ARCHIVED REPORTS_DRAFT ENVIRONMENTAL IMPACT REPORT

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environmental effects as air quality degradation attributable to dust from cultivation and emissions from farm equipment, as well as water quality degradation from runoff of irrigation water containing traces of pesticides. According to U.S. Census records,the population in Manteca grew from around 40,800 in 1990 to more than 49,200 in 2000 (U.S. Census Bureau 1990,2000a). This increase in population has come as a result of moderate urbanization over the decade,particularly the development of single-family residences and commercial and office buildings.Urbanization has also resulted in increased traffic,particularly on increasingly crowded local roadways, increased air pollution from vehicles and construction, and loss of farmland. Even with this growth,however, Manteca accounted for only 9%of the total San Joaquin County population in the year 2000(approximately 563,600 persons). San Joaquin County has grown substantially in recent years,particularly in the cities of Tracy and Stockton. Between 1990 and 2000, Tracy grew by more than 23,000 residents and Stockton grew by 33,000 residents. Together,these two cities represent 69%of the County's population gain between 1990 and 2000. In comparison, Manteca's growth equaled 10%of the total County population gain. Growth in Tracy and Stockton has resulted in environmental changes similar to those occurring in Manteca,although at more pronounced levels than in Manteca. The County is addressing numerous regional issues pertaining to severe air quality degradation,traffic congestion,biological habitat loss, loss of farmland,and other urban-related environmental changes. The water quality of the lower San Joaquin River drainage and the Sacramento-San Joaquin Delta has been heavily affected by human activities. Land use in the Sacramento-San Joaquin Delta is dominated by agriculture (about 538,000 acres),while urban and commercial property account for approximately 64,000 acres of developed land. The use of pesticides and fertilizers has altered water quality,with pesticides sometimes reaching levels acutely toxic to sensitive invertebrates. Agriculture and urban/stormwater runoff are the predominant sources of contaminants in the San Joaquin Basin. Agricultural return flows sometimes contain high concentrations of dissolved solids(i.e. salinity) and trace elements that can degrade water quality. Watersheds that feed the river and Delta contribute pollutants and stressors that produce or exacerbate water quality problems. In addition, construction of the Stockton Deep Water Channel and channeling of the San Joaquin River system have created an area of reduced dissolved oxygen near Stockton. 5.2.2 LIST OF RELATED LOCAL PROJECTS The list of past,present, and probable future local projects used for this cumulative analysis includes those projects that have occurred or are planned to occur within the City. For the purposes of this discussion,the projects that may have a cumulative effect on the resources in the project area will often be referred to as the "related projects."Related projects are identified in Table 5-1 and Exhibit 5-1;the numbering corresponds to the numbers used in the exhibit and table. Table 5-1 Related Cumulative Projects in the City of Manteca Project No. in Project Name Status Acreage Proposed Residential Exhibit 5-1 Units/(Acreage) 1 Antigua Under construction 36 120 2 Bella Vista Under construction 66.8 262 3 Bianchi Ranch/Paseo Built 104.5 454 4 Dutra Estates Under construction 77.3 426 5 Dutra Estates West In review 23.1 188 EDAW Manteca WQCF and Collection System Master Plans EIR Cumulative Impacts 5-2 City of Manteca