Document ExzQaeqLDpeKnxLaEkp7oXGX4

' ~h r~ p v ~~ -i- r'N/ "1 lie Lxr'f. - if A ' - 3 PLAINTIFF'S EXHIBIT July 29, 1988 From: William Schrof - ETSO - DISTILLING To: Walter Harbuck - Supervisor Operations & Maint. - DISTILLING Subject: Instrumentation Cable Tray Fireproofing I have reviewed the condition of the D^/-2 cable tray which was fireproofed with insulation containing asbestos. Approximately 40% (300 sq. ft.) of the insulation has been damaged due to the cable tray being used as a walkway. To remove the damaged sheets of insulation ( 18 sheets 26in. x 96in. ) would cost $. .!/'while the cost to replace the insulation would be $ ~7 H . (j--T i ' , j-J.__ The instrument cable tray runs from the south end of the pump alley to the control room. Sheets of insulation that have been severely damaged are identified on the attached sketch. 4- < Above the cable tray are overhead cooling fans which enhance the chances of the asbestos becoming airbojrne. Cable trays^lirectly adjacent to the cable tray of concerrif wo*e--feunet-to have fire- proofing material (aoo sketch), on side S and has Flo T , X ^ Shell EGGS (17 EG~2) state that pneumatic and electrical instru mentation in hydrocarbon ^process areas shall he finpa'-ori i n- John.",--^ ^ ^ Manville Marinitey^jHlowcvcrT 3E believe^ that these standards cTe* U"T did not apply when the cable tray^ vtithout fireproofingVVex^ installed. As&esxoT, Due to the condition of some fireproofinesh^etso, I feel rtdr -\U. should" l'cjro f u"tjlre damaged material^Tf a decisioiPT.s made to replace the damaged top fireproofing cover, I feel we should use the Marinite I insulating board which should be sealed with undercoating and painted with epon ester gray. Also, some type of support (angle iron) under the top layer should be added for additional strength. The Marinite for the sides and bottom of the cable tray need not be replaced but must be sealed. I would like to meet with you to discuss my findings and plan a course of action. If additional information is needed please let me know. TL JI ^ [V J\. 1, lyfc k^JT Schref LAM 018190 DPMC-11360 Ureter,' From: William Schrof ETSO - DU1/DU2 To: Walter Harbuck, Operations Supervisor, DU1/DU2 Di Mai, Instrument Engineer Subject: Instrumentation Cable Tray Fireproofing An Instrument Cable Tray in DU-2 was fireproofed with a material that contained asbestos. As a result of the cable tray being used as walkway, the top fireproofing cover has been severely damaged in specific areas along the cable tray creating a concern over the exposure of asbestos fibers (see sketch for the location of damaged fireproofing sheets). Approximately 40% of the fireproofing (approximately 18 sheets 26in. x 96in.) material has been severely damaged. Recommendations The damaged asbestos fire protection material must be removed (approximately 300 sq.ft.). Sheets of insulation near the south end of the cable tray have been broken into large pieces. These large pieces can be dislodged by heavy wind or the cable tray being used as a walkway again. Whatever the circumstances this is a potential hazard to employees below the tray. The potential of the asbestos fiber becoming airborne is enhanced due to the location of overhead air cooling fans. As to whether the damaged material should be replaced and if replaced what fire and thermal protective material should be installed is what I would like to discuss with you. Shell EGGS (17 EG-2) state that pneumatic and electrical instrumentation in hydrocarbon process areas shall be encased in Johns Manville Marinite insulating board. These process areas would include regions with high fire risks, hot piping manifolds etc. However, after a thorough walkdown of the unit, I found none of the cable trays directly adjacent to the cable tray of concern to have any fireproofing material. If we do decide to replace the fireproofing material, I feel we should use the Marinite insulating board. The Marinite for the top of the cable tray should be sealed with undercoating and painted with epon ester gray. Also, some type of support (angle iron) under the top layer of the Marinite should be added for additional strength. The Marinite for the sides and bottoms need not be leplaced but must be sealed. The cost to remove the existing fireproofing material is approximately . The cost of 18 sheets of Marinite, accessories, and labor is approximately LAM 018192 DPMC- 11862 Sheets s s o o a b e: sheet 5 square r i a. 1 La-bor" c>i~n p le.+. ^i.mov'A. I L 5 > \ >he.c: + &j M E-f / rfa.n\/i)I. Ac.C-e.SSO r-i g & - = I~7D r~>) -i-t 3T 2^4-CrO " t4 " ) = S'j `2-Of> $-p\a-c^. b.A-bar' IH H) = IIS' ~ & l~1 4 ,^ t-J '2-aJu-o~^J ~ 2.. 5" E"7 ) LAM 018193 DPMC-11863 SQUARE LAM 018194 DPMC-11664 DPMC-11865 Du-Z FovoE)^ Ca^&ue Tr/^/ With Asbestos Fire Project,oh 1 - boo' ; ZO - 2- ~ 3o.o// 9 2.6- 3 - izb i 1 2-" - 4- 106/y : 9 A4' - 5- 30 nLbi>l> OHLY EHCLO&I> 772 y ! F-4.7/ 7: \_______ / COW 772 oL ; RoofA 10 F-L23 _3_____/ WSoa-TK typo-3) FtJEW*C zo' (t*?pfij>Y' DimewSio/js anl zizszs) I iI i LAM 018196 i DPMC-11866 1-10-6 7 July 29, 1988 From: William Schrof - ETSO - DISTILLING To: Walter Harbuck - Supervisor Operations & Maint. - DISTILLING Subject: Instrumentation Cable Tray Fireproofing I have reviewed the condition of the DU-2 cable tray which was fireproofed with insulation containing asbestos. Approximately 40% (300 sq. ft.) of the insulation has been damaged due to the cable tray being used as a walkway. To remove the damaged sheets of insulation (20 sheets 26in. x 96in.) would cost $ 2.5 M while the cost to replace the damaged insulation would be $ 10 M. The instrument cable tray runs from the south end of the pump alley to the control room. Sheets of insulation that have been severely damaged are identified on the attached sketch. Above the cable tray are overhead cooling fans which enhance the chances of the asbestos becoming airborne. Cable tray B directly adjacent to cable tray C (see sketch) contains fireproofing material on the sides and bottom but has no top cover. Cable tray A contains no fireproofing material. Shell EGGS (17 EG-2) state that pneumatic and electrical instru mentation in hydrocarbon process areas shall be encased in Johns Manville Marinite. However, it is believed that this standard did not apply when the cable trays without fireproofing were installed. Due to the condition of some fireproofing sheets, I feel that the damaged material should be removed. If a decision is made to replace the damaged top fireproofing cover, I feel that we should use the Marinite I insulating board which should be sealed with undercoating and painted with epon ester gray. Also, angle iron supports attached to the cable tray on two foot centers under the top layer of Marinite will give additional strength. The Marinite for the sides and bottom of the cable tray need not be replaced but must be sealed. If a decision is made to remove all of the existing fireproof insulation eliminating the concern over asbestos, the total cost would be approximately $ 6 M. Complete replacement of all fireproof insulation with Johns Manville Marinite I would cost approximately $ 18 MLtVy Cr-;_-r 'o ^ ..... --. LAM 018197 DPMC-11867 With this information, I would like to meet with you to discuss a course of action. If additional information is needed please let me know. Cx).t t i , William Schrof &r. cc : R. L. Jacoby D. G. Jaegar D. E. Grace G. Vasques ROB SATELLITE LAM 018198 DPMC-11668 DPMC-11869