Laserfiche WebLink
C A M B R i A Date June 24, 2005 <br /> Quarter 2"d Quarter 2005 <br /> OLYMPIAN QUARTERLY GROUNDWATER MONITORING REPORT <br /> Fund Claim No 12820 Address 1022 Frontage Road, Ripon, California <br /> Consulting Co/Project Manager Cambria Environmental Technology Inc/Brandon Wilken <br /> Consulting Co Project No 165-1556 <br /> Primary Agency/Regulatory ID No San Joaquin County Environmental Health Division/ <br /> Site Code 1604 <br /> WORK PERFORMED THIS QUARTER (SECOND- 2005)- <br /> 1 Performed second quarter groundwater monitoring and sampling activities on May 4, 2005 <br /> 2 Submitted quarterly groundwater monitoring report for second quarter 2005 <br /> 3 Submitted work plan for additional site assessment and feasibility testing <br /> WORK PROPOSED FOR NEXT QUARTER (THIRD — 2005). <br /> 1 Perform quarterly groundwater monitoring and sampling for third quarter 2005 <br /> 2 Prepare and submit quarterly groundwater monitoring report for third quarter 2005 <br /> 3 Perform site assessment and feasibility testing activities upon work plan approval <br /> QUARTERLY MONITORING: <br /> Current Phase of Project Monitoring and assessment <br /> Frequency of Groundwater Monitoring Quarterly <br /> Is Free Product (FP) Present on Site No <br /> Current Remediation Techniques Natural Attenuation <br /> Average Depth to Groundwater 23 32 ft below ground surface <br /> Groundwater Flow Direction and <br /> Gradient West-northwest, 0 0007 ft/ft <br /> DISCUSSION. <br /> Groundwater levels measured on May 4, 2005 indicate that groundwater beneath the site flows <br /> toward the west-northwest at a gradient of approximately 0 0007 ft/ft Groundwater flow <br /> direction has fluctuated since groundwater monitoring began in August 1999 Groundwater <br /> elevation contours are shown on Figure 2 <br /> Groundwater samples were analyzed for total petroleum hydrocarbons as diesel (TPHd) and total <br /> petroleum hydrocarbons as gasoline (TPHg) by modified United States Environmental Protection <br /> Agency (EPA) Method 8015C, benzene, toluene, ethylbenzene, and xylenes (BTEX) by EPA <br /> Method 802113, and methyl tertiary-butyl ether (MTBE), tertiary-amyl methyl ether (TAME), <br /> tertiary butyl alcohol (TBA), and 1,2-dichloroethane (1,2-DCA) by EPA Method 8260B <br /> • TPHd was detected in wells MW-9 and MW-1 at concentrations of 320 micrograms per liter <br /> (Itg/L) and 66,000 �ig/L, respectively TPHg and benzene were detected in well MW-1 <br /> at concentrations of 320 µg/L and 2 6, respectively MTBE was detected in wells MWA and <br /> MW-9 at concentrations of 960 }tgd_ A summary of groundwater analytical results is presented <br /> H\01ympoan122502 South Hwy 99 Ripon1QM12Q 0512Q 05 QMR doe <br />