HomeMy WebLinkAboutLINCOLN EAST CONVENIENCE CENTER PUD (DIAMOND SHAMROCK) - PRELIMINARY - 40-94D - SUBMITTAL DOCUMENTS - ROUND 1 - HAZMATS` • s
pressurizing (positive or negative) during filling
procedures or due to thermal contraction/expansion of
product.
(8) Submersible pump leak detector to shut down pump if
detector suspects a leak in the primary piping system.
(9) Monitor walls in the tank area to monitor for
contaminants in the soil and/or groundwater.
(10) Emergency stop switch at cashier's counter to shut down
entire fueling operation in the event of a spill or fire.
Fuel is delivered to the underground tanks by tanker. Each
truck holds approximately 8,000 - 10,000 gallons. The most likely
route the transport truck would travel would be along Lincoln
Avenue to the site from the west. The truck would leave the site
via Lemay Avenue.
Some of the most realistic scenarios involving use of gasoline
at this facility include:
(1) A spill at the dispenser due to consumer lack of
attention or mechanical failure. This spill would be
minimal based on a two minute response and a flow rate of
ten gallons per minute. Twenty gallons of gasoline
probably would not travel off site and could be
controlled by spreading an absorbing material and
evaporation.
(2) A larger surface spill originating at the underground
storage tank area during a product delivery. Fuel is
"dropped" into the underground storage tank by gravity
fill. The most likely scenario would be the delivery
hose becoming disengaged from the truck or tank
connection. Since the truck driver is required by law to
stay within sight of and within control of the delivery
operation, a spill should not exceed a quantity of
approximately 250 gallons. In the event of this type of
spill, the fuel would travel to the southwest corner of
the site. The fuel would stay within paved areas
contained by site curbing. The outlet for storm water in
this corner is a drainage inlet that flows to the
detention pond along the south property line. It would
be possible for the driver to dam this inlet opening and
contain the spill within the paved drive areas of the
site. The contained fuel could then be properly cleaned
up and disposed of under the supervision of the fire
department.
P:\CORR=S\-�T_TYV--NDS\DOI7\HAZMATT.96
The proposed development is a Diamond Shamrock Cornerstore
with automatic car wash and gasoline sales. It is located at the
northeast corner of Lemay Avenue and Lincoln Avenue in the City of
Fort Collins. The soil in this area is clay or silty sand on the
surface and groundwater is about 3 to 4 1/2 feet below the surface
at the time of the soil boring (July 1994).
The adjacent property to the east and north is currently
agricultural and/or undeveloped. These properties are zoned IL for
future industrial. The properties to the west across Lemay Avenue
and to the south across Lincoln Avenue are zoned commercial and
currently are undeveloped.
The hazardous material utilized by this operation is diesel
fuel and unleaded gasoline. There will be one 15,000, one 12,000,
and one 8,000 underground doublewall fiberglass storage tanks. The
storage and distribution system complies with the State of Colorado
requirements regulating service stations. The distribution system
contains the following safety features:
(1) Multiple product dispensers with:
(a) Automatic nozzles to prevent customer overfill and
spillage.
(b) Hose break -away connections that separate and seal
the hose opening when customers drive off with the
nozzle still in the vehicle.
(c) Emergency shut-off valves under the dispenser that
shut off gasoline flow into the dispenser when
either:
(1) The dispenser sustains and impact and the
emergency valve shears away, or
(2) A fire melts a fusible link connection on the
valve.
(2) Dispenser containment sumps to collect any fuel spillage
under the dispenser and prevent soil contamination.
(3) Doublewall fiberglass piping to contain fuel in the event
of a primary piping failure.
(4) Submersible pump containment sumps to contain any fuel
leaking from the pump or piping connections.
(5) Float vent valves in tanks to prevent tank overfill by
truck transport driver.
(6) Cathodic protection system consisting of tank coating and
anodes for any fuel tank steel appurtenances.
(7) Pressure/vacuum vent valves to prevent tanks from over
Q
Hazardous Materials Impact Analysis
for
Diamond Shamrock
Lincoln East, PUD
NEC Lemay Ave. @ Lincoln Ave.
City of Fort Collins, Colorado
August 1996
Prepared for:
Diamond Shamrock Inc.
520 E. 56th Avenue
Denver, CO 80216
(303) 297-9777
Attn: Rick Gipson
Prepared by:
Galloway, Romero & Associates
14202 E. Evans Avenue
Aurora, CO 80014
(303) 745-7448
Attn: David L. Jones