PROPOSED DUST RULES DEPARTMENT of LABOR Mine Safety & Health Administration Coal Mine Safety & Health DEPARTMENT of LABOR Mine Safety & Health Administration.

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Presentation transcript:

PROPOSED DUST RULES DEPARTMENT of LABOR Mine Safety & Health Administration Coal Mine Safety & Health DEPARTMENT of LABOR Mine Safety & Health Administration Coal Mine Safety & Health thaxton-robert:

11.0% 54% SAMPLES > 2.0 BLACK LUNG PREVALENCE VS RESPIRABLE DUST CONCENTRATIONS 11.0% 4.1% 3.4% 2.9% 2.8% Percent of Samples Exceeding 2.0 mg/m3 with Average Concentration( ) * 54% (3.0) 13% (1.1) 12% (1.1) 12% (0.9) 8% (0.9) * Based on Operator DO Samples

Develop Effective Plans Components - Control of Dust & Monitoring Effectiveness tt tt tt tt tt tt tt tt Significance    tt tt tt tt tt tt tt tt tt tt tt tt tt tt tt tt SINGLE-SAMPLE PLAN VERIFICATION New Finding - Average Concentration Accurately Measured Over Single Shift Rescinds 1972 Finding on the Accuracy of Single-Shift Sample tt tt tt tt Added New Standard - Secretary may use Single Full- Shift Measurement to Determine Average Concentration Over that Shift Each Underground Coal Mine Operator Must have a Verified Ventilation Plan (Dust controls) Plan will be Verified Under Actual Mining Conditions by Operator Samples MSHA Assumes Responsibility for Compliance and Abatement Sampling in Underground Coal Mines tt tt tt tt MSHA Samples used to set Reduced Standards due to Quartz tt tt tt tt 

VERIFICATION OF PLAN Current Rule2003 Proposed Rule MSHA Sampling to Approve PlanOperator Samples to Verify Effectiveness of Plan at Underground Mines tt tt tt tt tt tt tt tt tt tt tt tt 60% of Average Production Full-Shift, 8-hours or less, Portal-to-Portal Samples tt tt tt tt tt tt tt tt tt tt tt tt Higher than Average Production Full-Shift (Production Time) Samples Separate Quartz and Coal Mine Dust Verification Limits Use of PAPRs or Administrative Controls on any Mining Unit only as a Supplemental Measure after Exhausting Feasible Engineering Controls Plan Approved Based on the Average of Multiple Samples   

PLAN INFORMATION Current Rule 2003 Proposed Rule MSHA Sampling Conducted at 60 % of the Average Production Requires the 10 th Highest Production Level to Verify Plan Effectiveness No Records of Production Required Requires the Recording of Production and Maintaining such Records for 6 Months    

th highest (67 th percentile) Average = 6295 tons 90 % of Average) 60 % of Average SHIFT PRODUCTION (RAW TONS) 30 production shifts at a longwall MMU in District 3. Each “o” represents production on one shift.

USE of PAPRs ( Powered Air-Purifying Respirators ) Current Rule 2003 Proposed Rule When used in Conformance with a Respiratory Protection Program under , may result in a Non-S&S Designation on Overexposure Citations Protection Factor of 2 to 4 (Depending on the Ventilating Air Velocity) Assigned to Mining Section (MMU). Permits use when all Feasible Engineering Controls have been Exhausted Only Loose-Fitting Powered Respirators with MSHA and NIOSH Approval may be used Must provide a Respiratory Protection Program as part of the Approved Ventilation Plan Must Maintain Dust Levels as low as possible with Feasible Engineering Controls A Protection Factor of 4 indicates the air being breathed by the miner is 1/4 the concentration of the air outside the PAPR       

SAMPLING REQUIREMENTS 2003 Proposed Rule Operator Bimonthly Compliance Sampling at Underground Mines Citations Issued for Failure to Submit Required Samples Operator Collects Plan Verification Samples for Initial Approval. Designated MMUs Collect One Sample each Quarter for Confirmation of Controls Continued Effectiveness MSHA Collects all Samples to Determine Compliance and Abatement of Citations tt tt tt tt tt tt tt tt Operators Collect Abatement Samples to Determine Compliance after Issuance of Citation MSHA Quarterly Sampling on MMUs, Section DAs and Part 90 Miners tt tt tt tt tt tt tt tt tt tt tt tt No Citations Issued for Exceeding Applicable Standard All MSHA Determinations made on a Single Full-Shift Measurement Current Requirements Citations Issued for Exceeding Applicable Standard tt tt tt tt Must take Action to Reduce Concentrations when Sample Exceeds Standard tt tt tt tt     

2003 Proposed Rule COMPLIANCE/NONCOMPLIANCE DETERMINATIONS Average of Multiple Samples to Make Compliance/Noncompliance Determinations at All Coal Mines Single-Sample Determinations at All Coal Mines (Underground & Surface ) Non-Compliance Level 2.33 mg/m 3 on 2.0 mg/m 3 Standard Current Rule Citation Levels are Specified in the Plan Verification Rule Average of 5 Samples on 5 Different Shifts. Average Concentration Exceeds the Applicable Standard by 0.1 mg/m 3 or more - Noncompliance is Indicated     

