ARCHIVED REPORTS_1981 - Laserfiche WebLink

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LOCATION The proposed project is located on the south side of Harney Lane approximately one-half mile east of Tully Road, in northeast San Joaquin County (as shown in Figure 1). The site lies in the west one-half of Section 21, T3N, R8E, as identified on the Linden, California, topographic quadrangle, shown in Figure 2. STATEMENT OF OBJECTIVES The objective of the project is to establish a sanitary landfill of approximately 320 acres in size to replace the existing Harney Lane landfill located one mile to the west. The proposed site would provide urban waste disposal facilities for San Joaquin County's current and future populations as the existing facility is phased out. EFFECTS FOUND NOT TO BE SIGNIFICANT During the course of this study, the following environmental elements were determined as effects found not to be significant as identified in this section and are thereby not discussed in further detail in this report. The following brief discussions identify the rationale for establishing the lack of significance. Geology The.crystalline basement complex which underlies the study area is at an unknown depth. The sedimentary rocks which overlie the basement are of marine and continental origin and include indifferentiated Eocene and Creta- ceous marine sediments. Overlying these consolidated sediments are the Miocene Age Valley Springs and Mehrten formations. Above these formations lie the Laguna formation, which is of continental origin, and then a thin formation of Arroyo Seco gravel. Overlying this are unconsolidated Quaternary sediments including older alluvium and the Victor formation. The o.lder alluvium consists of sand, gravel, silt, and clay which were laid down by various streams originating in the Sierra Nevada Mountains The geologic formations which underlie the site influence the occurrence, movement, and quality of groundwater beneath the site. Most groundwater used in the eastern portion of San Joaquin County is extracted from the Arroyo -Seco, Laguna, and Mehrten formations; however, a number of wells obtain large yields from the sand and gravel stringers of the Quaternary sediments in the upper- most horizon. The subject of groundwater is discussed in greater detail in the groundwater hydrology section of this report.