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HomeMy WebLinkAboutMINUTES - 06171997 - C109 / ;� • • � X09 TO: BOARD OF SUPERVISORS . Contra FROM: HARVEY E. BRAGDON Costa DIRECTOR OF COMMUNITY DEVELOPMENT County �TH DATE : June 10, 1997 SUBJECT: Ratification of the Zoning Administrator's Decision Regarding Shell Oil Company's Compliance with Conditions of Approval #231 #35A and #35B (LUP 2009-92) SPECIFIC REQUEST (S) OR RECOMMENDATIONS) & BACKGROUND AND JUSTIFICATION RECOMMENDATIONS 1 . Ratify the Zoning Administrator' s decision that Shell Oil Company has complied with Condition of Approval #23 for the third stream into the pentane storage spheres. 2 . Ratify the Zoning Administrator' s decision that Shell Oil Company has complied with Condition 35A and 35B for the Off- Plot Equipment (including -the Process Water System and the Gasoline Logistics Area) . FISCAL IMPACT None. BACKGROUND/REASONS FOR RECOMMENDATIONS When the Board of Supervisors approved the Land Use Permit for Shell Oil Company' s Clean Fuels Project (County LUP #2009-92) , the Board specified that the Zoning Administrator' s decision regarding several conditions of approval be placed. on the Board' s consent calendar for ratification. As directed by the Board at the October 4, 1994 meeting, the County Zoning Administrator decisions discussed herein have been placed on the Zoning Administrator ' s agenda for June 9, 1997 . Any comments received at the meeting will be forwarded to the Board. CONTINUED ON ATTACHMENT: XX YES SIGNATU �j. RECOMMENDATION OF COUNTY ADMINISTRATOR RECOMMENDATION OF BOARD COMMITTEE APPROVE OTHER SIGNATURE (S) : ACTION OF BOARD ON I99rJ APPROVED AS RECOMMENDED OTHER VOTE OF SUPERVISORS I HEREBY CERTIFY THAT THIS IS A UNANIMOUS (ABSENT TRUE AND CORRECT COPY OF AN AYES: NOES: ACTION TAKEN AND ENTERED ON THE ABSENT: ABSTAIN: MINUTES OF THE BOARD OF SUPERVISORS ON THE DATE SHOWN. Contact: Debra Sanderson (510/335-1208) ATTESTED ,'7 cc: Community Development Department (CDD) 4PLtBATCfiELOR, CLERK OF Health Services Department: Haz Mat THE BOARD OF SUPERVISORS Shell Oil (via CDD) AND COUNTY ADMINISTRATOR BY , DEPUTY DRS\aw J:\aw\6-10sh1.bo F Ratification of the ZA's Decision Regarding Shell Oil Co: Compliance with COA #23, #35A and #35B (LUP 2009-92) June 10, 1997 Page Two Condition of Approval #23 -- Implementation of measures in its hazards and operability studies : Condition #23 requires Shell to demonstrate to the satisfaction of the County Health Services Department that the measures detailed in the approved hazard and operability studies are implemented prior to the start up of any unit . On May 5, 1995, the Board of Supervisors ratified the Zoning Administrator' s finding that Shell had completed the required hazards and operability studies for the pentane spheres . These studies identified certain measures that Shell was required to implement prior to start up of this unit . As specified by Condition #23, County Health Services staff has field checked this unit to verify that each of the measures identified in the approved studies has been implemented. On March 12, 1996, the Board of Supervisors ratified the Zoning Administrator' s finding that Shell had implemented measures detailed in its approved hazards and operability studies and its consequence analysis for all but one stream into the pentane spheres . On May 22, 1997, County Health Services Department confirmed in writing that Shell Oil Company had implemented all the measures detailed in Shell' s approved hazards operability study and its accident consequence analysis for all streams into its pentane spheres . Condition of Approval #35 - Compliance with Noise Standards : Permit Condition #35A requires the submittal of detailed noise level calculations to demonstrate that the unit to be constructed will comply with the noise performance standard (77 dBA when measured five . feet above the ground and 100 feet from the equipment) . Permit condition #35B requires that once a unit is operational, additional noise monitoring be completed to verify that noise from the operating unit meets the standard. On March 31, 1997, Shell submitted analysis completed by a qualified acoustical expert demonstrating that the "Off-Plot Equipment" meets the noise performance standard for this project. This equipment is outside of the boundary of any particular unit, and generally includes isolated pumps, motors and valves . The analysis covers 40 pieces of equipment and includes the Process Water System as well as the Alkylate pump in the Gasoline Logistics Area. Compliance was determined either through (1) noise measurements, (2) calculations based on noise data sheets (where measurements could not be taken) , or (3) calculations based on data sheets for similar equipment. The analysis demonstrates that the noise generated by this equipment meets the noise performance standard and is generally well below the noise performance standard for this project . lt - EXHIBIT A Co N 0 c71 DAI 3r F.O.Box 711 Martinez,Califomia 94553-0071 Telephone: (510)313-3000 March 31, 1997 Ms. Debbie Sanderson Contra Costa County Community Development Depart. Administration Building, North Wing, 2nd Floor 651 Pine Street Martinez, CA 94553-0095 Dear Ms. Sanderson, SUBJECT: SHELL OIL COMPANY CLEAN FUELS PROJECT