Asbestos Abatement >> How To Dispose Of Asbestos Siding In Texas

This mandatory appendix specifies the procedure for analyzing air samples for asbestos and specifies quality control procedures that must be implemented by laboratories performing the analysis. The sampling and analytical methods described below represent the elements of the available monitoring How To Dispose Of Asbestos Siding In Texas methods.

Such as Appendix B of this regulation, the most current version of the OSHA method ID-160, or the most current version of the NIOSH Method 7400). All employers who are  required to conduct air monitoring under paragraph (f) of the standard are required to utilize analytical laboratories that use this procedure, or an equivalent How To Dispose Of Asbestos Siding In Texas method, for collecting and analyzing samples. 

Sampling and Analytical Procedure 1. The sampling medium for air samples shall be mixed cellulose ester filter membranes. These shall be designated by the manufacturer as suitable for asbestos counting. See below for rejection of blanks. The preferred How To Dispose Of Asbestos Siding In Texas collection device shall be the 25-mm diameter cassette with an open-faced 50-mm electrically conductive extension cowl. 

The 37-mm cassette may be used if necessary but only if written justification for the need to use the 37-mm filter cassette accompanies the sample results in the employee's exposure monitoring record. Do not reuse or reload How To Dispose Of Asbestos Siding In Texas cassettes for asbestos sample collection. 3. An air flow rate between 0.5 liter/min and 2.5 liters/min shall be selected for the 25/mm cassette. 

If the 37-mm cassette is used, an air flow rate between 1 liter/min and 2.5 liters/min shall be selected. Where possible, a sufficient air volume for each air sample shall be collected to yield between 100 and 1,300 fibers per square millimeter on the membrane filter. If a filter darkens in appearance or if loose dust is seen on the filter, a second How To Dispose Of Asbestos Siding In Texas sample shall be started. 

Ship the samples in a rigid container with sufficient packing material to prevent dislodging the collected fibers. Packing material How To Dispose Of Asbestos Siding In Texas  that has a high electrostatic charge on its surface (e.g., expanded polystyrene) cannot be used because such material can cause loss of fibers to the sides of the cassette. 

Calibrate each personal sampling pump before and after use with a representative filter cassette installed between the pump and the calibration devices. 7. Personal How To Dispose Of Asbestos Siding In Texas samples shall be taken in the "breathing zone" of the employee (i.e., attached to or near the collar or lapel near the worker's face). 

Fiber counts shall be made by positive phase contrast using a microscope with an 8 to 10 X eyepiece and a 40 to 45 X objective for a total magnification of approximately 400 X and a numerical aperture of 0.65 to 0.75. The microscope shall also be fitted with a How To Dispose Of Asbestos Siding In Texas green or blue filter. 

The microscope shall be fitted with a Walton-Beckett eyepiece graticule calibrated for a field diameter of 100 micrometers (+/- 2 micrometers). 10. The phase-shift detection limit of the microscope shall be about 3 degrees measured using the HSE phase shift How To Dispose Of Asbestos Siding In Texas test slide as outlined below. 

Place the test slide on the microscope stage and center it under the phase objective. b. Bring the blocks of grooved lines into focus. Note: The slide consists of seven sets of grooved lines (ca. 20 grooves to each block) in descending order of How To Dispose Of Asbestos Siding In Texas visibility from sets 1 to 7, seven being the least visible. 

The requirements for asbestos counting are that the microscope optics must resolve the grooved lines in set 3 completely, although they may appear How To Dispose Of Asbestos Siding In Texas somewhat faint, and that the grooved lines in sets 6 and 7 must be invisible. Sets 4 and 5 must be at least partially visible but may vary slightly in visibility between microscopes. 

A microscope that fails to meet these requirements has either too low or too high a resolution to be used for asbestos counting. c. If the image How To Dispose Of Asbestos Siding In Texas deteriorates, clean and adjust the microscope optics. If the problem persists, consult the microscope manufacturer. 11. Each set of samples taken will include 10% field blanks or a minimum of 2 field blanks. 

These blanks must come from the same lot as the filters used for sample collection. The field blank results shall be averaged and subtracted from the analytical results before reporting. A set consists of any How To Dispose Of Asbestos Siding In Texas sample or group of samples for which an evaluation for this standard must be made. 

Any samples represented by a field blank having a fiber count in excess of the detection limit of the method being used shall be rejected. 12. The samples shall be mounted by the acetone/triacetin How To Dispose Of Asbestos Siding In Texas method or a method with an equivalent index of refraction and similar clarity. 13. Observe the following counting rules. 

Count only fibers equal to or longer than 5 micrometers. Measure the length of curved fibers along the curve. b. In the absence of other How To Dispose Of Asbestos Siding In Texas information, count all particles as asbestos that have a length-to-width ratio (aspect ratio) of 3:1 or greater. c. Fibers lying entirely within the boundary of the Walton-Beckett graticule field shall receive a count of fibers.

Crossing the boundary once, having one end within the circle, shall receive the count of one half (1/2). Do not count any fiber that crosses the graticule boundary more than once. Reject and do not count any other fibers even though they may be visible How To Dispose Of Asbestos Siding In Texas outside the graticule area. 

Count bundles of fibers as one fiber unless individual fibers can be identified by How To Dispose Of Asbestos Siding In Texas observing both ends of an individual fiber. e. Count enough graticule fields to yield 100 fibers. Count a minimum of 20 fields; stop counting at 100 fields regardless of fiber count. 14. Blind recounts shall be conducted at the rate of 10 percent. Quality Control Procedures. 

Intralaboratory program. Each laboratory and/or each company with more than one microscopist counting slides shall establish a statistically designed How To Dispose Of Asbestos Siding In Texas quality assurance program involving blind recounts and comparisons between microscopists to monitor the variability of counting by each microscopist and between microscopists. 

In a company with more than one laboratory, the program shall include all laboratories, and shall also evaluate the laboratory-to-laboratory variability. 2.a. Interlaboratory program. Each laboratory analyzing asbestos samples for compliance determination shall implement an interlaboratory How To Dispose Of Asbestos Siding In Texas quality assurance program that, as a minimum, includes participation of at least two other independent laboratories. 

Each laboratory shall participate in round robin testing at least once every 6 months with at least all the other laboratories in its interlaboratory quality assurance group. Each laboratory shall submit How To Dispose Of Asbestos Siding In Texas slides typical of its own workload for use in this program. 

The round robin shall be designed and results analyzed using appropriate  How To Dispose Of Asbestos Siding In Texas statistical methodology. All laboratories should also participate in a national sample testing scheme such as the Proficiency Analytical Testing Program (PAT), or the Asbestos Registry sponsored by the American Industrial Hygiene Association (AIHA). 

All individuals performing asbestos analysis must have taken the NIOSH course for sampling and evaluating airborne asbestos dust or an equivalent course. 4. When the use of different microscopes contributes to differences between counters and laboratories, the effect of How To Dispose Of Asbestos Siding In Texas.

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