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HomeMy WebLinkAboutOCSD 13-04 RESOLUTION NO. OCSD 13-04 CERTIFYING THE FINAL SUBSEQUENT ENVIRONMENTAL IMPACT REPORT FOR THE SLUDGE DEWATERING AND ODOR CONTROL AT PLANT NO. 2, PROJECT NO. P2-92; ADOPTING A STATEMENT OF OVERRIDING CONSIDERATIONS; ADOPTING A MITIGATION MONITORING AND REPORTING PROGRAM; AND APPROVING THE PROJECT WHEREAS, the Orange County Sanitation District(OCSD) is presently considering the approval of a project known as the Sludge Dewatering and Odor Control at Plant No. 2, Project No. P2-92 (proposed Project), WHEREAS, the environmental impacts of the proposed Project were previously analyzed in the 1999 Strategic Plan Program Environmental Impact Report, State Clearinghouse No. 97101065, and in the Secondary Treatment and Plant Improvement Project Subsequent Environmental Impact Report, State Clearinghouse No. 2004031076,pursuant to the California Environmental Quality Act, Public Resources Code §§21000 et seq. and California Code of Regulations, Title 14, §§ 15000 et seq. (CEQA); WHEREAS, OCSD has caused to be prepared the Draft Subsequent Environmental Impact Report (Draft SEIR) for the proposed Project that assesses the significant environmental impacts, mitigation measures, and alternatives associated with the proposed Project; WHEREAS, OCSD has consulted with other public agencies and the general public, and provided such agencies and the public with the opportunity to provide written and oral comments on the proposed Project and the Draft SEIR as required by CEQA, including a public review period of 45 days which commenced on October 18, 2012 and ended on December 3, 2012; WHEREAS, on November 15, 2012, OCSD staff held a public hearing to provide a further opportunity for public agencies and the general public to comment on the Draft SEIR; WHEREAS, OCSD has reviewed the comments received and responded to the environmental concerns raised during the review and consultation process; WHEREAS, the comments received on the Draft SEIR, either in full or in summary, together with the OCSD responses have been included in the Final SEIR for the proposed Project; 1 WHEREAS, the Final SEIR, consisting of the Draft SEIR and the Responses to Comments Received on the Draft SEIR, has been presented to OCSD's Board of Directors (the Board) for review and consideration prior to the approval of, and commitment to, the proposed Project. NOW, THEREFORE, the Board hereby resolves, determines and finds, as follows: 1. That the Final SEIR has been completed in compliance with the requirements of CEQA; 2. That the Board has independently reviewed and considered the information contained in the Final SEIR and the Final SEIR reflects the independent judgment and analysis of the Board; 3. That the Board makes the findings set forth herein as Attachment A and certifies that such findings are based on the Board's independent review of the information contained in the Final SEIR and reflect the independent judgment and analysis of the Board; 4. That changes or alterations have been required in, or incorporated into, the proposed Project which avoid or substantially lessen certain significant effects of the proposed Project; 5. That certain environmental impacts of the proposed Project are significant and unavoidable even after implementation of mitigation measures incorporated into the proposed Project; 6. That the Board adopts the Statement of Overriding Considerations, attached as Attachment B, which identifies the specific benefits of the proposed Project that outweigh the proposed Project's significant and unavoidable impacts which are acceptable in light of the proposed Project's benefits; 7. That the Board adopts the Mitigation Monitoring and Reporting Program (MMRP), attached as Attachment C to ensure that all mitigation measures identified in the Final SEIR are implemented; 8. That the General Manager is authorized and directed to the file the Notice of Determination(NOD) and any other documents in accordance with the requirements of CEQA and the Agency's CEQA procedures; and 9. That the Board approves the Sludge Dewatering and Odor Control at Plant No. 2, Project No. P2-92. 2 10. The record of proceedings on which the Board's decision is based is located at OCSD Administration Offices, 10844 Ellis Avenue, Fountain Valley, CA 92708 and the custodian of records is the Clerk of the Board. PASSED AND ADOPTED at a regular meeting held March 27, 2013. =h&q �& Troy Edgar, hoard Chair ATTEST: 04�� Maria E. Ayala, Clerk of the Board 3 Attachment A Findings of Facts 912189.1 ATTACHMENT A Findings of Fact I. Final SEIR for the Project The Final Subsequent Environmental Impact Report (Final SEIR), prepared pursuant to Section 15089 of the CEQA Guidelines, consists of the Draft SEIR, comment letters received on the Draft SEIR, and responses to those comments. II. The Administrative Record Contents of the Record The following information is incorporated by reference and made part of the record supporting these findings and the actions taken by Orange County Sanitation District (OCSD) in certifying the Final SEIR and approving the proposed Project: 1. The Final SEIR and all documents relied upon or incorporated by reference in the Final SEIR. 2. All testimony, documentary evidence, and all correspondence submitted to or delivered to OCSD in connection with the meetings and public hearings at which the Draft SEIR or Final SEIR was considered by OCSD. 3. All staff reports, memoranda, maps, slides, letters, minutes of meetings and other documents relied upon or prepared by OCSD staff and consultants relating to the project. 4. Any other documents specified by Public Resources Code section 21167.6(e). Location of Administrative Record OCSD is the custodian of the administrative record, including all CEQA documents and the other background documents and materials that constitute the record of the proceedings in which the Board's decision to certify the Final SEIR and approve the project are based. The administrative record is located at OCSD's Administrative Office Building at 10844 Ellis Avenue, Fountain Valley, California, 92708. III. Purpose of Findings The Final SEIR, prepared in accordance with CEQA, evaluates the significant adverse environmental impacts that could result from the Project. CEQA Guidelines Section 15091 requires that the public agency approving or carrying out the project shall make OCSD P2-92 Sludge Dewatering and Odor Control Project 1 ESA/211260 912189.1 Attachment A:Findings of Facts written findings for each significant impact identified in the EIR, accompanied by a brief explanation of the rationale for each finding. These findings include one of the following: 1. Changes or alterations have been required in, or incorporated into, the project which avoid or substantially lessen the significant environmental effect as defined in the Final SEIR. 2. Such changes or alterations are within the responsibility and jurisdiction of another public agency and not the agency making the finding. Such changes have been adopted by such other agency, or can and should be adopted by such other agency. 3. Specific economic, legal, social, technological, or other considerations, including provision of employment opportunities for highly trained workers, make infeasible the mitigation measures or project alternatives identified in the Final SEIR. These findings accomplish the following: 1. They address the significant environmental effects identified in the EIR for the approved project. 2. They incorporate all mitigation measures associated with these significant impacts identified in either the Draft SEIR or Final SEIR. 3. They explain why a significant effect is avoided or reduced by the adopted mitigation measures to a less than significant level. The conclusions presented in these findings are based on the Initial Study, the Draft SEIR, the Final SEIR, and other evidence in the record of proceedings. IV. Effect of Findings To the extent that these findings conclude that various proposed mitigation measures outlined in the Final SEIR are feasible and have not been modified, superseded, or withdrawn, OCSD hereby binds itself to implement these mitigation measures. These findings, in other words, are not merely information. The mitigation measures identified as feasible and within OCSD's authority to implement for the approved project are expressed conditions of approval to which OCSD binds itself upon adoption of this resolution and project approval. The Board will adopt a Mitigation Monitoring and Reporting Program (MMRP) concurrently with these findings to ensure that all of the mitigation measures identified in the Final SEIR are implemented. The MMRP includes applicable mitigation measures developed as part of the EIR process for the proposed Project. V. Project Background In 1999, OCSD adopted the OCSD Master Plan (Strategic Plan) and the Strategic Plan Program EIR (1999 PEIR). The Strategic Plan addressed all aspects of OCSD's system facilities and operations. The existing sludge dewatering and odor control system were installed over 25 years ago and were identified in the Strategic Plan as in need of OCSD P2-92 Sludge Dewatering and Odor Control Project 2 ESA/211260 912189.1 Attachment A:Findings of Facts replacement. The certified 1999 PEIR proposed to rebuild 15 belt filter