Laserfiche WebLink
1 <br /> i <br /> SIERRA <br /> Clint Rogers Page 2 <br /> March 25, 1991 <br /> �In June of 1990,fthe tank's venting system was upgraded and while the tank excavation <br /> was open, soil samples were collected from approximately five feet below the ground surface. The <br /> samples were submitted to Hanby Analytical Lab in Houston. Texas for analyses (Appendix Q. <br /> Trace concentrations(maximum of 0.025 ppm) of total benzene,toluene, ethylbenzene,and xylene <br /> (BTEX) compounds were detected in the soil samples. <br /> TOPOGRAPHIC AND GEOLOGIC SETTING <br /> The site is located in the City of Lodi, San Joaquin County. The topography of the site is <br /> relatively flat. The closest surface water is an unnamed tributary of Bishop Cut located <br /> approximately 1 mile west of the site. The Bishop Cut flows south into the San Joaquin River. <br /> Based on topography, the ground water flow direction in the site vicinity is estimated to <br /> be westerly to southwesterly. Based on the topographic elevation of the site and the elevation of <br /> the San Joaquin River, the depth to ground water at the site is estimated to be 50 ft below grade <br /> or less. <br /> k No subsurface work has been completed at the site to-date; however the soil in the site <br /> vicinity is mapped as Quaternary alluvium (clay, silt, sand and gravel).` <br /> There is a water well located at the fire department. The well is approximately 360 ft deep <br /> and the water is used for fire control, not as a source of drinking water. <br /> SCOPE OF WORK . <br /> In order to determine the presence or absence of hydrocarbons in soil and ground water <br /> at the site and to determine the ground water flow direction in the site vicinity, SES will drill 3 soil <br /> 61 <br /> 1 Jennings, 1977, Geologic Map of California, California Division of Mines& Geology, Map #2. <br />