10047_Atherton Mill Final EMP 20161215

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EMP Form ver.1, October 23, 2014
NORTH CAROLINA BROWNFIELDS PROGRAM
ENVIRONMENTAL MANAGEMENT PLAN
This form is to be used to prepare an Environmental Management Plan (EMP)for projects in the
North Carolina Brownfields Program at the direction of a project manager for the program.
Prospective Developers and/or their consultants must complete and submit this form and all
pertinent attachments to their project manager prior to any site earthmoving or other
development related activities. For the resultant EMP to be valid for use,it must be completed,
reviewed by the program, and signed by all signers at the bottom.Consult your project
manager if you have questions.
GENERAL INFORMATION
Date:11/11/2016
Brownfields Assigned Project Name:Atherton Mill Property
Brownfields Project Number:10047-06-060
Brownfields Property Address:2000, 2100, 2130 and 2140 South Boulevard, Charlotte, North Carolina
Brownfields Property Area (acres):9.78
Is Brownfields Property Subject to RCRA Permit?☐Yes ☒No
If yes enter Permit No.:Click here to enter text.
Is Brownfields Property Subject to a Solid Waste Permit?☐Yes ☒No
If yes, enter Permit No.:Click here to enter text.
COMMUNICATIONS
Prospective Developer (PD):Atherton Mill (E&A),LLC
Phone Numbers:Office:803.779.4420…..Mobile:Click here to enter text.
Email:Click here to enter text.
Primary PD Contact:Lyle Darnall
Phone Numbers: Office:803.779.4420 Mobile:[e-mail]
Email:
Environmental Consultant:
Phone Numbers: Office:704-357-8600…..Mobile:Click here to enter text.
Email:[e-mail]
Brownfields Program Project Manager:Carolyn Minnich
Office:704-661-0330
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EMP Form ver.1, October 23, 2014
Email:[e-mail]
Other DENR Program Contacts (if applicable, i.e., UST Section, Inactive Hazardous Site Branch,
Hazardous Waste, Solid Waste):Hazardous Waste Program –Harold “Bud” McCarty [phone] ;
[e-mail]
NOTIFICATIONS TO THE BROWNFIELDS PROGRAM
Advance Notification Times to Brownfields Project Manager:Check each box to accept minimum
notice periods (in calendar days)for each type of onsite task:
On-site assessment or remedial activities:Within 10 days ☒
Construction or grading start:Within 10 days ☒
Discovery of stained soil, odors,USTs,buried drums or waste, landfill,or other signs of previously
unknown contamination:Within 48 hours ☒
Implementation of emergency actions (e.g. dewatering, flood, or soil erosion control
measures in area of contamination, venting of explosive environments):
Within 48 hours ☒
Installation of mitigation systems:Within 10 days ☒
Other notifications as required by local, state or federal agencies to implement
redevelopment activities:(as applicable):Within 30 days ☒
REDEVELOPMENT PLANS
1)Type of Redevelopment (check all that apply):
☒Residential ☐Recreational ☐Institutional ☒Commercial ☒Office ☒Retail ☐Industrial
☒Other specify:City of Charlotte bike/pedestrian path
2)Summary of Redevelopment Plans (attach conceptual or detailed plans as available):
a)Do plans include demolition of structure(s)?:☒Yes ☐No ☐Unknown
b)Do plans include removal of building foundation slab(s)or pavement:
☒Yes ☐No ☐Unknown
c)Provide brief summary of redevelopment plans, including demolition,removal of building
slabs/pavement and other structures:Current redevelopment plans include remodeling
Building 1 (2000 South Boulevard)to add commercial, office,and retail space.Areas of
exisiting concrete slab and wood block flooring will be removed and vapor intrusion
mitigation systems are being installed inside Building 1.Plans for redevelopment of the
remaining southern buildings/portion of the property have not been finalized.
3)Which category of risk-based screening level is used or is anticipated to be specified in the
Brownfields Agreement?
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EMP Form ver.1, October 23, 2014
☒Residential
The Building 1 indoor air risk evaluation was performed using Industrial/Commercial risk parameters.
Residential use is not contemplated within Building 1. Residential risk-based screening levels will be
used for the remainder of the property.
☒Non-residential or Industrial/Commercial
Note: If children frequent the property, residential screening levels shall be cited in the Brownfields
Agreement for comparison purposes.
4)Schedule for Redevelopment (attach construction schedule):
a)Phase I start date and anticipated duration (specify activities during each phase):
2016
Building 1 redevelopment/mitigation to be complete in 2016. Redevelopment of the remainder of
the property is anticipated to commence in 2017.
b)If applicable,Phase 2 start date and anticipated duration (specify activities during each
phase):Click here to enter a date.
See above.
c)Additional phases planned?If yes, specify activities if known:
☐Yes ☐No ☐Not in the foreseeable future ☒Decision pending
d)Provide the planned date of occupancy for new buildings:TBD
CONTAMINATED MEDIA
Contaminated Media (attach tabulated data summaries for each impacted media and figure(s) with
sample locations):
Part 1.Soil:☒Yes ☐No ☐Suspected
Part 2.Groundwater:☒Yes ☐No ☐Suspected
Part 3.Surface Water:☐Yes ☒No ☐Suspected
Part 4. Sediment:☐Yes ☒No ☐Suspected
Part 5.Soil Vapor:☐Yes ☐No ☒Suspected
Part 6.Sub-Slab Soil Vapor:☒Yes ☐No ☐Suspected
Part 7.Indoor Air:☒Yes ☐No ☐Suspected
PART 1.SOIL –Please fill out the information below, using detailed site plans,if available, or estimate
using known areas of contaminated soil and a conceptual redevelopment plan.Provide a figure
overlaying new construction onto figure showing contaminated soil and groundwater locations.
1)Known or suspected contaminants in soil (list specific compounds):Carbon Tetrachloride, 1,1-
DCA, 1,1-DCE, PCE, 1,1,1-TCA, 1,1,2-TCA, TCE, Xylenes
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EMP Form ver.1, October 23, 2014
2)Depth of known or suspected contaminants (feet):Ranging from 0 –15 feet below ground
surface in the area denoted as “Soil Restriction Area.”
3)Area of soil disturbed by redevelopment (square feet):TBD. Additonal information will be
submitted to DEQ once available.
4)Depths of soil to be excavated (feet):TBD. Additonal information will be submitted to DEQ once
available.
5)Estimated volume of soil (cubic yards)to be excavated (attach grading plan):TBD. Additonal
information will be submitted to DEQ once available.
6)Estimated volume of excavated soil (cubic yards)anticipated to be impacted by contaminants:
Based on historical soil sampling data,the locations of soil with known contamination is shown in
Figure 1.The volume of impacted soil is unknown.
7)Estimated volume of contaminated soil expected to be disposed of offsite, if applicable:Not
applicable at this time.
IMPORTED FILL SOIL
1)Will fill soil be imported to the site?☐Yes ☐No ☒Unknown
2)If yes, what is the estimated volume of fill soil to be imported?TBD based on final grading plan
3)If yes, what is the depth of fill soil to be used at the property?TBD based on final grading plan
If a range of depths, please list the range.
4)PRIOR TO ITS PLACEMENT AT THE BROWNFIELDS PROPERTY,provide plan to analyze fill soil to
demonstrate that it meets acceptable standards and can be considered clean for use at the
Brownfields property (Check all that apply):
☒Volatile organic compounds (VOCs) by EPA Method 8260
☒Semi-volatile organic compounds (SVOCs) by EPA Method 8270
☒Metals RCRA List (8) (arsenic, barium, cadmium, chromium (speciated), mercury, lead,
selenium and silver)
☐Metals –Hazardous Substance List -14 (antimony, arsenic, beryllium, cadmium, chromium
(speciated according to IHSB protocol), copper, lead, manganese, mercury, nickel, selenium, silver,
thallium, and zinc)
☐Metals –EPA Priority Pollutant List –13 (arsenic, beryllium, cadmium, chromium (speciated
according to IHSB protocol), copper, mercury, nickel, lead, antimony, selenium,silver, thallium, and
zinc)
☐Other Constituents & Analytical Method:Click here to enter text.
☒Known borrow material (DESCRIBE SOURCE AND ATTACH SAMPLING PROFILE):If soil is
obtained from a known permitted quarry, then one soil sample will be collected from the borrow
source prior to the soil being transported to the site. If fill soil is obtained from an off-siteproperty that is not a known permitted quarry, a sampling plan will be developed and submitted
for DEQ review. DEQ approval of the sampling plan and analytical results is required prior to
bringing soil on site. The specific sampling rate will be outline in the above workplan, howevergenerally if the proposed borrow source has not been previous developed (i.e. virgin land) soil
samples at a rate of one per 500-1000 cubic yards can be used as an estimate. If the borrow
source property has been previously developed, it should be estimated that soil samples will becollected at a rate of approximately one per 400 cubic yards. The borrow soil samples will be
analyzed for VOCs, SVOCs, HSL Metals plus hexavalent chromium. Soil will be considered
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EMP Form ver.1, October 23, 2014
suitable for use at the site if it does not contain compound concentrations above DEQ IHSBResidentialPSRGs or typical background levels for metals from samples on the Brownfields
Property or immediate surrounding area.
MANAGING ONSITE SOIL
1)If soil in known or suspected areas of contamination is anticipated to be excavated from the
Brownfield Property, relocated on the Brownfields Property,or otherwise disturbed during site
grading or other redevelopment activities,please provide a grading plan that clearly illustrates
areas of cut and fill (approximate areas & volumes are acceptable,if only preliminary data
available).
2)HAZARDOUS WASTE DETERMINATION –Does the soil contain a LISTED WASTE as defined in the
North Carolina Hazardous Waste Section under 40 CFR Part 261.31-261.35?☐Yes ☒No
If yes,explain why below, including the level of knowledge regarding processes generating the
waste( include pertinent analytical results as needed).Click here to enter text.
If yes, do the soils exceed the “Contained-Out”levels in Attachment 1 of the North Carolina
Contained-In Policy?☐Yes ☐No
NOTE: IF SOIL MEETS THE DEFINITION OF A LISTED HAZARDOUS WASTE AND EXCEEDS THE
CONTAINED-OUT LEVELS IN ATTACHMENT 1 TO THE NORTH CAROLINA CONTAINED-IN POLICY THE
SOIL MAY NOT BE RE-USED ON SITE AND MUST BE DISPOSED OF IN ACCORDANCE WITH DENR
HAZARDOUS WASTE SECTION RULES AND REGULATIONS.
3)HAZARDOUS WASTE DETERMINATION –Does the soil contain a CHARACTERISTIC WASTE?:
☐Yes ☒No
If yes, mark reason(s)why below (and include pertinent analytical results).
☐Ignitability
☐Corrosivity
☐Reactivity
☐Toxicity
☐TCLP results
☐Rule of 20 results (20 times total analytical results for an individual hazardous
constituent on TCLP list cannot, by test method,exceed regulatory TCLP standard)
If no, explain rationale:Analytical results for soils which will be disturbed did not indicate
concentrations of VOCs above laboratory reporting limits.
NOTE: IF SOIL MEETS THE DEFINITION OF A CHARACTERISTIC HAZARDOUS WASTE, THE SOIL MAY NOT
BE RE-USED ON SITE AND MUST BE DISPOSED OF IN ACCORDANCE WITH DENR HAZARDOUS WASTE
SECTION RULES AND REGULATIONS.
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EMP Form ver.1, October 23, 2014
4)Screening criteria by which soil disposition decisions will be made (e.g., left in place, capped in
place with low permeability barrier, removed to onsite location and capped, removed offsite):
☒Preliminary Health-Based Residential SRGs 4/1/2016
☐Preliminary Health-Based Industrial/Commercial SRGs Click here to enter a date.
☐Site-specific risk-based cleanup level,or acceptable concentrations determined via
calculated cumulative risk. Enter details of methods used for determination/explanation:
5)Check the following action(s)to be taken during excavation and management of said soils:
☒Manage fugitive dust from site:
☒Yes ☐No
If yes, describe method; If no, explain rationale:Spray area with water, when necessary
☒Field Screening:
☒Yes ☐No
If yes, describe method; If no, explain rationale:See attached Managing On-site Soil document
for field screening procedures.Contractor will take into account wind speed/direction and soil moisture
during grading and stockpiling activities.
Soil Sample Collection:
☒Yes ☐No
If yes, describe method (e.g., in-situ grab, composite, stockpile, etc.); If no, explain rationale:
See attached Managing On-site Soil document for soil sample collection procedures. The fieldscreening and/or laboratory analytical results will be tabulated and presented graphically as a
contaminated soil location plan for consideration prior to and during soil disturbing/earthwork
activities.
☒Stockpile impacted soil in accordance with NCDENR IHSB protocol in the current version of
the “Guidelines for Assessment and Cleanup”, and providing erosion control,prohibiting
contact between surface water/precipitation and contaminated soil, and preventing
contaminated runoff. Explain any variances:
None anticipated.
☒Analyze potentially impacted soil for the following chemical analytes:
☒Volatile organic compounds (VOCs) by EPA Method 8260
☒Semi-volatile organic compounds (SVOCs) by EPA Method 8270
☒Metals RCRA List (8) (arsenic, barium, cadmium, chromium (speciated), mercury,
lead, selenium and silver)
☐Metals –Hazardous Substance List -14 (antimony, arsenic, beryllium, cadmium,
chromium (speciated according to IHSB protocol), copper, lead, manganese, mercury, nickel,
selenium, silver, thallium, and zinc)
☐Metals –EPA Priority Pollutant List –13 (arsenic, beryllium, cadmium, chromium
(speciated according to IHSB protocol), copper, mercury, nickel, lead, antimony, selenium, silver,
thallium, and zinc)
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EMP Form ver.1, October 23, 2014
☐Other Constituent(s)& Analytical Method(s):Click here to enter text.
☒Proposed Measures to Obtain Pre-Approval for Reuse of Impacted Soil within the
Brownfields Property Boundary
☒Provide documentation of analytical report(s)to Brownfields Project Manager
☒Provide documentation of final location, thickness and depth of relocated soil on
site map to Brownfields Project Manager once known
☐Use geotextile to mark depth of fill material (provide description of material)
☒Manage soil under impervious cap ☒or clean fill ☒
Describe cap or fill:potential asphalt pavement in vehicle parking areas.(provide
location diagram)
☐Confer with NC BF Project Manager if Brownfield Plat must be revised (or re-
recorded if actions are Post-Recordation).
☒Other:If soil contains concentrations of constituents below the residential
screening levels, the soil will be reused onsite within the Soil Restriction Area.
☐Not checked.Final grade soil in the soil restriction zone will be covered
with permanent hardscape or buildings or in areas where human exposure is unlikely.
Final grade sampling of exposed soil (i.e., soil that will not be under buildings or permanent
hardscape):[if not checked provide rationale for not needing]
Provide diagram of soil sampling locations, number of samples, and denote Chemical
Analytical Program with check boxes below (Check all that apply):
☐Volatile organic compounds (VOCs) by EPA Method 8260
☐Semi-volatile organic compounds (SVOCs) by EPA Method 8270
☐Metals RCRA List (8) (arsenic, barium, cadmium, chromium (speciated), mercury,
lead, selenium and silver)
☐Metals –Hazardous Substance List -14 (antimony, arsenic, beryllium, cadmium,
chromium (speciated according to IHSB protocol), copper, lead,manganese, mercury, nickel,
selenium, silver, thallium, and zinc)
☐Metals –EPA Priority Pollutant List –13 (arsenic, beryllium, cadmium, chromium
(speciated according to IHSB protocol), copper, mercury, nickel, lead, antimony, selenium, silver,
thallium, and zinc)
☐Pesticides
☐PCBs
☐Other Constituents & Analytical Method:Click here to enter text.
OFFSITE TRANSPORT & DISPOSITION OF EXCAVATED SOIL
NOTE:Unless soil will be transported offsite for disposal in a permitted facility under applicable
regulations, no contaminated or potentially contaminated soil may leave the site without approval
from the brownfields program. Failure to obtain approval may violate a brownfields agreement,
endangering liability protections and making said action subject to enforcement.Justifications
provided below must be approved by the Program in writing prior to completing transport activities.
☒Transport and dispose of impacted soil offsite (documentation of final disposition must be sent to
Brownfields Project Manager)
☒Landfill –analytical program determined by landfill
☐Landfarm or other treatment facility Click here to enter text.
☐Use as Beneficial Fill Offsite –provide justification:Click here to enter text.
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EMP Form ver.1, October 23, 2014
☐Use as Beneficial Fill at another Suitable Brownfields Site –(Note: a determination that a
site is a “Suitable Brownfields”site will require, at a minimum, that similar concentrations of the same
or similar contaminants already exist at both sites, use of impacted soil as beneficial soil will not
increase the potential for risk to human health and the environment at that site, and that notarized
documentation of the acceptance of such soil from the property owner of the receiving site is
provided to Brownfields. Provide justification:Click here to enter text.
MANAGEMENT OF UTILITY TRENCHES
☐Install liner between native impacted soils and base of utility trench before filling with clean fill
(Preferred)
☒Last out, first in principle for impacted soils (if soil can safely be reused onsite and is not a
hazardous waste), i.e., impacted soils are placed back at approximately the depths they were
removed from such that impacted soil is not placed at a greater depth than the original depth from
which it was excavated.
☒Evaluate whether necessary to install barriers in conduits to prevent soil vapor transport,and/or
degradation of conduit materials due to direct impact with contaminants?Result:Yes □ No □
If no, include rationale here.Click here to enter text.
If yes, provide specifications on barrier materials
Other comments regarding managing impacted soil in utility trenches:Subsurface utility activities
including excavation of utility trenches within the “Soil Restriction Zone”depicted on Figure 1 will be
conducted in accordance with this EMP.During utility line installation, an environmental professional
will provide construction monitoring and oversight (stockpiling soil, backfilling trench, monitoring
atmosphere, equipment decontamination procedures, etc.). Subsurface utility trench activities in areas
outside of the “Soil Restriction Zone”will be conducted in accordance to the attached Environmental
Contingency Plan for Subsurface Activities.
PART 2.GROUNDWATER –Please fill out the information below and attach figure showing
distribution of groundwater contaminants at site
What is the depth to groundwater at the Brownfields Property?21 to 31 feet below ground surface
Is groundwater known to be contaminated by ☐onsite ☐offsite ☒both ☐or unknown
sources?Describe source(s):Previous source areas identified at the property are located along the
northwestern property boundary.Off-site sources are unknown.
What is the direction of groundwater flow at the Brownfields Property?Groundwater flows from
south to north at the property.
Will groundwater likely be encountered during planned redevelopment activities?☐Yes ☒No
If yes, describe these activities:It is unknown if groundwater will be encountered during
redevelopment activities.The extent to which groundwater will be encountered will depend on the
foundation structures needed for the site.
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EMP Form ver.1, October 23, 2014
In the event that contaminated groundwater is encountered during redevelopment activities (even if
no is checked above), list activities for contingent management of groundwater (e.g., dewatering of
groundwater from excavations or foundations,containerizing, offsite disposal,discharge to sanitary
sewer,or sampling procedures):Groundwater is not likely to be encountered during future
redevelopment activities.However, if groundwater is encountered during redevelopment activites,
such as for construction of deep building foundations requiring dewatering, groundwater will be
removed from excavations and containerized and/or treated for disposal.The groundwater will be
disposed offsite at a permitted facility.The existing analysis of groundwater is likely sufficient for
disposal characterization; however, additional analysis might be required for acceptance by a disposal
facility.
PART 3.SURFACE WATER –Please fill out the information below.
Attach a map showing the location of surface water at the Brownfields Property.
Is surface water at the property known to be contaminated:☐Yes ☒No
Will workers or the public be in contact with surface water during planned redevelopment activities?
☐Yes ☒No
In the event that contaminated surface water is encountered during redevelopment activities,or
clean surface water enters open excavations,list activities for management of such events (e.g.
flooding, contaminated surface water run-off, stormwater impacts):If contaminated surface water is
encountered during redevelopment activities, or clean surface water enters open excavations
containing potentially contaminated soil, the surface water will be containerized.Following
characterization, the surface water will be properly disposed.
PART 4. SEDIMENT –Please fill out the information below.
Is sediment at the property known to be contaminated:☐Yes ☒No
Will workers or the public be in contact with sediment during planned redevelopment activities?
☐Yes ☒No
If yes, attach a map showing location of known contaminated sediment at the property.
In the event that contaminated sediment is encountered during redevelopment activities,list
activities for management of such events (stream bed disturbance):Click here to enter text.
PART 5.SOIL VAPOR –Please fill out the information below.
Do concentrations of volatile organic compounds at the Brownfields property exceed the following
vapor intrusion screening levels in the following media:
IHSB Residential Screening Levels:
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EMP Form ver.1, October 23, 2014
Soil Vapor:☒Yes for some areas of the property. Refer to ‘Vapor Intrusion
Requirement Zone’on plat Yes ☐No ☐Unknown
Groundwater:☒Yes ☐No ☐Unknown
IHSB Industrial/Commercial Screening Levels:
Soil Vapor:☒Yes for some areas of the property. Refer to ‘Vapor Intrusion
Requirement Zone’on plat Yes ☐No ☐Unknown
Groundwater:☒Yes ☐No ☐Unknown
Attach a map showing the location of soil vapor contaminants that exceed site screening levels.
If applicable, at what depth(s) is soil vapor known to be contaminated?Sub-slab soil vapor impact is
discussed in Part 6 below.
Will workers encounter contaminated soil vapor during planned redevelopment activities?
☐Yes ☐No ☒Unknown
In the event that contaminated soil vapor is encountered during redevelopment activities (trenches,
manways, basements or other subsurface work, list activities for management of such contact:The
soil vapor management plan for workers involved in excavation activities is to provide an
environmental awareness training (conducted by an environmental professional) to the excavation
workers. The training shall be conducted before commencement of excavation activities. If the
excavations are conducted inside a building or low ventilated areas, fans with a flexible exhaust
ductwork extending to outside the building will be placed adjacent to the excavated area and
operated during excavation activities. In addition,if an excavated area inside a building is to be left
open for more than 6 hours, the excavated area will be covered with plastic and taped to the floor to
minimize potential soil gas entry into the indoor air.
PART 6.SUB-SLAB SOIL VAPOR -please fill out the information below if existing buildings or
foundations will be retained in the redevelopment.
Are sub-slab soil vapor data available for the Brownfields Property?☒Yes ☐No ☐Unknown
If data indicate that sub-slab soil vapor concentrations exceed screening levels, attach a map showing
the location of these exceedances.
At what depth(s) is sub-slab soil vapor known to be contaminated?☒0-6 inches ☐Other, If other
describe:Click here to enter text.
Will workers encounter contaminated sub-slab soil vapor during planned redevelopment activities?
☐Yes ☐No ☒Unknown
In the event that contaminated soil vapor is encountered during redevelopment activities, list
activities for management of such contact:The soil vapor management plan for workers involved in
excavation activities within the soil vapor mitigation zone is to provide an environmental awareness
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EMP Form ver.1, October 23, 2014
training (conducted by an environmental professional) to the excavation workers. The training shall
be conducted before commencement of excavation activities. If the excavations are conducted inside
a building or low ventilated areas, fans with a flexible exhaust ductwork extending to outside the
building will be placed adjacent to the excavated area and operated during excavation activities. In
addition, if an excavated area inside a building is to be left open for more than 6 hours, the excavated
area will be covered with plastic and taped to the floor to minimize potential soil gas entry into the
indoor air.For existing and proposed vapor mitigation systems, an operation and maintenance plan
will be prepared which will address considerations for performing work which might impact the sub-
slab vapor mitigation systems/barriers.
PART 7.INDOOR AIR –Please fill out the information below .
Are indoor air data available for the Brownfields Property?☒Yes ☐No ☐Unknown
If yes, attach a map showing the location where indoor air contaminants exceed site screening levels.
If the structures where indoor air has been documented to exceed risk-based screening levels will not
be demolished as part of redevelopment activities, will workers encounter contaminated indoor air
during planned redevelopment activities?
☐Yes ☐No ☒Unknown
In the event that contaminated indoor air is encountered during redevelopment activities, list
activities for management of such contact:Redevelopment work within inside Building 1 or Building 2
that occurs within manways, basements, or other low ventilated areas indoors where there may be
potential contact contaminated indoor air will require fans with flexible exhaust ductwork extending
to the outside of the building placed adjacent to the work area.
PART 8 –Vapor Mitigation System –Please fill out the information below .
Is a vapor intrusion mitigation system proposed for this Brownfields Property?
☒Yes ☐No ☒For areas outside the “Vapor Intrusion Requirement Zone”
