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GeoStrategies Inc. <br /> V 2140 WEST WINTON AVENUE <br /> HAYWARD,'CALIFORNIA 94545 (510)352-4800 <br /> July 10, 1992 : ... <br /> Unocal, Corporation <br /> P:0. .Box 5155 <br /> San Ramon, California_ 94583 - <br /> -ttn: ; Ms:.Penny, L .'Silzer <br /> Re: ff ARTERLY MONITORING REPORTl: . <br /> Unocal Bulk,Plant No .078-8 ` <br /> N�8203 East 11th Street <br /> Tracy, California <br /> Ms.- Silzer <br /> This Quarterly Monitoring "Report has w been prepared,by; _GeoStrattegies Inc. (GSI) <br /> ` and presents: the results of the1992_second <br /> q <br /> 99.- --_...c _ r sampling far <br /> quarter the 'above. <br /> ,referenced.site <br /> There are currently s x monitoring wells at the site; "Wells U-1 through U- <br /> (Plate"2) These swells were ;'installed between 1990 `and X991.. by Pacific <br /> 4 Environmental- Group, Inc.. <br /> CURRENT.,QUARTER SAMft—G RE5I I;TS. <br /> Depth to water. measurements were obtained'- in each monitorin well.Znlvf�ay�$ <br /> 1992. Static round-water levels were measured;.-from--.the surveyed o of the <br /> _._. <br /> well .box and_`recorded to' the nearest +0:.01 ,foot. �Water=level .elevations were <br /> referenced, to Mean Sea Level;. (MSL) ,,"datum; :and:."are-:presented`..in Table 1. <br /> Water-level d"a-ta were used to >:const'ruct "."a ,quarterly :pottentiometric. map (Plate_ <br /> =3). Shallow 'ground:water ,'floW ,direction is to.. the north with an approximate <br /> . �raulic radien� f �4. <br /> ; . <br /> �—�--�- <br /> ` -Bach well .Was. checked.for the; presence :of floating product.. Floating product <br /> j Was not't�bserved;in: the. Wells`this. quarter,.: <br /> j <br /> 784'601"=1 <br />