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DOCUMENTATION OF ENVIRONMENTAL INDICATOR DETERt-IINATJON
Interim Final 2599 RCRA Corrective Action
Envi-onmental Indicator (EI) RCIUS code (CA750)
Migration of Contaminated Groundwater Under Control
Facility Name United Technologies Corporation (UTC) Climate Controls amp Security Facility Address 129 North Street Pittsfield Somerset County Maine ___ Facility EPA ID MED 001106293
I Has all available relevantsignificant information on known and reasonably suspected releases to the groundwater media subject to RCRA Corrective Action (eg from Solid Waste Management Units (SWMU) Regulated Units (RU) and Areas ofConcern (AOC)) been considered in this EI determination
X Ifyes - check here and continue with 2 below
If no - re-evaluate existing data or
__ if data are not available skip to 8 and enterIN (more information needed) status code
BACKGROUND
Definition of Environmental Indicators (for the RCRA Corrective Action)
Environmental Indicators (ET) are measures being used by the RCRA CotTective Action program to go beyond programmatic activity measures (eg reports received and approved etc) to track changes in the quality of the enviromnent The two El developed to-date indicate the quality of the environment in relation to ctment human exposures to contamination and the migration of contaminated groundwater An EI for non-human (ecological) receptors is intended to be developed in the future middot
Definition of Migration of Contaminated Groundwater Under Control EI
A positive Migration ofContaminated Groundwater Under Control El dctennination (YE status code) indicates that the migration ofcontaminated groundwater has stabilized and that monitoring will be conducted to confim1 that contaminated groundwater remains within the original area of contaminated groundwater (for all groundwater contamination subject to RCRA corrective action at or from the identified facility (i e site-wide)) Uclntionship of El to Final Remedies
While Final remedies remain the long-term objective of the RCRA Collective Action program the EI are near-term objectives which are ctmently being used as Program measures for the Government Performance and Results Act of 1993 GPRA) The Migration of Contaminated
Groundwater Under Control El pertains ONLY to the physical migration (ie fiirther spread) ofcontaminated ground water and contaminants within groundwater (eg non-aqueous phase liquids or NAPls) Achieving this El does not substitute for acrueving other stabilization or final remedy requirements and expectations associated with sources ofcontamination and the need to restore wherever practicable contaminated groundwater to be suitable for its designated current and future uses
Duration A1mlicabilily of EI Determinations
EI Determinations status codes should remain in RCRlS national database ONLY as long as they remain true (ie RCRIS status codes must be changed when the regulatoy authorities become aware of contrary information)
Migration of Contaminated Groundwater Under Control Environmental lndicntor (El) RCRIS code (CA750)
Page 2
2 Is groundwater known or reasonably suspected to be contaminated above appropriately protective levels (ie applicable promulgated standards as well as other appropriate standards guidelines guidance or criteria) from releases subject to RCRA Corrective Action anywhere at or from the facility
X l f yes - conlinue after identifying key contaminants citing appropriate levels and referencing supporting documentation
lfno - skip to 8 and enter YE status code after citing appropriate levels and referencing supporting documentation to demonstrate that groundwater is not contaminated
Ifunknown - skip to 8 and enter IN stan1s code
Rationale and Reference(s)_ _ Groundwater exceedances are shown in (Table I) Low to very low levels of volatile organic compounds were
detected in at a number ofcast side monitoring well locations The standards were exceeded for l 4- Dioxane which was detected at 73 and 126 micrograms per liter (ug1) at GW-212 and GW-214 in 2013 1 4 Dioxane was not detected above the method detection limit (USEPA method 8260) of25 ug1 in 2014
Total metals detections that exceeded standards (Table I) were unfiltered grab samples with elevated turbidity Based on the four locations where both total and filtered samples were collected (GW-208 GW-210 GW-211 and GW-215) the dissolved results were below the standards and are believed to be representative of the actual groundwater concentrations
Characterization of SWwfU 22 a penmiddotoleum LNAPL site indicates there were 110 Maine Exposure Guidelines (MEGs) exceedances for volatile organic compounds and the groundwater sampling in the vicinity ofSWMU 22 docs not indicate that the LNAPL is resulting in exnmiddotactable petroleum hydrocarbons (EPH) above the (ii1EGs) Forensics analysis indicates that the product is weather heavy oil that has been in the subsurface for 10 to 20 years There is 110 evidence that the petroleum is migrating to the surface water
foo11101cs Contilmination uul con1amina1ed describlts media concaining con1aminan1s (in any fonn NAlL andor dissolved vapors or solids tha1 are s11bjec1 10 RCRA) in conccnlJllions in excess ofapproprio1e middotmiddotlevels (appropriate for the protection of lhe groundwater resource and its beneficial uses)
Migration ofCoutaminntcd Groundwater Under Control Envirnnmcntal [ndicator (El) RCRIS code (CA 750)
Page 3
3 Has the migration of contaminated groundwater stabilized (such that contaminated groundwater is expected to remain will1in existing area ofcontaminated groundwater2 as ddined by the monitoring locations designated at the time of this detennination)
_X_ If yes - continue after presenting or referencing tl1e physical evidence (eg groundwater samplingmeasurementmigration barrier data) and rationale why coutaminated grouudwater is expected to remain withiu the (horizontal or vertical) dimensions ofthe existing area ofgroundwater contamination2
)
lfno (contaminated groundwater is observed or expected to migrate beyond the designated locations defining the existing area of groundwater contamination2
) - skip to 8 and enter NO status code after providing an explanation
If unknown - skip to 8 and enter IN status code
Rationale and Reforence(s) ___ The VOC zone iu groundwater is limited to an approximate 200 foot length with the most elevated level contained within an approximate 80 foot length between GWB-214 and GWB-2 l 0 Due to the presence ofshallow bedrock in the river bed the migration pathways tlumiddotough saturated soil to the river are thin and intenninent (ie absent at locations where bedrock rises above the ground water table) For a majority of the yenr groundwater is interpreted to discharge from soils beneath the Site into the river given the regional valley location oftl1e Site Based on the observed connection between water levels in wells and in the river the river is expected to recharge the groundwater during only brief periods ofhigh flow when river levels are higher than groundwater Flow into the bedrock is expected to be impeded in areas by the presence of low permeability glacial till that overlies a majority ofthe bedrock surface Based on estimates ofgroundwater nux beneath the site and recorded minimum river flows groundwater is expected to be diluted on the order of 500 fold when it discharges to and mixes with the river water (Final RCRA Facility Investigation Report UTC Business amp Industrial Systems Pittsfield Maine September 17 2015)
Characteri7ation of SVifU 22 a petroleum LNPL site indicates there were no Maine Exposure Guidelines (MEGs) exceedances for volatile organic compounds and the groundwater sampling in the vicinity ofSWMU 22 does not indicate that the LNAPL is resulting in extractable petroleum hydrocarbons (EPH) above the (i-lEGs) Forensics analysis indicates that the product is weather heavy oil that bas been in the subsurface for IO to 20 years There is no evidence that the petroleum is migrating to the surface water
The area is serviced by public water and there are no water supply wells within 2000 feet oftlie site
Foorno1cs 1 existing area ofcontaminated groundwater is an area (wilh horizontal and vertical dimensions) that has been verifiably demonstrated to contain alt relevant groundwater contamination for ~1is delennination and is defined by designated (monitoring) locations proximate tu lhe outer perimeter ofcontamina1ion that can and will be sampled1es1cd in the future to physically verify that nll contuminuled groundwater remains within this arct and lhat the fiirtl1er migration ofconlaminated _groundwater i_ 1101 occurring Reasonable allowances in the proximity of the monitoring locations are pennissiblc to incorporale fomrnl remedy decisions (ie including public participation) allowing u limited area for nuiurat attenuation
Migration or Contaminated Groundwnter Under Control Environmental Indicator (El) RCRIS code (CA750)
Page 4
4 Does contaminated groundwater discharge into surface water bodies
_X_ Ifyes - continue after identif)bulling potentially affected surface water bodies
If no - skip to 7 (and enter a YE status code in 8 if7 ~ yes) after providing an explanation andor referencing documcntation supporting tbat groundwater contamination does not enter surface water bodies
If unknown - skip to 8 and enter IN status code
Rationale and Reference(s) Final RFI report UTC Business and Industrial Systems Pittsfield Maine September 17 2015 Pore water sampling results identified low to trace levels ofthree VOC contaminants two of which were less than 10 X their appropriate standard the (Maine Exposure Guidelines dated October 19 20 12 ) and one that exceeded IO X the standard but is below the I 00 X standard ( see table 2) No metals were detected in pore water sampling The groundwater discharges to the Scbasticook River a class C water
Discharges to class C waters may cause some changes to the aquatic environment except they must be of sufficient quality to support indigenous fish and maintain the stmcn1re ofand function ofthe residential biologic conununity Class C waters may be used for industrial process water and cooling water for electrical generation
