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AlITTELHAUSER <br /> corporation <br /> 7901 Stoneridge Drive, Suite 123 <br /> Pleasanton, California 94588 <br /> Bus: (510) 416-2900 <br /> Fax: (510) 416-0957 <br /> August 14 , 1992 p�°e <br /> Ms. Elizabeth A. Thayer " iv by; <br /> Associate Engineer AUG 19 1992 <br /> Regional Water Quality Control Board ENVIRONMENTAL WEALTW <br /> 3443 Routier Rd. Suite A <br /> Sacramento Ca. 95827-3098 <br /> Dear Ms. Thayer, <br /> Subj : Background Soil Sample Results, 701 West 11th Street, Tracy, <br /> California. <br /> Attached please find the analytical results for the <br /> background soil samples taken from the subject site. <br /> These analyses were done in response to your letter of <br /> April 30, 1992 . Your letter expressed concern that the previous <br /> soil analysis at this site had shown heavy metal values for total <br /> metals in excess of the Title 22 criteria for soluble metals. The <br /> specific metals of concern included Barium, Chromium, Lead and <br /> Nickel. <br /> In accordance with your request, three background <br /> samples were collected from the site. (fig. 1) The samples were <br /> taken to a State Certified laboratory where they were first checked <br /> for soil pH. The range of pH values fell between 7 .9 and 8 . 3 . <br /> Accordingly, the soils were then extracted with deionized water and <br /> analyzed for the metals of concern. <br /> As you can see form the data, none of the metals <br /> approached the Title 22 criteria for solubility. From this data we <br /> conclude that the metals present in these soils do not pose a <br /> threat to water quality. <br /> We appreciate your assistance with this project and will <br /> look forward to your recommendation for "Closure" at this site. <br /> ® CHICAGO, IL BAKERSFIELD, CA INDIANAPOLIS, IN LAGUNA HILLS, CA <br />