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4 <br /> nColumbia <br /> Anatydcal <br /> wServkeSux. <br /> November 25, 1991 <br /> Vivian Hsiong <br /> E CON Associates <br /> 1921 Ringwood Avenue <br /> San Jose, CA 95131 <br /> Re: North County Landfill/939-02.31 <br /> Dear Ms. Hsiong: <br /> Enclosed are the results of the water samples submitted to our lab on November 5, <br /> 1991. For your reference, our service request number for this work is SJ91-1404. <br /> All analyses were performed in accordance with the laboratory's quality assurance <br /> program. <br /> Please call if you have any questions. <br /> Respectfully submitted: <br /> /�U014 7 <br /> Keoni A. Murphy <br /> COLUMBIA ANALYTICAL SERVICES, INC. <br /> le/KAM <br /> 1 <br />