Existing groundwater monitoring data indicates a limited number of low levels ofsolvent and metal detections in the groundwater that could migrate to the river over a thin andor limited width area along the river Observations of extensive bedrock outcrop along the shore ofthe river adjacent to the site suggest limited habitat for benthic communities consisting of localized small pockets of sand between rock layers
Migration of Contaminlltcd Groundwater Under Control Envfronmentnl Indicator (EI) RCRIS code (CA750)
Page 5
5 Is the disrlrnrge ofcontaminated groundwater into surface water likely to be insignificant (ie the maximum concemration3 ofeach contaminant discharging into surface water is less than IO times their appropriate groundwater level and there are no other conditions (eg the nature and number of discharging contaminants or environmental setting) which significantly increase the potential for unacceptable impacts to surface water sediments or eco-systems at these concentrations)
Ifyes - skip to 7 (and cnter YE stan1s code in IJ8 if17 = yes) after documenting I) the maximum kJ1own or reasonably suspected concentration3 of sfil contaminants discharged above their groundwater level the value of the appropriate level(s) and if there is evidence that the concentrations are increasing and 2) provide a statement of professional judgementexplanation (or reference documentation) supporting that the discharge ofgroundwater contaminants into the surface water is not anticipated to have unacceptable impacts to the receiving surtace water sediments or eco-system
_X_ lf no - (the discharge ofcontaminated groundwater into surface water is potentially significant) - continue after documeniing I) the maximum known or reasonably suspected concentration3 ofeach contaminant discliarged above its groundwater level the value ofthe appropriate level(s) and ifthere is evidence that the concentrations are increasing and 2) for any contaminants discharging into surface water in concentrations3
greater than JOO times their appropriate groundwater levels the estimated total amount (mass in kgyr) ofeach ofthese contaminants that are being discharged (loaded) into the surface water body (at the time ofthe dctem1ination) and identify ifthere is evidence that the amount ofdischarging contaminants is increasing
If unknown - enter IN status code in 18
Rationale and Reference(s) Final RFI repo11 UTC Business and Industrial Systems Pittsfield Maine September 17 2015 Pore water sampling results identified low to trace levels ofthree contaminants two of which were less than 10 X their appropriate standard the (Maine Exposure Guidelines dated October 19 2012 ) and one that exceeded IO X the standard but is below the I 00 X standard ( sec table 2)
Based on estimates ofgroundwater flux beneath the site and recorded minimum river flows groundwater is expected to be diluted on the order of500 fold when it discharges to and mixes with the river water (Final RCRA Facility Investigation Report UTC Business amp Industrial Systems Pittsfield Maine September 17 2015)
loo1no1cs As measured in grounltl~tler prior to entry to the gronndwatcr-surfocc waterstdiment internetion (eg hyporhcic) zone
Migration of Contaminated Grou11dw11te1middot Under Control Envh-onmenlal Indicator (El) RCIUS code (CA750)
Page 7
7 Will groundwater monitoring measurement data (and surface watersedimentecological data as necessary) be collected iu the future to verify that contaminated groundwater has remained within the horizontal (or vertical as necessary) dimensions of the existing area ofcontaminated groundwater
_ X_ Ifyes - continue after providing or citing documentation for planned activities or future samplingmeasurement events Specifically identify the wellmeasurement locations which will be tested in the future to verify the expectation (identified in ff3) that groundwater contamination will not be migrating horizontally (or vertically as necessary) beyond the middotexisting area ofgroundwater contamination
If no - enter middotmiddotNO stan1s code in 8
If unknown - cnterIN stan1s code in 8
Rationale and Reterence(s)
A groundwater monitoring plan will be established utiliting selected groundwater monitoring well locations and parameters to include volatile organic compounds and metals total and dissolved at ERtvl-6 and ERM-10 at central well fence locations between the building and the river
Develop a long tenn management plan for SWMU 22 to ensure that LNAPL is not migrating to the river or offsite
o Long term monitoring of selected wells for the presence and or thickness of free product o Establish criteria against which monitoring results could be compared to allow for a determination
that conditions had changed and that the LNAPL was mobile and moving toward the river or off site
o A conceptual design for a contingent recovery system in the event the established criteria are not met
Migratio11 of Contamiunted Groundwater Under Control Environmental Indicator (EI) RCIUS code (CA7S0)
Page 8
Based on estimates ofgroundwater flux beneath the site and recorded minimum river flows groundwater is expected to be diluted on the order of 500 told when it discharges lo and mixes with the river water (Final RCRA Facility investigation Report UTC Business amp Industrial Systems Pittsfield Maine September 17 2015) This would dilute the vinyl chloride discharge from 168 ug1 to well under the 02 ug1 MEG standard
Footnotes Nole because areas of iullowing groundwater can be critical habitats (eg nurseries or thennal relilgia) for many species appropriate specialist (eg ecologist) should be included in management dcdsions 1ha1 could eliminate these areas by signilicanll) altering or reversing groundwulcr llow pathways near surface waler bodies
The 1111krstm1ding ofthe impacts ofcontaminated groundwater discharges into surfoc wutcr bodies is 1 rapidly developing field and reviewers are encouraged to look 10 the latest guidance for the appropriate methods and scale of lcmonslrntion to be reasonably certain that discharges are not causing currently unacccplitblc impacts lo the surface waters sltdimcnls or ~o-systems
8 Check the appropriate RCRJS status codes for the Migration ofContaminated Groundwater Under Control El (event code CA750) and obtain Supervisor (or appropriate Manager) signature and date on the EI determination below ( attach appropriate supporting documentation as well as a map of the facility)
X YE - Yes Migration ofContaminated Groundwater Under Control has been verified Based on a review of the information contained in this Ef determination it has been determined that the Migration ofContaminated Groundwater is Under Control at the United Technologies Corporation (UTC) Climate Controls amp Security facility EPA TD MED 001106293 located at_ 129 No1th Street Pittsfield Somerset County Maine Specifically this detennination indicates that the migration ofcontaminated groundwater is under control and that monitoring will be conducted to confom that contaminated groundwater remains within the existing area of contaminated groundwater This determination will be re-evaluated when the Agency becomes aw~1rc ofsignificant changes at the facility
NO - Unacceptable migration ofcontaminated groundwater is observed or expected
IN - More information is needed to make a determination
Date P-Supervisor si nature
(EPA Region or State)
Locations where References may be found
JMnL t~~~ ~rv ltLtz Abii
Contact telephone and e-mail numbers
(name)___ ______ _____ (phone)_ ___________ (e-mail)___ ____ _ ____ _
Table 1 Groundwater exceedances only
UTC BIS Pittsfield Maine 2013-2014
I Parameter MEG Units GW-204 GW-208 GW -209 GW-210 GW-211 GW-212 GW-212 GW-2014 GW-2i4 lOX lOOX 2013 2013 2013 2013 2013 2013 2014 2013 2014 St d Std
14 Dioxane 4 UgI 734 25U 126 25U 40 400 Chromium 20 Ug I 564 194 467 133 211 200 2000 Lead 10 UgI 145 37 475 296 48 I 100 1000 Nickle 20 UgI 132 308 105 200 2000 Vinyl 02 UgI 061J 2 20 Chloride Cyanide 4 UgI 42J 40 400
Table 1 continued
Parameter
Chromium
Lead Nickle
MEG
20 10 20
Units
UgI UgI UgI
GW-215 2013 268 538 244
GW-2017 2013
59 628 475
l0X Standard
200 100 200
l00X Standard
2000 1000 2000
Metals total Maine Exposure Guidelines (MEG) May 8 2013 (corrected October 2013) U-below method detection limit Concentrations of metals in four dissolved samples taken at (GW-208 GW-210 GW-211 and GW-215) were below the MEG
Table 2 Pore Water Detections
Exceedances only
Parameter Maine Exposure Units PW-111 6252014 10 X Standard 100 X Standard Guideline
Cis-12-Dichloroethene 10 ugL 206 100 1000 Trichloroethene 4 ugL 7 40 400
Vinyl chloride 02 ugL 168 2 20
Groundwater Under Control El pertains ONLY to the physical migration (ie fiirther spread) ofcontaminated ground water and contaminants within groundwater (eg non-aqueous phase liquids or NAPls) Achieving this El does not substitute for acrueving other stabilization or final remedy requirements and expectations associated with sources ofcontamination and the need to restore wherever practicable contaminated groundwater to be suitable for its designated current and future uses
Duration A1mlicabilily of EI Determinations
EI Determinations status codes should remain in RCRlS national database ONLY as long as they remain true (ie RCRIS status codes must be changed when the regulatoy authorities become aware of contrary information)
Migration of Contaminated Groundwater Under Control Environmental lndicntor (El) RCRIS code (CA750)
Page 2
2 Is groundwater known or reasonably suspected to be contaminated above appropriately protective levels (ie applicable promulgated standards as well as other appropriate standards guidelines guidance or criteria) from releases subject to RCRA Corrective Action anywhere at or from the facility
X l f yes - conlinue after identifying key contaminants citing appropriate levels and referencing supporting documentation
lfno - skip to 8 and enter YE status code after citing appropriate levels and referencing supporting documentation to demonstrate that groundwater is not contaminated
Ifunknown - skip to 8 and enter IN stan1s code