ON-SHIFT EXAMINATION of CONTROLS Current Rule 2003 Proposed Rule Examination of Controls at the Beginning of Each Shift per Current Requirement of 30 CFR Part 75 Maintains Current Requirement  

MINER PARTICIPATION Current Rule2003 Proposed Rule Miners have Right to Accompany (with pay) MSHA Personnel During MSHA Sampling tt tt tt tt Operator Notify Miners of Date and Time Prior to Verification/Quarterly Sampling Miner Participation during Operator Sampling tt tt tt tt Miner Participation during MSHA Sampling Miners have Right to Accompany (with pay) MSHA Personnel During Compliance and Abatement Sampling Operator Notifies Miners Representative of Plan Submission/Revision & Post on Bulletin Board. Miners Representative may Submit Comments during MSHA Review Miners must be Provided Opportunity to Observe - (no Entitlement to Pay) tt tt tt tt     

USE of PERSONAL CONTINUOUS DUST MONITORS Current Rule 2003 Proposed Rule Not Considered Designated Miners must Wear for the Full Shift (portal-to-portal) Any Unit that Secretary of Labor Approves with a Conversion Factor is Acceptable Permits Operator to use Administrative Controls without First Exhausting Engineering Controls No Citations for Overexposure. May be Cited for Failure to take Action to Reduce Overexposures     

BENEFITSBENEFITS No Operator Collected Samples used to Determine Compliance Plan Parameters that Reflect Actual Mining Conditions that have been Verified at High Production Levels Protection for Miners when Feasible Engineering Controls have been Exhausted Provisions for use of Personal Continuous Dust Monitors    

Reduction in CWP due to Single-Shift/Plan Verification Rules DO Designated Occupation NDO Non-Designated Occupation RB Roofbolter Occupation CWP Coal Workers Pneumoconiosis Cases of CWP

SAMPLING SCENARIO - 1 Plan verified on 2 samples (critical values of 1.85 and 93) 2 nd verification sample 1.63 mg/m mg/m 3 71 µg/m 3 91 µg/m 3 MSHA samples during bimonthly period: One citation for RB occupations exceeding 2.0 std. CTV of Operator collects 1 st verification sample1.60 mg/m mg/m 3 72 µg/m 3 92 µg/m 3 Miner oper Miner oper.1.62 mg/m 3 78 µg/m 3 Miner helper1.71 Shuttle car Oper1.41 Roof Bolter Oper Roof Bolter Oper = 5.8% Operator must take corrective action and notify MSHA within 24 hours. MSHA will collect abatement samples. MSHA will collect two additional shifts of samples in the next 30 days to establish the quartz level and set the appropriate standard. Operator must sample the MMU quarterly to establish the continued effectiveness of the dust controls in the approved ventilation plan. Miner oper. Roof Bolter. DustQuartz        

SAMPLING SCENARIO - 2 Plan verified on 2 samples (critical values of 1.85 and 93) 2 nd verification sample 1.63 mg/m mg/m 3 71 µg/m 3 91 µg/m 3 MSHA samples during bimonthly period: Compliance based on single-sample on each occupation. Operator collects 1 st verification sample1.60 mg/m mg/m 3 72 µg/m 3 92 µg/m 3 Miner oper Miner oper.1.62 mg/m 3 78 µg/m 3 Miner helper1.61 Shuttle car Oper1.21 Roof Bolter Oper Roof Bolter Oper < 5.0% Production during MSHA sample tons, VPL in plan tons. Ventilation during MSHA sample - 10,000 cfm, plan quantity - 9,800 cfm. MSHA evaluation for bimonthly sampling: 1.62 x (800/750) x (10,000/9,800) = 1.62 mg/m 3 x 1.06 x 1.02 = 1.75 mg/m 3 78 µg/m 3 x 1.06 x 1.02 = 84 µg/m 3 MSHA bimonthly sampling required mg/m 3 exceeds the criteria level of 1.71 mg/m 3. Miner oper. Roof Bolter. DustQuartz        

PAPR USE SCENARIO Operator submits to use a PAPR program: - full program included with ventilation plan. - All miners working inby shearer must wear PAPR in accordance with the approved plan. - Average velocity across longwall = 490 ft/min - Protection Factor assigned to MMU [2x(800/490)] - Plan must maintain all engineering controls that were determined to be feasible by MSHA. - Equivalent conc. Of 2.0 mg/m 3 sample would be 0.62 mg/m 3 (2.0/3.2) Verification sample results: shearer oper.1.9 mg/m µg/m occupation2.0 mg/m µg/m 3 MSHA determines that all feasible engineering controls are in use. Mine A :Has installed “shearer clearer” shield sprays pan sprays maximum air velocity of 500ft/min VPL = 16,000    

EFFECTS OF AVERAGING Operator Sampling Sample Date 04/99 Mine ID OCCUPATION Cont. Miner Oper. CONCENTRATION Sample #13.20 Sample #21.6 Sample #31.5 Sample #40.8 Sample #53.1 AVERAGE 2.0