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E. Field Variations <br /> 1. To expedite the completion of field activities and avoid potential <br /> project delays, contingencies should be proposed and included <br /> in the project workplan (e.g., soil matrix samples will also be <br /> collected if clayey soils [as defined in the Unified Soil <br /> Classification System (USCS)]are encountered during the <br /> proposed soil gas investigation). <br /> 2. The Agency field staff should be informed of any problems, <br /> unforeseen site conditions, or deviations from the approved <br /> workplan. When it becomes necessary to implement <br /> modifications to the approved workplan,the Agency should be <br /> notified and a verbal approval should be obtained before <br /> implementing changes. <br /> F. Soil Matrix Sampling Requirements: Companion soil matrix <br /> sampling may be conducted concurrently with a soil gas <br /> investigation (in accordance with the ASGI, Section 5.0), except <br /> where extremely coarse-grained soils (as defined in USCS)are <br /> encountered or when specifically excluded by the Agency. <br /> 2.1.3 Soil Gas Investigation Reports:A soil gas investigation report including <br /> a discussion of field operations, deviations from the approved <br /> workplan, data inconsistencies, and other significant operational <br /> details should be prepared. The report may either be a stand-alone <br /> document in a format recommended by the Agency or be included <br /> within a site-specific assessment report. At a minimum, the report <br /> should contain the following: <br /> A Site plan map and probe location map at an appropriate scale as <br /> specified in the workplan (e.g., scale: one inch =40 feet); <br /> B. Final soil gas iso-concentration maps for contaminants of concern <br /> at the same scale as the site plan map; <br /> C. Summary tables for analytical data, in micrograms per liter(µg/L), <br /> in accordance with the ASGI; <br /> D. Legible copies of field and laboratory notes or logs; <br /> E. All analytical results and Quality Assurance/Quality Control <br /> (QA/QC) information including tables and explanations of <br /> procedures, results, corrective actions and effect on the data, in <br /> the format specified by the Agency; and <br /> F. Upon request, all raw data including chromatograms and <br /> calibration data should be submitted to the Agency. <br /> 01/28/2003 -3- <br />