Rationale and Reference(s)_ _ Groundwater exceedances are shown in (Table I) Low to very low levels of volatile organic compounds were
detected in at a number ofcast side monitoring well locations The standards were exceeded for l 4- Dioxane which was detected at 73 and 126 micrograms per liter (ug1) at GW-212 and GW-214 in 2013 1 4 Dioxane was not detected above the method detection limit (USEPA method 8260) of25 ug1 in 2014
Total metals detections that exceeded standards (Table I) were unfiltered grab samples with elevated turbidity Based on the four locations where both total and filtered samples were collected (GW-208 GW-210 GW-211 and GW-215) the dissolved results were below the standards and are believed to be representative of the actual groundwater concentrations
Characterization of SWwfU 22 a penmiddotoleum LNAPL site indicates there were 110 Maine Exposure Guidelines (MEGs) exceedances for volatile organic compounds and the groundwater sampling in the vicinity ofSWMU 22 docs not indicate that the LNAPL is resulting in exnmiddotactable petroleum hydrocarbons (EPH) above the (ii1EGs) Forensics analysis indicates that the product is weather heavy oil that has been in the subsurface for 10 to 20 years There is 110 evidence that the petroleum is migrating to the surface water
foo11101cs Contilmination uul con1amina1ed describlts media concaining con1aminan1s (in any fonn NAlL andor dissolved vapors or solids tha1 are s11bjec1 10 RCRA) in conccnlJllions in excess ofapproprio1e middotmiddotlevels (appropriate for the protection of lhe groundwater resource and its beneficial uses)
Migration ofCoutaminntcd Groundwater Under Control Envirnnmcntal [ndicator (El) RCRIS code (CA 750)
Page 3
3 Has the migration of contaminated groundwater stabilized (such that contaminated groundwater is expected to remain will1in existing area ofcontaminated groundwater2 as ddined by the monitoring locations designated at the time of this detennination)
_X_ If yes - continue after presenting or referencing tl1e physical evidence (eg groundwater samplingmeasurementmigration barrier data) and rationale why coutaminated grouudwater is expected to remain withiu the (horizontal or vertical) dimensions ofthe existing area ofgroundwater contamination2
)
lfno (contaminated groundwater is observed or expected to migrate beyond the designated locations defining the existing area of groundwater contamination2
) - skip to 8 and enter NO status code after providing an explanation
If unknown - skip to 8 and enter IN status code
Rationale and Reforence(s) ___ The VOC zone iu groundwater is limited to an approximate 200 foot length with the most elevated level contained within an approximate 80 foot length between GWB-214 and GWB-2 l 0 Due to the presence ofshallow bedrock in the river bed the migration pathways tlumiddotough saturated soil to the river are thin and intenninent (ie absent at locations where bedrock rises above the ground water table) For a majority of the yenr groundwater is interpreted to discharge from soils beneath the Site into the river given the regional valley location oftl1e Site Based on the observed connection between water levels in wells and in the river the river is expected to recharge the groundwater during only brief periods ofhigh flow when river levels are higher than groundwater Flow into the bedrock is expected to be impeded in areas by the presence of low permeability glacial till that overlies a majority ofthe bedrock surface Based on estimates ofgroundwater nux beneath the site and recorded minimum river flows groundwater is expected to be diluted on the order of 500 fold when it discharges to and mixes with the river water (Final RCRA Facility Investigation Report UTC Business amp Industrial Systems Pittsfield Maine September 17 2015)
Characteri7ation of SVifU 22 a petroleum LNPL site indicates there were no Maine Exposure Guidelines (MEGs) exceedances for volatile organic compounds and the groundwater sampling in the vicinity ofSWMU 22 does not indicate that the LNAPL is resulting in extractable petroleum hydrocarbons (EPH) above the (i-lEGs) Forensics analysis indicates that the product is weather heavy oil that bas been in the subsurface for IO to 20 years There is no evidence that the petroleum is migrating to the surface water
The area is serviced by public water and there are no water supply wells within 2000 feet oftlie site
Foorno1cs 1 existing area ofcontaminated groundwater is an area (wilh horizontal and vertical dimensions) that has been verifiably demonstrated to contain alt relevant groundwater contamination for ~1is delennination and is defined by designated (monitoring) locations proximate tu lhe outer perimeter ofcontamina1ion that can and will be sampled1es1cd in the future to physically verify that nll contuminuled groundwater remains within this arct and lhat the fiirtl1er migration ofconlaminated _groundwater i_ 1101 occurring Reasonable allowances in the proximity of the monitoring locations are pennissiblc to incorporale fomrnl remedy decisions (ie including public participation) allowing u limited area for nuiurat attenuation
Migration or Contaminated Groundwnter Under Control Environmental Indicator (El) RCRIS code (CA750)
Page 4
4 Does contaminated groundwater discharge into surface water bodies
_X_ Ifyes - continue after identif)bulling potentially affected surface water bodies
If no - skip to 7 (and enter a YE status code in 8 if7 ~ yes) after providing an explanation andor referencing documcntation supporting tbat groundwater contamination does not enter surface water bodies
If unknown - skip to 8 and enter IN status code
Rationale and Reference(s) Final RFI report UTC Business and Industrial Systems Pittsfield Maine September 17 2015 Pore water sampling results identified low to trace levels ofthree VOC contaminants two of which were less than 10 X their appropriate standard the (Maine Exposure Guidelines dated October 19 20 12 ) and one that exceeded IO X the standard but is below the I 00 X standard ( see table 2) No metals were detected in pore water sampling The groundwater discharges to the Scbasticook River a class C water
Discharges to class C waters may cause some changes to the aquatic environment except they must be of sufficient quality to support indigenous fish and maintain the stmcn1re ofand function ofthe residential biologic conununity Class C waters may be used for industrial process water and cooling water for electrical generation
Existing groundwater monitoring data indicates a limited number of low levels ofsolvent and metal detections in the groundwater that could migrate to the river over a thin andor limited width area along the river Observations of extensive bedrock outcrop along the shore ofthe river adjacent to the site suggest limited habitat for benthic communities consisting of localized small pockets of sand between rock layers
Migration of Contaminlltcd Groundwater Under Control Envfronmentnl Indicator (EI) RCRIS code (CA750)
Page 5
5 Is the disrlrnrge ofcontaminated groundwater into surface water likely to be insignificant (ie the maximum concemration3 ofeach contaminant discharging into surface water is less than IO times their appropriate groundwater level and there are no other conditions (eg the nature and number of discharging contaminants or environmental setting) which significantly increase the potential for unacceptable impacts to surface water sediments or eco-systems at these concentrations)
Ifyes - skip to 7 (and cnter YE stan1s code in IJ8 if17 = yes) after documenting I) the maximum kJ1own or reasonably suspected concentration3 of sfil contaminants discharged above their groundwater level the value of the appropriate level(s) and if there is evidence that the concentrations are increasing and 2) provide a statement of professional judgementexplanation (or reference documentation) supporting that the discharge ofgroundwater contaminants into the surface water is not anticipated to have unacceptable impacts to the receiving surtace water sediments or eco-system
_X_ lf no - (the discharge ofcontaminated groundwater into surface water is potentially significant) - continue after documeniing I) the maximum known or reasonably suspected concentration3 ofeach contaminant discliarged above its groundwater level the value ofthe appropriate level(s) and ifthere is evidence that the concentrations are increasing and 2) for any contaminants discharging into surface water in concentrations3
greater than JOO times their appropriate groundwater levels the estimated total amount (mass in kgyr) ofeach ofthese contaminants that are being discharged (loaded) into the surface water body (at the time ofthe dctem1ination) and identify ifthere is evidence that the amount ofdischarging contaminants is increasing
If unknown - enter IN status code in 18
Rationale and Reference(s) Final RFI repo11 UTC Business and Industrial Systems Pittsfield Maine September 17 2015 Pore water sampling results identified low to trace levels ofthree contaminants two of which were less than 10 X their appropriate standard the (Maine Exposure Guidelines dated October 19 2012 ) and one that exceeded IO X the standard but is below the I 00 X standard ( sec table 2)
Based on estimates ofgroundwater flux beneath the site and recorded minimum river flows groundwater is expected to be diluted on the order of500 fold when it discharges to and mixes with the river water (Final RCRA Facility Investigation Report UTC Business amp Industrial Systems Pittsfield Maine September 17 2015)
loo1no1cs As measured in grounltl~tler prior to entry to the gronndwatcr-surfocc waterstdiment internetion (eg hyporhcic) zone
Migration of Contaminated Grou11dw11te1middot Under Control Envh-onmenlal Indicator (El) RCIUS code (CA750)
Page 7
7 Will groundwater monitoring measurement data (and surface watersedimentecological data as necessary) be collected iu the future to verify that contaminated groundwater has remained within the horizontal (or vertical as necessary) dimensions of the existing area ofcontaminated groundwater
