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h4 KLEINFELDER <br /> 4.2.1 Qualitative Field Screening <br /> To provide a qualitative indication of the presence of volatile organic constituents in the soil and <br /> to monitor the constituent concentrations in the breathing zone, a portable organic vapor analyzer <br /> was used to screen the samples in the field The Photovac MicroTip`RRD photo-ionization detector <br /> (PID) was used to measure total ionizable compounds in parts per million by volume (ppmv) of <br /> vapor <br /> Soil samples obtained were screened in the field, and the PID readings were recorded on the <br /> boring logs Strong petroleum-like odors were noted in soil samples collected during <br /> advancement of soil boring B-1 from sampling depths of 12 feet to 25 feet and a slight to strong <br /> petroleum-like odor was noted in B-2 from 12 feet to 25 feet PID readings fol the samples <br /> collected ranged from 23 to 332 ppmv in B-1 and 45 to 212 ppmv in B-2, with the PID values <br /> increasing with depth in both borings <br /> 4 3. SAMPLE HANDLING <br /> After collection the soil logged samples were labeled, to ed on a chain-of-custody, and immediately <br /> P <br /> stored in an iced cooler The samples were transported and tiansferred under chain of custody <br />' control to Kleinfelder's office and then transported by courier in a sealed container to Sequoia <br /> Analytical of Sacramento, California (Sequoia) for chemical analyses Sequoia is certified by the <br /> California Department of Health Seivices (DHS) to perforin the requested analyses <br /> 20-1417-16 EO1/2019R338 Page 7 of 12 <br /> © 1999 Klemtelder Inc Ma-, 12 1999 <br />