OPERATIONAL NOISE CALCULATIONS/MONITORING REPORTS FOR OFF PLOT EQUIPMENT (COUNTY FILE NUMBER 2009-92) In compliance with the Clean Fuels Project Land Use Permit Conditions #35 A&B and Mitigation Measure 10-4, we have enclosed a number of reports prepared by Frank Brittain of Bechtel. The reports include measurements for equipment in operation and calculations where equipment was not in operation. If you have any questions regarding this information, please contact me at (510) 313- 3695. Very truly yours, E. T. Swieszcz, Staff neer Environmental Affairs 0 bc: without enclosure Mark Brown CFP Trailer A Dave Williams - Bechtel ETS File CF.3.1.9 - 35B ECD Clean Fuels Binder Vol 3 `Shell Martinez Refining Company Interoffice Memorandum MARCH 31, 1997 FROM: S. E. TIRRELL TO: E. T. SWIESZCZ SUBJECT: OFF-PLOT.CLEAN FUELS EQUIPMENT NOISE CALCULATIONS/MEASUREMENTS Attached is a report by Frank Brittain of Bechtel reporting measurements where equipment is available, or calculations if not, in conformance with Clean Fuels Land Use Permit Conditions 35A and 35B. The report generally covers equipment which is not part of a distinct process unit. In some cases equipment isn't needed and can't be readily operated. (For example,the Clean Fuels site runoff pumps don't operate unless there is rain runoff.) In other cases,the equipment isn't able to be run or needed at present because of operating reasons. When equipment couldn't be run, calculations were made. %' WE. ire i Staff Engineer t OPERATING NOISE VERIFICATION REPORT FOR OFF—PLOT EQUIPMENT SHELL MARTINEZ MANUFACTURING COMPLEX CLEAN FUELS PROJECT—BECHTEL JOB NO.22500 Report Prepared By: Date: Noise Measurement Made By: On: .31 tr*v'� &�L— 31 11-fe'A /1477 /117 Frank H.Brittain,Ph.D.,Member INCE Frank H.Brittain,Ph.D.,Member INCE Engineering Specialist, Engineering Specialist, Bechtel Corp. Bechtel Corp. T f' ti SHELL MARTINEZ MANUFACTURING COMPLEX CLEAN FUELS PROJECT n BECHTEL JOB NO.22500 OPERATING NOISE VERIFICATION REPORT FOR OFF—PLOT EQUIPMENT 1. INTRODUCTION The purpose of these noise verifications is to demonstrate that the Off-Plot equipment, either singularly or in clus- ters, meet Condition No. 35B from the Contra Costa County's Land Use Permit No. 2009-92. Off-Plot pumps and other noise producing equipment were identified. Noise from each piece or group of equipment is shown to meet the County's noise limit of 77 dBA at 100 feet from equipment and 5 feet above grade using one of three methods: previous verification reports, measurements of individual equipment, or calculation. Most of the Off-Plot equip- ment is either rather small, had previous verification reports prepared, or has not been put into service yet. Where feasible, verification measurements of equipment, for which previous verification reports had not been prepared, were made between 20 and 26 March 1997. The Shell Martinez Clean Fuels Project Protocol For Verifying Noise Emissions From Individual Process Units, dated 27 April 1994(hereafter called the Protocol)that was approved by the Contra Costa Board of Supervisors on 14 June 1994, applies only to process units. A modified measurement procedure was used, as outlined below. All Off-Plot equipment was shown to comply with the County's noise per- formance standard of 77 dBA at 100 feet from equipment and 5 feet above grade. 2. BACKGROUND Verification that each piece or cluster of equipment met its noise limit was difficult for the following reasons: o Some equipment has not been put into service yet o Much equipment is so small that noise data sheets were not required(see Appendix A) o Some of the equipment is currently down for repair o Some of the equipment is run infrequently,including during limited times of the year o One piece of equipment has never been run,and there are no plans to run it o One piece of equipment was never installed. As described below, methods were developed to verify that the noise from each piece or cluster of Off-Plot equip- ment meets the County's noise limit. 3. IDENTIFICATION OF OFF-PLOT EQUIPMENT All Off-Plot pumps, compressors, other rotating equipment, or potential noise sources were identified by Mr. Steve Tirrell of Shell. The Clean Fuels construction was organized into Areas, as shown in Table 1. The Off-Plot equip ment are shown on Table 2. The only equipment omitted from Table 2 are submersed sump pumps below 15 HP, which are expected to have very low noise levels, and equipment that is located within other Units with a verifica- tion report. That is,if a piece of equipment is located inside a Unit that has a separate noise verification report,then is not included in Table 2. In Table 2, P and J in an equipment number refer to a pump and compressor respec- tively. The locations of Off-Plot equipment are given in Figure 1. The method used to verify that each piece of equipment meets its noise limits is also shown in Table 2. Under the Verified By column, DONE means that a verification report has been prepared,Measure means that verification is based on recent noise measurements of individual equipment, and Calcs means that verification is made using calculations from vendor noise data(were available)or noise data from similar equipment. 