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IT Corporation <br /> 757 Arnold Drive, Suite D <br /> Martinez, CA 94553-6526 <br /> Tel 925 370 3990 <br />;DiheA Fax 925 370 3991 <br /> , OUP A Member of The IT Group <br /> JL <br /> sv <br /> March 1 <br /> 9, 1999 <br /> MAR 2 5x999 <br /> Mr Bob DeNinno CNV <br /> B <br /> SouthlandNT <br /> The W Greenburg Road, Suite 470 P RIVjI S RVICFS <br /> �'��rH <br /> 102 0 S <br /> Portland, OR 97233 <br /> Subject First Quarter 1999 Monitoring and Sampling Report <br /> Southland Store No 19976 <br /> 1399 North Main Street <br /> Manteca, California <br /> Project 779956 - <br /> Dear Mr ❑eNlnno <br /> This First Quarter 1999 Monitoring and Sampling Report, and Work Plan for Additional Subsurface <br /> Investigation presents the results of monitoring and sampling activities performed by IT Corporation <br /> (formerly Fluor Daniel GTI) at the subject site(Figures 1 and 2,Attachment 1) on February 18, 1999 A <br /> summary of activities conducted during this reporting penod is provided below <br /> ■ Depth to water(DTW) was gauged in four site-related groundwater monitoring wells (MW-1, MW- <br /> 1 A, <br /> W-1A,MW-2 and MW-3) <br /> ■ Groundwater samples were collected from the four monitoring wells and submitted to a California- <br /> certified laboratory for analysis of benzene,toluene, ethylbenzene and total xylenes(BTEX),total <br /> 1 petroleum hydrocarbons-as-gasoline (TPH-G), methyl-tert-butyl-ether(MTBE),tert-butanol (TBA), <br /> diisopropyl ether(DIPE), ethyl-tert-butyl ether(ETBE), and tent-amylmethyl ether(TAME) <br /> 1 GROUNDWATER MONITORING DATA <br /> Groundwater monitoring of the four wells was performed on February 18, 1999 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 PROBErm Well Monitoring System <br /> 1 A potentiometric surface map was prepared using the groundwater elevation data collected on February <br /> 18, 1999 (Figure 2) Based on the groundwater elevation data, groundwater flow is toward the northwest at <br /> a gradient of approximately 0 001 ft/ft Groundwater monitoring results from February 18, 1999 and <br /> previous monitoring and sampling events are presented in Table 1 Field data sheets are included in <br /> Attachment 3 <br /> h <br />