_ X_ Ifyes - continue after providing or citing documentation for planned activities or future samplingmeasurement events Specifically identify the wellmeasurement locations which will be tested in the future to verify the expectation (identified in ff3) that groundwater contamination will not be migrating horizontally (or vertically as necessary) beyond the middotexisting area ofgroundwater contamination
If no - enter middotmiddotNO stan1s code in 8
If unknown - cnterIN stan1s code in 8
Rationale and Reterence(s)
A groundwater monitoring plan will be established utiliting selected groundwater monitoring well locations and parameters to include volatile organic compounds and metals total and dissolved at ERtvl-6 and ERM-10 at central well fence locations between the building and the river
Develop a long tenn management plan for SWMU 22 to ensure that LNAPL is not migrating to the river or offsite
o Long term monitoring of selected wells for the presence and or thickness of free product o Establish criteria against which monitoring results could be compared to allow for a determination
that conditions had changed and that the LNAPL was mobile and moving toward the river or off site
o A conceptual design for a contingent recovery system in the event the established criteria are not met
Migratio11 of Contamiunted Groundwater Under Control Environmental Indicator (EI) RCIUS code (CA7S0)
Page 8
Based on estimates ofgroundwater flux beneath the site and recorded minimum river flows groundwater is expected to be diluted on the order of 500 told when it discharges lo and mixes with the river water (Final RCRA Facility investigation Report UTC Business amp Industrial Systems Pittsfield Maine September 17 2015) This would dilute the vinyl chloride discharge from 168 ug1 to well under the 02 ug1 MEG standard
Footnotes Nole because areas of iullowing groundwater can be critical habitats (eg nurseries or thennal relilgia) for many species appropriate specialist (eg ecologist) should be included in management dcdsions 1ha1 could eliminate these areas by signilicanll) altering or reversing groundwulcr llow pathways near surface waler bodies
The 1111krstm1ding ofthe impacts ofcontaminated groundwater discharges into surfoc wutcr bodies is 1 rapidly developing field and reviewers are encouraged to look 10 the latest guidance for the appropriate methods and scale of lcmonslrntion to be reasonably certain that discharges are not causing currently unacccplitblc impacts lo the surface waters sltdimcnls or ~o-systems
8 Check the appropriate RCRJS status codes for the Migration ofContaminated Groundwater Under Control El (event code CA750) and obtain Supervisor (or appropriate Manager) signature and date on the EI determination below ( attach appropriate supporting documentation as well as a map of the facility)
X YE - Yes Migration ofContaminated Groundwater Under Control has been verified Based on a review of the information contained in this Ef determination it has been determined that the Migration ofContaminated Groundwater is Under Control at the United Technologies Corporation (UTC) Climate Controls amp Security facility EPA TD MED 001106293 located at_ 129 No1th Street Pittsfield Somerset County Maine Specifically this detennination indicates that the migration ofcontaminated groundwater is under control and that monitoring will be conducted to confom that contaminated groundwater remains within the existing area of contaminated groundwater This determination will be re-evaluated when the Agency becomes aw~1rc ofsignificant changes at the facility
NO - Unacceptable migration ofcontaminated groundwater is observed or expected
IN - More information is needed to make a determination
Date P-Supervisor si nature
(EPA Region or State)
Locations where References may be found
JMnL t~~~ ~rv ltLtz Abii
Contact telephone and e-mail numbers
(name)___ ______ _____ (phone)_ ___________ (e-mail)___ ____ _ ____ _
Table 1 Groundwater exceedances only
UTC BIS Pittsfield Maine 2013-2014
I Parameter MEG Units GW-204 GW-208 GW -209 GW-210 GW-211 GW-212 GW-212 GW-2014 GW-2i4 lOX lOOX 2013 2013 2013 2013 2013 2013 2014 2013 2014 St d Std
14 Dioxane 4 UgI 734 25U 126 25U 40 400 Chromium 20 Ug I 564 194 467 133 211 200 2000 Lead 10 UgI 145 37 475 296 48 I 100 1000 Nickle 20 UgI 132 308 105 200 2000 Vinyl 02 UgI 061J 2 20 Chloride Cyanide 4 UgI 42J 40 400
Table 1 continued
Parameter
Chromium
Lead Nickle
MEG
20 10 20
Units
UgI UgI UgI
GW-215 2013 268 538 244
GW-2017 2013
59 628 475
l0X Standard
200 100 200
l00X Standard
2000 1000 2000
Metals total Maine Exposure Guidelines (MEG) May 8 2013 (corrected October 2013) U-below method detection limit Concentrations of metals in four dissolved samples taken at (GW-208 GW-210 GW-211 and GW-215) were below the MEG
Table 2 Pore Water Detections
Exceedances only
Parameter Maine Exposure Units PW-111 6252014 10 X Standard 100 X Standard Guideline
Cis-12-Dichloroethene 10 ugL 206 100 1000 Trichloroethene 4 ugL 7 40 400
Vinyl chloride 02 ugL 168 2 20
Migration ofCoutaminntcd Groundwater Under Control Envirnnmcntal [ndicator (El) RCRIS code (CA 750)
Page 3
3 Has the migration of contaminated groundwater stabilized (such that contaminated groundwater is expected to remain will1in existing area ofcontaminated groundwater2 as ddined by the monitoring locations designated at the time of this detennination)
_X_ If yes - continue after presenting or referencing tl1e physical evidence (eg groundwater samplingmeasurementmigration barrier data) and rationale why coutaminated grouudwater is expected to remain withiu the (horizontal or vertical) dimensions ofthe existing area ofgroundwater contamination2
)
lfno (contaminated groundwater is observed or expected to migrate beyond the designated locations defining the existing area of groundwater contamination2
) - skip to 8 and enter NO status code after providing an explanation
If unknown - skip to 8 and enter IN status code
Rationale and Reforence(s) ___ The VOC zone iu groundwater is limited to an approximate 200 foot length with the most elevated level contained within an approximate 80 foot length between GWB-214 and GWB-2 l 0 Due to the presence ofshallow bedrock in the river bed the migration pathways tlumiddotough saturated soil to the river are thin and intenninent (ie absent at locations where bedrock rises above the ground water table) For a majority of the yenr groundwater is interpreted to discharge from soils beneath the Site into the river given the regional valley location oftl1e Site Based on the observed connection between water levels in wells and in the river the river is expected to recharge the groundwater during only brief periods ofhigh flow when river levels are higher than groundwater Flow into the bedrock is expected to be impeded in areas by the presence of low permeability glacial till that overlies a majority ofthe bedrock surface Based on estimates ofgroundwater nux beneath the site and recorded minimum river flows groundwater is expected to be diluted on the order of 500 fold when it discharges to and mixes with the river water (Final RCRA Facility Investigation Report UTC Business amp Industrial Systems Pittsfield Maine September 17 2015)
Characteri7ation of SVifU 22 a petroleum LNPL site indicates there were no Maine Exposure Guidelines (MEGs) exceedances for volatile organic compounds and the groundwater sampling in the vicinity ofSWMU 22 does not indicate that the LNAPL is resulting in extractable petroleum hydrocarbons (EPH) above the (i-lEGs) Forensics analysis indicates that the product is weather heavy oil that bas been in the subsurface for IO to 20 years There is no evidence that the petroleum is migrating to the surface water
The area is serviced by public water and there are no water supply wells within 2000 feet oftlie site
Foorno1cs 1 existing area ofcontaminated groundwater is an area (wilh horizontal and vertical dimensions) that has been verifiably demonstrated to contain alt relevant groundwater contamination for ~1is delennination and is defined by designated (monitoring) locations proximate tu lhe outer perimeter ofcontamina1ion that can and will be sampled1es1cd in the future to physically verify that nll contuminuled groundwater remains within this arct and lhat the fiirtl1er migration ofconlaminated _groundwater i_ 1101 occurring Reasonable allowances in the proximity of the monitoring locations are pennissiblc to incorporale fomrnl remedy decisions (ie including public participation) allowing u limited area for nuiurat attenuation
Migration or Contaminated Groundwnter Under Control Environmental Indicator (El) RCRIS code (CA750)
Page 4
4 Does contaminated groundwater discharge into surface water bodies
_X_ Ifyes - continue after identif)bulling potentially affected surface water bodies
If no - skip to 7 (and enter a YE status code in 8 if7 ~ yes) after providing an explanation andor referencing documcntation supporting tbat groundwater contamination does not enter surface water bodies
If unknown - skip to 8 and enter IN status code
Rationale and Reference(s) Final RFI report UTC Business and Industrial Systems Pittsfield Maine September 17 2015 Pore water sampling results identified low to trace levels ofthree VOC contaminants two of which were less than 10 X their appropriate standard the (Maine Exposure Guidelines dated October 19 20 12 ) and one that exceeded IO X the standard but is below the I 00 X standard ( see table 2) No metals were detected in pore water sampling The groundwater discharges to the Scbasticook River a class C water
Discharges to class C waters may cause some changes to the aquatic environment except they must be of sufficient quality to support indigenous fish and maintain the stmcn1re ofand function ofthe residential biologic conununity Class C waters may be used for industrial process water and cooling water for electrical generation
Existing groundwater monitoring data indicates a limited number of low levels ofsolvent and metal detections in the groundwater that could migrate to the river over a thin andor limited width area along the river Observations of extensive bedrock outcrop along the shore ofthe river adjacent to the site suggest limited habitat for benthic communities consisting of localized small pockets of sand between rock layers
