SU0004222 - Laserfiche WebLink

Home Browse Search

`. .� am (0 The EHD will make a determination on the feasibility of connecting the new milk barn effluent to this existing septic system. Sewer connections will be dependant upon the final elevations of the invert of the milk barn sewer outlet and the invert of the existing septic tank. This is in accordance with Item "H" in the Conditions of Approval from EHD. It is imperative that a 100%replacement area be set-aside for eventual repair. This replacement area may be used while the primary leachfield area"rests and rehabilitates." Effluent management can then be converted back to the primary field with this cycle continuing indefinitely. Sufficient replacement area exists to the south of the existing disposal area that serves the referenced mobile home. C. ON-SITE WELL WATER AND IRRIGATION WATER INFORMATION Currently, there are four wells at the de Snayer Dairy facility: 1.) The irrigation well at the west end of the freestall barns, 2.) A domestic well west of the existing office, 3.) Another domestic well near the shade corrals, and 4.) A new domestic well drilled in July 2001, that is west of the actual dairy facility. The only well log available for these wells was the Well Permit from EHD for the new well. A minimal lithology description on the Well Permit for the west well illustrates the underlying strata to consist predominately of clay from the surface to 125 below ground surface (bgs) and sand strata from 125 feet to 162 feet. The well has a grout seal to 100 feet consisting of 9 sack grout. The irrigation well and the domestic well near the shade corrals are scheduled for destruction when construction of the milk barn commences. Only the new west well and the north well will provide domestic water for the de Snayers', their employees, and water for the dairy cows. The EHD stipulated the domestic well west of the office and the new domestic well be tested for the agrichemical Dibromochloropropane (DBCP), Ethylenedibromide (EDB) and nitrate. However, several other constituents were also tested as noted on the Analysis Reports, to establish baseline concentrations. In addition, the domestic well serving the two single family residences at the Acampo Ranch was sampled from a sample port at the wellhead for several constituents. The irrigation well west of the freestalls was also sampled from the overhead for several constituents. The well water test results indicate that nitrate concentrations are a function of well screening depth. The new well is 140 feet deep. While the exact depths of the other tested wells are unknown, they are known to be less than 140 feet deep. Consequently,the shallower wells have higher nitrate concentrations, with the North well and the Acampo well exceeding the Maximum Contaminant Level (MCL) for nitrate. The de Snayer employees who use water from these two _ wells are supplied with bottled water for drinking and cooking purposes. Both DBCP and EDB were Below Detection Limit (BDL), which is equivalent to non-detect(ND) _ in the West well,North well and the Acampo Ranch well. Given that the acreage surrounding these wells have been planted in vineyards for a number of decades, detecting these two agrichemicals in the groundwater was a possibility. A summary of the water analysis test results are as follows: -16 �jj - Chemq Consuhing