Laserfiche WebLink
r",T,ABLE 2 <br /> PERCOLATION TEST RESULTS FOR BUILDINGS A&B WITH CORRESPONDING SOIL <br /> TYPE,PERCOLATION RATE AND APPLICATION RATE IN GALLONS/FT=/DAY <br /> BD-AS (Bldg A-South) 125 min/inch / 0.100 gallons/ft2/day <br /> BD-BS (Bldg B-South) 41.7 min/inch / 0.400 gallons/ft2/day (/ <br /> BD-AN(Bldg A-North) 35.7 min/inch / 0.467 gallons/ft2/day <br /> BD-BN(Bldg B-North) 35.7 min/inch / 0.467gallons/ft <br /> 2/da <br /> Application Rates adapted from Table 3 of the OWTS Policy of the SWRCB and is correlated with the Perc Rate obtained. <br /> D. GROUNDWATER INFORMATION <br /> NLS§2.1, SSS§ 4.1. There has been groundwater monitoring over the entire North Tracy/Holly <br /> Commerce Center that has determined the water table to be relatively shallow in this locale. <br /> Siegfried has completed an entire topographical survey of the project, which has been correlated <br /> with the measured water table elevations. <br /> NLS§2.2,3.1, SSS§ 2.1,4.2. Since the surrounding properties have been farmed for a number of <br /> decades, this has been one source to have contributed an increase in nitrate concentration within the <br /> water table and upper groundwater aquifers. The adjacent City of Tracy Wastewater Treatment <br /> Plant may be another. <br /> A water table sample was retrieved from a boring near the center of the subject property. Test <br /> results reveal a nitrate as nitrate concentration of 109 ppm, which is 2.4x the drinking water <br /> Maximum Contaminate Level (MCL) for nitrate. Total Alkalinity is a very low 15 mg/L and <br /> discussed below. The electrical conductivity is also a low 4.74 mmhos/cm and the pH is alkaline at <br /> 7.7. The Total Kjeldahl Nitrogen (TKN) is the measurement of the ammonium and organic <br /> nitrogen fractions, and was also found to be a low concentration. The following Table summarizes <br /> the test results: <br /> TABLE 3 <br /> WATER TABLE (WT) UNDERLYING EFFLUENT DISPOSAL AREA: <br /> ANALYTICAL RESULTS OF TESTED CONSTITUENTS <br /> SAMPLE ID NITRATE TOTAL TOTAL TOTAL Ec pH <br /> K.IELDAHL NITROGEN ALKALINITY <br /> NITROGEN(TKN) <br /> BDG A&B WT 109 mg/L 5.6 mg/L 114.6 mg/L 15.0 mg/L 4.74 mmhos/cm 7.7 <br /> NLS§2.3, SSS§4.3, 4.4, 4.5,4.6. There are no on-site domestic or irrigation wells on the subject <br /> LParcebe sampled to quantify nitrate concentrations from the lower aquifers. Domestic water <br /> City of Tracy will be supplied for this project. <br /> Page -4- <br /> Chesney Consulting <br />