Migration of Contaminlltcd Groundwater Under Control Envfronmentnl Indicator (EI) RCRIS code (CA750)
Page 5
5 Is the disrlrnrge ofcontaminated groundwater into surface water likely to be insignificant (ie the maximum concemration3 ofeach contaminant discharging into surface water is less than IO times their appropriate groundwater level and there are no other conditions (eg the nature and number of discharging contaminants or environmental setting) which significantly increase the potential for unacceptable impacts to surface water sediments or eco-systems at these concentrations)
Ifyes - skip to 7 (and cnter YE stan1s code in IJ8 if17 = yes) after documenting I) the maximum kJ1own or reasonably suspected concentration3 of sfil contaminants discharged above their groundwater level the value of the appropriate level(s) and if there is evidence that the concentrations are increasing and 2) provide a statement of professional judgementexplanation (or reference documentation) supporting that the discharge ofgroundwater contaminants into the surface water is not anticipated to have unacceptable impacts to the receiving surtace water sediments or eco-system
_X_ lf no - (the discharge ofcontaminated groundwater into surface water is potentially significant) - continue after documeniing I) the maximum known or reasonably suspected concentration3 ofeach contaminant discliarged above its groundwater level the value ofthe appropriate level(s) and ifthere is evidence that the concentrations are increasing and 2) for any contaminants discharging into surface water in concentrations3
greater than JOO times their appropriate groundwater levels the estimated total amount (mass in kgyr) ofeach ofthese contaminants that are being discharged (loaded) into the surface water body (at the time ofthe dctem1ination) and identify ifthere is evidence that the amount ofdischarging contaminants is increasing
If unknown - enter IN status code in 18
Rationale and Reference(s) Final RFI repo11 UTC Business and Industrial Systems Pittsfield Maine September 17 2015 Pore water sampling results identified low to trace levels ofthree contaminants two of which were less than 10 X their appropriate standard the (Maine Exposure Guidelines dated October 19 2012 ) and one that exceeded IO X the standard but is below the I 00 X standard ( sec table 2)
Based on estimates ofgroundwater flux beneath the site and recorded minimum river flows groundwater is expected to be diluted on the order of500 fold when it discharges to and mixes with the river water (Final RCRA Facility Investigation Report UTC Business amp Industrial Systems Pittsfield Maine September 17 2015)
loo1no1cs As measured in grounltl~tler prior to entry to the gronndwatcr-surfocc waterstdiment internetion (eg hyporhcic) zone
Migration of Contaminated Grou11dw11te1middot Under Control Envh-onmenlal Indicator (El) RCIUS code (CA750)
Page 7
7 Will groundwater monitoring measurement data (and surface watersedimentecological data as necessary) be collected iu the future to verify that contaminated groundwater has remained within the horizontal (or vertical as necessary) dimensions of the existing area ofcontaminated groundwater
_ X_ Ifyes - continue after providing or citing documentation for planned activities or future samplingmeasurement events Specifically identify the wellmeasurement locations which will be tested in the future to verify the expectation (identified in ff3) that groundwater contamination will not be migrating horizontally (or vertically as necessary) beyond the middotexisting area ofgroundwater contamination
If no - enter middotmiddotNO stan1s code in 8
If unknown - cnterIN stan1s code in 8
Rationale and Reterence(s)
A groundwater monitoring plan will be established utiliting selected groundwater monitoring well locations and parameters to include volatile organic compounds and metals total and dissolved at ERtvl-6 and ERM-10 at central well fence locations between the building and the river
Develop a long tenn management plan for SWMU 22 to ensure that LNAPL is not migrating to the river or offsite
o Long term monitoring of selected wells for the presence and or thickness of free product o Establish criteria against which monitoring results could be compared to allow for a determination
that conditions had changed and that the LNAPL was mobile and moving toward the river or off site
o A conceptual design for a contingent recovery system in the event the established criteria are not met
Migratio11 of Contamiunted Groundwater Under Control Environmental Indicator (EI) RCIUS code (CA7S0)
Page 8
Based on estimates ofgroundwater flux beneath the site and recorded minimum river flows groundwater is expected to be diluted on the order of 500 told when it discharges lo and mixes with the river water (Final RCRA Facility investigation Report UTC Business amp Industrial Systems Pittsfield Maine September 17 2015) This would dilute the vinyl chloride discharge from 168 ug1 to well under the 02 ug1 MEG standard
Footnotes Nole because areas of iullowing groundwater can be critical habitats (eg nurseries or thennal relilgia) for many species appropriate specialist (eg ecologist) should be included in management dcdsions 1ha1 could eliminate these areas by signilicanll) altering or reversing groundwulcr llow pathways near surface waler bodies
The 1111krstm1ding ofthe impacts ofcontaminated groundwater discharges into surfoc wutcr bodies is 1 rapidly developing field and reviewers are encouraged to look 10 the latest guidance for the appropriate methods and scale of lcmonslrntion to be reasonably certain that discharges are not causing currently unacccplitblc impacts lo the surface waters sltdimcnls or ~o-systems
8 Check the appropriate RCRJS status codes for the Migration ofContaminated Groundwater Under Control El (event code CA750) and obtain Supervisor (or appropriate Manager) signature and date on the EI determination below ( attach appropriate supporting documentation as well as a map of the facility)
X YE - Yes Migration ofContaminated Groundwater Under Control has been verified Based on a review of the information contained in this Ef determination it has been determined that the Migration ofContaminated Groundwater is Under Control at the United Technologies Corporation (UTC) Climate Controls amp Security facility EPA TD MED 001106293 located at_ 129 No1th Street Pittsfield Somerset County Maine Specifically this detennination indicates that the migration ofcontaminated groundwater is under control and that monitoring will be conducted to confom that contaminated groundwater remains within the existing area of contaminated groundwater This determination will be re-evaluated when the Agency becomes aw~1rc ofsignificant changes at the facility
NO - Unacceptable migration ofcontaminated groundwater is observed or expected
IN - More information is needed to make a determination
Date P-Supervisor si nature
(EPA Region or State)
Locations where References may be found
JMnL t~~~ ~rv ltLtz Abii
Contact telephone and e-mail numbers
(name)___ ______ _____ (phone)_ ___________ (e-mail)___ ____ _ ____ _
Table 1 Groundwater exceedances only
UTC BIS Pittsfield Maine 2013-2014
I Parameter MEG Units GW-204 GW-208 GW -209 GW-210 GW-211 GW-212 GW-212 GW-2014 GW-2i4 lOX lOOX 2013 2013 2013 2013 2013 2013 2014 2013 2014 St d Std
14 Dioxane 4 UgI 734 25U 126 25U 40 400 Chromium 20 Ug I 564 194 467 133 211 200 2000 Lead 10 UgI 145 37 475 296 48 I 100 1000 Nickle 20 UgI 132 308 105 200 2000 Vinyl 02 UgI 061J 2 20 Chloride Cyanide 4 UgI 42J 40 400
Table 1 continued
Parameter
Chromium
Lead Nickle
MEG
20 10 20
Units
UgI UgI UgI
GW-215 2013 268 538 244
GW-2017 2013
59 628 475
l0X Standard
200 100 200
l00X Standard
2000 1000 2000
Metals total Maine Exposure Guidelines (MEG) May 8 2013 (corrected October 2013) U-below method detection limit Concentrations of metals in four dissolved samples taken at (GW-208 GW-210 GW-211 and GW-215) were below the MEG
Table 2 Pore Water Detections
Exceedances only
Parameter Maine Exposure Units PW-111 6252014 10 X Standard 100 X Standard Guideline
Cis-12-Dichloroethene 10 ugL 206 100 1000 Trichloroethene 4 ugL 7 40 400
Vinyl chloride 02 ugL 168 2 20
Migration or Contaminated Groundwnter Under Control Environmental Indicator (El) RCRIS code (CA750)
Page 4
4 Does contaminated groundwater discharge into surface water bodies
_X_ Ifyes - continue after identif)bulling potentially affected surface water bodies
If no - skip to 7 (and enter a YE status code in 8 if7 ~ yes) after providing an explanation andor referencing documcntation supporting tbat groundwater contamination does not enter surface water bodies
If unknown - skip to 8 and enter IN status code
Rationale and Reference(s) Final RFI report UTC Business and Industrial Systems Pittsfield Maine September 17 2015 Pore water sampling results identified low to trace levels ofthree VOC contaminants two of which were less than 10 X their appropriate standard the (Maine Exposure Guidelines dated October 19 20 12 ) and one that exceeded IO X the standard but is below the I 00 X standard ( see table 2) No metals were detected in pore water sampling The groundwater discharges to the Scbasticook River a class C water
Discharges to class C waters may cause some changes to the aquatic environment except they must be of sufficient quality to support indigenous fish and maintain the stmcn1re ofand function ofthe residential biologic conununity Class C waters may be used for industrial process water and cooling water for electrical generation
Existing groundwater monitoring data indicates a limited number of low levels ofsolvent and metal detections in the groundwater that could migrate to the river over a thin andor limited width area along the river Observations of extensive bedrock outcrop along the shore ofthe river adjacent to the site suggest limited habitat for benthic communities consisting of localized small pockets of sand between rock layers
