background, development and contents of the phc/chia technical reference document
Post on 06-Jan-2016
21 Views
Preview:
DESCRIPTION
TRANSCRIPT
Background, Development and Background, Development and Contents of the PHC/CHIA Contents of the PHC/CHIA
Technical Reference DocumentTechnical Reference Document
Deborah Dale, HydrogeologistDeborah Dale, HydrogeologistOSM-MCR OSM-MCR
Alton, IllinoisAlton, Illinois
Topics:Topics:• What is the PHC/CHIA reference document?•Background into the development of the document
•Contents
What is the PHC/CHIA reference document?
Hydrologic Considerations for Permitting and Liability Release
Probable Hydrologic Consequences (PHC)
Determination Cumulative Hydrologic Impact Assessment (CHIA)
Post-Mining Hydrologic Assessment (PHA)
Technical reference for the MCRTechnical reference for the MCR
Distributed by the Mid-Continent Distributed by the Mid-Continent Technology Development and Transfer Technology Development and Transfer Team Team
• To provide a systematic approach within the MCR for the review and development of PHCs & CHIAs
Purpose of the document:
• Insight into the regulatory basis for bond release and post-reclamation hydrologic balance
Authors of the document: Brian Hicks, OSM-MCR
Wayne VanBuren, ADEQ
Timothy Walter, TX RRC
Deborah Dale, OSM-MCR
Background into the development of the guidance document
• The Determination of Probable Hydrologic Consequences and The Statement of the Resultsof Test Borings or Core Sampling
Milestones in the Development of PHC/CHIA Guidance Documents
May 1980
• DRAFT Guidelines for Preparation of a Probable Hydrologic Consequences Determination (PHC)
Milestones in the Development of PHC/CHIA Guidance Documents
December 1985
• DRAFT Guidelines for Preparation of a Cumulative Hydrologic Impact Assessment (CHIA)
• DRAFT Appendices to PHC and CHIA Guidelines Documents
• DRAFT Managing Hydrologic Information: A Resource for Development of Probable Hydrologic Consequences (PHC) and Cumulative Hydrologic Impact Assessment (CHIA)
Milestones in the Development of PHC/CHIA Guidance Documents
January 1997
• OSM’s Hydrologic Issues Team releases to the states for review and comment a Phase I guidance document for baseline data (draft)
• Hydrologic Issues Team meets with states to review a draft outline for a Phase II guidance document for writing PHCs and CHIAs (Austin)
Milestones in the Development of PHC/CHIA Guidance Documents
August 1999
April 2001
Following the Austin meeting, several states raised concerns through the Interstate Mining Compact Commission (IMCC) about OSM’s proposed approach
A main concern was that the preparation of any guidance document would carry a requirement for mandatory use rather than discretionary use
Milestones in the Development of PHC/CHIA Guidance Documents
The IMCC and the Western Interstate The IMCC and the Western Interstate Energy Board (WIEB) requested, and Energy Board (WIEB) requested, and OSM agreed, to defer additional work OSM agreed, to defer additional work on Phase II PHC/CHIA guidance until on Phase II PHC/CHIA guidance until a State-Federal workshop on this a State-Federal workshop on this subject could be held and the results subject could be held and the results assessed.assessed.
