SILICA, CRYSTALLINE by IR (KBr pellet) 7602 SiO2 MW: 60.08 CAS:14808-60-7 RTECS: VV7330000 (quartz) 14464-46-1 VV7325000 (cristobalite) _________________________________ 15468-32-3_____________ VV335000 (tridymite) METHOD: 7602, Issue 3 EVALUATION: PARTIAL Issue 1: 15 February 1984 Issue 3: 15 March 2003 OSHA : NIOSH: ACGIH: quartz (respirable): 10 mg/ m3 / (% SiO2 + 2); cristobalite and tridymite (respirable): 1/2 the above 0.05 mg/m3 ; carcinogens quartz (respirable) 0.1 mg/m3 cristobalite and tridymite (respirable) 0.05 mg/m PROPERTIES: solid; d 2.65 g/cm3; crystalline transformation: quartz to tridymite @ 867 C; tridymite to cristobalite @ 1470 C; aquartz to P-quartz @ 573 C SYNONYMS: free crystalline silica; silicon dioxide SAMPLING MEASUREMENT SAMPLER: CYCLONE + FILTER (10-mm nylon or Higgins-Dewell (HD), and PVC filter, 37-mm, 5-jm) *see sampling section FLOW RATE: Nylon cyclone: 1.7L/min HD cyclone: 2.2 L/min VOL-MIN: -MAX: 400 L 800 L SHIPMENT: Routine SAMPLE STABILITY: Stable BLANKS: 2 to 10 field blanks per set BULK SAMPLE: High volume or settled dust to identify interferences TECHNIQUE: INFRARED ABSORPTION SPECTROPHOTOMETRY ANALYTE: Quartz ASH: Muffle furnace of RF plasma asher PELLET: Mix residue with KBr; press 13-mm pellet IR: Scan absorbance from 1000 to 600 cm-1 CALIBRATION: NIST SRM 1878a quartz, NIST SRM 1879a cristobalite, USGS 210-75-0043 tridymite diluted in KBr RANGE: 10 to 160 jg quartz ESTIMATED LOD: 5 jg quartz PRECISION (Sr): < 0.15 @ 30 jg quartz per sample, in coal dust [1] ACCURACY RANGE STUDIED: Not studied BIAS: Not determined OVERALL PRECISION (SrT): Not determined ACCURACY: Not determined APPLICABILITY: The working range is 0.025 to 0.4 mg/m3 for a 400-L air sample.

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G ALCOA Engineering Standard PLAINTIFFS EXHIBIT AL-258 Materials and Standards Section - Pittsburgh RESPIRATORY PROTECTION 18.1.1 PAGE 1 1984-01 closing Alcoa's approach, and is not intended to be a recommendation for any recipient other than Alcoa.

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aELIENOPLB ** Merchandise Bulletin MANVILLE CORPORATION/INDUSTRIAL PRODUCTS DIVISION No: 83-14 Effective: Immediately Cancels: MANVILLE REFRACTORY FIBER HANDLING RECOMMENDATIONS =saBsaBsaB KsaaoBaESB asaeMiBs =aosxBmKB=: For many years Manville has recommended that personal protective equipment be worn, along with the exercise of good personal and industrial practices, by those employees exposed to refractory fiber.

PLAINTIFF'S EXHIBIT News Briefs >ce Noise Pollution llealili Nurses i.AAOHN i This proie\.Mun.il non vf ropun'-c action' for ashe'to' luimn iv a Mgnifu.jm titr-ilih hu/ ' workplace zrcorUuig iu an ar : April 1989 issue of VOHjVlour i'si e i.kioii is lor regi'ieru'd nurse' am, in ovule on-then ib health ure for the ,u nun s worker* /*etio<i oj uL^retlucuion One '-ear Ou \tte awvwt'/// Performed b\ N\LaP peer assessor io determine compliance *ich of the louder, larger, and faster r~ ` machines brought about bv this/ The Airborne Asbestos technological boom, "xppruxj-l Handbook (Draft March 19 \ critena after initial application and , even- ra-o vears thereafter Momtonng vi.s. its .i' required million American workers are o hazardous noise on the ioh author R.

November 18, 1980 Abex Corporation RailroarPProducts Group Ms.

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THOMAS LEE KURT MI).

Pacific Northwest Bell Seattle Including Mercer Island Area Code 206 1980/81 I 1.%$?

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