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CAM TITLE 22 METALS <br /> TOTAL THRESHOLD LIMIT CONCENTRATION (TTLC) <br /> Preparation Method: EPA 3050 {a} <br /> Lab Project- <br /> ID Number: 11439-1 <br /> Comments <br /> The cover letter and enclosures are integral parts of this report. <br /> {a} Applies to all metals except Arsenic, Selenium, Thallium, and Mercury. EPA Method 3050 <br /> Nitric is used for Arsenic, Selenium, and Thallium digestion. EPA Method 7471 is used for <br /> Mercury digestion. <br /> Date Digested and Batch # apply to all metals except Arsenic, Selenium, and Thallium, which <br /> were digested on 03/27/95, Batch # 950327-5404; and Mercury, which was digested on <br /> 04/02/95, Batch # 950402-2201. <br /> {b} The sample was diluted 20 fold to bring target analyte within linear working range. <br /> {c} The sample was diluted 5 fold due to the presence of non-target analyte interferences. <br /> Contact: Greg Kirby <br /> Company: Erthco Environmental <br /> Address: PO Box 276048, Sacramento, CA 95827 <br /> Matrix: Soil <br /> Approved b+ Date: <br /> ose Page 2 <br /> MBT Environmental f I"'C Master Builders Te;hrc�rr�n ; <br /> Laboratories ��"�� <br />