Laserfiche WebLink
XI � <br /> n <br /> 19 <br /> GROUND ZERO ANALYSIS, INC •�0 0 �� 2 <br /> 1714 Main Stt ett <br /> Escalon,California 953204927 <br /> Telephone (209)838-9888 <br /> Facstmtlt, (209)838-9883 <br /> March 8, 2000 <br /> I <br /> Mr Michael Infurna <br /> San Joaquin County Public Health Services, <br /> Environmental Health Division <br /> 304 E Weber Ave, Tlurd Floor <br /> Stockton, CA 95202 <br /> Subject First Quarter 2000 Groundwater Monitoring and Sampling Report <br /> Woolsey Oil, Inc Cardlock, 1501 W Charter Way, Stockton, CA(site code 508175) <br /> Dear Mr Infilrna <br /> This letter report pi esents the results of the first quarter 2000 groundwater monitoring and sampling <br />• activities at the subject site (Flgui e 1) <br /> SITE ACTIVITIES <br /> Activities at the site included monitoling water level elevations, purging and sampling groundwater <br /> from site wells, and analyzing samples for total petroleum hydrocarbons as gasoline (TPHg), total <br /> petroleum hydrocarbons as diesel (TPHd), benzene, toluene, ethylbenzene, total xylenes (BTEX), and <br /> methyl let t butyl ether(MTBE) <br /> FIELD WORK <br /> Groundwater Monitot tng and Sampling <br /> On February 17, 2000 monitoring wells MWl through MW3 were monitored and sampled <br /> Groundwater elevations were calculated by measuring the depth to groundwater in each well and <br /> subtracting fe om the respective wellhead elevation Groundwater rose an average of 1 78 feet since <br /> last monitoi ed on November 22, 1999 Groundwater flow was to a northwesterly direction with a <br /> hydraulic gradient of approximately 0 027 ft/ft A potentlomewe surface map generated using the <br /> February 17, 2000 monitoring data is shown on Figure 2 Groundwater monitoring data are <br /> summarized in Table i Monitoring data sheets ale Included in Attachment A <br /> Prior to sampling, monitoring wells MW l thl ough MW3 were purged of at least five well casing <br /> volumes While pui ging, the physical pai ameters temperature, pH and electric conductivity were <br />'0 measured Samples were collected after stabilization of the physical parameters and after 100% water <br /> anolscy cht\qmr\1dm2000 due <br />