Unknown
If yes,provide the date the plan was submitted to the Brownfields Program.
1/15/2016
Attach the plan.
Has the vapor mitigation plan been approved by the NC Brownfields Program?
☒Yes ☐No ☐Unknown
Has the vapor mitigation plan been signed and sealed by a North Carolina professional engineer?
☒Yes ☐No
What are the components of the vapor intrusion mitigation system?
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EMP Form ver.1, October 23, 2014
☒Sub-slab depressurization system
☐Sub-membrane depressurization system
☐Block-wall depressurization system
☐Drain tile depressurization system
☒Passive mitigation methods
☒Vapor barriers
☒Perforated piping vented to exterior
☐Other method:Click here to enter text.
PART 9. CONTINGENCY FOR ENCOUNTERING UNKNOWN TANKS, DRUMS, OR OTHER WASTE
MATERIALS
Please provide a contingency plan in the event unknown tanks, drums, fuel lines, landfills,or other
waste materials are encountered during site activities.
Check the following activities that will be conducted prior to commencing earth-moving activities at
the site:
☒Review of historic maps (Sanborn Maps, facility maps)
☒Conducting geophysical surveys to evaluate the location of suspect UST, fuel lines, utility lines, etc.
☐Interviews with employees/former employees/facility managers/neighbors
Notification to State Brownfields Project Manager, UST Section, Fire Department, and/or other
officials,as necessary and appropriate, is required when new potential source(s) of contamination are
discovered. See Notification Section on Page 1 for notification requirements.
POST-REDEVELOPMENT REPORTING
In accordance with the site’s Brownfield Agreement, provide a report within the designated schedule
to the State Brownfields Project Manager.
☒Check box to acknowledge consent to provide a redevelopment summary report in compliance
with the site’s Brownfields Agreement.
LIST OF ATTACHMENTS
1.Historic Soil Restriction Plan
2.Soil Restriction Plan
3.Additional information related to Atherton Mill Environmental Management Plan;Part 1“Soil”; “Managing Onsite Soil,Field Screening” and “Soil Sample Collection”
4.Exhibit 2 –Tables of Groundwater-Vapor Intrusion, Soil, Sub-soil Vapor and Indoor Air
Data
5.Vapor Restriction Plan showing 2015 Groundwater Data
6.Figure showing Former Maximum Concentration Sampling Locations
7.Summary of Sub-slab Soil-gas Analytical Results
8.Figure showing Sub-slab Vapor Sampling Locations
9.Summary of Indoor Air Analytical Results
10.Figure showing Indoor Air Testing Locations
11.Final Atherton Mill Vapor Mitigation Plan
12.Environmental Contingency Plan for Subsurface Activities
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LEGEND
12 Former Soil Sample Location
Geotechnical Boring
Geotechnical Boring and Temporary Monitoring Well
Proposed Soil Restriction Zone
1PROJECT NO:FIGURE NO:6228-12-0051
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0 200100 Feet
Notes:
Soil Concentrations shown in µg/kgBold values exceeded their respective IHSB Residential PSRGsShaded values exceed their respective IHSB Industrial PSRGs
IHSB PSRGs = NCDEQ Inactive Hazardous Sites Branch Preliminary Soil Remediation Goals, dated April 2016SWMU = Solid waste management units established by NCDEQ/EPA
WMU = Waste management unit established by NCDEQ/EPA
SWMU II SWMU I
WMU I
Historical Soil Analytical Summary
SOIL RESTRICTION PLAN
ATHERTON MILL
CHARLOTTE, NORTH CAROLINA
16,200
1,260
Additional information related to Atherton Mill Environmental Management
Plan;Part 1 “Soil”; “Managing Onsite Soil,Field Screening” and “Soil
Sample Collection”
I.Work Outside the Soil Restriction Area
Subsurface activities conducted in areas outside of the “Soil Restriction Zone”as depicted
on Figure 1 will be conducted in accordance with the Environmental Contingency Plan
(ECP)for Subsurface Activities, which is attached as an exhibit to the EMP.The ECP
addresses actions to be taken in the event that potential environmental conditions are
encountered at the Site during subsurface activities.
II. Work Inside the Soil Restriction Area
Subsurface activities within the proposed “Soil Restriction Area” as depicted in Figure 1
shall not be conducted except as described herein.
A. Pre-Construction Evaluation
Prior to the commencement of subsurface excavation or other activity that disturbs the
ground surface in the “Soil Restriction Area,”an evaluation of historic soil sampling
results and/or pre-construction soil sampling will be performed.This evaluation will
consist of field screening and, depending on the results of the field screening,
analytical soil sampling. The procedure for conducting this evaluation is outlined
below:
1.Field Screening for Mass Excavations
Before commencement of mass excavations within the “Soil Restriction Zone”,
the proposed disturbed area will be divided into 50-foot by 50-foot grids,which
will contain one soil screening location (a “node”) at or near the center of each
grid.Retrieved soil from soil borings at each node will be screened at one-foot
intervals (either headspace in bags of soil, or from continuous soil core in direct
push sampling sleeves)down to the proposed depth of the excavation for
volatile compounds using a photoionization detector (PID).For grids where
PID readings exceed 10 ppm, soil sampling will occur as described in section 3
below. For grids where PID readings do not exceed 10 ppm,work may
proceed in that grid pursuant to the ECP.
2.Field Screening for Underground Utility Activities
Before commencement of underground utility activities within the “Soil
Restriction Area”,the area of the proposed trench to be disturbed will be
divided into 50-linear foot sections along the utility alignment, which will contain
one soil screening location (node) at or near the center of each section.
Retrieved soil from soil borings at each node will be screened at one-foot
intervals (either headspace in bags of soil, or from continuous soil core in direct
push sampling sleeves) down to the proposed depth of the excavation for
volatile compounds using a photoionization detector (PID).For sections where
PID readings exceed 10 ppm, soil sampling will occur as described in section 3
below. For sections where PID readings do not exceed 10 ppm,work may
proceed in that section pursuant to the ECP.
3.Soil Sample Collection
Collection of soil samples for laboratory analysis will occur at each node where
the field screening results (see sections 1 and 2 above)indicated PID readings
which exceed 10 ppm.Soil samples will be collected at every five-foot interval
where the PID readings exceed 10 ppm (i.e. one soil sample from 0 to 5 feet
deep, one soil sample from 5 to 10 feet deep, etc., assuming PID readings
exceeded 10 ppm at each interval).Soil samples will be collected using a
stainless steel hand auger or mechanical drilling equipment depending on the
locations. If auger refusal is encountered, up to three off-set borings will be
attempted within ten feet of the original sampling location.
If the laboratory analysis does not identify any constituents at concentrations
exceeding the Preliminary Health-Based Residential SRGs (April 1, 2016),
then subsurface work in that grid/section will be conducted pursuant to the
ECP. If the laboratory analysis identifies impacted soil above the applicable
SRGs, such impacted soil will be managed as set forth below.
B.Soil Evaluation During Construction
For subsurface work conducted in grids/sections where the soil sampling identified
constituents above the applicable SRGs, an environmental professional will provide
construction monitoring and oversight for all subsurface work within such grid/section
(including screening,stockpiling soil, backfilling, monitoring atmosphere, equipment
decontamination procedures, etc.).Excavated soil and the sidewalls of exposed
pits/trenches will be screened for volatile compounds using a PID whenever potential
soil contamination is observed (such as staining, odors, or other indicators of potential
impact) within the discretion of the environmental professional.
If PID readings are below 10 ppm, work may proceed. When PID readings exceed 10
ppm, the environmental professional will determine if it is safe for work to continue and
direct the Contractor and/or Subcontractor to segregate the potentially-contaminated
soil into stockpiles. The stockpiles will be managed as set forth in Section C below.
Field screening will continue to be taken until PID readings are below 10 ppm.
C.Sampling & Management of Stockpiled Soil
Soil with elevated field screening readings or which exceeds the SRGs based on soil
sampling results will be segregated and divided into approximate 100 cubic yard
stockpiles for sampling.
Five discrete “grab”soil samples will be randomly collected from each stockpile. The
samples will be collected at different depths within the stockpile using a
decontaminated stainless steel hand auger. The discrete grab samples will be
composited in a decontaminated stainless steel bowl and the composited sample will
be placed in the sample container(s). For VOC analysis, the five discrete grab
samples will be scanned with a PID and the sample area with the highest PID reading
will be selected for submittal for VOC analysis (a composite sample will not be used
for VOC analysis).
D. Reuse or Disposal of Impacted Soil
Following analytical testing as described above, soil which does not exceed the
applicable residential SRGs may be reused onsite. Soil which is found to impacted
may be reused onsite provided it is managed with an impervious cap or clean fill and
DEQ is notified of such onsite management as required by the EMP.Soil which is
found to be impacted may also be transferred to a permitted disposal facility in
accordance with applicable regulations.
No soil will be taken offsite to be used for unrestricted use without DEQ approval.
III.General Soil Sample Collection Procedures
The sampling equipment will be decontaminated prior to sampling and between samples
with industrial liquid soap and potable water.Individual, new, non-latex gloves will be worn
by personnel handling in-hole equipment and sampling materials. Soil samples collected
and a trip blank will be placed in an ice-chilled cooler and shipped overnight with
appropriate chain-of-custody records to a North Carolina accredited laboratory for analysis
of VOCs by EPA Method 8260, SVOCs by EPA Method 8270 and RCRA 8 Metals.
IV.Data Analysis
The field screening and/or laboratory analytical results will be tabulated and presented
graphically as a contaminated soil location plan that will depict necessary handling
requirements for soil within each 50-foot by 50-foot grid area or 50-foot linear section
along a utility trench. This data will be presented to the Contractor and/or Subcontractor
for consideration prior to and during soil disturbing/earthwork activities.
Exhibit 2
The most recent environmental sampling at the Property reported in the
Environmental Reports occurred in April 2013.The following tables set forth, for
contaminants present at the Property above unrestricted use standards, the maximum
concentration found at each sample location and the applicable standard or screening
limit:
Groundwater contaminants in micrograms per liter (the equivalent of parts per billion),
the standards for which are contained in Title 15A of the North Carolina Administrative
Code, Subchapter 2L, Rule .0202;April 1, 2013 version:
Groundwater
Contaminant
Sample
Location
Date of Max.
Concentration
Sampling
Maximum
Concentration
above Std.
(g/L)
Most Recent
Concentration
(g/L)
Standard
(g/L)
Benzene MW-9 Unknown Unknown 1.5
1/03/01
1
1,1-
Dichloroethene
MW-5 Unknown Unknown 2,200
1/03/01
350
1,1-
Dichloroethene
MW-9 Unknown Unknown 1,400
1/03/01
350
1,1-
Dichloroethene
MW-14 5/22/01 35,000 1,800
06/02/04
350
1,1-
Dichloroethene
MW-14A 5/22/01 37,000 26,000
06/02/04
350
1,1-
Dichloroethane
MW-14 5/22/01 480 140
06/02/04
6
1,1-
Dichloroethane
MW-14A 6/18/01 1,800 840
06/02/04
6
1,1-
Dichloroethane
MW-14B 5/22/01 72 7.3
06/02/04
6
cis-1,2-
Dichloroethene
MW-5 Unknown Unknown 250
1/03/01
70
cis-1,2-
Dichloroethene
MW-9 Unknown Unknown 190
1/03/01
70
cis-1,2-
Dichloroethene
MW-14 5/22/01 2,200 570
06/02/04
70
cis-1,2-
Dichloroethene
MW-14A 6/18/01 2,200 1,200
06/02/04
70
cis-1,2-
Dichloroethene
MW-14B 5/22/01 170 11
06/02/04
70
1,2-
Dichloroethane
MW-14A 6/18/01 150 < 500 DL
06/02/04
0.4
1,1,1-
Trichloroethane
MW-5 Unknown Unknown 500
1/03/01
200
Groundwater
Contaminant
Sample
Location
Date of Max.
Concentration
Sampling
Maximum
Concentration
above Std.
(g/L)
Most Recent
Concentration
(g/L)
Standard
(g/L)
1,1,1-
Trichloroethane
MW-9 Unknown Unknown 310
1/03/01
200
1,1,1-
Trichloroethane
MW-14 5/22/01 62,000 7,300
06/02/04
200
1,1,1-
Trichloroethane
MW-14A 5/22/01 22,000 16,000
06/02/04
200
1,1,1-
Trichloroethane
MW-14B 5/22/01 71,000 760
06/02/04
200
Trichloroethene MW-2A Unknown Unknown 170
1/03/01
3
Trichloroethene MW-5 Unknown Unknown 10,000
1/03/01
3
Trichloroethene MW-9 Unknown Unknown 7,700
1/03/01
3
Trichloroethene MW-10 Unknown Unknown 21
1/03/01
3
Trichloroethene MW-10A Unknown Unknown 19
1/03/01
3
Trichloroethene MW-12 Unknown Unknown 2,100
1/03/01
3
Trichloroethene MW-14 5/22/01 300,000 43,000
06/02/04
3
Trichloroethene MW-14A 5/22/01 260,000 250,000
06/02/04
3
Trichloroethene MW-14B 5/22/01 200,000 2,500
06/02/04
3
Tetra-
chloroethene
MW-2A Unknown Unknown 5.4
1/03/01
0.7
Tetra-
chloroethene
MW-5 Unknown Unknown 430
1/03/01
0.7
Tetra-
chloroethene
MW-9 Unknown Unknown 430
1/03/01
0.7
Tetra-
chloroethene
MW-10 Unknown Unknown 8.0
1/03/01
0.7
Tetra-
chloroethene
MW-10A Unknown Unknown 55
1/03/01
0.7
Tetra-
chloroethene
MW-12 Unknown Unknown 63
1/03/01
0.7
Tetra-
chloroethene
MW-14 5/22/01 1,200 840
06/02/04
0.7
Tetra-MW-14A 5/22/01 16,000 10,000 0.7
Groundwater
Contaminant
Sample
Location
Date of Max.
Concentration
Sampling
Maximum
Concentration
above Std.
(g/L)
Most Recent
Concentration
(g/L)
Standard
(g/L)
chloroethene 06/02/04
Tetra-
chloroethene
MW-14B 5/22/01 440 190
06/02/04
0.7
Toluene MW-14 5/22/01 130 <100 DL
06/02/04
600
Toluene MW-14A 5/22/01 &
6/18/01
1,200 < 500 DL
06/02/04
600
Vinyl chloride MW-14A 11/01/01 38 <500 DL
06/02/04
0.03
Vinyl chloride MW-15 1/03/01 1.2 Not Available 0.03
Xylenes MW-14A 5/22/01 820 < 1000 DL
06/02/04
500
DL = Detection limit.
GROUNDWATER-VAPOR INTRUSION
Groundwater contaminants in micrograms per liter (the equivalent of parts per
billion), the vapor intrusion screening limits for which are derived from the Residential
Vapor Intrusion Screening Levels of the Inactive Hazardous Sites Branch of DENR’s
Superfund Section (January 2014 version1)
Groundwater
Contaminant
Sample
Location
Date of
Sampling
Maximum
Concentration
Exceeding
Screening
Limit (g/L)
Residential
Screening
Limit2
(g/L)
Non-
Residential
Screening
Limit3
(g/L)
1,1-Dichloroethylene MW-5 1/03/01 2200 39.1 164
1,1-Dichloroethylene MW-9 1/03/01 1400 39.1 164
1,1-Dichloroethylene MW-14 06/02/04 1800 39.1 164
1,1-Dichloroethylene MW-14A 06/02/04 26000 39.1 164
1,1-Dichloroethane MW-14 06/02/04 140 66.2 334
1,1-Dichloroethane MW-14A 06/02/04 840 66.2 334
cis-1,2-Dichloroethene MW-5 1/03/01 250 754 3154
cis-1,2-Dichloroethene MW-9 1/03/01 190 754 3154
cis-1,2-Dichloroethene MW-14 06/02/04 570 754 3154
cis-1,2-Dichloroethene MW-14A 06/02/04 1200 754 3154
1,1,1-Trichloroethane MW-14 06/02/04 7300 1480 6230
1,1,1-Trichloroethane MW-14A 06/02/04 16000 1480 6230
1,1,1-Trichloroethane MW-14B 06/02/04 760 1480 6230
Trichloroethylene MW-2A 1/03/01 170 1.04 4.35
Trichloroethylene MW-5 1/03/01 10000 1.04 4.35
Trichloroethylene MW-9 1/03/01 7700 1.04 4.35
Trichloroethylene MW-10 1/03/01 21 1.04 4.35
Trichloroethylene MW-10A 1/03/01 19 1.04 4.35
Trichloroethylene MW-12 1/03/01 2100 1.04 4.35
Trichloroethylene MW-14 06/02/04 43000 1.04 4.35
Trichloroethylene MW-14A 06/02/04 250000 1.04 4.35
Trichloroethylene MW-14B 06/02/04 2500 1.04 4.35
Tetrachloroethylene MW-5 1/03/01 430 11.5 48.4
Tetrachloroethylene MW-9 1/03/01 430 11.5 48.4
Tetrachloroethylene MW-10A 1/03/01 55 11.5 48.4
Tetrachloroethylene MW-12 1/03/01 63 11.5 48.4
Tetrachloroethylene MW-14 06/02/04 840 11.5 48.4
Tetrachloroethylene MW-14A 06/02/04 10000 11.5 48.4
Tetrachloroethylene MW-14B 06/02/04 190 11.5 48.4
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64e48cdcafb7&groupId=38361
3.Screening limits displayed for non-carcinogens are for a hazard quotient equal to 0.2. Screening levels
displayed for carcinogens are for a 1.0E-5 lifetime incremental cancer risk.
4.No standard available for cis-1,2-dichloroethen, the standard for trans-1,2-Dichloroethylene was used.
SOIL
Soil contaminants in milligrams per kilogram (the equivalent of parts per million),
the screening limits for which are derived from the Preliminary Residential Health-Based Soil Remediation Goals of the Inactive Hazardous Sites Branch of DENR’s
Superfund Section (January 2014 version1):
Soil
Contaminant
Sample
Location
Depth in
feet
Date of
Max.
Concentrati
on
Sampling
Maximum
Concentratio
n above Std.
(mg/kg)
Residential
Screening
Limit2
(mg/kg)
Non-
Residential
Screening
Limit3
(mg/kg)
Carbon tetrachloride SWMU.
II (excavation
area–south)
*11/99 0.56 0.61 3.0
Tetrachloroethylene SWMU II
(near storm
water outfall
in drainage
ditch area)
SB-20
20 ft.
below
grade
1/00 380 17 82
1,1,1-
Trichloroethane
SWMU II
(excavation
area–center)
*11/99 6,500 640 640
Trichloroethylene SWMU II
(excavation
area-center)
*11/99 830 0.88 4.0
1,1,2-
Trichloroethane
SWMU II
(near storm
water outfall
in drainage
ditch area)
SB-7
7 ft.
below
grade
1/00 16 0.32 1.4
Xylenes SWMU II
(near storm
water outfall
in drainage
ditch area)
SB-7
7 ft.
below
grade
1/00 170 130 260
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2.Screening limits displayed for non-carcinogens are for a hazard quotient equal to 0.2. Screening limits
displayed for carcinogens are for a 1.0E-6 lifetime incremental cancer risk.
3.*depth was stated as “bottom of the excavation”
SUB-SOIL VAPOR
Soil gas contaminants in micrograms per cubic meter, the screening limits for
which are derived from Residential Vapor Intrusion Screening Levels of the Inactive
Hazardous Sites Branch of DENR’s Superfund Section (January 2014 version1):
Soil Gas Contaminant Sample
Location
Date of
Sampling
Maximum
Concentration
Exceeding
Screening
Limit (g/m3)
Residential
Screening
Limit2
(g/m3)
Non
Residential
Screening
Limit3
(g/m3)
Chloroform SG-12 10/10/2012 26.1 3.53 530
1,1 Dichloroethylene SG-12 10/10/2012 10,600 1390 17500
Naphthalene SG-1 10/10/2012 6.5 20.9 263
Naphthalene SG-5 10/10/2012 11.4 20.9 263
Naphthalene SG-8 10/10/2012 89.2 20.9 263
Naphthalene SG-9 10/10/2012 197 20.9 263
Naphthalene SG-10 10/10/2012 7.3 20.9 263
Tetrachloroethylene SG-6 10/10/2012 11,100 278 3500
Tetrachloroethylene SG-7 10/10/2012 17,100 278 3500
Tetrachloroethylene SG-12 10/10/2012 30,200 278 3500
Trichloroethylene SG-5 10/10/2012 95.1 13.9 175
Trichloroethylene SG-6 10/10/2012 26,200 13.9 175
Trichloroethylene SG-7 10/10/2012 37,400 13.9 175
Trichloroethylene SG-8 10/10/2012 39.3 13.9 175
Trichloroethylene SG-9 10/10/2012 87.9 13.9 175
Trichloroethylene SG-10 10/10/2012 3,330 13.9 175
Trichloroethylene SG-11 10/10/2012 8.9 13.9 175
Trichloroethylene SG-12 10/10/2012 94,600 13.9 175
1,2,4 Trimethylbenzene SG-3 10/10/2012 28.9 48.7.613
1,2,4 Trimethylbenzene SG-5 10/10/2012 43.2 48.7 613
1,2,4 Trimethylbenzene SG-9 10/10/2012 21.2 48.7 613
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2.Screening limits displayed for non-carcinogens are for a hazard quotient equal to 0.2. Screening limits
displayed for carcinogens are for a 1.0E-5 lifetime incremental cancer risk.
INDOOR AIR
Indoor air contaminants in micrograms per cubic meter, the screening limits for
which are derived from Vapor Intrusion Screening Levels of the Inactive Hazardous SitesBranch of DENR’s Superfund Section (January 2014 version1):
Indoor Air Contaminant Sample
Location
Date of
Sampling
Maximum
Concentration
Exceeding
Screening Limit
(g/m3)
Residential
Screening
Limit2
(g/m3)
Non-
Residential
Screening
Limit3
(g/m3)
Benzene IA-1 4/30/3012 0.90 0.312 1.57
Benzene IA-1’7/16/2013 0.58 0.312 1.57
Benzene IA-1 1/17/2017 1.4 0.312 1.57
Benzene IA-2’7/16/2013 0.81 0.312 1.57
Benzene IA-2 1/17/2014 0.66 0.312 1.57
Benzene IA-3 4/30/3012 0.91 0.312 1.57
Benzene IA-3’7/16/2013 1.1 0.312 1.57
Benzene IA-3 1/17/2017 0.85 0.312 1.57
Benzene IA-4 4/30/3012 2.3 0.312 1.57
Benzene IA-4 1/17/2014 0.96 0.312 1.57
Benzene IA-5’7/16/2013 0.83 0.312 1.57
Benzene IA-5 1/17/2014 0.62 0.312 1.57
Benzene IA-6 4/30/3012 0.65 0.312 1.57
Benzene IA-6 1/17/2014 1.3 0.312 1.57
Benzene IA-7 outdoor 4/30/2013 2.0 0.312 1.57
Benzene IA-7 outdoor 1/17/2014 0.60 0.312 1.57
Benzene IA-73 4/30/3012 2.0 0.312 1.57
Chloroform IA-1 4/30/3012 2.6 0.106 0.533
Chloroform IA-1’7/16/2013 4.4 0.106 0.533
Chloroform IA-1 1/17/2014 3.5 0.106 0.533
1,4-Dichlorobenzene IA-6 1/17/2014 3.3 0.221 1.11
1,2-Dichloroethane IS-8’7/16/2013 0.96 0.0936 0.472
Ethyl acetate IA-6 1/17/2014 37.9 14.6 61.3
Ethylbenzene IA-1 1/17/2014 12.9 0.973 4.91
Ethylbenzene IA-3’7/16/2013 1.7 0.973 4.91
Ethylbenzene IA-3 1/17/2014 4.0 0.973 4.91
Ethylbenzene IA-4’7/16/2013 3.5 0.973 4.91
Ethylbenzene IA-4 1/17/2014 1.2 0.973 4.91
Ethylbenzene IA-5’7/16/2013 6.8 0.973 4.91
Ethylbenzene IA-5 1/17/2014 1.4 0.973 4.91
Ethylbenzene IA-6’7/16/2013 3.9 0.973 4.91
Ethylbenzene IA-6 1/17/2014 3.3 0.973 4.91
n-Hexane IA-1 1/17/2014 842 146 613
Methylene Chloride IA-4 4/30/2013 162 96.1 526
Methylene Chloride IA-6 1/17/2014 102 96.1 526
Naphthalene IA-1’7/16/2013 5.8 0.0716 0.361
Naphthalene IA-1 1/17/2014 3.7 0.0716 0.361
Naphthalene IA-2 1/17/2014 2.4 0.0716 0.361
Naphthalene IA-3 4/30/3012 42.6 0.0716 0.361
Naphthalene IA-3’7/16/2013 148 0.0716 0.361
Naphthalene IA-3 1/17/2014 5.0 0.0716 0.361
Naphthalene IA-4 4/30/3012 33.2 0.0716 0.361
Naphthalene IA-4’7/16/2013 95.0 0.0716 0.361
Naphthalene IA-4 1/17/2014 7.9 0.0716 0.361
Naphthalene IA-5 4/30/3012 2.0 0.0716 0.361
Naphthalene IA-5’7/16/2013 44.0 0.0716 0.361
Naphthalene IA-5 1/17/2014 29.5 0.0716 0.361
Naphthalene IA-6’7/16/2013 5.4 0.0716 0.361
Naphthalene IA-6 1/17/2014 2.5 0.0716 0.361
Naphthalene IA-7 outdoor 7/16/2013 6.5 0.0716 0.361
Trichloroethylene IA-1’7/16/2013 61.7 0.417 1.75
Trichloroethylene IA-2’7/16/2013 4.7 0.417 1.75
Trichloroethylene IA-2 1/17/2014 7.0 0.417 1.75
Trichloroethylene IA-3’7/16/2013 24.3 0.417 1.75
Trichloroethylene IA-3 1/17/2014 1.3 0.417 1.75
Trichloroethylene IA-4 4/30/3012 2.5 0.417 1.75
Trichloroethylene IA-4’7/16/2013 45.3 0.417 1.75
Trichloroethylene IA-4 1/17/2014 6.1 0.417 1.75
Trichloroethylene IA-5 4/30/3012 2.4 0.417 1.75
Trichloroethylene IA-5’7/16/2013 1760 0.417 1.75
Trichloroethylene IA-5 1/17/2014 18.6 0.417 1.75
Trichloroethylene IA-6 7/16/2013 26.8 0.417 1.75
Trichloroethylene IA-7 outdoor 4/30/3012 6.8 0.417 1.75
Trichloroethylene IA-7 outdoor 7/16/2013 16.0 0.417 1.75
1,2,4 Trimethylbenzene IA-1 1/17/2014 2.1 1.46 6.13
1,2,4 Trimethylbenzene IA-2 1/17/2014 2.1 1.46 6.13
1,2,4 Trimethylbenzene IA-3 4/30/3012 5.9 1.46 6.13
1,2,4 Trimethylbenzene IA-3’4/30/3012 27.2 1.46 6.13
1,2,4 Trimethylbenzene IA-3 7/16/2013 11.8 1.46 6.13
1,2,4 Trimethylbenzene IA-4 4/30/3012 4.4 1.46 6.13
1,2,4 Trimethylbenzene IA-4’7/16/2013 14.6 1.46 6.13
1,2,4 Trimethylbenzene IA-4 1/17/2014 3.7 1.46 6.13
1,2,4 Trimethylbenzene IA-5 4/30/3012 2.0 1.46 6.13
1,2,4 Trimethylbenzene IA-5’7/16/2013 13.6 1.46 6.13
1,2,4 Trimethylbenzene IA-5 1/17/2014 4.3 1.46 6.13
1,2,4 Trimethylbenzene IA-6’7/16/2013 2.5 1.46 6.13
1,2,4 Trimethylbenzene IA-6 1/17/2014 3.6 1.46 6.13
1,2,4 Trimethylbenzene IA-7 outdoor 1/17/2014 1.9 1.46 6.13
m&p Xylene IA-1 1/17/2014 45.5 20.9 87.6
m&p Xylene IA-5’1/17/2014 25.7 20.9 87.6
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2.Screening limits displayed for non-carcinogens are for a hazard quotient equal to 0.2. Screening levels
displayed for carcinogens are for a 1.0E-6 lifetime incremental cancer risk.
3.IA-7 was an outdoor sample.
C-9
C-8
C-7
C-6
C-5
C-4
C-3
C-2
C-1
C-10
F:\AMEC_Projects\2015\6228-12-0051 Atherton Mill Proposal\GIS\MXDs\Project\Figure2_VaporRestrictionPlan.mxd, User: maddison.sutton; Date: 6/3/2016 3:06:26 PM, Checked by: RCF Date: 6/3/2016
LEGEND
Geotechnical BoringGeotechnical Boring and Temporary Monitoring Well Proposed "Vapor Barrier" Zone
VAPOR RESTRICTION PLANATHERTON MILLCHARLOTTE, NORTH CAROLINA
2PROJECT NO:FIGURE NO:6228-12-0051
¯
Notes:- Groundwater concentrations shown in µg/L- Groundwater samples collected on October 23, 2015- Bold values exceed NC 2L Standards/Interim Max. allowable concentration (IMAC)- Underlined values exceed Non-Residential GWSLs- Shaded values exceed Residential GWSLs- * Amec Foster Wheeler calculated a site-specific Groundwater to Indoor Air Attenuation factor (AF) to derive a site-specific Residential GWSL (as shown).
1,1,1-Trichloroethane1,1,1-Trichloroethane <0.50
Ethylbenzene 4.1Chloroform <0.501,1-Dichloroethene <0.501,1-Dichloroethane <0.501,1,2-Trichloroethane <0.50
m&p-Xylene 19.2cis-1,2-Dichloroethene <0.50Trichloroethene <0.50Tetrachloroethene <0.50
trans-1,2-Dichloroethene <0.50o-Xylene 7.1
C-3
1,1,1-Trichloroethane1,1,1-Trichloroethane 11.9
Ethylbenzene <0.50Chloroform 2.21,1-Dichloroethene 79.31,1-Dichloroethane 5.81,1,2-Trichloroethane
m&p-Xylene <1.0cis-1,2-Dichloroethene Trichloroethene Tetrachloroethene
trans-1,2-Dichloroethene 0.51o-Xylene <0.50
C-10
3.8
40.81300109
1,1,1-Trichloroethane1,1,1-Trichloroethane <0.50
Ethylbenzene <0.50Chloroform <0.501,1-Dichloroethene <0.501,1-Dichloroethane <0.501,1,2-Trichloroethane <0.50
m&p-Xylene <1.0cis-1,2-Dichloroethene <0.50Trichloroethene Tetrachloroethene <0.50
trans-1,2-Dichloroethene <0.50o-Xylene <0.50
C-9
40.8
1,1,1-Trichloroethane1,1,1-Trichloroethane <0.50
Ethylbenzene <0.50Chloroform <0.501,1-Dichloroethene <0.501,1-Dichloroethane <0.501,1,2-Trichloroethane <0.50
m&p-Xylene 1.7cis-1,2-Dichloroethene <0.50Trichloroethene 1.3Tetrachloroethene <0.50
trans-1,2-Dichloroethene <0.50o-Xylene 0.58
C-5 1,1,1-Trichloroethane1,1,1-Trichloroethane <0.50
Ethylbenzene <0.50Chloroform 0.511,1-Dichloroethene <0.501,1-Dichloroethane <0.501,1,2-Trichloroethane <0.50
m&p-Xylene <1.0cis-1,2-Dichloroethene <0.50Trichloroethene 2.4Tetrachloroethene <0.50
trans-1,2-Dichloroethene <0.50o-Xylene <0.50
C-8
0 200100 Feet
F:\AMEC_Projects\2015\6228-12-0051 Atherton Mill Proposal\GIS\MXDs\Project\SampleLocations.mxd, User: maddison.sutton; Date: 4/8/2016 9:27:14 AM, Checked by: AF Date: 4/8/2016
FORMER MAXIMUM CONCENTRATION SAMPLE LOCATIONSATHERTON MILL, CHARLOTTE, NORTH CAROLINA
1PROJECT NO:FIGURE NO:6228-12-0051
0 280140Feet
1 inch = 140 feet
¯
Vicinity Map
X
L E G E N D
ALTA/ACSM LAND TITLE SURVEYCOPYRIGHT 2006
78.8'
77.0'63.0'75.7'
84.6'
84.6'
75.9'17.1'
201.7'
3
1.9
'
1
5.0
'
7
8
.
0
'
2.
5
'
7
4.1
'
1
5
4
.
2
'
4
.
7
'
3
5.
0
'
4
.
4
'
3
.6
'
1-story brick building"ATHERTON MILL"
wood dock
1 0 s p a c e s
7 s p a c e s + 1 H c p .
14 spaces
wood ramp
s i g n
10 spaces
7
s
p
a
c
e
s
8

