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-7 Rul <br /> w <br /> gWW <br /> OUNIMEN WIN <br /> hh«« _ k <br /> M. <br /> vr"*n,<�^, r .Mv <br /> y� _ +e-.. __ -.T^5Y�_ — ..—�-„..=..._.....-..-. -- •..wr..�asece .ae•s�'m.�ame=+ae�m.' .5W mraear.,a ynax wr.em..a+�R�;y FdyaTl <br /> Y” <br /> EI 1st.cc <br /> A Cumme Rw Nnv <br /> I Sample Pocription <br /> See the attached Sample Description Information. <br /> The sample was received under chain-of-custody. <br /> II Analysis Request <br /> The following analytical tests were requested. <br /> aL b ID An,�]vsis Description <br /> 057862-0003 Total Petroleum Hydrocarbons (Gasoline) and BTEX <br /> Selected Metals <br /> III Ouality Control <br /> A. proJezt Specific OC. No project specific QC (i.e., spikes and/or <br /> duplicates) was requested. <br /> B. Method Blank Results, A method blank is a laboratory-generated <br /> sample which assesses the degree to which laboratory operations <br /> and procedures cause false-positive analytical results for your <br /> sample. <br /> No target parameters were detected in the method blanks associated <br /> with 'our sample at the reporting limit levels noted on the <br /> atta4ed Method Blank Repurt. <br /> C. Laboratory Control Samples - The LCS Program <br /> Duplicate Control Samples. A DCS is a well-characterized matrix <br /> (blank water, sand or celite) which is spiked with certain target <br /> parameters and analyzed at approximately 10% of the sample load in <br /> order to establish method-specific control limits. The DCS <br /> results associated with your sample are on the attached Duplicate <br /> Control Sample Report. <br /> Accuracy is measured by Percent Recovery as in: <br /> % recovery d (measured concentration) x 100 <br /> (actual concentration) <br /> Precision is measured using duplicate tests by Relative Percent Difference <br /> (RPD) as in: <br /> RPO (y recovery test I - % recovery test 2)_ x 100 <br /> (% recovery test 1 + % recovery test 2)/2 <br /> f. <br />