Orange County Water District Water Production Enhancement Project
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Orange County Water District Water Production Enhancement Project Final Initial Study/Mitigated Negative Declaration Mitigation Monitoring Program State Clearinghouse No. 20160811067 Prepared By Orange County Water District 18700 Ward Street Fountain Valley, CA 92708 Contact: Daniel Bott October 2016 Table of Contents SECTION PAGE SECTION 1.0 INTRODUCTION................................................................................ 1-1 SECTION 2.0 PROJECT DESCRIPTION ................................................................. 2-1 SECTION 3.0 DEVELOPMENT OF MITIGATION MONITORING REPORTING PROGRAM ........................................................................................ 3-1 SECTION 4.0 REQUIREMENT TO APPROVE AND IMPLEMENT MITIGATION MONITORING PLAN ......................................................................... 4-1 TABLE Table 1: Water Production Enhancement Project Mitigation Monitoring Program ........ 4-2 OCWD Water Production Enhancement Project Final ISMND Mitigation Monitoring Program i Section 1 SECTION 1.0 INTRODUCTION The following is a Mitigation Monitoring Report Program (MMP) for the Orange County Water District Water Production Enhancement Project Final Initial Study/Mitigated Negative Declaration (IS/MND) prepared pursuant to Section 15097 of the CEQA Guidelines and Section 21081.6 of the Public Resources Code. This MMP lists all applicable mitigation measures from the Draft IS/MND for the Orange County Water District Water Production Enhancement Project IS/MND. The appropriate timing of implementation and responsible party are identified to ensure proper enforcement of the mitigation measures from the Draft IS/MND. OCWD Water Production Enhancement Project Final ISMND Mitigation Monitoring Program 1-1 Section 2 SECTION 2.0 PROJECT DESCRIPTION Proposed Project The proposed project involves the construction and operation of a flow equalization tank and pump station on the Orange County Sanitation District Plant No. 2 wastewater treatment facility site. The secondary effluent from the flow equalization tank would provide an additional 6,000 acre-feet per year of secondary effluent for treatment at the Orange County Water District Groundwater Replenishment System (GWRS) advanced recycled water treatment facility, increasing the GWRS total full build-out treatment capacity to 134,000 acre feet per year. Project Purpose The OCWD Water Production Enhancement Project consists of a secondary effluent flow equalization tank proposed at OCSD’s Plant No. 2 in order to receive maximum water production at the OCWD GWRS water treatment facility. OCSD’s Plant No. 2 is a wastewater treatment facility which has varying influent (and effluent) flows of secondary effluent. During the day, wastewater flows into OCSD’s Plant No. 2 can peak above 140 million gallons per day (MGD). These peak flows cannot be pumped to the GWRS facility due to the limits of the conveyance facilities, i.e. effluent pump station and pipeline; that deliver the secondary effluent to GWRS. Therefore, a secondary effluent flow equalization tank has been proposed at OCSD’s Plant No. 2 Site to capture these peak flows during the day and store them in the 6-million gallon tank until nighttime. During low flows at night, the flow equalization tank would drain into the effluent pump station to supplement the low secondary effluent inflows and allow the GWRS to treat these peak flows which would have otherwise been discharged to the ocean. The Water Production Enhancement Project involves three construction activities: 1) construction of flow equalization tank, 2) construction of a pump station, and 3) construction of conveyance piping and flow meter vault. Project Location The OCSD Plant No. 2 Site is located at 22212 Brookhurst Street within the City of Huntington Beach. OCSD Plant No. 2 site is composed of 110 acres, and is developed with wastewater treatment structures, offices, and paved parking areas and roadways. The site is bounded by Hamilton Avenue to the north, Brookhurst Street to the west, Talbert Marsh and Talbert Marsh Bike Trail to the south and the Santa Ana River and the Santa Ana River Trail to the east. Primary regional access to Plant No. 2 would from Interstate 405 from the Brookhurst Street exit. Primary local access would be from Brookhurst Street and Pacific Coast Highway. OCWD Water Production Enhancement Project Final ISMND Mitigation Monitoring Program 2-1 Section 3 SECTION 3.0 DEVELOPMENT OF MITIGATION MONITORING REPORTING PROGRAM The basic elements of the Mitigation Monitoring Program are the mitigation measures identified by each impact category addressed in the Draft IS/MND. The development of the program was based on the following