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' r t <br /> .. ♦ S r - ; _ G t � M1i ,., r w , _ _ - `- , S 'r - . � Y -. ✓✓p{y r L <br /> 6ETTLERRYAN- INC. <br /> July 24, 2000 _ <br /> • G-R Job#280047 <br /> Mr Robert A Boust <br /> Unocal -DBG/AMG <br /> 2121 North California Boulevard, Sutte 250 w - <br /> Walnut Creek, California 94596 <br /> RE Second Quarter 2000 Groundwater Monitoring &Sampling Report <br /> Former Unocal Service Station#0123 _ <br /> 1034 Central Avenue <br /> Tracy, California _ <br /> Dear Mr Boust <br /> - This report documents the quarterly groundwater monitoring and sampling event performed by Gettler-Ryan Inc <br /> (G-R) On June 19, 2000, field personnel monitored and sampled six wells(U-1 through U-6)at the above referenced - <br /> -site - <br /> Static groundwater levels were measured and all wells were checked for the presence of separate-phase hydrocarbons <br /> Separate-phase hydrocarbons were not present in the wells Static water level data and groundwater elevations are <br /> summarized in Table 1 A Potentiometnc Map is included as Figure 1 <br />. Groundwater samples were collected from the monitoring wells as specified by G-R Standard Operating Procedure <br /> -Groundwater Sampling(attached) The field data sheets are also attached The samples were analyzed by Sequoia <br /> Analytical Analytical results are summarized in Tables i through 4 A Concentration Map is included as Figure 2 <br /> The chain of custodyi document and laboratory analytical reports are also attached <br /> S cerely, <br /> 6c�n <br /> i , <br /> B <br /> Deanna L Harding RED GE\cam'( S 4(� <br /> roJect Coordinator ��O�vG�-p` J �V, , <br /> r <br /> ' No. 6882 <br /> Dougl s J Lee _ <br /> ,Senior Geologist, R G No 6682 d'�q <br /> Figure 1 Potentiometnc Map TF OF CA�� O <br /> " Figure 2 Concentration Map P <br /> Table I Groundwater Monitoring Data and Analytical Results <br /> Table 2 -Groundwater Analytical Results <br /> Table 3 Groundwater Analytical Results- Oxygenate Compounds <br /> Table 4 Groundwater Analytical Results(EPA Method 8010) <br /> Attachments Standard Operating Procedure-Groundwater Sampling Field Data Sheets <br />• Chain of Custody Document and Laboratory Analytical Reports <br /> 0123 qml <br /> r <br /> r i <br /> 3 . <br /> 6747 Sierra Court , Suite J Dublin , California 94568 ( 925 ) 551 - 7555 <br />