Document Ed4NzKQZRYmej5wQx8eMneqQ4

MEMORANDUM SUBJECT: CLEAN AIR ACT INSPECTION REPORT Valero St. Charles Refinery, Norco, Louisiana FROM: Constantinos Loukeris, Environmental Engineer AECAB (MI/WI) THRU: Sarah Marshall, Section Supervisor AECAB (MI/WI) TO: File BASIC INFORMATION Facility Name: Valero St. Charles Refinery Facility Location: 14902 River Rd, Norco, LA 70079 Date of Inspection: November 6-9, 2023 EPA Inspector(s): 1. Constantinos Loukeris, Environmental Engineer 2. Jason Schenandoah, Environmental Engineer 3. James Haynes, Physical Scientist 4. Ben Rosenthal, Physical Scientist Other Attendees: 1. Nathan Ward, Louisiana, DEQ 2. Ashley Cessac, Louisiana DEQ, Inspector 3. Mary Claire Petit, Valero, Environmental Manager 4. Derek Bessler, Valero, Director of Environmental/Safety Affairs 5. Margaret Hamilton, Valero, BWON Lead/Coordinator 6. Tal Logbck, Valero, Corporate Environmental 7. Cody Sheets, Valero, Unit Superintendent 8. Jim Holsapple, Valero, Complex Manager 9. Scott Burton, Valero, Environmental Specialist 10. John Gautreaux, Montrose Environmental 11. Rachel Dickerson, Valero, Environmental Specialist 12. Jennifer Barraco, Valero 13. Mike McLeod, Valero 14. Travis Bourgeios, Valero, Alky Superintendent 15. Troy Rhodes, Valero, Complex Manager 16. Andy Rivere, Valero, Coker Superintendent Contact Email Address: MaryClaire.Petit@valero.com Purpose of Inspection: Inspect the benzene waste operations and volatile organic compounds (VOC) emissions from wastewater systems Facility Type: Petroleum Refinery Regulations Central to Inspection: Refinery wastewater subject to the New Source Performance Standards for VOC Emissions from Petroleum Refinery Wastewater Systems, at 40 C.F.R. Part 60, Subpart QQQ (Subpart QQQ), and the National Emissions Standards for Hazardous Air Pollutants for Benzene Waste Operations, at 40 C.F.R. Part 61, Subpart FF (Subpart FF) Arrival Time: November 6, 2023, 8:50 AM Departure Time: November 9, 2023, 1:45 PM Inspection Type: Unannounced Inspection Announced Inspection OPENING CONFERENCE Presented Credentials Stated authority and purpose of inspection Small Business Resource Information Sheet not provided. Reason: Not a Small Business Provided CBI warning to facility The following information was obtained verbally from Valero personnel unless otherwise noted. Page 2 of 7 Process Description: Valero provided a brief overview of the benzene wastewater operations at the St. Charles Refinery as well as individual drain system equipment and oil-water separators used for managing VOC wastewater. The St. Charles Refinery is broken up into the East Plant and West Plant. The East Plant is where wastewater is managed. Valero operates six docks, of which Dock#2 generates a benzene containing wastewater stream. Valero operates three API oil-water separators (API OWS). Vapor emissions from the API OWS are routed to a carbon adsorption system. The normal vent route is to a 2,000-pound carbon system; however, from September 2023 through EPA's November 2023 inspection, that system has been down for maintenance. A temporary carbon canister system has been assembled consisting of three 55-gallon carbon canister drums in series. The St. Charles Refinery is complying with the 6 Megagram per year compliance option under Subpart FF. Valero indicated that there is no active judicial Clean Air Act consent decree for this refinery and that the most recent decree was terminated in 2018. In 2011/2012, Valero installed two Poseidon-modeled dissolved gas flotation (DGF) units. All controlled vacuum trucks are monitored visually quarterly and with Method 21 annually. TOUR INFORMATION EPA Toured the Facility: Yes Data Collected and Observations: x EPA conducted breakthrough monitoring using Thermo Scientific's Toxic Vapor Analyzers, Model 2020, equipped with a flame ionization detector between the primary and secondary and secondary and tertiary carbon drums, as well as the outlet of the tertiary carbon drum with results as follows: primary canister outlet: 81 parts per million (ppm), secondary canister outlet: 20 ppm, and tertiary canister outlet to atmosphere: 15 ppm. The carbon canister system receives a vent stream that has nitrogen blanketing. Valero uses a photo-ionization detector when conducting breakthrough monitoring on the carbon canisters. x Valero labeled the drips and drab lift station as subject to Subpart QQQ at the base; however, the flare header line located above the lift station was labeled as subject to Subpart FF. x EPA observed visible defects on vacuum breaker located on the roof of tank, TK-13-16, which is a sphere. x EPA monitored the guidepole on floating roof tank, TK-13-15, and detected 40 ppm. x EPA walked on the platform above the enhanced biodegradation unit (EBU). Approximately 4-6 feet away from the C-grate inlet, personnel hydrogen sulfide alarms sounded at 20 ppm. EPA monitoring equipment detected 100 ppm at that same spot. Valero routes the effluent of the DGFs to the EBU; however, the line is an open sewer Page 3 of 7 line that is not submerged fill. In addition, Valero routes a recirculation line from the Ctanks. x EPA took four pictures at the East Plant sump that identified visible defects at multiple locations in addition to detecting emissions from those visible defects ranging from 1,700-6,300 ppm. x EPA observed a kid-sized pool full of oil next to P-04-118-A strainer/oil-skimmer sump. x Valero operates bypass vents on the API OWS A, B, and C that have a car-seal on the bypass valve. However, EPA observed detectable emissions testing with Method 21, and also recorded infrared images using a FLIR optical gas imaging camera. x EPA conducted a walkthrough of the North 40 sump, which receives tank water draws from the liquefied petroleum gas bullet tanks. The