Former ravine SMWP Addendum Two Final 12-14-2012

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December 14, 2012
Former Ravine Area Addendum Two to the

SOILS MANAGEMENT WORK PLAN

SOUTHSIDE EAST REDEVELOPMENT PROJECT
(FORMER ROLLING HILLS SITE)
BROWNFIELDS PROJECT #:
URS – NORTH CAROLINA PROJECT NO. 38854599
December 14, 2012

A. Overview

Approximately 22,000 tons of soil has been removed from the former ravine at Southside
East. Visual inspections have demonstrated a portion is dominantly building rubble, and
the remaining portion of the ravine materials is almost entirely rubble free.

Polyaromatic hydrocarbon (PAH) and lead contamination is present in both portions of
the former ravine’s materials. Prior testing has shown that asbestos-containing materials
(ACMs) are present in portions of the building rubble, and conversely, no evidence of
suspect ACMs has been observed in the non-rubble portion.

Construction and financing schedule requirements requires that the ravine be cleared of
the building rubble, PAH, and lead impacted materials that yet remain within the ravine.
By temporarily stockpiling these materials on-site, construction can proceed and the
stockpiled materials subsequently managed in a more time-efficient fashion.

Design Modification

Building rubble and soils within the former ravine at Southside East are impacted by:

 asbestos,
 wood tar creosote, and
 lead.

Testing has demonstrated that ravine materials consisting predominantly of building
rubble may contain non-friable or friable asbestos. This building rubble is present in
known pockets, and additional rubble could be uncovered during grading operations.
Soils interstitial and adjacent to these pockets of building rubble are also contaminated
with wood tar creosote and lead. Underlying this complex mixture of building rubble and
impacted soils are uncontaminated native soils, partially weathered bedrock and bedrock.

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December 14, 2012

It should be noted a forensic review of the PAHs present in the Southside East former
ravine (correspondence from Rich Lesser to Mark Poindexter of NCDENR, February 22,
2012) concluded that chemical signatures were “consistent with construction material
burned prior to burial, producing wood-tar creosote with polycyclic aromatic
hydrocarbons”. Importantly, there is no evidence of wood preservatives in this material,
either as wood or coal tars, inorganic preservatives such as copper-chromate-arsenate,
chlorinated phenols, or listed hazardous wastes such as K001, K035, F027, F032, F034,
and F035, or D-characteristic wastes.

Due to the presence of asbestos, wood tar creosote and lead, this Memorandum identifies
requirements for all contractors working within the former ravine and at the stockpiling
area at Southside East.

Specific Requirements

 This Addendum envelopes the entire ravine area initially defined in the Soil
Management Work Plan as approved by North Carolina and also the stockpile
area shown in Figure 1 (attached).
 Training will be conducted for DH Griffin operators, focusing on the visual
appearance of materials to be relocated, as follows:
 building rubble observed or suspected to contain asbestos,
 soils presumed contaminated with wood tar creosote and lead, and
 natural soils and bedrock
 Regulated asbestos areas will be defined with red barrier tape. Work within these
areas will be conducted as follows:
o Workers within these areas are properly accredited and utilize the
approved PPE whenever heavy equipment is engaged. This requirement is
in effect, unless removed, in writing, by a NC accredited asbestos
designer.
o As contained within the SMWP and Addendum One, an accredited
asbestos inspector/air monitor (URS/Herrick Engineering) will be present
during site operations. This inspector will conduct perimeter air
monitoring for this regulated area.
o DH Griffin will provide a second accredited inspector/air monitor to
conduct personnel asbestos exposure sampling for their employees during
work in these regulated areas.
 Visual inspections may identify additional building rubble in areas not expected at
the start of ravine clearance.
o More than trivial amounts (> 10%) of brick, concrete, rebar, etc. will be
the criterion for classifying the material as building rubble potentially with
regulated asbestos.

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December 14, 2012
o Visually identified suspect asbestos containing materials will also be
classified as regulated for asbestos.
o Identification of natural soils and bedrock need corroboration with
sampling and analysis for wood tar creosote and lead.
 DH Griffin operators will not manage any newly discovered building rubble
unless approved by URS. If, at any time, suspect ACMs are observed during
excavation or other grading activities, work will be stopped until the accredited
project designer can review the situation and recommend a course of action.
 Based on the URS visual identification, DH Griffin will segregate these materials
for temporary stockpiling on-site as follows:
o At the location shown in Figure 1, a liner such as 8 mil Griffolyn TX-1200
(or an equivalent) will be placed on the existing soil to provide a secure
separation for underlying uncontaminated soil.
o Ravine materials will be transferred to the lined location for temporary
stockpiling.
o Ravine materials will be placed in a manner to minimize or eliminate
storm water runoff.
o A soil/earthen berm will be installed in a fashion to collect stormwater
coming from the storage pile.
o Any required stormwater permits or permit modifications will be obtained
prior to stockpile construction.
o Building rubble with potential asbestos will be handled as follows:
 The regulated asbestos stockpile will be marked with red tape and
applicable signage as required by asbestos regulations.
 The building rubble stockpile will be covered at the end of each
work shift using Griffolyn TX-1200 (or an equivalent).
 The stockpile cover will be weighted to prevent wind-blown
removal.
 The asbestos stockpile cover can be removed at the start of the next
workday, replacing it with the same plastic at the end of the next
shift, thus providing a secure cover during times when the project
site is unoccupied.
 Perimeter airborne asbestos monitoring for this location will be
conducted in addition to airborne asbestos monitoring at the point
of excavation.
 Appropriate dust control measures will be employed to prevent the
release of potential asbestos fibers.
 The rubble-asbestos stockpile should be removed as soon as
practicable after the ravine has been cleared.
o Soils contaminated with wood tar creosote and lead will be handled as
follows:
 The contaminated soil stockpile will periodically be covered using
Griffolyn TX-1200 or an equivalent.

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December 14, 2012
 No more than approximately 500 cubic yards of contaminated soil
may be exposed at the end of any work shift. Once approximately
500 cubic yards of soils have been stockpiled, the materials will be
covered using Griffolyn TX-1200 or an equivalent and maintained
until a determination of final stockpile disposition has been made.
 The stockpile cover will be weighted to prevent wind-blown
removal.
 After visual identification of native, likely uncontaminated materials, URS will
obtain samples of suspected clean materials for analysis of PAHs (by 8270 SIM)
and lead.
o A five-point homogenized composite sample will be obtained for each
approximate ½ acre of contiguous likely uncontaminated materials.
o If the five-point homogenized composite sample yields results less than
the NCDENR residential PSRGs for PAHs and lead, then these materials
need not be covered with a witness barrier prior to start of construction in
the cleared area.
 The purpose of the segregation of the soil into asbestos-containing material and
non-asbestos containing material is to minimize the volume that has to is handled
by asbestos accredited workers. Once the segregation is complete, the only
additional task for the accredited workers will be the transportation of the asbestos
waste to the Republic landfill in Virginia. Once this is completed there will be no
further need for accredited workers, operators or drivers.

Richard Lesser, CHMM
Slosky & Company, Inc.

Mike Fulkerson
URS Corporation

Kevin Arnold, PG
URS Corporation

Robert Herrick, PE, CIH
Herrick Engineering, Inc.