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JM Equipment page 2 <br /> 1245 W. Charter Way May 12, 2009 <br /> Stockton, CA 95206 <br /> The EHD also reviewed the First Quarter 2009 quarterly monitoring report dated <br /> March 27, 2009. Recommendations included in the report requested that the <br /> unimpacted monitoring wells MW-1, 2, 3, 7, 10, and 109 have their sampling <br /> frequency reduced to once every two years, during the fourth quarter, starting <br /> 2010 and the usually impacted contaminated wells MW-4, 5, 6, 8, and 9 have <br /> their sampling frequency reduced to twice a year, during the second and fourth <br /> quarters, starting second quarter 2009. All the monitoring wells are to be <br /> sampled for benzene, toluene, ethylbenzene, and xylene (BTEX), total petroleum <br /> hydrocarbons as gasoline (TPHg), and methyl-tert butyl ether (MtBE). The <br /> recommendations are adequate and approved. <br /> Please be aware that the California Code of Regulations, Title 23, Section 2652 <br /> requires owners of contaminated underground storage tank sites to report <br /> quarterly on the status of their site to the lead regulatory agency overseeing the <br /> investigation. The report must include an update on specific information and <br /> results of all corrective action (investigation) which has occurred during the <br /> period. An item that must be discussed in each quarterly report is future <br /> investigative actions and a time schedule for implementing the actions. This <br /> letter type quarterly report is due on Geotracker every quarter that the semi <br /> annual and biennial reports are not submitted. You may prepare this report <br /> yourself unless geologic or engineering interpretations are included which would <br /> require that it be prepared by an appropriately registered professional. <br /> If you have any questions, you may contact Michael Infur�na, at (209) 468-3454. <br /> Michael J. Infurna XJrR6 Nuel C. Henderson Jr., PG <br /> Registered Environmental Health Specialist Engineering Geologist <br /> cc: Mr. James L. Barton, CVRWQCB - 11020 Sun Center Dr., #200 Rancho <br /> Cordova, CA 95670 <br /> Mr. Mark Owens, SWRCB-CUF, P.O. Box 944212 Sacramento, CA <br /> Mr. Raymond Kablanow, Geological Technics — 1101 7th St., Modesto, CA <br /> 95354 <br />