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All storm water is contained within the quarry area and used in the washing of sands to gain clay and silt needed for the pond liner . This will reduce the amount of ground water required to supplement washing water . No significant effects to surface and ground water quality will result from the proposed surface mining operation . Mining will not disturb any perennial streams . Ground water will be pumped out through perimeter wells to an existing drainage easement , which runs under the Union Pacific Rail Road right-of-way in the southwest portion of the 162-Acre property boundary . During mining, as the ground water table lowers locally, water quality will remain unchanged . The dewatering process will draw water away from the quarry area and all excavation will occur on the dry bed of the quarry bottom . After excavation is completed, the bottom and sides will be lined with a Hypolon (Dupont) CSPE Liner and reinforced by a 12" clay liner or layer on the slope areas . 1 . 4 . 4 Biological Resources As discussed in the Biological Resources section (5 .4) , no significant resources will be impacted by the project . Generally speaking, a less than significant impact will occur because resources affected are insignificant when compared to the regional resource population and/or the impact will be temporary and shall be remediated by reclamation to the proposed subsequent land use or alternatively, in the absence of an approved use permit for the subsequent land use, to the original land use of almond orchard . 1 . 4 . 5 Noise Noise impacts will be less than significant . There will be some noise associated with the operation of mining equipment and haul trucks , but due to the operation ' s proximity to two major freeway routes and two railroads , the project ' s noise will be unnoticeable over the existing background levels . That additional noise will be mitigated by assuring that all equipment associated with the operation will be equipped with approved manufacturers ' noise suppression mufflers and similar devices . Landmark Lathrop Group, LLC 5 - February 3, 2000