press dewatering facilities and refurbish three 80-foot diameter digesters and three holding tanks at Treatment Plant 2. The proposed modification of the belt filter presses would have constituted a replacement of the same technology. In 2003, OCSD prepared a Long-Range Biosolids Management Plan that recommended replacement of the existing belt filter presses with centrifuges (a new technology) rather than replacement of the belt filter presses with like equipment. As such, OCSD modified the sludge dewatering and odor control system project to include centrifuges rather than belt filter presses. In 2005, OCSD certified a Secondary Treatment and Plant Improvement Project EIR (2005 EIR), which analyzed the environmental impacts of proposed upgrades to OCSD's secondary treatment capacity to meet secondary treatment standards. As a part of the Secondary Treatment project, the P2-92 facility was planned to upgrade the biosolids handling facilities by replacing existing belt filter presses with centrifuges as recommended by the 2003 Long-Range Biosolids Management Plan. The new technology and updated building features included six new centrifuges, replacement of the existing odor control system with an upgraded system, retrofitting of the existing dewatering building, replacement of the existing polymer system with an upgraded system, and replacement and/or upgrade of other ancillary equipment. This change in technology compared to the project analyzed in the 1999 PEIR triggered subsequent environmental review. The 2005 EIR included the required subsequent environmental review for the P2-92 project. The currently proposed Project is similar to the P2-92 facility described in the 2005 EIR, except that the current Project proposes to build two new buildings rather than update the existing building. Project Description OCSD proposes to implement the Sludge Dewatering and Odor Control Project at Plant 2. The existing sludge dewatering and odor control systems were installed over 25 years ago and are in need of replacement. The proposed Project would also include a power distribution center, electrical and process control systems, and utilities in support of the new sludge dewatering and odor control systems. After construction of the new facilities, the proposed Project would require the demolition of the existing sludge dewatering and odor control systems at Plant 2. The proposed Project would be constructed entirely within the existing Plant 2 property. The proposed Project would not expand the capacity of the existing wastewater treatment facility. Need for Project The 2003 Long Range Biosolids Management Plan recommended that the existing belt presses be replaced with centrifuges to improve the dewatering process and reduce solids OCSD P2-92 Sludge Dewatering and Odor Control Project 3 ESA/211260 912189.1 Attachment A:Findings of Facts storage and truck hauling costs. The 2003 Long-Range Biosolids Management Plan was developed to create a sustainable, reliable, and economical program for long-range biosolids management. Centrifuges produce drier biosolids, which reduces the amount of required truck hauling. The objectives of the proposed Project include the following: • Replace outdated maintenance intensive machines with newer technology. • Reduce dewatered biosolids cake hauling costs. • Produce drier biosolids cake material. • Reduce fenceline odors by improving odor control at the existing truck loading silos and from the centrifuge dewatering operation. The Final SEIR was prepared in compliance with CEQA. In accordance with CEQA Guidelines Section 15082, a Notice of Preparation (NOP) was published by OCSD on April 23, 2012. The NOP was circulated to local, state, and federal agencies and other interested parties for 30 days. The NOP comment period ended on May 23, 2012. In accordance with CEQA Guidelines Section 15082, the Draft SEIR was circulated to local, state, and federal agencies and other interested parties who wished to review and submit comments on the Draft SEIR. The 45-day public review period began on October 18, 2012 and ended on December 3, 2012. A public hearing to receive public comments on the proposed Project was held on November 15, 2012 at the OCSD Administrative Office Building in the City of Fountain Valley. A total of four(4) written comment letters were received on the Draft SEIR. The Final SEIR for the P2-92 Sludge Dewatering and Odor Control Project consists of the Draft SEIR, Response to Comments on the Draft SEIR, and OCSD initiated editorial refinements. VI. Findings Concerning Significant Unavoidable Adverse Impacts The following impacts were identified in the Final SEIR as significant and unavoidable. Air Quality- Cumulative Operations A. Facts 1. The Draft SEIR analyzes cumulative air emissions in Section 4.2-3. Based on the analysis in the 1999 PEIR, which had analyzed the mobile emissions associated with delivery truck trips to OCSD's Plant 1 and Plant 2 facilities, it was determined that mobile NOx emissions would exceed SCAQMD's significance threshold for operational emissions. Despite implementation of Mitigation Measures 6.5-3a through 6.5-3d, this impact was found to be significant and unavoidable in the 1999 PEIR. Because the proposed Project was previously OCSD P2-92 Sludge Dewatering and Odor Control Project 4 ESA/211260 912189.1 Attachment A:Findings of Facts analyzed in the 1999 PEIR and impacts were found to be significant and unavoidable, the daily operational emission levels of NOx generated by mobile trips to OCSD's Plant 1 and Plant 2 facilities would continue to be significant and unavoidable. However, the proposed Project would actually reduce overall existing truck trips associated with biosolids hauling. The proposed Project would therefore reduce the daily operational emission levels of NOx generated by mobile trips to OCSD's Plant 2 facilities.. The Final SEIR did not identify any new significant impacts in this area, and, therefore, no additional mitigation measures are required. 2. Mitigation Measures 6.5-3a through 6.5-3d are from the 1999 PEIR MMRP. Mitigation Measure 6.5-3a requires OCSD to maintain its ride-share programs to reduce commuter traffic and air quality impacts. Mitigation Measure 6.5-3b and 6.5-3c requires the implementation of compressed natural gas (CNG) stations, the use of CNG-powered engines on haul trucks, and the use of alternative fuels on haul trucks. Mitigation Measure 6.5-3d requires OCSD to research alternative methods of transporting biosolids. Implementation of 1999 PEIR mitigation measures would not reduce emissions to less than significant levels. The daily operational emission levels of NOx generated by mobile trips to OCSD's Plant 1 and Plant 2 facilities would not change as a result of the proposed Project with implementation of mitigation measures. 3. In response to SCAQMD's suggestion that the lead agency consider requiring the use of 2010 and newer diesel haul trucks (e.g., material delivery trucks and biosolids haul trucks), OCSD has added Mitigation Measure 4.2-1 to the Final SEIR. Mitigation Measure 4.2-1 requires OCSD to incentivize the use of newer biosolids haul trucks by awarding points to haul contract bidders that commit to using 2010 or newer fleets. B. Findings The Board finds that: 1. Air quality impacts related to cumulative air emissions of NOx would be significant and unavoidable; the proposed Project and mitigation measures described will reduce this impact,but not to a level of insignificance. 2. This impact is overridden by project benefits as set forth in the statement of overriding considerations adopted concurrently herewith. Noise and Vibration - Construction A. Facts 1. The Draft SEIR analyzes noise and vibration impacts in Section 4.5. Sensitive receptors located in proximity to the Project site could experience noise levels as OCSD P2-92 Sludge Dewatering and Odor Control Project 5 ESA/211260 912189.1 Attachment A:Findings of Facts high as 73 dBA Leq during non-pile driving construction activities and 85 dBA Leq when pile driving occurs. As construction of the proposed Project might temporarily increase ambient noise levels by more than 5 dBA, construction noise impacts with respect to a temporary or periodic increase in ambient noise levels in the Project vicinity would be potentially significant. 2. Mitigation Measures 4.5-1 and 4.5-2 would be implemented requiring the implementation of noise reduction devices and techniques during construction at the Project site. Mitigation Measures 6.4-la through 6.4-le of the 1999 PEIR, which would require the use of noise muffling devices on construction equipment and notification of neighboring residential areas, will also be implemented. Implementation of these mitigation measures would serve to reduce the noise levels associated with construction of the proposed Project to the maximum extent feasible. Despite implementation of these mitigation measures, daytime noise levels from construction of the proposed Project, especially during pile driving operations, is still expected to substantially exceed the existing daytime ambient levels at the nearby residential uses and thus could result in a substantial disturbance to these sensitive receptors. B. Findings The Board finds that: 1. Noise impacts during construction at the Project site would be significant and unavoidable; the mitigation measures described above are adopted and will reduce this impact,but not to a level of insignificance. 