Carter G Woodson signed EMP-OCR

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Email: [e-mail]
Other DENR Program Contacts (if applicable, i.e., UST Section, Inactive Hazardous Site Branch,
Hazardous Waste, Solid Waste): Click i1er·e l'J enter te;:t.
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:
Construction or grading start:
Within 10 days_181
Within 10 days 181
Discovery of stained soil, odors, USTs, buried drums or waste, landfill, or other signs of previously
unknown contamination: Within 48 hours 181
Implementation of emergency actions (e.g. dewatering, flood, or soil erosion control
measures in area of contamination, venting of explosive environments):
Within 48 hours 181
Installation of mitigation systems: Within 10 days 181
Other notifications as required by local, state or federal agencies to implement
redevelopment activities: (as applicable): Within 30 days 181
REDEVELOPMENT PLANS
1) Type of Redevelopment (check all that apply):
D Residential D Recreational ~ Institutional D Commercial D Office ORetail D Industrial
~ Other specify: Educational facilities
2) Summary of Redevelopment Plans (attach conceptual or detailed plans as available):
a) Do plans include demolition of structure(s)?: D Yes 181 No D Unknown
b) Do plans include removal of building foundation slab(s) or pavement:
D Yes ~ No D Unknown
c) Provide brief summary of redevelopment plans, including demolition, removal of building
slabs/pavement and other structures: Near term redevelopment plans are limited to a
cafeteria/auditorium addition to the middle school building. A building plan for the
cafeteria/auditorium complex addition to the middle school is shown in Attachment 1. No
building demolition or removal of slabs or pavement will required for the middle school
add"rtion. The information in this EMP pertains to the cafeteria/auditorium middle school
addition only, unless noted otherwise. Longer term expansion of the school complex, for
which planning and scheduling have not been completed, Includes construction of the the
New BasebaH Field, New Soccer Field and Track, New Apartment and School Health Services
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EMP Form ver.1, October 23, 2014
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Complex, and the Mother WIT Parent Center. A site conceptual plan for those additions is
shown in Attachment 2.
3) Which category of risk-based screening level is used or is anticipated to be specified in the
Brownfields Agreement?
l&1 Residential D 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):
Prospective Developer is currently seeking to refinance the property and obtain construction
financing for the first phase of school improvements (cafeteria). Refinancing of the property
should occur in the second quarter of 2015. Prospective Developer would prefer to complete
construction financing and refinancing of the property at the same time; however, refinancing
will save the Prospective Developer approximately $7,700/month in reduced interest expense,
so it needs to be accomplished as soon as possible and financing may be bifurcated. If not
completed during the refinancing process, construction financing will be sought immediately
after refinancing of the property is complete and such financing is expected to be obtained
(assuming brownfields progress) by the latter half of 2015. Construction will begin after
construction financing is obtained.
Click here to enter te;(t.
b) If applicable, Phase 2 start date and anticipated duration (specify activities during each
phase):
longer term expansion of the school complex includes construction of new athletic fields,
New Apartment and School Health Services Complex, and the Mother WIT Parent Center.
Scheduling for these expansions has not been scheduled.
c) Additional phases planned? If yes, specify activities if known:
l&1 Yes D No D Not in the foreseeable future l&IDecision pending
d) Provide the planned date of occupancy for new buildings: Construction scheduling and
resulting occupancy dates have not been determined and are dependent on brownflelds
progress and project financing.
I CONTAMINATED MEDIA I
Contaminated Media (attach tabulated data summaries for each impacted media and figure(s) with
sample locations):
Part 1. Soil: 0 Yes l&1 No 0 suspected
Part 2. Groundwater:
Part 3. SUrface Water:
Part 4. Sediment:
l&1 Yes 0 No 0 suspected
181 Yes 0 No 0 Suspected
D Yes D No l&1 Suspected
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EMP Form ver.1, October 23, 2014
Part 5. Soil Vapor:
Part 6. Sub-Slab Soil Vapor:
Part 7. Indoor Air:
~ Yes 0 No ~ Suspected
~ Yes 0 No 0 Suspected
0 Yes ~ No 0 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): No contaminants have been
detected in voe and inorganic soil sampling on the property and in the area of the middle school
expansion. Sampling in the middle school expansion area has been conducted during three separate
assessments.
