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y a French Campgh and the San Joaquin r are migratory <br /> routes for king an silver salmon and striped ass , which spawn <br /> upstream; many waterfowl also frequent the area; in the urbanized <br /> areas, domestic animals and wild animals tolerant of human <br /> activities are found. <br /> The California Natural Diversity Database has one record of <br /> a threatened or endangered species occurring within the planning <br /> area, a recorded sighting of the Delta Coyote-thistle. In <br /> addition, the Manteca vicinity provides habitat which may be used <br /> by other important species: slough-thistle, Aleutian Canada <br /> goose, Swainson's hawk, greater sandhill crane, San Joaquin kit <br /> fox, and valley elderberry longhorn beetle. <br /> Few significant natural areas occur in the vicinity of <br /> Manteca. Vernal pools have not been reported within the planning <br /> area. No wild and scenic rivers flow through or near the <br /> facilities or disposal site or the service area. Neither the <br /> facilities or disposal site nor the service area are within the <br /> coastal zone or a floodplain. <br /> The Cities of Manteca and Lathrop use groundwater as the <br /> sole source for drinking water. Area water levels are buoyed by <br /> the proximity of the Delta channels to the west and recharge from <br /> irrigation of agricultural lands surrounding the cities. In <br /> addition, groundwater recharge occurs from the Stanislaus River <br /> and the hills to the east of the planning area. <br /> Saltwater intrusion into public wells has been identified in <br /> the past as a problem in Lathrop. Wells have been closed as a <br /> result. Testing of wells for saltwater intrusion is required by <br /> the San Joaquin County Health Department within an area bounded <br /> by Airport Way in the east, French Camp Road on the north, <br /> Interstate 5 in the west , and Lathrop Road to the south. Where <br /> high salinity levels are found, the Health Department has the <br /> authority to seal off upper aquifers to protect upward migration <br /> of saltwater. There are concerns about the ability of the <br /> groundwater source to continue to meet water quality standards <br /> and water supply needs in Manteca and Lathrop in future years. <br /> Within the City of Lathrop, there are two areas where <br /> contamination of groundwater by toxic chemicals has occurred. <br /> Chlorinated volatile organics and arsenic have been found in the <br /> groundwater on and around Sharpe Army Depot on the north end of <br /> town. A monitoring program is currently underway. Significant <br /> groundwater contamination has also occurred in the south of town <br /> on the J.R. Simplot property, south of Louise Avenue and west of <br /> Howland Road. Under the former operation and ownership of <br /> Occidental Chemical Corporation, the facility experienced chronic <br /> spills and leaching from waste piles and various pesticides, <br /> herbicides and fumigants manufactured on the site. The releases <br /> resulted in the contamination of the underlying groundwater which <br /> then migrated to the west under the vacant land targeted for <br /> development known as the Crossroads Industrial Park (aka the <br /> Kearny Ventures site. ) A groundwater remediation effort is <br /> currently underway, including the operation of several <br /> groundwater extraction wells and numerous monitoring wells. <br /> 2 <br />