4. INSTRUMENTATION The following instrumentation was used in making the noise measurements: o Hewlett Packard 3569A,Sound Level Analyzer with Octave Bands 1 of 7 i o Bruel and Kjaer 4134,Microphone o GenRad P42, Preamplifier o Bruel and Kjaer 4230,Acoustic Calibrator o Windscreen. 5. MEASUREMENT PROCEDURES Since the Off-Plot equipment is isolated or located in small clusters, the Protocol is not applicable. A simplified measurement procedure was developed,that is expected to give the same results as would be obtained by the Proto- col. This procedures is as follows: o Calibrate instruments both before and after each set of measurements o Measure at 3 feet from equipment to reduce effects of background noise,where feasible o Measure on one side,since noise on each side of individual equipment is nearly identical o Measure an Leq rather than an L50 in the Protocol(conservative,because L50:s Leq) o Extrapolate levels from 3 feet to 100 feet(as described in Verification Using Measurements). Since most Off-Plot equipment is operated at either full load or is off,the measurements appear to have been made while the equipment was operating normally. However, since much of this equipment is operated only intermit- tently, actual noise levels will be negligible much of the time. For the Off-Plot equipment, this procedure is expected to give equivalent results to that obtained using the Protocol. Based in the Protocol, corrections for back- ground noise presumably could have been made,but no such corrections were needed or used. 6. PREVIOUS VERIFICATIONS As indicated in Table 1,verification measurements had previously been made for the C5 pentane Sphere Area,Flare Gas Compressor Area, and the Process Water Area. Reports for the two former Areas have been submitted to the County and approved. Records of submittal for the Process Water Area are missing, and it is possible this verifica- tion report was not submitted. This verification report does not include the following pumps,because they were not operable at the time measurements were made: o P13230/1 PAD Sump pump o P13234 Runoff Sump(first stage) o P13235/6 Runoff Sump(second and third stages). A copy of the verification report for the Process Water Area is included in Appendix B. It should be noted that when the noise reports containing noise prediction models were submitted, the Process Water and Flare Gas Recovery Areas were included in the same report. Since the construction of these two areas was completed at different times,the verification measurements were included in different reports. 7. VERIFICATION USING MEASUREMENTS . Measurements of total noise levels during operation of Off-Plot equipment were made between 20 and 26 March 1997 by Dr. Frank Brittain of Bechtel, a member of INCE(Institute of Noise Control Engineers)with 26 years of experience in noise control engineering. Dr.Brittain also prepared this report. Off-Plot equipment that were verified by measurements of individual equipment made between 20 and 26 March 1997 are summarized in Table 3. The measured levels at 3 feet and 5 feet above the base of the equipment and levels extrapolated to 100 feet are given. In some cases,the measured levels included some background noise. No correction for background was needed or used. In each case,the noise limit is 77 dBA at 100 feet from the equip- ment and 5 feet above grade. The extrapolation was by assuming that the noise level at 3 and 6 feet from the equipment are the same,and then the reduction with distance from 6 to 100 feet was computed from the following: Reduction = 20 Log(6/100) = —24.4 dB. 2 of 7 7 y r � i 8. VERIFICATION USING CALCULATIONS Those Off-Plot equipment that were verified by calculations of individual or groups of equipment are summarized in Table 4. Where noise from a cluster of equipment were predicted, the grouping is indicated in Table 4. In each case,the total predicted levels(including both pump and motor)at 100 feet and 5 feet above grade in given in Table 4. The calculations for individual equipment or groups of equipment are given in Appendix C. Where equipment is similar or very small,calculations for more than one piece of equipment was included in one calculation sheet. Most of the Off-plot equipment,for which measurements were not made,did not have noise data sheets,because(as indicated in Appendix A)most of this equipment is too small or too low speed to require noise data sheets. Where available,calculations are based on vendor noise data supplied for that piece of equipment. Where no vendor noise data were available, noise data for similar equipment with the same HP and speed from other vendors was used in the calculations. Most of the equipment whose noise levels were verified is rather small and low-noise. 