2. Noise impacts are temporary in nature and will cease upon construction completion. 3. This impact is overridden by project benefits as set forth in the statement of overriding considerations adopted concurrently herewith. VII. Findings Concerning Significant Impacts Reduced to Less Than Significant Levels by Mitigation Measures Incorporated into the Project The Final SEIR identifies significant impacts that are reduced to a "less than significant" level provided that the mitigation measures identified in the Final SEIR are incorporated into the proposed Project. These measures avoid, minimize, rectify, or reduce the significant environmental effects identified in the Final SEIR to a less than significant level. Air Quality A. Facts OCSD P2-92 Sludge Dewatering and Odor Control Project 6 ESA/211260 912189.1 Attachment A:Findings of Facts 1. Construction emissions of the proposed Project would not exceed the maximum SCAQMD daily significance thresholds for criteria pollutants (ROG, NOx, CO, S02, PM10, and PM2.5). Implementation of the 1999 PEIR Mitigation Measure 6.5-la and 6.5-1b requiring proper maintenance of equipment engines and requiring trucks and vehicles in loading or unloading queues to turn off their engines would further reduce the less than significant construction emissions of the proposed Project. 2. The nearest sensitive receptors to the proposed Project site are located approximately 305 feet away. The peak daily emissions generated during a worst- case construction day within the proposed Project site during Project construction would not exceed the applicable construction localized significance thresholds (LSTs) for a two-acre site in the sensitive receptors area. Proposed Project construction would not expose sensitive receptors to substantial emissions of toxic air contaminants (TACs) because the use of off-road heavy-duty diesel equipment would be temporary and due to the highly dispersive properties of diesel PM. Mobile source emissions under the proposed Project would be slightly less than that of the existing facility, and would not increase in magnitude as analyzed in the 1999 PEIR. 3. Mitigation Measures 6.5-2a and 6.5-2b of the 1999 PEIR ensure that criteria pollutant and air toxics emissions from stationary sources at Plant 2 comply with SCAQMD rules and permit requirements. 4. Odors associated with proposed Project construction and demolition of the existing sludge dewatering and odor control facility would be temporary and intermittent in nature. Mitigation Measure 4.2-2 shall minimize odors from demolished equipment at Plant 2 during Project construction. Mitigation Measure 6.5-5b of the 1999 PEIR requires OCSD to provide odor control systems to reduce construction odor impacts when necessary. 5. The new odor control system under the proposed Project would be equipped with more advanced technology than the existing odor control system, an improvement in odor control is expected during its operation at Plant 2. Mitigation Measure 4.2-3 requires OSCD to prepare an odor study with odor modeling of the new odor control system at Plant 2 to ensure that odors generated at Plant 2 would be minimized to the maximum extent feasible. Mitigation Measure 6.5-5a of the 1999 PEIR would require periodic review of odors at Plant 2. B. Findings The Board finds that: 1. The recommended mitigation measures in the Final SEIR and 1999 PEIR are adopted. The mitigation measures will ensure the Project's impacts to air quality, OCSD P2-92 Sludge Dewatering and Odor Control Project 7 ESA/211260 912189.1 Attachment A:Findings of Facts other than cumulative air emissions addressed above, are reduced to less than significant levels. Cultural Resources 1. As Plant 2 is an active wastewater treatment facility and is previously disturbed due to construction and upgrades of the plant, it is not anticipated that the proposed Project would disturb any human remains. However, in the unlikely event that human remains are found, Mitigation Measure 7.10-2c from the OCSD 1999 Strategic Plan EIR would apply. B. Findings The Board finds that: 1. The recommended mitigation measure in the Final SEIR and 1999 PEIR are adopted. The mitigation measure will ensure the Project's impacts to any human remains, are reduced to less than significant levels. Geology, Soils, and Seismicity A. Facts 1. Earthquakes in Orange County potentially could produce strong ground shaking in the project area. The geotechnical study provides seismic design considerations that would ensure the California Building Code (CBC) regulations are followed and seismic-related impacts are minimized. Mitigation Measure 6.6-lb from the OCSD 1999 Strategic Plan EIR will be followed. Therefore, impacts would be less than significant. 2. The project site is located within a State and County Hazard Zone for Liquefaction. Because of the depth to groundwater and the soil types at the site, the potential for liquefaction at the site is high. Mitigation Measure 6.6-l a from the OCSD 1999 Strategic Plan EIR, will be followed to ensure that the recommendations in the Geotechnical Report are followed. Therefore, impacts would be less than significant. 3. Construction of the proposed structures would disturb existing site conditions and could potentially leave loose soil exposed to the erosive forces of rainfall and high winds. Implementation of Mitigation Measures 6.7-l a through 6.7-1 e, as presented in the OCSD 1999 Strategic Plan DEIR, would ensure impacts due to soil erosion or loss of topsoil would be less than significant. B. Findings The Board finds that: OCSD P2-92 Sludge Dewatering and Odor Control Project 8 ESA/211260 912189.1 Attachment A:Findings of Facts 1. The recommended mitigation measures in the Final SEIR and 1999 PEIR are adopted. The mitigation measures will ensure the Project's impacts to geology, soils, and seismicity are reduced to less than significant levels. Hazards and Hazardous Materials A. Facts 1. The Draft SEIR analyzes hazards and hazardous materials impacts in Section 4.4. Adherence to safety regulations, manufacturer's recommendations, and implementation of best management practices (BMPs) would minimize potentially significant hazards to the public involving the the release of hazardous materials to the environment. The OCSD Stormwater Onsite Management Plan identifies BMPs that would be implemented onsite during construction activities. Implementation of Mitigation Measure 4.4-1 would ensure impacts from accidental upset of hazardous materials are minimized through implementation of BMPs for the handling and storage of hazardous materials. 2. Demolition of the existing Plant 2 facilities, including the carbon scrubbing vessel, existing belt filter press building, sludge conveyor system, cake transfer pumps, and truck loading bays and existing sludge storage silos for stations C and D, could release hazardous materials including hazardous chemicals, ACM's, lead-based paints or products, mercury, and PCBs into the environment. Implementation of Mitigation Measure 4.4-2 requires the completion of asbestos, lead, and PCB surveys prior to demolition activities. 3. During operation of the replacement facilities, handling and storage of hazardous materials would be required to comply with existing regulatory standards including compliance with OCSD's Integrated Emergency Response Plan. Implementation of proposed Mitigation Measures 4.4-1 and 4.4-2 would ensure that public health and safety impacts due to the potential release of hazardous materials during Project construction and operation are reduced to less than significant levels. B. Findings The Board finds that: 1. The recommended mitigation measures in the Final SEIR are adopted. The mitigation measures will ensure the Project's hazards and hazardous materials impacts are reduced to less than significant levels. Hydrology and Water Quality A. Facts OCSD P2-92 Sludge Dewatering and Odor Control Project 9 ESA/211260 912189.1 Attachment A:Findings of Facts 1. Construction activities have the potential to result in the accidental release of materials and pollutants associated with heavy machinery and equipment such as oils, fuels, and lubricants. Implementation of Mitigation Measures 6.7-1a through 6.7-1 e, as presented in the OCSD 1999 Strategic Plan EIR, would ensure stormwater runoff does not impact or violate any water quality standards. 2. Construction of the new facilities may require dewatering and construction contractors would be required to conform to the District's Dewatering Specifications. Implementation of Mitigation Measures 6.7-2a through 6.7-2b, as presented in the OCSD 1999 Strategic Plan EIR,would ensure impacts to groundwater during construction are reduced to less than significant levels. 