Laserfiche WebLink
y a r f i <br /> GETTLER - RYAN INC. <br /> February 26, 1999 <br /> G-R Job #280047 <br /> Mr Robert A Boust <br /> Unocal - DBGIAMG <br /> 2121 North California Boulevard, Suite 250 <br /> Walnut Creek, California 94596 <br /> RE Fourth Quarter 1998 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 <br /> Inc (G-R) On December 14, 1998, field personnel monitored and sampled six wells (U-1 through U-6) at the <br /> above referenced 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 to the wells Static water level data and <br /> groundwater elevations are summarized 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 are also attached The samples were <br /> analyzed by Sequoia Analytical Analytical results are summarized to Tables 1 through 4 A Concentration <br /> Map is included as Figure 2 The chain of custody document and laboratory analytical reports are also attached <br /> Sincerely, <br /> AC1 _C0 ��p f� <br /> aaaM.'a�idijng' <br /> Protect Coordinator Q� 991% S� <br /> CO 9 <br /> No 5577 <br /> Stephe J Cart r <br /> Senior Geologist, R G No 5577 tP �Q <br /> Figure 1 Potentiometnc Map 9�F01FZ CAL��OQ <br /> Figure 2 Concentration Map <br /> Table 1 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 <br /> Field Data Sheets <br /> Chain of Custody Document and Laboratory Analytical Reports <br /> 0123 ym] <br /> 6747 Serra Court , Suite J • Dublin , California 94568 ( 925 ) 551 - 7555 <br />