During the winter of 1998/1999, ConocoPhillips Alaska, Inc. (CPAI) initiated construction of
the Alpine Facility (CD1 and CD2) in the Colville River Delta (CRD). Alpine operations
expanded with implementation of the Alpine Satellite Development Plan (ASDP) during the
2004/2005 winter season. Construction included placement of gravel facilities for two new
satellite drill sites, CD3 and CD4. The CD3 pad development included an airstrip and
pad/airstrip access road, apron, and taxiway. The CD4 pad development included an access
road running parallel to the existing Alpine Sales Pipeline, connecting to the CD2 access road.
Beginning in 2007, three lakes near CD3 and CD4 facilities have been monitored annually to
comply with North Slope Borough Ordinance Serial No. 75-6-46, Stipulation IV.2.4.3(h). The
three sampling lakes are M9313 near CD3, and L9323 and L9324 located north and south of
CD4, respectively. The 2010 monitoring marks the fourth continuous year of annual water
quality monitoring. An overview of the three study lakes relative to Alpine facilities is
presented in Figure 1.1
The water quality monitoring program for the lakes included in situ field sampling of
temperature, dissolved oxygen (DO), salinity, conductivity/specific conductance, and
turbidity. Additional water samples were collected for laboratory analysis of dissolved
hydrocarbons--diesel range organics (DRO), residual range organics (RRO) and Resource
Conservation and Recovery Act (RCRA) 8 metals. The laboratory analyses were chosen to
identify and monitor the persistence of trace concentrations originally observed in 2007.
This report presents the field investigation procedures, sampling, and analytical methods as
well as the resulting water quality data and analyses. Field sampling was performed on July
31, 2010. Laboratory analyses identified targeted constituent concentrations well below state
and federal recommended water quality criteria and standards. Table 1.1 summarizes the
field and laboratory sampling parameters for the three lakes included in the 2010 program.