Migration of Contaminlltcd Groundwater Under Control Envfronmentnl Indicator (EI) RCRIS code (CA750)
Page 5
5 Is the disrlrnrge ofcontaminated groundwater into surface water likely to be insignificant (ie the maximum concemration3 ofeach contaminant discharging into surface water is less than IO times their appropriate groundwater level and there are no other conditions (eg the nature and number of discharging contaminants or environmental setting) which significantly increase the potential for unacceptable impacts to surface water sediments or eco-systems at these concentrations)
Ifyes - skip to 7 (and cnter YE stan1s code in IJ8 if17 = yes) after documenting I) the maximum kJ1own or reasonably suspected concentration3 of sfil contaminants discharged above their groundwater level the value of the appropriate level(s) and if there is evidence that the concentrations are increasing and 2) provide a statement of professional judgementexplanation (or reference documentation) supporting that the discharge ofgroundwater contaminants into the surface water is not anticipated to have unacceptable impacts to the receiving surtace water sediments or eco-system
_X_ lf no - (the discharge ofcontaminated groundwater into surface water is potentially significant) - continue after documeniing I) the maximum known or reasonably suspected concentration3 ofeach contaminant discliarged above its groundwater level the value ofthe appropriate level(s) and ifthere is evidence that the concentrations are increasing and 2) for any contaminants discharging into surface water in concentrations3
greater than JOO times their appropriate groundwater levels the estimated total amount (mass in kgyr) ofeach ofthese contaminants that are being discharged (loaded) into the surface water body (at the time ofthe dctem1ination) and identify ifthere is evidence that the amount ofdischarging contaminants is increasing
If unknown - enter IN status code in 18
Rationale and Reference(s) Final RFI repo11 UTC Business and Industrial Systems Pittsfield Maine September 17 2015 Pore water sampling results identified low to trace levels ofthree contaminants two of which were less than 10 X their appropriate standard the (Maine Exposure Guidelines dated October 19 2012 ) and one that exceeded IO X the standard but is below the I 00 X standard ( sec table 2)
Based on estimates ofgroundwater flux beneath the site and recorded minimum river flows groundwater is expected to be diluted on the order of500 fold when it discharges to and mixes with the river water (Final RCRA Facility Investigation Report UTC Business amp Industrial Systems Pittsfield Maine September 17 2015)
loo1no1cs As measured in grounltl~tler prior to entry to the gronndwatcr-surfocc waterstdiment internetion (eg hyporhcic) zone
Migration of Contaminated Grou11dw11te1middot Under Control Envh-onmenlal Indicator (El) RCIUS code (CA750)
Page 7
7 Will groundwater monitoring measurement data (and surface watersedimentecological data as necessary) be collected iu the future to verify that contaminated groundwater has remained within the horizontal (or vertical as necessary) dimensions of the existing area ofcontaminated groundwater
_ X_ Ifyes - continue after providing or citing documentation for planned activities or future samplingmeasurement events Specifically identify the wellmeasurement locations which will be tested in the future to verify the expectation (identified in ff3) that groundwater contamination will not be migrating horizontally (or vertically as necessary) beyond the middotexisting area ofgroundwater contamination
If no - enter middotmiddotNO stan1s code in 8
If unknown - cnterIN stan1s code in 8
Rationale and Reterence(s)
A groundwater monitoring plan will be established utiliting selected groundwater monitoring well locations and parameters to include volatile organic compounds and metals total and dissolved at ERtvl-6 and ERM-10 at central well fence locations between the building and the river
Develop a long tenn management plan for SWMU 22 to ensure that LNAPL is not migrating to the river or offsite
o Long term monitoring of selected wells for the presence and or thickness of free product o Establish criteria against which monitoring results could be compared to allow for a determination
that conditions had changed and that the LNAPL was mobile and moving toward the river or off site
o A conceptual design for a contingent recovery system in the event the established criteria are not met
Migratio11 of Contamiunted Groundwater Under Control Environmental Indicator (EI) RCIUS code (CA7S0)
Page 8
Based on estimates ofgroundwater flux beneath the site and recorded minimum river flows groundwater is expected to be diluted on the order of 500 told when it discharges lo and mixes with the river water (Final RCRA Facility investigation Report UTC Business amp Industrial Systems Pittsfield Maine September 17 2015) This would dilute the vinyl chloride discharge from 168 ug1 to well under the 02 ug1 MEG standard
Footnotes Nole because areas of iullowing groundwater can be critical habitats (eg nurseries or thennal relilgia) for many species appropriate specialist (eg ecologist) should be included in management dcdsions 1ha1 could eliminate these areas by signilicanll) altering or reversing groundwulcr llow pathways near surface waler bodies
The 1111krstm1ding ofthe impacts ofcontaminated groundwater discharges into surfoc wutcr bodies is 1 rapidly developing field and reviewers are encouraged to look 10 the latest guidance for the appropriate methods and scale of lcmonslrntion to be reasonably certain that discharges are not causing currently unacccplitblc impacts lo the surface waters sltdimcnls or ~o-systems
8 Check the appropriate RCRJS status codes for the Migration ofContaminated Groundwater Under Control El (event code CA750) and obtain Supervisor (or appropriate Manager) signature and date on the EI determination below ( attach appropriate supporting documentation as well as a map of the facility)
X YE - Yes Migration ofContaminated Groundwater Under Control has been verified Based on a review of the information contained in this Ef determination it has been determined that the Migration ofContaminated Groundwater is Under Control at the United Technologies Corporation (UTC) Climate Controls amp Security facility EPA TD MED 001106293 located at_ 129 No1th Street Pittsfield Somerset County Maine Specifically this detennination indicates that the migration ofcontaminated groundwater is under control and that monitoring will be conducted to confom that contaminated groundwater remains within the existing area of contaminated groundwater This determination will be re-evaluated when the Agency becomes aw~1rc ofsignificant changes at the facility
NO - Unacceptable migration ofcontaminated groundwater is observed or expected
IN - More information is needed to make a determination
Date P-Supervisor si nature
(EPA Region or State)
Locations where References may be found
JMnL t~~~ ~rv ltLtz Abii
Contact telephone and e-mail numbers
(name)___ ______ _____ (phone)_ ___________ (e-mail)___ ____ _ ____ _
Table 1 Groundwater exceedances only
UTC BIS Pittsfield Maine 2013-2014
I Parameter MEG Units GW-204 GW-208 GW -209 GW-210 GW-211 GW-212 GW-212 GW-2014 GW-2i4 lOX lOOX 2013 2013 2013 2013 2013 2013 2014 2013 2014 St d Std
14 Dioxane 4 UgI 734 25U 126 25U 40 400 Chromium 20 Ug I 564 194 467 133 211 200 2000 Lead 10 UgI 145 37 475 296 48 I 100 1000 Nickle 20 UgI 132 308 105 200 2000 Vinyl 02 UgI 061J 2 20 Chloride Cyanide 4 UgI 42J 40 400
Table 1 continued
Parameter
Chromium
Lead Nickle
MEG
20 10 20
Units
UgI UgI UgI
GW-215 2013 268 538 244
GW-2017 2013
59 628 475
l0X Standard
200 100 200
l00X Standard
2000 1000 2000
Metals total Maine Exposure Guidelines (MEG) May 8 2013 (corrected October 2013) U-below method detection limit Concentrations of metals in four dissolved samples taken at (GW-208 GW-210 GW-211 and GW-215) were below the MEG
Table 2 Pore Water Detections
Exceedances only
Parameter Maine Exposure Units PW-111 6252014 10 X Standard 100 X Standard Guideline
Cis-12-Dichloroethene 10 ugL 206 100 1000 Trichloroethene 4 ugL 7 40 400
Vinyl chloride 02 ugL 168 2 20
Migration of Contaminlltcd Groundwater Under Control Envfronmentnl Indicator (EI) RCRIS code (CA750)
Page 5
5 Is the disrlrnrge ofcontaminated groundwater into surface water likely to be insignificant (ie the maximum concemration3 ofeach contaminant discharging into surface water is less than IO times their appropriate groundwater level and there are no other conditions (eg the nature and number of discharging contaminants or environmental setting) which significantly increase the potential for unacceptable impacts to surface water sediments or eco-systems at these concentrations)
Ifyes - skip to 7 (and cnter YE stan1s code in IJ8 if17 = yes) after documenting I) the maximum kJ1own or reasonably suspected concentration3 of sfil contaminants discharged above their groundwater level the value of the appropriate level(s) and if there is evidence that the concentrations are increasing and 2) provide a statement of professional judgementexplanation (or reference documentation) supporting that the discharge ofgroundwater contaminants into the surface water is not anticipated to have unacceptable impacts to the receiving surtace water sediments or eco-system
_X_ lf no - (the discharge ofcontaminated groundwater into surface water is potentially significant) - continue after documeniing I) the maximum known or reasonably suspected concentration3 ofeach contaminant discliarged above its groundwater level the value ofthe appropriate level(s) and ifthere is evidence that the concentrations are increasing and 2) for any contaminants discharging into surface water in concentrations3
greater than JOO times their appropriate groundwater levels the estimated total amount (mass in kgyr) ofeach ofthese contaminants that are being discharged (loaded) into the surface water body (at the time ofthe dctem1ination) and identify ifthere is evidence that the amount ofdischarging contaminants is increasing
If unknown - enter IN status code in 18
