SU0003053 SSNL - Laserfiche WebLink

Home Browse Search

August 23, 1994 Mr. Louis Pratt California Regional Water Quality Control Board Central Valley Region 3443 Routier Road Sacramento, CA 95827-3098 RE: Fred Douma Dairy-Monitoring Program This report outlines the Monitoring Program for the proposed Fred Douma Dain-which is to be located on Kasson Road and Linne Road, near Tracy, CA. The purpose of this Monitoring Program will be the evaluation of potential impact of the dairy's waste management system on groundwater quality. Additionally, the Program will demonstrate that the amount of nutrients and water applied to the subject property cropland will not exceed crop requirements. Monitoring of the soil in the open corral areas will begin after completion of earthwork procedures, prior to cows moving onto the site. During construction of the corrals, fill material will be compacted in life to 90% relative compaction and randomly tested. After completion, double ring infiltrometer and permeability tests will be performed in designated areas of the corrals to correlate this data with any potential future impact from wastes. Beginning with the virgin corrals, baseline soil samples will be retrieved from depths of 6-12" and 24-30" in specific areas of the corrals. Subsequent soils samples will be retrieved and analyzed on a yearly basis to assess potential downward migration of nutrients, specifically nitrogen. In addition, the soil in the wastewater lagoon will be hydrometer tested prior to use. The second aspect of the Monitoring Program will consist of the underlying groundwater. Baseline groundwater samples have been retrieved and analyzed as of September 1, 1994. Monitoring of groundwater will be initiated after completion of the construction of the dairy, before cows being moved onto the site. It is proposed that four borings will be drilled in equidistant sites around the dairy. These borings will be left open for 24 hrs, at which time the static water level will be measured in each boring. From this data, groundwater directional flow will be calculated_ After this determination of flow direction, three monitoring wells will be installed into the shallowest aquifer with one well upgradient and two wells dow-ngradient from the actual diary site. A detailed work plan will be submitted to the Regional Board before initiation of this installation procedure. Sampling of these three wells will be in accordance to The Practical Guide for Ground-Water Sampling - EPA document 600/2-85/104. Analyses for particular constituents will be referenced in the work plan.