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Home My WebLink AboutMINUTES - 10221996 - C52 'TO: BOARD OF SUPERVISORS - _ Contra Costa FROM: HARVEY E. BRAGDON DIRECTOR _OF COMMUNITY DEVELOPMENT 'c�e. :�� County DATE: October 22, 1996 SUBJECT: Ratification of the Zoning Administrator's Decision Regarding Shell Oil Company's Compliance with Conditions of Approval (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 Sulfur Recovery Unit No. 4 and the Sour Water Tank. 2 . Ratify the Zoning Administrator' s decision that Shell Oil Company has complied with Condition of Approval #35B for the Boiler Feedwater Treatment Unit. 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 October 21, 1996. Any comments received at the meeting will be forwarded to the Board. CONTINUED ON ATTACHMENT: XX YES SIGNAT RECOMMENDATION OF COUNTY ADMINISTRATOR RECOMMENDATION OF ARD COMMITTEE APPROVE OTHER S I GNATURE (S) ACTION OF BOARD ON October 22, 1996 APPROVED AS RECOMMENDED X OTHER VOTE OF SUPERVISORS I HEREBY CERTIFY THAT THIS IS A X 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: Debbie Sanderson (510/335-1208) ATTESTED October 22, 1996 cc: Community Development Department (CDD) PHIL BATCHELOR, CLERK OF Shell Oil (via CDD) BOARD OF SUPERVISO COUN aD1TYY NIS TOR COKE aw ck(2)\sh110-22.bo Board Order October 22, 1996 Page 2 Condition of Approval #23 -- Implementation of mea ures 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 June 11, 1996, the Board of Supervisors ratified the Zoning Administrator' s finding that Shell had completed the required hazards and operability studies for the Sulfur Recovery Unit No. 4 and the Sour Water Tank. These studies required Shell to implement certain measures prior to start up of each unit. As required by Condition #23, County Health Services staff has field checked these two units and has verified that each of the measures detailed in the approved studies has been implemented. On September 26, 1996, County Health Services Department confirmed that Shell Oil Company has implemented measures detailed in its approved hazards operability study and its accident consequence analysis for the Sulfur Recovery Unit No. 4 . On August 30, 1996, County Health Services Department confirmed that Shell Oil Company has implemented measures detailed in its approved hazards operability study and its accident consequence analysis for the Sour Water Tank. Condition of Approval #35B - 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. Shell Oil has submitted the results of their noise monitoring which demonstrated that the Boiler Feedwater Treatment Unit identified in Recommendation #2 meets the noise standards. (Attachment B) COK\aw j:\sh110-22.bo a i • -- - ATTACHMENT A .Rt. . .. Health Services Department cAa>as •.oma, •1,�/� ENVIRONMENTAL HEALTH DIVISION • NSD-cs3o-4 � OCCUPATIONAL HEALTH/HAZARDOUS MATERIALS SWT T'� �ovri DATE: August 30, 1996 TO: Catherine Kutsuris, County Zoning Administrator, Community Development Department ATTN: Debra Sanderson FROM: Lewis G. Pascalli, Deputy Director , Health Services Dep azardous Materials Division SHELL REFINERY CLEAN FUELS PROJECT CONDITION#23 COMPLIANCE SOUR WATER TANK ss#####**s*hk#s*+k##ws+k*s+k#+h##w##s##*###s####ts#s#s#ss#*M#ssssR#ssssst#s*+ks#* The Contra Costa County Health Services Department (CCCHSD) Hazardous Materials Risk Management and Prevention Program team has completed pre-startup reviews for the Shell Refinery's Sour Water Tank as required by Condition No. 23. We find that mitigations cited by Shell in the approved HAZOP studies have been implemented and recommend Board of Supervisors ratification of Condition 23 for these units. This tank is currently in a start- up/testing period. 62-,- Contra ZContra Costa Count Health Services Department _ P J ENVIRONMENTAL HEALTH DIVISION HAZARDOUS MATERIALS/OCCUPATIONAL HEALTH y DATE: September 26, 1996 TO: Catherine Kutsuns, County Zoning Administrator, Community Development Department ATTN: Debra Sanderson FROM: Lewis G. Pascalli, Jr. Deputy Director ` Health Services DepartL, dous Materials Division SHELL REFINERY CLEAN FUELS PROJECT CONDITION #23 COMPLIANCE SULFUR RECOVERY UNIT NO. 4 ***«*****�***��*s**�rs«««at��**.*:*s*w******«�*s*«***�***.