Rationale and Reference(s) Final RFI repo11 UTC Business and Industrial Systems Pittsfield Maine September 17 2015 Pore water sampling results identified low to trace levels ofthree contaminants two of which were less than 10 X their appropriate standard the (Maine Exposure Guidelines dated October 19 2012 ) and one that exceeded IO X the standard but is below the I 00 X standard ( sec table 2)
Based on estimates ofgroundwater flux beneath the site and recorded minimum river flows groundwater is expected to be diluted on the order of500 fold when it discharges to and mixes with the river water (Final RCRA Facility Investigation Report UTC Business amp Industrial Systems Pittsfield Maine September 17 2015)
loo1no1cs As measured in grounltl~tler prior to entry to the gronndwatcr-surfocc waterstdiment internetion (eg hyporhcic) zone
Migration of Contaminated Grou11dw11te1middot Under Control Envh-onmenlal Indicator (El) RCIUS code (CA750)
Page 7
7 Will groundwater monitoring measurement data (and surface watersedimentecological data as necessary) be collected iu the future to verify that contaminated groundwater has remained within the horizontal (or vertical as necessary) dimensions of the existing area ofcontaminated groundwater
_ X_ Ifyes - continue after providing or citing documentation for planned activities or future samplingmeasurement events Specifically identify the wellmeasurement locations which will be tested in the future to verify the expectation (identified in ff3) that groundwater contamination will not be migrating horizontally (or vertically as necessary) beyond the middotexisting area ofgroundwater contamination
If no - enter middotmiddotNO stan1s code in 8
If unknown - cnterIN stan1s code in 8
Rationale and Reterence(s)
A groundwater monitoring plan will be established utiliting selected groundwater monitoring well locations and parameters to include volatile organic compounds and metals total and dissolved at ERtvl-6 and ERM-10 at central well fence locations between the building and the river
Develop a long tenn management plan for SWMU 22 to ensure that LNAPL is not migrating to the river or offsite
o Long term monitoring of selected wells for the presence and or thickness of free product o Establish criteria against which monitoring results could be compared to allow for a determination
that conditions had changed and that the LNAPL was mobile and moving toward the river or off site
o A conceptual design for a contingent recovery system in the event the established criteria are not met
Migratio11 of Contamiunted Groundwater Under Control Environmental Indicator (EI) RCIUS code (CA7S0)
Page 8
Based on estimates ofgroundwater flux beneath the site and recorded minimum river flows groundwater is expected to be diluted on the order of 500 told when it discharges lo and mixes with the river water (Final RCRA Facility investigation Report UTC Business amp Industrial Systems Pittsfield Maine September 17 2015) This would dilute the vinyl chloride discharge from 168 ug1 to well under the 02 ug1 MEG standard
Footnotes Nole because areas of iullowing groundwater can be critical habitats (eg nurseries or thennal relilgia) for many species appropriate specialist (eg ecologist) should be included in management dcdsions 1ha1 could eliminate these areas by signilicanll) altering or reversing groundwulcr llow pathways near surface waler bodies
The 1111krstm1ding ofthe impacts ofcontaminated groundwater discharges into surfoc wutcr bodies is 1 rapidly developing field and reviewers are encouraged to look 10 the latest guidance for the appropriate methods and scale of lcmonslrntion to be reasonably certain that discharges are not causing currently unacccplitblc impacts lo the surface waters sltdimcnls or ~o-systems
8 Check the appropriate RCRJS status codes for the Migration ofContaminated Groundwater Under Control El (event code CA750) and obtain Supervisor (or appropriate Manager) signature and date on the EI determination below ( attach appropriate supporting documentation as well as a map of the facility)
X YE - Yes Migration ofContaminated Groundwater Under Control has been verified Based on a review of the information contained in this Ef determination it has been determined that the Migration ofContaminated Groundwater is Under Control at the United Technologies Corporation (UTC) Climate Controls amp Security facility EPA TD MED 001106293 located at_ 129 No1th Street Pittsfield Somerset County Maine Specifically this detennination indicates that the migration ofcontaminated groundwater is under control and that monitoring will be conducted to confom that contaminated groundwater remains within the existing area of contaminated groundwater This determination will be re-evaluated when the Agency becomes aw~1rc ofsignificant changes at the facility
NO - Unacceptable migration ofcontaminated groundwater is observed or expected
IN - More information is needed to make a determination
Date P-Supervisor si nature
(EPA Region or State)
Locations where References may be found
JMnL t~~~ ~rv ltLtz Abii
Contact telephone and e-mail numbers
(name)___ ______ _____ (phone)_ ___________ (e-mail)___ ____ _ ____ _
Table 1 Groundwater exceedances only
UTC BIS Pittsfield Maine 2013-2014
I Parameter MEG Units GW-204 GW-208 GW -209 GW-210 GW-211 GW-212 GW-212 GW-2014 GW-2i4 lOX lOOX 2013 2013 2013 2013 2013 2013 2014 2013 2014 St d Std
14 Dioxane 4 UgI 734 25U 126 25U 40 400 Chromium 20 Ug I 564 194 467 133 211 200 2000 Lead 10 UgI 145 37 475 296 48 I 100 1000 Nickle 20 UgI 132 308 105 200 2000 Vinyl 02 UgI 061J 2 20 Chloride Cyanide 4 UgI 42J 40 400
Table 1 continued
Parameter
Chromium
Lead Nickle
MEG
20 10 20
Units
UgI UgI UgI
GW-215 2013 268 538 244
GW-2017 2013
59 628 475
l0X Standard
200 100 200
l00X Standard
2000 1000 2000
Metals total Maine Exposure Guidelines (MEG) May 8 2013 (corrected October 2013) U-below method detection limit Concentrations of metals in four dissolved samples taken at (GW-208 GW-210 GW-211 and GW-215) were below the MEG
Table 2 Pore Water Detections
Exceedances only
Parameter Maine Exposure Units PW-111 6252014 10 X Standard 100 X Standard Guideline
Cis-12-Dichloroethene 10 ugL 206 100 1000 Trichloroethene 4 ugL 7 40 400
Vinyl chloride 02 ugL 168 2 20
Migration of Contaminated Grou11dw11te1middot Under Control Envh-onmenlal Indicator (El) RCIUS code (CA750)
Page 7
7 Will groundwater monitoring measurement data (and surface watersedimentecological data as necessary) be collected iu the future to verify that contaminated groundwater has remained within the horizontal (or vertical as necessary) dimensions of the existing area ofcontaminated groundwater
_ X_ Ifyes - continue after providing or citing documentation for planned activities or future samplingmeasurement events Specifically identify the wellmeasurement locations which will be tested in the future to verify the expectation (identified in ff3) that groundwater contamination will not be migrating horizontally (or vertically as necessary) beyond the middotexisting area ofgroundwater contamination
If no - enter middotmiddotNO stan1s code in 8
If unknown - cnterIN stan1s code in 8
Rationale and Reterence(s)
A groundwater monitoring plan will be established utiliting selected groundwater monitoring well locations and parameters to include volatile organic compounds and metals total and dissolved at ERtvl-6 and ERM-10 at central well fence locations between the building and the river
Develop a long tenn management plan for SWMU 22 to ensure that LNAPL is not migrating to the river or offsite
o Long term monitoring of selected wells for the presence and or thickness of free product o Establish criteria against which monitoring results could be compared to allow for a determination
that conditions had changed and that the LNAPL was mobile and moving toward the river or off site
o A conceptual design for a contingent recovery system in the event the established criteria are not met
Migratio11 of Contamiunted Groundwater Under Control Environmental Indicator (EI) RCIUS code (CA7S0)
Page 8
Based on estimates ofgroundwater flux beneath the site and recorded minimum river flows groundwater is expected to be diluted on the order of 500 told when it discharges lo and mixes with the river water (Final RCRA Facility investigation Report UTC Business amp Industrial Systems Pittsfield Maine September 17 2015) This would dilute the vinyl chloride discharge from 168 ug1 to well under the 02 ug1 MEG standard
Footnotes Nole because areas of iullowing groundwater can be critical habitats (eg nurseries or thennal relilgia) for many species appropriate specialist (eg ecologist) should be included in management dcdsions 1ha1 could eliminate these areas by signilicanll) altering or reversing groundwulcr llow pathways near surface waler bodies
The 1111krstm1ding ofthe impacts ofcontaminated groundwater discharges into surfoc wutcr bodies is 1 rapidly developing field and reviewers are encouraged to look 10 the latest guidance for the appropriate methods and scale of lcmonslrntion to be reasonably certain that discharges are not causing currently unacccplitblc impacts lo the surface waters sltdimcnls or ~o-systems
8 Check the appropriate RCRJS status codes for the Migration ofContaminated Groundwater Under Control El (event code CA750) and obtain Supervisor (or appropriate Manager) signature and date on the EI determination below ( attach appropriate supporting documentation as well as a map of the facility)
X YE - Yes Migration ofContaminated Groundwater Under Control has been verified Based on a review of the information contained in this Ef determination it has been determined that the Migration ofContaminated Groundwater is Under Control at the United Technologies Corporation (UTC) Climate Controls amp Security facility EPA TD MED 001106293 located at_ 129 No1th Street Pittsfield Somerset County Maine Specifically this detennination indicates that the migration ofcontaminated groundwater is under control and that monitoring will be conducted to confom that contaminated groundwater remains within the existing area of contaminated groundwater This determination will be re-evaluated when the Agency becomes aw~1rc ofsignificant changes at the facility
