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iā‘0© GROUNDWATER <br /> DLE1TECHNOLOGY, INC. 4057 Port Chicago Highway,Concord CA 94520(415)671-2387 <br /> FAX (415)685-9148 <br /> June 30, 1994 Project No 02010 4237 <br /> Mr Brett Hunter <br /> Chevron U S A Products Company <br /> 2410 Camino Ramon <br /> San Ramon, CA 94583-0804 <br /> SUBJECT Quarterly Monitoring and Sampling Activities <br /> Former Chevron Service Station No 9-6465 <br /> 5608 North Pershing Avenue <br /> Stockton, California <br /> Dear Mr Hunter <br /> Groundwater Technology, Inc presents the quarterly groundwater monitoring and sampling data <br /> collected on June 2, 1994 Three groundwater monitoring wells were gauged to determine depth to <br /> ā€¢ groundwater (DTW) and to check for the presence of separate-phase petroleum hydrocarbons <br /> Separate-phase hydrocarbons were not detected in the monitoring wells A potentiometnc surface <br /> map and a summary of groundwater monitoring data are presented in Attachments 1 and 2 <br /> respectively After measuring DTW the monitoring wells were purged and sampled Groundwater <br /> monitoring and sample collection protocol and field data sheets are presented in Attachment 3 <br /> The groundwater samples were analyzed for benzene, toluene, ethylbenzene, xylenes and total <br /> petroleum hydrocarbons-as-gasoline Laboratory reports and chain-of-custody records are included <br /> in Attachment 4 Monitoring well purge water was transported by Groundwater Technology to the <br /> Chevron Terminal in Richmond, California, for recycling <br /> Groundwater Technology, Inc is pleased to assist Chevron on this protect_ If you have any <br /> questions or comments please call our Concord office at (510) 671-2387 <br /> Sincerely, <br /> Groundwater Technology, Inc <br /> Written/Submitted by <br /> Kenneth P J nson <br /> Project Manager <br /> PR <br /> Attachment 1 Figure For <br /> Attachment 2 Table Wendell W Lattz <br /> Attachment 3 Protocol and Field Data Sheets Vice President, General Manager <br /> Attachment 4 Laboratory Report West Region <br /> QMasR <br /> Offices throughout the US Canada and Overseas <br />