Laserfiche WebLink
Ceologic"i 1 TecluttcS l/c. <br /> i <br /> 1101 7"Street <br /> - x Modesto,California 95354 <br /> (209)5224119/Fax(209)522-4227 <br /> REPORT <br /> Groundwater Monitoring <br /> 4t" Quarter 2002 <br /> City of Escalon <br /> Former Arco Gas Mini Mart <br /> 1305 Escalon Ave. <br /> Escalon, CA <br /> Project No. 750.2 <br /> April 10, 2003 <br />` - EXECUTIVE SUMMARY <br /> This report summarizes the 4`h Quarter 2002 groundwater monitoring and sampling event <br /> that took place at the site on December 30, 2002. Twelve monitoring events have been <br /> completed to date since the groundwater investigation was initiated in April 2000. Trace <br /> levels of Xylene were present in MW-1. All other-monitoring wells were non-detect for. <br /> BTEX, TPH-G and the oxygenate compounds. The deep well MW-101 was non-detect for <br /> the seventh consecutive event. <br />� The groundwater gradient for December 30, 2002, is 0.0015 ft/ft flowing N801W. This in- <br /> consistent with past events (see Figure 2). Depth to. groundwater at the site, was <br /> approximately 63 feet below ground surface (bgs). <br /> A vertical groundwater gradient calculation was made for the September 2002 groundwater- <br /> monitoring event. The vertical gradient was found to be in a downward direction with a <br /> slope that is approximately equal to the water table horizontalg radient. <br /> The internal combustion engine (I.C.) was set in operation on February 5, 2002. The IC ran <br /> until February 27 2002 when it was shutdown n <br /> �--1 y n a d removed from the site because it was not <br /> r� properly controlling emissions. The IC was completely rebuilt and returned to the site on <br /> L <br />