NO - Unacceptable migration ofcontaminated groundwater is observed or expected
IN - More information is needed to make a determination
Date P-Supervisor si nature
(EPA Region or State)
Locations where References may be found
JMnL t~~~ ~rv ltLtz Abii
Contact telephone and e-mail numbers
(name)___ ______ _____ (phone)_ ___________ (e-mail)___ ____ _ ____ _
Table 1 Groundwater exceedances only
UTC BIS Pittsfield Maine 2013-2014
I Parameter MEG Units GW-204 GW-208 GW -209 GW-210 GW-211 GW-212 GW-212 GW-2014 GW-2i4 lOX lOOX 2013 2013 2013 2013 2013 2013 2014 2013 2014 St d Std
14 Dioxane 4 UgI 734 25U 126 25U 40 400 Chromium 20 Ug I 564 194 467 133 211 200 2000 Lead 10 UgI 145 37 475 296 48 I 100 1000 Nickle 20 UgI 132 308 105 200 2000 Vinyl 02 UgI 061J 2 20 Chloride Cyanide 4 UgI 42J 40 400
Table 1 continued
Parameter
Chromium
Lead Nickle
MEG
20 10 20
Units
UgI UgI UgI
GW-215 2013 268 538 244
GW-2017 2013
59 628 475
l0X Standard
200 100 200
l00X Standard
2000 1000 2000
Metals total Maine Exposure Guidelines (MEG) May 8 2013 (corrected October 2013) U-below method detection limit Concentrations of metals in four dissolved samples taken at (GW-208 GW-210 GW-211 and GW-215) were below the MEG
Table 2 Pore Water Detections
Exceedances only
Parameter Maine Exposure Units PW-111 6252014 10 X Standard 100 X Standard Guideline
Cis-12-Dichloroethene 10 ugL 206 100 1000 Trichloroethene 4 ugL 7 40 400
Vinyl chloride 02 ugL 168 2 20
Based on estimates ofgroundwater flux beneath the site and recorded minimum river flows groundwater is expected to be diluted on the order of 500 told when it discharges lo and mixes with the river water (Final RCRA Facility investigation Report UTC Business amp Industrial Systems Pittsfield Maine September 17 2015) This would dilute the vinyl chloride discharge from 168 ug1 to well under the 02 ug1 MEG standard
Footnotes Nole because areas of iullowing groundwater can be critical habitats (eg nurseries or thennal relilgia) for many species appropriate specialist (eg ecologist) should be included in management dcdsions 1ha1 could eliminate these areas by signilicanll) altering or reversing groundwulcr llow pathways near surface waler bodies
The 1111krstm1ding ofthe impacts ofcontaminated groundwater discharges into surfoc wutcr bodies is 1 rapidly developing field and reviewers are encouraged to look 10 the latest guidance for the appropriate methods and scale of lcmonslrntion to be reasonably certain that discharges are not causing currently unacccplitblc impacts lo the surface waters sltdimcnls or ~o-systems
8 Check the appropriate RCRJS status codes for the Migration ofContaminated Groundwater Under Control El (event code CA750) and obtain Supervisor (or appropriate Manager) signature and date on the EI determination below ( attach appropriate supporting documentation as well as a map of the facility)
X YE - Yes Migration ofContaminated Groundwater Under Control has been verified Based on a review of the information contained in this Ef determination it has been determined that the Migration ofContaminated Groundwater is Under Control at the United Technologies Corporation (UTC) Climate Controls amp Security facility EPA TD MED 001106293 located at_ 129 No1th Street Pittsfield Somerset County Maine Specifically this detennination indicates that the migration ofcontaminated groundwater is under control and that monitoring will be conducted to confom that contaminated groundwater remains within the existing area of contaminated groundwater This determination will be re-evaluated when the Agency becomes aw~1rc ofsignificant changes at the facility
NO - Unacceptable migration ofcontaminated groundwater is observed or expected
IN - More information is needed to make a determination
Date P-Supervisor si nature
(EPA Region or State)
Locations where References may be found
JMnL t~~~ ~rv ltLtz Abii
Contact telephone and e-mail numbers
(name)___ ______ _____ (phone)_ ___________ (e-mail)___ ____ _ ____ _
Table 1 Groundwater exceedances only
UTC BIS Pittsfield Maine 2013-2014
I Parameter MEG Units GW-204 GW-208 GW -209 GW-210 GW-211 GW-212 GW-212 GW-2014 GW-2i4 lOX lOOX 2013 2013 2013 2013 2013 2013 2014 2013 2014 St d Std
14 Dioxane 4 UgI 734 25U 126 25U 40 400 Chromium 20 Ug I 564 194 467 133 211 200 2000 Lead 10 UgI 145 37 475 296 48 I 100 1000 Nickle 20 UgI 132 308 105 200 2000 Vinyl 02 UgI 061J 2 20 Chloride Cyanide 4 UgI 42J 40 400
Table 1 continued
Parameter
Chromium
Lead Nickle
MEG
20 10 20
Units
UgI UgI UgI
GW-215 2013 268 538 244
GW-2017 2013
59 628 475
l0X Standard
200 100 200
l00X Standard
2000 1000 2000
Metals total Maine Exposure Guidelines (MEG) May 8 2013 (corrected October 2013) U-below method detection limit Concentrations of metals in four dissolved samples taken at (GW-208 GW-210 GW-211 and GW-215) were below the MEG
Table 2 Pore Water Detections
Exceedances only
Parameter Maine Exposure Units PW-111 6252014 10 X Standard 100 X Standard Guideline
Cis-12-Dichloroethene 10 ugL 206 100 1000 Trichloroethene 4 ugL 7 40 400
Vinyl chloride 02 ugL 168 2 20
8 Check the appropriate RCRJS status codes for the Migration ofContaminated Groundwater Under Control El (event code CA750) and obtain Supervisor (or appropriate Manager) signature and date on the EI determination below ( attach appropriate supporting documentation as well as a map of the facility)
X YE - Yes Migration ofContaminated Groundwater Under Control has been verified Based on a review of the information contained in this Ef determination it has been determined that the Migration ofContaminated Groundwater is Under Control at the United Technologies Corporation (UTC) Climate Controls amp Security facility EPA TD MED 001106293 located at_ 129 No1th Street Pittsfield Somerset County Maine Specifically this detennination indicates that the migration ofcontaminated groundwater is under control and that monitoring will be conducted to confom that contaminated groundwater remains within the existing area of contaminated groundwater This determination will be re-evaluated when the Agency becomes aw~1rc ofsignificant changes at the facility
NO - Unacceptable migration ofcontaminated groundwater is observed or expected
IN - More information is needed to make a determination
Date P-Supervisor si nature
(EPA Region or State)
Locations where References may be found
JMnL t~~~ ~rv ltLtz Abii
Contact telephone and e-mail numbers
(name)___ ______ _____ (phone)_ ___________ (e-mail)___ ____ _ ____ _
Table 1 Groundwater exceedances only
UTC BIS Pittsfield Maine 2013-2014
I Parameter MEG Units GW-204 GW-208 GW -209 GW-210 GW-211 GW-212 GW-212 GW-2014 GW-2i4 lOX lOOX 2013 2013 2013 2013 2013 2013 2014 2013 2014 St d Std
14 Dioxane 4 UgI 734 25U 126 25U 40 400 Chromium 20 Ug I 564 194 467 133 211 200 2000 Lead 10 UgI 145 37 475 296 48 I 100 1000 Nickle 20 UgI 132 308 105 200 2000 Vinyl 02 UgI 061J 2 20 Chloride Cyanide 4 UgI 42J 40 400
Table 1 continued
Parameter
Chromium
Lead Nickle
MEG
20 10 20
Units
UgI UgI UgI
GW-215 2013 268 538 244
GW-2017 2013
59 628 475
l0X Standard
200 100 200
l00X Standard
2000 1000 2000
Metals total Maine Exposure Guidelines (MEG) May 8 2013 (corrected October 2013) U-below method detection limit Concentrations of metals in four dissolved samples taken at (GW-208 GW-210 GW-211 and GW-215) were below the MEG
Table 2 Pore Water Detections
Exceedances only
Parameter Maine Exposure Units PW-111 6252014 10 X Standard 100 X Standard Guideline
Cis-12-Dichloroethene 10 ugL 206 100 1000 Trichloroethene 4 ugL 7 40 400
Vinyl chloride 02 ugL 168 2 20
Contact telephone and e-mail numbers
(name)___ ______ _____ (phone)_ ___________ (e-mail)___ ____ _ ____ _
Table 1 Groundwater exceedances only
UTC BIS Pittsfield Maine 2013-2014
I Parameter MEG Units GW-204 GW-208 GW -209 GW-210 GW-211 GW-212 GW-212 GW-2014 GW-2i4 lOX lOOX 2013 2013 2013 2013 2013 2013 2014 2013 2014 St d Std
14 Dioxane 4 UgI 734 25U 126 25U 40 400 Chromium 20 Ug I 564 194 467 133 211 200 2000 Lead 10 UgI 145 37 475 296 48 I 100 1000 Nickle 20 UgI 132 308 105 200 2000 Vinyl 02 UgI 061J 2 20 Chloride Cyanide 4 UgI 42J 40 400
Table 1 continued
Parameter
Chromium
Lead Nickle
MEG
20 10 20
Units
UgI UgI UgI
GW-215 2013 268 538 244
GW-2017 2013
59 628 475
l0X Standard
200 100 200
l00X Standard
2000 1000 2000
Metals total Maine Exposure Guidelines (MEG) May 8 2013 (corrected October 2013) U-below method detection limit Concentrations of metals in four dissolved samples taken at (GW-208 GW-210 GW-211 and GW-215) were below the MEG
Table 2 Pore Water Detections
Exceedances only
Parameter Maine Exposure Units PW-111 6252014 10 X Standard 100 X Standard Guideline
Cis-12-Dichloroethene 10 ugL 206 100 1000 Trichloroethene 4 ugL 7 40 400
Vinyl chloride 02 ugL 168 2 20
Table 1 Groundwater exceedances only
UTC BIS Pittsfield Maine 2013-2014
I Parameter MEG Units GW-204 GW-208 GW -209 GW-210 GW-211 GW-212 GW-212 GW-2014 GW-2i4 lOX lOOX 2013 2013 2013 2013 2013 2013 2014 2013 2014 St d Std
14 Dioxane 4 UgI 734 25U 126 25U 40 400 Chromium 20 Ug I 564 194 467 133 211 200 2000 Lead 10 UgI 145 37 475 296 48 I 100 1000 Nickle 20 UgI 132 308 105 200 2000 Vinyl 02 UgI 061J 2 20 Chloride Cyanide 4 UgI 42J 40 400
Table 1 continued
Parameter
Chromium
Lead Nickle
MEG
20 10 20
Units
UgI UgI UgI
GW-215 2013 268 538 244
GW-2017 2013
59 628 475
l0X Standard
200 100 200
l00X Standard
2000 1000 2000
Metals total Maine Exposure Guidelines (MEG) May 8 2013 (corrected October 2013) U-below method detection limit Concentrations of metals in four dissolved samples taken at (GW-208 GW-210 GW-211 and GW-215) were below the MEG
Table 2 Pore Water Detections
Exceedances only
Parameter Maine Exposure Units PW-111 6252014 10 X Standard 100 X Standard Guideline
Cis-12-Dichloroethene 10 ugL 206 100 1000 Trichloroethene 4 ugL 7 40 400
Vinyl chloride 02 ugL 168 2 20
Table 2 Pore Water Detections
Exceedances only
Parameter Maine Exposure Units PW-111 6252014 10 X Standard 100 X Standard Guideline
Cis-12-Dichloroethene 10 ugL 206 100 1000 Trichloroethene 4 ugL 7 40 400
Vinyl chloride 02 ugL 168 2 20
