Laserfiche WebLink
j <br /> Engineers <br /> Planners TFH GAS & BTEX <br /> Economists 29851 <br /> Scientists page 2 a� <br /> II. EXTRACTION <br /> A. Holding Times: Holding times were met. Due to the level of <br /> target analytes in samples- 29851-1 (SB-DIS-3-60) , , <br /> 29851-2 (SB-DIS-3-66.5) , 29851-3 (SB-DIS-3-71.5) , I <br /> and 29851-9 (SB-DIS-3-76) , medium level protocol <br /> was performed for the BTEX analysis of these <br /> samples. <br /> Extraction <br /> B. Exceptions None encountered. <br /> i <br /> III. .ANALYSIS <br /> A. Holding Times: Holding times were met. <br /> I <br /> Analytical <br /> B. Exceptions Due to the concentration of- target analytes in <br /> samples 29851-1 (SB-DIS-3--60) , 29851-2 (SB-DIS-3- <br /> 66. 5) , 29851-3 (SB-DIS-3-71..5) , and 29851-9 (SB- <br /> DIS-3-76) , these samples were analyzed on a, <br /> diluted basis to obtain detector responses within <br /> the linear calibration range of the instrument. <br /> The BTEX analysis of sample 29851-15 (SB-DIS-3- <br /> 51. 5) was also analyzed on a diluted basis due to <br /> target analytes. Reporting limits have been <br /> adjusted accordingly. <br /> i <br /> IV. QUALITY CONTROL <br /> A. Method Blank The method blanks associated with these samples 1 <br /> met QC criteria. <br /> Surrogate <br /> B. Recoveries Percent recoveries for the soil extraction <br /> surrogate standard 1,4-Difluorobenzene could not <br /> be determined for samples 29851-1 (SB-DIS-3-60) , <br /> 29851-2 (SB-DIS-3-66.5) , 29851-3 (SB-DIS-3-71.5) , <br /> and 29851-9 (SB-DIS-3-76) due to the required <br /> dilutions. <br /> Matrix f <br /> C. Spike Results: Not applicable. <br /> ii �� ,11 <br /> 1 <br /> as29 v @ I d"1 j <br /> CH21W HILL Redding Quality Analytical Laboratories 5090 Caterpillar Rood,Redding,California 96003 916.244.5227 <br /> i <br />