s
p
a
c
e
s
9

s
p
a
ces
6 s p a c e s + 2 H c p .
b rick
concrete median
b ri ck
br i c k
a/c
17 spaces
14 spaces
1
0
s
p
aces
3 spaces + 2 Hcp.
3 spaces + 2 Hcp.
concrete walk
concrete
t ank concrete patio
U T
UT
UT
U
T
UT
UT
U
T
xchain link fence
e
ntra
n
c
e
d
riv
e
w
a
y
covered
entrance
br ic k
1
6

s
p
a
c
e
s
17

spa
c
e
s
9

s
p
a
c
e
s
1
9

s
p
a
c
es
x
x
x
c o n c r e t e
T
concrete ap ron
2 -s tor y br ick
1-story metal building"Trolley Barn"
2-story stucco building"South End Brewery"
party wall
c o nc .
p la t f o rm
w o o d
p l a t f o r m
S o u t h
B l v d .
R a i l r o a d
T r e m o n t A v e .
S . T r y o n S t .
2000-2140 SOUTH BOULEVARD CHARLOTTE, MECKLENBURG COUNTY, N.C.
sign
brick wall
fence d
dump st er
a re a
c u r b a n d g u t t e r
c u r b
con
c.
asphalt
asphalt
curbconc. sidewalk
light
light
concrete
c
o
n
cre
t
e

w
a
l
k
gravel
electric meters
concrete
c
o
n
c
r
ete

w
a
l
k
fence
planter plant er plan ter planter planter42.8'
2 7 4 .7 '
r a i s e d c o n c . p a t i o
o v e r h a n g
c o n c r e t e r a m p
c o n c . w a l k
metalutilitybldg.m et a l fe n ce
754.7
I . P i n
F o u n d
asphalt
asphalt
as p h a lt
curb and gutter
PROPOSED R/W
(per Zoning Ordinance)
wood deck/ramp
4 spaces9 spaces 9 spaces 7 spaces 8 spaces
concrete sidewalk conc. swale
16.0'
2 4 .0 '
1-story stucco buildingwith basement
100.0'
10.3'79.5'10.2'
1 2 0 .0 '
1 2 0 .0 '1-story block buildingNo. 2130
42.8'17.2'
59.3'
9 0 .0 '
8 7 .6 '
2 .4 '1
4

s
p
a
c
es
1
4

s
p
a
c
es
1
4

s
p
a
c
es
1
4

s
p
a
c
es
concrete
3 spaces
3 spaces
7 spaces + 2 Hcp.
concreteconcrete
concrete
c o n c r e t e
s i g n
covered entrance
7 spaces
3 spaces c o n c .
6 s p a c e s
c o n c r e t e w a l k
1 s p a c e + 4 H c p .
f e n c e d
d u m p s t e r
a r e a
brick wall
1 -s t o r y b l o c k b u i l d i n g
x
x x x x x x x x x x x x xfenceddumpsterarea
c o n c.
14 spaces
fenceddumpsterarea
c o nc .
3 s p a c e s
4 spaces
c o n c r e t e
d e c k
ch im ney
conc .walk
concrete walk d
e
c
k
w a l l
w a l l
conc. walk
asphalt
asphalt
8 spaces
c onc .walk
No. 2140
1-story brick building
asphalt
asphalt
asphalt
asphalt
asphalt
3 9 .6 '
30.5'
7 5 .1 '
sig
n
c
o
n
c
.
c onc .c o nc .
dock
u
tilit
y
s
e
rvic
e concrete shelf
c
u
r
b
curbu
t
ilit
y
s
e
r
vic
e
SHEET 1 OF 2
PROPOSED R/W(per Zoning Ordinance)
this area currentlyunder constructionconc. retaining wallconc. retaining wall
railroad track (new light rail line)
railroad track (new light rail line)
railroad track (new light rail line)
railroad track (new light rail line)
X X
XX
X
concrete
fenced area spur line
spur line
approx. party wall
this area currentlyunder construction
CATSmanholesspur line
concrete
3 s p a c e s
+ 1 H c p .
asphaltdriveway
this area underconstruction
brick area
10 spaces (not striped)
5 s p a c e s (n o t s t r i p e d )
brick drive
c ur b
3 s p a c e s
6 spaces
steps
c o n c r e t e w a l k
12 spaces
8 spaces
3 spaces
brick walk
46,340 S.F. (exterior footprintat ground level)
24,980 S.F. (exteriorfootprint at ground level)
7,910 S.F.(exterior footprint at ground level)
134.4'
5
8
.
8'
(
5
8.8
')
(2
7
4
.
8
')
c a n o p y
"TremontStation"wall
brick/conc.
rampramp
11,670 S.F. (exterior footprintat ground level)
5,370 S.F. (exterior
footprint at gRound level)
conc.
3 s p a c e s + 2 H c p .
canopy
(drive thru lanes
un derne a th)
6 spaces
drive-thru lane
drive-thru lane
drive-thru lane
3 s p a c e s + 1 H c p .
c o n c r e t e
"Wachovia"
ATM machine
sidewalk sidewalk
sidewalk
s i d e w a l k
interior corridor
i
n
t
erio
r

c
o
r
rid
or
in
t
e
ri
o
r

c
o
rr
i
d
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i
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t
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rio
r

c
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rri
d
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r
Height 18.6'
Height 15.1'
Height 11.8'
Height 14.1'
Height 25.8'
Height 32.4'
Height 16.0'
Height 48.3'Height 33.0
B-1
B-2
B-3
B-1
B-4
B-5
B-9
B-6
B-7
B-8
SOUTH BOULEVARD
A V E .
M c D O N A L D
A V E .
M A G N O L I A
A
V
E
.
C
L
E
V
E
L
A
N
D
S O U T H B O U L E V A R D
W . T R E M N O N T A V E . 5 0 '
B-10
!(!(!(!(!(!(!(
!(
!(
MW-14A
MW-14
OF-4 A-15A A-19B A-40B
MW-5
SG-12
SG-9
Constituent SG-1 SG-2 SG-3 SG-4 SG-5 SG-6 SG-7 SG-8 SG-9 SG-10 SG-11 SG-12 DWM Residential
Sub-Slab SGSLs
DWM Non-Residential
Sub-Slab SGSLS
Acetone 88.9 84.3 119 21.2 227 56.4 124 56.2 499 39.3 37.3 17.2 216,000 2,720,000
Benzene 1.1 0.48 0.92 0.76 3.7 <0.44 1.9 0.74 1.6 0.54 0.58 2.6 120 1,570
Bromomethane <1.1 1.2 <1.1 <1.2 <1.1 <1.1 <1.1 <1.1 <2.3 <1.1 <1.1 <1.2 NSL NSL
2-Butanone (MEK)17.2 10.3 15.9 4.9 95.2 3.8 11.2 6.9 25.4 6.8 3.3 1.3 34,800 438,000
Carbon disulfide 2.2 99.8 98.7 <0.94 25.9 7.6 24.9 2.6 38.1 <0.91 <0.91 <0.98 4,870 61,300
Carbon tetrachloride <0.92 <0.92 <0.86 <0.95 <0.92 <0.86 <0.86 <0.92 <1.8 <0.92 <0.92 1.0 156 2,040
Chloroethane <0.78 151 <0.72 <0.80 <0.78 <0.72 <0.72 <0.78 <1.6 <0.78 <0.78 <0.84 NSL NSL
Chloroform <1.4 <1.4 <1.3 2.5 4.3 2.9 9.2 2.7 <2.9 3.3 <1.4 26.1 40.7 533
Chloromethane <0.60 <0.60 <0.56 <0.63 <0.60 <0.56 <0.56 <0.60 <1.2 <0.60 0.96 <0.65 626 7,880
Cyclohexane 1.2 1.5 2.2 2.3 <1.0 <0.94 <0.94 <1.0 5.0 <1.0 <1.0 1.1 6,950 526,000
1,4-Dichlorobenzene <1.8 <1.8 <1.6 2.3 9.7 <1.6 <1.6 <1.8 <3.5 <1.8 <1.8 <1.9 85.1 1,110
Dichlorodifluoromethane 2.5 2.8 2.8 2.5 3.5 2.9 3.1 2.6 <2.9 3.2 3.3 2.8 695 8,760
1,1-Dichloroethane <1.2 <1.2 <1.1 <1.2 <1.2 <1.1 <1.1 <1.2 <2.4 <1.2 <1.2 3.7 585 7,670
1,2-Dichloroethane <059 <0.59 0.64 <0.61 <0.59 <0.55 <0.55 <0.59 <1.2 <0.59 <0.59 <0.64 36 472
1,1-Dichloroethene <1.2 <1.2 <1.1 <1.2 <1.2 <1.1 <1.1 2.6 <2.3 <1.2 <1.2 10,500 1,390 17,500
cis-1,2-Dichloroethene <1.2 <1.2 <1.1 <1.2 <1.2 10.2 <1.1 <1.2 <2.3 <1.2 <1.2 96.7 NSL NSL
trans-1,2-Dichloroethene <1.2 <1.2 <1.1 <1.2 <1.2 <1.1 <1.1 <1.2 <2.3 <1.2 <1.2 14.4 NSL NSL
Ethylbenzene 1.4 <1.3 2.6 <1.3 7.1 <1.2 <1.2 <1.3 3.8 <1.3 <1.3 <1.4 374 4,910
4-Ethyltoluene <1.4 <1.4 4.8 <1.5 8.2 <1.3 <1.3 <1.4 6.6 <1.4 <1.4 <1.6 NSL NSL
n-Heptane 2.4 <1.2 <1.1 1.3 <1.2 <1.1 <1.1 1.4 2.5 <1.2 1.5 <1.3 NSL NSL
n-Hexane <1.0 <1.0 <0.96 2.6 <1.0 15.9 37.0 12.9 <2.1 <1.0 <1.0 <1.3 4,870 61,300
2-Hexanone <1.2 2.2 3.9 <1.2 21.9 <1.1 1.9 1.5 7.8 2.1 <1.2 <1.3 209 2,630
Methylene Chloride <1.0 <1.0 <0.95 5.6 <1.0 58.4 71.5 26.4 <2.0 <1.0 1.5 <1.1 4,170 52,600
4-Methyl-2-pentanone (MIBK)<1.2 1.6 1.9 <1.2 10.1 <1.1 2.4 <1.2 3.3 <1.2 <1.2 <1.3 20,900 263,000
Naphthalene 6.5 2.8 5.7 2.3 11.4 <1.4 <1.4 89.2 197 7.3 3.4 <1.7 20.9 263
Styrene 2.6 <1.3 3.6 <1.3 <1.3 <1.2 <1.2 <1.3 2.8 <1.3 <1.3 <1.3 6,950 87,600
Tetrachloroethene (PCE)1.5 2.2 1.9 3.0 14.4 11,100 17,100 27.2 24.2 8.5 1.8 30,200 278 3,500
Tetrahydrofuran <0.86 <0.86 4.0 <0.89 <0.86 <0.80 <0.80 <0.86 <1.7 <0.86 <0.86 <0.93 13,900 175,000
THC as Gas 2,900 1,170 1,780 1,510 2,080 4,730 5,690 955 3,450 1,610 246 9,890 NSL NSL
Toluene 5.4 8.0 23.0 5.5 170 5.6 5.7 3.1 16.7 <1.1 1.9 1.7 34,800 438,000
1,2,4-Trichlorobenzene <2.2 <2.2 2.8 <2.2 <2.2 <2.0 <2.0 <2.2 <4.3 <2.2 <2.2 <2.3 13.9 175
1,1,1-Trichloroethane <1.6 <1.6 <1.5 <1.7 5.9 71.4 184 1.6 5.8 2.2 <1.6 1,490 34,800 438,000
Trichloroethene (TCE)<0.79 1.1 3.8 <0.82 95.1 26,200 37,400 39.3 87.9 3,330 8.9 94,600 13.9 175
Trichlorofluoromethane 17.6 <1.6 <1.5 <1.7 <1.6 1.6 1.8 1.7 <3.3 1.7 1.8 1.9 NSL NSL
1,2,4-Trimethylbenzene 3.7 7.3 28.9 5.5 43.2 2.1 2.1 5.0 21.2 2.1 1.9 <1.5 48.7 613
1,3,5-Trimethylbenzene 2.0 2.6 8.7 3.1 14.1 <1.3 <1.3 2.2 7.5 1.5 <1.4 <1.5 NSL NSL
m&p-Xylene 5.2 2.7 6.3 <2.6 32.5 <2.4 2.6 <2.5 14.0 <2.5 3.4 <2.7 695 8,760
o-Xylene 2.7 1.4 3.8 1.6 15.4 <1.2 <1.2 <1.3 6.1 <1.3 1.4 <1.4 695 8,760
Helium <5.8 <3.8 11.5 <3.8 <3.2 <4.2 <3.3 <4.4 <9.6 <4.4 <5.9 <5.0 NSL NSL
Notes:
1. Concentrations shown in µg/m3 Prepared By/Date:AJF 4/8/2016
2. DWM = Division of Waste Management
3. NSL = No standard lists Checked By/Date:RCF 4/8/2016
4. Bold values indicate a concentration exceeding the laboratory reporting limit
5. Shaded values indicate a concentration exceeding the DMW Residential Sub-Slab SGSLs
6. THC = Total Hydrocarbons
7. Helium was used as a leak check
8. Samples collected on October 10, 2012
9. Blue shaded values indicate a concentration exceeding the DWM Non-Residential Sub-Slab SGSLs
10. SGSLs = Soil-Gas Screening Levels, dated March 2016
Summary of Sub-Slab Soil-Gas Analytical Results
Atherton Mill Property
Charlotte, North Carolina
Amec Foster Wheeler Project: 6228-12-0051
PREPARED
BY
DATE CHECKEDBY DATE JOB NUMBER FIGURE012024036048060Feet 16228-12-0051
Source: http://imagery.nconemap.com/arcgis/services/2010_Orthoimagery/ImageServer
§¨¦277 §¨¦77
BUILDING 1
BUILDING 2
BUILDING 3
BUILDING 4
IA-7 SG-11
SG-5
SG-6
SG-4
SG-2
SG-1
SG-8
SG-9
SG-12
SG-10
SG-3
SG-7
NC OneMap, NC Center for Geographic Information and Analysis, NC 911 Board
SUB-SLAB VAPOR SAMPLING LOCATIONSATHERTON MILL PROPERTY2000, 2100, 2130 & 2140 SOUTH BOULEVARDCHARLOTTE, NORTH CAROLINASub-Slab Vapor Samples Collected on October 10, 2012
JMS RCF5/11/16 5/11/16
Proposed Sub-Slab Vapor Samples Not Collected
IASL (A)IASL (B)IASL (C)
TCR = 1.0E-
06
TCR = 1.0E-
05
TCR = 1.0E-
04
Date Sample Collected 6/3/2014 6/3/2014 6/3/2014 6/3/2014 6/3/2014 6/3/2014 6/3/2014 6/3/2014 6/3/2014 6/3/2014 9/12/2014 9/12/2014 9/12/2014 9/12/2014 9/12/2014 9/12/2014 9/12/2014 THQ = 0.2 THQ = 0.2 THQ = 0.2
Benzene 6.0 <3.3 0.38 J 0.63 <2.3 0.34 J <2.5 0.30 J <0.68 0.25 J 0.79 J 0.72 J 1.5 1.7 0.53 J 0.72 J 0.51 J 1.57 C 15.7 C 26.3 NC
Carbon tetrachloride 3.0 <12.8 <2.5 <1.9 <9.2 0.53 J <9.9 0.47 J <2.7 0.46 J 1.9 J 1.6 J 2.1 1.5 J 1.5 J 1.6 J 1.6 J 2.04 C 20.40 C 87.6 NC
Chloroform 3.4 <9.9 <1.9 <1.5 <7.1 <1.5 <7.7 <1.4 <2.1 <1.3 5.5 <0.71 2.9 1.9 <0.71 <0.71 11.1 0.533 C 5.33 C 53.3
1,4-Dichlorobenzene 3.2 <12.2 <2.4 16.3 <8.8 <1.9 <9.5 <1.8 <2.5 <1.6 <2.0 <1.8 <1.8 <1.8 <1.8 <1.8 <1.8 1.11 C 11.1 C 111 C
1,2-Dichloroethane 1.8 <4.1 <0.79 <0.61 <3.0 <0.64 <3.2 <0.59 <0.85 <0.55 <0.66 1.4 1.9 <0.59 <0.59 0.65 <0.59 0.472 C 4.72 C 6.13 NC
Ethyl acetate 4.2 <7.3 <1.4 1.9 4.7 J <1.1 4.4 J 2.1 2.7 5.1 4.9 4.9 62.4 10.1 6.1 36.7 4.7 61.3 NC 61.3 NC 61.3 NC
Ethylbenzene 6.2 <8.8 1.8 <1.3 <6.3 1.0 J 4.7 J 0.96 J 2.4 1.5 2.2 1.4 4.3 1.2 J 1.9 8.6 0.62 J 4.91 C 49.1 C 491 C
Tetrachloroethene (PCE)3.2 <13.8 <2.7 <2.1 240 19.3 10.1 J 1.3 J 3.7 0.92 J 0.84 J <0.99 <0.99 <0.99 <0.99 5.7 16.7 35 NC 35 NC 35 NC
Trichloroethene (TCE)3.1 <10.9 0.97 J 1.1 J 4.3 J 1.8 11.1 17.6 14.4 5.2 46.4 4.0 2.9 1.5 0.94 9.1 6.8 1.75 NC 1.75 NC 1.75 NC
1,2,4-Trimethylbenzene 2.9 <10.0 1.5 J <1.5 14.7 11.6 6.3 J 1.9 3.1 1.8 4.4 J 2.7 J 10.5 1.4 J 3.5 J 3.2 J 0.63 J 6.13 NC 6.13 NC 6.13 NC
Notes:
1. Concentrations shown in µg/m3
2. Shaded values indicate a concentration exceeding the Indoor Air and Crawlspace Screening Levels
IA-P IA-QIA-A IA-C IA-E IA-G IA-H IA-I
Tox Basis Tox Basis Tox Basis
Indoor Air and Crawlspace Screening Level (IASL)1,2
µg/m3
Amec Foster Wheeler Project: 6228-12-0051
Charlotte, North Carolina
IA-F
Indoor Air/Crawlspace Screening Levels at Target Risk 1.0E-04 (IASL C) to be
Used if only One Carcinogen is PresentIA-J IA-M IA-N IA-O
Atherton Mill Property
Summary of Indoor Air Analytical Results
IA-BConstituent IA-D IA-R IA-S

Correspondence: Amec Foster Wheeler Environment & Infrastructure, Inc. 1308 Patton Avenue Asheville, North Carolina 28806 Tel [phone]
NC Engineering License No. F-1253
DRAFT – FOR DISCUSSION PURPOSES ONLY

January 15, 2016

Ms. Carolyn Minnich, Brownfields Project Manager North Carolina Department of Environment and Natural Resources
Division of Waste Management
Brownfields Program 1646 Mail Service Center
Raleigh, North Carolina 27699-1646

Subject: Vapor Mitigation System Construction Package
Atherton Mill Property Including Units 85, 87, 130, 170, 160, 165, and
Corridors/Closets/Bathrooms
2000 South Boulevard, Charlotte, Mecklenburg County, North Carolina
Brownfields Project Number: 10047-06-60
Amec Foster Wheeler Project: 6228-12-0051

Dear Ms. Minnich:

On behalf of Atherton Mill (E&A), LLC (Owner), Amec Foster Wheeler is pleased to provide this
Vapor Mitigation System Construction Package for Units 85, 87, 130, 170, 160, 165, and ancillary
corridors and closets/bathrooms in Building 1 at the Atherton Mill property in Charlotte, North
Carolina. This vapor mitigation system information is being submitted in response to meetings
and communications in late 2015 concerning vapor mitigation at the property. This construction
package provides information on the following: 1) installation of a Land Science Technologies™
Geo-Seal® retrofit vapor mitigation system in Units 85, 87, and 170; 2) installation of a Geo-
Seal® Vapor Intrusion Barrier® and vapor vent system in Units 160, 165, 130, the corridors to
the north, east, and south of Unit 170, and the corridor north of Unit 80; and, 3) sealing of floor
penetrations in adjacent bathrooms, utility closet, and electrical closet, and sealing of floors
using Geo-Seal® Retro-CoatTM. These areas are noted as Phases 2, 3A, 3B, and 4 on the
attached Scope and Phasing Plan/Vapor Mitigation Plan (dated December 10, 2015).

