Laserfiche WebLink
Percolation Test Irerracon <br /> Dietrich Property v Lodi, California <br /> March 10, 2020 ■Terracon Project No. NA207009 <br /> The following table presents a log of the soil borings. <br /> Table 1 <br /> Summary of Soil Lithology <br /> Boring Depth Soil Type Unified Soil <br /> Interval (ft) Classification <br /> 131 0-3.3 Sandy silt ML <br /> 132 0-3.0 Sandy silt ML <br /> Both borings (B1 and B2) were prepared for a percolation test per the San Joaquin County EHD <br /> Percolation Test Procedure dated 2011. Approximately four inches of"pea gravel" was placed in <br /> the bottom of the open boring B1 and two inches of pea gravel was placed in the bottom of boring <br /> B2. A 2.0-inch diameter PVC pipe with perforations towards the bottom was installed on top of <br /> the gravel and the boring was presaturated with approximately 12 inches of water over gravel. <br /> February 27, 2020 borings B1 and B2 were found to be dry and intact on the day of the percolation <br /> test. Approximately 0.5 feet of water was added over gravel and the drop in water level was <br /> recorded every 30 minutes over a four hour period. The final 30 minutes of the test was observed <br /> by EHD representative Mr. Naseem Ahmed who signed the percolation test form. <br /> Table 2 <br /> Summary of Percolation Test <br /> Test No. Percolation Test Percolation Rate Test Duration Comments <br /> Date Tested Depth(feet) (min/in) (hours) <br /> 131 3.33 8.06 4 Satisfactory <br /> 02/27/2020 Percolation Rate <br /> B2 3.0 250 4 Unsatisfactory <br /> 02/27/2020 Percolation Rate <br /> A satisfactory percolation rate is 60 minutes per inch or less for shallow leach lines and 30 minutes <br /> per inch or less for septic pits per San Joaquin County Onsite Wastewater Treatment Systems <br /> Standards (EHD 42-014), January 2017. <br /> Responsive ■ Resourceful ■ Reliable 2 <br />