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,ESE <br />ENVIRONMENTAL SCIENCE <br />AND ENGINEERING, INC. <br />August 7, 1985 <br />J-87-913-0100 <br />McSITZ <br />aD <br />AUG 10 1997 <br />ENVIROM£NTAL HEALTH <br />PERMIT/SERVICES <br />Ms. Laurie Cotulla <br />San Joaquin Local Health Department <br />P.O. Box 2009 <br />Stockton,CA 95201 <br />Dear Ms. Cotulla: <br />Please find attached copies of the most recent round of <br />sampling data for the Rainbo Baking Facility, Stockton, <br />California. - <br />As I discussed with your secretary today, we are proposing to <br />make some changes with respect to the -installation of the next <br />two wells as follows: <br />1. Drill two soil borings through a.maximum depth of 55 feet. <br />or ten feet into water table (whichever occurs first) <br />using hollow stem technique; <br />2. Collect two soil samples from each boring, one directly <br />above and one directly below the water table. If a <br />discernible water table is not encountered during <br />drilling operations, soil.samples will be collected from <br />depths of 50 and 55 feet in each boring; <br />3. Perform laboratory analysis of four soil samples for <br />total petroleum hydrocarbons, benzene, toluene, xylene, <br />and organic lead; <br />4. Complete each boring as a_2 -inch diameter monitor wells <br />with screen set to intercept floating product; <br />5. Perform laboratory analysis of two ground water samples <br />for total petroleum -hydrocarbons, benzene, toluene, <br />xylene; and organic lead, and <br />6. Complete report -and make recommendation. <br />4740 Northgate Blvd., Suite 150 Sacramento, California95834 916/924-5997 <br />