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State of California Department of Health Services <br /> Memorandum <br /> To James Tj osvold Date May 2 , 1989 <br /> Senior Waste Management Engineer <br /> Subject: MCCORMICR AND <br /> BAXTER (M&B) . <br /> INDUSTRIA103 <br /> � <br /> STUDY <br /> Toxic Substances Control Division MW 41989 <br /> From = 4250 Power Inn Road <br /> 924-1230 ENVIRONMENTAL HEALTH <br /> PERMIT/SERVICES <br /> M&B has submitted the results of an industrial hygiene study <br /> performed by Vulcan Chemicals (February 17 , 1989) at the <br /> Stockton facility. The exposure monitoring study included <br /> biological (urine) and air samples. Even though the results <br /> were below standards set by the American Conference of <br /> Governmental Industrial Hygienists (ACGIH) , there are several <br /> comments which should be noted. <br /> Air Monitoring <br /> 1. A wind speed of 25 m.p.h. on December 7 , 1988 , is not an <br /> optimum condition for air sampling. <br /> 2 . One voided sample (M&B 2) had the largest contaminant <br /> loading ( . 0193 mg) . The pre-sampling rate was <br /> 1, 225 ml/min. Using the conservative assumptions that <br /> the rate was similar at the end (usually lower) and the <br /> sample time was 420 minutes (higher than maximum) , the <br /> concentration would be . 038 mg/m3 . This would be the <br /> highest value even with assumptions in favor of a lower <br /> concentration. <br /> 3 . The air concentrations are strictly from <br /> pentachlorophenol vapor. Inhalation of contaminated dust <br /> is not included. <br /> Biological Monitoring <br /> 1. It is unclear if both the samples and the exposure limit <br /> are using the same standard reference. Both should be <br /> based on free pentachlorophenol and/or pentachlorophenol <br /> metabolites. <br />