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f DER <br /> 19. <br /> \\ � RightPropl<.Right SOWtloni <br /> V <br /> • 19. Norman's Nursery is making significant efforts beyond those required by the <br /> RWQCB to implement BMPs to further limit potential impact of fertilizers in the <br /> irrigation water on surface and groundwater quality. Those efforts include attempts <br /> to limit irrigation water and fertilizer use, and to decrease irrigation tailwater <br /> volumes and potential concentrations of nitrates in the tailwater. <br /> 7.2 RECOMMENDATIONS <br /> Based on the results of the monitoring conducted, published information and the <br /> conclusions outlined above, the following recommendations are made by Kleinfelder: <br /> A. Since surface water quality does not appear to be impacted significantly by <br /> Norman's Nursery's activities throughout the monitoring period at the subject <br /> site, Kleinfelder recommends that a new Monitoring & Reporting Program be <br /> fullv adopted and implemented as soon as possible or that the requirements <br /> for all monitoring cease. <br /> • B. The RWQCB may consider the nitrate in the shallow perched water to be a <br /> regional problem related to past and current property uses in the area. If <br /> considered a regional problem, continuous monitoring of the shallow aquifer <br /> by the nursery does not appear to be appropriate. If not considered to be a <br /> regional problem Kleinfelder would again recommend that the RWQCB <br /> review other potential sources of nitrates-nitrogen in the surface and <br /> groundwater within the area. Specifically Kleinfelder recommends that further <br /> investigation of nitrates in surface and shallow groundwater to the east, <br /> southeast and west of the nursery be conducted. <br /> C. The RWQCB should investigate potential sources of nitrates (other than <br /> Norman's Nursery) in the deeper groundwater as represented by samples <br /> obtained from production wells in the vicinity of the Dodge and Eason <br /> properties. These sources may include, but are not necessarily limited to, <br /> septic systems and fertilization in that area, and improperly sealed production <br /> wells and other potential conduits to the deeper groundwater. <br /> • I <br /> 117226.E02/ST01 2RO696 Page 40 of 43 September 14, 2012 <br /> Copyright 2012 Kleinfelder <br />