To mitigate volatile organic compounds and semi-volatile organic compounds detected in the
indoor air samples collected from the above areas, Owner will remove and dispose of existing
2.5-inch thick wood block flooring which rests on a concrete slab in portions of the Phase 2 and
3A/B areas. After wood block flooring removal, the Geo-Seal® Vapor Intrusion Barrier® retrofit
Vapor Mitigation Construction Package January 15, 2016
Atherton Mill Property Including Units 85, 87, 130, 170, 160, 165
and Corridors/Closets/Bathrooms
Amec Foster Wheeler Project: 6228-12-0051

vapor mitigation system, including a Geo-Seal® vapor mat/drain, will be installed on the top of
the existing concrete slab in Units 85, 87, and 170. A new approximately two-inch thick topping
slab will be constructed on top of the retrofit vapor mitigation system in Units 85, 87, and 170.
Vent riser piping will be installed, connected to the vapor mat, and routed to the roof for
discharge. At this time, installation of in-line fans is not proposed. However, the discharge vent
ends will be equipped with AV-3-PVC Aura ventilator caps that will draw a vacuum on the
system when the wind blows.

In Units 130, 160, 165, the corridors to the north, east, and south of Unit 170, and the corridor
north of Unit 80, the existing concrete slab will be removed and the subgrade will be leveled to
design elevation and an approximate four-inch thick layer of wash stone will be placed in the
areas. A Land Science Technologies™ Geo-Seal Vapor Intrusion Barrier® and Vapor-Vent™
vapor collection system will be installed by a Geo-Seal certified contractor on top of and
within the wash stone layer prior to construction of a new four-inch thick concrete floor slab.
The vapor vent collection systems will connect to vent riser pipes that will be extended through
the roof of the structure. At this time, installation of in-line fans is not proposed. However, these
discharge vent ends will also be equipped with ventilator caps that will draw a vacuum on the
system when the wind blows. This approach is the same as the vapor mitigation system
completed in Unit 80 (which includes former Unit 75). After construction of the new concrete
floor slab in the corridors, new replacement wood block flooring will be installed to comply with
Charlotte-Mecklenburg Historic Landmarks Commission directions.

As shown in the Scope and Phasing Plan/Vapor Mitigation Plan (dated December 10, 2015),
penetrations in the adjacent bathrooms, utility closet, and electrical closet floors will be sealed
with Geo-Seal® products, and the concrete floor slab in the utility closet and electrical closet will
be coated using Geo-Seal® Retro-CoatTM. These sealant products provide a barrier on existing
surfaces to block vapors from entering the space above.

Information on the Geo-Seal® products is attached, and includes: manufacturer product data
sheets, component specifications, and system drawings/details. Construction drawings showing
the layout of the vapor vent systems, the anticipated vent risers, and details of the Geo-Seal®
vapor mat/drain and barrier are included at the end of this document.

Amec Foster Wheeler will perform oversight of the system installation, as well as perform
quality assurance testing of the system in accordance with the manufacturer’s requirements.

Vapor Mitigation Construction Package January 15, 2016
Atherton Mill Property Including Units 85, 87, 130, 170, 160, 165
and Corridors/Closets/Bathrooms
Amec Foster Wheeler Project: 6228-12-0051
 If you have any questions concerning this vapor mitigation construction package, please contact
Mr. Matt Wallace at [phone].

Sincerely,

Amec Foster Wheeler Environment & Infrastructure, Inc.

DRAFT – FOR DISCUSSION PURPOSES ONLY

Matthew E. Wallace, P.E. Robert C. Foster, L.G.
Associate Engineer Project Manager

MEW/RCF:mew
cc: Mr. Jim McKenney, Atherton Mill (E&A), LLC
attachments: Scope and Phasing Plan
Vapor Mitigation Construction Package

EXISTINGRESTROOMS
EXISTING
RESTROOM
EXISTING
RESTROOMS
PHASE 3A
PHASE 2
PHASE 1B
(COMPLETE)
EXTERIOR WALKWAY
Existing Chimney
EXTERIOR WALKWAY
EXTERIOR WALKWAY
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EXTERIOR WALKWAY
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REPLACE CORRIDOR FLOOR
WITH SEALED CONCRETE
EXTERIOR WALKWAY
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EXTERIOR WALKWAY
Exist.Conc.
Exist.Conc.
Exist.Conc.
Exist.VCT
PHASE 4
PHASE 1D
(COMPLETE)
PHASE 1A
(COMPLETE)
UNIT #70
2,836 SF
BASEMENT VENTILATION SYSTEM
GEO-SEAL RETROFIT SYSTEM
FULL SLAB REPLACEMENT
WITH GEO-SEAL SYSTEM
SEAL CONRETE AND ALL FLOOR PENETRATIONS
SEAL ALL FLOOR PENETRATIONS
(NO SUB-SLAB PROPOSED)
UNIT #80
8,659 SF UNIT #85
1,604 SF
UNIT #87
5,608 SF
UNIT #170
8,193 SF
UNIT #130
1,584 SF
UNIT #120
1,661 SF
UNIT #140
1,384 SF
UNIT #150
2,732 SF
UNIT #160
3,898 SF
Existing
Elevator
Shaft
REPLACEMENT WOOD BLOCK FLOOR AREA
SSDS WITH FANS
UNIT 120 UNIT 140
UNIT 140 UNIT 150
TEMPORARY WALL
During the initial portion of Phase 2 prior to ramp
construction in front hallway, a temporary wall shall
be constructed and existing hallway in this area to
remain in order to provide ADA access to Unit 85.
Once ramp is constructed a temporary wall will be
constructed at the Phase 2/3B hallway intersection.
TEMPORARY WALL DURINGDEMOLITION AND MOST OF
CONSTRUCTION. REMOVED AT
SOME POINT IN TIME TO
COMPLETE PHASE 2A
PHASE 3B
Temporary Phase 2
Ramp
UNIT #155
1,755 SF
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Vapor Mitigation System Construction Package
Atherton Mill Property - Including Units 85, 87, 130,
170, 160, 165, and Corridors/Closets/Bathrooms

2000 South Boulevard
Charlotte, Mecklenburg County, North Carolina
Brownfields Project Number: 10047-06-60
Amec Foster Wheeler Project: 6228-12-0051

1. Manufacturer product data sheets
2. Component specifications
3. General Notes
4. Vapor mitigation system drawings/details

January 15, 2016

Amec Foster Wheeler Environment & Infrastructure, Inc.
1308 Patton Avenue
Asheville, North Carolina 28806
NC Engineering License No. F-1253

DRAFT – FOR REVIEW PURPOSES ONLY
NOT FOR CONSTRUCTION

1. Manufacturer Product Data Sheets

™Geo-Seal
Advanced Vapor Management Technology
www.landsciencetech.com
Land Science Technologies (LST) ™ is dedicated to
providing advanced technologies for sustainable land
development. A goal of LST is to provide innovative
and technically sound development solutions for
underutilized environmentally impaired properties,
commonly referred to as Brownfields.
LST’s cost-effective, industry leading technologies
offer engineering firms and real estate developers
solutions to issues facing the development of
Brownfields today. LST is a division of
Regenesis, Inc., a global leader in groundwater
and soil remediation technologies since 1994.
www.regenesis.com
HISTORY
™Geo-Seal
Geo-Seal™ is an advanced composite gas vapor management
technology (patent pending) designed to eliminate potential indoor
air quality health risks associated with subsurface contaminant vapor
intrusion.

Geo-Seal is an ideal gas vapor management technology designed for
use on Brownfields or any type of environmentally impaired site,
i.e. manufacturing facilities, dry cleaners, gasoline service stations,
landfills, etc. Geo-Seal is placed between the foundation of the
building and the soil pad to eliminate vapor exposure pathways and
stop contaminated vapors from permeating through the slab. Vapor
management systems incorporating both Geo-Seal vapor barrier and
Vapor-Vent ventilation provide industry leading sub-foundation vapor
mitigation technology. By deploying these systems developers ensure a
healthy indoor environment while reducing the cost of site remediation
and expediting site construction.
Triple-Layer Protection
The triple-layer system used in Geo-Seal provides maximum
redundancy and protection against the formation of vapor pathways
both during and after installation. Such pathways can result from
chemically induced materials breakdown, punctures, and seam
weaknesses resulting from poor detail work and/or application
installation imperfections around penetrations. Geo-Seal also provides
unmatched protection from a range of contaminant vapors including
those from petroleum-based products and chlorinated hydrocarbons.
Field-Proven Technology
Geo-Seal is manufactured in partnership with E-Pro™ Systems which
has over 20 years experience in the building products industry and a
leading track record in barrier systems for vapor and waterproofing
applications.
PRODUCT
FEATURES
Dual Chemical Resistant Layers
The BASE layer (bottom) and the BOND layer (top)
are composed of a high-density polyethylene material
bonded to a geo-textile on the out-facing side. High
density polyethylene is known for chemical resistance,
high tensile strength, excellent stress-crack resistance
and for highly reliable subsurface containment. The
geo-textile which is physically bonded to the chemical
resistant layer accomplishes two goals; it allows the
BOND layer to adhere to slab, and provides a friction
course between the BASE layer and the soil.
Spray Applied CORE Layer
The CORE layer is composed of a unique, elastic
co-polymer modified asphaltic membrane which
also provides additional protection against vapor
transmission. This layer creates a highly-effective seal
around slab penetrations and eliminates the need for
mechanical fastening at termination points.
Chemical Resistance
The dual chemical resistant layers combined with
the spray CORE form a barrier resistant to the most
concentrated chemical pollutant vapors.
Enhanced Curing
Geo-Seal is “construction friendly” as the reduced
curing time of the Geo-Seal CORE layer and the
ability to apply it in cooler temperatures ensures quick
installation and minimizes the impact on construction
schedules.
Puncture Resistance
Geo-Seal forms a highly puncture resistant barrier that
greatly reduces the chance of damage occurring after
installation and prior to the placement of concrete.
Removing Contained Vapors
Vapor-Vent can be used in conjunction with Geo-Seal
to alleviate the buildup of vapors beneath structures
as a result of vapor barrier implementation. Vapor-
Vent can be utilized as an active or passive ventilation
system depending on the requirements of the design
engineer.
Certified Applicator Network
The application of Geo-Seal and Vapor-Vent can be
performed by any one of many certified applicators
throughout the country.
Service and Support
Geo-Seal representatives are available to provide job
and site specific assistance. A local representative can
ensure Geo-Seal and Vapor-Vent is installed as per the
specification.
Geo-Seal™ Triple-Layer System
(2 Chemical Resistant Layers + 1 Spray Applied Core Layer)
DIAGRAM
3
2
1
1
2
3
™Geo-Seal™Geo-Seal
44
Geo-Seal CORE is the spray-applied, middle layer
of the Geo-Seal barrier that ensures proper sealing
of potential vapor pathways. Problematic pipe
penetrations and effective seals at
termination points are easily detailed and
sealed with the utilization of the CORE Layer.
Geo-Seal BOND is the
proprietary top layer that
completes the triple layered
Geo-Seal barrier.
The BOND layer
serves two purposes;
it helps protect the
system from getting
punctured
after
installation
and provides
the final layer
of chemical
resistance.
Vapor-Vent:•When used with Geo-Seal
provides maximum protection
against contaminated vapor•Eliminates the need for trenching•Cost-effective compared to pipe and
gravel systems•Eliminates long-term costs when configured
as a passive system•Allows for rapid installation
Application Diagram
Diagram LabelsGeo-Seal BASE is the foundational, chemical resistant, bottom layer that is rolled out onto the exposed soil surface. This layer is applied with a geo-textile side facing down to provide greater friction with the soil surface. The Geo-Seal BASE Layer is a high-quality substrate and enables the second, spray-applied CORE Layer to be free of
shadowing and pinholes.
Land Science Technologies
1011 Calle Sombra
Suite 110
San Clemente, CA 92673
Ph. 949-366-8000
Fax. [phone]
www.landsciencetech.com

Geo-Seal™ CORE

Geo-Seal™ CORE is an elastic water-based co-polymer modified asphaltic membrane spray
applied to a minimum dry thickness of 60 mils. The CORE material has exceptional bonding to a wide variety of substrates and will build up to the specified thickness in a single application.
Since the CORE material is water-based, there is little or no odor during or after product application, making it safe for use in sensitive areas. This material can also be applied to green concrete as it exhibits exceptional bonding capability that will not delaminate from the intended
substrate. The seamless application of the CORE material makes for easy installation around penetrations, uneven surfaces and oddly shaped areas.

COVERAGES TEST METHOD UNITS
Application to BASE Layer 60 mils (17 ft2/gal)

Typical Uncured Properties
Specific Gravity ASTM D 244 1.00
Viscosity ASTM D 1200 >25 centipoise
PH 12.3
Flammability ASTM D 3143 5000 F
Color Brown to Black
Non-Toxic No Solvents
Shelf Life 6 months

Typical Cured Properties
Tensile Strength ASTM 412 32 psi
Elongation ASTM 412 4.140%
Resistance to Decay ASTM E 125 Section 13 4% Perm Loss
Accelerated Aging ASTM G 23 No Effect
Moisture Vapor Transmission ASTM E 96 0.088 g / ft2 per hour
Hydraulic Water Pressure ASTM D 751 26 psi
Perm Rating ASTM E 96 (US Perms) 0.21
Methane Transmission Rate ASTM D 1434 Passed
Adhesion to Concrete & Masonry ASTM C 836 & ASTM C 704 11 lbf / inch
Hardness ASTM C 836 80
Crack Bridging ASTM C 836 No Cracking
Low Temp Flexibility ASTM C 836-00 No Cracking at -200 C
Resistance to Acids
Acetic 30%
Sulfuric and Hydrochloric 13%
Temperature Effect:
Stable 2480 F
Flexible 130 F
Packaging: 330 gal. totes or 55 gal. drums
Approvals: City of Los Angeles RR# 25478, NSF

Land Science Technologies, Inc. / 1011 Calle Sombra / Suite 110 / San Clemente / CA / 92673
Ph. 949-366-8000 / F. 949- 366-8090
www.landsciencetech.com
Product Data
Sheet

Geo-Seal™ CORE DETAIL

Geo-Seal™ CORE DETAIL is ideally used to perform detailing and repairs to the Geo-Seal
system. It is also ideal for those areas where the necessary clearance is not available for the application of the Geo-Seal spray. This proprietary and unique material can be used all at once
or over a period of a few days without breaking down or hardening. Geo-Seal CORE DETAIL is water-based and can be applied to green concrete with exceptional bonding capability that will not delaminate from the intended substrate. Geo-Seal CORE DETAIL’s viscosity allows high
build applications to be done easily due to its ability to set quickly and get jobs done fast.

PROPERTIES TEST METHOD UNITS

TYPICAL UNCURED PROPERTIES
Specific Gravity 1.034
Viscosity 9m-13m centipoise
PH 11.5
Flammability 2700 F
Color Brown to Black
Non-Toxic No Solvents
Shelf Life 6 months

TYPICAL CURED PROPERTIES
Initial Cure 30 minutes
Final Cure 24-24 hours
Tensile Strength ASTM 412 32 psi
Elongation ASTM 412 3.860%
Resistance to Decay ASTM E 125 Section 13 9% Perm Loss
Accelerated Aging ASTM G 23 No Effect
Moisture Vapor Transmission ASTM E 96 0.088 gal/ft2 per hour
Hydrostatic Water Pressure ASTM D 751 28 psi
Perm Rating (US Perms) ASTM E 96 0.17
Methane Transmission Rate ASTM D 1434 0
Adhesion to Concrete & Masonry ASTM C 836 7 lbf/inch
Hardness ASTM C 836 85
Crack Bridging ASTM C 836 No Cracking
Low Temp Flexibility ASTM C 836-00 No Cracking at -200 C
Resistance to Acids
Acetic 30%
Sulfuric and Hydrochloric 15%

COVERAGES
60-mils (dry) 19 ft2/gal
Packaging: Available in 1 or 5 gal. buckets
Approvals: City of Los Angeles RR# 25478 (for methane and waterproofing), NSF Standard 61 for potable water containment

Land Science Technologies, Inc. / 1011 Calle Sombra / Suite 110 / San Clemente / CA / 92673 Ph. 949-366-8000 / F. 949- 366-8090
www.landsciencetech.com
Product Data
Sheet

Geo-Seal™ BASE Layer

The Geo-Seal™ BASE layer is comprised of a high strength laminated HDPE membrane that is
thermally bonded to a polypropylene geotextile giving the BASE layer a high puncture resistance (Class A Rating) as well as high chemical resistance. The BASE layer is installed
over the substrate with the HDPE side facing up and provides the ideal surface for the
application of the Geo-Seal CORE component.

PROPERTIES TEST METHOD Geo-Seal BASE Film Thickness 5 mil Composite Thickness 18 mil Tensile @ ULT ASTM D 882 MD 37.3 lbs / in ASTM D 882 TD 32.0 lbs / in Elongation @ ULT ASTM D 882 MD 51.00% ASTM D 882 TD 55.30% Dart Impact ASTM D 1709 Method A >1070 gms Method B 594 gms Modulus ASTM D 882 MD 295.5 lbs / in ASTM D 882 TD 270.6 lbs / in Elmendorf Tear ASTM D 1922 MD 5,260 gms ASTM D 1922 TD 5,140 gms Puncture Prop. Tear ASTM B 2582 MD 11,290 gms ASTM B 2582 TD 13,150 gms Beach Puncture Tear ASTM D 751 MD 160 lb / in ASTM D 751 TD 165 lb / in Permeability (water vapor) ASTM E96 0.214 Chemical Resistance Excellent
Packaging: 15’x150’ = 100 lbs

Land Science Technologies, Inc. / 1011 Calle Sombra / Suite 110 / San Clemente / CA / 92673 Ph. 949-366-8000 / F. 949- 366-8090
www.landsciencetech.com
Product Data
Sheet

Geo-Seal™ BOND Layer

The Geo-Seal™ BOND layer is comprised of a high strength laminated HDPE membrane that is
thermally bonded to a polypropylene geotextile giving the BASE layer a high puncture resistance (Class A Rating) as well as high chemical resistance. The BOND layer is installed as
a protection course over the BASE and CORE layers with the geotextile side facing up. The
BOND layer also provides an excellent substrate and friction surface for concrete to adhere to.

PROPERTIES TEST METHOD Geo-Seal BOND Film Thickness 5 mil Composite Thickness 18 mil Tensile @ ULT ASTM D 882 MD 37.3 lbs / in ASTM D 882 TD 32.0 lbs / in Elongation @ ULT ASTM D 882 MD 51.00% ASTM D 882 TD 55.30% Dart Impact ASTM D 1709 Method A >1070 gms Method B 594 gms Modulus ASTM D 882 MD 295.5 lbs / in ASTM D 882 TD 270.6 lbs / in Elmendorf Tear ASTM D 1922 MD 5,260 gms ASTM D 1922 TD 5,140 gms Puncture Prop. Tear ASTM B 2582 MD 11,290 gms ASTM B 2582 TD 13,150 gms Beach Puncture Tear ASTM D 751 MD 160 lb / in ASTM D 751 TD 165 lb / in Permeability (water vapor) ASTM E96 0.214 Chemical Resistance Excellent
Packaging: 15’x150’ = 100 lbs

Land Science Technologies, Inc. / 1011 Calle Sombra / Suite 110 / San Clemente / CA / 92673 Ph. 949-366-8000 / F. 949- 366-8090
www.landsciencetech.com
Product Data
Sheet

Geo-Seal™ Reinforcement Fabric

The Geo-Seal™ Reinforcement Fabric is a textile material composed of staple fibers
hydraulically entangled, which is composed of 100% polyester. The basic use of the Geo-Seal Reinforcement Fabric is designed to act as reinforcement when used in conjunction
with Geo-Seal CORE spray applied membrane.

CHEMICAL EXPOSURE (at room temperature)% STRENGTHENED RETAINED

Dimethyl Formamide 1000 hours 100%
Ethylene Glycol 1000 hours 100%
1% Sodium Hydroxide 6 hours 100%
60% Sulfuric Acid 150 hours 54%
Perchlorethylene 1000 hours 100%
Acetone 1000 hours 100%
Distilled Water 1000 hours 100%
PHYSICAL PROPERTY DATA
Weight/Square (lbs.) ASTM D 3776 1.1
Oz./Sq./Yd. (oz.) ASTM D 3776 1.6
Bulk (mills) 22
Dry Tensile-MD (lbs.) ASTM D1777 25
Dry Tensile-CD (lbs.) ASTM D 1777 18
Elongation-MD (per/cent) ASTM D 1682 45
Elongation-CD (per/cent) ASTM D 1682 100
Mullen Burst (P. S. I.) ASTM D 3786 35
Packaging: 6” x 360’, 12” x 360’

Land Science Technologies, Inc. / 1011 Calle Sombra / Suite 110 / San Clemente / CA / 92673
Ph. 949-366-8000 / F. 949- 366-8090
www.landsciencetech.com
Product Data
Sheet

Geo-Seal™ VaporVent

Geo-Seal™ VaporVent is a low profile, trenchless, flexible, sub slab vapor collection system used in lieu of perforated piping. Installation of VaporVent increases construction productivity as
it eliminates time consuming trench digging and costly gravel importation. VaporVent is offered
with two different core materials, VaporVent-PS is recommended for sites with inert methane gas and VaporVent-HD is recommended for sites with aggressive chlorinated volatile organic or
petroleum vapors.

