Laserfiche WebLink
fry u - ATC Associates Inc " <br /> v 1117 Lone Patin Avenue, Suite B <br /> Modesto, California 95351 <br /> 209-579-2221 <br /> fax 209-579-2225 <br /> A S S O C I A T E S 1 N C <br /> February-2, 2005- n"DECEN E`" <br /> 54 25847 0037 - FC-8 2405 <br /> r �hvl�,pN�}�NT HI�AI<�H <br /> Ms Victoria McCartney \11g0t 1�Et4T C1=S <br /> San Joaquin County <br /> Environmental Health Department r1J3 <br /> 304 E NVeber Street, Third Floor <br /> Stockton, California 95202 <br /> Subject- Monitoring Report Fourth Quarter 2004, Former Cheaper Store #137, 15 East <br /> Grant Line Road, Tracy, California, Local Oversight Program (LOP) # 1404 , <br /> Dear Ms,McCartney <br /> This report presents the results of quarterly groundwater monitoring and sampling performed on <br /> December,1, 2004, by ATC Associates Inc at the site located at 15 East Chant Line Road, Tracy, <br /> Cahforiva,,(Figure 1) Sampling was performed to monitor the distnbution of petroleum <br /> hydrocarbons in groundwater at the site Monitoring was performed to determine the <br /> groundwater flow direction and the hydraulic gradient in the uppermost aquifer <br /> SITE HISTORY- . <br /> On March 3, 1988, two 10,000-gallon underground storage tanks (USTs) were excavated and <br /> removed_from the site One was used to store leaded gasoline and one was used to store <br /> unleaded gasoline Groundwater was encountered in the UST excavation at approximately seven <br /> feet below ground surface (bgs) Laboratory analyses of two samples of groundwater collected <br /> from within the excavation indicated the groundwater, had been impacted by petroleum <br /> F <br /> hydrocarbons <br /> On March 29 and 30, 1988, three monitoring well�,(MWI, MW2, and MW3)were installed at the <br /> site and a sensitive receptor survey within a 2,000-foot radius of the site was conducted by <br /> Klemfelder `According to Kleinfelder's Group fi;,ater Assessment Report dated April 12, 1988, <br /> petroleum hydrocarbons.Were not detected at or above laboratory reported detection hmits in the <br /> groundwater samples collected from MW1, MW2, and MW3 on April 1 and 4, 1988 The <br /> groundwater flow direction was reported to be toward the north <br /> On April F19, 1988, an additional monitoring well (MW4) was installed north of the former <br /> location of the USTs According to Kleinfelder's Additional Monitoring Well report dated April <br /> 22, 1998, petroleum hydrocarbons were detected in the groundwater sample collected from MW4 <br /> on April 19, 1988 The groundwater flow direction was reported to be toward the northwest on <br /> April 20, 198$ <br /> s+e,lwunm«,2a�12s$47�bQ371r oar\3qr-2004 d. 1 <br /> Eai¢+ <br /> ,7 <br />