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1 <br /> INC.6ETTLER - RYAN <br /> October 27, 2000 <br /> G-R Job#280045 <br /> Mr Nick Nickerson <br /> Unocal -DBGIAMG <br /> 8788 Elk Grove Boulevard <br /> Building 3, Suite 15 <br /> Elk Grove,California 95624 <br /> RE Third Quarter 2000 Groundwater Monitoring&Sampling Report <br /> Former Unocal Service Station#0187 <br /> 437 East Miner Avenue <br /> Stockton,California <br /> Dear Mr Nickerson <br /> This report documents the quarterly groundwater monitoring and sampling and well development events performed <br /> by Gettler-Ryan Inc (G-R) On August 31 and September 1, 2000, field personnel monitored twenty wells (U-1 <br /> through U-13,UV-1,NP-1-22,NP-1-65, NP-1-111, NP-2-22,NP-2-60, and NP-2-116) and sampled nineteen wells <br /> (U-1 through U-13,NP-1-22,NP-1-65,NP-1-111,NP-2-22, NP-2-60, and NP-2-116) at the above referenced 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 l through 5 A Concentration Map is included as Figure 2 <br /> Chain of custody documents and laboratory analytical reports are also attached <br /> Sincerely, <br /> LW" <br /> A'7� - �?rt'QlL <br /> —tae U C�'�1 <br /> Deanna L HardingJ <br /> Project Coordinator <br /> ca <br /> No.5577 <br /> tephen Carter t'�. ! <br /> Senior Geologist,R G No 5577 9 p <br /> OF CALF � <br /> Figure i Potentiometric Map <br /> Figure 2 Concentration Map <br /> Table 1 Groundwater Monitoring Data and Analytical Results <br /> Table 2 Groundwater Analytical Results-Oxygenate Compounds <br /> Table 3 Groundwater Analytical Results <br /> Table 4 Groundwater Analytical Results <br /> Table 5 Groundwater Analytical Results <br /> Attachments Standard Operating Procedure-Groundwater Sampling <br /> Field Data Sheets <br /> Chain of Custody Document and Laboratory Analytical Reports <br /> 0187 qml <br /> 7 Sierra Court , Suite J • Dublin , California 94568 ( 925 ) 551 - 7555 <br />