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Y KA1b ANAL <br /> 1221 Fast Main Street Chattanooga, TN 37408-1696 <br /> (613)733-9330 <br /> i <br /> May 1, 1987 <br /> Mr . Gary Johnson <br /> MAYO <br /> Central Valley Region ENVIROMENTAL H ALIH <br /> Regional Water Quality Control Board FERMIT/SEKVICLS <br /> 3443 Routier Road <br /> Sacramento, CA 95827 <br /> RE: Site Assessment Activities at <br /> Douglas Station <br /> 900 South Cherokee Lane <br /> Lodi, CA <br /> Dear Mr . Johnson: <br /> This letter is written to summarize our meeting on May 14, 1987 <br /> regarding the Douglas Station at 900 South Cherokee Lane, Lodi <br /> and to propose the next phase of activities at the site . <br /> As we discussed, GMS and Associates was hired to review the <br /> existing data for the station and prepare a comprehensive site <br /> assessment report tying together all the previously collected <br /> data. After completing their review, GMS was unable to prepare <br /> a report because of inconsistencies they found in the data. <br /> For example, a definite groundwater gradient could not be <br /> determined and drill hole logs could not be correlated from one <br /> drilling episode to another . The result of GMS 's first efforts <br /> was a list of recommendations aimed at getting the project back <br /> on track and ultimately providing a subsurface environmental <br /> assessment of the contamination. The GMS recommendations, <br /> dated December 28, 1986, are attached for your review. <br /> So far, Kayo has completed Task I and is preparing to proceed <br /> with Task II . The GMS reports (dated March 19, 1987 and April <br /> 21, 1987 ) describing the results of Task I and making <br /> recommendations f,ox well abandonment are attached for your <br /> review. The results of Task I was also discussed in your <br /> office on April 14 . <br /> The electric logging conducted in Task I confirms that several <br /> of the monitoring wells were improperly constructed and may <br /> have allowed cross-contamination from a dry silty sand across a <br /> barrier zone to a lower water bearing sand . These wells may <br /> also be causing confusion in determining the groundwater <br /> gradient. <br /> GMS 's approach to groundwater contamination problems is to <br /> first understand the geology and hydrology of the site and then <br /> proceed with determining the extent of the contamination. As a <br /> result, they have recommended that we plug and abandon the <br /> problem wells identified in their April 21, 1987 report before <br /> proceeding with additional site assessment work . <br />