# Presentation: 330209

## PROPOSED DUST RULES

- DEPARTMENT of LABOR
- Mine Safety & Health Administration Coal Mine Safety & Health

**thaxton-robert:**

## BLACK LUNG PREVALENCEVSRESPIRABLE DUST CONCENTRATIONS

- 54% SAMPLES > 2.0

- BLACK LUNG PREVALENCEVSRESPIRABLE 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

## Package - 2 Rules

- Develop Effective Plans

- Components - Control of Dust & Monitoring Effectiveness

- Significance

- SINGLE-SAMPLE

- PLAN VERIFICATION

**New Finding - Average Concentration Accurately Measured Over Single Shift**

**Rescinds 1972 Finding on the Accuracy of Single-Shift Sample**

**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**

**MSHA Samples used to set Reduced Standards due to Quartz**

## VERIFICATION OF PLAN

**Current Rule**

**2003 Proposed Rule**

**MSHA Sampling to Approve Plan**

**Operator Samples to Verify Effectiveness of Plan at Underground Mines**

**60% of Average Production**

**Full-Shift, 8-hours or less, Portal-to-Portal Samples**

**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**

## SHIFT PRODUCTION  (RAW TONS)

- 1000

- 6000

- 5000

- 4000

- 3000

- 2000

- 10000

- 9000

- 8000

- 7000

- 0

- 10th highest (67th percentile)

- Average = 6295 tons

- 90 % of Average)

- 60 % of Average

- 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 72.700, 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**

**Operators Collect Abatement Samples to Determine Compliance after Issuance of Citation**

**MSHA Quarterly Sampling on MMUs,  Section DAs and Part 90 Miners**

**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**

**Citations Issued for Exceeding Applicable Standard**

**Citations Issued for Exceeding Applicable Standard**

**Must take Action to Reduce Concentrations when Sample Exceeds Standard**

## COMPLIANCE/NONCOMPLIANCE                                                      	      DETERMINATIONS

**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 Rule**

**2003 Proposed Rule**

**Miners have Right to Accompany (with pay) MSHA Personnel During MSHA Sampling**

**Operator Notify Miners of Date and Time  Prior to Verification/Quarterly  Sampling**

**Miner Participation during Operator Sampling**

**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**

**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)**

## 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**

## BENEFITS

**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****3**** 1.69 ****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 2.33. **

**Operator collects 1****st**** verification sample****	****	****	****1.60 ****mg/m****3****	****1.70 ****mg/m****3**
**	****	****	****	****	**** ****	****    ****72 ****μg/m****3****     92 ****μg/m****3**** **

**Miner oper.****	****	****1.62 ****mg/m****3**** ****	****78 ****μg/m****3**** **
**Miner helper****	****	****1.71**
**Shuttle car  Oper****	****	****1.41**
**Roof Bolter Oper 1****	****2.38****	****138**
**Roof Bolter Oper 2****	****2.42****	****141  =  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.

- Dust

- Quartz

## SAMPLING SCENARIO - 2

**Plan verified on 2 samples (critical values of 1.85 and 93)**

**2****nd**** verification sample****	****	****       1.63 ****mg/m****3**** 1.69 ****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 sample****	****	****	****1.60 ****mg/m****3****	****1.70 ****mg/m****3**
**	****	****	****	****	**** ****	****    ****72 ****μg/m****3****     92 ****μg/m****3**** **

**Miner oper.****	****	****1.62 ****mg/m****3**** ****	****78 ****μg/m****3**** **
**Miner helper****	****	****1.61**
**Shuttle car  Oper****	****1.21**
**Roof Bolter Oper 1****	****1.41****	**** 55**
**Roof Bolter Oper 2****	****1.48****	**** 47  <  5.0%**

**Production during MSHA sample - 750 tons,  VPL in plan - 800 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 - 1.75 ****mg/m****3 ****exceeds the criteria level of 1.71 ****mg/m****3**** . **

- Miner oper.

- Roof Bolter.

- Dust

- Quartz

## 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 - 3.2     [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****3 ****	****130 ****μg/m****3**** **
**	****	****	****	****060 occupation****	****2.0 ****mg/m****3**** ****	****145 ****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

- Operator Sampling

- Sample Date  04/99             Mine ID 1800724

**OCCUPATION                    **

**Cont. Miner Oper.**

**CONCENTRATION**

**Sample #1**

**3.20**

**Sample #2**

**1.6**

**Sample #3**

**1.5**

**Sample #4**

**0.8**

**Sample #5**

**3.1**

**AVERAGE**

**2.0**