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KLE/NFELOER <br /> \\ s,rgntreogm Rigesowvo,,.. <br /> 16 . The vineyard operation ("Duarte Property") to the south of Norman 's Nursery has on <br /> occasion allowed their runoff to enter the Norman 's Property in the streambed south of <br /> Basin C. No runoff was observed during the fourth quarter 2012. <br /> 17 . Three dewatering wells were installed in 2002 along the nursery's northwest boundary, <br /> east of Escalon-Bellota Road and west of MW-5 . The dewatering wells are spaced <br /> approximately 75 feet apart, extending north to south . The dewatering wells still operate . <br /> Discharge from the dewatering wells is directed to Basin B for denitrification treatment. <br /> Groundwater samples were collected from the dewatering discharge. The MCL for <br /> nitrate as N was exceeded in 11 of the 12 weekly dewatering discharge samples <br /> collected during the fourth quarter 2012 . <br /> 18. During previous routine maintenance of Basin B , which included the excavation of <br /> sediments , the water level measuring gauge was removed . Since the removal of the <br /> gauge in October 2003 , water levels have not been measured in Basin B . Kleinfelder <br /> recommends the replacement of the water level gauge in Basin B . <br /> t= <br /> 19 . Norman 's Nursery is making significant efforts beyond those required by the RWQCB to <br /> implement BMPs to further limit potential impact of fertilizers in the irrigation water on <br /> surface and groundwater quality. Those efforts include attempts to limit irrigation water <br /> and fertilizer use , and to decrease irrigation tailwater volumes and potential <br /> concentrations of nitrates in the tailwater. <br /> 7 .2 RECOMMENDATIONS <br /> Based on the results of the monitoring conducted , published information and the conclusions <br /> 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 site, <br /> Kleinfelder recommends that a new Monitoring & Reporting Program be fully <br /> adopted and implemented as soon as possible or that the requirements for all <br /> 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 by the <br /> 117226.E02/ST013R0176 Page 37 of 40 January 31 , 2013 <br /> Copyright 2013 Kleinfelder 'I <br />