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N, <br /> C A M B RIA <br /> detected in all three wells, at concentrations ranging from 32 to 530 parts per billion (ppb) <br /> and 1 4 to 45 ppb, respectively No other fuel oxygenates or lead scavengers were detected <br /> Cambria recommends continued quarterly monitoring and sampling to establish the <br /> predominant groundwater flow direction beneath the site and to monitor the oxygenate <br /> concentrations in groundwater As proposed in our July 3, 2000 Response Letter/Site <br /> Investigation Work Plan, Cambria also recommends assessing the vertical and lateral extent <br /> of petroleum hydrocarbons and oxygenates by drilling onsite cone penetration test borings <br /> Cambria is prepared to implement this work plan upon receiving approval from <br /> SJCPHS/EHD <br /> CLOSING <br /> If you have any questions regarding the contents of this document, please call Aubrey Cool at <br /> (707) 933-2368 <br /> Sincerely, <br /> Cambria Environmental Technology, Inc <br /> Lisa Summers _ <br /> Staff ScientistpW Ep�o <br /> 5�e� tiF C� <br /> p Ja <br /> )be"W Neely, RG <br /> Senior Project Geologist No 6427 ° <br /> RG 6927 \� <br /> Attachments OF��-���� <br /> Table I Additional Groundwater Analytical Data <br /> Figure 1 Site Vicinity Map <br /> Figure 2 Groundwater Contour/Chemical Concentration Map <br /> Appendix A Blaine Tech Services, Inc -- Groundwater Monitoring Report <br /> cc Ms Karen Petryna, Equiva Services LLC <br /> Mr Marty Hartzell, Central Valley Regional Water Quality Control Board <br /> • <br /> 0955 2 <br />