Laserfiche WebLink
' ffT CorPoratioaa <br /> 4005 Port Chicago Highway <br /> Concord, CA 94520 1120 <br /> ' 7(3 925 288 9898 <br /> 41he Fax 925 288 0888 <br /> l <br /> (4r1*0UP. <br /> A Aff rnbf r of The 11 Group <br /> ' July 9, 2001 <br /> Mr Bob DeNinno <br /> 7-Eleven, Ince <br /> 10220 SW Greenburg Road, Suite 470 <br /> Portland, Oregon 97223 <br /> Subject Second Quarter 2001 Monitoring and Sampling Report <br /> 7-Eleven Store No 14117 <br /> ' 2725 Country Club Boulevard <br /> Stockton, California <br /> IT Project No 779966 cJ► -� <br /> r- <br /> Dear Mr DeNinno <br /> This Second Quarter 2001 Monitoring and Sampling Report presents the results of activities performed by <br /> ' the IT Corporation at the subject site (Figure 1, Attachment 1) on May 23, 2001 A summary of activities <br /> conducted during this reporting period is provided below <br /> a Depth to water(DTW)was gauged in four site-related groundwater monitoring wells (MW-1 <br /> through MW-4) <br /> Groundwater samples were collected from the groundwater monitoring wells and submitted to <br /> ' a California-certified laboratory for analysis for benzene,toluene, ethylbenzene and xylenes <br /> (BTEX),total petroleum hydrocarbons-as-gasoline (TPH-G), and the oxygenates, methyl-tert- <br /> butyl-ether(MTBE),tent-butanol (TBA), dnsopropyl ether(DIPS),ethyl-tert-butyl ether(ETBE), <br /> ' and tert-amylmethyl ether(TAME) <br /> Groundwater Monitoring Data <br /> ' Before monitoring,the well caps were opened to allow the water in each well to stabilize to atmospheric <br /> pressure The DTW was measured to the nearest 0 01 foot from the top of the well casing using an <br /> 1 interface probe Quarterly results and historical data are presented in Table 111A, respectively A <br /> potentrometnc surface map was generated using quarterly top of casing elevations and DTW data (Figure <br /> ' 2) Based on the monitoring data,the estimated groundwater flow is wes+ ter!4at a gradient of about 0 0025 <br /> foot per foot Field data sheets are included in Attachment 3 <br /> 0 <br /> ' 14117412 RPT <br /> 1 <br />