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SANJOAQUIN -) _COUNTY \\7`4P:/ Greatness grows here. Environmental Health Deoartment 4.6 Identify the maximum daily volume of wastewater generated from all fixtures at the site, using the full build out of the project. (phased projects can use phased approach but must include information for each phase to full potential build out). 7 5.0 SITE EVALUATION INFORMATION 5.1 Flooding, thickness/depth of vadose zone, lithology of vadose zone, percolation testing results = permeability of soils, slope, rock outcrops, site topography 5.2 Soil profile through borings, excavations 5.2.1 Site map showing the location, with dimensions, of the soil profile pit on the parcel. 5.2.2 Description of soil profile pit including depth and dimensions. / 5.2.3 Description of soil lithology, soil texture, structure, color, and saturation - (Page 31-34 EPA DM) 5.2.4 Discussion of any potential problems predicted and/or the need for an engineered or alternative septic system. / 5.3 Percolation Testing 5.3.1 Permit obtained 5.3.2 The test conformed to SJC Policy EHD 02-02 (correct depth, diameter, 2" gravel, 6" water he' refill, correct readings recorded). (make sure all items on check list are included here) 5.3.2.1 Description of the date, time and protocol used to prepare the test hole, including w" depth and dimensions of hole, preparation of hole, and depth of water used to presoak (minimum 12 inches). 5.3.2.2 Description of the date, time and condition of the test hole after the 24-hour soak 4,-1 period (hole still intact, hole dry, depth to water remaining in hole, etc.) 5.3.2.3 Complete Percolation Test Form (including readings) was provided with REHS verification signature. The rate was correctly calculated using the last reading. 5.3.2.4 5.3.3 Perc rate compared to estimated hydraulic characteristics table (Page 39 EPA DM). If not comparable need to determine why. 5.3.4 Perc rate compared to Table 1.10.1 SJC Standards for minimum depth to water and standard or engineered system to determine appropriate/adequate wastewater loading area 5.3.5 Site map showing the location, with concise and accurate dimensions of the percolation test holes on the parcel. 5.3.6 The minimum number of shallow and deep percolation tests was performed for each parcel. (specify what is required) 5.3.7 Discussion of percolation rates in relation to the type, size and location of future leach fields needed at the site. (use what to determine dispersal area?) 5.4 Description of the chemical and physical properties of the soils underlying the site. 5.5 Description of the mass transport properties of the soils underlying the site with respect to nitrate ,2 and/or any other constituent of concern identified for the project site. Use EPA DM or WA State info 5.6 6.0 GROUNDWATER INFORMATION 6.1 Depth to water data for wells within 2 miles of the site 7 Use Casgem: https://www.casgem.water.ca.gov/OSSAS(srvaClissbtqyznmsohafqvlm))/Defaultaspx?ReturnUrlqoss Use Geotracker: http://geotracker.waterboards.ca.gov/ 6.2 Identify current depth to water and date measured. I 6.3 Identify highest depth to water and date measured. 6.4 Identify general gradient and direction of groundwater flow, based on actual data, cite source of data. EHD 26-02-002 Page 2 of 2 Nitrate Loading Study Checklist 7/14/2003