piping was labeled as "FF/BWON Inspection and QQQ Inspection." Valero personnel were unclear which standard applied to this sump. x Valero reported a total annual benzene (TAB) under 10 Megagrams per year until 2021, however, they reported >10 Megagrams per year for 2022. Valero indicated that the TAB report was not being performed correctly in all was inaccurate for prior years. x EPA observed the MSAT sump to have visible defects including multiple holes on each side of the concrete. EPA was able to place the monitoring probe into the holes at least 2 inches. x EPA observed the oil-tank centrifuge located near the coker injection area to have visible steam and hydrocarbon emissions venting from the cover of the centrifuge with detectable emissions at 35,000 ppm. x Valero indicated that the old API West and associated sump been taken out of service and isolated in 2009; however, it was unclear from Valero how much waste was still in the API. EPA detected 5,000-7,800 ppm from multiple interfaces on the API cover and sump. Photos and/or Videos: were taken during the inspection and are listed in Appendix A. EPA imaged hydrocarbon emissions using a FLIR optical gas imaging camera, Model GFx320. In addition, this camera was also used to take digital pictures and videos. See Appendix A for the summary of the videos and pictures taken. Field Measurements: were taken during this inspection and are listed in Appendix B. 1. EPA conducted Method 21 monitoring and testing using Thermo Scientific's Toxic Vapor Analyzers, Model 2020, equipped with a flame ionization detector. See Appendix B for the summary of the monitoring and testing. EPA also collected six summa canisters that were analyzed per Method TO-15 by Eastern Research Group, a contractor to EPA. The results of the summa canisters are attached in Appendix D. CLOSING CONFERENCE Provided U.S. EPA point of contact to the facility Page 4 of 7 Requested documents: 1. 5 years of Subpart FF quarterly and annual reports 2. 5 years of TAB reports 3. NESHAP FF visual inspections, paper logs since July 2023 4. 5 years of Subpart QQQ quarterly reports 5. Subpart QQQ visual inspections, paper logs since July 2023 6. LeakDAS backup files 7. Engineering design documents for all NEHSAP FF waste management units 8. 3 years of quarterly end of line sampling 9. End of line Drawing and sampling plan 10. Last API 653 inspection for NESHAP FF and Subpart QQQ tanks 11. Last primary seal gap measurements for all NESHAP FF and Subpart QQQ floating roof tanks 12. Carbon canister breakthrough monitoring for all systems 13. Last annual secondary seal gap measurement for NESHAP FF and Subpart QQQ floating roof tanks Concerns: At the closing conference, EPA identified the follow areas of concern: Subpart QQQ 1. Based on the number of visible observations, Valero does not properly conduct visual inspections of all equipment in each individual drain system. 2. Valero does not maintain the covers without visual defects (e.g., EPA observed cracks/gaps and peeled off caulk and in some instances missing seals/bolts). 3. Valero had several missing covers, dry drains, and oil in various drain hubs. Subpart FF 4. Valero has not designed and operated all of its waste management units controlled for Subpart FF, including the following units: three API oil/water separators, dissolved gas flotation units, lab sump, not a submerged fill into the aeration basins, coker injection, vacuum truck sump, and the following tanks: 13-15, 13-16, 100-2, and 180-9. 5. Valero may not be meeting the 6 Megagram (6 BQ) compliance option based on several of the waste management units identified as controlled by Valero that were not controlled and had not been designed to be controlled. 6. Valero has not identified all points of generation. 7. Valero reported a TAB under 10 Megagrams per year until 2021, and reported greater than 10 Megagrams per year for 2022 (65 Megagrams). Valero indicated that the TAB was inaccurate for prior years. 8. Valero may not be maintaining any engineering design documentation required in 40 C.F.R. 61.356(d). Page 5 of 7 9. Valero self-reported repair attempts with a water rinse repeatedly, and in many instances the equipment tested had detectable emissions at the next testing interval. Water rinse is not an acceptable repair methodology. 10. Valero should not be using the enhanced biodegradation unit exception of less than 10 ppm benzene that is allowed under the 6 BQ compliance option, since all waste management units upstream were not tested, designed and operated with no detectable emissions (NDE), including the lack of submerged fill for the individual drain system into the aeration basins. DIGITAL SIGNATURES CONSTANTIN CONSTANTINOS LOUKERIS Digitally signed by Report Author: __O_S__L_O__U_K_E_R__IS__-05_'0_0' ________________ Date: 2025.06.04 07:24:55 Section Supervisor: SARAH Digitally signed by SARAH MARSHALL Date: 2025.06.04 ___M__A_R__S_H__A_L_L___07_:3_1:_31_-0_5_'00_' ___________ Page 6 of 7 APPENDICES 1. Appendix A: Digital Image/Video Log 2. Appendix B: Field Measurement Data 3. Appendix C: Visual Observations 4. Appendix D: Summa Canister Results Page 7 of 7 Facility Name: Valero St. Charles Refinery Facility Location: 14902 River Rd, Norco, LA 70079 Date of Inspection: November 6-9, 2023 APPENDIX A: DIGITAL IMAGE/VIDEO LOG 1. Inspector Names: James Haynes and Ben Rosenthal 2. Archival Record Location: C:\Users\Cloukeri\OneDrive - Environmental Protection Agency (EPA)\EPAWork\Valero Norco\Valero Norco - Internal Folder - Case File\Valero Norco Photo Log - November 2023 Inspection\VSCR - Photos and Videos Image Number Number 1 2 3 4 5 6 7 8 File Name File Name R0010224 R0010225 R0010226 R0010227 R0010228 R0010229 R0010230 R0010231 9 R0010232 10 R0010233 11 R0010234 12 DC_309 13 