a new approach to chemical exposure ...guidance for sampling frequency (aiha, 2006) exposure rating...

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A NEW APPROACH TO CHEMICAL EXPOSURE ASSESSMENT: BETTER PROTECTION, IMPROVED EFFICIENCY

TABLE 1 PRIORITIZING CHEMICALS BASED ON SEMI-QUANTITATIVE EVALUATION

Semi-Quantitative Industrial Hygiene Ranking Scheme

Rating*

OEL Ranking (mg/m3)

Engineering Controls Intensity of Use

Quantity Frequency Duration

Mass Volume

1 >100 Full (e.g., fume hood, fully

enclosed glove box) ≤1 mg ≤ 1 mL ≤1 month ≤15 min

2 ≤100 Partial (e.g., LEV) ≤100 mg ≤100 mL

≤1 per week ≤1 hour

3 ≤10 Enclosed (e.g., HPLC

bottles) ≤500 mg

≤500 mL

≤3 per week ≤4 hours

4 <2 None (e.g., open bench) Grams Liters >3 per week >4 hours OEL occupational exposure limit mg/m3 milligrams per cubic meter mL milliliters

* The rating applies to each of the six categories, ranking, engineering controls, mass, volume, duration individually.

Exposure rating = OEL Ranking x Engineering Control x Intensity of Use Average

TABLE 2 RANKING BASED ON RESULTS

Preliminary Quantitative Exposure Rating Scheme

Exposure Rating Description

1 Maximum concentration ≥ lowest OEL

2 Maximum concentration ≥ 50% and < lowest OEL

3 Maximum concentration ≥ 10% and <50% of the lowest OEL

4 Maximum concentration <10% of the lowest OEL

OEL occupational exposure limit

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TABLE 3 AIHA GUIDANCE FOR SAMPLING FREQUENCY (AIHA, 2006)

Guidance for Sampling Frequency (AIHA, 2006)

Exposure Rating Description Typical Monitoring Frequency

1 Exposures ≥OEL Quarterly

2 Exposures ≥50% and <OEL Semi-annually

3 Exposures ≥25% and <50% of the OEL Annual

4 Exposures <25% of the OEL Biannual

OEL occupational exposure limit

EXPOSURE ASSESSMENT PROCESS

AIHA, 2006

A New Approach to Chemical Exposure Assessment: Better Protection, Improved Efficiency

Environmental Health & Engineering, Inc. | www.eheinc.com


February 5 2014February 5, 2014

Compliance-based Approach v.Comprehensive Program

OSHA AAALACInternal

EHS Audits

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IH Management of the Past

Exposure Assessment

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Exposure Monitoring

IH Management Moving Forward

Engineering ControlsHazard

Communication

AdministrativeControls

Hazardous Materials

Management Exposure Assessment

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Personal Protective Equipment

Exposure Monitoring

Education and Training



Current Approach

Sample collection Analysis Reporting

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New Approach

St t


Strategy

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New Approach

St t


Strategy

R t

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Reassessment

Barriers

• Very large/incomplete chemical inventories

• Resources

• Time

• Other issues are priority

Very large/incomplete inventoriesLack of a programLimited resources

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• Lack of a programManual processes



Laboratory

No IH Program

None/few EH&S staff

Inconsistent data gathering

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g g

Many chemicals

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Step 1: Narrowing InventoriesStep 1: Narrowing Inventories

Step 2: Information Gathering

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Step 3: Prioritization

Step 1 – Narrowing Inventories

~5,000

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~5,000

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~5,000

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Step 2 – Information Gathering

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Intensity• Intensity

• Controls

• Automated tools

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tools




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Isoflurane Noise

LAAs Metal alloys

Step 3 - Prioritization

Table 1 Semi-Quantitative Industrial Hygiene Ranking Scheme

Rating*OEL

Ranking (mg/m3)

Engineering ControlsIntensity of Use

QuantityFrequency Duration

Mass Volume

1 >100Full (e.g., fume hood, fully enclosed glove

box)≤1 mg ≤mL ≤1 month ≤15 min

2 ≤100 Partial (e.g., LEV) ≤100 mg≤100 mL

≤1 per week

≤1 hour

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mL week

3 ≤10Enclosed (e.g., HPLC

bottles)≤500 mg

≤500 mL

≤3 per week

≤4 hour

4 <2None (e.g., open

bench)Grams Liters >3 per week >4 hours



Step 3 – Laboratory

Rankings

Agent

Rankings

Exposure Rating

PriorityGroup

UseOEL

EngineeringControl


Chloroform 3 4 2 3 3 32 1Preparing

cells

Hydrogen peroxide

4 4 4 3 3 53 1Cleaningsurfaces

Cleaning

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Isopropanol 1 4 3 3 3 12 2Cleaningsurfaces

Noise NA 1 NA 3 2 3 4Cagewash

Step 3 – Laboratory

Rankings

Agent

Rankings

Exposure Rating

PriorityGroup

UseOEL

EngineeringControl



cells

Hydrogen peroxide

4 4 4 3 3 53 1Cleaningsurfaces

Cleaning


cells

OEL x Control x Average intensity = Ranking

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Isopropanol 1 4 3 3 3 12 2Cleaningsurfaces

Noise NA 1 NA 3 2 3 4Cagewash

OEL x Control x Average intensity = Ranking



Targeted Assessment

Laboratory

5,000

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Targeted Assessment

Laboratory

5,000

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25 high~50 lower



Quantitative Exposure Results

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Step 1: Narrowing Inventories



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Step 4: Program Maintenance






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1

2

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Step 4: Program Maintenance3






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Managing the Program

SharePoint

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SharePoint



SharePoint Tools

• Create Sampling Event calendar

• Populate list of standards for comparison

• Real-time measurements and exposure monitoring events lists

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Scheduling Events

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Sampling Program Tracking

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• Enter data from exposure monitoring events

• Enter data for real-time measurements

Automate the Program

VS

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Reporting Dashboard

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• Provides infrastructure d t l

Summary

and tools• Customizable• Better use resources• Standardize data

collection

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• Centralized management system

• Auto-administration



Additional Information:

Exposure Assessment Program p gDevelopmenthttp://www.eheinc.com/ih_exp_assess.htm

EH&E SharePoint Solutionshttp://www.eheinc.com/ehe_web_solutions.htm

Microsoft SharePoint http://sharepoint.microsoft.com/Pages/Default.aspx

Contact Information:

Erin [email protected]

Karrie [email protected]

a new approach to chemical exposure ...guidance for sampling frequency (aiha, 2006) exposure rating...

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