VENT PROPERTIES TEST METHOD VaporVent-PS VaporVent-HD

Material Polystyrene HDPE
Comprehensive Strength ASTM D-1621 9,000 lbs / ft2 9,200 lbs / ft2
Shear Strength ASTM D-1621 9,500 lbs / ft2 N/A
Peel Strength ASTM D-1876 38 lbs / ft 35 lbs / ft
Fungus Resistance (core) ASTM G-21 No Growth No Growth
In-plane flow (Hydraulic gradient-0.1, loading-10 psi) ASTM D-4716 21 gpm / ft of width 21 gpm / ft of width
Unobstructed inflow area Pavement side 85% 85%
Chemical Resistance N/A Excellent

FABRIC PROPERTIES TEST METHOD VaporVent-PS VaporVent-HD

Weight ASTM D-3776 4.0 oz. 4.5 oz.
Grab Tensile Strength ASTM D-4632 115 lbs. 120 lbs.
Puncture Strength ASTM D-3787 70 psi 65 psi
Trapezoidal Tear ASTM D-4533 50 lbs. 30 lbs.
Mullen Burst Strength ASTM D-3786 240 psi 50 psi
Elongation ASTM D-4632 50% 50%
EOS (AOS) ASTM D-4751 80 70
Permeability ASTM D-4491 20 cm/sec 21 cm / sec
Flow Rate ASTM D-4491 170 gpm / ft2 135 gpm / ft2
UV Stability (500 hours) ASTM D-4355 85% Retained 70% Retained
Fungus Resistance ASTM D-G21 No Growth No Growth

DIMENSIONAL DATA
Thickness 1”
Standard Widths 12”
Roll Length 150 ft
Roll Diameter 7 ft
Roll Weight 60 lbs

Land Science Technologies, Inc. / 1011 Calle Sombra / Suite 110 / San Clemente / CA / 92673 Ph. 949-366-8000 / F. 949- 366-8090
www.landsciencetech.com
Product Data
Sheet

Geo-Seal® DRAIN 6000 & 6200

Geo-Seal® DRAIN is a high performance drainage composite used to control water flow around
building foundations as well as provide protection to the Geo-Seal CORE. The channeled drain board is covered by a non-woven geotextile fabric that eliminates the threat of other materials
infiltrating and disrupting the flow of water. The 6200 has a plastic film covering the dimpled
surface and should be used when placed directly against the Geo-Seal CORE layer. The 6000 can be used when a layer such an additional layer, such as the Geo-Seal BASE, is between the
drainage composite and the Geo-Seal CORE.

PROPERTIES TEST METHOD 6000 6200

Core Polypropylene Polypropylene
Color Black Black
Weight ASTM D-3776 2.82 oz/ft2 2.82 oz/ft2
Compressive Strength ASTM D-1621 17,000 psf 17,000 psf
Thickness ASTM D-1777 0.40 in. 0.40 in.

FILTER FABRIC TEST METHOD 6000 6200

Grab Tensile ASTM D-4632 160 lbs. 160 lbs.
Elongation ASTM D-4632 50% 50%
Trapezoidal Tear ASTM D-4533 65 lbs. 65 lbs.
Puncture Strength ASTM D-3833 90 lbs. 90 lbs.
Apparent Operating Size ASTM D-4751 80 sieve size 80 sieve size
Mullen Burst ASTM D-4751 315 psi 315 psi
Permittivity ASTM D-4491 1.60 sec 1.60 sec
Water Flow Rate ASTM D-4491 110 gpm/ft2 110 gpm/ft2
Weight Typical ASTM D-5261 6.0 oz/yd2 6.0 oz/yd2
UV Resistance ASTM D-4355 70% (500 hrs.) 70% (500 hrs.)
Material PP PP

COMPOSITE SYSTEM TEST METHOD 6000 6200

Water Flow Rate (V) ASTM D-4716 17 gal/min/ft 17 gal/min/ft
Water Flow Rate (H) ASTM D-4716 2.8 gal/min/ft 2.8 gal/min/ft
Roll Size ASTM D-4716 6.0 ft x 50 ft 6.0 ft x 50 ft
Roll Weight ASTM D-4716 65 lbs 65 lbs

Land Science Technologies, Inc. / 1011 Calle Sombra / Suite 110 / San Clemente / CA / 92673
Ph. 949-366-8000 / F. 949- 366-8090
www.landsciencetech.com
Product Data
Sheet
09/08 GEOSEAL CORE MATERIAL SAFETY DATA SHEET
LAND SCIENCE TECHNOLOGIES Phone: [phone]
1011 Calle Sombra, Ste., 110 San Clemente, CA 92673
1. PRODUCT IDENTIFICATION
Trade Names: Geo-Seal CORE, Geo-Seal CORE Detail
Chemical Name: Asphalt Emulsion Synonyms: N/A
Hazardous Ingredients/OSHA: CHEMICAL FAMILIES: A. Bitumen/Asphalt
B. Synthetic rubber
C. Fatty acids D. Polymers
Hazard: No evidence of serious health hazards exists.
Carcinogenic ingredients/OSHA/NTP: Bitumen IARC: None
Ingredient Percentage C. A. S. #
Asphalt 50-60% 8052-42-4
Water 20-40% 7732-18-5
Latex: 9003-55-8 Styrene Latex 0-15% 100-42-5
Butadiene Latex 0-15% 106-99-0
Sodium Hydroxide .1-1% 1310-73-2 Amino Ethanol .01-.1% 34375-28-5
2. WARNING STATEMENTS Avoid prolonged or frequent skin contact, as the presence of emulsifying and de-emulsifying agents during
application may irritate the skin. 3. PHYSICAL AND CHEMICAL DATA Appearance: Brown to black
Specific Gravity: (H2O = 1): 1.028 (S) 1.034 (R) 1.13 (T) Solubility in Water: Insoluble
Percent Volatiles: None
Boiling Point: N/A Vapor Pressure (mm Hg): N/A
Vapor Density (Air = 1): N/A
Evaporation Rate: N\A
4. FIRE PROTECTION Bitumen emulsions are water based products and as such will not burn. In cases of fire in the
vicinity of drums, cool with water. 5. REACTIVITY DATA
Contact with strong oxidizing agents may create geling and water condensation.
6. HEALTH HAZARD DATA Exposure Limits: Avoid prolonged or frequent skin contact.
7. PHYSIOLOGICAL EFFECTS SUMMARY Acute: Skin irritation and rash
Chronic: Dermatitis
8. PRECAUTIONS FOR SAFE HANDLING Avoid contact with eyes.
Avoid inhalation.
Avoid prolonged or frequent skin contact. Avoid ingestion.
9. PROTECTION AND CONTROL MEASURES Protective Equipment: Use of clothing, gloves, and/or barrier cream is recommended for skin
protection. Respiratory Protection: Inhalation should be avoided, but is not considered to be hazardous.
Ventilation: Use local exhaust ventilation when applying in an enclosed area.
10. EMERGENCY AND FIRST AID PROCEDURES
For ingestion: DO NOT induce vomiting. Keep at rest and get prompt medical attention. For eye contamination: Irrigate eyes with water.
For skin contact: Wash affected areas of the body with proprietary hand cleaner, then wash with
soap and water.
Contact physician as needed for any of the above occurrences.
11. SPILL AND DISPOSAL PROCEDURES
Contain spillages with sand or earth and remove by normal methods. Dispose of according to State and Local regulations. If the Bitumen enters a water course or sewer, advise respective
water authority. The non-cured and cured material is non-toxic and non-flammable and can be
disposed of in land fill sites.
Other Precautions: For Additional Information Contact:
Land Science Technologies
1011 Calle Sombra, Ste., 110
San Clemente, CA 92673 [phone]

Information presented herein has been compiled from sources considered to be dependable and is accurate and reliable to the best of our knowledge and belief but is not guaranteed to be so. Nothing herein is to be construed as
recommending any practice or any product in violation of any patent or in violation of law or regulation. It is the users responsibility to determine for himself the suitability of any material for a specific purpose and to adopt such
safety precautions as may be necessary. We make no warranty as to the results to be obtained in using any material and, since conditions of use are not under our control, we must necessarily disclaim all liability with respect
to the use of any material supplied by us.

8/03
Geo-Seal BASE and BOND: Material Safety Data Sheet

Land Science Technologies PHONE: [phone] Calle Sombra
San Clemente, CA 92673
1. PRODUCT IDENTIFICATION
Trade Name: Geo-Seal BASE, Geo-Seal BOND Chemical Name: POLYMERIC COMPONENTS, GEOTEXTILE FABRIC Synonyms: N/A
Hazardous Ingredients/OSHA: NO HAZARDOUS INGREDIENTS THIS PRODUCT IS SUPPLIED IN COMPLIANCE WITH THE TSCA REPORTING REUQIREMENTS. Carcinogenic Ingredients/OSHA/NTP: NONE
IARC: NONE Transportation information: CONTAINS NO HAZARDOUS INGREDIENTS Transportation emergency: Land Science Technologies, 949-366-8000
2. PHYSICAL AND CHEMICAL DATA
Appearance and Odor: White Solid Sheet, Odorless Solubility in Water: Negligible, below 0.1%
Specific Gravity (Water = 1): 0.90 Percent Volatiles: None Vapor Pressure (mm Hg): Not Determined Boiling Point: Degrees: Not Determined Vapor Density (Air = 1): Not Determined Melting Point: 320° F Evaporation Rate: (Butyl Acetate - 1): N/A Auto Ignition Temperature: Not Determined

3. FIRE AND EXPLOSION DATA
Flash Point: N/A Flammable limits %: Lower N/A Upper N/A Extinguishing Media: Agents approved for Class A hazards (e.g. foam, steam) or water fog. Special Fire Fighting Procedures: Firefighters should wear full bunker gear, including a positive pressure self-contained breathing
apparatus. Unusual Fire and Explosion Hazards: None identified.
4. REACTIVITY DATA
Stability: Stable Conditions to avoid: Keep away from ignition sources (e.g. heat, sparks and open flames). Incompatibility (materials to avoid): None Identified
Hazardous Decomposition or Byproducts: Incomplete burning can produce carbon monoxide and/or carbon dioxide and other harmful products. Hazardous Polymerization: Will not occur
5. HEALTH HAZARD DATA
Route(s) of Entry: Inhalation: No Skin: No Ingestion: No
Health Hazards (Acute & Coronic): Will not present any health hazards under normal processing conditions. Eye & Skin Contact: None Identified. Skin Absorption: Non-toxic. Inhalation: No significant irritation expected. Ingestion: No significant health hazards identified.
Carcinogenicity: Unrelated NTP: No IARC: No OSHA Regulated: No
6. PROTECTION AND CONTROL MEASURES
Precautions to be taken in handling and storing: Store away from heat, ignition sources and open flame in accordance with applicable regulations. Respiratory Protection: Not required under normal process conditions. Ventilation: Local Exhaust
Protective Gloves: Not required. Eye Protection: Not required. Other Protective clothing or equipment: Not required. Work/Hygienic Practices: Wash hands after handling and before eating.

7. EMERGENCY AND FIRST AID PROCEDURES
In Case of Combustion (550°)” Eye Contamination: Flush with large amounts of water for 20 minutes lifting upper and lower lids occasionally. Get medical attention. Skin contact: Thoroughly wash exposed area with soap and water. Remove contaminated clothing. Launder contaminated clothing before reuse.
Inhalation: If overexposure occurs, remove individual to fresh air. If breathing stops, administer artificial respiration. Get medical attention. Ingestion: If a large amount of material is swallowed DO NOT INDUCE VOMITING. If vomiting begins lower victim's head in an effort to prevent vomit from entering lungs and get medical attention.

8. SPILL AND DISPOSAL PROCEDURES
Spill is not applicable. Material is normally in solid form. Land Science Technologies 949-366-8000
1011 Calle Sombra San Clemente, CA 92673
Information presented herein has been compiled from sources considered to be dependable and is accurate and reliable to the best of our knowledge and belief but is not guaranteed to be so. Nothing herein is to be construed as recommending any practice or any product in
violation of any patent or in violation of law or regulation. It is the users responsibility to determine for himself the suitability of any material for a specific purpose and to adopt such safety precautions as may be necessary. We make no warranty as to the results to be obtained in using any material and, since conditions of use are not under our control, we must necessarily disclaim all liability with respect to the use of any material supplied by us.

© 2012 Land Science Technologies www.landsciencetech.com [phone]. 4/12

Chemical Resistance

Vapor Intrusion Coating System for Existing Structures
Product Description
The Retro-Coat™ (patent pending) Vapor Intrusion
Coating System is a complete product line that consists of
chemically resistant materials to properly protect existing
structures from the threat of contaminant vapor intrusion
without the need for additional concrete protection.
Developed by the R&D team of Land Science
Technologies™, the Retro-Coat system has been subjected
to rigorous testing procedures to prove its ability to combat
the most aggressive chemical vapors. The main component
of the Retro-Coat system is the Retro-Coat coating which is
a two part, odorless, no VOC, 100% solids coating.

Retro-Coat finishes to a high gloss, easy-to-clean surface
that is impervious to vapor and moisture transmission.
Available in a variety of colors, Retro-Coat can be applied
on damp as well as dry concrete, concrete masonry units,
tile, brick and metal. For enhanced slip resistance, a
suitable aggregate can be added. In addition, other
additives or materials can be utilized to achieve a desired
performance or aesthetic look.

Typical Application
Retro-Coat is suitable as a barrier to block contaminated
vapors from entering existing structures. Particular uses
include coating the horizontal surfaces of existing structures
where contamination under, or adjacent to, a structure can
potentially migrate inside the structure and create a vapor
encroachment condition. This condition is most commonly
found when the existing structure was operated as a dry
cleaner, gas station, manufacturing facility or located in
close proximity to any structure where carcinogenic
chemicals were utilized.
A typical application consists of a minimum 20 mil thick
system; consisting of two 10 mil coats of Retro-Coat at 160
SF/gallon per coat and is recommended along with a 6 mil
coat of Retro-Coat PRIMER. The typical 20 mil application
can withstand forklift traffic, other machinery and even act
as secondary containment. However, if Retro-Coat may be
exposed to more harsh conditions over a longer period of
time, thicker applications ranging from 60 mil to ¼ -inch may
be more suitable.
In either application, Retro-Coat is a traffic bearing surface
and does not need a protective course placed over it.

Retro-Coat Advantages

• Our R&D team developed all of the
Retro-Coat system components
specifically for vapor intrusion
protection in existing structures

• Retro-Coat is resistant to both TCE and
PCE, the vast majority of coatings
cringe at such aggressive chemicals

• Retro-Coat is a wearing surface,
meaning no additional concrete
protection is necessary

• No odor and fast cure time reduce
building downtime

• Carpet, tile, linoleum or other floor
coverings can be applied directly over
Retro-Coat, if desired

• Eliminates the need to remove the
existing slab and when combined with
in-situ treatment, lowers overall
remediation cost

• Retro-Coat can increase the
performance of an existing active sub-
slab depressurization system

• Retro-Coat can aid in the retiring of
existing active systems

• Available and installed by Land
Science Technologies certified
contractors

© 2012 Land Science Technologies www.landsciencetech.com [phone]. 4/12

Installation
Particular care must be taken to follow those instructions precisely to assure proper installation. These instructions
pertain to a standard 20 mil application; please contact us if the desired application is different.

1. New concrete should be allowed to cure a minimum of 28 days and/or be checked with a rubber mat or plastic sheet to
ensure adequate curing time has occurred.
2. All surfaces to be covered should be power washed, shot blasted, acid etched, scarified or sanded to present a clean,
sound substrate to which to bond to. The prepared surface should have a ph of 7.
3. Any bugholes and cracks wider than 1/8” should be filled with Retro-Coat PREP and allowed to dry before coating. More
severely damaged concrete or other special conditions will require the proper Retro-Coat product.
4. When installing the standard 20 mil application of Retro-Coat, apply a 6 mil coat of Retro-Coat PRIMER and
allow to dry prior to applying the initial coat of Retro-Coat. Priming may not be necessary when Retro-Coat
is applied to a thickness greater than 20 mils. On new concrete or old concrete with an open porosity and on
wood surfaces apply Retro-Coat PRIMER and allow to dry.
5. The two Retro-Coat ingredients should be mixed in the prescribed ratios, using a low speed “jiffy-style” mixer,
(maximum 750 rpm). Mix Part A for about 1 minute then, add Part B and mix until uniform in color and consistency (at
least one additional minute.)
6. Do not mix less than the prescribed amount of any ingredient or add any solvent to the mix.
7. Apply the mixed Retro-Coat material with a short nap roller, a squeegee or a brush. Apply
approximately 160 SF per gallon per coat to achieve 10 mils of coating.
8. Apply a second coat while the first coat is still tacky if using spike shoes or dry enough to walk on, but before 7
hours at 75oF. If the first coat has set and is no longer tacky then the first coat should be sanded before
recoating.
9. A suitable aggregate may be broadcast onto the surface after backrolling to provide more anti-slip profile to the finished
surface. It is advisable to test various types and sizes of aggregate to achieve the desired finished profile.

Product Specification
The specified area shall receive an application of Retro-Coat as manufactured by Land Science Technologies, San
Clemente, California. The material shall be installed by precisely following the manufacturer’s published
recommendations pertaining to surface preparation, mixing and application. The material shall be a low odor, two
part, solvent free 100% solids, high gloss flexibilized system with good resilience to resist thermal and
mechanical shock. It should be able to be roller applied at a minimum of 10 mils thickness per coat on vertical
surfaces without sagging (at ambient conditions). The system must adhere to damp as well as dry concrete, wood,
metal tile, terrazzo and sound existing epoxy and urethane coatings. It shall have tensile elongation of at least 6.0%
when tested under ASTM-638. Its bond strength to quarry tile shall exceed 1000 psi when tested with an
Elcometer pull test. Its hardness shall not exceed 83, as measured on the Shore D scale. The system shall be
unaffected by oils and greases and shall withstand chemical attack for at least 72 hours against 98% sulfuric,
50% hydrofluoric acid, glacial acetic acid and acrylonitrile.

Application of Retro-Coat SEALANT to
a 20 mil total thickness
Completed surface preparation consisting of shot blasting,
Retro-Coat PREP to fill joints and cracks and a 6 mil
application of Retro-Coat PRIMER
© 2012 Land Science Technologies www.landsciencetech.com [phone]. 4/12

Precautions
1. This is a fast reacting product; immediately pour onto floor after mixing and spread with notched
squeegee. Recoat window without sanding at 70oF: 8 hours
2. A severe skin and eye irritant; check MSDS before use
3. Do not apply below 50oF
Note: Failure to follow the above instruction, unless expressly authorized by a Land Science Technologies
Representative, will void our material warranty.

Chemical Resistance
Retro-Coat™ is considered chemically resistant to neat concentrated acids, caustics and solvents. For permeation or
diffusion coefficients please contact Land Science Technologies.

Physical Properties
Tensile Strength (ASTM D-638) : 9800 psi Bond Strength to Quarry Tile : >1000 psi
Tensile Elongation (D-638) : 6.0% Vapor Transmission Rate (E-96) : .027 perms
Flexural Strength (D-790) : 7035 psi Water Absorption (D-570) : 0.2% in 24hrs.
Hardness, Shore D (D-2240) : 83 Taber Abrasion (D-1044) : 86 mg loss.
Gardner Impact Strength (D-2794) : 80 in. lbs. 60o Gloss : 100

Physical Characteristics
Density, lbs/gal. Mixing Ratios By Volume By Weight
Pt. A : 11.0 Pt. A : Pt. B 2:1 2.3:1
Pt. B : 8.9
A&B Mixed : 9.3 Curing Times @ 50o F 77oF 90oF
Viscosity @ 77oF, cps Pot Life 35 min. 30 min. 20 min.
Pt. A : 18,400 Working Times 20 min. 20 min. 15 min.
Pt. B : 500 Hard, Foot Traffic 14 hrs. 7 hrs. 3 ½ hrs.
A&B Mixed : 4800 Maximum hardness and chemical resistance are achieved after 7 days at 77oF

Color Availability Packaging and Coverage Rates (for 20 mil coverage)
Standard colors: beige, black, blue, dark gray, 4 Gallon Kit : 320 SF
green, gray, red, white, yellow 20 Gallon Kit : 1600 SF
Shelf Life: 1 Year at 77oF in unopened containers 100 Gallon Kit : 8,000 SF

The data, statements and recommendations set forth in this product information sheet are based on testing, research and other development work which has been carefully
conducted by Land Science Technologies, and we believe such data, statements and recommendations will serve as reliable guidelines. However, this product is subject to
numerable uses under varying conditions over which we have no control, and accordingly, we do NOT warrant that this product is suitable for any particular use. Users are
advised to test the product in advance to make certain it is suitable for their particular production conditions and particular use or uses.

WARRANTY – All products manufactured by us are warranted to be first class material and free from defects in material and workmanship.

Liability under this warranty is limited to the net purchase price of any such products proven defective or, at our option, to the repair or replacement of said products upon their
return to us transportation prepaid. All claims hereunder on defective products must be made in writing within 30 days after the receipt of such products in your plant and prior
to further processing or combining with other materials and products. WE MAKE NO WARRANTY, EXPRESS OR IMPLIED, AS TO THE SUITABILITY OF ANY OF OUR
PRODUCTS FOR ANY PARTICULAR USE, AND WE SHALL NOT BE SUBJECT TO LIABILITY FROM ANY DAMAGES RESULTING FROM THEIR USE IN OPERATIONS
NOT UNDER OUR DIRECT CONTROL.

THIS WARRANTY IS EXCLUSIVE OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, AND NO REPRESENTATIVE OF OURS OR ANY OTHER PERSON IS
AUTHORIZED TO ASSUME FOR US ANY OTHER LIABILITY IN CONNECTION WITH THE SALE OF OUR PRODUCTS.

SPECIFICATIONS & DIMENSIONS OF THE AV-3-PVC
Net Free Vent Area:
Sq. In.: 12 Sq. Ft.: .09
The Aura Vent with a specially designed PVC pipe adapter
The Aura Ventilator acts as a rain/snow cap
The Aura’s design draws air from the pipe
Used to exhaust gases such as Methane/Gasoline
Use for radon exhaust systems as a cap to protect the in-line fan from moisture damage
Aura design reduces back pressure to fan and optimizes fan cfm
AV-3-PVC Aura Pipe Cap
CFM Performance Testing
using wind only
4 mph 26
5.2 mph 38
7.4 mph 51
9.8 mph 59
11 mph 62
7"
7 3 4 "
4"
3 12 "

2. Component Specifications

02 56 19.13-1

Geo-Seal® Vapor Intrusion Barrier
02 56 19.13 Fluid-Applied Gas Barrier Version 1.30

Note: If membrane will be subjected to hydrostatic pressure, please contact Land Science Technologies™ for proper recommendations. PART 1 – GENERAL
1.1 RELATED DOCUMENTS A. Drawings and general provisions of the contract, including general and supplementary conditions and Division 1 specification sections, apply to this section.
1.2 SUMMARY A. This section includes the following:
1. Substrate preparation: 2. Vapor intrusion barrier components: 3. Seam sealer and accessories. B. Related Sections: The following sections contain requirements that relate to this section:
1. Division 2 Section “Earthwork”, “Pipe Materials”, “Sub-drainage Systems”, “Gas Collection Systems”: 2. Division 3 Section “Cast-in-Place Concrete” for concrete placement, curing, and finishing: 3. Division 5 Section “Expansion Joint Cover Assemblies”, for expansion-joint covers assemblies and installation.
1.3 PERFORMANCE REQUIREMENTS A. General: Provide a vapor intrusion barrier system that prevents the passage of methane gas and/or volatile organic compound vapors and complies with physical requirements as demonstrated by testing performed by an independent testing agency of
manufacturer’s current vapor intrusion barrier formulations and system design.
1.4 SUBMITTALS A. Submit product data for each type of vapor intrusion barrier, including manufacturer’s printed instructions for evaluating and preparing the substrate, technical data, and tested physical and performance properties.
B. Project Data - Submit shop drawings showing extent of vapor intrusion barrier, including details for overlaps, flashing, penetrations, and other termination conditions. C. Samples – Submit representative samples of the following for approval:
1. Vapor intrusion barrier components. D. Certified Installer Certificates – Submit certificates signed by manufacturer certifying that installers comply with requirements
under the “Quality Assurance” article.
1.5 QUALITY ASSURANCE A. Installer Qualifications: Engage an experienced installer who has been trained and certified in writing by the membrane manufacturer, Land Science Technologies™ for the installation of the Geo-Seal® System.
B. Manufacturer Qualification: Obtain vapor intrusion barrier materials and system components from a single manufacturer source Land Science Technologies. C. Field Sample: Apply vapor intrusion barrier system field sample to 100 ft2 (9.3 m2) of field area demonstrate application,
detailing, thickness, texture, and standard of workmanship. 1. Notify engineer or special inspector one week in advance of the dates and times when field sample will be prepared. 2. If engineer or special inspector determines that field sample, does not meet requirements, reapply field sample until
field sample is approved. 3. Retain and maintain approved field sample during construction in an undisturbed condition as a standard for judging the completed methane and vapor intrusion barrier. An undamaged field sample may become part of the completed work.
D. Pre-installation Conference: A pre-installation conference shall be held prior to application of the vapor intrusion barrier system to assure proper site and installation conditions, to include contractor, applicator, architect/engineer, other trades influenced by vapor intrusion barrier installation and special inspector (if any).
02 56 19.13-2

1.6 DELIVERY, STORAGE, AND HANDLING
A. Deliver materials to project site as specified by manufacturer labeled with manufacturer’s name, product brand name and type, date of manufacture, shelf life, and directions for storing and mixing with other components. B. Store materials as specified by the manufacturer in a clean, dry, protected location and within the temperature range required
by manufacturer. Protect stored materials from direct sunlight. If freezing temperatures are expected, necessary steps should be taken to prevent the freezing of the Geo-Seal CORE and Geo-Seal CORE Detail components. C. Remove and replace material that cannot be applied within its stated shelf life.
1.7 PROJECT CONDITIONS A. Protect all adjacent areas not to be installed on. Where necessary, apply masking to prevent staining of surfaces to remain exposed wherever membrane abuts to other finish surfaces.
B. Perform work only when existing and forecasted weather conditions are within manufacturer’s recommendations for the material and application method used. C. Minimum clearance of 24 inches is required for application of product. For areas with less than 24-inch clearance, the membrane may be applied by hand using Geo-Seal CORE Detail.
D. Ambient temperature shall be within manufacturer’s specifications. (Greater than +45ºF/+7ºC.) Consult manufacturer for the proper requirements when desiring to apply Geo-Seal CORE below 45ºF/7ºC. E. All plumbing, electrical, mechanical and structural items to be under or passing through the vapor intrusion barrier system
shall be positively secured in their proper positions and appropriately protected prior to membrane application. F. Vapor intrusion barrier shall be installed before placement of fill material and reinforcing steel. When not possible, all exposed reinforcing steel shall be masked by general contractor prior to membrane application.
G. Stakes used to secure the concrete forms shall not penetrate the vapor intrusion barrier system after it has been installed. If stakes need to puncture the vapor intrusion barrier system after it has been installed, the necessary repairs need to be made by a certified Geo-Seal applicator. To confirm the staking procedure is in agreement with the manufactures recommendation, contact Land Science Technologies.
1.8 WARRANTY A. General Warranty: The special warranty specified in this article shall not deprive the owner of other rights the owner may have under other provisions of the contract documents, and shall be in addition to, and run concurrent with, other warranties made by the contractor under requirements of the contract documents.
B. Special Warranty: Submit a written warranty signed by vapor intrusion barrier manufacturer agreeing to repair or replace vapor intrusion barrier that does not meet requirements or that does not remain methane gas and/or volatile organic compound vapor tight within the specified warranty period. Warranty does not include failure of vapor intrusion barrier due to failure of substrate prepared and treated according to requirements or formation of new joints and cracks in the attached to
structures that exceed 1/16 inch (1.58 mm) in width. 1. Warranty Period: 1 year after date of substantial completion. Longer warranty periods are available upon request to the manufacturer.
C. Labor and material warranties are available upon request to the manufacturer. PART 2 – PRODUCTS 2.1 MANUFACTURERS
A. Geo-Seal; Land Science Technologies™, San Clemente, CA. [phone] 1. Geo-Seal BASE sheet layer 2. Geo-Seal CORE spray layer and Geo-Seal CORE Detail
3. Geo-Seal BOND protection layer 2.2 VAPOR INTRUSION BARRIER SPRAY MATERIALS A. Fluid applied vapor intrusion barrier system – Geo-Seal CORE; a single course, high build, polymer modified, asphalt
emulsion. Waterborne and spray applied at ambient temperatures. A nominal thickness of 60 dry mils, unless specified otherwise. Non-toxic and odorless. Geo-Seal CORE Detail has similar properties with greater viscosity and is roller or brush applied. Manufactured by Land Science Technologies.

