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MEMORANDUM <br /> TO: RON ROWE <br /> FROM: MARGARET LAGORIO <br /> DATE: DECEMBER 2, 1998 <br /> RE: 2409 MAIN STREET, STOCKTON <br /> The information gathered to date on this site is limited. Soil and groundwater <br /> contamination has been documented. Depth to groundwater has fluctuated at <br /> this site. The depths to groundwater during the operation period of the former <br /> UST's should be established. Investigation of soil and groundwater to the lowest <br /> depth of groundwater at a minimum should be performed. <br /> It has been our agencies policy to require groundwater samples and selected soil <br /> samples to be analyzed for the five oxygenates since September 1997, by EPA <br /> Method 8260. At the last unit meeting a letter from DTSC was distributed stating <br /> that EPA Method 8240 was also acceptable. <br /> As we discussed earlier continuous core drilling and preparation of cross <br /> sections are recommendations. Sufficient site information must exist to justify <br /> the cost of requiring this work. You can indicate in writing that this may be <br /> required in the future so you recommend they do it now. <br />