DC_311 Date Date 11/6/2023 11/6/2023 11/6/2023 11/6/2023 11/6/2023 11/6/2023 11/6/2023 11/6/2023 11/6/2023 11/6/2023 11/6/2023 11/7/2023 11/7/2023 Image Description Description Accidental photo "FF BWON Inspection" labeled vent pipe at API "QQQ Inspection" labeled vent pipe at API P-13-013-B. Accidental photo Filter dripping liquid. Oily stains. Near valve tagged 000933. Same as R0010229. Ladder base plate/flange on Tank TK-13-13. Degraded caulk, white arrow pointing to measured NDE exceedance. Close to Tag 000702. Degraded caulk, white arrow pointing to measured NDE exceedance. Close to Tag 000702. Vacuum breaker on API SE 1307-B. Exceedance on vacuum side. D-943-108 oily water sump. "QQQ Inspection" labeled sump cover Appendices Page 1 of 12 Facility Name: Valero St. Charles Refinery Facility Location: 14902 River Rd, Norco, LA 70079 Date of Inspection: November 6-9, 2023 14 DC_312 11/7/2023 Catch basin with grate and boom. 15 MOV_0313 11/7/2023 Catch basin with grate. Detectable emissions. 16 DC_314 11/7/2023 Cleanout with debris. 17 DC_315 11/7/2023 Q186 leak tag. 18 DC_316 11/7/2023 Q186 with detectable emissions. Old stormwater QQQ sump with detectable 19 DC_317 11/7/2023 emissions. Old stormwater QQQ sump with detectable 20 DC_318 11/7/2023 emissions. Old stormwater QQQ sump with detectable 21 DC_319 11/7/2023 emissions. Old stormwater QQQ sump with detectable 22 DC_320 11/7/2023 emissions. Old stormwater QQQ sump with detectable 23 DC_321 11/7/2023 emissions. Old stormwater QQQ sump with detectable 24 DC_322 11/7/2023 emissions. 25 MOV_0323 11/7/2023 Old stormwater QQQ sump gooseneck vent. Old stormwater QQQ sump with detectable 26 DC_324 11/7/2023 emissions. Old stormwater QQQ sump with detectable 27 DC_325 11/7/2023 emissions. Hole in asphalt next to old stormwater QQQ 28 DC_326 11/7/2023 sump. Elevated emissions. 29 DC_327 11/7/2023 Fuel gas line leak from open pipe in Unit 37. 30 MOV_0328 11/7/2023 Fuel gas line leak from open pipe in Unit 37. 31 MOV_0329 11/7/2023 P37-504 detectable emissions in Unit 37. 32 DC_330 11/7/2023 P37-504 detectable emissions in Unit 37. 33 DC_331 11/7/2023 P37-503 detectable emissions in Unit 37. Appendices Page 2 of 12 Facility Name: Valero St. Charles Refinery Facility Location: 14902 River Rd, Norco, LA 70079 Date of Inspection: November 6-9, 2023 34 MOV_0332 11/7/2023 P37-503 detectable emissions in Unit 37. 35 DC_333 11/8/2023 Sump in "North 40" area. 36 DC_334 11/8/2023 Sump in "North 40" area. 37 DC_335 11/8/2023 Sump in "North 40" area. 38 DC_336 11/8/2023 Q050 visual defect at pipe. 39 DC_337 11/8/2023 CB30 dirt and debris. 40 DC_338 11/8/2023 CB31 partially dry with mud on top. 41 DC_339 11/8/2023 Q99 sump with cracked and peeled sealant. 42 DC_340 11/8/2023 Q99 sump with cracked and peeled sealant. 43 DC_341 11/8/2023 Q99 sump with cracked and peeled sealant. 44 R0010235 11/8/2023 Catch basins in Cat Unit with dirt/debris. 45 R0010236 11/8/2023 Catch basins in Cat Unit with dirt/debris. 46 R0010237 11/8/2023 Catch basins in Cat Unit with dirt/debris. 47 R0010238 11/8/2023 Catch basin drain in Cat Unit with oil. 48 R0010239 11/8/2023 Catch basin drain in Cat Unit with oil. Sump 74 QQQ degraded caulk, pump plates, 49 R0010240 11/8/2023 and gaps. Sump 74 QQQ degraded caulk, pump plates, 50 R0010241 11/8/2023 and gaps. Sump 74 QQQ degraded caulk, pump plates, 51 R0010242 11/8/2023 and gaps. Sump 74 QQQ degraded caulk, pump plates, 52 R0010243 11/8/2023 and gaps. 53 R0010244 11/8/2023 Accidental photo 54 R0010245 11/8/2023 Sump 74 QQQ cover of sump with gaps. 55 R0010246 11/8/2023 Accidental photo 56 R0010247 11/8/2023 Breaker drain filled in with debris. DB-53-05 Appendices Page 3 of 12 Facility Name: Valero St. Charles Refinery Facility Location: 14902 River Rd, Norco, LA 70079 Date of Inspection: November 6-9, 2023 57 R0010248 11/8/2023 Detectable emissions at skid in Coker Unit. 58 R0010249 11/8/2023 Detectable emissions at skid in Coker Unit. 59 R0010250 11/8/2023 Coker feed tank hatch. Detectable emissions. Other coker feed tank hatch on smaller tank. 60 R0010251 11/8/2023 Detectable emissions. Other coker feed tank hatch on smaller tank. 61 R0010252 11/8/2023 Detectable emissions. Rear photo of other coker feed tank hatch on 62 R0010253 11/8/2023 smaller tank. 63 R0010254 11/8/2023 Sump with holes in P-53-161 pump plate. Rear photo of detectable emissions at skid in 64 R0010255 11/8/2023 Coker Unit. Sewer cover in Coker Unit. Detectable 65 R0010256 11/8/2023 emissions. 38-08 oil water separator cover with detectable 66 R0010257 11/8/2023 emissions. 38-08 oil water separator cover with detectable 67 R0010258 11/8/2023 emissions. 38-08 oil water separator cover with detectable 68 R0010259 11/8/2023 emissions. IR image of other coker feed tank hatch on 69 IR_342 11/8/2023 smaller tank. 70 MOV_0343 11/8/2023 Other coker feed tank hatch on smaller tank. Emissions from cooling tower next to coker 71 MOV_0344 11/8/2023 unit. 72 MOV_0345 11/9/2023 T 100-2 emissions with OGI. 73 MOV_0346 11/9/2023 T 100-2 emissions with OGI. 74 MOV_0347 11/9/2023 T 180-9 emissions with OGI. 75 DC_348 11/9/2023 Vacuum truck sump cover with cracks and gaps. Appendices Page 4 of 12 Facility Name: Valero St. Charles Refinery Facility Location: 14902 River Rd, Norco, LA 70079 Date of Inspection: November 6-9, 2023 76 DC_349 11/9/2023 77 DC_350 11/9/2023 78 DC_351 11/9/2023 79 DC_352 11/9/2023 80 MOV_0353 11/9/2023 81 DC_355 11/9/2023 82 R0010260 11/9/2023 83 R0010261 11/9/2023 84 R0010262 11/9/2023 85 R0010263 11/9/2023 86 R0010264 11/9/2023 87 R0010265 11/9/2023 88 R0010266 11/9/2023 89 R0010267 11/9/2023 APPENDIX B: FIELD MEASUREMENT DATA Oil on plug below valve Tag #2235. Stormwater pipe. Catch basin with drain. Catch basin with drain. Manhole #2 next to QQQ sump in north end of crude