9. CONCLUSIONS The Off-Plot equipment, other than submerged sump pumps below 15 HP and those located on and included in the verification reports of other Units, were verified to meet the County's noise limit of 77 dBA at 100 feet from the equipment and 5 feet above grade. Verifications are based on previous verification reports, measurements of indi- vidual equipment,or calculations. Table 1—List of Refinery Work Areas Work Area Name 5 Light Oil Plant(LOP),an existing main refinery area 8 Light Crude/Alkylate IOFL Flare Gas(part of Waste Water Handling) IOPW Process Water (part of Waste Water Handling) 11 Crude MFO/DCU Feed 12 Pentane Sphere Area(C5 Pentane Spheres) 16 Sour Water/Acid Tanks 99D Miscellaneous Off-Sites 99D Miscellaneous Off-Sites 99N Miscellaneous Off-Sites 99S Miscellaneous Off-Sites A Clean Fuels Off-Plots Pacheco Off-Plot—Maintenance Shops Near Pacheco Blvd. 3 of 7 r Table 2—List Of Off-Plot Equipment And Status Of Verification Equipment Service Area Verified By Status Of Verification P13199 Caustic Transfer 5 Measure P13268 Boiler Feedwater 5 Measure J13244 Alkylate Tank Vapor Recovery 8 Measure P13276 Alkylate Component 8 Calcs Never run,not expected to in near future P13304 Blending 8 N/A PUMP NEVER INSTALLED EA13205/7/9 Compressor 13205 Intercooler IOFL DONE Submitted 4/22/96;approved 6/25/96 EA13206/8/10 Compressor 13206 Intercooler IOFL DONE Submitted 4/22/96;approved 6/25/96 J13205/6 Flare Gas Compressor IOFL DONE Submitted 4/22/96;approved 6/25/96 P13207/8 Flare KO Drum IOFL DONE Submitted 4/22/96;approved 6/25/96 P13281/2 Compressor KO Drum IOFL DONE Submitted 4/22/96;approved 6/25/96 P13192/3 Oily Water IOPW DONE Measurement Report Done P13230/1 PAD Sump IOPW Calcs P13234 Runoff Sump IOPW Calcs P13235/6 Runoff Sump IOPW Calcs P13245/80/81 Process Water IOPW DONE Measurement Report Done P13288/9 Mud Tank Feed IOPW DONE Measurement Report Done P13290 Mud Tank Decanting IOPW DONE Measurement Report Done P13385 Sump Skim IOPW DONE Measurement Report Done SW13191/95 Sludge Grinder IOPW DONE Measurement Report Done P13274 Interim Gasoline Transfer 11 Calcs P13262 Alkylate Transfer 12 DONE Submitted 4/22/96;approved 6/25/96 P13263/4 Pentane Loading 12 DONE Submitted 4/22/96;approved 6/25/96 P13265/6 Pentane Blending 12 DONE Submitted 4/22/96;approved 6/25/96 P13301 Process sump 16 Calcs P13335 Sour Water Hydrocarbon 16 Measure By comparison with P14540 P13336/37/40 Sour Water Degasser 16 Calcs P13338/9 Sour Water 16 Measure P13292 Cracked Gasoline 99D Measure P14540 Sour Water#6 Water Tank Hydrocarbon 99D Measure P14572/3 Sour Water#6 Charge 99D Calcs P13303 Napthenic Bottoms 99M Calcs P13307 MFO 99M Calcs P13248/9 DCU Feed 99N Measure P13251 Imported Isom Feed 99N Calcs P13279 Isomate Transfer/Blending 99N Measure By comparison with P13284 P13284/5 Cooling Water 99S, Measure P13200 Sump Pump A Calcs P13209/10 Sanitary Lift Pump A Calcs P13238/9 Submersible Lift Pump A Calcs P2416/7 Raw Water Pacheco Measure 4 of 7 t i O 00 DD � N �t M a � a � 3 C> a� o 0 o O " o ami o 4 co O. in. 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A� A ® ® Oo° lod 0 ° ® 8No �. i P o eu a a 0 'O ® © Ipso ® ® EEEINNA ® ® ��� r � APPENDICES APPENDIX A—Shell's General Specifications For Environmental Protection—Noise JUL 85 ENVIRONMENTAL PROTECTION-NOISE 24 GS-7 TABLE OF CONTENTS PAGE NO. 1. 0. GENERAL . . . . . . . . . . . . . . . . . . . . 2 1. 1. Scope . . . . . . . . . . . . . . . . . 2 1. 2 . Responsibilities . . . . . . . . . . . . . 2 1. 3 . Guarantees . . . . . . . . . . . 3 1.4 . Reference Standards and Practices . . . . . . . 3 2.0. NOISE SOURCES . . . . . . . . . . . . . . . . . . 3 2 . 1. Equipment . . . . . . . . . . . . . . . . . . 3 2. 2 . Control Valves . . . . . . . . . . . . . 4 2 . 3 . Atmospheric Vents or Intakes . . . . . . . . . 4 2.4 . Piping Systems . . . . . . . . . . . . . . . . 4 3.0. ACOUSTICAL TREATMENTS . . . . . . . . _ . 5 3.1. Enclosures . . . . . . . . . . . . . 5 3.2 . Acoustical Piping Insulation . . . . . . . 5 APPENDICES 24G7A1 Procedure For Calculating Insertion Loss of Acoustical Piping Insulation TABLES 24G7T1 MAXIMUM PERMISSIBLE SOUND PRESSURE LEVELS FOR ATMOSPHERIC VENTS OR SUCTIONS 24G7T2 MAXIMUM OVERALL INSERTION LOSS VALUES FOR PIPING SYSTEMS 24G7T3 EFFECTIVE SOUND INSERTION LOSS VALUES FOR LEVEL 1 INSULATION 24G7T4 EFFECTIVE SOUND INSERTION LOSS VALUES FOR LEVEL 2 INSULATION 24G7T5 EFFECTIVE SOUND INSERTION LOSS VALUES FOR LEVEL 3 INSULATION :.s SHELL OIL CO. MFG & TECH-ENG PAGE 1 OF 6 • JUL 85 ENVIRONMENTAL PROTECTION-NOISE 24 GS-7 1. 0. GENERAL 1. 1. Scope This General Specification covers the procedures to be followed by Contractor and Shell engineers in providing either individual equipment or an entire plant in accordance with Shell 's sound pressure level requirements. Unless otherwise noted, this specification represents mandatory Shell requirements. 1. 2 . Responsibilities 1.2. 1. Contractors shall provide plants which are in compliance with OSHA Occupational Noise Exposure Regulations as well as any other applicable federal, state, or local laws. 1.2.2. Contractor shall require vendors to complete General Equipment Noise Data Sheets (24 GS-8) or Silencer Data Sheets .(24 GS-9) as applicable for equipment items furnished and to submit same in proposals. Where vendors are providing driving and driven equipment, data sheets shall be required .for the unit as a single source. 1.2. 3 . Whenever specially designed equipment or acoustical treatment is proposed by either vendors of equipment or contractors, calculations, measured data, or other bases supporting the acoustic design shall be made available to Shell. 1.2.4. Contractor shall review any special designs or acoustical treatments offered by vendors for noise reduction, make recommendations on their application, or offer alternate solutions. 1.2.5. Purchase of special design or acoustically treated-equipment shall not be made without Shell concurrence. 