Laserfiche WebLink
Soil Suitability&Nitrate Loading Evaluation CTE Job#25-1256G <br /> New Septic Leech Lines <br /> 9490 E Schmeidt Rd <br /> Lodi, California <br /> June 29, 2022 Page 4 of 10 <br /> A sample of the groundwater from the existing well on site was obtained and tested for nitrate <br /> levels. The sample was stored in a cooler bag and delivered to an analytical laboratory (California <br /> Laboratory Services) within the same day and tested per EPA method 300.0. Nitrate concentrations <br /> in the groundwater were found to be at 0.43 mg/L. <br /> 6.0 GROUNDWATER <br /> No free groundwater was encountered within the percolation test hole performed for our <br /> evaluation. Based on information contained on the California SGMA Data Viewer site <br /> (hgps:Hsgma.water.ca. ov/web ig s/?gppid=SGMADataViewer# wlevels), ground water flows <br /> toward the South and historic high groundwater level is shown to be 121 feet begs (Spring 2020). <br /> The 110-foot groundwater level is consistent with historic high (1983 and 1999) groundwater <br /> levels shown in the "San Joaquin County Environmental Health Department Onsite Wastewater <br /> Treatment Systems Local Agency Management Program"publication. <br /> 7.0 SOIL PROFILE <br /> Published (USDA, Soil Survey of San Joaquin County, California, dated September 2021) <br /> mapping indicates soils at the site consists of "Kingdom Fine Sandy Loam" described as fine <br /> sandy loam in the Northern area of the site and "Tokay Fine Sandy Loam" in the central and <br /> Southern area of the site and is described as a fine sandy loam underlain by sandy loam. The <br /> septic tank absorption field rating for the above soils is indicated to be "very limited" due to the <br /> soils generally having slow water movement. Based on published geologic mapping --"Geologic <br /> Map of the Sacramento Quadrangle" (CDMG Map Sheet IA, 1981) the site is indicated to be <br /> underlain by the Modesto Formation (Qm). Such deposits are considered to be consistent with the <br /> USDA soils on site and Hydrologic Class `B" in the North and "A" in the central and Southern <br /> % M <br /> 7(-AALI .INC <br />