2015-03-23_REPORT - M1977424

• Permit No: M1977424
• IBM Index Class Name: REPORT
• Doc Date: 3/23/2015
• Doc Name: Annual Report Fee Map
• From: Occidental Oil Shale, Inc
• To: DRMS
• Email Name: THM
• Media Type: D
• Archive: No

Logan Wash Mine Annual Report
Permit No. M- 1977 -424
Outfall 00 1) discharge and retort-water discharge; 2) semi- annual sampling of the mine -water
discharge and retort-water discharge, 3) measurement of the manometer installed in the Research
Mine Vault, and 4) monitoring of the Evaporation Pond leak detection system. Monitoring data
for the reporting period are shown in Table 4.
3.1 CDPS (NPDES) Outfall Sampling
The CDPS permit for Logan Wash Mine (permit no. C00048816) permitted two outfalls, Outfall
001 (Logan Wash Mine, main lower portal [L1 Portal] discharge) and Outfall 002 (Research
Mine discharge). During the 2014 reporting period, OOSI prepared Technical Revision JR) No.
8 which proposed to infiltrate mine water discharge from the two existing CDPS outfalls as
specified within the permit. This mine water management will occur under provisions of
Memorandum of Agreement (MOA) for the Implementation of SB 181 Amendments to the
Colorado Water Quality Control Act (25 -8 -101, et seq.) Pertaining to the Regulation of Mineral
Mines (Dec. 14 "i, 2010).
WWL submitted TR No. 8 to DRMS on September 25`h, 2013. DRMS provided its initial
preliminary adequacy response (PAR) on October 1 1"', 2013. WWL provided a response to the
PAR on December 19`h, 2013. The response to the PAR was supported by waste rock leachate
data collected and analyzed in October, 2013. DRMS approved TR No. 8 on January 23`d, 2014.
The CDPS application to terminate CDPS permit C00048816 was submitted to CDPHE -WQCD
on February 12 `h, 2014. CDPHE -WQCD approval for termination of the permit became effective
on July 151, 2014. During the entire reporting period, the non -retort mine water ( Outfall 001) was
conveyed with the retort mine water to the Evaporation Pond. Outfall 002 did not discharge
during the reporting period.
For more information regarding the Research Mine portal closure and management of the
Research Mine drainage see 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 mine water (non - retort) discharge ( Outfall 001) and retort water
discharge were conducted on a quarterly or more frequent basis when access and schedule
allowed. Typically, discharge measurements were conducted more frequently (weekly) during the
high flow season in April and May. Continuous flow (meter) monitoring of Outfall 001 water
came on line in August, 2011 as part of a requirement of the CDPS permit. These data were
collected by OOSI to assess and evaluate mine closure effectiveness, to support operation and
maintenance of the Evaporation Pond and future water management options, and meet state
requirements. Table 4 shows the results of monitoring data collected at the mine in 2014, and
Figure 4 shows the results for the Outfall 001 flow meter (LW -001 mine water discharge).
Sampling of retort mine drainage water and mine water ( Outfall 001) was conducted semi-
annually (May and October, 2014) to evaluate retort water quality with time in support of final
mine closure. The samples were collected from the retort water and mine water drainage pipelines
inside the Lower Bench Vault. The analytical results for samples collected during the reporting
period do not indicate a significant improvement of retort water quality compared to past
sampling events (see Table 5). Mine water analytical data is shown in Table 6 and monitoring
well LWCW -IA analytical data is shown in Table 7.
Western Water & Land, Inc. 6