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i <br /> FLUOR DANIEL GTI <br /> October 2, 1998 <br /> ' Mr Bob DeNinno <br /> The Southland Corporation <br /> ' 10220 S W Greenburg Road, Suite 470 r-'AY IV,F s%k <br /> Portland OR 97233 to'T f <br /> i Subject Third Quarter 1998 Monitoring and Sampling Report NOV 1 Z 1998 <br /> Former Southland Store No 20632 s„ <br /> 'UrGOC LI_c <br /> 4627 DaVinci Drive "So nigh, ,L HFAL., <br /> Stockton,California <br /> Fluor Daniel GTI Project 102483 <br />' Dear Mr DeNinno <br /> This Third Quarter 1998 Monitoring and Sampling Report presents the results of monitoring and sampling <br />' acWties performed by Fluor Daniel GTI, Inc (Fluor Daniel GTI) at the subject site (Figures 1 and 2, <br /> Attachment 1) on August 25, 1998 A summary of actavires conducted during this reporting period is <br /> provided below <br /> ■ Depth to water(DTW)was gauged in three site-related groundwater monitoring wells, MWA <br /> through MW-3 <br /> = Groundwater samples were collected from the four monitoring wells and submitted to a <br /> California-certified laboratory for analysis of benzene,toluene, ethylbenzene, and total xylenes <br />' (BTEX),total petroleum hydrocarbons-as-gasoline (TPH-G), and the oxygenates methyl-tert- <br /> butyl-ether(MTBE),tert-butanol (TBA), diisopropyl ether(DIPE), ethyl-tert-butyl ether(ETBE), <br /> and tert-amyl-methyl ether(TAME) <br />' Groundwater Monitoring Data <br /> Groundwater monitoring of the four wells was performed on August 25, 1998 Before monitoring, the well <br />' caps were opened to allow the water in each well to stabilize to atmospheric pressure The DTW was <br /> measured to the nearest 0 01 foot from the top of the well casing using an ORS environmental Equipment <br /> INTERFACE PROBE' Well Monitoring System <br />' A potentiometric surface map was prepared using the groundwater elevation data collected on August 25, <br /> 1998 (Figure 2) No separate-phase hydrocarbons (SP)were observed in the groundwater monitoring <br />' wells during this monitoring event Based on the groundwater elevation data, groundwater flow is toward <br /> 757 Arnold Drive, Suite D / Martinez CA 94553 USA {925) 370 3990 FAX (925) 370-3991 <br /> t t1 <br />