**s*+►��r*�•�««�+�** The Contra Costa County Health Services Department (CCCHSD) Hazardous Materials Risk Management and Prevention Program team has completed pre-startup reviews for the Shell Refinery's Sulfur Recovery Unit No. 4 as required by Condition No. 23. We find that mitigations cited by Shell in the approved HAZOP studies have been implemented and recommend Board of Supervisors ratification of Condition 23 for these units. This unit is currently in a start-up/testing period. • I • ATTACHMENT B w��ww %0S TA py 1: 32 P.O.Box 711 Martinez,California 94553-0071 GC7 c�,; t• rT,'pEPT TNePhone: (510)31330 COQ. 3 �65o Y 3�-96� 60;10. FeR.dwakl-I September 30, 1996 1> ma4i CLI Ms. Debbie Sanderson C B FTv� 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 MONITORING REPORTS FOR (COUNTY FILE NUMBER 2009-92) 2.o;k:r Fadwea#et, I tea;ltnwwt LLL,t U PWT• In compliance with the Clean Fuels Project Land Use Permit Condition #35B and Mitigation Measure 10-4, we are submitting the operational noise measurements for the Boiler Feedwater Treatment Unit. These report is consistent with the Monitoring Protocol previously approved and demonstrate that these elements comply with the requirements defined in Condition 35A. We understand, according to the Land Use Permit General Condition#4 that the Zoning Administrator's decision regarding this submittal shall be placed on the Consent Calendar of the Board of Supervisors' meeting for ratification. We would appreciate your assistance on having these operational noise calculations expeditiously reviewed and placed on the Board's Consent Calendar. If you have any questions regarding this information, please contact me at (510) 313-3695. Very truly yours, E. T. Swieszcz, Staff Engineer Environmental Affairs Enclosure: ' a r • OPERATING NOISE MEASUREMENT REPORT FOR THE BOILER FEEDWATER TREATMENT UNIT SHELL MARTINEZ MANUFACTURING COMPLEX CLEAN FUELS PROJECT—BECHTEL JOB NO. 22500 Report Prepared By: Date: Noise Measurement Made By: On: J,ot�/ &tz-- /7 /7 4t X996 /996 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. � I • SHELL MARTINEZ MANUFACTURING COMPLEX CLEAN FUELS PROJECT-BECHTEL JOB NO.22500 OPERATING NOISE MEASUREMENT REPORT FOR THE BOILER FEEDWATER TREATMENT UNIT 1. INTRODUCTION Measurements of operating noise from the Boiler Feedwater Treatment Unit of the Clean Fuels Project at Shell Martinez Refinery were made on 6 September 1996. The purpose of the noise measurements was to demonstrate that the Boiler Feedwater Treatment Unit meet Condition No. 35A from the Contra Costa County's Land Use Permit No. 2009-92. These measurements were made according 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. These measure- ments show that the Boiler Feedwater Treatment Unit complied with the County's noise perform- ance standard of 77 dBA at 100 feet from equipment and 5 feet above grade on all four sides of the Unit. The 77 dBA limit is defined in the Protocol to be an LSo, the A-weighted sound pres- sure level that is exceeded 50 percent of the time during a sampling period. 2. MEASUREMENT LOCATIONS Four to six measurement locations were selected for each of the four sides of the Unit. These locations are shown on Figure 1, a plot plan showing the layout of the Boiler Feedwater Treatment (BFWT) Unit. All measurements were made 5 feet above the grade of the BFWT Unit. Since the BFWT Unit is relatively quiet and noise levels around the Unit were signifi- cantly affected by noise from adjacent Units, all measurements were made at substantially less than 100 feet from the Equipment Perimeter. The Equipment Perimeter is a straight line along each side of the Unit so that the equipment on that side falls inside the line. Measurements were made at the following distances from the Equipment Perimeter: Distance from Equipment Side of Perimeter Unit (feet) Comments South 25 To reduce noise levels from existing Units located to the south, measurements were made on a line 25 feet south of the Equipment Perimeter. East 60 To reduce noise levels from a cooling tower located to the east, measurements Were made on a line 60 feet east of the Equipment Perimeter, and directly underneath an overhead pipe rack. North 0 or 50 The Nitrogen Supply System and a Control Building are located to the north. Near the Control Building, measurements were made 50 feet north of the Equipment Perimeter, because the Control Building m:\asok\noiserep.BFW Page 1 of 5 September 17, 1996 a • blocked measurements much further north. Since the Nitrogen Supply System is located directly adjacent to the BFWT Unit, some of the measurements were made on the north Equipment Perimeter, where there were no near-by BFWT Unit noise sources. West 40 The Cogeneration Unit is located less than 200 feet west, and meas- urements were made on a line 40 feet west of the BFWT Unit's Equipment Perimeter. 