02 56 19.13-3

B. Fluid applied vapor intrusion barrier physical properties.
Geo-Seal CORE – TYPICAL CURED PROPERTIES

Geo-Seal CORE Detail – TYPICAL CURED PROPERTIES
2.3 VAPOR INTRUSION BARRIER SHEET MATERIALS
A. The Geo-Seal BASE layer and Geo-Seal BOND layer are chemically resistant sheets comprised of a 5 mil high density polyethylene sheet thermally bonded to a 3 ounce non woven geotextile. B. Sheet Course Usage
1. As foundation base layer, use Geo-Seal BASE course and/or other base sheet as required or approved by the manufacturer. 2. As top protective layer, use Geo-Seal BOND layer and/or other protection as required or approved by the manufacturer.
Properties Test Method Results
Tensile Strength - CORE only ASTM 412 32 psi
Tensile Strength - Geo-Seal System ASTM 412 662 psi
Elongation ASTM 412 4140%
Resistance to Decay ASTM E 154 Section 13 4% Perm Loss
Accelerated Aging ASTM G 23 No Effect
Moisture Vapor Transmission ASTM E 96 .026 g/ft2/hr
Hydrostatic Water Pressure ASTM D 751 26 psi
Perm rating ASTM E 96 (US Perms)0.21
Methane transmission rate ASTM D 1434 Passed
Adhesion to Concrete & Masonry ASTM C 836 & ASTM C 704 11 lbf./inch
Hardness ASTM C 836 80
Crack Bridging ASTM C 836 No Cracking
Heat Aging ASTM D 4068 Passed
Environmental Stress Cracking ASTM D 1693 Passed
Oil Resistance ASTM D543 Passed
Soil Burial ASTM D 4068 Passed
Low Temp. Flexibility ASTM C 836-00 No Cracking at –20°C
Acetic 30%
Sulfuric and Hydrochloric 13%
Stable 248°F
Flexible 13°F
Resistance to Acids:
Temperature Effect:
Properties Test Method Results
Tensile Strength ASTM 412 32 psi
Elongation ASTM 412 3860%
Resistance to Decay ASTM E 154 Section 13 9% Perm Loss
Accelerated Aging ASTM G 23 No Effect
Moisture Vapor Transmission ASTM E 96 .026 g/ft2/hr
Hydrostatic Water Pressure ASTM D 751 28 psi
Perm rating (US Perms)ASTM E 96 0.17
Methane transmission rate ASTM D 1434 Passed
Adhesion to Concrete & Masonry ASTM C 836 7 lbf./inch
Hardness ASTM C 836 85
Crack Bridging ASTM C 836 No Cracking
Low Temp. Flexibility ASTM C 836-00 No Cracking at –20ºC
Acetic 30%
Sulfuric and Hydrochloric 13%
Stable 248°F
Flexible 13°F
Resistance to Acids:
Temperature Effect:
02 56 19.13-4

C. Geo-Seal BOND and Geo-Seal BASE physical properties.
2.4 AXILLARY MATERIALS
A. Sheet Flashing: 60-mil reinforced modified asphalt sheet good with double-sided adhesive. B. Reinforcing Strip: Manufacturer’s recommended polypropylene and polyester fabric.
C. Gas Venting Materials: Geo-Seal Vapor-Vent HD or Geo-Seal Vapor-Vent Poly, and associated fittings. D. Seam Detailing Sealant Mastic: Geo-Seal CORE Detail, a high or medium viscosity polymer modified water based asphalt material.
1. Back Rod: Closed-cell polyethylene foam. PART 3 – EXECUTION 3.1 AUXILIARY MATERIALS
A. Examine substrates, areas, and conditions under which vapor intrusion barrier will be applied, with installer present, for compliance with requirements. Do not proceed with installation until unsatisfactory conditions have been corrected. 3.2 SUBGRADE SURFACE PREPARATION
A. Verify substrate is prepared according to manufacturer’s recommendations. On a horizontal surface, the substrate should be free from material that can potentially puncture the vapor intrusion barrier. Additional protection or cushion layers might be required if the earth or gravel substrate contains too many jagged points and edges that could puncture one or more of the system components. Contact manufacturer to confirm substrate is within manufactures recommendations.
B. Geo-Seal can accommodate a wide range of substrates, including but not limited to compacted earth, sand, aggregate, and mudslabs. 1. Compacted Earth: Remove pieces of debris, gravel and/or any other material that can potentially puncture the Geo-
Seal BASE. Remove any debris from substrate that can potentially puncture the Geo-Seal system prior to application. 2. Sand: A sand subgrade requires no additional preparation, provided any material that can potentially puncture the Geo-Seal BASE layer is not present.
3. Aggregate: Contact the manufacturer to ensure the aggregate layer will not be detrimental to the membrane. The gravel layer must be compacted and rolled flat. Ideally a ¾” minus gravel layer with rounded edges should be specified; however the Geo-Seal system can accommodate a wide variety of different substrates. Contact Land Science Technologies if there are questions regarding the compatibility of Geo-Seal and the utilized substrate. Exercise caution when specifying pea gravel under the membrane, if not compacted properly, pea gravel can become an
unstable substrate. 4. Mudslabs: The use of a mubslab under the Geo-Seal system is acceptable, contact Land Science Technologies for job specific requirements.
C. Mask off adjoining surface not receiving the vapor intrusion barrier system to prevent the spillage or over spray affecting other construction. D. Earth, sand or gravel subgrades should be prepared and compacted to local building code requirements.
3.3 CONCRETE SURFACE PREPARATION
A. Clean and prepare concrete surface to manufacturer’s recommendations. In general, only apply the Geo-Seal CORE material to dry, clean and uniform substrates. Concrete surfaces must be a light trowel, light broom or equivalent finish. Remove fins, ridges and other projections and fill honeycomb, aggregate pockets, grout joints and tie holes, and other voids with hydraulic
Properties Test Method Results
Film Thickness 5 mil
Composite Thickness 18 mil
Water Vapor Permeability ASTM E 96 0.214
Adhesion to Concrete ASTM D 1970 9.2 lbs/inch2
Dart Impact ASTM D 1790 >1070 gms, method A
594 gms, method B
Puncture Properties Tear ASTM B 2582 MD 11,290 gms
ASTM B 2582 TD 13,150 gms
02 56 19.13-5

cement or rapid-set grout. It is the applicator’s responsibility to point out unacceptable substrate conditions to the general contractor and ensure the proper repairs are made.
B. When applying the Geo-Seal CORE or Geo-Seal CORE Detail material to concrete it is important to not apply the product over standing water. Applying over standing water will result in the membrane not setting up properly on the substrate C. Surfaces may need to be wiped down or cleaned prior to application. This includes, but is not limited to, the removal of forming
oils, concrete curing agents, dirt accumulation, and other debris. Contact form release agent manufacturer or concrete curing agent manufacturer for VOC content and proper methods for removing the respective agent. D. Applying the Geo-Seal CORE to “green” concrete is acceptable and can be advantageous in creating a superior bond to the
concrete surface. To help reduce blistering, apply a primer coat of only the asphalt component of the Geo-Seal CORE system. Some blistering of the membrane will occur and may be more severe on walls exposed to direct sunlight. Blistering is normal and will subside over time. Using a needle nose depth gauge confirm that the specified mil thickness has been applied. 3.4 PREPARATIONS AND TREATMENT OF TERMINATIONS
A. Prepare the substrate surface in accordance with Section 3.3 of this document. Concrete surfaces that are not a light trowel, light broom or equivalent finish, will need to be repaired. B. Terminations on horizontal and vertical surfaces should extend 6” onto the termination surface. Job specific conditions may prevent
a 6” termination. In these conditions, contact manufacturer for recommendations.
C. Apply 30 mils of Geo-Seal CORE to the terminating surface and then embed the Geo-Seal BASE layer by pressing it firmly into the Geo-Seal CORE layer. Next, apply 60 mils of Geo-Seal CORE to the BASE layer. When complete, apply the Geo-Seal BOND layer. After the placement of the Geo-Seal BOND layer is complete, apply a final 30 mil seal of the Geo-Seal CORE layer over the edge of the termination. For further clarification, refer to the termination detail provided by manufacturer.
D. The stated termination process is appropriate for terminating the membrane onto exterior footings, pile caps, interior footings and grade beams. When terminating the membrane to stem walls or vertical surfaces the same process should be used. 3.5 PREPARATIONS AND TREATMENT OF PENETRATIONS
A. All pipe penetrations should be securely in place prior to the installation of the Geo-Seal system. Any loose penetrations should be secured prior to Geo-Seal application, as loose penetrations could potentially exert pressure on the membrane and damage the membrane after installation.
B. To properly seal around penetrations, cut a piece of the Geo-Seal BASE layer that will extend 6” beyond the outside perimeter of the penetration. Cut a hole in the Geo-Seal BASE layer just big enough to slide over the penetration, ensuring the Geo-Seal BASE
layer fits snug against the penetration, this can be done by cutting an “X” no larger than the inside diameter of the penetration. There should not be a gap larger than a 1/8” between the Geo-Seal BASE layer and the penetration. Other methods can also be
utilized, provided, there is not a gap larger than 1/8” between the Geo-Seal BASE layer and the penetration.
C. Seal the Geo-Seal BASE layer using Geo-Seal CORE or Geo-Seal CORE Detail to the underlying Geo-Seal BASE layer. D. Apply one coat of Geo-Seal CORE Detail or Geo-Seal CORE spray to the Geo-Seal BASE layer and around the penetration at a thickness of 30 mils. Penetrations should be treated in a 6-inch radius around penetration and 3 inches onto penetrating
object. E. Embed a fabric reinforcing strip after the first application of the Geo-Seal CORE spray or Geo-Seal CORE Detail material and then apply a second 30 mil coat over the embedded joint reinforcing strip ensuring its complete saturation of the embedded strip and tight seal around the penetration.
F. After the placement of the Geo-Seal BOND layer, a cable tie should then be placed around the finished penetration. The cable tie should be snug, but not overly tight so as to slice into the finished seal. OPTION: A final application of Geo-Seal CORE may be used to provide a finishing seal after the Geo-Seal BOND layer has been
installed. NOTE: Metal or other slick penetration surfaces may require treatment in order to achieve proper adhesion. For plastic pipes, sand paper may be used to achieve a profile, an emery cloth is more appropriate for metal surfaces. An emery cloth should also be used to remove any rust on metal surfaces.
3.6 GEO-SEAL BASE LAYER INSTALLATION A. Install the Geo-Seal BASE layer over substrate material in one direction with six-inch overlaps and the geotextile (fabric side) facing down.
B. Secure the Geo-Seal BASE seams by applying 60 mils of Geo-Seal CORE between the 6” overlapped sheets with the geotextile side down. C. Visually verify there are no gaps/fish-mouths in seams.

02 56 19.13-6

D. For best results, install an equal amount of Geo-Seal BASE and Geo-Seal CORE in one day. Leaving unsprayed Geo-Seal BASE overnight might allow excess moisture to collect on the Geo-Seal BASE. If excess moisture collects, it needs to be
removed. NOTE: In windy conditions it might be necessary to encapsulate the seam by spraying the Geo-Seal CORE layer over the completed Geo-Seal BASE seam.
3.7 GEO-SEAL CORE APPLICATION A. Set up spray equipment according to manufacturer’s instructions.
B. Mix and prepare materials according to manufacturer’s instructions. C. The two catalyst nozzles (8001) should be adjusted to cross at about 18" from the end of the wand. This apex of catalyst and
emulsion spray should then be less than 24" but greater than 12” from the desired surface when spraying. When properly sprayed the fan pattern of the catalyst should range between 65° and 80°.
D. Adjust the amount of catalyst used based on the ambient air temperature and surface temperature of the substrate receiving the
membrane. In hot weather use less catalyst as hot conditions will quickly “break” the emulsion and facilitate the curing of the membrane. In cold conditions and on vertical surfaces use more catalyst to “break” the emulsion quicker to expedite curing and set up time in cold conditions.
E. To spray the Geo-Seal CORE layer, pull the trigger on the gun. A 42° fan pattern should form when properly sprayed. Apply one spray coat of Geo-Seal CORE to obtain a seamless membrane free from pinholes or shadows, with an average dry film thickness of 60 mils (1.52 mm). F. Apply the Geo-Seal CORE layer in a spray pattern that is perpendicular to the application surface. The concern when spraying at
an angle is that an area might be missed. Using a perpendicular spray pattern will limit voids and thin spots, and will also create a uniform and consistent membrane. G. Verify film thickness of vapor intrusion barrier every 500 ft2. (46.45 m2), for information regarding Geo-Seal quality control measures, refer to the quality control procedures in Section 3.9 of this specification.
H. The membrane will generally cure in 24 to 48 hours. As a rule, when temperature decreases or humidity increases, the curing of the membrane will be prolonged. The membrane does not need to be fully cured prior the placement of the Geo-Seal BOND layer, provided mil thickness has been verified and a smoke test will be conducted.
I. Do not penetrate membrane after it has been installed. If membrane is penetrated after the membrane is installed, it is the responsibility of the general contractor to notify the certified installer to make repairs. J. If applying to a vertical concrete wall, apply Geo-Seal CORE directly to concrete surface and use manufacturer’s recommended protection material based on site specific conditions. If applying Geo-Seal against shoring, contact
manufacturer for site specific installation instructions. NOTE: Care should be taken to not trap moisture between the layers of the membrane. Trapping moisture may occur from applying a second coat prior to the membrane curing. Repairs and detailing may be done over the Geo-Seal CORE layer when not fully cured.
3.8 GEO-SEAL BOND PROTECTION COURSE INSTALLATION A. Install Geo-Seal BOND protection course perpendicular to the direction of the Geo-Seal BASE course with overlapped seams over nominally cured membrane no later than recommended by manufacturer and before starting subsequent construction
operations. B. Sweep off any water that has collected on the surface of the Geo-Seal CORE layer, prior to the placement of the Geo-Seal BOND layer.
C. Overlap and seam the Geo-Seal BOND layer in the same manner as the Geo-Seal BASE layer. D. To expedite the construction process, the Geo-Seal BOND layer can be placed over the Geo-Seal CORE immediately after the spray application is complete, provided the Geo-Seal CORE mil thickness has been verified.
3.9 QUALITY ASSURANCE A. The Geo-Seal system must be installed by a trained and certified installer approved by Land Science Technologies. B. For projects that will require a material or labor material warranty, Land Science Technologies will require a manufacturer’s
representative or certified 3rd party inspector to inspect and verify that the membrane has been installed per the
manufacturer’s recommendations. The certified installer is responsible for contacting the inspector for inspection. Prior to application of the membrane, a notice period for inspection should be agreed upon between the applicator and inspector.

02 56 19.13-7

C. The measurement tools listed below will help verity the thickness of the Geo-Seal CORE layer. As measurement verification experience is gained, these tools will help confirm thickness measurements that can be obtained by pressing one’s fingers
into the Geo-Seal CORE membrane. To verify the mil thickness of the Geo-Seal CORE, the following measurement devices are required. 1. Mil reading caliper: Calipers are used to measure the thickness of coupon samples. To measure coupon samples
correctly, the thickness of the Geo-Seal sheet layers (18 mils each) must be taken into account. Mark sample area for repair. 2. Wet mil thickness gauge: A wet mil thickness gauge may be used to quickly measure the mil thickness of the Geo-
Seal CORE layer. The thickness of the Geo-Seal sheet layers do not factor into the mil thickness reading. NOTE: When first using a wet mil thickness gauge on a project, collect coupon samples to verify the wet mil gauge thickness readings. 3. Needle nose digital depth gauge: A needle nose depth gauge should be used when measuring the Geo-Seal CORE
thickness on vertical walls or in field measurements. Mark measurement area for repair. To obtain a proper wet mil thickness reading, take into account the 5 to 10 percent shrinkage that will occur as the membrane fully cures. Not taking into account the thickness of the sheet layers, a freshly sprayed membrane should have a minimum wet thickness of 63 (5%) to 66 (10%) mils.
Methods on how to properly conduct Geo-Seal CORE thickness sampling can be obtained by reviewing literature prepared by Land Science Technologies. D. It should be noted that taking too many destructive samples can be detrimental to the membrane. Areas where coupon
samples have been removed need to be marked for repair. E. Smoke Testing is highly recommended and is the ideal way to test the seal created around penetrations and terminations. Smoke Testing is conducted by pumping non-toxic smoke underneath the Geo-Seal vapor intrusion barrier and then repairing the areas where smoke appears. Refer to smoke testing protocol provided by Land Science Technologies. For projects that
will require a material or labor material warranty, Land Science Technologies will require a smoke test. F. Visual inspections prior to placement of concrete, but after the installation of concrete reinforcing, is recommended to identify any punctures that may have occurred during the installation of rebar, post tension cables, etc. Punctures in the Geo-Seal system should be easy to indentify due to the color contrasting layers of the system.

Geo-Seal® Vapor-Vent SOIL GAS COLLECTION SYSTEM
Version 1.2

SECTION 02292 – BROWNFIELD/METHANE GAS CONTROL
PART 1 – GENERAL 1.1 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 1 Specification Sections, apply to this Section.
1.2 SUMMARY
A. This Section includes the following:
1. Substrate preparation. 2. Strip Composite installation. 3. Strip Composite accessories.
B. Related Sections: The following Sections contain requirements that relate to this Section:
1. Division 2 Section “Earthwork”, “Pipe Materials”, “Sub-drainage systems”, ”Gas Control System”, “Vapor intrusion barrier”. 2. Division 3 Section “Cast-in-Place Concrete” for concrete placement, curing, and finishing.
3. Division 5 Section “Expansion Joint Cover Assemblies”, for expansion-joint covers assemblies and installation. 1.3 PERFORMANCE REQUIREMENTS
A. General: Provide a gas venting material that collects gas vapors and directs them to discharge or to collection points as specified in the gas vapor collection system drawings and complies with the physical requirements set forth by the
manufacturer. 1.4 SUBMITTALS A. Submit Product Data for each type of gas venting system specified, including manufacturer’s specifications.
B. Sample – Submit representative samples of the following for approval:
1. Gas venting, strip geocomposite. 2. Strip composite accessories.
1.5 QUALITY ASSURANCE A. Installer Qualifications: Engage an experienced Installer who is certified in writing and approved by Vapor intrusion
barrier manufacturer Land Science Technologies for the installation of the Geo-Seal® Vapor intrusion barrier System. B. Manufacturer Qualification: Obtain gas venting, vapor intrusion barrier and system components from a single
manufacturer Land Science Technologies C. Pre-installation Conference: A pre-installation conference shall be held prior to installation of the venting system, vapor
intrusion barrier and waterproofing system to assure proper site and installation conditions, to include contractor, applicator, architect/engineer and special inspector (if any). 1.6 DELIVERY, STORAGE, AND HANDLING
A. Deliver materials to Project site as specified by manufacturer labeled with manufacturer’s name, product brand name and type, date of manufacture, shelf life, and directions for handling.
B. Store materials as specified by the manufacturer in a clean, dry, protected location and within the temperature range required by manufacturer. Protect stored materials from direct sunlight. C. Remove and replace material that is damaged.
PART 2 – PRODUCTS 2.1 MANUFACTURERS
A. Land Science Technologies, San Clemente, CA. 949-366-8000
1. Strip Geocomposite – Geo-Seal Vapor-Vent 2.2 GAS VENT MATERIALS
A. Strip Geocomposite – Geo-Seal Vapor-Vent is a low profile, trenchless, flexible, sub slab vapor collection system used in lieu or in conjunction with perforated piping. Vapor-Vent is offered with two different core materials, Vapor-Vent PS is
recommended for sites with inert methane gas and Vapor-Vent HD is recommended for sites with aggressive chlorinated volatile organic or petroleum vapors. Manufactured by Land Science Technologies
B. Strip Geocomposite physical properties

2.3 AUXILIARY MATERIALS A. Geo-Seal Vapor-Vent pipe reducers.
B. Reinforced Tape.
VENT PROPERTIES TEST METHOD VAPOR-VENT PS VAPOR-VENT HD
Material Polystyrene HDPE
Comprehensive Strength ASTM D-1621 9,000 lbs / ft2 9,200 lbs / ft2
Shear Strength ASTM D-1621 9,500 lbs / ft2 N/A
Peel Strength ASTM D-1876 38 lbs / ft 35 lbs / ft
Fungus Resistance (core) ASTM G-21 No Growth No Growth
In-plane flow (Hydraulic gradient-0.1, loading-10 psi) ASTM D-4716 21 gpm / ft of width 21 gpm / ft of width Unobstructed inflow area Pavement side 85% 85%
Chemical Resistance N/A Excellent

FABRIC PROPERTIES TEST METHOD VAPOR-VENT-PS VAPOR-VENT-HD

Weight ASTM D-3776 4.0 oz. 4.5 oz. Grab Tensile Strength ASTM D-4632 115 lbs. 120 lbs.
Puncture Strength ASTM D-3787 70 psi 65 psi
Trapezoidal Tear ASTM D-4533 50 lbs. 30 lbs.
Mullen Burst Strength ASTM D-3786 240 psi 50 psi
Elongation ASTM D-4632 50% 50%
EOS (AOS) ASTM D-4751 80 70
Permeability ASTM D-4491 20 cm/sec 21 cm / sec Flow Rate ASTM D-4491 170 gpm / ft2 135 gpm / ft2
UV Stability (500 hours) ASTM D-4355 85% Retained 70% Retained
Fungus Resistance ASTM D-G21 No Growth No Growth

DIMENSIONAL DATA
Thickness 1” 1”
Standard Widths 12” 12” Roll Length 150 ft 150 ft
Roll Diameter 7 ft 7 ft
Roll Weight 60 lbs 60 lbs
PART 3 – EXECUTION 3.1 EXAMINATION A. Examine substrates, areas, and conditions under which gas vent system will be installed, with installer present, for
compliance with requirements. Do not proceed with installation until unsatisfactory conditions have been corrected. 3.2 SUBSTRATE PREPARATION
A. Verify substrate is prepared according to project requirements.
3.3 PREPARATION FOR STRIP COMPOSITE A. Mark the layout of strip geocomposite per layout design developed by engineer.
3.4 STRIP GEOCOMPOSITE INSTALLATION
A. Install Geo-Seal Vapor-Vent over substrate material where designated on drawings with the flat base of the core placed
down and shall be overlapped in accordance with manufacturer’s recommendations.
B. At areas where Geo-Seal Vapor-Vent strips intersect cut and fold back fabric to expose the dimpled core. Arrange the strips so that the top strip interconnects into the bottom strip. Unfold fabric to cover the core and use reinforcing tape, as
approved by the manufacturer, to seal the connection to prevent sand or gravel from entering the core. C. When crossing Geo-Seal Vapor-Vent over footings or grade beams, consult with the specifying environmental engineer and structural engineer for appropriate use and placement of solid pipe materials. Place solid pipe over or through concrete surface and attach a Geo-Seal Vapor-Vent pipe reducer at both ends of the pipe before connecting the Geo-Seal Vapor-Vent to the pipe reducer. Seal the Geo-Seal Vapor-Vent to the Geo-Seal Vapor-Vent pipe reducer
using fabric reinforcement tape. Refer to Vapor-Vent detail provided by Land Science Technologies. D. Place vent risers per specifying engineer’s project specifications. Connect Geo-Seal Vapor-Vent to Geo-Seal Vapor-Vent
pipe reducer and seal with fabric reinforced tape. Use Geo-Seal Vapor-Vent pipe reducer with the specified diameter piping as shown on system drawings.
3.5 PLACEMENT OF OVERLYING AND ADJACENT MATERIALS A. All overlying and adjacent material shall be placed or installed using approved procedures and guidelines to prevent
damage to the strip geocomposite. B. Equipment shall not be directly driven over and stakes or any other materials may not be driven through the strip
geocomposite.