unit. Manhole #2 next to QQQ sump in north end of crude unit. QQQ sump in north end of crude unit showing deteriorated sealant and gaps. QQQ sump in north end of crude unit showing deteriorated sealant and gaps. Manhole #2 next to QQQ sump in north end of crude unit. QQQ sump in north end of crude unit showing deteriorated sealant and gaps. PRV on oil water separator following desalters. Preparation for maintenance on oil water separator following desalters. "QQQ INSP" labeled sump in crude unit. "QQQ INSP" labeled sump in crude unit. The table below summarizes the field measurements by EPA conducting Method 21 with a Thermo Scientific Toxic Vapor Analyzer, Model 2020, and when available, confirmed by Valero. Component ID API A Cover API A Cover Equipment Type Emergency PRV North Emergency PRV South EPA's Reading (ppm) 1,350 Valero's Reading (ppm)* 1,900 320 270 Appendices Page 5 of 12 Additional Notes - Facility Name: Valero St. Charles Refinery Facility Location: 14902 River Rd, Norco, LA 70079 Date of Inspection: November 6-9, 2023 API B API B API B Tag# 000688 Oil Roll Skimmer Drive Tag# 000699 API B API B API B API C DGF 13-110-A DGF 13-110-A DGF 13-110-A Lab - South Sump Lab - South Sump TK-13-16 TK-13-16 East Plant Sump East Plant Sump East Plant Sump East Plant Sump EBU Inlet API A API B API C API A API B API C Coker - West Plant Tag# 000704 Vacuum Side (PVRV) Tag# 000691 Tag# 000761 Gasket Manway Gasket Gasket Manway Sphere tank, Vacuum breaker Sphere tank, PSV West Pump Manway East Pump Manway Plate Gooseneck Vent About 6 feet from surface (Cgrate inlet) Bypass Vent E Bypass Vent E Bypass Vent E Bypass Vent W Bypass Vent W Bypass Vent W Manhole 1,455 >10,000 3,720 714 4,515 3,491 la1,371 861 >10,000 2,800 6,840 9,114 30,000 8,000 5,700 2,700 6,300 1,700 100 102 1,448 1,200 25 257 380 8,000 1,300 2,866 SEM-13-078 5,500 1,200 4,400 North side gasket, middle - 2,945 1,300 1,200 2,800 3,300 6,000 13,000 West middle seam Visual leak from bolt nut Main gasket, west Multiple visual leaks Main gasket, north Closest Tag# 2735 Center manway Emissions to Atmosphere 5,700 2,100 Emissions to Atmosphere Cover plate on pump manway is uneven - 6,000 - - Confirmed Confirmed 6,888 Bubble in plate Cover for entire sump was not flat Hydrogen Sulfide (H2S) alarm went off at 20 ppm H2S Using extension probes Visually not sealed Appendices Page 6 of 12 Facility Name: Valero St. Charles Refinery Facility Location: 14902 River Rd, Norco, LA 70079 Date of Inspection: November 6-9, 2023 Coker - West Plant Tank 1004 Tank 1004 Tank 1002 Oil-tank Centrifuge Thief Hatch Manway Manway Tank 1000 Tank 1000 Tank 1001 Tank 1001 Tank 1001 Old API Sump Thief Hatch Manway Agitator Lid Agitator Plate, Missing Bolt Manway Cover - Spot 1 Old API Sump Cover - Spot 2 Old API Sump Cover - Spot 3 T325.2 CB Q81.16 Q99 Sump Q99 Sump Q050 Old Stormwater Sump Old Stormwater Sump Water Draw Pump Cover - Spot 1 Cover - Spot 1 Gooseneck Vent Bolt missing Pump 35,000 3,800 6,200 19,000 1,000 1,200 19,700 6,400 1,700 7,800 5,500 5,300 1,078 10,600 711 626 1,600 1,900 1,900 32,000 5,200 5,300 34,000 Confirmed 870 28,200 1,700 Visible steam/hydrocarbon venting out on cover Visible steam/hydrocarbon venting out Oil on and around thief hatch - 670 7,100 5,200 5,600 1,800 Valero indicated the equipment is out of service, visible defects Valero indicated the equipment is out of service, visible defects Valero indicated the equipment is out of service, visible defects Visible liquid present 2,089 1,000 Confirmed Confirmed Visible seal cracking/caulk peeled off Visible seal cracking/caulk peeled off - 1,750 1,400 Missing multiple bolts/opening and caulk peeled off - Appendices Page 7 of 12 Facility Name: Valero St. Charles Refinery Facility Location: 14902 River Rd, Norco, LA 70079 Date of Inspection: November 6-9, 2023 Old Stormwater Sump Old Stormwater Sump Old Stormwater Sump Old Stormwater Sump Old Stormwater Sump Old Stormwater Sump Unit 3700 Unit 3700 Unit 3700 Unit 1600, V16101 Unit 1600 Unit 1600 Q186 Vac Truck Sump Next to Gooseneck Vent Missing caulk around P-04950A under inflow pipe Gooseneck Vent Right of E. Pump (P04- 950A) Left of E. Pump (P04-950A) SW corner where metal meets crack STK# 402892 (P37-503) 1st Pump Bolt P37-504 (manhole cover pin) STK# 402892 (P37-503) 2nd Pump Bolt LDAR 086 (Nitrogen Connect OEL) P67-503, DEA Sump Pump P67-503, DEA Sump Pump, other side Cover Spot #1 Vac Truck Sump Vac Truck Sump Cover Spot #2 Cover Spot #3 1,000 1,400 2,800 2,300 2,200 620 90,000 62,000 90,000 40,000 (flameout) 3,500 1,300 1,200 5,700 4,000 830 1,600 - 1,600 - 2,000 - 2,200 - 2,000 - 1,800 - 113,000 - 73,000 - 113,000 - Confirmed Valero confirmed with FLIR video 5,000 - Confirmed - 750 5,700 1,400 446 Main gasket, cracked caulking/holes - Appendices Page 8 of 12 Facility Name: Valero St. Charles Refinery Facility Location: 14902 River Rd, Norco, LA 70079 Date of Inspection: November 6-9, 2023 Vac Truck Sump Cover Spot #4 Vac Truck Sump Vac Truck Sump Vacuum breaker, Tag#1634A Carbon Canister 2,571 1,430 1,060 Oily Water Sump Drain Hub Kerosene Pump Splitter Bottom Pump Splitter Bottom Pump North 40 North 40 North 40 Crude Crude D-943-108 Stripper Bottom Pump, P-943-006B P-943-013A P66-17B P66-17A Sump Vent Pipe Northwest corner LDAR Tag# 584 (Strainer) Manhole #2 Plate cover where pump was removed 2,300 900 693 600 1,600 1,700 520 1,078 2,900 1,800 1,978 670 Main gasket, cracked caulking/holes - 3,300 1,000 - Montrose confirmed using Microrae, Carbon canister tagged in March 2023 for most recent replacement - 719 - 1,800 2,300 3,500 Technician had left Technician had left - - - APPENDIX C: VISUAL OBSERVATIONS The table below summarizes the visual inspection observations made by EPA. Component ID or Unit CB053-02 P053-02B P053-02C CB053-08 Component