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California Environme tai Protection Agency <br /> Department of Toxic ubstances Control HML# : 011393 to 011398 <br /> Hazardous Materials aboratory Authorization # : NMR4763 <br /> 2151 Berkeley Way, erkeley, CA 94704 Collector's No.: Buffing wheel <br /> Tel. No. (510) 540-30 3 to: Mud +water run off <br /> LABORATORY REPORT <br /> Collector's Name: Leo Valdez <br /> Location: Stockto Bum er Date Sampled: 06/07/02 <br /> Date Received: 06/10/02 <br /> E32S. dorado Date Assigned: 06/10/02 <br /> kto 95203 Activity: SCD <br /> Analytical Procedure U ed: Samples were extracted with 0.2M citrate buffer at pH 5 +/- 0.1 <br /> for 48 hours. The extracts were centrifuged and filtered. Metal analysis of the filtrate is done by <br /> ICPAES ( EPA Method q 6010B.) Results in mg/L. <br /> Method HML Met iod#910 <br /> Analysis; EPA Met od#60108. <br /> Analysis Results: <br /> HML No. Collect Ws Sample <br /> Sample No. p Barium Copper Nickel Lead Zinc <br /> Type (Ba) (Cu) (NI) (Pb) (Zn) <br /> 011393* S801 Buffing wheel <br /> 011394 SB02 Plastic bumper powder 19.0 10.9 <br /> 011395 SB03 Metal bumper powder N/R 1.31 2. N/R 377 <br /> 011397 SB05 32.2 <1.00 377 <br /> Sand blasting grit N/R N/R 17.4 N/R N/R <br /> 011398 SB06 Mud +water run off N/R 68.8 168 <br /> N/R N/R <br /> Post-It"brand fax transmittal memo 7671 a W pages . <br /> Note: < = below detection imit of the method. To >v/� e From -, <br /> * = Not analyzed du to insufficient sample. co. .- vKw .5Sc_iK <br /> Co. <br /> N/R = Not Required. Dept. <br /> Ph ie k <br /> Faxk -- L710J , 0 - 36 <br /> 540 • 3f19I axk <br /> ICP Analyst, Date <br /> Merlyn de Guzman <br /> �r <br /> Chemist's Signature D to Milad S. Iskand4,j,, is pace 6Z <br /> Fatima Hussain, Chemist <br /> ;Kom <br /> Y. <br /> I -d SI9E- tS-OIS (1WH) DS1Q dSI :EO 70 ZO Iter}�■ <br />