© 2010 Land Science Technologies  1 

Geo-Seal Quality Control

Certified Applicator

Authorized installation of Geo-Seal can only be accomplished by one of Land Science Technologies Certified
Applicators.

Membrane Inspections

For projects that will require a material or system ( workmanship and material) warranty, Land Science Technologies
will require a manufacturer’s representative or certified 3rd party inspector to inspect and verify that the membrane
has been installed per the manufacturer’s recommendations.

The applicator is responsible for contacting the inspector for inspection. Prior to application of the membrane, a
notice period for inspection should be agreed upon between the applicator and inspector.

Material Yield

Material yield is one of the first indicators in determining if the Geo-Seal CORE layer has been installed correctly. A
baseline standard for yield is as follows:

Material
Container 60 dry mils 80 dry mils 100 dry mils
55 Gallon Drum 935 ft2 660 ft2 550 ft2
275 Gallon Tote 4,675 ft2 3,300 ft2 2,750 ft2
330 Gallon Tote 5,610 ft2 3960 ft2 3,300 ft2

The estimated yield is 17 ft2 per gallon for a 60 dry mil application using the recommended thickness, unless
otherwise noted by a specified engineer or regulatory agency.

Yields can decrease based on the complexity of the foundation. Projects containing many penetrations and areas
where a lot of detailing is required might reduce the material yield to 16 ft2 or 15 ft2 per gallon for a 60 mil membrane..

Millage Verification

The measurement tools listed below will help verify the thickness of the Geo-Seal CORE layer. As measurement
verification experience is gained, these tools will help confirm thickness measurements that can be obtained by
pressing one’s fingers into the Geo-Seal CORE membrane.

To verify the mil thickness of the Geo-Seal CORE, the following measurement devices are required:

Mil reading caliper: Calipers are used to measure the thickness of coupon samples. To measure coupon samples
correctly, the thickness of the Geo-Seal sheet layers must be taken into account (This is best done by obtaining a
sample of the Geo-Seal BASE layer and then zeroing out the caliper to the Geo-Seal BASE layer). Mark sample area
for repair.

Wet mil thickness gauge: A wet mil thickness gauge may be used to quickly measure the mil thickness of the Geo-
Seal CORE layer. The thickness of the Geo-Seal sheet layers do not factor into the mil thickness reading, but the
softness of the subgrade might result in inaccurate readings.

NOTE: When first using a wet mil thickness gauge on a project, collect coupon samples to verify the wet mil gauge
thickness readings.

Needle nose digital depth gauge: A needle nose depth gauge can be used when measuring the Geo-Seal CORE
thickness on vertical walls or in field measurements. Mark measurement area for repair.

To obtain a proper wet mil thickness reading, take into account the 5 to 10 percent shrinkage that will occur as the
membrane fully cures. Not taking into account the thickness of the sheet layers, a freshly sprayed membrane should
have a minimum wet thickness of 63 (5%) to 66 (10%) mils.
© 2010 Land Science Technologies  2 

Visual Inspections

The guidelines outlined in this section provide ways to quantify and observe the proper installation of the Geo-Seal
system. However, a visual inspection should also be done to ensure any visual imperfections are not present, i.e.
fish-mouths, punctures, voids, etc. During a visual inspection, punctures in the Geo-Seal system should be easy to
indentify due to the color contrasting layers of the system.

Membrane Testing Log

To aid in the inspection process and properly document the Geo-Seal membrane inspection, create a membrane
testing log. We recommend creating the log by using the foundation plan (plan view) of the structure and then
creating a 500 square foot grid over the foundation. If this is not able to be done, enclosed is a membrane testing log
template that can also be used. (Appendix E)

Wet Mil Thickness Readings

A wet mil thickness gauge is one method to verify the mil thickness of the Geo-Seal CORE layer. An advantage to
this method is the ability to verify the Geo-Seal CORE thickness by minimizing destructive coupon sampling.

1. Create a membrane testing log by obtaining a copy of the foundation plan and then draw a 500 square
foot grid over the foundation plan. Make two copies of the membrane testing log; one should be used
when collecting coupon samples and the other should be used when conducting the smoke test.

2. Note time, date, project name, inspector name, temperature and weather conditions on testing log.

3. Number each quadrant and inspect sequentially.

4. When arriving at each quadrant quickly assess if there are any conditions that might present any
challenges in establishing a proper seal. Note areas and discuss with applicator.

5. Conduct a visual inspection of the membrane. Look for areas where a proper seal was not created, i.e.
a fish-mouth at the termination and areas where the membrane might be sprayed thin. Mark areas
needed for repair in the field with florescent paint or with chalk. Also make a note on the testing log.

6. Conduct a thickness sample in the area that is suspected to be sprayed thin and take three readings
within 3” of one another. When beginning a project, verify the wet mil gauge thickness reading by
cutting a coupon sample and measuring the thickness with a caliper. Once wet mil thickness
readings have been confirmed and established, confirm wet mil thickness periodically by taking a
coupon sample and caliper measurement.

7. After sampling 5 quadrants it is at the discretion of the inspector to continue collecting samples every
500 ft2 or 1,000 ft2.

8. This method will verify the thickness of the Geo-Seal CORE layer prior to it fully curing. Observed
shrinkage of the Geo-Seal CORE layer during the curing process ranges from 5% to 10%. When taking
uncured samples assume a minimum of 10% loss for horizontal surfaces and 5% for vertical surfaces.
Assuming a 10% loss, the gauge should read a mil thickness between 65 and 70 mils (≥66 mils).

9. If using a wet mil gauge to verify a fully cured membrane the gauge should read 60 mils.

10. When testing is complete, send a copy of the membrane testing log to Land Science Technologies.
Keep the coupon samples for the file, or send them to Land Science Technologies.

© 2010 Land Science Technologies  3 

Coupon Sampling

Coupon sampling is the most accurate way to verify the Geo-Seal CORE thickness. However, please note that
taking too many coupon samples, or destructive samples, can be counter-productive. To collect a coupon sample
the following steps should be followed:

1. Create a membrane testing log by obtaining a copy of the foundation plan and then draw a 500 square
foot grid over the foundation plan. Make two copies of the membrane testing log, one should be used
when collecting coupon samples and the other should be used when conducting the smoke test.

2. Note time, date, project name, inspector name, temperature and weather conditions on testing log.

3. Number each quadrant and inspect sequentially.

4. When arriving at each quadrant quickly assess if there are any conditions that might present any
challenges in establishing a proper seal. Note areas and discuss with applicator.

5. Conduct a visual inspection of the membrane. Look for areas where a proper seal was not created, i.e.
a fish-mouth at the termination and areas where the membrane might be sprayed thin. Mark areas
needed for repair in the field with florescent paint or with chalk. Also make a note on the testing log.

6. Calibrate mil reading caliper to account for the thickness of the Geo-Seal BASE layer. This is best done
by obtaining a sample of the Geo-Seal BASE layer and then zeroing out the caliper to the Geo-Seal
BASE layer.

7. Collect a coupon sample in the area that is suspected to be sprayed thin. Use a box cutter to cut a 3
square inch sample from the membrane. Measure each side to confirm the specified minimum
thickness has been obtained. Number each sample and save in the job file. Mark the area for repair in
the field and on the site plan.

8. After sampling 5 quadrants it is at the discretion of the inspector to continue collecting samples every
500 ft2 or 1,000 ft2.

9. Samples may be collected prior to the Geo-Seal CORE layer fully curing. Observed shrinkage of the
Geo-Seal CORE layer during the curing process for horizontal surfaces is 10%. Assuming a 10% loss,
a minimum of 66 mills thickness should be measured for a cured measurement of 60 mils.

10. When testing is complete, send a copy of the membrane testing log to Land Science Technologies.
Keep the coupon samples for the file, or send them to Land Science Technologies.

Smoke Testing

This test is intended to visually verify and confirm the proper installation of the Geo-Seal system. Land Science
Technologies requires a smoke test on all projects in order to obtain a warranty. The smoke test will be performed by
the applicator.

Smoke testing should occur after the Geo-Seal CORE layer has been installed and mil thickness verified. Smoke
testing may occur after the Geo-Seal BOND layer is installed, if preferred by the applicator. Upon completion of the
original smoke test, additional smoke tests can be conducted per the membrane manufacturer’s, specifying engineer
or regulatory agency’s request. To conduct a smoke test follow these steps:

1. One smoke test can cover between 2000-3000 square feet per test. However, coverage will greatly
depend on the sub grade under the membrane. On sites where multiple smoke tests will be needed,
use the first two smoke tests to estimate the coverage area per test.

2. Visual verification of soundness of seams, terminations and penetrations should be performed.
Identify/correct any apparent deficiencies and/or installation problems.

3. Note time, date, project name, inspector name, temperature and weather conditions on testing log. In
addition, record humidity, barometric pressure, and wind speed/direction. Confirm wind speed is below
15 mph. Visual identification of leaks becomes more difficult with increasing wind speed.

4. Cap other vent outlet(s) not being used. If the installation has no sub-slab vent system or the
membrane is isolated from the vent system, connect the smoke testing system directly to the membrane
© 2010 Land Science Technologies  4 

using a temporary boot collar or other method. Insert the smoke test hose into coupon sampling
locations, creating a seal around the smoke test hose with a rag.

5. Activate the smoke generator/blower system and connect to sub-slab vent riser or directly to the
membrane.

6. To confirm the adequate flow of smoke under the membrane cut a 2” vent in the membrane to facilitate
the purging of air pockets under it. If working properly, smoke will consistently flow though the 2” vent.
If a low rate of smoke flow is observed it is an indication of poor smoke flow under the membrane. If
low flow does occur, insert the smoke testing hose into the 2” membrane vent.

7. Mark sampling locations with fluorescent paint or chalk. Repair sampling locations per Land Science
Technologies recommendations

8. Maintain operation of smoke generator/blower system for at least 15 minutes following purging of
membrane. Thoroughly inspect entire membrane surface. Use fluorescent paint or chalk to mark/label
any leak locations. Mark/label leak locations on testing log. NOTE: The duration of the smoke test will
vary depending on the size of the area being tested. To help determine the duration, monitor the
pressure building up under the membrane. If excessive lifting of the membrane occurs, decrease the
duration or pressure of the smoke test.

9. Prepare membrane inspection log. Identify the type of leak found, i.e. poor seal around penetration,
fish-mouth, puncture, etc.

10. Repair leak locations marked in step 7 and step 8 per procedures outlined in “Geo-Seal Repair
Procedures” section using Geo-Seal CORE or Geo-Seal DETAIL.

11. Repeat steps 4 through 10 as necessary to confirm the integrity of the membrane.

12. Complete the smoke testing inspection form indicating the successful completion of the smoke test.

Post Installation Inspection

After a manufacturer’s representative or 3rd party inspector signs off on the membrane installation and the steel
workers begin to install the rebar, it is recommended to conduct a visual inspection prior to the pouring of concrete.
Damages are most likely to occur during this time and it is imperative that punctures are indentified prior to the
placement of the slab. The system configuration of Geo-Seal, the top white Geo-Seal BOND layer with a middle
black layer, will make rebar punctures easy to identify when conducting a visual inspection.

3. General Notes

GENERAL NOTES
PERFORMANCE OBJECTIVE
PROVIDE VAPOR INTRUSION MITIGATION SYSTEMS/MEASURES (VAPOR BARRIERS,
VAPOR VENTS, RETROFIT SYSTEMS INCORPORATING VAPOR MATS, RETROCOAT, SEALING PENETRATIONS, ETC.) AS NOTED ON DRAWINGS AND HEREIN.
SCOPE OF WORK
THE PROPOSED WORK GENERALLY CONSISTS OF THE FOLLOWING ITEMS:
 PREPARATION OF PRELIMINARY SUBMITTALS FOR REVIEW AND APPROVAL.
 EMPLOYMENT OF MEASURES NECESSARY TO MINIMIZE OR AVOID POTENTIAL IMPACTS TO THE ENVIRONMENT, PUBLIC AND WORKER SAFETY, AND EXISTING
PROPERTY FROM PROPOSED CONSTRUCTION ACTIVITIES.
 INSTALLATION OF MITIGATION SYSTEM, INCLUDING, BUT NOT LIMITED TO:
O INSTALLATION OF GEO-SEAL SYSTEM, CONSISTING OF VAPOR VENTS,
GEO-SEAL BASE, GEO-SEAL CORE, AND GEO-SEAL BOND, IN ACCORDANCE
WITH MANUFACTURER’S RECOMMENDATIONS.
O SUPPLY AND INSTALLATION OF VAPOR VENTS, WITH DISCHARGE PIPING
EXTENDING VERTICALLY INSIDE THE BUILDING, PENETRATING THE ROOF,
AND EXTENDING TO THE DISCHARGE COLLECTION POINT AREA ON THE ROOF, AS SHOWN ON THE DRAWINGS AND SPECIFIED HEREIN.
O SEALING CONCRETE FLOOR PENETRATIONS.
O COATING CONCRETE FLOORS.
O INSTALLATION OF GEO-SEAL RETROFIT SYSTEM, CONSISTING OF VAPOR
MATS, GEO-SEAL SYSTEM, AND RISERS CONNECTED TO VAPOR MATS.
 SUCCESSFUL COMPLETION OF MITIGATION SYSTEM QUALITY ASSURANCE TESTING/CERTIFICATION (COUPON THICKNESS MEASUREMENTS, SMOKE
TESTING, ETC.).
 PREPARATION OF RECORD DRAWINGS AND SUBMITTALS.

INCIDENTAL WORK, RELATED TO THE ACTIVITIES LISTED ABOVE, SHALL ALSO BE INCLUDED IN THE CONTRACT AND SHALL INCLUDE, BUT NOT BE LIMITED TO, THE
FOLLOWING:
 IMPLEMENTATION OF NECESSARY HEALTH AND SAFETY MEASURES, INCLUDING BUT NOT LIMITED TO AIR MONITORING PROGRAMS, FALL PROTECTION, DUST
CONTROL MEASURES, AND SITE CONTROL MEASURES (SIGNAGE, BARRICADES,
SAFETY FENCING AND OTHER WARNING DEVICES).
 CONDUCT AND DOCUMENT DAILY TAIL-GATE MEETINGS PRIOR TO THE START
OF WORK TO REVIEW AT A MINIMUM THE PLAN FOR THE DAY; ROLES AND
RESPONSIBILITIES; HEALTH AND SAFETY; AND POSSIBLE ISSUES/CONCERNS.
 PROVISION OF PERSONAL PROTECTIVE EQUIPMENT (PPE); DECONTAMINATION
EQUIPMENT AND SUPPLIES; MONITORING EQUIPMENT; AND OTHER SAFETY EQUIPMENT NECESSARY TO EXECUTE THE WORK IN ACCORDANCE WITH THE SITE-SPECIFIC HEALTH AND SAFETY PLAN.
GENERAL NOTES
THE SCOPE OF WORK DOES NOT INCLUDE REMOVAL OF THE EXISTING WOOD BLOCK TILE FLOORING, AND THE EXISTING CONCRETE SLAB UNDERNEATH THE WOOD
BLOCKS. THE WOOD BLOCKS AND CONCRETE SLAB, AS WELL AS SOME SOIL, WILL BE
REMOVED BY OTHERS TO ACHIEVE DESIRED GRADE, AND A LAYER OF WASHED STONE WILL BE INSTALLED PRIOR TO INSTALLATION OF THE VAPOR MITIGATION SYSTEM IN
AREAS NOTED. GENERAL REQUIREMENTS
THE FOLLOWING GENERAL REQUIREMENTS SHALL APPLY TO THE PROPOSED WORK:
 ALL WORK SHALL BE PERFORMED IN COMPLIANCE WITH APPLICABLE FEDERAL,
STATE, AND LOCAL REGULATORY REQUIREMENTS, CODES, AND RECOMMENDED INDUSTRY PRACTICES.
 OBTAIN ALL NECESSARY LICENSES, PERMITS, AND INSPECTIONS AND PERFORM
ANY REQUIRED REGULATORY NOTIFICATIONS.
 PERFORM ALL WORK IN ACCORDANCE WITH THE DESIGN DRAWINGS AND
CONTRACT REQUIREMENTS.
 INSTALL ALL MATERIALS AND EQUIPMENT IN ACCORDANCE WITH THE MANUFACTURER’S INSTALLATION INSTRUCTIONS.
 COORDINATE WORK ENTRANCES AND SCHEDULE WITH OWNER.
SUBMITTALS

THE FOLLOWING ITEMS SHALL BE SUBMITTED FOR REVIEW AND APPROVAL BY THE ENGINEER WITH EXCEPTION TO THE SITE-SPECIFIC HEALTH AND SAFETY PLAN WHICH
SHALL BE PREPARED BY THE ENGINEER AND ACKNOWLEDGED BY THE CONTRACTOR. THE CONTRACTOR IS RESPONSIBLE FOR THE HEALTH AND SAFETY OF ITS OWN
EMPLOYEES, VENDORS AND SUBCONTRACTORS AND THAT OF OTHERS AS REQUIRED
UNDER THE CONTRACT DOCUMENTS.
 A SITE-SPECIFIC HEALTH AND SAFETY PLAN SHALL BE COMPLETED BY THE
ENGINEER PRIOR TO THE START OF ANY ON-SITE WORK AND IS RECOMMENDED TO INCLUDE AT A MINIMUM:
O THE APPROACH FOR CONFORMING WITH THE REQUIREMENTS OF THE
OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION (OSHA) STANDARD 29 CFR 1926 FOR EXCAVATIONS;
O THE APPROACH FOR CONFORMING WITH THE REQUIREMENTS OF THE
OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION (OSHA) STANDARD 29 CFR 1926 FOR FALL PROTECTION;
O A HAZARDS ACTIVITY ANALYSIS AND ASSESSMENT TO IDENTIFY, ASSESS
AND MITIGATE CHEMICAL AND PHYSICAL HAZARDS ASSOCIATED WITH OR ANTICIPATED FOR THE WORK FOR THE SUBCONTRACTOR’S
EMPLOYEES AND THE GENERAL PUBLIC;
O THE PROPOSED MONITORING PROGRAM FOR MINIMIZATION OF FUGITIVE DUSTS, VOCS, AND ODORS;
O IDENTIFICATION OF THE ANTICIPATED ENTRY LEVEL OF PPE, AND A
CONTINGENCY PLAN FOR UPGRADES IN LEVELS OF PROTECTION;
GENERAL NOTES
O EQUIPMENT AND PERSONNEL DECONTAMINATION PROCEDURES; AND
O AN EMERGENCY CONTINGENCY PLAN.
 A WORK PLAN SHALL BE COMPLETED PRIOR TO THE START OF CONSTRUCTION AND SHALL INCLUDE AT LEAST THE FOLLOWING:
O THE PROPOSED CONSTRUCTION METHODOLOGY AND WORK SEQUENCING
O PROPOSED EQUIPMENT TO BE USED, PARTICULARLY FOR ELEVATED WORK
O SITE LAYOUT
O THE ESTIMATED PROJECT SCHEDULE
O MATERIALS MANAGEMENT PROCEDURES
O ANY DEVIATIONS ANTICIPATED FROM THE DESIGN
O ANY SUPPORTING CALCULATIONS
O A SUBCONTRACTOR QUALITY CONTROL PLAN, INCLUDING THE PROCEDURE FOR COMPLETION OF INSPECTIONS TO ASSURE THAT THE
SYSTEM DEMONSTRATES THE COMPLETE EFFECTIVENESS OF THE SYSTEM
 VENDOR CUT SHEETS, PRODUCT EXAMPLES, TECHNICAL DATA, AND QUALITY
CONTROL TESTING INFORMATION FOR PROPOSED MATERIALS AND EQUIPMENT.
 A DAILY SUMMARY REPORT USED TO DOCUMENT THE WORK COMPLETED, THE
QUANTITIES OF MATERIALS USED, THE RESULTS OF QUALITY CONTROL TESTING,
AND THE EQUIPMENT AND LABOR HOURS. THIS DAILY REPORT SHALL BE REVIEWED AND APPROVED BY THE ENGINEER ON A DAILY BASIS.
 A PROJECT COMPLETION REPORT, DOCUMENTING THE RESULTS OF INSTALLATION ACTIVITIES, SHALL BE SUBMITTED WITH RECORD DRAWINGS
(HARD COPY) FOLLOWING THE COMPLETION OF WORK AT THE SITE.
PROJECT SCHEDULE AND COORDINATION
WORK AT THE SITE SHALL BE INITIATED NO LATER THAN 10 DAYS AFTER NOTICE TO
PROCEED IS RECEIVED FROM THE OWNER, AND THE CONSTRUCTION OF EACH PHASE SHALL BE COMPLETE NO LATER THAN 30 DAYS AFTER NOTICE TO PROCEED IS
RECEIVED FROM THE OWNER.
TO ENSURE COORDINATION BETWEEN THE CONTRACTOR, THE ENGINEER, AND OWNER,
THE CONTRACTOR SHALL BE RESPONSIBLE FOR THE FOLLOWING ITEMS:
A. SUBMIT NOTIFICATIONS AND ACQUIRE REQUIRED STATE AND/OR LOCAL
PERMITS. COPIES OF ALL PERMITS SHALL BE PROVIDED TO THE OWNER AND THE ENGINEER.
B. CONDUCT A PRE-CONSTRUCTION MEETING AT THE SITE PRIOR TO
COMMENCING WORK. THE CONTRACTOR SHALL NOTIFY THE ENGINEER AND OWNER AT LEAST 5 WORKING DAYS IN ADVANCE OF THE PROPOSED
MEETING DATE.
C. COORDINATE WORK WITH OWNER.
GENERAL NOTES
D. IDENTIFY EQUIPMENT AND MATERIAL STAGING AREAS WITHIN THE LIMITS OF WORK, FOR APPROVAL BY THE ENGINEER AND OWNER. ALL MATERIALS
SHALL BE STORED NEATLY AND IN SUCH A WAY TO PREVENT DAMAGE TO
THE MATERIALS OR EXISTING FACILITIES.
E. MOBILIZE THE NECESSARY EQUIPMENT, MATERIALS, SUPPLIES, AND
PERSONNEL TO THE SITE AS REQUIRED FOR THE TIMELY EXECUTION OF THE WORK.
F. PROVIDE THE NECESSARY TEMPORARY FACILITIES, INCLUDING SANITARY
FACILITIES, AND REFUSE MANAGEMENT, AT THE SITE THAT IS NOT CURRENTLY AVAILABLE ON-SITE.
G. MAINTAIN THE PROJECT SITE IN A NEAT CONDITION.

THE ENGINEER, OR OWNER, SHALL BE RESPONSIBLE FOR THE FOLLOWING ITEMS:
A. CONSTRUCTION OVERSIGHT ON BEHALF OF OWNER.
B. CORRESPONDENCE WITH THE PUBLIC, PAST, CURRENT, OR FUTURE SITE OCCUPANTS, AND THE MEDIA. THE CONTRACTOR SHALL DIRECT ANY
INDIVIDUALS THAT VISIT THE SITE INQUIRING ABOUT SITE ACTIVITIES TO
THE ENGINEER’S ON-SITE REPRESENTATIVE OR THE OWNER’S ON-SITE REPRESENTATIVE.
C. REVIEW AND APPROVAL OF CONTRACTOR’S CHANGE ORDER REQUESTS.
D. REJECTION AND STOPPAGE OF ANY WORK WHICH DOES NOT MEET THE MINIMUM REQUIREMENTS OF THE CONTRACT DOCUMENTS OR IN THE VIEW
OF THE ENGINEER IS CONSIDERED AN UNSAFE WORK PRACTICE.

