REP38526

• Permit No: C1992081
• IBM Index Class Name: Report
• Doc Date: 2/15/2002
• Doc Name: 2001 AHR Letter & Report
• From: Montgomery Watson Harza
• To: DMG
• Annual Report Year: 2001
• Permit Index Doc Type: Hydrology Report
• Media Type: D
• Archive: No

Febduary 2002 Hayden Gukb Terming/, Inc * 2001 AnuualNydro/ogy Repa4 ~ 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 conductivit}~ 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 and 10. Groundwater level measurements were taken with a water level indicator.
Surface water Elow was measured with a Swoffer Model 2100 portable velocity meter.
Table 1, CDPS Analytical List, presents the parameter list for the CDPS samples. Table 2, Surface Water
Analytical Ilrt, shows the laboratory analyses for the surface water samples. Table 3, Groundwater
AnalytiralLJt{ 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) ox 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 Tmck Loop Pond (Outfall OOlA), identified
as NPDESIH in the data summary tables, and the Rail Loop Pond (Outfall 002A), identified as
NPDES2H in the data summary tables. The locations of the two CDPS monitoring sites aze shown
on Figure 1, Monitoring Site Location Map.
During 2001, no discharge was observed at either site. Appendix A includes a listing of water quality
statistics for previous years for the Loadout CDPS sites.
Per the requirements of the CDPS pemtit, No. COG-850008, quarterly Discharge Monitoring Reports
(DMRs) were submitted to the appropriate regulatory agencies. Copies of the 2001 DMRs aze
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 fall) monitoring 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 (I-IGSD3)
is located immediately downstream of the Loadout facility azea. A third location, HGSD2, which was
downstream of HGSD3 was abandoned in 1995. The locations of HGSDI and HGSD3 aze shown
on Figure 1, Monitoring Site Location Map.
Surface water quality data for 2001 are included in Appendix C, Surfare Water Quality Data. A review of
the laboratory analyses for samples collected from both HGSDI and HGSD3 indicates that
constituent concentrations were generally within the range of previously obsen ed values.
Exceptions in samples collected from HGSDI included aluminum, barium, iron (dissolved),
molybdenum, potassium, and sodium. The aluminum (-0.06 milligrams per liter [mg/1]; a negative
number indicates the value is less than the detection limit) and bazium (0.035 mg/I) values reported in
the June sample were both lower than previously reported values. The June sample had molybdenum
(0.0043 mg/1) and sodium (326 mg/1) concentrations that were greater than previously observed
Montgomery Wahon * PO. Box 774018 * Sleamboa! Syrrngt, CO 80477 * [phone]
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