2012-12-10_REVISION - M2004009 ‎(9)‎

• Permit No: M2004009
• IBM Index Class Name: REVISION
• Doc Date: 12/10/2012
• Doc Name: Responses to Second Adequacy Review
• From: Asphalt Specialties Co.
• To: DRMS
• Type & Sequence: AM2
• Email Name: ECS
• Media Type: D
• Archive: No

permit as necessary to implement such standards in compliance with this
Subsection, 3.1.7 ". For the purpose of determining if a "reasonable potential"
exists for the backfilled shale material to impact water quality through leaching of
inorganic minerals to groundwater, analysis of groundwater flow through the
backfilled shale shall be performed. Observation wells OW -3 through OW -5 are
designed to determine if groundwater occurs and or is flowing through the
backfilled area.
Water levels in observation wells OW -3 through OW -5 shall be measured,
recorded and be reported bi- monthly for 90 days following the completion of the
reclamation backfilling of Cell 2 (A,B,C).
If no water is found in observation wells OW -3 through OW -5, then no water is
flowing through the backfilled material and therefore there would be no
reasonable potential for the backfilled material to cause impacts to water quality.
If observation wells OW -3 through OW -5 yield a saturated layer within the
backfilled shale, then water sampling from MW -1 and MW -2 shall be performed
and reported quarterly for a period of 1 year. The water sampling parameters are
given in Appendix B, which are based on Colorado Regulation No. 41: The Basic
Standards for Groundwater (5 CCR 1002 -41) (WQCC 2009).
1.5 PARAMETERS ANALYZED, WATER QUALITY ANALYSIS METHODS,
AND QUALITY CONTROL/QUALITY ASSURANCE METHODS;
Groundwater samples shall be analyzed for the parameters given in Appendix B,
which is taken from the Colorado Regulation No. 41: The Basic Standards for
Groundwater, Table 2 — Inorganic parameters for domestic water supply.
1.6 FORMATIONS, AQUIFERS OR STRATA TO BE SAMPLED;
The aquifer to be sampled is the tributary alluvial aquifer composed of sand and
gravel.
1.7 POTENTIAL SOURCES OF GROUNDWATER CONTAMINATION THAT
WILL BE MONITORED BY EACH POINT OF COMPLIANCE
MONITORING POINT;
The potential source of groundwater contamination is the backfilled shale
material. MW -2 will be constructed just down - gradient of any groundwater flow
that may be transmitted through the backfilled shale.
1.8 TIME - SCHEDULE FOR IMPLEMENTATION
Monitor wells 1 -2 shall be constructed and ambient water quality will be sampled
before the end of 2012 or early 2013. If necessary, MW -2 will be sampled
quarterly for one year following the backfilling of CeII 2. Observation wells OW -1
and OW -2 shall be constructed before the end of 2012 or early 2013 and
observation wells OW -3 through OW -5 shall be constructed following the
completion of backfilling CeII 2.
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