Type Catch basin Drain Drain Catch basin Visual Observation Oil Sheen Oil drain clogged Oil drain clogged No cover Additional Notes 127 ppm open area Appendices Page 9 of 12 Facility Name: Valero St. Charles Refinery Facility Location: 14902 River Rd, Norco, LA 70079 Date of Inspection: November 6-9, 2023 CB053-18 053 Unit Coker Coker Coker Coker Coker Coker Coker Coker Coker Hydrocracker Hydrocracker Hydrocracker Hydrocracker Hydrocracker Hydrocracker Hydrocracker Hydrocracker Hydrocracker Hydrocracker Hydrocracker Hydrocracker Hydrocracker Hydrocracker Hydrocracker Hydrocracker Hydrocracker Hydrocracker Hydrocracker Hydrocracker Catch basin Drain 1 DB-53-05 71-66 LDAR Tag# 3599 LDAR Tag# 3598 71.59 Drain 80 Drain 90 Drain 92 Drain 95 Drain (P943037B) Drain Q112 Drain Q116 Drain Q117 Drain Q118 Drain Q122 Drain Q119 Drain Q120 Drain Q123 Drain Q124 Drain Q125 Drain Q127 Drain Q130 Drain Q132 Drain Q133 Drain Q134 Drain Q136 Drain 137 Drain 139 Drain Q140 Oil in Puddle immediately near basin Oil drain clogged Filled with debris Oily Oily Oily Oily sheen Not covered Oil drain clogged Not covered Oil drain clogged Oily Oily 700 ppm/confirmed at 1,100 ppm Oily/Crystal layer 8,000 ppm/5,200 Oily Oily Oily (lube oil pump drain) Oily Oily and Debris Oily Oily and debris Oily and debris Oily and particles floating Oily and half sludge Dry Drain Oily and sludge Oily and mud Oily Oily, but mostly sludge Appendices Page 10 of 12 - - - - - D943-015, 2nd Stage Feed Surge Drum drain - - - Facility Name: Valero St. Charles Refinery Facility Location: 14902 River Rd, Norco, LA 70079 Date of Inspection: November 6-9, 2023 Hydrocracker Hydrocracker Hydrocracker Hydrocracker Hydrocracker Hydrocracker Hydrocracker CB-13 CB-23 CB-28 P-53-161 pump plate Crude Crude Crude Drain Q142 Drain Q161 Drain Q163 Drain Q175 Sump Q 175 Q 173.02 Q186 Drain Drain Drain Sump Separator Bypass Lines After Desalter Drain Hub 12 Drain Dry with some oil present on walls Dry with some oil present on walls White liquid filled Oily No seal around/pinhole opening 1,200 ppm/750 ppm Clogged with debris Oily Oily Hole in sump cover north side Missing car seals Oil Dry Drain - - - EPA confirmed the M21 reading - - Two identified as dry drains, but identification not provided by Valero Appendices Page 11 of 12 Facility Name: Valero St. Charles Refinery Facility Location: 14902 River Rd, Norco, LA 70079 Date of Inspection: November 6-9, 2023 APPENDIX D: SUMMA CANISTER RESULTS SEE ATTACHED PDF Appendices Page 12 of 12 CERTIFICATE OF ANALYSIS OECA 2890 Woodbridge Avenue Edison, NJ 08837 ATTN: Shaun Burke PHONE: (202) 564-1039 FAX: (732) 321-6616 FILE #: 0453.14.003.120 REPORTED: 01/16/24 16:04 SUBMITTED: 11/15/23 AQS SITE CODE: SITE CODE: Valero Norco Inspection ANALYTICAL REPORT FOR SAMPLES SampleName LabNumber Old API - out of service - near c3o1k1e1r622-01 Aeration Basin 3111622-02 943-Q118 Drain 3111622-03 Pump P37-503 bolts 3111622-04 Coker injection centrifuge 3111622-05 Manhole # 2 in crude unit 3111622-06 Matrix Air Air Air Air Air Air Sampled 11/08/23 04:25 11/07/23 16:28 11/07/23 10:57 11/07/23 15:25 11/08/23 15:27 11/09/23 11:53 Received 11/15/23 14:54 11/15/23 14:54 11/15/23 14:54 11/15/23 14:54 11/15/23 14:54 11/15/23 14:54 Eastern Research Group The results in this report apply only to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. Page 2 of 23 CERTIFICATE OF ANALYSIS OECA 2890 Woodbridge Avenue Edison, NJ 08837 ATTN: Shaun Burke PHONE: (202) 564-1039 FAX: (732) 321-6616 FILE #: 0453.14.003.120 REPORTED: 01/16/24 16:04 SUBMITTED: 11/15/23 AQS SITE CODE: SITE CODE: Valero Norco Inspection Description: Old API - out of service - near cokeLrab ID: 3111622-01 Pressure @ Receipt: 15.0 "Hg Canister #: 43382 Comments: (FID:5000ppm) Sampled: 11/08/23 04:25 Received: 11/15/23 14:54 Analyzed: 12/13/23 17:36 Analyte Dichlorodifluoromethane Chloromethane Dichlorotetrafluoroethane Vinyl chloride 1,3-Butadiene Ethylene oxide Bromomethane Chloroethane Acetonitrile Acrolein Trichlorofluoromethane Acrylonitrile 1,1-Dichloroethene Dichloromethane Carbon Disulfide Trichlorotrifluoroethane trans-1,2-Dichloroethylene 1,1-Dichloroethane Methyl tert-Butyl Ether Chloroprene cis-1,2-Dichloroethylene Bromochloromethane Chloroform Ethyl tert-Butyl Ether 1,2-Dichloroethane 1,1,1-Trichloroethane Benzene Carbon Tetrachloride tert-Amyl Methyl Ether 1,2-Dichloropropane Ethyl Acrylate Bromodichloromethane Trichloroethylene Methyl Methacrylate cis-1,3-Dichloropropene Methyl Isobutyl Ketone trans-1,3-Dichloropropene 1,1,2-Trichloroethane Toluene Dibromochloromethane 1,2-Dibromoethane Air Toxics by EPA Compendium Method TO-15 Results MDL ppbv ug/m Flag ppbv ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 169 541.00 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 826 3,120.00 ND ND ND ND D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04 D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04 D, O-04, U D, O-04, U 7.13 11.5 6.21 6.06 26.0 41.7 25.3 16.1 39.0 97.5 11.2 13.7 18.7 27.6 19.8 24.8 4.96 16.8 11.9 14.5 15.5 10.7 15.8 10.5 13.7 11.2 11.9 8.85 14.9 25.4 9.21 10.5 8.03 39.0 4.20 68.2 9.70 4.72 17.9 22.7 7.79 Eastern Research Group The results in this report apply only to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. Page 3 of 23 CERTIFICATE OF ANALYSIS OECA 2890 Woodbridge Avenue Edison, NJ 08837 ATTN: Shaun Burke PHONE: (202) 564-1039 FAX: (732) 321-6616 FILE #: 0453.14.003.120 REPORTED: 01/16/24 16:04 SUBMITTED: 11/15/23 AQS SITE CODE: SITE CODE: Valero Norco Inspection Description: Old API - out of service - near cokeLrab ID: 3111622-01 Pressure @ Receipt: 15.0 "Hg Canister #: 43382 Comments: (FID:5000ppm) Sampled: 11/08/23 04:25 Received: 11/15/23 14:54 Analyzed: 12/13/23 17:36 Analyte n-Octane Tetrachloroethylene Chlorobenzene Ethylbenzene