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ROrion Environmental Inc. <br /> o E.Spring St.,SUitC 2I2 62 88-2 PHONE <br /> C`3 34S P � g 5 9 755 <br /> s Long Beach,ca go8o6 562 988-2759 FAx <br /> t A€ 2 9 P M 42 O Box 455 707 963-8982 PHONE <br /> Rutherford,CA 94573 707 963-8983 FAx <br /> 24 May 2001 <br /> Project No. 11 ST <br /> Mr. Harlin Knoll, Senior REHS <br /> Site Mitigation Unit <br /> San Joaquin-County Environmental Health Division <br /> 304 East Weber Avenue, Third Floor <br /> Stockton, California 95202 <br /> Subject: Additional Groundwater Monitoring at MW-4 <br /> 400 North El Dorado Street, Stockton, California <br /> PIN 127434 <br /> Dear Mr. Knoll: <br /> Orion Environmental Inc. (Orion) is confirming the request from both the Regional Water <br /> Quality Control .Board.(RW <br /> QCB).and the San Joaquin County Environmental Health Division <br /> (SJCEHD) to collect, a, .confirmation, groundwater sample from MW-4 at the former <br /> Bridgestone/Firestone (BFS)'facility at 400 North EI Dorado Street in Stockton, California. This <br /> request was,itransmitted yesterday in your facsimile to Orion. We will prepare to collect this <br /> sample-Wifin �the,next week from MW-4 and use the same state-certified laboratory, Positive <br /> Laboratories of Los Angeles, to perform the EPA Method 8015/8021 analyses. <br /> Following data evaluation assuming law constituent of concern concentrations similar to those <br /> found during the April 2001 sampling event, it is my understanding that closure will be promptly <br /> approved by the oversight agencies for this site. With the SJCEHD destruction permit, Orion will <br /> then be prepared to over-bore and remove the four monitoring wells at the site. <br /> If you have any comments regarding this letter, please call me. <br /> Very truly yours, <br /> RION•ENVIRONMENTA`L INC. �f <br /> Harry_J. a ch . h.D... <br /> Senior Project anager <br /> :�.:. f� �n ;L <br /> ka1._� .-.•Cit' ;,,i; ,Li-s:?' .�.� {!�:__%� f.`„'[,:.��• y; -'':'+ �t,,., ,- , i,< . E .. . r �' :1 � <br /> Copy:, Debra Hamlin 'Bridgestone/Firestone; Inc. <br /> Wrty.Hartzell,}�RWQCB r.. _ <br /> a <br /> S:BFS\Stock1on\L1r\Ltr009 5/24/01 <br />