Laserfiche WebLink
GRCJUNDWAIW MONITORING <br /> €f <br /> E The three wells were monitored to determine depth to water <br /> and presence of free floating product, if any, The monitoring <br /> was conducted in accordance with Groundwater Tachrology°s <br /> Standard Operating procedure SOP 8. A summary of the three <br /> monitorings conducted to date is presented in Table 1. <br /> GROUNDWATER SAMPLING <br /> r The monitoring wells were df:veloped by hand bailing and <br /> ' C sampled on October 3, 1986, with an EPA approved teflon sampisr. <br /> Groundwater samples were collected, preserved and transported <br /> under Chain-of-Custody in accordance with Groundwater Technology <br /> Standard Operating Procedures SOP 9, 10 and 11 (See Appendix <br /> II). The samples were analyzed for total petroleum hydrocarbons, <br /> benzene, toluene and xylene by EPA Method 5020/8015 and 5020/ <br /> 8020. The laboratory test results are summarized in Table 2 and <br /> the laboratory hard copy results are presented in Appendix III. <br /> SITE CONDITIONS <br /> SyDROGEOLOGY <br /> �j -The general geology around the site study consists of a <br /> thick sequence of river channel and flood plain deposits. These <br /> sequences contain interbedded sand, gravel, silt and clay <br /> layers. There are several water bearing zones underlying the <br /> site. The- shallowest water occurs at a depth of approximately 24 <br /> feet as recorded in wells at the site, the deepest water bearing <br /> zone is more than 1000 feet deep. <br /> The soils which underlie the Pershing Avenue site consist of <br /> interfingered layers of brown silty clay and brown silty sand <br /> The water bearing unit underlying the site is composed of <br /> i . <br /> a coarse well sorted sand and gravel. <br /> 6 <br />