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l r� <br /> � a <br /> FLUOR DANIEL GTI <br /> tJulY 9, <br /> ' Mr Bob DeNinno <br /> The Southland Corporation <br /> 10220 S W Greenburg Road, Suite 470 <br /> ' Portland,Oregon 97233 <br /> Subject Second Quarter 1998 Mondonng and Sampling Report <br /> Former Southland Store No 20632 <br /> ' 4627 Davina Drive <br /> Stockton,California <br /> Fluor Daniel GTI Project 102483 <br /> ' Dear Mr DeNinno <br /> This Second Quarter 1998 Monitoring and Sampling Report presents the results of monitoring and <br /> ' sampling activities performed by Fluor Daniel GTI, Inc (Fluor Daniel GTI)at the subject site (Figures 1 <br /> and 2,Attachment 1)on June 15, 1998 A summary of activities conducted during this reporting period is <br /> provided below <br /> ' ■ Depth to water(DTW)was gauged in four site-related groundwater monitoring wells, MW-1 through <br /> MW-4 <br /> a Groundwater samples were collected from the four monitoring wells and submitted to a <br /> Caldomia-cerfified laboratory for analysis of benzene,toluene, ethyibenzene and natal xylenes (BTEX), <br /> ' total petroleum hydrocarbons-as-gasoline(TPH-G),and the oxygenates methyl-tert-butyl-ether <br /> (MTBE),tert-butanol (TBA),ditsopropyl ether(DIPS), ethyl-tort-butyl ether(ETBE), and tart-amyl- <br /> methyl ether(TAME) <br /> ' Groundwater Monitoring Data <br /> ' Groundwater monitoring of the four wells was performed on June 15, 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 potenbjometric surface map was prepared using the groundwater elevation data collected on <br /> ' June 15, 1998 (Figure 2). No separate-phase hydrocarbons(SP)were observed in the four groundwater <br /> monitoring wells during this monitoring event. Based on the groundwater elevation data,groundwater flow <br /> k toward the southwest at a gradient of 0 002 ftfft. The groundwater monitoring results from the June 15, <br /> ' 1998 monitoring and sampling event and historical monitoring results are presented in Table 1 (Attachment <br /> 2) Field data sheets are Included In Attachment 3 <br /> 757 Arnold Drive, Suite D / Martinez, CA 94553 USA (510) 370-3990 FAX (5 10) 370-3991 <br /> t C� <br />