Attachment A
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ATTACHMENT A PROJECT MANAGEMENT (358) 6~20l0 FACILITIES OPERATIONS IB5&1 CQ.4..JC10 S::LEET UANAGEUEJU John J. McTighe tltS&\ &g.&...2176 Director REAL ESTATE SERVICF.S DEPARTMENT OF GENERAL SERVICES UlAAl GQ.t.2291 DOr:.UMENf SERVIC':F.S 5555 OVERLAND AVENUE, SAN DIEGO, CA 92123-1294 l&...r,.&\lQS.SU6 MITIGATED NEGATIVE DECLARATION Project Name: Bonita/Sunnyside Branch Library Project Number(s): KL9540 This Document is Considered Draft Until it is Adopted by the Appropriate County of San Diego Decision-Making Body. This Mitigated Negative Declaration is comprised of this form along with the Environmental Initial Study that includes the following: a. Initial Study Form d. Traffic Study for the Proposed Project e. Vernal Pool/Wetland Assessment and Wetland Delineation f. Cultural Resources Report g. Soils Study h. Flood Analysis 1. California Environmental Quality Act Mitigated Negative Declaration Findings: Find, that this Mitigated Negative Declaration reflects the decision-making body's independent judgement and analysis; and, that the decision-making body has reviewed and considered the information contained in this Mitigated Negative Declaration and the comments received during the public review period; and that revisions in the project plans or proposals made by or agreed to by the project applicant would avoid the effects or mitigate the effects to a point where clearly no significant effects would occur; and, on the basis of the whole record before the decision-making body (including this Mitigated Negative Declaration) that there is no substantial evidence that the project as revised will have a significant effect on the environment. 2. Required Mitigation Measures: a. Anticipated impacts to 680 square feet of isolated, low value wetlands south of an existing headwall would be mitigated through wetlands restoration with an increase of the on-site wetlands by 344 square feet (from 2,780 SF to 3, 124 SF). Native wetland species present at the site and in the nearby Sweetwater River will be utilized for revegetation within the wetlands area, and indigenous native upland species will be utilized within the wetlands buffer zone. Specific planting and design details will be specified to the satisfaction of California Department of Fish and Game prior to issuance of a Streambed Alteration Agreement for disturbance of the wetland. The County will be responsible for maintenance and monitoring of the wetland area until the mitigation success criteria have been met to the satisfaction of the California Department of Fish and Game, and the Regional Water Quality Control Board. b. Potential cultural resource impacts due to construction disturbance of on site soils shall be mitigated through construction monitoring by a qualified archaeological monitor following County-approved procedures and standards. Monitoring shall be implemented to the satisfaction of the County Department of General Services. c. Haul trucks used to transport fill soils to the site will only be allowed to enter or leave the site between the hours of 9:00 a.m. to 3:00 p.m. This provision shall be monitored and enforced by County personnel. 3. Critical Project Design Elements That Must Become Conditions of Approval: The following project design elements were either proposed in the project application or the result of compliance with specific environmental laws and regulations and were essential in reaching the conclusions within the attached Environmental Initial Study. While the following are not technically mitigation measures, their implementation must be assured to avoid potentially significant environmental effects. a. improvement of library site parking areas to County standards for rural areas; b. structural design and engineering in compliance with County building regulations; c. compliance with applicable County and City regulations regarding grading and erosion prevention; d. compliance with applicable County regulations protecting drainage courses; e. compliance with County and City standards and procedures designed to implement the Regional Water Quality Control Board's Basin Plan, Surface and Groundwater Objectives; f. Installation of any exterior library lighting consistent with County and City of Chula Vista lighting regulations. g. Installation of parapet noise barriers around HVAC equipment to reduce peak HVAC noise levels to 60 dBA or less at the nearest residential property boundary h. The site shall be graded and maintained such that surface drainage is directed away from structures, and into the existing drainage swale at the west side of the site (to be expanded and improved). Prior to construction/ grading of the site, a Notice of Intent (NOi) must be filed with the State Water Resources Control Board (SWRCB) for a General Construction Storm Water Permit. Once construction is complete, the site owner and/or facility operator is required to investigate coverage under the General Industrial Storm Water Permit by contacting the SDRWQCB at 619-467- 2952. In addition, if future uses allowed under the General