Refinery Property. In 1913, Amoco started working adjacent to the Midwest and Franco
properties. Finally, Midwest Oil Company took management of Franco and by 1928, Midwest was
purchased by and built-in into Amoco. The former Amoco Refinery operated till 1991 and
in 1998 Amoco Corporation merged with British Petroleum to turn into BP Company North
America Inc., hereinafter referred to as BP.

The early process units at the refinery consisted of mainly batch and coke stills that separated
crude oil into useable products. Other batch processes produced and handled lube oils and
completed waxes, and removed sulfur odor from gasoline. These items and processes along with
boiler homes, pump homes, and the railroad car loading facility, constituted the majority of the early
operations. Within the late 1940, a fluid catalytic cracking unit was constructed, adopted within the mid-
1950s by the ultraformer and alkylation units. The pipestill, central boiler house and lube
refining units had been constructed within the early 1960s and were repeatedly upgraded as new
technologies developed. On the peak of production (circa 1987) the previous refinery processed
an average of roughly 48,000 barrels of oil per day. In its last year in operation, output
from the previous refinery included: fuel gasoline (1450 barrels per day (BPD)); liquid propane gas
(300 BPD); motor/aviation gasoline (14,seven hundred BPD); fluid cracking unit coke (780 BPD); heavy
fuel oil (400 BPD); kerosene and distillates (eleven,300 BPD); asphalt (500 BPD) and residuum
(1800 BPD).

Hydrocarbon and metals contamination from refinery operations has been identified within the soils
and groundwater in and round the previous refinery. Twelve models have been recognized where
past wastes were managed, and there are a further fifteen areas recognized where
environmental impacts could also be present. The closest natural water physique is the North Platte River,
which bisects the north and south properties. The former refinery additionally discharged process water
to the Soda Lake inlet basin from 1957 by way of 1990. Soda Lake is positioned 2 to 3 miles
northeast of the Refinery Property.

BP regulatory historical past at the previous Amoco Refinery in Casper, Wyoming began in 1980 when
BP submitted a RCRA Half A permit application designating the property as an interim standing
facility below federal hazardous waste facility laws with the EPA. In 1998, the WDEQ assumed
the accountability for requiring BP to maneuver forward with corrective motion at the site. A
collaborative process was used to make investigation, risk assessment and cleanup selections for
the positioning. This collaborative process allowed the native authorities, the WDEQ and BP to have
open technical discussions and required the WDEQ to make corrective action choices in
consideration of public feedback. This also provided a forum for each occasion to understand and
tackle every other issues and specific wants throughout every step of the corrective motion
process, quite than WDEQ and BP reaching decisions and presenting them for public assessment
and remark after the fact.

In January 2002, the WDEQ and BP signed a Remedy Agreement after reaching cleanup
agreements with community buy in and assist. The Treatment Agreement contains treatment
selections developed for three separate areas; Treatment Determination #1 South Properties Space
(which incorporates the Refinery Property); Treatment Resolution #2 North Properties Area and the
North Platte River; and Remedy Determination #3 Soda Lake Space.

The remedy selections outline the cleanup requirements for every of the properties intimately;
highlights include:

Set up of a six thousand foot lengthy steel sheet pile (subsurface) barrier wall and
hydraulic effectively system to contain and remove subsurface contaminants that had the
potential to migrate and impact the North Platte River;
Source Removal including elimination of the subsurface pipe, waste models, soils which have the
potential to influence groundwater, and removal of free phase hydrocarbons from
Elimination of contaminated soils that exceed threat-primarily based standards protective of site customers
and animals;
Building of a Corrective Action Administration Unit (CAMU) as a permanent
engineered containment system for remediation wastes;
An elaborate groundwater restoration system including a water therapy system that
uses wetlands to take away contaminants; and
A demonstration venture designed to increase the probability that a know-how suitable for
remediation of localized persistent source areas might be accessible in the event the
remedies chosen don’t carry out according the performance standards.

Since signing the Treatment Agreement, the WDEQ and BP have continued to collaborate on
design, operation, monitoring and upkeep work plans and completion experiences required by
the treatment selections utilizing a work group concept developed while doing the formal
collaborative process. The oversight work group has met repeatedly to discuss and resolve
technical points.

In 2000, BP was the first facility accepted into WDEQ Voluntary Remediation Program (VRP).
Participating in the VRP allows volunteers to obtain legal responsibility assurances akin to a 鈥榗ovenant not
to suefrom the WDEQ, and in addition permits the WDEQ to think about future land use when making
cleanup decisions with the proviso that the native authorities is prepared to institutionalize the
property as a Use Management Space (UCA). A UCA is an institutional management developed below
WDEQ VRP law that restricts the future use of a property. Town of Casper and Natrona
County have been willing to designate BP properties as part of a UCA, giving the WDEQ the
flexibility to think about a cleanup based mostly on danger to industrial/industrial and recreational customers of
the property. The treatment choices also mandate other institutional controls in order to stop
publicity to subsurface soils (throughout cleanup) in areas (Soil Administration Overlay District) that
exceed risk primarily based standards and to stop water use (Groundwater Use Restriction Area) till
the groundwater meets drinking water standards.

All through the corrective action course of and at any time when possible, BP has built-in cleanup
programs and remediation necessities with reuse. Examples of this integration is a kayak course
in the North Platte River that bolsters the hydraulic containment system on the Refinery
Property, building of wetlands and remedy ponds as water options on an 18 hole golf
course, and property improvement in the Platte River Commons and Salt Creek Business Park.

Remediation activities have been initiated and completed within the North Properties Area, South
Properties Space and in the Soda Lake Area. A few of these actions embody the set up of
the barrier wall and operation of the groundwater elimination system alongside the wall (to ensure
hydraulic gradient and stop releases to the river from the South Properties Area), removal of
source supplies together with subsurface pipe, waste items, and contaminated soil, building of
the CAMU, operation of the groundwater restoration system and completion of the
demonstration challenge (use of surfactants to focus on localized supply areas).


In the North Properties Area, the only pending remedial implementation exercise is the
implementation of a biosparge remedy system situated within the Japanese Terrace. The
implementation of the biosparge system is on hold pending an analysis of its
effectiveness. The analysis and path ahead proposal will be completed in 2014.
Within the South Properties Area, there are several pending remedial activities. The
building of a Passive Bioventing system and two protecting barrier zones are nonetheless
being mentioned between BP and the WDEQ. These discussions will lead to an
implementation of an efficient remedial various that can ensure residual hydrocarbon
targets are met in a well timed manner.
Within the Soda Lake Area all remedial actions have been constructed.

Environmental Indicators (EIs) are an EPA measure used to find out if contamination is being
mitigated at or from facilities. RCRA authorized States, reminiscent of Wyoming, make the
willpower whether a facility has met the EIs, and that data is reported to EPA.