1.2.6. Contractor shall maintain a file which contains all equipment noise data sheets as well as relevant data on acoustical treatments proposed and/or accepted. 1.2.7 Contractor. shall make available to Shell data required to develop noise contour maps. This includes: 1. Sound power levels or equivalent sound pressure levels by octave band for each item SHELL OIL CO. MFG &TECH-ENG - PAGE 2 OF 6 JUL 85 ENVIRONMENTAL PROTECTION-NOISE 24 GS-7 of plant equipment which is expected to produce sound pressure levels in excess of 90 dBA. 2 . Three dimensional location of the equipment with respect to overall plant layout. 1. 3 . Guarantees Contractor shall require equipment vendors to provide guarantees in accordance with the General Equipment Noise Data Sheets and/or Silencer Data Sheets. 1.4. Reference Standards and Practices The following standards and practices are considered an integral part of this specification: ANSI S1.1-1960 (R-1976) Acoustical Terminology ANSI S1.2-1962 (R-1976) Physical Measurement of Sound ANSI 51.13-1971 (R-1976) Methods of Measurement of Sound Pressure Levels API RP 531 M Measurement of Noise from Fired Process Heaters API RP 631 M Measurement of Noise from Air- Cooled Heat Exchangers s 2.0. NOISE SOURCES 2. 1. Equipment 2. 1.1. Completed General Equipment Noise Data Sheets of 24 GS-8 will be obtained from vendors of the following equipment: 1. Air Cooled Heat Exchangers 2. Air or Steam Ejectors 3. Compressors and Blowers Axial, Centrifugal, Reciprocating, Rotary 4. Conveying Equipment Mechanical and Pneumatic 5. Electric Motors - NEMA Frame (.0o+ u to d) - High Efficiency-None - Standard Duty-100 horsepower and above - WP-1, WP-II, All sizes and speeds 6. Fans (Forced and Induced Draft) 7. Furnaces and Boilers SHELL OIL CO. MFG & TECH-ENG PAGE 3 OF 6 . JUL 85 ENVIRONMENTAL PROTECTION-NOISE 24 GS-7 8 . Gas or Diesel Engines 9. Hydraulic and Pneumatic Drives 10. Mixers 11. Pumps - Electric Motor Driven - Operating at < 3600 rpm - as per, motor requirements - Operating at > 3600 rpm - all - Other Drivers - over 100 horsepower 12 . Separation Equipment (Centrifuges, Cyclones, etc. ) 13. Size Reduction Equipment (Grinders, Mills, etc. ) 14. Speed Changers (Gear Units, Varidrives, etc. ) 15. Turbines (Steam­or Gas) 16. Vibratory Devices (Shakers, Conveyors, Fluidizers, etc. ) 2 .2 . Control Valves 2.2.1. Calculations of overall noise levels will be made for all control valves. 2.2.2. Results of calculations shall be reported for all valves predicted to produce over 90dBA. 2.2.3. Where predicted noise level exceeds 95 dBA, means to attenuate noise to 90dBA shall be recommended. 2.2.4. Where downstream .orifices and/or multicage low .noise valve trim are used, noise predictions will also be reported at 1/2 maximum flow rate and maximum flow rate. 2.2.5. No valve;: including dump valves (but excluding pressure relief valves) , should be permitted to exceed 115 dBA. 2.3. Atmospheric Vents or Intakes 2.3.1. Contractor shall investigate the noise level produced from each atmospheric discharge or intake and shall identify .those which will require silencers to comply with the requirements of Table 24G7T1. This investigation will exclude pressure relief valves but will include SHELL OIL CO. MFG & TECH-ENG PAGE 4 OF 6 AUL 85 ENVIRONMENTAL PROTECTION-NOISE 24 GS-7 atmospheric exhausts from pneumatic systems. 2 . 3 . 2 . Where the need for silencers is identified, contractor shall use the Silencer Data Sheet of 24 GS-9 in procurement of the silencers. 2. 4 . Piping Systems 2. 4 . 1. Contractor shall identify the extent of the piping system which will exceed 90 dBA. 2.4 . 2 . Where predicted noise from the piping system exceeds 95 dBA, the contractor shall prepare a recommendation of acoustical treatment which will provide attenuation to 90 dBA. 2 .4. 3 . Acoustical piping insulation shall be evaluated as per Section 3 .2. 3.0. ACOUSTICAL TREATMENTS 3 . 1. Enclosures 3. 1. 1. Acoustical enclosures which are provided for equipment shall include provisions to permit necessary access for operation and maintenance. 3.1.2. Where ventilation of an enclosure is necessary, the ventilating equipment must meet area classification requirements. 3. 1.3. Where close-fitting enclosures are specified, adequate heat rejection for the enclosed equipment must be insured. 3.2 . Acoustical Piping Insulation 3.2. 1. Three types of insulation shall be considered as having insertion loss capabilities. 1. Level 1 Acoustical Insulation Hot service calcium silicate insulation with aluminum jacketing. 2. Level 2 Acoustical Insulation Hot service mineral wool or fiberglass insulation with aluminum jacketing or, for cold service, cellular glass insulation with a layer of mineral wool or fiberglass and aluminum jacketing. SHELL OIL CO. MFG & TECH-ENG PAGE 5 OF 6 i JUL 85 ENVIRONMENTAL PROTECTION-NOISE 24 GS-7 3 . Level 3 Acoustical Insulation Hot service mineral or fiberglass insulation with lead laminated aluminum jacketing or, for cold service, cellular glass with a layer of mineral wool or fiberglass with lead- laminated aluminum jacketing. 4 . NOTE Cold service cellular glass insulation shall be assumed to have no insertion loss when used without a layer of mineral wool or fiberglass. 