2006-03-23_REPORT - M1977424

• Permit No: M1977424
• IBM Index Class Name: Report
• Doc Date: 3/23/2006
• Doc Name: Annual Fee/Report/Map
• From: Occidental Oil Shale Inc.
• To: DMG
• Permit Index Doc Type: Annual Fee / Report
• Media Type: D
• Archive: No

Logan Wash Mine Annual Report
Permit No.: M•1977.424
3.0 Monitoring Activities
Monitoring activities at the Logan Wash Mine during the reporting period consisted of
monitoring of mine water discharge and related sampling activities. These activities included (1)
required flow monitoring and sampling oftwo National Pollution Discharge Elimination System
(NPDES) outfalls on weekly, monthly, and quarterly schedules, (2) measurement of flow rates of
the mine-water discharge and retort-water discharge on a monthly basis, and (3) periodic
measurement of climatic parameters (temperature and precipitation) on the Lower Bench. The
latter two monitoring activities are voluntary.
3.1 NPDES Outfall Sampling
Two NPDES outfalls, administered by the Colorado Department of Public Health and
Environment (CDPHE), were monitored in accordance with permit-established schedules.
Outfall 001 (Logan Wash Mine, main lower portal [L-1 Portal] discharge) and Outfall 002
(Research Mine discharge) are to be monitored weekly for pH, flow rates, total dissolved solids
(TDS), and total suspended solids (TSS); monthly for TDS, TSS, pH, nitrate, sulfate, fluoride,
ammania, COD, boron, oil and grease, and phenols; and quarterly for TDS, TSS, pH, nitrate,
sulfate, fluoride, ammonia, COD, boron, arsenic, copper, lead, oil and grease, and phenols. This
monitoring is required when mine-water drainage from Logan Wash mine reaches a flume in
"Dry Gulch" on the OOSI and BLM property boundary (outfall 001), and when flow is present in
the pipe conveying mine water from the Research Mine {outfall 002).
Sampling was not conducted at outfalls 001 and 002 during the reporting period because of no-
flow conditions at the designated outfall points. During the reporting period, the Research Mine
discharge pipe valve was closed and head was allowed to build-up in the mine (maximum head
measured was 23 inches). This was done to prevent discharge and sampling of the water, and to
accommodate construction activities associated with extending the outfall location to the Lower
Bench. Discharge Monitoring Reports were submitted to CDPHE on a quarterly basis as
required.
For more information regarding the Research Mine portal closure and management of the
Research Mine drainage see Technical Revision (TR) No. 4 and TR No. 6 which present
significant revisions to Exhibit E, the Reclamation Plan for Logan Wash Mine.
3.2 Mine-Water and Retort-Water Discharge
Discharge measurements of clean (non-retort) mine-water discharge (outfalls 001, and 002) and
retort-water discharge were conducted on a monthly basis when possible. These data were
collected by OOSI to assess and evaluate mine closure effectiveness and to support operation and
maintenance of the evaporation pond.
4.0 Reclamation Activities in 2005
Reclamation activities conducted at the Logan Wash Mine in 2005 are discussed in the following
sections.
Western Wafer & Land, Inc. 5