DESCRIPTION:
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Notified MDEQ, within required
time constraints that tanks were going to be removed. Contacted
MISS DIG to demarcate site for all utilities. Cordoned off work
area to prevent access by general public. Prepared HASP
specific for site. Using records from MDEQ UST list and fire
department drawings and other available site diagrams, marked
out location of tanks and piping. Directed contractor to blow
back piping lines into tanks prior to removal to minimize
potential for release Directed contractor to pump out tanks,
transport material and properly dispose. Directed contractor to
remove asphalt and properly dispose. Directed contractor to
remove tanks, piping, and dispensers and islands. Observed
liquid in excavation (tanks and piping had leaked). Directed
contractor to pump out petroleum ladened water from excavation,
transport and dispose. Directed contractor to excavate
overburden soils, transport and properly dispose. Manifested
all materials leaving site. Collected floor samples at each end
of cavity where each former tank had lain. Collected samples for
analysis via SW 846 for extended BTEX parameters for gasoline,
PNAs for diesel fuels, and lead chromium and cadmium. Preserved
samples with methanol via method 5035 for VOC analysis. (No
liquid or water in excavation cavity; only soil samples
collected). Maintained samples at <4 degrees C in cooler to
maintain integrity. Submitted samples, under chain of custody,
with trip blank, to independent qualified laboratory for
analysis. Concentrations of contaminants exceeded laboratory’s
method detection limits as well as MDEQ’s Residential Criteria.
Backfilled excavation with clean sand. At client’s request,
covered soils with gravel layer. Prepared and provided to
client, Notification of Confirmed Release for submittal to
MDEQ. Prepared and provided to client Amended Tank Registration
documents for submittal to MDEQ to notify State that tanks were
removed from ground. Informed client that he had a release and
that a Closure of the release by a Qualified Consultant would be
required. |