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Is Data Valid? (circle) Preservation Temperature <br /> ;,,E„,, (If Known) <br /> 2.7(°C) <br /> Stantec Lab Validation Form <br /> Project/Client: ARCO Service Station No. 6080 <br /> Project No.: 211602061.400.672 <br /> Lab Work Order No.: 10-12-0722 <br /> Date of Validation: 12/10/2010 <br /> Date of Analysis: 12/09—12/10/2010 <br /> Date of Sampling: 12/08/2010 <br /> Completed By: Jose Yan <br /> Circle/Highlight <br /> Signature: Yes or No <br /> 1. Was the analysis the o requested? Yes No <br /> 2. Do the sample number(s) on the chain-of-custody (COC) match the one(s) that Yes No <br /> appear on the laboratory data sheet? <br /> 3. Were all samples prepared (extracted, filtered, etc.) within EPA holding times? Yes No <br /> 4. Once prepared/extracted, were all the samples analyzed within the EPA holding Yes No <br /> times? <br /> Yes No <br /> 5. Were Laboratory blanks performed, if so, were they below non-detect? <br /> Yes No <br /> 6. Are the units correct? (i.e., soil samples in mg/kg or pg/g, water samples mg/L, pg/L, <br /> and air samples in volume mg/m^3, etc.) <br /> Yes No <br /> 7. Were appropriate Matrix Spike (MS) and Matrix Spike Duplicate (MSD) samples <br /> included in the laboratory batch sample? <br /> Yes No <br /> 8. In lieu of MS/ MSD, were surrogate spike (SS) or surrogate spike duplicate (SSD) <br /> samples included in the laboratory batch samples? <br /> Yes No <br /> 9. Were MS/ MSD (or SS/SSD) within the acceptable range of% recovery (i.e., approx <br /> 80-120% depending on analyte)? <br /> Yes No <br /> 10.Were MS/MSD (or SS/SSD) values used to calculate Relative Percent Difference <br /> (RPD)? Yes No <br /> 11. Were RPD values within the acceptable range (i.e. ± 25%)? <br /> If any answer is no, explain why and what corrective action was taken: <br /> Lab Validation Form.doc Stantec <br />