Document zoaomQ8BajrQL6LELRRLz6nd3

X' f, August 15, 1978 r- H. M. Hancock Apache-Blast abrasive would be a suitable replacement for sand from an industrial hygiene standpoint. The TLV for the mixture is calculated on the attached page. This TLV is significantly greater than the OSIIA PEL for sand. Air samples of this abrasive should be collected as early as possible. G. L. Buchanan will conduct the air sampling. JDR:gri cc M. T. Anderson . G. L. Buchanan / D. 0. Chrismer J. D. RANSDELL PLAINTIFF'S EXHIBIT t* t rv:+i#r*t- x LAM 016026 ' i;; - ' DPMC-12815 "T? H. M. Hedrick Company Apache Air Blast Abrasives APACHE-BLAST ABRASIVE Typical Chemical Analysis TLM S /o /o T S' S(c> / /o ,/s z .oS / /> .oS'(c) .Of 0.1 Iron............................................... 41.2% (FeO = 32.0, FeoO^j = 9.2%) Silicon........................................ 38.5 (no free silica) Aluminum.......................................... 9.41 (oxrd&) Calcium........................................ 6.1 Magnesium........................................ 1.51 mcrdc.) Zinc............................................. 1.46 Manganese.................................... 0.50 Copper........................................... 0.38 Titanium...................................... 0.18 Lead............................................... 0.015 Bariim........................................... 0.027 Tin................................................. 0.038 Gallium......................................... 0.011 Chromium...................................... 0.035 Nickel.......................................... 0.012 Molybdenum.................................. 0.032 Vanadium...................................... 0.006 Silver.......................................... 0.0011 Cobalt........................................... 0.015 Strontium.................................... 0.029 Gold............................................... 0.001 (not detected, less than) Platinum...................................... 0.002 (not detected, less than) Palladium.................................... 0.002 (not detected, less than) Rhodium......................................... 0.010 (not detected, less than) Ruthenium.................................... 0.010 (not detected, less than all other elements nil. Note: All the elements occur as complex silicates in the slag matrix. Some variances will occur with copper production; the above is certified as typical and representative. rn /K Tlv^ nvf, TLVA 74 .474 f- / .09<ft .Off .O/S-l -OWL j- ,/b 31(p rYXG^Im LAM 016027 DPMC-12816 li. M. Hedrick Conpany Apache Air Blast Abrasives APAGIE-BIAST ABRASIVE Typical Chemical Analysis TLV[ /o /o fO S SCc> / /o ./s o.s 2 , OS' / /0 .*sTc) . o/ o.i Iron............................................... Silicon........................................ Aluminum...................................... Calcium........................................ iHagnesium.................................... Zinc............................................. liinganese.................................... Copper........... .............................. Titanium...................................... Lead............................................... Barium.......................................... Tin................................................. Gallium........................................ Chromium...................................... Nickel.......................................... Kolybdenum......... ........................ Vanadium...................................... Silver.......................................... Cobalt........................................... Strontium.................................... Gold............................................... Platinum...................................... Palladium.................................... Rhodium........................................ Ruthenium.................................... 41.2% (FcO = 32.0, FeAj = 9.2%) 38.5 (no free silica) 9.41 (oxrJ&) 6.1 (V'<(y 1.51 t fZthk) 1.46 0.50 0.38 0.18 0.015 0.027 0.038 0.011 0.035 0.012 0.032 0.006 0.0011 0.015 0.029 0.001 (not detected, less than) 0.002" (not detected, less than) 0.002 (not detected, less than) 0.010 (not detected, less than) 0.010 (not detected, less than all other elements nil. Note: All the elements occur as conplcx silicates in the slag matrix. Some variances will occur with copper production; the above is certified as typical and representative. rr\ /X"fZv\A- f. *i- t TLV^ nv,, 7LV," y- Sl- y- r. .4U / ,3tr , .o9<ft ,.oif . 0 /i~/ 0/V6 . S' T (p rw ^ /rv, LAM 016028 DPMC-12817