3. The proposed Project would not substantially alter the existing drainage pattern of a site or area through the alteration of the course of a stream or river, or by other means, nor would it substantially increase the rate or amount of surface runoff in a manner that would result in flooding on- or off-site.New area drains would be placed around the building to capture the roof leaders and surface drainage. Implementation of Mitigation Measures 6.7-1a through 6.7-1e would ensure impacts related to stormwater remain at less than significant levels. B. Findings The Board finds that: 1. The recommended mitigation measures in the Final SEIR and 1999 PEIR are adopted. The mitigation measures will ensure the Project's impacts to hydrology and water quality are reduced to less than significant levels. Noise and Vibration A. Facts 1. The Draft SEIR analyzes noise and vibration impacts in Section 4.5. The nearest off-site sensitive receptors to the Project site are located approximately 305 feet from the Project site and could be exposed to outdoor noise levels ranging as high as 73 dBA Leq during non-pile driving construction activities and 85 dBA Leq when pile driving. However, intervening structures, such as the 8-foot wall bordering Plant 2 along Brookhurst Street and the block wall bordering the residences, would partially shield and attenuate noise from construction activities for the residences located across Brookhurst Street. Construction activities associated with the proposed Project are short term and would comply with the noise regulations established in Sections 8.40.090 of the City of Huntington Beach's Noise Ordinance. 2. Mitigation Measures 4.5-1 and 4.5-2 require the implementation of noise reduction devices and techniques during construction at the Project site, including OCSD P2-92 Sludge Dewatering and Odor Control Project 10 ESA/211260 912189.1 Attachment A:Findings of Facts the placement of noise or vibration-generating equipment as far as possible from the nearest residential land uses and the use of sound dampening devices. Implementation of Mitigation Measures 6.4-1 a through 6.4-1 e of the 1999 PEIR limits the hours of construction activities to 7:30 a.m. to 5:30 p.m. requires the use of noise muffling devices on construction equipment, and notification of neighboring residential areas concerning the Project timing and construction schedule. Implementation of these mitigation measures would serve to reduce the noise levels associated with temporary construction of the proposed Project to the maximum extent feasible. 3. Vibration velocities associated with sonic pile drivers could reach as high as approximately 0.734 inch per second PPV at 25 feet from the source activity. This corresponds to a RMS velocity level (in VdB) of 105 VdB at 25 feet from the source activity. The vibration velocity forecasted to occur at the nearest off-site residences would be 0.02 PPV for sonic pile driving and would not exceed 0.2 inches per second during construction of the proposed Project. 4. In terms of human annoyance, the vibration levels forecasted to occur at the nearest off-site residences would be approximately 72 VdB and would not exceed the FTA's 80 VdB threshold for residences or places where people may sleep. 5. Implementation of Mitigation Measure 4.5-1 requires that groundbome vibration construction activities be placed as far as practical from the nearest vibration- sensitive land uses, and would reduce the vibration levels experienced at these sensitive receptors. B. Findings The Board finds that: 1. The recommended mitigation measures in the Final SEIR are adopted. The mitigation measures will ensure the Project's impacts to noise and vibration, other than the ambient noise impacts addressed above, are reduced to less than significant levels. Traffic and Circulation A. Facts 1. The Draft SEIR analyzes air quality impacts in Section 4.6. Total construction trips for the proposed Project would be up to approximately 125 daily temporary truck trips, and Brookhurst Street has available capacity to accommodate this temporary increase. Impacted Brookhurst Street intersections operate at LOS A or B, and the additional 125 temporary truck trips are not anticipated to reduce the LOS to levels beyond the acceptable LOS C and D. Operation of the new facilities would not require additional OCSD full-time employees as the new facilities OCSD P2-92 Sludge Dewatering and Odor Control Project 1 1 ESA/211260 912189.1 Attachment A:Findings of Facts would replace older facilities of similar function. Although operation activities would require up to 5 additional chemical deliveries for the new facilities, the proposed facilities and updated technology would result in drier biosolids which in turn would require fewer biosolids haul truck trips. It is anticipated that the proposed Project would result in 130 fewer biosolids truck trips per month after construction is complete. This would result in a significant net reduction in existing overall truck trips. 2. To minimize potential construction traffic impacts, implementation of Mitigation Measure 4.6-1 would require a detailed schedule and plan from the construction contractor to minimize truck traffic on arterial highways during peak periods and to reduce their impediment on street construction. B. Findings The Board finds that: 1. The recommended mitigation measure in the Final SEIR is adopted. The mitigation measure will ensure Project's impacts to traffic and circulation are reduced to less than significant levels. VIII. Findings Concerning Identified impacts that Were Determined to be Less than Significant without Needing to Identify Mitigation Measures The Final SEIR identifies impacts that are considered to be "less than significant" not requiring mitigation measures. It is hereby determined that the following environmental impacts of the Project will be less than significant. Aesthetics A. Facts 1. The Draft SEIR analyzes aesthetics impacts in Section 4.1. There are no officially-designated State Scenic Highways within the Project area. There would be no impact to a designated State Scenic Highway. 2. Plant 2 is equipped with controlled lighting that eliminates unnecessary lighting during nighttime hours. The lighting system for the new facility would be designed to meet current light minimization requirements and would be similar to the existing facilities that will be replaced. The proposed Project would not introduce any additional lighting. 3. The proposed new facilities, particularly the new Sludge Dewatering Building, would only be partially visible from Brookhurst Street, but would not be visible from the Santa Ana River, Talbert Marsh, or Pacific Coast Highway, due to view obstruction by the existing facilities. Landscaping and screening would partially OCSD P2-92 Sludge Dewatering and Odor Control Project 12 ESA/211260 912189.1 Attachment A:Findings of Facts shield and soften views of the project site. All facilities would be designed and constructed with materials that are compatible with the existing treatment facilities onsite at Plant 2. 4. The new proposed facilities would not exceed the existing maximum height of 86 feet on Plant 2, as the new structures would have a maximum height of approximately 51 feet. The IL zone provides an exception to heights for certain types of structures, including 4 feet parapet walls. The proposed building would be 47 feet high, plus a 3.5 feet parapet wall. The 3.5 parapet wall is exempted from the building height and it is anticipated that the proposed building would be approved by the City via a variance to the zoning code. 5. The proposed Project would require an approval for a height variance and Coastal Development Permit from the City prior to construction. B. Findings The Board finds that: 1. The proposed Project would not create adverse impacts to aesthetics and impacts would therefore be less than significant. No mitigation measures are necessary. Air Quality A. Facts 1. Operation of the proposed Project would replace the existing sludge dewatering and odor control facility at Plant 2 with a newer facility and would not lead to an increase in operational emissions.The proposed Project would replace the existing 25-year old sludge dewatering system and odor control system. 2. A total of 130 fewer biosolids truck haul trips deliveries per month and 5 additional deliveries per month of chemicals to Plant 2 from implementation of the proposed Project are expected. This would result in a significant net reduction in overall truck trips. B. Findings The Board finds that: 1. Construction and operation of the proposed Project will have a less than significant direct impact related to air quality. No mitigation measures are necessary. Global Warming/Climate Change OCSD P2-92 Sludge Dewatering and Odor Control Project 13 ESA/211260 912189.1 Attachment A:Findings of Facts A. Facts 1. The Draft SEIR analyzes global warming/climate change impacts in Section 4.3. The proposed Project's aggregated annual construction and operational emissions would not exceed SCAQMD's 10,000 MT/year CO2e benchmark. Specifically, a total net increase of approximately 4,173 MT/year of CO2e would occur under the proposed Project. Impacts associated with direct and indirect emissions of GHGs by the proposed Project would be less than significant. 2. The proposed Project will aid OCSD in improving its biosolids management system, and would not pose any apparent conflict with the California Air Resources Board (CARB) Scoping Plan Recommended Actions. The proposed Project would support Recommended Action W-2 for the Water Sector to increase water recycling and would therefore be consistent with the Recommended Actions under the CARB Scoping Plan. B. Findings The Board finds that: 1. Construction and operation of the proposed Project would not create newglobal warming and climate change impacts and impacts would be less than significant. No mitigation measures are necessary. Hazards and Hazardous Materials A. Facts 1. The proposed Project is not located within a quarter mile of a school. 