2) Depth of known or suspected contaminants (feet): none
3) Area of soil disturbed by redevelopment (square feet): The cafeteria/auditorium building
footprint will be approximately 6000 square feet. The soil area to be disturbed will be approximately
7000 square feet. Soil will be graded only to provide a level surface for the building slab and sub-
slab soil venting layer.
4) Depths of soil to be excavated (feet): Less than approximately 4 feet.
5) Estimated volume of soil (cubic yards) to be excavated (attach grading plan): Approximately
28,000 cubic feet (103.7 cubic yards). Grading plan has not been developed.
6) Estimated volume of excavated soil (cubic yards) anticipated to be impacted by contaminants:
None.
7) Estimated volume of contaminated soil expected to be disposed of offsite, if applicable: None.
IMPORTED Fill SOIL
1) Will fill soil be imported to the site? 0 Yes 181 No D Unknown
2) If yes, what is the estimated volume of fill soil to be imported? none
3) If yes, what is the depth of fill soil to be used at the property? none
If a range of depths, please list the range.
4) PRIOR TO ITS PLACEMENT AT THE BROWNFIEWS PROPERTY, provide plan to analyze fill soil to
demonstrate that it meets acceptable standards and can be considered clean for use at the
Brownfiefds property (Check all that apply}:
0 Volatile organic compounds (VOCs) by EPA Method 8260
0 Semi-volatile organic compounds (SVOCs) by EPA Method 8270
0 Metals RCRA List (8) (arsenic, barium, cadmium, chromium (speciated), mercury, lead,
selenium and silver)
0 Metals -Hazardous Substance Ust -14 (antimony, arsenic, beryllium, cadmium, chromium
(spedated according to IHSB protocol), copper, lead, manganese, mercury, nickel, selenium, silver,
thallium, and zinc)
0 Metals-EPA Priority Pollutant List -13 (arsenic, beryllium, cadmium, chromium {spedated
according to IHSB protocol), copper, mercury, nickel, lead, antimony, selenium, sliver, thaUium, and
zinc)
0 Other Constituents & Analytical Method: Click here to enter text.
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EMP Form ver.1, October 23, 2014
0 Metals RCRA List (8) (arsenic, barium, cadmium, chromium (speciated), mercury,
lead, selenium and silver)
0 Metals -Hazardous Substance List -14 (antimony, arsenic, beryllium, cadmium,
chromium (spedated according to IHSB protocol), copper, lead, manganese, mercury, nickel,
selenium, silver, thallium, and zinc)
D 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)
181 Other Constituent(s) & Analytical Method(s): Soils in the area of the new
auditorium/cafeteria addition to the middle school have been sampled for organic and inorganic
contamination. No contaminants have been identified in three separate sampling efforts. If odorous
or discolored soils are encountered by constructions crews, Mid-Atlantic staff will deploy to the site to
conduct soil assessment as needed, and DENR will be informed per the notifications section of this
plan.
181 Proposed Measures to Obtain Pre-Approval for Reuse of Impacted Soil within the
Brownfields Property Boundary
D Provide documentation of analytical report(s) to Brownfields Project Manager
D Provide documentation of final location, thickness and depth of relocated soil on
site map to Brownfields Project Manager once known
D Use geotextile to mark depth of fill material (provide description of material)
0 Manage soil under Impervious cap 0 or clean fill 0
Describe cap or fill: As needed (provide location diagram)
0 Confer with NC BF Project Manager if Brownfield Plat must be revised (or re-
recorded if actions are Post-Recordation).
181 Other: Actions needed as determined by Mid-Atlantic in conjunction with DENR
after on-site assessment, if potentially contaminated soil is encountered by construction crews.
