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WFS, VERNALIS <br />-2- <br />ammonia, and the scans 8010, 8080, and 504. As shown in Attachment 1, other chemicals have <br />been found at concentrations exceeding levels of concern. Therefore, the samples also need to <br />be analyzed by EPA 632 and 8140. In addition, please request that the lab include the chemicals <br />1,2,3-trichloropropane and EDB on the 8010 screen. <br />4. Within 90 days of the off-site CPT field work, please submit a report documenting the results. <br />The report should include the items listed in #2, above, and a workplan for the delineation of the <br />lateral and vertical extent of groundwater contamination. <br />Please continue to keep me informed as to your schedule for the CPT work. If you have any <br />questions, I can be reached at (916) 255-3104. <br />jo <br />WENDY WYELS <br />Agricultural Unit <br />Enclosure <br />cc: Ms. Karen Streich, GeoSyntec Consultants, Walnut Creek <br />Mr. Frank Fossati, Shell Oil Products, Santa Ana <br />Mr. Fred Strauss, Western Farm Service, Vernalis <br />S. Sasson, San Joaquin County Environmental Health, Stockton <br />