Impact Industrial Use Regulations (M54) involve contaminates and/or the planned discharge of waste to waters of the State or ground/soil, a permit may be required by the SDRWQCB. i. Prior to opening the library, the County will relocate the site access to Bonita Road, so that it lines up with the existing access to the shopping center south of Bonita Road. The County will also close the existing Bonita Road access to the golf course parking lot. Concurrently, the City of Chula Vista will install a traffic signal at the new intersection, to be in place prior to opening of the library for public use. j. If any site contamination is discovered at the site during the process of preconstruction inspection, the County Department of General Services will follow standard project procedures, as follows. 1) conduct special testing of the site to determine the nature and extent of the potential contamination; 2) if such contamination is documented, request that the County Department of Environmental Health (DEH) identify and describe appropriate protocols to be followed; 3) incorporate the protocols developed by DEH into project construction documents; and 4) have DEH provide oversight for any remediation efforts. 4. Results of Public Review ( ) No Comments were received during the public input period. ( Comments were received but did not address the draft Negative Declaration finding or the accuracy/completeness of the Initial Study. No response is necessary. The letters are attached. ( X ) Comments addressing the findings of the draft Negative Declaration and/or accuracy/completeness of the Initial Study were received during the public input period. The letters and responses follow. RESPONSE TO COMMENT LETTER FROM MARY ANN MANN, SWEETWATER AUTHORITY, DATED NOVEMBER 5, 2003 (See Attached Letter Following MND) In response to comment on Section V.2, the statement in the Initial Study that the Sweetwater hydrologic subarea is impaired for Coliform bacteria and metals is incorrect, and has been deleted. This change does not result in any change in anticipated impacts. In response to comment on Section V.4, we could not find the statement that "the project site is not located within an aquifer." We agree that the site is located above an aquifer in the La Nacion hydrologic subarea, used for municipal, domestic, agricultural and industrial purposes. Therefore, no change to the Initial Study is required. In response to comment on Section V.6, the current site condition includes unimproved land that produces a peak discharge of approximately 3.0 cubic feet per second of runoff in the ten year storm. Development of the site with building, parking lots and impervious surfaces increases the peak discharge in the similar ten-year storm to approximately 5.8 cubic feet per second. The estimated increase in the rate of discharge is insignificant compared to the total peak discharge of the overall drainage basin. The peak basin discharge of the inclusive Sweetwater River basin is more than 20,000 cubic feet per second. The project design incorporates site design, source control, and structural treatment Best Management Practices (BMP's) in compliance with local and regional requirements. Site design BMP's include the utilization of landscape and natural areas for the discharge of surface drainage and the reduction of impervious surfaces to the extent possible. Source Control BMP's include the control of hazardous material storage, the limitation of the use of fertilizers and pesticides, the design of controlled trash enclosures, the installation of efficient landscape irrigation systems, catch basin stenciling, and good site housekeeping and maintenance. Structural treatment BMP's include catch basin filter inserts, site maintenance, natural bio-filters and swales, and construction phase best management practices. Implementation of these BMP's would reduce the potential for site discharge or urban runoff impacting water quality downstream. In response to comment on Section V.11, site development will include elevating the proposed buildings to an elevation approximately one foot above the 100-year flood level of the adjacent Sweetwater River. The proposed building pads have an elevation of 75.7 and 75.9 feet above mean sea level (AMSL). The Sweetwater Dam inundation area would have an elevation of approximately 76 feet ASML at the project site. Furthermore, finish floor elevations would be at 76.20 and 76.45 feet ASML. Therefore, no significant impacts associated with flooding are anticipated at the site. In response to comment on Section XII, the proposed site plan requires potable water service for fire protection, domestic, and landscape uses. Currently properties on the east and west of the site are serviced from existing water mains in Otay Lakes Road and Bonita Road. The existing commercial center directly south of the site on the southerly side of Bonita Road is served by an existing water main connecting Otay Lakes Road to the main in Bonita Road. The installation of a new water main in Bonita Road easterly of the required point of service for the site is unnecessary.