181 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):
D Volatile organic compounds (VOCs) by EPA Method 8260
D Semi-volatile organic compounds (SVOCs) by EPA Method 8270
D Metals RCRA List (8) (arsenic, barium, cadmium, chromium (spedated}, mercury,
lead, selenium and silver)
D 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)
D Metals -EPA Priority Pollutant List -13 (arsenic, beryllium, cadmium, chromium
(spedated according to IHSB protocol), copper, mercury, nickel, lead, antimony, selenium, silver,
thallium, and zinc)
0 Pesticides
DPCBs
181 Other Constituents & Analytical Method: Actions needed as determined by Mid-
Atlantic in conjunction with DENR after on-site assessment, if potentially contaminated soil is
encountered by construction crews.
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EMP Form ver.1, October 23, 2014
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.
0 Transport and dispose of impacted soil offsite (documentation of final disposition must be sent to
Brownfields Project Manager)
0 landfill -analytical program determined by landfill
0 landfarm or other treatment facility Click h =•·e w 2nt2rte;'.c.
0 Use as Beneficial Fill Offsite-provide justification: Click here to ent2;· te:'t
0 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: Impacted soil will not be transported offsite.
MANAGEMENT OF UTILITY TRENCHES
0 Install liner between native impacted soils and base of utility trench before filling with clean fill
(Preferred)
0 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.
0 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 o No o
If no, include rationale here. No known contamination based on prior sampling events.
If yes, provide specifications on barrier materials
Other comments regarding managing impacted soil in utility trenches: Utility trenches are not
anticipated to encounter impacted soils. If construction crews encounter odorous or discolored soil
they will cease excavation activities and contact Mid-Atlantic so that Mid-Atlantic can assess
conditions on-site and direct additional actions. DENR will be notified of any additional actions per the
notifications section of this plan.
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? 11.9 feet or greater.
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EMP Form ver.1, October 23, 2014
ts groundwater known to be contaminated by 181onsite 0 offsite 0 both 0 or unknown
sources? Describe source(s): A cotton mill operated on the site from the late 1800's until the 1960's.
From 1970 until 1988 the mill building was used for circuit board manufacturing. Solvent
contamination is present in groundwater on the site. Off-site contamination from solvent reclamation
at a nearby site may have contributed to groundwater contamination as well.
What is the direction of groundwater flow at the Brownfields Property? Groundwater flow is to the
south-southwest
Will groundwater likely be encountered during planned redevelopment activities? 0 Yes 181 No
If yes, describe these activities: Groundwater depth is 12 feet or greater on the site. Excavation depth
for the cafeteria/auditorium addition to the middle school is not expected to exceed 4 feet.
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 depth on the site is 12 feet or greater. Excavation
depth is not expected to exceed 4 feet. However, if groundwater is encountered, construction crews
will cease excavation activities and contact Mid-Adantic so that Mid-Atlantic can assess conditions on-
site and direct additional actions. DENR will be informed per the notification section of this plan.
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: 181 Yes 0 No
Will workers or the public be in contact with surface water during planned redevelopment activities?
0 Yes 181 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): Surface water on the property is
in Parkway Branch near the property boundary of Tract 4. Parkway Branch runs along the south and
eastern border of the property and does not intersect any areas of planned construction. However, if
surface water is encountered, construction crews will cease excavation or grading activities and
contact Mid-Adantic so that Mid-Atlantic can assess conditions on-site and direct additional actions in
conjunction with DENR.
I PART 4. SEDIMENT -Please fiU out the information below.
Is sediment at the property known to be contaminated: 0 Yes 181 No
Will workers or the public be in contact with sediment during planned redevelopment activities?
0 Yes 181 No
If yes, attach a map showing location of known contaminated sediment at the property.
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EMP Form ver.l, October 23, 2014
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In the event that contaminated sediment is encountered during redevelopment activities, list
activities for management of such events (stream bed disturbance): Surface water on the property is
in Parkway Branch near the property boundary of Tract 4. Solvent contamination has been
documented in Parkway Branch; sediment contamination has not been documented. Parkway Branch
runs along the south and eastern border of the property and does not intersect any areas of planned
construction. If contaminated sediment is encountered during construction and excavation,
construction crews will cease excavation or grading activities and contact Mid-Atlantic so that Mid-
Atlantic can assess conditions on-site and direct additional actions in conjunction with DENR.
