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4, <br /> r <br /> GETTLER - RYAN INC. <br /> June 18, 1998 Job #512180 <br /> Mr Brett Hunter <br /> Chevron Products Company <br /> P O Box 6004 <br /> San Ramon, CA 94583 <br /> Re Second Quarter 1998 Groundwater Monitoring SL Sampling Report <br /> Chevron Service Station #9-6171 <br /> 6633 Pacific Avenue <br /> Stockton, California <br /> Dear Mr Hunter <br /> This report documents the quarterly groundwater monitoring and sampling event performed by Gettler-Ryan <br /> Inc (G-R) On May 10 and 11, 1998, field personnel were on-site to monitor and sample seven wells (MW-2 <br /> through MW-7 and OW-1) at the above mentioned site <br />• Static groundwater levels were measured and all wells were checked for the presence of separate-phase <br /> hydrocarbons Separate-phase hydrocarbons were not present in any of the wells Static water level data and <br /> groundwater elevations are presented in Table 1 A Potentiometric Map is included as Figure 1 <br /> Groundwater samples were collected from the monitoring wells as specified by G-R. Standard Operating <br /> Procedure - Groundwater Sampling (attached) The field data sheets for this event are also attached The <br /> samples were analyzed by Sequoia Analytical Analytical results are presented in Tables I, 2 and 4 The chain <br /> of custody document and laboratory analytical reports are enclosed <br /> Thank you for allowing Gettler-Ryan Inc to provide environmental services to Chevron Please call if you have <br /> any questions or comments regarding this report <br /> cerely, <br /> Deanna L. Harding <br /> Project Coordinator �Gj� n <br /> Barbara Sierrunski ` <br /> Project Geologist, RG No 6676 (PNo. 6676 <br /> DLK S;Qdih <br /> 9 <br /> 5121 QN& OF CA1-�F�� <br /> J <br /> 6747 Sierra Court , Suite J • Dublin California 94968 1 - 7FF � <br />