5. Details of acoustical insulation are shown in 5 EG-100. 3 .2 . 2 . The manner for determining the insertion loss which may be attributed to acoustical insulation is detailed in appendix 24G7A1. 3 . 2. 3. If the desired insertion loss may not be achieved with the specified acoustical insulation, special insulation using septum layers (multiple insulation-jacket layers) or heavier lead- aluminum layers may be specified with Shell approval. SHELL OIL CO. MFG & TECH-ENG PAGE 6 OF 6 e APPENDIX B—Operating Noise Verification Report For The Process Water Area OPERATING NOISE MEASUREMENT REPORT FOR THE PROCESS WATER TANKS SHELL MARTINEZ MANUFACTURING COMPLEX CLEAN FUELS PROJECT- BECHTEL JOB NO. 22500 Report Prepared By: Date: Noise Measurement Made By: On: �-5u Frank H. Brittain, Ph. D.,Member INCE Frank H. Brittain, Ph. D., Member INCE Engineering Specialist, Engineering Specialist, Noise&Vibration Services, Noise&Vibration Services, Bechtel Corp. Bechtel Corp. SHELL MARTINEZ MANUFACTURING COMPLEX CLEAN FUELS PROJECT-BECHTEL JOB NO. 22500 PRELIMINARY OPERATING NOISE MEASUREMENT REPORT FOR THE PROCESS WATER TANKS 1. INTRODUCTION Preliminary measurements of operating noise from the Process Water Tanks of the Clean Fuels Project at Shell Martinez Refinery were made on 29 August 1995. The purpose of the noise measurement was to demonstrate that the Process Water Tanks met Condition No. 35A from the Contra Costa County's Land Use Permit No. 2009-92. These measurements were made accord- ing to the Shell Martinez Clean Fuels Project Protocol For Verifying Noise Emissions From Individual Process Units, dated 27 April 1994 (hereafter called the Protocol) that was approved by the Contra Costa Board of Supervisors on 14 June 1994. The preliminary measurements show that the Process Water Tanks are currently in compliance with the County's noise performance standard of 77 dBA at 100 feet from equipment and 5 feet above grade. The 77 dBA limit is defined in the Protocol to be an Lso, the A-weighted sound pressure level that is exceeded 50 percent of the time during a sampling period. The Noise Control Design Basis Summary Report dated 23 May 1994 containing predicted operating noise calculations for the Flare Gas Recovery Unit that was approved by the County on 14 June 1994, included the Flare Gas Recover Unit. In this report measurements have been made for the two Process Water Tanks (i.e., the Waste Water Handling Area) only. Operating Noise Measurement Report for the Flare .Gas Recover Unit will be made separately, since it has a different construction and startup schedule. 2. MEASUREMENT LOCATIONS Six to nine measurement locations were selected for each of three sides of the Tanks. These loca- tions are shown on Figure 1, a plot plan showing layout of the Process Water Tanks. The south side of the Process Water Tanks coincides with the north boundary of the Flare Gas Compressor Unit. As permitted in the Protocol, no measurements were made on the south side of the Tanks. Measurements were made at either 100 feet from the Equipment Perimeter or as far away from the Equipment Perimeter as feasible. The Equipment Perimeter is a straight line along each side of the Tanks so that the equipment on that side falls inside the line. The distances between the Equipment Perimeter and the measurement locations are as stated below: Distance from Equipment Side of Perimeter Tanks (feet) Comments South — Since there is no distance between the Process Water Tanks and the adjacent Flare Gas Compressor Unit, no measurements were made on the south side. This is permitted by the Protocol. m:\asok\noiserep.pwt Page 1 of 6 January 29, 1996 East 65 East of the Tanks there is an elevated berm with a road on the top, beyond which the grade drops off steeply. Measurements were made 5 feet above the edge of the road nearest the Tanks. North 40 North of the Tanks there is an elevated berm with a road on the top, beyond which the grade drops off steeply. Measurements were made on the edge of the road nearest the Tanks and 5 feet above the road. West 100 Measurements were made at the prescribed distance of 100 feet from the equipment perimeter and 5 feet above the grade of the Process Water Tanks. Measurements to the west were made 5 feet above the grade of the Process Water Tanks. How- ever, to the east and north, raised roads run directly adjacent to the Tanks. These roads are roughly 30 feet above the grade of the Process Water Tanks. Measurements between the roads and the Process Water Tanks were not feasible. Measurement locations were chosen along the nearest edge of the roads to ensure the noise producing equipment, which are pumps, were visible from the measurement locations. 3. INSTRUMENTATION The following instrumentation was used in making the noise measurements: o Bruel and Kjaer 2215, Precision Sound Level Meter with Octave Bands o Bruel and Kjaer 4230, Acoustic Calibrator o Windscreen. 