Naturally-Occurring Asbestos - Air Monitoring

This page last reviewed June 25, 2008

Asbestos Air Monitoring - El Dorado County California

Measured Ambient Asbestos Concentrations - Summary of Results
General Asbestos Monitoring
One hundred ninety-five of the 252 results monitored during the sampling period were found to be below the minimum detection limit (MDL). The MDL is the level below which you cannot accurately quantify the amount of the substance being sampled. For example, you cannot accurately weigh anything below a pound on your typical bathroom scale. The MDL for asbestos can vary depending upon the volume of air which is drawn through the filter and the amount of the filter analyzed. The ARB is currently working on lowering the MDL for asbestos so that lower concentrations can be accurately measured.
Quick Summary - GeneralDetailed Sampling Results - General
Asbestos Monitoring Near a Potential Asbestos Source
During October 1998, the ARB conducted ambient monitoring generally near a potential asbestos source in El Dorado County. Air samples were taken at seven separate monitoring locations near an operating serpentine quarry from October 2, 1998 through October 18, 1998. Eighty-seven of the 110 results monitored during the sampling period were found to be above the MDL. 
Quick Summary - Near SourceDetailed sampling results - Near Source
Asbestos Monitoring in Silva Valley
 During April 1999, the ARB conducted ambient monitoring in the Silva Valley area of El Dorado County. Air samples were taken at seven separate monitoring locations from April 21 through April 29, 1999. Five of the 35 results monitored during the sampling period were found to be above the MDL.
Quick Summary - Silva ValleyDetailed Sampling Results - Silva Valley
Asbestos Monitoring in Garden Valley
During August 1999, the ARB also conducted ambient monitoring in the Garden Valley area of El Dorado County. Air samples were taken at seven separate monitoring locations from August 16 through August 26, 1999. Thirty-two of the 38 results monitored during the sampling period were found to be above the MDL.
Quick Summary - Garden ValleyDetailed Sampling Results - Garden Valley
Asbestos Monitoring Around Woedee Drive
In January 2000, the ARB conducted ambient monitoring around Woedee Drive. Air samples were taken at four separate monitoring locations from January 7 through January 10, 2000. None of the samples collected were found to be above the MDL. 
Quick Summary - Woedee DriveDetailed Sampling Results - Woedee Drive
Asbestos Monitoring During Pile Removal Project on Woedee Drive
The ARB conducted additional ambient monitoring in the Woedee Drive area during the removal of asbestos-containing dirt piles. Air samples were taken at four separate monitoring locations surrounding a vacant lot where the piles were located on February 8, 2000 and February 9, 2000. None of the samples collected were found to be above the MDL. 
Quick Summary - Pile Removal Woedee DriveDetailed Sampling Results - Pile Removal Woedee Drive
 

Air Toxics Program

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