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I WO a�Ww <br /> t <br /> Mobil oil Corporation 7 W%',EST ALArAEOA AVENUE <br /> t3UABAMN.CAUFORNIA 915J 4331 <br /> September 16, 1991 <br /> Mr, Harlin Knoll MOBIL OIL CORPORATIOH <br /> FORMER SIS 10-HP4 <br /> San Jooquin Co. Public Health 2375 TRACY BOULEVARD <br /> Envires,.Imental Health Division TRACY.- CALIFORNIA <br /> 3.601 -,.ast Hazelton Avenue Bp SIS 11194 <br /> Stockton, CA 95201 <br /> Dear Mr. Knoll: <br /> Enclosed for your information and approval is the addendum to <br /> remedial work plan dated September 6, 1991 for subject location. <br /> Based on the results of the recent monitoring and sampling <br /> events, the following two changes to the automatic recovery <br /> system are proposed: <br /> 1) Due to the very low recharge rate of recovery well. MW-5, a <br /> new four-inch-diameter recovery well will be installed (see <br /> figure 1) . <br /> 2) There is no longer a sufficient quantity of free product at <br /> this sire to warrant the installation of a free-product <br /> holding tank or oil/water separator. <br /> If you have any questions, please feel free to contact me at <br /> r (818) 953-2626. <br /> Sincerely, a, ' <br /> ISE") 7HEALTH <br /> p U .r <br /> Stephen Pao Fl .E7 r� T-, 4tV1C�5 <br /> Field Engineer II <br /> enclosure <br /> cc: Ms. Elizabeth Thayer (w/ enclosure) <br /> RWQCB - Central Valley Region <br /> 3443 Routier Road <br /> Sacramento, CA 95827-3098 <br /> Yr. Peter DeSantis (w/ enclosure) <br /> BP Oil Company l <br /> -_ <br /> 2868 prospect Park Drive, Suite 360owdblih <br /> Rancho Cor dov�, ..CA..--956' - <br /> 6020 <br /> .r <br /> Environmental <br /> Awareness <br />