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Walk-Through Survey Report of National Potash Company, Potash Facility, Carlsbad, New Mexico.

Roberts-D; Boeniger-M

NIOSH 1980 May:5 pages

00113360

Worker exposure to diesel exhaust emissions was investigated at the Potash Facility (SIC-2819), National Potash Company, in Carlsbad, New Mexico on February 11, 1980. The company was included in a retrospective environmental epidemiology study of potash miners and millers. The facility employed 160 workers underground over three shifts and 7 days a week. Laboratory staff periodically measured dust concentrations in the mine and mill. Safety personnel tested diesel units for compliance with emission limits. Employees were given preemployment physicals. Measurements in an operating face revealed a velocity of less than 20 linear feet per minute (lfm) for incoming air and 90lfm for air leaving the entry face. Blast gases leaving the conventionally mined area in the dinner hole exceeded the threshold limit value (which was not specified) for nitrogen- dioxide (10102440) 10 minutes after a blast. The authors recommend improved work practices or ventilation design to reduce the likelihood of employee exposure. A followup survey of this facility is not recommended.

NIOSH-Author; NIOSH-Survey; Field-Study; Region-6; Health-surveys; Worker-health; Industrial-hygiene; Diesel-emissions; Combustion-products; Exhaust-gases; IWS-122-16;

10102-44-0;

19800520

1980

PB83-104059

A01

IWS-122-16

DSHEFS;

Infectious Diseases; Disease and Injury;

2819;

Division of Surveillance, Hazard Evaluations and Field Studies, NIOSH, Cincinnati, Ohio, 5 pages

NM; OH;