REP45592

• Permit No: C1992081
• IBM Index Class Name: Report
• Doc Date: 2/18/2003
• Doc Name: 2002 Annual Hydrology Report
• From: Montgomery Watson Harza
• To: DMG
• Annual Report Year: 2002
• Permit Index Doc Type: Hydrology Report
• Media Type: D
• Archive: No

February 2003 Hayders Gu46 Terminal, Inc. * Hayden Gukh Laadout - 2002 Annual Hydrology Repair 1 Page 3
3.0 HYDROLOGIC MONITORING
3.1 SAMPLING AND MEASURING TECHNIQUES
Field conductivity and pH meters were calibrated prior to each days use. The conductivity meter was
calibrated using a potassium chloride solution with an electrical conductivity in the 78 to 6,668 micro-
Siemens per centimeter (µS/cm) range. The pH meter was calibrated using NBS traceable buffers
with pH values of 7.0 and 10.0 units. Static groundwater level measurements were taken with an
electronic water level indicator. Surface water flow was measured with a Swoffer Mode12100 portable
velocity meter.
Table 1, CDPS Analytical Llst, presents the parameter list for the CDPS samples. Table 2, Surface Water
Analytical L.irt, shows the laboratory analyses for the surface water samples. Table 3, Groundwater
Analytical List, presents the laboratory analyses for the groundwater samples. Analyses were performed
by ACZ Laboratories, Inc. (ACZ) of Steamboat Springs, Colorado. ACZ performs all analyses by
Environmental Protection Agency (EPA) or equivalent methods. Samples were hand-delivered to the
lab the day of collection in an iced cooler.
3.2 SURFACE WATER DATA
3.2.1 CDPS Monitoring
There are two CDPS monitoring sites at the Loadout, the Truck Loop Pond (Outfall OOlA), identified
as NPDESIH in the data summary tables, and the Rail Loop Pond (Outfall OOZA), identified as
NPDES2H in the data summary tables. The locations of the two CDPS monitoring sites are shown
on Figure 1, Monitoring Site Location Map.
During 2002, no discharge was observed at either site. Appendix A includes a listing of water quality
statistics for previous years for the Loadout CDPS sites.
Pet the requirements of the CDPS permit, No. COG-850008, quarterly Dischazge Monitoring Reports
(DMRs) were submitted to the appropriate regulatory agencies. Copies of the 2002 DMRs axe
provided in Appendix B, CDPS Discharge Monitoring Reports.
3.2.2 Stream Monitoring
Two stream monitoring locations were sampled in the vicinity of the Loadout along Dry Creek.
Permit specified monitoring consists of semi-annual (spring and faU) monitorng for flow and water
quality. The upstream surface water monitoring site (HGSDI) is located approximately 1.5 miles
upstream of the Loadout permit boundary. The downstream surface water monitoring site (HGSD3)
is located immediately downstream of the Loadout facility area. A third location, HGSD2, which was
downstream of HGSD3 was abandoned' in 1995. The locations of HGSDI and HGSD3 are shown
on Figure 1, Monitoring Site Location Map.
Surface water quality data for 2002 are included in Appendix C, Surface WaterQuality Data. A review of
the laboratory analyses for samples collected in May, the spring monitoring event, shows that water
column constituents from HGSDI and HGSD3, with a few exceptions, were similar to those seen in
previous sampling events. As noted in Section 2, precipitation in 2002 was significantly less than
normal. Consequently, stream flows in October were very low. HGSD3 was dry and, therefore, it was
not sampled in October. Flow at HGSDI in October was visually estimated at 2 gallons per minute
(0.0004 cubic feet per second). The major anions and cations, as well as, several trace metals (boron,
manganese and molybdenum) had slightly higher concentrations in October than previously seen.
MWFI * 1475 Pane Groac Rand, Sui<c 109 * Steamboat Springs, CO 80477 * (970J 8795260