4. OPERATING CONDITIONS DURING MEASUREMENTS Some, but not all, of the pumps were operating. These pumps and their motors are the dominant noise source for the Process Water Tanks. The status of the pumps were as follows during the measurements: o Effluent transfer feet pumps 2 of 3 pumps operating at 250 gpm on recirculation o Surge grinder pump Off o Mud drum decanting pump Off o Water tanks skim pump Off o Sump pumps(3 pumps) Not yet operational. No normal operation for these pumps had been established. Further, these pumps operate only very occasionally to fill the tanks or transfer the water. Thus, the Plant has no throughput for establishing a percent of normal capacity. On the south, the Flare Gas Compressor Unit was operating, noise from which affected level measured southeast and southwest of the Tanks. On the east, there is an existing pipe rack, noise m:\asok\noiserep.pwt Page 2 of 6 January 29, 1996 from which affected measurements on the east side of the Tanks. Near the northeast corner of the Plant, a portable construction diesel was operating, which significantly affected only the two nearest measurement locations. On the north, there is no new or existing equipment. On the west, there are small pumps, which only marginally affect measured levels. 5. MEASUREMENTS Measurement of noise levels during operation of the Process Water Tanks were made on 29 August 1995 by Frank Brittain of Bechtel, a member of INCE (Institute of Noise Control Engi- neers) with 25 years of experience in noise control engineering. Dr. Brittain also prepared this report. Instruments used in making the noise measurements were in accordance with the Proto- col. The levels measured were read directly from a precision sound level meter as a central tendency. A central tendency is close to an LSo, and is permitted by the Protocol. During the measurements, the noise levels were nearly constant with little fluctuation with time. Care was taken to minimize the effect of noise from construction equipment (mobile and stationary), primarily by briefly delaying measurements until the equipment was turned off or left the imme- diate area. Instruments were calibrated both before and after the measurements. 6. DEVIATIONS FROM PROTOCOL Measurements were made according to the Protocol. All measurements on the east and north sides were made nearer than 100 feet and higher than 5 feet above the grade of the Process Water Tanks. Noise levels measured closer than 100 feet are expected to be higher than would be measured at 100 feet. The slightly elevated measurements to the east and north are expected to have at most a very small impact on the measured levels. These deviations from the Protocol are considered minor, and the results of the measurements are judged to be valid. However, many of the equipment were not operating, which is a significant deviation from the Protocol. (See Section 9, Conclusions.) 7. RESULTS The A-weighted sound'pressure level as a central tendency is given for each measurement location in Table 1. The results are logarithmically averaged for each of three sides of the Process Water Tanks as specified in the Protocol. While correction of data for background levels is permitted in the Protocol, the data in Table 1 was not corrected for background. During operational noise measurements, background noise on the north and west sides was judged to have a negligible impact on the measured levels. On the south side, noise from the Flare Gas Compressor Unit affected only the nearest measurement locations on the west and east (as indicated in Table 1). On the east side, the effect of the background noise from the pipe rack was significant, but sufficiently low that correction for background noise levels was not necessary. Noise from the portable diesel powered construction equipment significantly affected noise level measured nearby (as indicated in Table 1). Other construction noise was judged to have a negligible impact on the measurements. m:\asok\noiserep.pwt Page 3 of 6 January 29, 1996 8. CONCLUSION Measurements were made while the Process Water Tanks were operating with less than all equipment operating or installed. The measured noise levels on the south, east, and west sides of the Process Water Tanks meet the County's noise performance standard of 77 dBA at 100 feet or less from the Equipment Perimeter and 5 feet above grade. Measurements on the east and north made at more than 5 feet above the grade of the Process Water Tanks did not significantly affect the validity of the measurements. As permitted in the Protocol, no measurements were made on the south side. The effect of noise from the Flare Gas Compressor Unit and other nearby equipment was sufficiently small that a correction for background noise was not needed. Since it is not necessary to meet the limit on the south side, the entire Process Water Tanks currently meets its noise requirements during partial operation of the Tanks. Additional measurements will be made when normal operation is feasible. m:\asok\noiserep.pwt Page 4 of 6 January 29, 1996 Table 1. Measured Operational Noise Levels for the Process Water Tanks Measurement Measured Sound Average Sound Pressure Location * Pressure Level in dBA Level for Side in dBA East Side Affected by flare gas compressors 75 71 67 71 71 Affected by portable diesel 77 Logarithmic Average: 74 North Side Affected by portable diesel 77 70 67 64 65 63 Logarithmic Average: 71 West Side 63 65 65 65 67 69 70 70 Affected by flare gas compressors 73 Logarithmic Average: 68 South Side No Measurements Made On South Side * No measurement location numbers were identified or used. m:lasok\noiserep.pwt Page 5 of 6 January 29, 1996 1 E ; � a f _ fe fief �� Y s ;9 �p ` ° 4 u I�q Q YYtl6 ryl O- F"11 ZR1, u1o_ eig1 FPei r s-ccec---c c333ss3 i is $xrzpa Ln 'e LZ �v-• ipp�� e i!