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Mr Michael Infurna <br /> Page 3 <br /> CONCLUSIONS <br /> No target analytes have been detected in either well MW 1 or MW2 since sampling began <br /> Contaminant concentrations at the site appear to have a relationship to groundwater level fluctuation <br /> Analytical results in well MW3 from previous quarterly events showed a general reduction in <br /> contaminant concentrations as the water level at the site rose, and an increase in concentrations as the <br /> water level fell During this event, water levels at the site increased, and concentrations of TPHg and <br /> TPHd in well MW3 decreased,MTBE increased slightly, however <br /> RECOMMENDATIONS <br /> Groundwater flow at the site appears to periodically reverse between the directions of northwest <br /> and southeast Contaminant concentrations in well MW3, installed within the former tankplt, <br /> have shown no clear trend of increase or reduction but have remained relatively stable over a <br /> period of more than one year It may be necessary to install additional monitoring wells in order <br /> to delineate the downgradient extent of contamination Because of the periodic flow reversals, <br /> one well would need to be installed to the northwest of the former tankplt and another to the <br /> southeast If so directed, we will submit a workplan to install additional groundwater monitoring <br /> wells Should additional wells be installed it may be appropriate to reduce the sampling frequency <br /> . of cross-gradient wells MW and MW2 <br /> The next round of groundwater sampling 1s scheduled for May 2001 You will be provided with a <br /> nummum of 48 hours notice prior to conducting fieldwork If you have any questions or comments <br /> please contact Ground Zero at your convenience <br /> Respectfully, <br /> Gro d Zero alysls, Inc <br /> ey, <br /> C��c'��R�D GFD�oc <br /> 7-c� <br /> oglst ��" o� <br /> / GREGORY P. <br /> 4L S <br /> No.fAHL 5023 <br /> Gregory P Stahl,RG 5023 - <br /> CA Certified Hydrogeologist No 264 `ffq jF OF CAOE����Q <br /> Attachments <br /> cc Mr Norm Crum,Woolsey Oil, Inc <br /> Ms Karen Collins,Environmental Closures, Inc <br /> Mr Marty Hartzell, RWQCB <br /> Mr Richard McPherson, Property Owner <br /> wooiaey chllgmMgm2001 doe <br />