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The dewatering pumping proposed system is to drill 100 temporary <br /> dewatering well ' s around the proposed excavation, to aid in lowering the <br /> static table. The wells will be drilled to 7O' depths, set commercially <br /> slotted casings, place clean washed pea gravel and set 2% horse power <br /> pumps in each well . The wells will be located 150 feet outside the <br /> quarry perimeter . The water will be discharged through our existing <br /> storm and irrigation easement to the San Joaquin River or pumped over <br /> the levee within our property boundary to the San Joaquin River . (See <br /> location map and water tests for water quality in Appendix "B") This <br /> includes ground water tests from well #60 and #160 by Geoanalytical <br /> Laboratories plus San Joaquin River Semi -Annual report by City of <br /> Manteca WQCF Monitoring Data 1999, located 100 ' South of Union Pacific <br /> Railroad Crossing of the San Joaquin River . These tests show that the <br /> ground water is of a higher quality than the river water and discharge <br /> of this water into the river will not degrade existing water quality . <br /> 5 . 4 Biological Resources <br /> 5 .4 . 1 Wetlands <br /> NONE <br /> In a survey of watercourses in the excavation area, no evidence of <br /> defined banks or beds was found <br /> Drainages have been evaluated for potential U . S . Corps of Engineers <br /> (COE) jurisdiction under Section 404 of the Clean Water Act (33 USC <br /> 1344) . The total area of these natural features is estimated to be <br /> less than an acre with none occurring in the proposed excavation area . <br /> None may be judged "waters of the United States" subject to COE <br /> jurisdiction <br /> 5 . 4 . 2 Tree Conservation <br /> San Joaquin County has promulgated an ordinance to protect certain trees <br /> in the county. Chapter 9-1505 of the County Development Title addresses <br /> removal , replacement , and other requirements germane to Native Oak <br /> Trees, Heritage Oak Trees, and Historical Trees as defined in the Title . <br /> Blue oaks are among the species which may be categorized as the <br /> foregoing if minimum trunk diameter requirements are met . No Protected <br /> Trees exist on the site. Accordingly, no significant impacts will occur <br /> due to tree conservation requirements . <br /> Landmark Lathrop Group, LLC <br /> 3 - February 3, 2000 <br />