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at least a one foot water cover over the anaerobic sludge layer. The effluent or drawoff line should be placed near,but below the water surface at the south end of the pond, adjacent to the application area. This pipe level should be controllable and with a locking device. There must be now measurement meters on both influent and effluent lines. The following contingencies will be made in the event adverse conditions develop with the If BOD5levels cannot be reduced sufficiently, a Dissolved Air operation of the facultative pond: er tank will be installed before wastewater enters the Flotation (DAF) treatment system or skimm e pond become objectionable leading to complaints, an facultative pond. Secondly, if odors from th aerator(s)will be installed in the pond. Thirdly, if effluent quality is substandard, there is sufficient acreage to install a polishing pond before land application. G. PROPOSED FACULTATIVE POND MONITORING Section 4, Paragraph 4.13 of the San Joaquin County Environmental Health Sewage Standards states monthly monitoring by a certified sewage plant operator is required. Analyses required may include BODS,DO, SS, TKN, etc. of influent and effluent. Results of analyses must be made available to the Director of Environmental Health and the Central Valley Regional Water Quality Control Board. As referenced before,the average daily flows and peak flows are to be determined by placing a flow meter on both the fresh water supply and on the flow into the facultative pond. H. CURRENT GROUNDWATER QUALITY AND PROPOSED GROUNDWATER MONITORING Groundwater analyses was conducted of both the top aquifer (zone of saturation) and the on-site domestic well (See Appendix). Results indicate high nitrate in the upper saturated zone of 120 ppm which is to be expected in agricultural production areas, and virtually no nitrate from the domestic well. Salts are high throughout the saturated zones, also indicative of this locale due to apparent salt water intrusion. As stipulated by the San Joaquin County Environmental Health Department, groundwater monitoring will consist of two monitoring wells, one situated upgradient and one downgradient to be monitored yearly for potential impact. Wells will be installed after development of the abattoir. I. GROUNDWATER DIRECTIONAL FLOW Three boreholes were drilled on January 21, 1998 to measure current static water levels and determine groundwater directional flow. The attached potentiometric surface map indicates the groundwater is flowing toward the east. The following table represents each borehole surface elevation as surveyed (mean sea level) and static water level measureRmenttWATER ELEVATION No. GROUND ELEVATION� TFR LEVEL MEASUREMENT' _ — 1 9.92 R 10.7 ft -0.78 ft 2 9.88 R 10.4 ft -0.52 R 3 8.47 ft 7.9 ft 0.67 ft -46- Vaffey Ag 9?4search