2. The proposed Project site is listed on a regulatory agency list for leaking underground storage tanks (LUST); however, site cleanup associated for the two LUST listings has occurred. No known releases have occurred from the existing permitted underground storage tank (PUST). The proposed Project site is not listed on any other regulatory agency list as having had a known release of hazardous materials. 3. There are no public airports or private airstrips within two miles of the proposed Project site. 4. OCSD implements an Integrated Emergency Response Program in accordance with OSHA regulations which addresses worker safety, spill prevention, emergency response, and hazardous materials management. The proposed Project would not interfere with the existing Integrated Emergency Response Program. OCSD P2-92 Sludge Dewatering and Odor Control Project 14 ESA/211260 912189.1 Attachment A:Findings of Facts 5. The use of polymer to improve the dewatering of digested sludge from the digesters before the sludge is dewatered by the centrifuges and the biosolids cake generated at Plant 2 are not considered a hazardous or regulated material. Minor additional quantities of sulfuric acid to support the odor control processes would also be used. The sulfuric acid storage and feed equipment will be located in its own containment area. OCSD would comply with existing and future hazardous materials laws and regulations for the transport, use and disposal of hazardous materials. Implementation of the Integrated Emergency Response Program Program would ensure chemicals are properly stored and handled to minimize spills and protect environment and public health. B. Findings The Board finds that: 1. Construction and operation of the proposed Project will have a less than significant impact related to hazards and hazardous materials, other than those hazards and hazardous materials impacts addressed above. No mitigation measures are necessary. Noise and Vibration A. Facts 1. The proposed Project would be located within Plant 2 and would be replacing a similar facility that is currently in operation at Plant 2. The dewatering building will be designed to insulate the noise of the machinery such that fence-line noise standards would not be exceeded. No increase in worker or delivery truck trips to Plant 2 above existing operating conditions would occur. 2. The proposed Project is not located within an airport land use plan, nor is it located within two miles of a public or private airport. B. Findings The Board finds that: 1. Construction and operation of the proposed Project will have a less than significant impact related to noise and vibration impacts, other than those noise and vibration impacts addressed above. No mitigation measures are necessary. Traffic and Circulation A. Facts OCSD P2-92 Sludge Dewatering and Odor Control Project 15 ESA/211260 912189.1 Attachment A:Findings of Facts 1. The nearest airport is located eight miles northeast from the project site. Due to the proposed Project's distance from the airport and because it is a wastewater treatment plant, no increase in air traffic levels or a change in location of air traffic patterns would occur. 2. The proposed Project does not include the construction or design of any roadway infrastructure that would cause a safety risk to vehicle operations. 3. The proposed Project would not alter roadways, propose lane closures, and does not include any features or elements that would impede emergency access routes or result in long-term impacts to emergency access and maneuverability. 4. The proposed Project would not affect bus routes nor bikeways located along Brookhurst Street as no construction would be conducted in the streets and construction-related vehicular traffic would be short-term and temporary. All construction parking and staging areas would be located onsite at Plant 2 and would not impact public transit routes. Operation of the proposed Project would be similar to existing operation conditions and would not impact public transportation facilities or conflict with applicable policies, plans, or programs. B. Findings The Board finds that: 1. Operation of the proposed Project activities would be temporary and have a less than significant impact. No traffic and circulation mitigation measures are necessary other than those adopted above. Utilities, Service Systems, and Energy A. Facts 1. The Draft SEIR analyzes air quality impacts in Section 4.7. Plant 2 is currently operating under permits issued by the Regional Water Quality Control Board (RWQCB) and the proposed Project is not anticipated to conflict with the current permits. The proposed Project would be in compliance with the RWQCB permits and implementation of OCSD's Onsite Stormwater Management Plan (OSSWMP). 2. OCSD would not be required to provide additional wastewater treatment capacity as the proposed Project has adequate capacity to serve current treatment demands. 3. Plant 2 is equipped with an internal drainage system designed to collect and treat stormwater and collect wastewater and chemical spills from industrial areas of each site,which is then conveyed back to the plant's headwork for treatment. 4. Water needs of the proposed Project during construction would be relatively minor and temporary. Operation of the new facilities would require water supplies ftom OCSD P2-92 Sludge Dewatering and Odor Control Project 16 ESA/211260 912189.1 Attachment A:Findings of Facts City water, reclaimed water, and plant water. All water supply demands would be met for facilities operations. 5. The proposed Project would result in approximately 14,000 cubic yards of demolition and construction waste, which is a minimal amount with respect to the capacity of the Frank R. Bowerman Landfill. In addition, the proposed Project would comply with federal, state, and local statutes and regulations related to solid waste disposal, including recycling program requirements. 6. Implementation of the proposed system would replace the current system with energy efficient pumps and machinery. In addition, the proposed Project would receive electrical power directly from the existing 12 kV Southern California Edison (SCE) /Electric Service Center (ESC) located at the north end of the Plant 2 property and from the new Distribution Center K. The proposed Project would add approximately 3 megavolt ampere (MVA) and remove approximately 1 MVA through demolition of the existing dewatering building, for a projected net demand load of approximately 2 MVA. Upon completion of the proposed Project, SCE / ESC is anticipated to have 12 MVA spare capacity available for future energy needs. B. Findings The Board finds that: 1. Construction and operation of the proposed Project will have a less than significant impact on energy consumption, wastewater treatment, water supply, and landfill capacity, and would comply with applicable regulations. No mitigation measures are necessary. Cumulative Effects A. Facts 1. The Draft SEIR analyzes cumulative impacts in Chapter 5.0 of the Draft SEIR. The Draft SEIR analyzes the project contribution to cumulatively significant effects to aesthetics, air quality, greenhouse gas emissions, hazards and hazardous materials, noise and vibration, traffic and circulation, and utilities, service systems and energy. 2. Significant and unavoidable cumulative impacts regarding cumulative operational air quality and construction noise would occur as a result of the proposed Project, as discussed under Section VI. Findings Concerning Significant Unavoidable Adverse Impacts. 3. No additional significant cumulative effects were identified. OCSD P2-92 Sludge Dewatering and Odor Control Project 17 ESA/211260 912189.1 Attachment A:Findings of Facts B. Findings The Board finds that: 1. Construction and operation of the proposed Project will have less than significant cumulative aesthetics, air quality, greenhouse gas emissions, hazards and hazardous materials, noise and vibration, traffic and circulation, and utilities, service systems, and energy impacts. Growth Inducment A. Facts 1. The Draft SEIR discusses growth inducing impacts in Chapter 6. According to the Draft SEIR, the Project would have no potential to directly foster population growth or to result in the construction of additional housing because the Project would update and replace existing outdated facilities, but would not expand the capacity of the existing Plant 2. Project activities are not expected to create substantial employment opportunities beyond the level normally available to construction workers in the area. B. Findings The Board finds that: 1. The recommended Project would not induce growth to the project area. IX. Findings Concerning Alternatives This Final SEIR is subsequent to the environmental analysis presented in the 1999 EIR and the Secondary Treatment and Plant Improvement Project Subsequent EIR (2005). These two EIRs identified and analyzed proposed alternatives for facility improvements at Plant 2. These alternatives have been eliminated from further consideration for this proposed Project. No Project