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:
Soil Vapor: 181 Yes 0 No 0 Unknown
Groundwater: 181 Yes 0 No 0 Unknown
IHSB Industrial/Commercial Screening Levels:
Soil Vapor: 0 Yes 181 No 0 Unknown
Groundwater: 181 Yes 0 No 0 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? Soil vapor was sampled
beneath the slab of the middle school building using horizontal boring methods at a reported
sampling depth of three feet. Soil vapor concentrations exceeded DENR DWM soil vapor screening
levels for residential environments.
Will workers encounter contaminated soil vapor during planned redevelopment activities?
181 Yes 0 No 0 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: Sub-
slab soil vapor samples indicated that vapor concentrations are considerably lower those that would
approach occupational exposure limits. However, if VOC vapor odors from soil gas are encountered
during construction, construction managers will cease excavation activities and contact Mid-Atlantic
so that Mid-Atlantic can assess conditions on-site and direct additional actions in conjunction with
DENR. In the unlikely event that soil vapor exposure is identified that might create unacceptable risk
for construction workers (i.e., concentrations that approach occupational exposure limits), a site
safety and health plan will be developed in conjunction with the construction contractor to limit
dermal and inhalation exposure for construction workers. The plan may indude engineerln&
administrative and personal protection measures for exposure control.
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EMP Form ver.1, October 23, 2014
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? 181 Yes D No D 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 0-6 inches 181 Other, If other
describe: Three foot depth beneath the building slab.
Will workers encounter contaminated sub-slab soil vapor during planned redevelopment activities?
181 Yes D No D Unknown
In the event that contaminated soil vapor is encountered during redevelopment activities, list
activities for management of such contact: Sub-slab soil vapor samples indicated that vapor
concentrations are considerably lower those that would approach occupational exposure limits.
However, if VOC vapor odors from soil gas are encountered during construction, construction
managers will cease excavation activities and contact Mid-Atlantic so that Mid-Atlantic can assess
conditions on-site and direct additional actions in conjunction with OENR. In the unlikely event that
soil vapor exposure is identified that might create unacceptable risk for construction workers (i.e.,
concentrations that approach occupational exposure limits), a site safety and health plan will be
developed in conjunction with the construction contractor to limit dermal and inhalation exposure for
construction workers. The plan may include engineering, administrative and personal protection
measures for exposure control.
PART 7. INDOOR AIR -Please fill out the information below •
Are indoor air data available for the Brownfields Property? 181 Yes 0 No D 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?
D Yes 181 No 0 Unknown
In the event that contaminated indoor air is encountered during redevelopment activities, list
activities for management of such contact: Indoor air sampling was conducted in the middle school in
In two sampling events in July and December 2014. Volatile organic compound concentrations In
indoor air were well below OENR DWM residential vapor intrusion screening levels in Indoor air
samples in both events.
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EMP Form ver.1, October 23, 2014
PART 8 -Vapor Mitigation System -Please fill out the information below •
Is a vapor intrusion mitigation system proposed for this Brownfields Property?
!&! Yes 0 No 0 Unknown
If yes, provide the date the plan was submitted to the Brownfields Program.
A vapor intrusion mitigation system (VIMS) is proposed for the auditorium/gymnasium
addition to the middle school, but the VIMS plan has not been developed. The VIMS plan will be
submitted to the Brownfields program for approval prior to the start of construction.
Attach the plan.
Has the vapor mitigation plan been approved by the NC Brownfields Program?
0 Yes !&! No 0 Unknown
Has the vapor mitigation plan been signed and sealed by a North Carolina professional engineer?
0 Yes !&! No
What are the components of the vapor intrusion mitigation system?
0 Sub-slab depressurization system
0 Sub-membrane depressurization system
0 Block-wall depressurization system
0 Drain tile depressurization system
!&! Passive mitigation methods
181 Vapor barriers
0 Perforated piping vented to exterior
0 Other method:
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:
0 Review of historic maps (Sanborn Maps, facility maps)
0 Conducting geophysical surveys to evaluate the location of suspect UST, fuel lines, utility lines, etc.
0 Interviews with employees/former employees/facility managers/neighbors
Notification to State Brownfields Project Manager, UST Section, Are 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.
