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Nk. William J. Nlarshall <br />Page 2 <br />August 29, 1994 <br />reported to the City, if any ? <br />b. At what depth was the sample(s) taken ? <br />2. What kind of sample containers were used and what cleaning procedures were used <br />to be sure the containers were clean ? <br />3. Was the well purged before sampling ? If so, what purging procedures were used ? <br />I <br />4. How were the sample(s) preserved after they were collected ? <br />5. Was a Chain -of -Custody Record kept to document possession and transfer of the <br />sample(s) ? <br />6. What were the laboratory quality assurance procedures ? Were method blanks, <br />surrogate spike recoveries, matrix spike recoveries, and matrix spike duplicates <br />analyzed ? <br />7. Were verification of results samples taken, and, if so, what were the results of such <br />verification samplings. <br />Can you or the State Office of Real Estate and Design Services provide us with field <br />sampling documentation and laboratory quality control/quality assurance documentation <br />that may answer these questions ? <br />eTE HEN CHEN <br />DEPUTY PUBLIC WORKS DIRECTOR, SOLID WASTE <br />SC/MM <br />cc: Dwane Milnes, City Manager <br />Gary Ingraham, Assistant City Manager <br />James B. Giottonini, Public Works Director <br />Bart Thiltgen, Deputy City Attorney <br />Mike Miller, Solid Waste Manager <br />Elden E. Fillion, State Office of Real Estate and Design Services <br />Karen Patche, State Office of Real Estate and Design Services <br />Jerry Noma, Northern California Youth Center <br />Steve Rosenbaum, Regional Water Quality Control Board <br />