Document jB7vVkR3eMY85aLmxMM0k6YbN

/f { ABEX CORPORATION AMERICAN BRAKEBLOK DIVISION WINCHESTER, VIRGINIA 2 PLAINTIFFS I1 -EXHIBIT AB--158 HYGIENE SURVEY FOR LEAD AND ASBESTOS NOVEMBER 16, 1966 CHARLES A. COLE, JR. INDUSTRIAL HYGIENIST LOSS PREVENTION DEPARTMENT SCF-ABEX-1030 SPNY 005616 AB EX-082 (/ ABES. CORPORATION AMERICAN BRAKEBLOK DIVISION WINCHESTER, VIRGINIA HYGIENE SURVET FOR LEAD AND ASBESTOS On October 19 and 20, 1966, samples for airborne lead and asbestos dost were collected in the wet and dry compounding areas, in the book and block press preforming areas, in the block and strip finishing areas, and in the mainte nance area where lead hammer heads are molded. The samples for lead were of the basic compound. collected at operations in which lead was part The lead samples were analyzed by our Hopkinton, Massachusetts, laboratory and compared to a threshold limit value of 2.0 milligrams of lead per 10 cubic meters of air. Hie dust samples were counted microscopically and compared to a threshold limit value of 5 million particles per cubic foot. CONCEPSIONS 1. The lead and dust are controlled well below the threshold limit value at the book press preformers having exhaust systems; but concentrations ' detected at those not exhausted are excessive; and the exhaust systems should be completed as soon as possible. 2. The airborne lead detected at the unexhausted block press preformers is excessive, and exhaust controls should be installed on those machines as soon as possible. 3. Hie dust and lead detected in the block and strip finishing areas were well below the threshold limit values, and controls in those areas appear adequate. 4. Hie concentration of lead detected at the dry compounding line was below the threshold limit value, and present lead controls appear adequate. 5. The dust concentrations detected at the asbestos weighing station on the dry compounding line were below the threshold limit value, but the general room sanfle (#2) was greater than the threshold limit value. It appears that the dust detected may have come' from the compounding line, and addi tional dust collecting equipment or a modification in confounding pro cedure may be needed. 6. The dust concentrations on the first floor under the dry mix line were almost exactly the threshold limit amount, and further exhaust controls may be needed there. 7. The lead and dust concentrations detected at the wet confounding line were greater than the threshold limit values, and further controls may be needed. 8. The lead concentrations detected at hammer head molding were well below the threshold limit value, and present controls appear adequate. November 16, 1966 CAC/bm Cl Industrial Hygienist Loss Prevention Department SPNY 005617 ( RECOMMENDATIONS 1. Complete the Installation of the planned air exhaust on the book and block press prefonaers as soon as possible. 2. Complete the installation of the new mixers and exhausted dumping location on the first floor of the dry line mixing as soon as possible. 3. Repair the hood at the asbestos weighing station on the wet mix line. 4. Replace the rubber gaskets that help to seal the joint between asbestos weighing hopper and the mixer on the wet line. 5. Check the procedure used at the wet line to be certain only the ndniimim possible airborne dust is generated when the asbestos is dumped. 6. Repair the defective damper valves on the wet mix line compounding so they can easily be opened and closed. 7. Check the final weighing location on the dry mix line to be certain the air exhaust provided is properly used. SPNY 005618 ( DATA: Airborne Dust METHOD OF COLLECTION: Vacuum puags with impingers, collected In distilled water METHOD OF ANALYSIS: Counted microscopically using the light field technique with a Spencer Hemacytometer counting cell THRESHOLD 1IMIT VALtJE: 5 Million particles per cubic foot of air for dost containing asbestos. SAMPLE NUMBER- 1 2 TIME 10/19/66 2:25 FM 20 Min, 3*/*0 PM 15 *an. 3 4:14 FM 15 Min. 4 4:50 PM 25 Min. 5 5:35 HI 10 Min. 6 5:35 EM 10 Min. 7 5:48 PM 10 Min. 8 5:48 PM 10 Min. 10/20/66 9 1:25 PM 10 Min, 10 1:40 PM 10 Min. LOCATION RESULT (MPPCF)* Operators breathing zone, weighing and dumping asbestos on dry line General room, breathing zone height, between dry line compounding and asbestos weighing Breathing zone of operator at wet mix line weighing and dumping asbestos and other ingredients Ground floor area where dry line dusq>ed to carts. General room air and breathing zone while one mill unloaded Breathing zone of .operator at book press prefondng 11 and 15, no exhaust General room, breathing zone height between press 5 and 6 Same as sample #~6 Breathing zone of operator at book press preforming 7 and 3, with exhaust 5 7 11.1 5.2 11.7 7.5 5.3 3.5 Breathing zone of operator, #2 rough grinder in block finishing Breathing zone of operator, #5 finish grinder in block finishing 2.0 2.0 SPNY 005619 >1 I (( 11 1:58 PM Breathing zone of rough grinder 10 MLn. #4 in block finishing 12 2:15 PM Breathing zone of operator at 10 Min. drill in strip finishing 2.5 3.0 * Millions of particles per cubic foot SPNY 005620