Laserfiche WebLink
KLE/NFELDER <br /> 6tlgMYeaple.ft.,5.1.1— <br /> appears <br /> .1.1 nsappears that the source(s) of the deep aquifer nitrates is located off site in the <br /> areas of the Dodge and Eason wells. <br /> 14. The MCL of 10 mg/I was not exceeded in any of the surface water samples <br /> collected from sample locations with the exception of location D-1. The nitrate as <br /> N MCL was exceeded in 4 of 8 samples collected from location D-1 in the first <br /> quarter and 3 of 8 samples collected during the second quarter of 2012. The <br /> WQGs for ammonia as N, including the SNARL and T&O Threshold were not <br /> exceeded in any of the surface water samples collected from sample during the <br /> quarter. <br /> 15. Rainfall was monitored on the Norman's Nursery site by nursery personnel from <br /> June 2, 1997 to present. There were 22 days of noted precipitation recorded <br /> during the first and second quarters. The precipitation total was 9.13 inches in the <br /> first quarter and 4.60 inches during the second quarter, resulting in 13.73 inches <br /> for the calendar year. Precipitation totals for each day are listed on the attached <br /> Table 2 and graphed on Chart 2-8. <br /> • 16. The vineyard operation ("Duarte Property") to the south of Norman's Nursery has <br /> on occasion allowed their runoff to enter the Norman's Property in the streambed <br /> south of Basin C. <br /> 17. Three dewatering wells were installed in 2002 along the nursery's northwest <br /> boundary, east of Escalon-Bellota Road and west of MW-5. The dewatering wells <br /> are spaced approximately 75 feet apart, extending north to south. The dewatering <br /> wells still operate. Discharge from the dewatering wells is directed to Basin B for <br /> denitrification treatment. Groundwater samples were collected from the dewatering <br /> discharge. The MCL for nitrate as N was exceeded in 5 of the 13 weekly <br /> dewatering discharge samples collected during the first quarter and in each of the <br /> 13 dewatering discharge samples collected during the second quarter of 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 <br /> the gauge in October 2003, water levels have not been measured in Basin B. <br /> Kleinfelder recommends the replacement of the water level gauge in Basin B. <br /> • <br /> 117226.E02/ST012R0696 Page 39 of 43 September 14, 2012 <br /> Copyright 2012 Kleinfelder <br />