Former ravine SMWP Addendum Final - Southside East 1-30-2012

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October 9, 2012
Former Ravine Area Addendum to the

SOILS MANAGEMENT WORK PLAN

SOUTHSIDE EAST REDEVELOPMENT PROJECT
(FORMER ROLLING HILLS SITE)
BROWNFIELDS PROJECT #:
URS – NORTH CAROLINA PROJECT NO. 38854599
October 9, 2012

A. Overview

Approximately 22,000 tons of soil has been removed from the former ravine at Southside
East. Visual inspections have demonstrated that this soil is almost entirely rubble free. No
evidence of suspect Asbestos-containing Materials (ACM) has been observed.
Construction rubble (such as bricks, concrete, and rebar) has been observed only
occasionally and sporadically. No visual or olfactory evidence of chemical contamination
has been observed; although, prior testing showed impacts by polyaromatic hydrocarbons
and lead above residential action levels.

Observations during site characterization efforts in 2011 observed portions within the
former ravine consisting almost entirely of construction rubble. This rubble was located
at deep depths within the former ravine. The ongoing grading operation suggests that
these areas of construction rubble may exist as pockets, rather than as a continuous layer,
and may exist deeper beneath the construction envelope so that it has not been, and likely
will not be, intersected during construction.

Approximately 4,000 cubic yards of materials requiring management yet remain within
the former ravine footprint.

Design Modification

To better manage this soil material, the following steps will be taken:

1. The approximate 4,000 cubic yards of material will be excavated as originally
planned and evaluated for the presence or absence of suspect asbestos-containing
material, rubble, and visual/olfactory evidence of chemical contamination. The
continuous visual inspection will be performed during truck loading and off-
loading (if performed), and during blading and grading.

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October 9, 2012
2. The no visible emissions criteria and air monitoring required as stated in the
asbestos design will continue without change, even if suspect ACM or > 10 %
rubble is not identified.

3. Two North Carolina Accredited Asbestos Inspectors will be present during
management of the approximate 4,000 cubic yards of material. The materials will
be visually inspected continuously during the grading operation, and the decision
criteria applied in the field will be:
a. Any suspect asbestos-containing materials, and their co-located soils, will
be shipped offsite for disposal as asbestos-containing materials.
b. Inspectors must completely agree in their determination of material rubble
determination. An individual inspector may determine the material
contains greater than or equal to 10% by volume rubble and suspect ACM
in which case the material is disposed of in accordance with the SMWP.
c. Soil with rubble exceeding 10% in volume using visual estimates by the
accredited asbestos inspectors will be shipped offsite for disposal as
asbestos-containing materials.
d. Soil without suspect asbestos-containing materials and rubble less than
10% in volume using visual estimates by an accredited asbestos inspector
will be evaluated for chemical contamination.
e. Soil with visual or olfactory evidence of chemical contamination will be
shipped offsite for disposal as asbestos-containing materials under the
existing waste profile to Republic Landfill.
f. Soils that do not, by visual examination, conform with the existing waste
profile to Republic Landfill will be segregated for further evaluation.
g. Soils will be screened using a field OVM/HNU (or equivalent) organic
vapor detector using an aluminum foil covered jar or plastic Ziploc
bag. Testing frequency will be at least one sample per approximately 100
cubic yards of soil materials. Measurements exceeding 10 parts per
million (ppm) in the headspace will prompt shipment offsite of that
material under the existing waste profile to Republic Landfill.
4. Soils that are free of suspect asbestos-containing materials, have rubble less than
10%, show no visual or olfactory evidence or chemical contamination, and exhibit
headspace readings of less than 10 ppm may be used as geotechnically engineered
fill beneath a witness barrier within the defined footprint of the former ravine at
Southside East.
5. Soils placed as described above, as well as other soils already designated as
contaminated in the Soil Management Work Plan, will be covered with a witness
barrier as originally specified and at least two feet of clean soil.

Mike Fulkerson, URS, Inc.
Robert Herrick, PE, CIH, Herrick Engineering, Inc.
Richard Lesser, CHMM, Slosky & Company, Inc.