m,p-Xylene Bromoform Styrene 1,1,2,2-Tetrachloroethane o-Xylene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene m-Dichlorobenzene p-Dichlorobenzene o-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachloro-1,3-butadiene Air Toxics by EPA Compendium Method TO-15 Results MDL ppbv ug/m Flag ppbv ND ND ND ND ND ND 117 509.00 931 4,050.00 ND ND ND ND ND ND 382 1,660.00 ND ND ND ND ND ND ND ND ND ND ND ND ND ND D, O-04, U D, O-04, U D, O-04, U D, O-04 D, O-04 D, O-04, U D, O-04, U D, O-04, U D, O-04 D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U 30.5 10.2 9.68 15.3 49.3 12.7 32.2 22.4 27.7 37.3 37.8 43.6 43.2 43.0 93.5 42.8 Eastern Research Group The results in this report apply only to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. Page 4 of 23 CERTIFICATE OF ANALYSIS OECA 2890 Woodbridge Avenue Edison, NJ 08837 ATTN: Shaun Burke PHONE: (202) 564-1039 FAX: (732) 321-6616 FILE #: 0453.14.003.120 REPORTED: 01/16/24 16:04 SUBMITTED: 11/15/23 AQS SITE CODE: SITE CODE: Valero Norco Inspection Description: Aeration Basin Pressure @ Receipt: 17.0 "Hg Comments: (FID:140ppm) - possible H2S Lab ID: 3111622-02 Canister #: 42190 Sampled: 11/07/23 16:28 Received: 11/15/23 14:54 Analyzed: 12/13/23 18:37 Analyte Dichlorodifluoromethane Chloromethane Dichlorotetrafluoroethane Vinyl chloride 1,3-Butadiene Ethylene oxide Bromomethane Chloroethane Acetonitrile Acrolein Trichlorofluoromethane Acrylonitrile 1,1-Dichloroethene Dichloromethane Carbon Disulfide Trichlorotrifluoroethane trans-1,2-Dichloroethylene 1,1-Dichloroethane Methyl tert-Butyl Ether Chloroprene cis-1,2-Dichloroethylene Bromochloromethane Chloroform Ethyl tert-Butyl Ether 1,2-Dichloroethane 1,1,1-Trichloroethane Benzene Carbon Tetrachloride tert-Amyl Methyl Ether 1,2-Dichloropropane Ethyl Acrylate Bromodichloromethane Trichloroethylene Methyl Methacrylate cis-1,3-Dichloropropene Methyl Isobutyl Ketone trans-1,3-Dichloropropene 1,1,2-Trichloroethane Toluene Dibromochloromethane 1,2-Dibromoethane Air Toxics by EPA Compendium Method TO-15 Results MDL ppbv ug/m Flag ppbv ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 16.0 ND ND ND ND ND ND ND ND ND ND ND 96.7 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 51.20 ND ND ND ND ND ND ND ND ND ND ND 365.00 ND ND D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04 D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04 D, O-04, U D, O-04, U 0.0670 0.108 0.0584 0.0569 0.244 0.392 0.237 0.151 0.366 0.916 0.105 0.129 0.175 0.260 0.186 0.233 0.0466 0.158 0.112 0.136 0.145 0.100 0.149 0.0991 0.129 0.106 0.112 0.0832 0.140 0.239 0.0865 0.0986 0.0754 0.366 0.0395 0.641 0.0912 0.0444 0.169 0.213 0.0732 Eastern Research Group The results in this report apply only to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. Page 5 of 23 CERTIFICATE OF ANALYSIS OECA 2890 Woodbridge Avenue Edison, NJ 08837 ATTN: Shaun Burke PHONE: (202) 564-1039 FAX: (732) 321-6616 FILE #: 0453.14.003.120 REPORTED: 01/16/24 16:04 SUBMITTED: 11/15/23 AQS SITE CODE: SITE CODE: Valero Norco Inspection Description: Aeration Basin Pressure @ Receipt: 17.0 "Hg Comments: (FID:140ppm) - possible H2S Lab ID: 3111622-02 Canister #: 42190 Sampled: 11/07/23 16:28 Received: 11/15/23 14:54 Analyzed: 12/13/23 18:37 Analyte n-Octane Tetrachloroethylene Chlorobenzene Ethylbenzene m,p-Xylene Bromoform Styrene 1,1,2,2-Tetrachloroethane o-Xylene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene m-Dichlorobenzene p-Dichlorobenzene o-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachloro-1,3-butadiene Air Toxics by EPA Compendium Method TO-15 Results MDL ppbv ug/m Flag ppbv ND ND ND 20.4 67.3 ND ND ND 34.4 ND ND ND ND ND ND ND ND ND ND 88.80 293.00 ND ND ND 150.00 ND ND ND ND ND ND ND D, O-04, U D, O-04, U D, O-04, U D, O-04 D, O-04 D, O-04, U D, O-04, U D, O-04, U D, O-04 D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U 0.286 0.0954 0.0910 0.144 0.464 0.120 0.303 0.211 0.261 0.351 0.355 0.409 0.406 0.404 0.879 0.403 Eastern Research Group The results in this report apply only to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. Page 6 of 23 CERTIFICATE OF ANALYSIS OECA 2890 Woodbridge Avenue Edison, NJ 08837 ATTN: Shaun Burke PHONE: (202) 564-1039 FAX: (732) 321-6616 FILE #: 0453.14.003.120 REPORTED: 01/16/24 16:04 SUBMITTED: 11/15/23 AQS SITE CODE: SITE CODE: Valero Norco Inspection Description: 943-Q118 Drain Pressure @ Receipt: 14.0 "Hg Comments: (FID:8000PPM Lab ID: 3111622-03 Canister #: 35134 Sampled: 11/07/23 10:57 Received: 11/15/23 14:54 Analyzed: 12/13/23 19:37 Analyte Dichlorodifluoromethane Chloromethane Dichlorotetrafluoroethane Vinyl chloride 1,3-Butadiene Ethylene oxide Bromomethane Chloroethane Acetonitrile Acrolein Trichlorofluoromethane Acrylonitrile 1,1-Dichloroethene Dichloromethane Carbon Disulfide Trichlorotrifluoroethane trans-1,2-Dichloroethylene 1,1-Dichloroethane Methyl tert-Butyl Ether Chloroprene cis-1,2-Dichloroethylene Bromochloromethane Chloroform Ethyl tert-Butyl Ether 1,2-Dichloroethane 1,1,1-Trichloroethane Benzene Carbon Tetrachloride tert-Amyl Methyl Ether 1,2-Dichloropropane Ethyl Acrylate Bromodichloromethane Trichloroethylene Methyl Methacrylate cis-1,3-Dichloropropene Methyl Isobutyl Ketone trans-1,3-Dichloropropene 1,1,2-Trichloroethane Toluene Dibromochloromethane 1,2-Dibromoethane Air Toxics by EPA Compendium Method TO-15 Results MDL ppbv ug/m Flag ppbv ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 11800 ND ND ND ND ND ND ND ND ND ND ND 28100 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 37,800.00 ND ND ND ND ND ND ND ND ND ND ND 106,000.00 ND ND D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04 D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04 D, O-04, U D, O-04, U 34.1 54.7 29.7 28.9 124 199 121 76.7 186 466 53.6 65.4 89.1 132 94.7 118 