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2.0 ENVIRONMENTAL SETTING <br /> 2.1 LAND USE <br /> 1 . The site incorporates an olive plant with a processing and canning facility. Two Class 11 surface <br /> impoundments are located southeast of the plant structures. These two surface impoundments <br /> accept briny production water from the plant by gravity drainage. The Regional Water Quality <br /> Control Board has adopted Waste Discharge Requirements Order No. 96-075 reflecting the <br /> operations and maintenance of the Class II waste management units. <br /> 2. Wastewater irrigation has been applied to 4.5 acres northwest of the olive plant structures where <br /> crops have been grown to accommodate production water with high total dissolved solids (TDS). <br /> This project proposes to expand that area to approximately 200 acres. Eventually up to 500,000 <br /> gallons per day of production water will be spray irrigated on site as the land is agriculturally <br /> prepared with mulch and crops are planted to absorb the discharged water. <br /> 2.2 TOPOGRAPHY AND DRAINAGE <br /> I The elevation of the subject property varies from 260 feet mean sea level (MSL) adjacent to <br /> Interstate Route 580 to 340 feet MSL on the southwestern portion of the property. The <br /> topography is dominated by rolling hills. The slopes vary from 0% to 25%. This is typical of this <br /> area, which is a transition zone between the San Joaquin Valley and the Diablo Range of the <br /> Coastal Mountain Range. <br /> 2. Surface water runoff from the upper parcel goes under culverts in the railroad embankments. It <br /> then commingles with the surface water runoff on the lower parcel. This water combines into one <br /> stream channel which passes diagonally through the lower site and exits the facility and flows <br /> under Highway 580 near the lined ponds into an unnamed, dry creek bed. <br /> 2.3 GEOLOGY, SEISMICITY AND SOILS <br /> I The geologic deposits are described in the Geologic Map of the San Francisco-San Jose <br /> Quadrangle, California, 1991. The fanglomerate deposits consist of conglomerate, sandstone, <br /> and siltstone of the Miocene/Pliocene(Quaternary)age of the San Joaquin Valley. The formations <br /> include the Oro Lomo and Carbona Formation basin deposits (?). The hills to the east of the <br /> facility encompasses the Miocene San Pablo Group of sandstone,mudstone, siltstone and shale <br /> with minor tuff(includes Neroly Sandstone, Cierbo Sandstone, and Briones Sandstone), marine. <br /> 2. There are signs of earthquake activity in this portion of San Joaquin County. It does not appear <br /> that any faults traverse the sight,however, the Midway Fault and the Black Butte Fault are close to <br /> the site and the Patterson Pass Fault is to the south. The Midway Fault is an inferred fault with no <br /> recorded evidence of seismic activity. The Black Butte Fault cuts strata of Quaternary age. The <br /> Patterson Pass Fault's location is imprecise and the nature of movement, if any, is uncertain. <br /> 3. San Joaquin County can also be affected by seismic activity occurring in other part of the state. <br /> Fault systems which could affect the County include the San Andreas,Hayward, and Calaveras <br /> Faults. Due to the potential of earthquake activity, all construction in San Joaquin County must <br /> meet the requirements of the Uniform Building Code Seismic Zone Three which requires <br /> "earthquake resistant" construction. These construction techniques should be adequate for <br /> protection from possible seismic activity at this site. <br /> 4. Soils at the facility are predominately clay,clayey silt, and silty clay. Two thirds of the western <br /> portion of the facility is located on materials from the Pliocene period which consist of <br /> -2- <br />