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14- 2-02; 75: 72 ;HERUM, CRABTREE, ;2094727986 .# 2/ 2 ` <br /> y 1 <br /> J <br /> A t t o r n e y s A t L a w <br /> Jeanne X Zotezzi <br /> izolezzifherumcrabtree.coai <br /> February 14,2002 <br /> VIA FACSIMILE <br /> Ms.Margaret Lagorio <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> Post Office Box 2009 <br /> Stockton,California 95201-2009 <br /> Re: City Ripon/Shell Clean-up Site code: 506186)Rinon/Shell Clean-up(SJCEHD Site code• 506186) <br /> Dear Margaret: <br /> I have reviewed the February 7,2002 Groundwater Monitoring Report-Fourth Quarter 2002 <br /> prepared by Cambria Environmental Technology,Inc.for the Ripon shell station on behalf of the City of <br /> Ripon. <br /> As you know from our past discussions and correspondence,Monitoring Well 6 has been serving <br /> as a"sentry"well to provide the County and the City with advance warning if MTBE concentrations were <br /> moving off-site toward Municipal Well 7 located only 1,300 feet east of the site. Until results from the <br /> fourth quarter 2001 monitoring,Well 6 had been at non-detectable limits for MTBE in both the shallow <br /> and deep groundwater zones. <br /> The Fourth Quarter 2001 Monitoring Report,however,reveals for the first time a level of MTBE <br /> of 1.1 ug/l in the deep groundwater zone. This is very troubling to the City of Ripon,and this result must <br /> be explained and addressed by Cambria. <br /> It is our understanding from Cambria's letter that the first quarter 2002 sampling event took place <br /> in January,and that they would expedite the turn around time for the quarterly monitoring report and <br /> would include recommendations as to whether the GWE system should remain shut down or be restarted'. <br /> On behalf of the City,I would request that your office direct Cambria to also include in that report a <br /> discussion of the continuing value of MW 6 as a sentry well,a discussion of the MTBE results in that <br /> well,and its recommendations for further actions to protect Municipal Well 7,as well as to provide an <br /> early deadline for submission of the First Quarter 2002 Monitoring Report. <br /> e truly yours, <br /> J ANNE <br /> Attorney-at- aw <br /> JMZ:rI <br /> cc: Mr.Leon Compton <br /> F:\documents\1084-100\JMZ\19818.doc <br /> 2291 Wes+Mnecll Lane Sui+e Bi 00 S+ocic+on, CA 95207 <br /> • Te.l 209.472.7700 • Fax 209.472.7986 • JVlodes+o"Tel. 209.525.8444 <br /> Professional Corporation <br />