23.7 80.1 57.0 69.4 73.9 51.0 75.6 50.4 65.4 53.7 57.0 42.3 71.0 121 44.0 50.1 38.3 186 20.1 326 46.4 22.6 85.7 108 37.2 Eastern Research Group The results in this report apply only to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. Page 7 of 23 CERTIFICATE OF ANALYSIS OECA 2890 Woodbridge Avenue Edison, NJ 08837 ATTN: Shaun Burke PHONE: (202) 564-1039 FAX: (732) 321-6616 FILE #: 0453.14.003.120 REPORTED: 01/16/24 16:04 SUBMITTED: 11/15/23 AQS SITE CODE: SITE CODE: Valero Norco Inspection Description: 943-Q118 Drain Pressure @ Receipt: 14.0 "Hg Comments: (FID:8000PPM Lab ID: 3111622-03 Canister #: 35134 Sampled: 11/07/23 10:57 Received: 11/15/23 14:54 Analyzed: 12/13/23 19:37 Analyte n-Octane Tetrachloroethylene Chlorobenzene Ethylbenzene m,p-Xylene Bromoform Styrene 1,1,2,2-Tetrachloroethane o-Xylene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene m-Dichlorobenzene p-Dichlorobenzene o-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachloro-1,3-butadiene Air Toxics by EPA Compendium Method TO-15 Results MDL ppbv ug/m Flag ppbv ND ND ND 5450 12400 ND ND ND 5260 ND ND ND ND ND ND ND ND ND ND 23,700.00 54,000.00 ND ND ND 22,900.00 ND ND ND ND ND ND ND D, O-04, U D, O-04, U D, O-04, U D, O-04 D, O-04 D, O-04, U D, O-04, U D, O-04, U D, O-04 D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U 145 48.5 46.2 73.3 236 60.9 154 107 133 178 180 208 206 205 447 205 Eastern Research Group The results in this report apply only to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. Page 8 of 23 CERTIFICATE OF ANALYSIS OECA 2890 Woodbridge Avenue Edison, NJ 08837 ATTN: Shaun Burke PHONE: (202) 564-1039 FAX: (732) 321-6616 FILE #: 0453.14.003.120 REPORTED: 01/16/24 16:04 SUBMITTED: 11/15/23 AQS SITE CODE: SITE CODE: Valero Norco Inspection Description: Pump P37-503 bolts Pressure @ Receipt: 11.0 "Hg Comments: (FID:90,000 PPM) - High VOC Lab ID: 3111622-04 Canister #: 35132 Sampled: 11/07/23 15:25 Received: 11/15/23 14:54 Analyzed: 12/13/23 15:31 Analyte Dichlorodifluoromethane Chloromethane Dichlorotetrafluoroethane Vinyl chloride 1,3-Butadiene Ethylene oxide Bromomethane Chloroethane Acetonitrile Acrolein Trichlorofluoromethane Acrylonitrile 1,1-Dichloroethene Dichloromethane Carbon Disulfide Trichlorotrifluoroethane trans-1,2-Dichloroethylene 1,1-Dichloroethane Methyl tert-Butyl Ether Chloroprene cis-1,2-Dichloroethylene Bromochloromethane Chloroform Ethyl tert-Butyl Ether 1,2-Dichloroethane 1,1,1-Trichloroethane Benzene Carbon Tetrachloride tert-Amyl Methyl Ether 1,2-Dichloropropane Ethyl Acrylate Bromodichloromethane Trichloroethylene Methyl Methacrylate cis-1,3-Dichloropropene Methyl Isobutyl Ketone trans-1,3-Dichloropropene 1,1,2-Trichloroethane Toluene Dibromochloromethane 1,2-Dibromoethane Air Toxics by EPA Compendium Method TO-15 Results MDL ppbv ug/m Flag ppbv ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 2130 ND ND ND ND ND ND ND ND ND ND ND 5610 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 6,820.00 ND ND ND ND ND ND ND ND ND ND ND 21,200.00 ND ND D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U O-04, D, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U O-04, D, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U CF, D, LK, O-04 D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04 D, O-04, U D, O-04, U 4.40 7.06 3.83 3.73 16.0 25.7 15.6 9.90 24.0 60.1 6.92 8.45 11.5 17.0 12.2 15.3 3.06 10.3 7.35 8.95 9.54 6.59 9.76 6.50 8.45 6.93 7.35 5.46 9.17 15.7 5.68 6.47 4.95 24.0 2.59 42.1 5.98 2.91 11.1 14.0 4.80 Eastern Research Group The results in this report apply only to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. Page 9 of 23 CERTIFICATE OF ANALYSIS OECA 2890 Woodbridge Avenue Edison, NJ 08837 ATTN: Shaun Burke PHONE: (202) 564-1039 FAX: (732) 321-6616 FILE #: 0453.14.003.120 REPORTED: 01/16/24 16:04 SUBMITTED: 11/15/23 AQS SITE CODE: SITE CODE: Valero Norco Inspection Description: Pump P37-503 bolts Pressure @ Receipt: 11.0 "Hg Comments: (FID:90,000 PPM) - High VOC Lab ID: 3111622-04 Canister #: 35132 Sampled: 11/07/23 15:25 Received: 11/15/23 14:54 Analyzed: 12/13/23 15:31 Analyte n-Octane Tetrachloroethylene Chlorobenzene Ethylbenzene m,p-Xylene Bromoform Styrene 1,1,2,2-Tetrachloroethane o-Xylene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene m-Dichlorobenzene p-Dichlorobenzene o-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachloro-1,3-butadiene Air Toxics by EPA Compendium Method TO-15 Results MDL ppbv ug/m Flag ppbv ND ND ND 901 3620 ND ND ND 1130 ND ND ND ND ND ND ND ND ND ND 3,920.00 15,800.00 ND ND ND 4,920.00 ND ND ND ND ND ND ND O-04, D, U D, O-04, U D, O-04, U D, O-04 D, O-04 D, O-04, U D, O-04, U D, O-04, U D, O-04 D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U 18.8 6.26 5.97 9.46 30.4 7.86 19.9 13.8 17.1 23.0 23.3 26.9 26.6 26.5 57.7 26.4 Eastern Research Group The results in this report apply only to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. Page 10 of 23 CERTIFICATE OF ANALYSIS OECA 2890 Woodbridge Avenue Edison, NJ 08837 ATTN: Shaun Burke PHONE: (202) 564-1039 FAX: (732) 321-6616 FILE #: 0453.14.003.120 REPORTED: 01/16/24 16:04 SUBMITTED: 11/15/23 AQS SITE CODE: SITE CODE: Valero Norco Inspection Description: Coker injection centrifuge Pressure @ Receipt: 7.5 "Hg Comments: (FID:10-20,000 PPM) Lab ID: 3111622-05 Canister #: 41655 Sampled: 11/08/23 15:27 Received: 11/15/23 14:54 Analyzed: 12/15/23 13:05 Analyte Dichlorodifluoromethane Chloromethane Dichlorotetrafluoroethane Vinyl chloride 1,3-Butadiene Ethylene oxide Bromomethane Chloroethane Acetonitrile Acrolein Trichlorofluoromethane Acrylonitrile 1,1-Dichloroethene Dichloromethane Carbon Disulfide Trichlorotrifluoroethane trans-1,2-Dichloroethylene 1,1-Dichloroethane Methyl tert-Butyl Ether Chloroprene cis-1,2-Dichloroethylene Bromochloromethane