Alternative Under the No Project Alternative, OCSD would not implement the proposed changes to the P2-92 Sludge Dewatering and Odor Control Project and would implement the P2-92 Sludge Dewatering and Odor Control Project as approved in the 2005 EIR. The P2-92 facility described in the 2005 EIR is similar to the proposed Project, except that the current Project proposes to build two new buildings, rather than update the existing structures. Construction of two new buildings (dewatering building and power distribution center) would not occur under the No Project Alternative. The following components would occur under the No Project Alternative: the new technology and updated building features included six new centrifuges, replacement of the existing odor OCSD P2-92 Sludge Dewatering and Odor Control Project 18 ESA/211260 912189.1 Attachment A:Findings of Facts control system with an upgraded system, retrofitting of the existing dewatering building, replacement of the existing polymer system with an upgraded system, and replacement and/or upgrade of other ancillary equipment. The Board finds that this alternative is less desirable than the proposed Project and rejects this alternative for the following reasons: 1. Although the Draft SEIR concluded that the No Project Alternative would meet all of the Project Objectives, upgrading the existing building as proposed in the No Project Alternative was found to be less efficient than constructing an entirely new building. The proposed Project met the District's goal of ensuring efficient wastewater treatment facilities over the long term. 2. Although the proposed Project would have slightly higher impacts for all of the environmental resource areas due to the construction activities associated with the new buildings that would increase the proposed Project footprint and duration compared to the No Project Alternative, the proposed Project would construct a new building that would be expected to last as long as the new equipment installed therein. The construction of a new building would not result in any new significant and unavoidable environmental impacts and was seen to reduce long term maintenance in a building, designed specifically for the new equipment that reduced life-cycle costs over the long term. This added value met the District's goal of ensuring efficient wastewater treatment facilities for the long term. X. Adoption of Mitigation Monitoring and Reporting Program Public Resources Code Section 21081.6 requires a public agency making findings required by subdivision (a) of Section 21081 to adopt a reporting and monitoring program for the changes to the Project which it has adopted or made a condition of Project approval in order to mitigate or avoid significant effects on the environment. The Board hereby adopts the MMRP. The Board further finds that said program meets the requirements of Public Resources Code Section 21081.6 by ensuring compliance during project implementation of the mitigation measures identified in the Final SEIR. The MMRP is attached to these findings as Attachment C. OCSD P2-92 Sludge Dewatering and Odor Control Project 19 ESA/211260 912189.1 Attachment B Statement of Overriding Considerations 912185.1 1. Attachment B a. Statement of Overriding Considerations CEQA requires that the decision makers balance the benefits of a proposed project against its unavoidable environmental risks in determining whether to approve the project (Public Resources Code §21081(b); 14 CCR §§15043, 15093(a)). As documented in the Draft SEIR and explained in the Findings of Fact for the Project, the Project will potentially result in significant and unavoidable impacts in the following environmental areas: • Cumulative air emissions during operational activities; • Temporary ambient noise impacts during construction activities. The Project provides substantial benefits for OCSD's collection, treatment, disposal, and wastewater recycling processes and facilities. In 1999, OCSD adopted the OCSD Master Plan (Strategic Plan) and the Strategic Plan Program EIR (1999 PEIR). The purpose of the Strategic Plan was to identify projects needed to accommodate projected population growth through 2020 in the service area and to comply with changing future regulations that affect treatment facilities and effluent quality. The certified 1999 PEIR proposed to rebuild 15 belt filter press dewatering facilities and refurbish three 80-foot diameter digesters and three holding tanks at Treatment Plant 2. In 2005, OCSD certified a Secondary Treatment and Plant Improvement Project EIR, which overhauled proposed upgrades to OCSD's secondary treatment capacity to meet secondary treatment standards. The P2-92 facility was planned to upgrade the biosolids handling facilities by replacing existing belt filter presses with centrifuges. The Project is similar to the P2-92 facility described in the 2005 EIR, except that the current Project proposes to build two new buildings, rather than update the existing facilities. The new facility would replace the old facility, performing the same function with newer equipment. The replacement equipment would not increase the capacity of the plant. The Project would replace an existing process with newer more energy efficient technology. In addition, the current dewatering building is an open environment where fugitive emissions can escape into the atmosphere. The overall emissions from the Project would be reduced because the more efficient technology would be operating in a closed environment where emissions are captured and treated prior to discharge. In addition, implementation of the Project would result in approximately 130 fewer biosolids truck haul trips per month. There are currently approximately 466 biosolids truck trips per month at Plant 2; the Project would result in approximately 336 biosolids truck trips per month at Plant 2. As a result, the project would reduce monthly mobile source emissions at Plant 2. This Board has balanced the Project's benefits against the Project's significant unavoidable impacts on operational cumulative air emissions and construction-related ambient noise impacts. The Board finds that the Project's benefits outweigh the Project's significant unavoidable impacts. Therefore, the Project's significant unavoidable impacts OCSD P2-92 Sludge Dewatering and Odor Control Project 1 ESA/211260 912185.1 Attachment B:Statement of Overriding Considerations are acceptable in light of the Project's benefits. The Board finds that each of the following benefits is an overriding consideration, independent of the other benefits, that warrants approval of the Project notwithstanding the Project's significant and unavoidable impacts: 1. The new sludge dewatering building and odor control facility replaces the existing aging sludge dewatering system and odor control system that were installed over 25 years ago and have reached the end of their service life. 2. Newer equipment and technology will be more energy efficient and would be operating in a closed environment where emissions will be captured and treated prior to discharge. 3. A significant net reduction in overall biosolids truck trips (mobile emissions) compared to estimates in the 1999 PEIR as drier biosolids cake material will require fewer biosolids truck deliveries, which will also reduce biosolids management costs. 4. Improvement in odor control and reduction in fence line odor impacts as the new odor control system would control odor from the proposed new enclosed dewatering building and from the existing truck loading facility. OCSD P2-92 Sludge Dewatering and Odor Control Project 2, ESA/211260 912185.1 Attachment C Mitigation Monitoring and Reporting Program 912186.1 MITIGATION MONITORING AND REPORTING PROGRAM Orange County Sanitation District P2-92 Sludge Dewatering and Odor Control Project Introduction In accordance with Section 15091(d) and Section 15097 of the CEQA Guidelines, which require a public agency to adopt a program for reporting on or monitoring required changes in the project or conditions of approval to substantially lessen or avoid significant environmental effects, the Mitigation Monitoring and Reporting Program is hereby adopted for this project. This Mitigation Monitoring and Reporting Program (MMRP) summarizes the mitigation commitments identified in the P2-92 Sludge Dewatering and Odor Control Project Final Subsequent EIR (State Clearinghouse No. 2004031076). Mitigation measures are presented in the same order as they occur in the Final SEIR. The columns in the MMRP table provide the following information: • Mitigation Measure(s): The action(s) that will be taken to reduce the impact to a less-than-significant level. • Implementation, Monitoring, and Reporting Action: The appropriate steps to implement and document compliance with the mitigation measures. • Responsibility: The agency or private entity responsible for ensuring implementation of the mitigation measure. However, until the mitigation measures are completed, the Orange County Sanitation District (Sanitation District), as the CEQA Lead Agency, remains responsible for ensuring that implementation of the mitigation measures occur in accordance with the MMRP (CEQA Guidelines, Section 15097(a)). • Monitoring Schedule: The general schedule for conducting each monitoring task, either prior to construction, during construction and/or after construction OCSD P2-92 Sludge Dewatering and Odor Control Project 1 ESA/211260 912186.1 MITIGATION MONITORING AND REPORTING PROGRAM OCSD P2-92 SLUDGE DEWATERING AND ODOR CONTROL PROJECT COMPONENT Implementation, Monitoring, and Reporting Monitoring Mitigation Measures Action Responsibility Schedule Aesthetics None Required. Air Quality From the 1999 PEIR MMRP Mitigation Measure 6.5-1a: General contractors should maintain equipment engines • Include mitigation measure in construction OCSD;Construction Contractor During Construction in proper tune and operate construction equipment so as to minimize exhaust contractor specifications. emissions.Such equipment shall not be operated during second state smog alerts. 