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EMP Form ver.1, October 23, 2014
Attachment 1
Carter G. Woodson Middle School Project
Brownfields Environmental Management Plan
Middle School Addition Building Plan
Attachment 2
Carter G. Woodson Middle School Project
Brownfields Environmental Management Plan
Long Term Site Plan
Attachment 3
Carter G. Woodson Middle School Project
Brownfields Project Number 18032-14-034
Winston Salem NC
Environmental Management Plan, Part 9: Contingency Plan for Encountering Unknown Tanks Drums
or Other Waste Materials.
Construction crews must cease construction and excavation activities in the event unidentified tanks,
drums, fuel lines, landfilled waste or other unidentified waste materials are encountered during
excavation or construction. Mid-Atlantic Staff should be contacted for instructions prior to resuming
operations.
Mid-Atlantic Staff Contact Information:
During normal business hours {8:00 AM to 5:00 PM M-F): 919-250-9918
Caller should reference the "Moore Place Brownfields Project". Ask for William Service or Dan Nielsen.
Non-business hours, weekends and holidays, call William Service: 919-862-4489.
If unidentified waste material is encountered, Mid-Atlantic staff will deploy to the site to conduct an
assessment as needed, and will direct further operations.
When notified of an event on-site, Mid-Atlantic staff will, within 48 hours, contact Sharon Eckard, the
NCDENR Brownfields project manager, or other NCDENR Brownfields staff if Ms. Eckard is not available.
Attachment 4
Page 1
Hart and Hickman, Inc.
Phase II Environmental Site Assessment
May 16, 2014
Groundwater Monitoring Data Table
Page 2
El Group, Inc.,
Phase II Environmental Site Assessment
June 13, 2014
Groundwater Monitoring Data Table
Page 3
El Group, Inc.,
Phase II Environmental Site Assessment
June 13, 2014
Soil Vapor Sampling Data Table
Page4
El Group, Inc.,
Phase II Environmental Site Assessment
June 13, 2014
Surface Water Sampling Data Table
[ -Page 1 I
Table 1
Summary of Groundwater Analytical Data
OMS-156971 -Carter G. Woodson School
Winston-Salem, North Carolina
H&H Job No. BBT-118
Sample ID TMW-1 TMW-2 TMW-3 TMW-4
Sample Date 05/02/14 05/02/14 05/02/14 05/02/024
Units µg/L µg/L µg/L µg/L
voes (82608}
Tetrachloroethylene CPCE) <0.069 850 2.1 39
Trichloroethene (TCE) <0.054 6.9 <0.054 <0.054
cis-1,2-dichloroethvlene <0.076 17 <0.076 <0.076
Trichlorofluormethane <0.088 14 <0.088 <0.088
1, 1, 1-Trichloroethane <0.063 0.51 <0.063 <0.063
~
1) NCAC 02L Groundwater Quality Standards (April 2013)
2) Division of Waste Management Residential Vapor Intrusion Groundwater Screening Level (January 2014)
3) Division of Waste Management Non-Residential Vapor Intrusion Groundwater Screening Level (January 2014)
Only those compounds detected in at least one sample shown above
Bold indicates an exceedance of the 2L Groundwater Quality Standarc
Underlined indicates an exceedance of the Vapor Intrusion Screening Criteria
Method number follows parameter in parenthesis
voes = volatile organic compounds
µg/L = micrograms per liter
NS = screening criteria not specified
BRL = Constituent not detected at or above laboratory reporting limit
