reactivity Stability: Stable Conditions to Avoid: Prolonged exposure to heat may cause product degradation. Freezing conditions should also be avoided as discussed in Section 7. Incompatible Materials: Normally unreactive. However, avoid strong alkalis at high temperature, strong acids, strong oxidizing agents and materials with reactive hydroxyl compounds. These compounds could damage the product and reduce its effectiveness during application. Hazardous Decomposition Products: None Hazardous Polymerization: Will not occur. Section 11 – Toxicological Information Health Effects: No adverse health effects expected if product handled in accordance with the Material Safety Data Sheet. See Section 3 for discussion of potential Health Effects Section 12 – Ecological Considerations Avoid contaminating waterways; at high concentrations may interfere with fish respiration. Aquatic Toxicity: Low potential to effect aquatic organisms Menidia beryllina: LC50 = 247 ppm @3% solution Mysidopsis bahia: LC50 = 185 ppm @3% solution Chemical Fate: Biodegradable Section 13 - Disposal This product has been evaluated for RCRA characteristics and does not meet the criteria of a hazardous waste if disposed of in its original form. However, the intended use of this product as a remediation and/or surface washing agent may render the effluent hazardous and should be disposed of accordingly. Note: Always obtain approval from local and federal regulatory agencies prior to discarding this product into public sewers or storm drains. Material Safety Data Sheet Page 5 of 5 Section 14 – Transportation Information USDOT Freight Class 55 (Liquid Cleaning Compound, Non-Hazardous) This product is not regulated by USDOT or Canadian TDG when shipped domestically by land. North American Industry Classification System (NAICS) # 325613 U.S. ITC, Harmonized Tariff Schedule B Classification: 3402.90.30.00 Section 15 – Regulatory Information The information herein is presented in good faith and believed to be accurate as of the effective date shown above. However, no warranty, express or implied, is given. Regulatory requirements are subject to change and may differ from one location to another; it is the buyer’s responsibility to ensure that its activities comply with federal, state or provincial, and local laws. This product is considered non-hazardous as defined by CERCLA, according to OSHA, Massachusetts Right to Know Law and California Prop 65. Section 16 – Other Information National Fire Protection Association Ratings Health: 1 Flammability: 0 Reactivity: 0 Personal Protection: Gloves, Safety glasses BioSolve Pinkwater® is listed on the US EPA’s NCP Product Schedule (#SW-20). This listing does not mean that EPA approves, recommends, licenses, certifies or authorizes the use of BioSolve Pinkwater on any oil discharge. This listing means only that data has been submitted to EPA as required by Subpart J of the National Contingency Plan, 300.915. For more information, visit: www.biosolve.com 4 permanent injection To be determined 2 25 0-20 20-25 18-25 16-18 1-16 4 permanent injection To be determined 2 35 0-25 25-35 23-35 21-23 1-21 4 permanent extraction To be determined 4 40 0-20 20-40 18-40 16-18 1-16 The 8 injection wells and 4 extraction wells are to be installed within the tank graves of 2 USTs (4,000 gallons each) after removal and backfilling. Table 1: Proposed Injection and Extraction Well Construction Data Well Dia. (inches) Drilling Contractor and Certification Number Well Type Number of Injection Wells Well Depth (ft. bgs) Depth Interval of Riser (ft. bgs) Depth Interval of Screen (ft. bgs) Depth Interval of Sand Pack (ft. bgs) Depth Interval of Bentonite Seal (ft. bgs) Depth Interval of Grout (ft. bgs) Former Gant #31 Station 5000 Old Walkertown Road, Winston-Salem, North Carolina