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Mr Harlin Knoll <br /> Page 4 of 4 <br /> • RECOMMENDATIONS <br /> Based upon the findings included herein, Ground Zero makes the following recommendations <br /> 1 Monitor the status of known ozone injection systems within San Joaquin County to evaluate its <br /> effectiveness at sites with similar soil conditions <br /> 2 Request a meeting at the site with City of Stockton Public Works/Permits Department to discuss <br /> the feasibility of installing a downgradient groundwater monitoring well through the sidewalk on <br /> the east side of Pacific Avenue <br /> 3 Based upon the overall decrease in contaminant concentrations over the last 6-8 years, revise the <br /> groundwater monitoring schedule to include seri-annual sampling of site wells This revised <br /> schedule would effectively reduce the sampling frequency of wells MW1, MW4, and MW5 from <br /> quarterly to semi-annually and increase the sampling frequency of well MW2 from annually to <br /> semi-annually The sampling frequency of well MW3 would remain unchanged <br /> Please contact John Lane at (209) 838-9888 if you have any questions or comments regarding this <br /> report <br /> Respectfully, <br /> Ground Zero Analysis, Inc <br /> • � <br /> 0- <br /> cc <br /> .i0r'N P <br /> ean Garvey G LAN"c o <br /> Staff Geologist No 6795 <br /> NA <br /> QF C <br /> John P Lane <br /> CA Registered Geologist 6795 <br /> Attachments <br /> cc Mr Carl Knowles <br /> Mr Patrick D Riddle, Attorney at Law <br /> Mr Marty Hartzell, CRWQCB Sacramento <br /> G\Data\GROUNDZE\KNOWLES HAM\RSP0RT3\QMR\3QM2002 doc <br />