Document M4d48Mjvo76O6N5V3bVpdpNb9

Company WWN9 'VlaICa. P. 0. is* . Maw Highway 29 Afcamaan. MasMff* 39730 (601) 3*4111 August 15, 1983 Mr. Jerry B. Banks* P. E. Mississippi Dapartnsnt of Natural Basources Bureau of Pollution Control P. 0. Box 10385 Jackson* MS 39209 Dear Mr. Banks: As you are aware, EPA has approved the Look Detection and Eliaination Plan for Conoco's Aberdeen, MS FVC Plane. The approval letter states that "any changes in the monitoring specifications and operating procedures as subaltted should receive prior written approval froe EPA". In the near future Conoco intende te relocate several of the fixed point monitoring systea sample locatiooe* therefore written approval of thesa changes is requested from the Mieeieeippl Departaent of Natural Resources. A listing of the pfepeesd saeple locotions is attached. As part of these changes, the existing incinerator exhaust saeple stream (presently streaa No. 3, old functor nodule GC) will be ellalaated. A new gas chronatograph (GC) is lelng Installed to monitor the incinerator exhaust, exclusively. The nfv incinerator exhaust GC is similar in construction and operation te the other four GCs, therefore Conoco intends to maintain and calibrate the new GC in accordance with current Plant practices. Our emperlaolse has indicated that a weekly span check is more than suffleiant to maintain a reliable degree of GC calibration accuracy. EPA has concurred with this view, and a weakly span check of the existing GCs was approved by IPA la the Leak Detection and Elimina tion Plan. Since the new incinerator exhaust GC will be regulated under 40 CFR 61.68 (Emission monitofing), and not under 40 CFR 61.65 (b)(8) (Leak Detactlon and ElinAastlfn), it ia requested that the Mississippi Department of 'Natural Raaoureea approve e weekly span check of the new Incinerator exhaust GC. Pleasa note that the existing incinerator exhaust GC (old reactor module GC) is currently being span checked weekly, therefore approval of this request will not result in less strin gent emission monitoring than what is currently done. If you have any questions concerning this request, please do not hesitate to call me at (601) 369-8111, extension 2285. Sincerely Dave Mahler Environmental Engineer be: JF, RAF, JCL DTH 000087738 \ Baiicar*5nloediiig CoanNor Shed 2. North VCM Bailcar Unloading Station 3. North Middle VCM Bailcar Unloading Station 4. South Middle VCM lailear Unloading Station 3. South VCM Baiicar Unloadlot Station 6. VCM Storage Sphere 7. ^talaaion Bacovary Syeten, Upstairs 8. VEnission Bacovary Syatau, Downstairs 9. No. 8 Dryar Bland Tanka 10. Procass Control Boon cc.JteA.ir. W iMftlOTJtortWf 1.Praah VCM Baelvar 2. North BVCM Baceiver 3. Larga Bacovary Syeten, Downotalrs 4. Larga Bacovary Syatan. Upataira 5. Baactor Dunp Svwco 6. Botton of D-300 Baactor 7. Top of MOO Baactor 8. Botton of D-500 Baactor 9. Top of D-600 Baactor 10. Botton of D-700 Baactor GC Mo. 3 - Now Baactor Modulo 1. Botton of 741 Baactor 2. Top of 742 Baactor 3. Botton of 743 Baactor 4. Top of 744 Baactor 5. Botton of 745 Baactor 6. Baactor Dunp Swoco 7. Bacovary Syatan* Downotalrs 8. Middle VCM Bacalvar 9. Blowdown Tank . 10. Becovery Syatan* Upataira GC No. 4 - Lab 1. front Guard Houaa 2. Malntanaaca Shop 3. No. 1 Dryar Bland Tanka 4. Quality Control Lab. 5. GC Lab. 6. South of Plasticizer Building 7. Compound Lina I 8. Dry Blend Building 9. Front Offices 10. Plant Breathing Air > 000087739