S:\AAA-Master Projeots\BB&T\BBT-118 Carter Woodson School (OMS156971 R1)\Task2 -Phase II ESA\Tablea\Analytlcal Da1a Tables 05-12-2014.xtsx
511612014
TMW-5
05/02/024
µg/L
25
<0.054
<0.076
<0.088
<0.063
2L Groundwater
Quality Standard'
µg/L
0.7
3
70
2,000
200
Screenina Criteria
DWM Residential DWM Non-Residential
Groundwater VI Groundwater VI
Screening Level2 Screening Level3
µg/L µg/L
11.5 48.4
1.04 4.35
NS NS
36.8 155
1,480 6,230
Table 1 (Page 1 of 1)
Hart & Hickman, PC
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TABLE2
Summary of Laboratory Analytical Results -Groundwater Quality
Carter G. Woodson School of Challenge
437 Goldfloss Street
Winston-Salem, NC
EI Project No.: ENM0140096.00
Sample Identification TMW-1 I TMW-2 I TMW-3
Sample Date 5/29/2014 I 5/29/2014 I 5/29/2014
15A NCAC 2L DWM Residential Vapor
I TMW-4
I 5/29/2014
Volatile Organic Compounds .0202 Intrusion Groundwater LABO RA TORY RES UL TS (ug/L) EPA Method 82608 Groundwater Screening Levels
Standards (ug/L) (GWSL) (ug/L)
Benzene 1 13.8 ND ND ND ND
Toluene 600 3,840 ND ND ND ND
Ethylbenzene 600 30.2 ND ND ND ND
Total Xvlenes (o,m,p) 500 98.5 ND ND ND ND
MTBE 20 3,900 ND ND ND ND
2-Butanone <MEK) 4,000 448,000 ND ND ND ND
Tetrachloroethylene (PCE) 0.7 11 .5 ND ND 2.30 40.00
Trichloroethvlene (TCE) 3 1.04 ND ND ND ND
Trichlorofluoromethane 2,000 36.8 ND ND ND 11.00
All Remaininq VOCs N/A N/A N/A N/A N/A N/A
15A NCAC 2L DWM Residential Vapor
Semi-Volatile Organic Compounds .0202 Intrusion Groundwater " LABO RA TORY RES UL TS (ug/L) EPA Method 8270C Groundwater Screening Levels
Standards (ug/L) (GWSL) (ug/L)
All Remaining SVOCs I N/A I N/A II N/A I N/A I N/A I N/A
N/A = Not Applicable ND = Not Detected NS = No Standard NA= Not Analyzed
ug/L= micrograms per liter, parts per billion (ppb)
Bold = exceedance in the 2L standard. Italics = exceedance in GWSLs.
I TMW-5 I I 5/29/2014 I
I
ND
ND
ND
ND
ND
ND
ND
ND
ND
N/A
I N/A I
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TABLE 4
Summary of Laboratory Analytical Results -Sub-Slab Vapors
Carter G. Woodson School of Challenge
437 Goldfloss Street
Winston-Salem, NC
EI Project No.: ENM0140096.00
Sample Identification I SSV-1 I SSV-2
Samele Date I 5/29/2014 I 5/29/2014
DWM Residential Vapor Intrusion Screening
Levels -January 2014
I SSV-3
I 5/29/2014
USEPA T0-15 LABORATORY RESULTS (ug/m3)
Sub Slab and Exterior Soil Gas Screening
Levels (SGSL) (ug/m')
Benzene 104 ND ND ND
Toluene 34,800 ND ND ND
Ethylbenzene 324 ND ND ND
Total Xvlenes (o,m,p) 695 ND ND ND
Acetone 216,000 36.00 23.00 50.00
Propylene 20,900 18.00 ND 28.00
Ethanol NS ND ND 33.00
2-Butanone (MEK) 34,800 ND ND 15.00
Tetrachloroethvlene (PCE) 278 140.00 1500.00 46.00
Trichloroethylene (TCE) 13.9 ND ND ND
Trichlorofluoromethane 4,870 ND 1100.00 2000.00
All Remaining VOCs N/A N/A N/A N/A
N/A = Not Applicable ND = Not Detected NS = No Standard NA = Not Analyzed
ug/m•= micrograms per meter cubed
Bold = exceedance in the SGSL standard.
I I
Figure 1
Drawing Showing Middle School Addition and
Locations of Monitoring Wells, Soil Vapor Sampling Points,
and Surface Water Sampling Points with Exceedances