Chloroform Ethyl tert-Butyl Ether 1,2-Dichloroethane 1,1,1-Trichloroethane Benzene Carbon Tetrachloride tert-Amyl Methyl Ether 1,2-Dichloropropane Ethyl Acrylate Bromodichloromethane Trichloroethylene Methyl Methacrylate cis-1,3-Dichloropropene Methyl Isobutyl Ketone trans-1,3-Dichloropropene 1,1,2-Trichloroethane Toluene Dibromochloromethane 1,2-Dibromoethane Air Toxics by EPA Compendium Method TO-15 Results MDL ppbv ug/m Flag ppbv ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 5800 ND ND ND ND ND ND ND ND ND ND ND 31900 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 18,600.00 ND ND ND ND ND ND ND ND ND ND ND 120,000.00 ND ND D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U O-04, D, U D, O-04, U D, O-04, U D, O-04 D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04 D, O-04, U D, O-04, U 18.8 30.2 16.4 15.9 68.4 110 66.5 42.3 103 257 29.5 36.1 49.1 72.7 52.2 65.3 13.1 44.1 31.4 38.2 40.7 28.1 41.7 27.8 36.1 29.6 31.4 23.3 39.2 66.8 24.2 27.6 21.1 103 11.1 180 25.6 12.4 47.3 59.7 20.5 Eastern Research Group The results in this report apply only to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. Page 11 of 23 CERTIFICATE OF ANALYSIS OECA 2890 Woodbridge Avenue Edison, NJ 08837 ATTN: Shaun Burke PHONE: (202) 564-1039 FAX: (732) 321-6616 FILE #: 0453.14.003.120 REPORTED: 01/16/24 16:04 SUBMITTED: 11/15/23 AQS SITE CODE: SITE CODE: Valero Norco Inspection Description: Coker injection centrifuge Pressure @ Receipt: 7.5 "Hg Comments: (FID:10-20,000 PPM) Lab ID: 3111622-05 Canister #: 41655 Sampled: 11/08/23 15:27 Received: 11/15/23 14:54 Analyzed: 12/15/23 13:05 Analyte n-Octane Tetrachloroethylene Chlorobenzene Ethylbenzene m,p-Xylene Bromoform Styrene 1,1,2,2-Tetrachloroethane o-Xylene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene m-Dichlorobenzene p-Dichlorobenzene o-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachloro-1,3-butadiene Air Toxics by EPA Compendium Method TO-15 Results MDL ppbv ug/m Flag ppbv ND ND ND 8680 38000 ND ND ND 14800 ND ND ND ND ND ND ND ND ND ND 37,800.00 165,000.00 ND ND ND 64,400.00 ND ND ND ND ND ND ND D, O-04, U D, O-04, U D, O-04, U D, O-04 D, O-04 D, O-04, U D, O-04, U D, O-04, U D, O-04 O-04, D, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U 80.2 26.7 25.5 40.4 130 33.6 84.9 59.1 73.1 98.2 99.5 115 114 113 246 113 Eastern Research Group The results in this report apply only to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. Page 12 of 23 CERTIFICATE OF ANALYSIS OECA 2890 Woodbridge Avenue Edison, NJ 08837 ATTN: Shaun Burke PHONE: (202) 564-1039 FAX: (732) 321-6616 FILE #: 0453.14.003.120 REPORTED: 01/16/24 16:04 SUBMITTED: 11/15/23 AQS SITE CODE: SITE CODE: Valero Norco Inspection Description: Manhole # 2 in crude unit Pressure @ Receipt: 4.5 "Hg Comments: (FID:2,000 PPM) Lab ID: 3111622-06 Canister #: 41644 Sampled: 11/09/23 11:53 Received: 11/15/23 14:54 Analyzed: 12/13/23 20:39 Analyte Dichlorodifluoromethane Chloromethane Dichlorotetrafluoroethane Vinyl chloride 1,3-Butadiene Ethylene oxide Bromomethane Chloroethane Acetonitrile Acrolein Trichlorofluoromethane Acrylonitrile 1,1-Dichloroethene Dichloromethane Carbon Disulfide Trichlorotrifluoroethane trans-1,2-Dichloroethylene 1,1-Dichloroethane Methyl tert-Butyl Ether Chloroprene cis-1,2-Dichloroethylene Bromochloromethane Chloroform Ethyl tert-Butyl Ether 1,2-Dichloroethane 1,1,1-Trichloroethane Benzene Carbon Tetrachloride tert-Amyl Methyl Ether 1,2-Dichloropropane Ethyl Acrylate Bromodichloromethane Trichloroethylene Methyl Methacrylate cis-1,3-Dichloropropene Methyl Isobutyl Ketone trans-1,3-Dichloropropene 1,1,2-Trichloroethane Toluene Dibromochloromethane 1,2-Dibromoethane Air Toxics by EPA Compendium Method TO-15 Results MDL ppbv ug/m Flag ppbv ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 850 ND ND ND ND ND ND ND ND ND ND ND 9130 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 2,720.00 ND ND ND ND ND ND ND ND ND ND ND 34,500.00 ND ND D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U O-04, D, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04 D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04 D, O-04, U O-04, D, U 8.91 14.3 7.76 7.57 32.5 52.1 31.6 20.1 48.7 122 14.0 17.1 23.3 34.5 24.8 31.0 6.20 20.9 14.9 18.1 19.3 13.3 19.8 13.2 17.1 14.0 14.9 11.1 18.6 31.7 11.5 13.1 10.0 48.7 5.25 85.3 12.1 5.90 22.4 28.3 9.74 Eastern Research Group The results in this report apply only to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. Page 13 of 23 CERTIFICATE OF ANALYSIS OECA 2890 Woodbridge Avenue Edison, NJ 08837 ATTN: Shaun Burke PHONE: (202) 564-1039 FAX: (732) 321-6616 FILE #: 0453.14.003.120 REPORTED: 01/16/24 16:04 SUBMITTED: 11/15/23 AQS SITE CODE: SITE CODE: Valero Norco Inspection Description: Manhole # 2 in crude unit Pressure @ Receipt: 4.5 "Hg Comments: (FID:2,000 PPM) Lab ID: 3111622-06 Canister #: 41644 Sampled: 11/09/23 11:53 Received: 11/15/23 14:54 Analyzed: 12/13/23 20:39 Analyte n-Octane Tetrachloroethylene Chlorobenzene Ethylbenzene m,p-Xylene Bromoform Styrene 1,1,2,2-Tetrachloroethane o-Xylene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene m-Dichlorobenzene p-Dichlorobenzene o-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachloro-1,3-butadiene Air Toxics by EPA Compendium Method TO-15 Results MDL ppbv ug/m Flag ppbv ND ND ND 1640 7600 ND ND ND 2890 ND ND ND ND ND ND ND ND ND ND 7,140.00 33,100.00 ND ND ND 12,600.00 ND ND ND ND ND ND ND D, O-04, U D, O-04, U D, O-04, U D, O-04 D, O-04 D, O-04, U D, O-04, U D, O-04, U D, O-04 D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U D, O-04, U 38.1 12.7 12.1 19.2 61.7 15.9 40.3 28.0 34.7 46.6 47.2 54.4 54.0 53.7 117 53.5 Eastern Research Group The results in this report apply only to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. Page 14 of 23