Document GmrpGZLD4bYvzR2rDYq297MwN
PLAINTIFF'S EXHIBIT
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ENVIRONMENT, HEALTH & SAFETY
DATE! TO: FROM: SUBJECT:
MAY 18*89
May 17, 1989
C. R. Ferguson Anacortes, WA
O. W. Rigdon Allen Center - Houston, TX
SAF STUDIES, SURVEYS, AND REPORTS
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TEXACO REPINING AND MARKETING INC.
PUGET SOUND PLANT ______________
Routine Industrial Hygiene Monitoring
{Respirable Silica, Respirable Nuisance Dust)
SYNOPSIS
Industrial hygiene monitoring identified personal breathing zone sample concentrations of respirable silica and nuisance dust to be less than applicable exposure limits. The silica result was less than the analytical limit of detection. Recommendations concerning employee notification of results and additional monitoring are included herein.
BACKGROUND
Industrial hygiene monitoring was conducted by C. JR. Chebul in response to a request made by a union representative. Two personal breathing zone samples were collected while a Stockmar Northwest contract employee cut dip lag, and unpacked and stored calcium silicate insulation in the insulation shed. These activities are routinely performed by both contract and Texaco employees. The samples were analyzed for both respirable dust and respirable silica since there are separate exposure limits for these contaminants. The insulation shed has a general dilution ventilation system. During the monitoring, the employee wore a disposable particulate respirator.
RESULTS ' *
The monitoring results are provided in Tables I and II, attached to this report. The data are presented as full-shift breathing zone concentrations with the units of milligrams per cubic meter (mg/m3) of air. The "less than" symbol (<) preceding the data indicates the contaminant was at or below the least quantifiable air monitoring limit of detection. The air monitoring limit of detection is a function of the analytical limit of detection and the sample air volume. Attachment A summarizes the applicable exposure limits utilized by Texaco.
WA-TEX 000965
C. R. Ferguson May 17, 1989 Page 3 Should you have any questions concerning this report, please direct them to Ms. B. Bessette-Henderson, Texnet 658-4110. BBH;aw e:pspdo689.%% RAC Attachment UVHjr
WA-TEX 000966
ATTACHMENT A EXPOSURE LIMITS
CONTAMINANT
WISHA PEL*
-ACGTH TLV**
Respirable Dust
5.0 mg/m3
Crystalline Silica (Quarts)
0.1 mg/m3
Generally, the exposure limits referenced above are the lowest of those developed by either the Washington Industrial Safety and Health Administration (WISHA), or the American Conference of Governmental Industrial Hygienists (ACGIH).
* An employee's exposure in any eight-hour work shift of a 40-hour work week shall not exceed the WISHA eighthour time-weighted average (TWA) permissible exposure limit (PEL) for that material.
** The American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit values (TLV) are eight-hour adjusted time-weighted average exposure concentrations to which nearly all workers can be exposed, day after day, without adverse effect.
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