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EA1_Tit <br /> .'-�ILI®' GROUNDWATER 3 ��`� �� <br /> AN <br /> 8 <br /> TECHNOLOGY, INC. <br /> 1401 Halvard Dnve Surte140 West Sacramento CA 95691 (916)3 7 2-4 700 <br /> FAX(916)372-8781 <br /> August 10, 1995 <br /> Mr Bob Vasquez <br /> The Southland Corporation <br /> 3146 Gold Camp Road, Suite 300 <br /> Rancho Cordova, CA 95670 <br /> Subject Third Quarter 1995 Monitoring and Sampling Report <br /> Southland Site No 20680 <br /> 9110 Thornton Road <br /> Stockton, California <br /> GTI Protect No 02070 0133 <br /> Dear Mr Vasquez <br /> This letter describes the methods and results of monitoring and sampling activities performed by <br /> Groundwater Technology, Inc between April 1 and July 31, 1995, at The Southland Corporation <br /> (Southland) Site No 20680 located at 9110 Thornton Road in Stockton, California (Figures 1 and 2, <br /> Attachment 1) A summary of activities conducted during this reporting period is provided below <br /> ■ Depth to water (DTW) was gauged in 24 groundwater monitoring wells <br /> ■ Groundwater samples were collected from 21 of the 24 site-related monitoring wells <br /> The samples were submitted and analyzed for benzene,toluene, ethylbenzene and <br /> xylenes (BTEX), and total petroleum hydrocarbons-as-gasoline (TPH-G) <br /> Groundwater Monitoring Data <br /> Groundwater monitoring was conducted on June 6, 1995 The wells were gauged to determine DTW <br /> and to check for the presence of separate-phase hydrocarbons (SP) The wells were monitored using <br /> an INTERFACE PROBE TI Well Monitoring System, which uses a dual optical sensor/conductivity probe <br /> to distinguish between water and petroleum products A potentiometnc surface map was generated <br /> using data from top of casing elevations and DTW measurements (Figure 2) <br /> L� 41334385 rpt(STHL 6 1) <br /> Offrrc s throughout the 1 S (anuria and 0i occas <br />