ENVIRONMENTAL PROTECTION
THE CONTRACTOR SHALL PERFORM THE WORK IN A MANNER TO MINIMIZE
ENVIRONMENTAL POLLUTION AND DAMAGE AS THE RESULT OF CONSTRUCTION OPERATIONS, BY PRESERVING THE NATURAL RESOURCES WITHIN THE PROJECT
BOUNDARIES AND OUTSIDE THE LIMITS OF WORK. THE CONTROL OF ENVIRONMENTAL
POLLUTION AND DAMAGE REQUIRES CONSIDERATION OF LAND, WATER, AND AIR, AND INCLUDES MANAGEMENT OF VISUAL AESTHETICS, NOISE, SOLID WASTE, AND DUST, AS
WELL AS OTHER POLLUTANTS.
THE CONTRACTOR SHALL CONFINE ALL ACTIVITIES TO AREAS DEFINED BY THE
DRAWINGS. THE CONTRACTOR SHALL MANAGE MATERIAL STOCKPILES,
DECONTAMINATION AND DEWATERING FLUIDS, AND AIR QUALITY TO ENSURE IMPACTS ON THE ENVIRONMENT ARE MINIMIZED, TO THE EXTENT PRACTICABLE.

AT THE COMPLETION OF THE CONSTRUCTION ACTIVITIES, THE CONTRACTOR WILL PROVIDE MATERIALS, EQUIPMENT, AND LABOR NECESSARY FOR THE REMOVAL OF ANY
TEMPORARY STRUCTURES.
GENERAL NOTES
PROVISIONS SHALL BE TAKEN DURING ALL CONSTRUCTION ACTIVITIES TO KEEP AIRBORNE DUST LEVELS LOW. ONLY CLEANING TO ALLOW FOR EFFICIENT WORK WILL
BE REQUIRED.
EXISTING SUBSURFACE CONDITIONS
THE SITE IS THE LOCATION OF HISTORICAL MANUFACTURING ACTIVITIES AND CURRENT RETAIL/OFFICE ACTIVITIES. IT IS POSSIBLE THAT POCKETS WITH
CONCENTRATIONS OF VOLATILE ORGANIC COMPOUNDS IN SOIL GAS MAY BE ENCOUNTERED.

PRIOR TO THE INITIATION OF ON-SITE ACTIVITIES, THE CONTRACTOR SHALL COORDINATE WITH THE ENGINEER AND THE OWNER REGARDING THE LOCATIONS OF
EXISTING UNDERGROUND UTILITIES AND STRUCTURES. THE CONTRACTOR SHALL BE
RESPONSIBLE FOR THE DAMAGE OF AND THE LOCATION OF ALL UNDERGROUND UTILITIES AND STRUCTURES. THE CONTRACTOR SHALL ALSO BE RESPONSIBLE FOR
ALL DAMAGE TO EXISTING KNOWN UTILITIES BOTH ABOVE AND BELOW GROUND
CAUSED BY THE CONTRACTOR AND OR LOWER TIER SUBCONTRACTORS. THE CONTRACTOR SHALL CONTACT OWNER AND ENGINEER AS SOON AS ANY DAMAGE TO
UTILITIES IS DISCOVERED. THE ENGINEER AND THE OWNER SHALL MAKE THE
DETERMINATION AS TO WHETHER REPAIRS ARE NECESSARY AND THE MATERIALS AND METHODS THAT WILL BE USED.

CONTRACTOR QUALITY CONTROL
THE CONTRACTOR SHALL BE RESPONSIBLE FOR THE FOLLOWING PRIOR TO THE INITIATION OF WORK:
A. SUBMISSION OF A WORK PLAN DOCUMENTING THE PROPOSED SYSTEM
INSTALLATION INCLUDING ANY PROPOSED VARIATIONS FROM THE DESIGN DRAWINGS.
B. SUBMISSION OF SHOP DRAWINGS, VENDOR CUT SHEETS, PRODUCT SAMPLES,
AND/OR TECHNICAL DATA PROVIDING INFORMATION ON THE MATERIALS PROPOSED FOR DURING THE INSTALLATION.
C. SUBMISSION OF THE RESULTS OF THE REQUIRED QUALITY CONTROL TESTING
FOR MATERIALS, BOTH FAILING AND PASSING. OTHER TESTING METHODS THAN THOSE LISTED BELOW MAY BE CONSIDERED ACCEPTABLE, AS
APPROVED BY THE PROJECT ENGINEER.
 GEO-SEAL ORIGINATION DOCUMENTATION FOR MATERIALS.
THE CONTRACTOR SHALL BE RESPONSIBLE FOR THE FOLLOWING DURING
CONSTRUCTION ACTIVITIES:
A. DAILY CHECKS OF THE WORK TO ENSURE THAT IT IS IN FULL COMPLIANCE WITH THE REQUIREMENTS OF THIS SOW AND THE DRAWINGS.
B. VERIFY ADEQUACY OF CONTROLS TO ENSURE FULL COMPLIANCE WITH THE REQUIREMENTS AS SHOWN ON THE DRAWINGS.
C. DAILY SAFETY CHECKS TO INCLUDE COMPLIANCE WITH AND UPGRADING
OF THE SAFETY PLAN AND ACTIVITY HAZARD ANALYSIS. REVIEW THE ACTIVITY ANALYSIS WITH EACH WORKER, AS APPLICABLE.
GENERAL NOTES
D. VISUAL INSPECTION OF MITIGATION SYSTEM MATERIAL TO CHECK FOR COMPLIANCE.
E. PRESSURE TEST PIPING BETWEEN VAPOR VENTS/MATS AND DISCHARGE
POINT. PIPING MUST BE ABLE TO MAINTAIN A CONSTANT PRESSURE OF 5 POUNDS PER SQUARE INCH (PSI) FOR AT LEAST 12 CONTINUOUS HOURS
WITHOUT LOSS OF MORE THAN 0.1 PSI TAKING INTO ACCOUNT TEMPERATURE DIFFERENCES. DO NOT PRESSURIZE THE PIPING MORE THAN 5 PSI.
F. IF DEFICIENCIES ARE IDENTIFIED, THEY SHALL BE DOCUMENTED AND CORRECTED PRIOR TO CONTINUATION OF THE WORK.

THE CONTRACTOR SHALL BE RESPONSIBLE FOR THE FOLLOWING AFTER THE COMPLETION OF CONSTRUCTION ACTIVITIES:
A. ACCOMPANY ENGINEER ON A SUBSTANTIAL COMPLETION INSPECTION AND
DOCUMENT PUNCH LIST ITEMS THAT DO NOT CONFORM TO THE APPROVED DRAWINGS, AS NECESSARY.
B. RECTIFY IDENTIFIED PUNCH LIST ITEMS AND PROVIDE WRITTEN
RESOLUTION FOR EACH ITEM.
C. MAINTAIN CURRENT RECORDS PROVIDING FACTUAL EVIDENCE THAT
REQUIRED QUALITY CONTROL ACTIVITIES AND/OR TESTS HAVE BEEN
PERFORMED. THE RECORDS SHALL INCLUDE THE FOLLOWING INFORMATION:
 CONTRACTOR/LOWER TIER SUBCONTRACTOR AND THEIR AREA OF
RESPONSIBILITY.
 DAILY SUMMARY REPORTS.
 QUANTITY OF MATERIALS RECEIVED AT THE SITE WITH STATEMENT AS TO ACCEPTABILITY.
 SUBMITTALS AND DELIVERABLES REVIEWED.
 JOB SAFETY EVALUATION STATING WHAT WAS CHECKED, RESULTS, AND CORRECTIVE ACTIONS.
 SUBCONTRACTOR’S VERIFICATION STATEMENT.
WARRANTY

A WARRANTY THROUGH GEO-SEAL WILL BE PROVIDED FOLLOWING SUCCESSFUL COMPLETION OF THE SYSTEM INSTALLATION AND SUCCESSFUL QUALITY ASSURANCE
TESTING.
MITIGATION SYSTEM INSTALLATION

THE MITIGATION SYSTEM, AND VAPOR VENTS, SHALL BE INSTALLED AT THE LOCATIONS SHOWN ON THE DRAWINGS, EXCEPT AS MODIFIED DUE TO THE PRESENCE
OF UTILITIES OR OTHER OBSTRUCTIONS NOT CURRENTLY IDENTIFIED, AND AS APPROVED BY THE ENGINEER AND OWNER, AND CONSTRUCTED AS SHOWN ON THE DRAWINGS.
GENERAL NOTES
INDOOR ABOVE-GRADE PIPING

PIPING WILL BE UNDERGROUND AT THE CONNECTION TO THE VAPOR VENT/MAT, TO THE BUILDING COLUMN OR WALL AS SHOWN ON THE DRAWINGS. AT THE
COLUMN/WALL, THE PIPING SHALL BEND AT A 90-DEGREE ANGLE, EMERGE FROM THE FLOOR, AND CONTINUE VERTICALLY TO THE CEILING. THE PIPING WILL PENETRATE THE ROOF AND THEN BEND AT A 90-DEGREE ANGLE AND BE ROUTED ON THE ROOF TO
THE VENT DISCHARGE AREA INDICATED ON THE DRAWINGS. ALL ABOVE-GROUND PIPING SHALL BE SOLVENT WELDED SCHEDULE 80 PVC. PIPE SIZES SHALL BE AS LISTED
ON THE DRAWINGS.
PENETRATIONS OF THE ROOF SHALL BE WATER TIGHT AND COMPATATIBLE WITH THE
EXISTING ROOF. THE HORIZONTAL PIPING SHALL BE PLACED AND SUPPORTED IN
ACCORDANCE WITH MANUFACTURER’S RECOMMENDATIONS WITH A SLOPE OF NOT LESS THAN ONE PERCENT DOWN/BACK TO THE ASSOCIATED VAPOR VENT RISER.

PIPING SHALL BE LABELED AS DIRECTED BY THE ENGINEER AS “SOIL GAS” WITH FLOW DIRECTION ARROWS.

SUPPORTS FOR HORIZONTAL PIPING SHALL BE INSTALLED AT DISTANCES RECOMMENDED BY THE PIPE MANUFACTURER. VERTICAL RUNS SHALL BE SECURED
EITHER ABOVE OR BELOW THE POINTS OF PENETRATION THROUGH FLOORS AND
CEILINGS, AND AT LEAST EVERY 8 FEET. INTERIOR AND EXTERIOR HANGERS (CLEVIS-TYPE) AND SUPPORTS SHALL BE GALVANIZED STEEL, EXCEPT THAT PIPE CLAMPS MAY
BE CONSTRUCTED OF NYLON (“CLIC” SYSTEM OR EQUIVALENT). HORIZONTAL RUNS OF PIPING SHALL BE SLOPED TO ENSURE THAT WATER FROM RAIN OR CONDENSATE
DRAINS DOWNWARD INTO THE VAPOR VENT TO THE EXTENT PRACTICABLE. MAXIMUM
RISER LENGTH SHALL BE 100 FEET MEASURED ALONG SOLID PIPE.
FINAL DISCHARGE LOCATIONS SHALL BE LOCATED AT LEAST 10 FEET OR MORE AWAY
FROM ANY WINDOW, DOOR, OR OTHER OPENING INTO CONDITIONED SPACES INTENDED FOR OCCUPANCY. FINAL DISCHARGE LOCATIONS SHALL BE LOCATED AT LEAST 10 FEET
OR MORE AWAY FROM ANY FRESH AIR INTAKE OF HEATING, VENTILATION, AND AIR
CONDITIONING SYSTEM/UNIT. PROVIDE APPROPRIATE ATTCHMENT OF THE PIPE DISCHARGE VENTS TO THE EXISTING MASONRY WALL ON THE ROOF. FIT A
VENTILATOR PIPE CAP, SUCH AS AN ACTIVE VENTILATION PRODUCTS, INC. MODEL AV-
3-PVC AURA PIPE CAP, TO THE TOPS OF THE DISCHARGE VENTS.

4. Vapor Mitigation System Drawings/Details

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ENVIRONMENTAL CONTINGENCY PLAN
for
SUBSURFACE ACTIVITIES
ATHERTON MILL
2000, 2100, 2130 and 2140 South Boulevard
Charlotte,North Carolina
Prepared by:
Amec Foster Wheeler Environment & Infrastructure, Inc.
May 9, 2016
Amec Foster Wheeler Project 6228-12-0051
Environmental Contingency Plan for Subsurface Activities May 9, 2016
Atherton Mill, Charlotte, North Carolina
Amec Foster Wheeler Project 6228-12-0051
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TABLE OF CONTENTS
Page
EXECUTIVE SUMMARY...............................................................................................................II
1.PROJECT BACKGROUND......................................................................................................1
2.PROCEDURES...........................................................................................................................3
2.1.Discovery of Environmental Conditions...........................................................................3
2.2.Communications Procedures............................................................................................3
2.3.Provisions for Field Screening of Volatile Compounds in Soil.....................................42.4.Soil Sampling Protocols and Methods.............................................................................4
2.5.Soil Management Provisions.............................................................................................5
3.REPORTING ...............................................................................................................................7
Figure C-1: Contaminated Soil Stockpile Diagram
Environmental Contingency Plan for Subsurface Activities May 9, 2016
Atherton Mill, Charlotte, North Carolina
Amec Foster Wheeler Project 6228-12-0051
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EXECUTIVE SUMMARY
This Executive Summary has been written as a simplified reference guide, but is not a
substitute for complete review of this Environmental Contingency Plan for Subsurface
Activities (ECP).This ECP was prepared in conjunction with the North Carolina
Department of Environmental Quality (NCDEQ) Brownfields Program Environmental
Management Plan (EMP).Based on the previous environmental investigations conducted
at the Site, adverse environmental conditions in soil at the Site might be encountered
during subsurface activities.Therefore,Atherton Mill (E&A), LLC (Owner)and Site
development contractors must employ certain procedures during planning and performing
subsurface activities, which are summarized below. These precautions are not meant to
encompass standard construction site safety or supersede OSHA guidelines.
Instruct workers to report to senior Site personnel if any unusual subsurfaceconditions,such as unusual odors, staining, pooled liquids, buried tanks or drums,landfills, fuel lines, etc., are encountered.
Temporarily cease work in such an area if a suspected environmental condition isobserved.
Notify the designated Owner representative,(who will then notify its agent retainedfor the project), who will coordinate a preliminary field investigation of the
environmental condition.
Pending the results of the preliminary field investigation, excavate and properly
stockpile potentially-contaminated soil or materials only as needed to continueperforming the subsurface activities.
The Owner will arrange for the proper disposal of contaminated soil upon receipt of
laboratory analysis.
After completion of the phase of subsurface activities and disposal of
contaminated soil, provide a report to regulators documenting the activities.
Environmental Contingency Plan for Subsurface Activities May 9, 2016
Atherton Mill, Charlotte, North Carolina
Amec Foster Wheeler Project 6228-12-0051
1.PROJECT BACKGROUND
Atherton Mill (E&A), LLC (Owner)purchased the approximately 9.755-acre property
located at 2000,2100, 2130, and 2140 South Boulevard in Charlotte, North Carolina
(Site). The Site is currently occupied by commercial businesses. Redevelopment is
proposed that will include some residences.Subsurface activities are planned during
redevelopment.
Environmental assessment and monitoring activities have been conducted at the Site
since the 1990s as a result of the detection of volatile organic compounds (VOCs),
primarily trichloroethylene (TCE),in soil and groundwater.Historical groundwater
monitoring indicates dissolved-phase TCE concentrations in groundwater in the northern
portion of the Site.Soil in the northwestern portion of the property was previously
remediated,and sub-slab soil gas samples in the northern portion of the Site (Building 1)
contained TCE.Vapor mitigation systems/barriers have been, or are being, installed in
areas of Building 1.Historical environmental sampling data, and figures showing soil
contamination/restrictions and vapor intrusion potential,are included in the Site’s
Environmental Management Plan (EMP).
Based on the detected contamination,the Site was entered into the NCDEQ Brownfields
Program.The draft Brownfields Agreement for the Site requires preparation, approval by
NCDEQ, and implementation of an EMP and this ECP for subsurface activities at the Site.
The following elements are included in this ECP:
1.Provisions for field screening of volatile compounds;
2.Soil sampling protocols and methods in the event field screening limits for volatilecompoundsare exceeded;
3.Soil management provisions in the event soil sampling reveals contamination inexcess of the most recent Protection of Groundwater Soil Remediation Goals of
NCDEQ’s Inactive Hazardous Sites Branch or the Maximum Soil Contaminant
Concentrations of NCDEQ’s Underground Storage Tank Section;
4.The requirement that a written report regarding the plan’s implementation be
submitted to NCDEQ and that any deficiencies NCDEQ identifies in the report or in
the plan’s implementation be corrected to NCDEQ’s written satisfaction.
Environmental Contingency Plan for Subsurface Activities May 9, 2016
Atherton Mill, Charlotte, North Carolina
Amec Foster Wheeler Project 6228-12-0051
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This ECP for subsurface activities was prepared to address the above items and
describes the responsibility of Contractors and Subcontractors in the event that
potentially-contaminated soil/materials are encountered during subsurface activities. The
goal of describing this responsibility is to instill environmental awareness so that Site
Contractors and Subcontractors will recognize potential problems and immediately notify
the appropriate specified party(s), thereby limiting delays in properly handling potential
contaminated soil. The ECP does not seek to address requirements, responsibilities or
obligations set forth in project bid packages, drawings, specifications, or contractual
agreements. This ECP does not cover worker health and safety issues which are the
individual responsibility for each employer working on the project Site.
Environmental Contingency Plan for Subsurface Activities May 9, 2016
Atherton Mill, Charlotte, North Carolina
Amec Foster Wheeler Project 6228-12-0051
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2.PROCEDURES
This ECP addresses actions to be taken in the event that potential environmental
conditions are encountered at the project Site during subsurface activities.
2.1.Discovery of Environmental Conditions
Contractors and Subcontractors shall be constantly aware of the possible discovery of
potentially-contaminated soil (through the observation of unusual odors,unnatural
staining, suspect pooled liquids, etc.) during subsurface activities at the Site.Potentially-
contaminated soil may also be suspected if underground storage tanks, fuel lines, drums
or debris with chemical/warning labels are discovered during subsurface activities.
If an environmental condition is encountered or suspected, the Contractor or
Subcontractor shall temporarily suspend work in that area immediately, isolate the area
(i.e., restrict access to the area), and immediately inform the responsible persons listed in
the Communication Procedures section below. The Owner will designate an
environmental consultant to assess the potentially-contaminated soil identified by the
Contractor or Subcontractor. The environmental consultant will monitor subsurface
activities.
2.2.Communications Procedures
In the event that obvious or suspected contaminated soil is identified during work activities
when the environmental consultant is not present, the Contractor or its Subcontractor
should immediately contact the appropriate individual(s) as identified below. The Owner’s
representative is the first entity the Contractor should call. The Owner will then contact
their designated environmental consultant (Amec Foster Wheeler Environment &
Infrastructure, Inc.).
Atherton Mill (E&A), LLC (Owner)
Primary Contact:Mr. Jim McKenney, PE [phone] (mobile)
Secondary Contact:Mr. Lyle Darnall [phone] (office)
Environmental Contingency Plan for Subsurface Activities May 9, 2016
Atherton Mill, Charlotte, North Carolina
Amec Foster Wheeler Project 6228-12-0051
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Amec Foster Wheeler Environment & Infrastructure, Inc.
Primary Contact:Mr.Rob Foster [phone] (office)[phone] (mobile)
Secondary Contact:Mr.Andrew Frantz [phone] (office)[phone] (mobile)
If any situation which arises is immediately dangerous to human health and/or the
environment, as deemed by the Contractor on the work Site at the time of occurrence or
the environmental consultant, the Contractor shall immediately evacuate the area, as
appropriate to prevent injury, and immediately notify the appropriate emergency response
agency.The Contractor shall then follow the above path of communication if the
environmental consultant is not present.
2.3.Provisions for Field Screening of Volatile Compounds in Soil
The environmental professional may request assistance of the Contractor and/or
Subcontractor with environmental field screening if the environmental professional deems
such screening to be necessary and appropriate (e.g. using equipment such as a backhoe
or excavator to collect samples).The environmental professional will place samples of the
potentially-contaminated soil in plastic bags and screen the headspace for volatile
compounds using a photoionization detector (PID).If the field screening indicates PID
readings that are less than 10 parts per million (ppm), the work in the area may proceed.
However, if field screening indicates PID readings greater than 10 ppm,the environmental
professional will direct the Contractor and/or Subcontractor to segregate the potentially-
contaminated soil.Screening and segregation of potentially-contaminated soil will
continue until PID readings are less than 10 ppm.
2.4.Soil Sampling Protocols and Methods
After an area of potentially-contaminated soil is excavated (and segregated), the
environmental professional will collect confirmation soil samples along the sidewalls of the
excavation.Confirmation soil samples will be collected from the excavation sidewalls at a
depth that is at least one-half the depth of the excavation.In general, the soil samples will
be collected from alternating sidewalls every ten linear feet of the sidewall for utility trench
excavations, every 20 feet of excavations which are less than twice as wide as deep,or in
20-feet by 20-feet grids for general ‘shallow’excavations (more than twice as wide as
Environmental Contingency Plan for Subsurface Activities May 9, 2016
Atherton Mill, Charlotte, North Carolina
Amec Foster Wheeler Project 6228-12-0051
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deep). Field duplicate samples will also be collected at a frequency of ten percent. Soil
samples will be submitted for analysis of VOCs according to EPA 8260.
Potentially-contaminated soil will be stockpiled and sampled to determine the disposition
of the soil (i.e., hazardous or non-hazardous). Stockpiled soil will be divided into
approximate 100 cubic yard sections.Five grab soil samples will be randomly collected
from each section. The samples will be collected at different depths within the stockpile
using a decontaminated stainless steel hand auger.The grab samples will be composited
in a decontaminated stainless steel bowl and the composited sample will be placed in the
sample container(s). The stockpile sample(s) will be submitted for analysis of SVOCs
according to EPA 8270.The grab stockpile soil sample with the highest PID reading will
also be submitted for analysis of VOCs according to EPA Method 8260.The VOC and
SVOC analyses discussed above are anticipated to be required by the disposal facility;
however, additional analyses might be required by the selected disposal facility for
acceptance of the material.
The soil samples will be placed in an ice-chilled cooler and shipped with appropriate
chain-of-custody records via overnight delivery, or hand-delivered,to a North Carolina-
accredited analytical laboratory for the specified analysis(es).
2.5.Soil Management Provisions
Potentially-contaminated soil encountered during subsurface activities shall be segregated
and temporarily stored on Site in accordance with Figure C-1.Stockpiled soil shall be
placed on plastic sheeting and securely covered with plastic sheeting that is surrounded
by hay bales or another erosion control device pending a determination by the Owner
regarding proper disposal.The potentially-contaminated soil will be stockpiled within a
secure area designated by the Owner or its representative, as appropriate in order to
determine disposal options.
Upon completion of segregation and stockpiling of potentially-contaminated soil, clearance
to continue work in the affected area(s) shall be obtained from the Owner in consultation
with the environmental professional.
Environmental Contingency Plan for Subsurface Activities May 9, 2016
Atherton Mill, Charlotte, North Carolina
Amec Foster Wheeler Project 6228-12-0051
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The environmental professional will consult with the Owner to make the determination as
to the proper disposal method for the contaminated soil, select the permitted disposal
facility(ies) and execute required regulatory documentation as generator of the waste.
Upon completion of any corrective action, proper clearance to continue work in the
affected area(s) shall be obtained from the Owner in consultation with the environmental
professional.
Environmental Contingency Plan for Subsurface Activities May 9, 2016
Atherton Mill, Charlotte, North Carolina
Amec Foster Wheeler Project 6228-12-0051
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3.REPORTING
Within 45 days of receipt of contaminated soil waste disposal manifests and completion of
the work phase involving implementation of this ECP, a written report will be submitted to
NCDEQ. The report will include activities related to this ECP performed during a distinct
phase of subsurface activities at the Site. The report will contain a description of the field
screening activities, results of field screening activities, soil sampling activities, and a
description of the contaminated soil management. Deficiencies that NCDEQ identifies in
writing concerning the report or in the plan’s implementation will be corrected and the
report will be resubmitted to NCDEQ.NCDEQ will provide a written acceptance of the
report.
If this ECP is not implemented during subsurface activities at the Site, a report will not be
produced.
Environmental Contingency Plan for Subsurface Activities May 9, 2016
Atherton Mill, Charlotte, North Carolina
Amec Foster Wheeler Project 6228-12-0051
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