0 Maintain records of specifications in project file. Mitigation Measure 6.5-1b: During construction, trucks and vehicles in loading or • Include mitigation measure in construction OCSD;Construction Contractor During Construction unloading queues should be kept with their engines off, when not in use, to reduce contractor specifications. vehicle emissions. Construction activities shall be phased and scheduled to avoid . Maintain records of specifications in project file. emissions peaks,and discontinued during second-state smog alerts. Mitigation Measure 6.5-3a: OCSD will maintain its ride-share programs to reduce • Include mitigation measure in project design OCSD During Construction commuter traffic and air quality impacts. specifications. • Maintain records of specifications in project file. Mitigation Measure 6.5-3b: OCSD will complete the implementation of compressed 0 Include mitigation measure in project design OCSD;Construction Contractor During Construction natural gas (CNG) stations and encourage contractors to employ CNG-powered specifications. engines on residual solids haul trucks through contract incentives where possible. Include mitigation measure in construction contractor specifications. • Maintain records of specifications in project file. Mitigation Measure 6.5-3c:Alternative fuels should be considered for biosolids haul Include mitigation measure in construction OCSD;Construction Contractor Prior to and During trucks including low NOx emitters. contractor specifications. Construction • Maintain records of specifications in project file. Mitigation Measure 6.5-3d:OCSD should initiate research on alternative methods of Maintain records of specifications in project file. OCSD Ongoing OCSD transporting biosolids to land application sites including electric vehicles and rail. measure Mitigation Measure 6.5-2a: OCSD will research and implement ways of reducing Maintain records of specifications in project file. OCSD Ongoing OCSD NOx and air toxics emissions from stationary sources, including non-combustion measure sources to meet future emission reductions that will be imposed by the SCAQMD. Mitigation Measure 6.5-2b: OCSD will comply with existing and future air quality Include mitigation measure in project design OCSD Ongoing OCSD regulations including SCAQMD Rules and permit requirements. As air quality specifications. measure regulations become more restrictive in the South Coast Air Basin coinciding with Include mitigation measure in construction increased operational demand, OCSD will be required to reduce emissions through contractor specifications. process modifications or by implementing new control technologies. Maintain records of specifications in project file. OCSD P2-92 Sludge Dewatering and Odor Control Project 2 ESA/211260 912186.1 MITIGATION MONITORING AND REPORTING PROGRAM OCSD P2-92 SLUDGE DEWATERING AND ODOR CONTROL PROJECT COMPONENT Implementation, Monitoring, and Reporting Monitoring Mitigation Measures Action Responsibility Schedule Mitigation Measure 6.5-5a: OCSD will evaluate the need for odor control equipment • Include mitigation measure in project design OCSD Prior to and After for future facilities to reduce fugitive foul odors and include odor control when specifications. Construction necessary. OCSD will also periodically review air emissions from existing facilities to . Maintain records of specifications in project file. determine if odor control is necessary. Mitigation Measure 6.5-5b: When dewatering is required during excavation, OCSD • Include mitigation measure in project design OCSD During Construction shall provide odor control systems to reduce construction odor impacts when specifications. necessary. 0 Maintain records of specifications in project file Project Specific Mitigation Measure Mitigation Measure 4.2-1: OCSD shall incentivize the use of newer biosolids haul Include as part of the evaluation criteria on the OCSD During Operation trucks through awarding points to haul contract bidders that commit to using 2010 or next biosolids hauling contracts. newer fleets. Mitigation Measure 4.2-2: During demolition of the existing sludge dewatering and 0 Include mitigation measure in project design OCSD;Construction Contractor During Construction odor control facility at Plant 2, OCSD shall ensure that contractors remove all specifications. odorous demolished equipment from the Plant 2 property to minimize potential odors . Include mitigation measure in construction on nearby sensitive receptors. Staging areas shall not be used to store odorous contractor specifications. demolished equipment. If equipment is to be salvaged and may contain odorous . Maintain records of specifications in project file. material, this equipment shall be covered to contain the odors from leaving the fenceline until the equipment is cleaned and odorous materials removed. Mitigation Measure 4.2-3: Prior to construction of the new sludge dewatering and 9 Prepare an odor study that includes odor OCSD Prior to Construction odor control facility at Plant 2, OCSD shall prepare an odor study to be conducted modeling of the new odor control system to that entails odor modeling of the new odor control system to ensure that odors ensure odors emitted from the facility would be emitted from the facility would minimized to the maximum extent feasible. minimized to the maximum extent feasible • Retain copies of the odor study and results in the project file Biological Resources None Required. Cultural Resources From the 1999 PEIR MMRP Measure 7.10-2c: In the event of accidental discovery or recognition of any human 9 Include mitigation measure in construction OCSD;Construction Contractor During Construction remains, the County Coroner would be notified immediately and construction contractor specifications. activities shall be halted. If the remains are found to be Native American,the Native . Retain records of all inadvertent discovery American Heritage Commission would be notified within 24 hours. Guidelines of the evaluations in the project file. Native American Heritage Commission shall be adhered to in the treatment and disposition of the remains. Geology,Soils,and Seismicity From the 1999 PEIR MMRP OCSD P2-92 Sludge Dewatering and Odor Control Project 3 ESA/211260 912186.1 MITIGATION MONITORING AND REPORTING PROGRAM OCSD P2-92 SLUDGE DEWATERING AND ODOR CONTROL PROJECT COMPONENT Implementation, Monitoring, and Reporting Monitoring Mitigation Measures Action Responsibility Schedule Measure 6.6-1b: OCSD will design and construct new facilities in accordance with 0 Maintain records of specifications in project file. OCSD Ongoing OCSD OCSD's seismic standards and/or meet or exceed seismic, design standards in the measure most recent edition of the CBC. Measure 6.6-1a: Geotechnical Evaluations. During the project design phase for all 0 Incorporate recommendations of the OCSD Prior to Construction facilities, OCSD will perform design-level geotechnical evaluations. The geotechnical geotechnical report into the design and evaluations will include subsurface exploration and review of seismic design criteria construction of proposed facilities. to ensure that design of the facilities meet seismic safety requirements of the UBC. 0 Retain geotechnical evaluation reports in the Site-specific testing for soils susceptible to liquefaction shall be conducted. If testing project file. results indicates that conditions are present that could result in significant liquefaction and damage to project facilities,appropriate feasible measures will be developed and incorporated into the project design. The performance standard to be used in the geotechnical evaluations for mitigating liquefaction hazards will be minimization of the hazards. Measures to minimize significant liquefaction hazards could include the following: • Densification or dewatering of surface or subsurface soils. • Construction of pile or pier foundations to support pipelines and/or buildings. • Removal of material that could undergo liquefaction in the event of an earthquake and replacement with stable material. Recommendations of the geotechnical report will be incorporated into the design and construction of proposed facilities. Greenhouse Gas Emission None Required. Hazards and Hazardous Materials Proiect Specific Mitigation Measure Mitigation Measure 4.4-1: During construction, OCSD shall implement BMPs for the • Include mitigation measure in construction OCSD;Construction Contractor During Construction handling and storage of hazardous materials. Implementation of the BMPs shall contractor specifications. minimize