�i 9 1 � _. wou ._......_....._...... {lN....v3W Y1gM................................ ¢ Q ! • i ' _ • IXIN1pl on ......... >, i � lrllHld�NjlllU ....._.... L .... .•1�� \,\ ii j �. 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Ra O O O O "ZI: O .-, In kn N O \O O 1,0 �t O O •-- r` 00 Rn s1. 0. y O O kn v) 00 cd t O O "O 00 00 U N N M d 4UU+ �. ' 0 d O O O O ct O O V! td ° Nkr) Okf) N O O M O O O d O O �D v7 �p cd w M M O M O O a0 kn in Q Q to N N t 'Zt r` r` 4-a v� O X to cn a� n o a� .„ En W .. O O cd �, 3 � N � U ° ° O V a o 0 Z ° El en CA O c00 O 0 .� a ti +PLO C� +, Cd s. rn ° ° 'd ° w a� Ua a, o a z Z 4.4 �. CC ° 0 0 0 ch LQ z a o U Q a a 0 0 0 0 v� uo on U Z EXHIBIT B Contra Costa County Health Services Department ENVIRONMENTAL HEALTH DIVISION OCCUPATIONAL HEALTH/HAZARDOUS MATERIALS TO: DEBRA R SANDERSON FROM: LEWIS G.PASCALLI,JR DEPUTY DIRECTOR HAZARDOUS MATERIALS SUBJECT: SNRT T CTP,LUP 922009 COA 23 COMPLIANCE FOR PENTANE SPHERES DATE: 05/22/97 Executive Summary: The Contra Costa County Health Services Department (CCCHSD) Hazardous Materials California Accidental Release Prevention Program Team has reviewed the conditions for the startup of the C5 Storage Tanks. Condition#23 reads as follows: "Prior to start-up, the applicant shall demonstrate to the satisfaction of the County Health Services Department, that the measures detailed in the approved Hazard and Operability studies have been implemented." The Shell Refinery has demonstrated to the Health Services Department's satisfaction that the measures detailed in the approved Hazard and Operability studies for the stream from C4/C5 splitter to the C5 Storage Tanks has been implemented. The Health Services Department has reviewed this final stream of three steams and concurs that Shell has adequate controls in place to ensure that Cos and lighter material from going to the C5 Storage Tanks. Process Descrlptlon: The C5 Storage Tanks are located in the northeastern portion of the Shell Martinez Manufacturing Complex. The purpose of the C5 Storage Tanks is to store pentane and other C5s,which will be used in the final gasoline blending. The C5 Storage Tanks consist of three eighty-foot diameter spheres and pumps to transfer the C5s to gasoline blending or to tankcar loading. The C5s will take the place of higher volatile compounds, such as butane, in the new gasoline blend. CCCHSD Findings: CCCHSD recommended that the following items be implemented as part of Condition#22 for the startup of the C5 Storage Tanks. 1.a. The check valves to prevent backflow from the flare header should be inspected at a minimum during every turnaround. C5 Tanks Cond #23,Page It 1/2 M. T Z iV 1.b. Shell is to provide to CCCHSD, by June 30, 1995, the protections in place for preventing butane and other Cos from other process units from entering the C5 storage tanks. 1.c. Shell is to test the pressure instrumentation on the storage tanks (PI-2506, PI-2521 and PI-2533) frequently enough to ensure a minimum of 95% availability of these pressure instruments and associated alarms. 1.d. Natural gas is the backup blanket gas for the storage tanks. If there is a loss of instrument air to the control valves for the natural gas to the storage tanks, both control valves will fail open. The pressure of the natural gas header is higher then the relief pressure of the pressure safety valves that go to the atmosphere on the storage tanks. If both of the control valves would fail open, the relief valves could relieve to the atmosphere. Shell is to investigate and report the findings to CCCHSD for modifying the failsafe position of one of the natural gas control valves to fail close, upon loss of instrument air. Implementing the above items, along with the safeguards that Shell has designed into the C5 storage tanks will reduce the risk of an offsite exposure. With these changes, CCCHSD will be able to accept the project for the storage tanks. The following is a listing of the results of CCCHSD recommendations: 1.a. Shell has agreed to inspect the check valves in the flare header, at a minimum, during every turnaround. 1.b. CCCHSD has reviewed the protections in place for preventing butane and other C4s from the debutanizer and gasoline column and from the CGDP from entering the C5 Storage Tanks. CCCHSD believes that the protections put in place by Shell are adequate to ensure C4s from entering the C5 Storage Tanks from these sources. There is one other stream where C4s may be present that could enter the C5 Storage Tanks. Before these streams are routed to the C5 Storage Tanks, Shell is to submit to CCCHSD the protections that are in place to ensure that C4s are prevented from entering the C5 Storage Tanks. 1.c. Shell has agreed to test the listed instrumentation to ensure a minimum of 95% availability. 1.d. Shell has submitted to CCCHSD the protections that are in place to prevent the possibility of natural gas at header pressure from entering the C5 Storage Tanks. CCCHSD believes there is enough redundancy in place to protect the C5 Storage Tanks from the full natural gas header pressure. cc: CalARP Team C5 Tanks Cond#23, Page N2/2