Milestones in the Development of PHC/CHIA Guidance Documents
March 2002
• Intergovernmental Benchmarking Workshop on PHC/CHIAs (New Orleans)
(57) topics relating to PHC/CHIA topics relating to PHC/CHIA permitting hydrology (either permitting hydrology (either concerns, issues or merely areas of concerns, issues or merely areas of interest) were identified during the interest) were identified during the course of the workshopcourse of the workshop
Milestones in the Development of PHC/CHIA Guidance Documents
Milestones in the Development of Milestones in the Development of PHC/CHIA PHC/CHIA Guidance DocumentsGuidance Documents
• Draft Methodology for Review and Preparation of PHC Determinations and CHIAs in the Mid-Continent Region
January 2006
Technical Reference for the Mid-ContinentRegion:
Hydrologic Considerations for Permitting andLiability Release
Probable Hydrologic Consequences (PHC) DeterminationCumulative Hydrologic Impact Assessment (CHIA)
Post-Mining Hydrologic Assessment (PHA)
Distributed by the Mid-Continent Technology Development and Transfer Team
September 2006
Draft
Hydrologic Considerations for Permitting and Liability Release
Probable Hydrologic Consequences (PHC)
Determination Cumulative Hydrologic Impact Assessment (CHIA)
Post-Mining Hydrologic Assessment (PHA)
This guidance document has (4) main sections:
Probable Hydrologic Consequence (PHC)
Hydrologic Reclamation Plan (HRP)
Cumulative Hydrologic Impact Assessment (CHIA)
Post-Mining Hydrologic Assessment (PHA)
Probable Hydrologic Consequences (PHC)
DeterminationAddresses the anticipated effects of the
planned mining and reclamation on the quality/quantity of sw and gw systems
Determine if AFM are present
Describe and characterize the subsurface strata
Overburden properties
Disposal/storage operations
• Non-coal waste
• Spoil• Coal processing waste
• Coal combustion byproducts
PHC - -
PHC - Erosion and sediment control
PHC - Mining methods
PHC - Coal-bed methane recovery
Hydrologic Reclamation Plan (HRP)
Detailed description of how to:1)Minimize impacts to sw & gw systems within
and adjacent to the permit area; and2) Prevent material damage outside the permit area
*HRP must include mitigation plans for hydrologic impacts - BTCA
HRP Elements: AMD generation
• Controlled placement of overburden
• Water management• Mitigation options
HRP Elements (continued): Non-acidic mine drainage
Recharge capacity
Disposal activities
• High TDS (i.e. sulfates, chlorides)
Increased sediment loading
SW and GW monitoring
HRP Elements (continued): Water supply replacement
a.k.a. the Chia Pet
Cumulative Hydrologic Impact Assessment (CHIA)
Cumulative Hydrologic Impact Assessment (CHIA)
An assessment of the probable cumulative impacts of all anticipated mining in an area to assure the operation has been designed to prevent material damage to the hydrologic balance outside the permit area
Cumulative Hydrologic Impact Assessment (CHIA)
An assessment of the probable cumulative impacts of all anticipated mining in an area to assure the operation has been designed to prevent material damage to the hydrologic balance outside the permit area
Hydrologic balance: Relationship between the quality/quantity of water flowing into, stored within, and discharging from a unit (i.e. drainage basin, aquifer, lake, etc.)
Highlights of the CHIA section:
When is a CHIA required? Relationship between PHC and CHIA
• Prospective mining operations + all existing operations
“Anticipated mining”(30 CFR 701.5 “cumulative impact area”)
Highlights of the CHIA section (continued):
Cumulative Impact Area (CIA)• Definition of the CIA• Qualitative delineation of the CIA (sw and
gw)
Highlights of the CHIA section (continued):
Cumulative Impact Area (CIA)• Definition of the CIA• Qualitative delineation of the CIA (sw and
gw)
Baseline conditions
• Quantitative check of the working CIA Criteria for evaluating
Identification of hydrologic concerns• Water quantity issues• Changes in water quality
Highlights of the CHIA section (continued):
Material damage• Definition (from previous draft CHIA
guidelines, OSM 1985, 1997); examples
• Functions of material damage criteria (standards, enforcement)
Methods for analysis of cumulative hydrologic impacts
Statement of findings
Post-Mining Hydrologic Assessment (PHA)
Regulatory basis for release of performance bondsPost-reclamation hydrologic balance
DOES CURRENT WATER QUALITY MEET APPLICABLE
STATE OR FEDERAL STANDARDS?
DO TREND
ANALYSIS
DO TREND
ANALYSIS
DO TREND
ANALYSIS
RECOMMEND
APPROVAL
RECOMMEND
APPROVAL
RECOMMEND
APPROVAL
RECOMMEND
DENIAL
RECOMMEND
DENIAL
IS CURRENT WATER QUALITY BETTER
THAN BASELINE WATER QUALITY?
CONTINUED
MONITORING MAY
BE REQUIRED
CONTINUED
MONITORING MAY
BE REQUIRED
IS WATER SUITABLE FOR
ITS INTENDED USE?
YES
NO
YESNO
+/0
+/0
+/0
NO
-
YES OR
SAME
-
-
WATER-QUALITY TREND
+ IMPROVING
0 NO CHANGE
- WORSENING
Appendices:
Appendix A: Glossary of water-related words, 153 p
Appendix B: Outline of suggested minimum requirements for PHCs
Appendix C: Outline of suggested minimum requirements for HRPs
Appendix D: Outline of suggested minimum requirements for CHIAs
Appendix E: Outline of suggested minimum requirements for PHAs
Appendix F: Resources for processes/tools for determining impacts, 17 p (databases, software, training, etc.)
top related