adverse affects to the surrounding vicinity,and will include: 0 Retain a qualified construction monitor to • Implementation of applicable BMPS as identified in the OCSD Stormwater conduct routine inspections of mitigation Onsite Management Plan; implementation during project construction. • Adherence to manufacturer's recommendations and regulatory requirements for ' Retain construction monitoring reports in project use,storage,and disposal of hazardous materials,and; file. • Proper disposal of fuels and other chemicals and hazardous materials. Maintenance and operation records shall be retained in the project file. Mitigation Measure 4.4-2: Prior to construction, OCSD shall prepare and complete • Prepare asbestos, lead, and PCB survey of the OCSD Prior to Construction asbestos, lead, and PCB surveys of the facilities to be demolished. facilities to be demolished. Recommendations and procedures shall be described for the removal, handling, and . Include mitigation measure in construction disposal of these hazardous materials and associated elements. OCSD shall require contractor specifications. OCSD P2-92 Sludge Dewatering and Odor Control Project 4 ESA/211260 912186.1 MITIGATION MONITORING AND REPORTING PROGRAM OCSD P2-92 SLUDGE DEWATERING AND ODOR CONTROL PROJECT COMPONENT Implementation, Monitoring, and Reporting Monitoring Mitigation Measures Action Responsibility Schedule the contractor performing the asbestos removal and/or demolition project to comply . Submit the Asbestos-Demolition Notification with Air Quality Management District Rule 403, to prevent asbestos emissions from Form to the South Coast Air Quality emanating during building renovation and demolition activities.The contractor Management District at least 14 days prior to performing the asbestos removal and/or demolition project shall submit the Asbestos- demolition activities. Demolition Notification Form to the South Coast Air Quality Management District at . Retain asbestos, lead, and PCV survey in the least 14 days prior to demolition activities. project file. • Retain Asbestos-Demolition Notification Form in the project file. Hydrology and Water Quality From the 1999 PEIR MMRP Measure 6.7-1a: OCSD will implement Best Management Practices (BMPs) as • Include mitigation measure in construction OCSD During Construction outlined in the On-Site Stormwater Management Plan(OSSWMP). contractor specifications. . Maintenance and operation records shall be retained in the project file. Measure 6.7-1b: OCSD will train construction and operation employees in storm • Include mitigation measure in construction OCSD Prior to and During water pollution prevention practices. Individual contractors performing construction at contractor specifications. Construction each treatment facility shall be required to comply with provisions of the OSSWMP. Retain records of the compliance and implementation in the project file. Measure 6.7-1c: OCSD will inspect and maintain all on-site storm water drains and Retain records of the compliance and OCSD Ongoing Measure catch basins on plant property regularly. implementation in the project file. Measure 6.7-1d: OCSD will apply the Santa Ana RWQCB's recommended BMPs • Retain records of the compliance and OCSD During Construction, during construction and operation as specified in the OSSWMP. implementation in the project file. Operation Measure 6.7-1e: For construction involving disturbance greater than one acre of • Include mitigation measure in construction OCSD During Construction land,OCSD will incorporate into contract specifications the following requirements: contractor specifications. . The contractor(s) will comply with the RWQCB requirements of the NPDES • Retain records of the compliance and General Permit for Discharges of Storm Water Associated with Construction implementation in the project file. Activity.The contractor will implement control measures that are consistent with the General Permit and with the recommendations and policies of the RWQCB. This would include submitting a Notice of Intent and site map to the RWQCB, developing a Storm Water Pollution Prevention Plan, and implementing site- specific BMPs to prevent sedimentation to surface waters. Measure 6.7-2a: Construction contractors will comply with OCSD's Dewatering 0 Include mitigation measure in construction OCSD During Construction Specifications. contractor specifications. • Retain records of the compliance and implementation in the project file. Measure 6.7-2b: Water from dewatering operations will be disposed of in a suitable • Retain records of the compliance and OCSD During Construction manner in conformance with a NPDES permit,as approved by the RWQCB. implementation in the project file. and Operation OCSD P2-92 Sludge Dewatering and Odor Control Project 5 ESA/211260 912186.1 MITIGATION MONITORING AND REPORTING PROGRAM OCSD P2-92 SLUDGE DEWATERING AND ODOR CONTROL PROJECT COMPONENT Implementation, Monitoring, and Reporting Monitoring Mitigation Measures Action Responsibility Schedule Land Use and Planning None Required. Mineral Resources None Required. Noise From the 1999 PEIR MMRP Mitigation Measure 6.4-1a: Construction activities shall be limited to between the • Include mitigation measure in construction OCSD;Construction Contractor During Construction hours of 7:30 a.m. and 5:30 p.m. and as necessary to comply with local ordinances. contractor specifications. Any nighttime or weekend construction activities would be subject to local permitting. 0 Retain records of implementation in the project file Mitigation Measure 6.4-1b:All equipment used during construction shall be muffled 9 Include mitigation measure in construction OCSD;Construction Contractor During Construction and maintained in good operating condition. All internal combustion engine driven contractor specifications. equipment shall be fitted with intake and exhaust mufflers that are in good condition. 0 Retain records of implementation in the project file. Mitigation Measure 6.4-1c: OCSD shall hire an acoustical engineer to evaluate • Retain an acoustical engineer to implement OCSD During Construction other alternatives for mitigating impacts from extensive pile driving activities. Mitigation Measure 6.4-1c. Retain records of the construction noise survey in project files. Mitigation Measure 6.4-1d: OCSD shall employ alternative foundation designs to • Include mitigation measure in project design OCSD Prior to avoid a need for pilings,or use cast-in-place pilings constructed in boreholes. specifications. Construction • Include mitigation measure in construction contractor specifications. • Retain records of implementation in the project file. Mitigation Measure 6.4-1e: Nearby sensitive receptors affected by construction shall 0 Include mitigation measure in construction OCSD;Construction Contractor During Construction be notified concerning the project timing and construction schedule, and shall be contractor specifications. provided with a phone number to call with questions or complaints. 0 During construction, OCSD or the construction contractor shall provide information on the project and include a phone number to call with questions or complaints. Retain implementation records in the project file, including any complaints and resolution of complaints. OCSD P2-92 Sludge Dewatering and Odor Control Project 6 ESA/211260 912186.1 MITIGATION MONITORING AND REPORTING PROGRAM OCSD P2-92 SLUDGE DEWATERING AND ODOR CONTROL PROJECT COMPONENT Implementation, Monitoring, and Reporting Monitoring Mitigation Measures Action Responsibility Schedule Proiect Specific Mitigation Measure Mitigation Measure 4.5-1: Stationary construction equipment that generate noise or • Include mitigation measure in construction OCSD;Construction Contractor During Construction vibration(e.g.,compressors,generators,cement mixing,general truck idling)shall be contractor specifications. placed on the construction site as far as possible from the nearest residential land . Retain records of implementation in the project uses. file Mitigation Measure 4.5-2: Sound dampening devices shall be placed around or • Include mitigation measure in construction OCSD;Construction Contractor During Construction adjacent to pile driving activities to minimize noise impacts to the surrounding contractor specifications. community. Retain records of implementation in the project file Population and Housing None Required. Public Services None Required. Recreation None Required. Transportation and Traffic Proiect Specific Mitigation Measure Mitigation Measure 4.6-1: Prior to construction, the construction contractor shall • Include mitigation measure in construction OCSD;Construction Contractor Prior to Construction complete and submit for review and comment a detailed construction schedule to contractor specifications. OCSD. The contractor will be required to comply with the schedule and plan to . The construction contractor shall submit a minimize truck traffic on arterial highways during peak periods and to reduce their detailed construction schedule to OCSD for impediment on street construction. review. . Retain records of the construction schedule in the project files. . Retain implementation records in the project file. Utilities and Energy None Required. OCSD P2-92 Sludge Dewatering and Odor Control Project 7 ESA/211260 912186.1