procedures necessary to initiate and complete the monitoring process. Identification of the key periods and events in the project implementation schedule. Identification of the key personnel and agencies responsible for environmental monitoring. Monitoring of the implementation of the mitigation measures and documentation that the measures have been properly and thoroughly implemented. Development of the written document on the implementation of all the mitigation measures, identification of any areas of non-compliance, and proposed activities to bring the project into compliance with the mitigation monitoring and reporting program. OCWD Water Production Enhancement Project Final ISMND Mitigation Monitoring Program 3-1 Section 4 SECTION 4.0 REQUIREMENT TO APPROVE AND IMPLEMENT MITIGATION MONITORING PLAN The OCWD has the authority to require and enforce the provisions of California Resource Code Section 21081.6. The OCWD will be responsible for approving the Mitigation Monitoring Program and for preparing the written report documenting the implementation of project mitigation measures. Table 1 summarizes the mitigation measures that have been adopted for the Project, specifies the timing for implementation of each measure and identifies the responsible parties for ensuring implementation and the satisfactory completion of each measure. The procedures for implementing the Mitigation Monitoring Program are: Monitoring Procedures 1. An Environmental Monitor, appointed by OCWD, will be responsible for coordinating review of project plans and activities, the construction site, and/or operations to ensure that the mitigation measures are properly and thoroughly implemented through the course of the project. 2. Written documentation that each mitigation measure in Table 1 has been implemented will be prepared. This documentation can be on an OCWD mitigation monitoring checklist or a similar form that clearly indicates the timing or schedule for implementation, whether the measure has, in fact, been implemented, or in the case of measures that are ongoing, that a process has been developed to ensure continued implementation of the measure. Reporting Procedures 1. The Environmental Monitor appointed by OCWD on this project will be responsible for periodically reviewing the program in Table 1 with the OCWD Environmental Compliance Advisor. 2. The Environmental Monitor will prepare a written report for the OCWD documenting the completion of the implementation of all the mitigation measures. For those measures not implemented or for activities that do not fully comply with mitigation measures included in Table 1, an explanation of the areas of noncompliance will be prepared, including a proposal to bring those elements of the project into compliance with the Mitigation Monitoring Program. OCWD Water Production Enhancement Project Final ISMND Mitigation Monitoring Program 4-1 Section 4 Table 1: Water Production Enhancement Project Mitigation Monitoring Program Mitigation Measure Responsible for Monitoring Verification Implementation Aesthetics OCWD During A-1: All onsite lighting shall be directed Construction away from adjacent residential, business uses and away from the Santa Ana River right-of-way. OCWD During A-2: During operation of the project the Operation onsite lighting creates a light or glare issues for sensitive receptor properties, OCWD will implement corrective measures to resolve the issue. Such corrective measures may include providing additional shielding on light fixtures, relocating lighting fixtures and reducing the intensity of lighting. Cultural Resources OCWD During CR-1: Prior to earth moving activities, a Construction qualified archaeologist meeting the Secretary of the Interior’s Professional Qualifications Standards for archaeology (U.S. Department of the Interior, 2008) will conduct cultural resources sensitivity training for all construction personnel. Construction personnel shall be informed of the types of cultural resources that may be encountered, and of the proper procedures to be enacted in the event of an inadvertent discovery of archaeological resources or human remains. OCWD will ensure that construction personnel are made available for and attend the training and retain documentation demonstrating attendance. OCWD During CR-2: Prior to the start of any ground- Construction disturbing activities, OCWD will retain an archaeological monitor to observe all ground-disturbing activities. Archaeological monitoring will be conducted by a monitor familiar with the types of archaeological resources that could be encountered and shall work under the direct supervision of the qualified archaeologist. Monitoring may be reduced or discontinued by the qualified archaeologist, in coordination with OCWD, based on observations of subsurface soil stratigraphy