3. INSTRUMENTATION The following instrumentation was used in making the noise measurements: o Hewlett Packard 3569A, Sound Level Analyzer with Octave Bands o Bruel and Kjaer 4134, Microphone o GenRad P42, Preamplifier o Bruel and Kjaer 4230, Acoustic Calibrator o Windscreen. 4. OPERATING CONDITIONS DURING MEASUREMENTS The Boiler Feedwater Treatment Unit was operating at slightly above its design capacity. A portable water treatment unit, mounted in a truck trailer, was also operating. To the south, there are existing Units, which are not part of the Clean Fuels Project, and a pipe rack. An existing cooling tower is located to the east. The Nitrogen Supply System and a Control Building are located to the north. The Cogeneration Unit is located to the west. All of the nearby Units and pipe racks were operating and generating noise. During the measurements, there were no observable construction activities in and around the Boiler Feedwater Treatment Unit. All adjacent Units in each of four directions contribute significantly to the measured noise levels at 100 feet outside the Equipment Perimeter. 5. MEASUREMENTS Measurements of total noise levels during operation of the Boiler Feedwater Treatment Unit were made on 6 September 1996 by 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. Instruments used in making the noise measurements were in accor- dance with the Protocol. The levels measured were recorded directly on the analyzer as an L50. Instruments were calibrated both before and after the measurements. 6. DEVIATIONS FROM PROTOCOL Measurements were made according to tfie Protocol. For reasons indicated in Section 2, all measurements were made closer than 100 feet from the Equipment Perimeter. Noise levels measured closer than 100 feet are expected to be higher than that would be measured at 100 feet.' m:\asok\noiserep.BFW Page 2 of 5 September 17, 1996 a • 7. RESULTS Both the measured background and operational noise levels are given in Table 1. The levels in Table 1 are A-weighted L50 sound pressure levels measured for a 5-minute period. The results are logarithmically averaged for each side as specified in the Protocol. While correction of data for background levels is permitted in the Protocol, the data in Table 1 were not corrected for background. During operational noise measurements, background noise on all sides from operation of adja- cent Units was judged to have a significant impact on the measured levels. Noise from adjacent units significantly contaminates the measured levels, and the levels from the BFWT Unit are significantly lower than the measured levels (see Section 8). Construction noise was judged to have a negligible impact on the measurements. 8. CONCLUSION Measurements were made while the Boiler Feedwater Treatment Unit was operating normally as stated in Section 4 of this report. On each of the four sides of the Boiler Feedwater Treatment Unit, the computed noise levels from the plant meets the County's noise performance standard of 77 dBA at 100 feet or less from the Equipment Perimeter and 5 feet above grade. This limit has been met at distances of less than the required 100 feet on four sides. Even though the measured levels are contaminated by noise from adjacent units, they are still low enough that 77 dBA limit is met. m:\asok\noiserep.BFW Page 3 of 5 September 17, 1996 c 5z TABLE 1 Measured Operational Noise Levels for the Boiler Feedwater Treatment Unit I Side Distance Sound Pressure Level in dBA Of From Measurement Measured Total Average Operational. Unit EP* Location Operational for Side South 25 ft. 2 76.0 3 77.0 4 74.9 5 72.2 6 72.1 7 73.9 Logarithmic Average 74.7 East 60 ft. 7 73.9 8 72.1 9 71.7 10 68.9 Logarithmic Average 72.0 North 0 or 50 ft. 10 68.9 11 69.6 12 74.5 13 74.9 14 76.5 15 76.7 Logarithmic Average 74.5 West 40 ft. 15 76.7 16 76.7 17 75.2 2 76.0 Logarithmic Average 76.2 * EP =Equipment Perimeter m:\asok\noiserep.BFW Page 4 of 5 September 17, 1996 a � -.F---- -t- a m �n M V -- — — — — _ ---------- --- „0-,0995 '_ G=` Ml v c C V t �h o a i 1 i 0I " c to ! 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