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Initial Evaluation and Investigation of Underground Tanks, Appendix A, Tri- <br /> regional Recommendations for a Problem Assessmient Report (PAR) . The PAR is a + <br /> ( pro-active investigation designed to evaluate the spatial distribution of <br /> 1r� petroleum hydrocarbons in subsoil and groundwater with an objective of obtaining <br /> sufficient data to evaluate site-specific applicability of migrating and remedial <br /> i <br />� alternatives. <br /> Skin contact with potentially contaminate', soil or water will be minimized <br /> 1 by wearing personal protective clothing (As described in Section 7.0) . <br /> Inhalation of vapors during boring and soil slampling will be minimized by air <br /> monitoring, engineering controls, and the use of respiratory protection if action <br /> levels (see 6.1) are exceeded. Ingestion of contaminated materials will be <br /> minimized by good personal hygiene during deliontamination (i.e. , thoroughly <br /> washing face and hands with soap and water before eating or drinking) . <br /> A Photoionization Detector (PID) will be used to monitor for vapors. The <br /> analyzer will be used on a regular basis, typically every five to ten minutes, <br /> to monitor in the immediate vicinity of the borehole and cuttings adjacent to the <br /> borehole. If readings exceed an average of 15 ppm for more than one minute, <br /> monitoring in the operator's breathing zone (OBZ) of the person working nearest <br /> the borehole will start immediately, and person,llel will don protective clothing <br /> as described in Section 7.0. Additional exposure monitoring and personal <br /> protective equipment criteria are found in Sections :6.0 and 7.0, respectively. <br /> i <br /> d. <br /> 1 <br /> Ii C <br /> t <br /> i <br /> j <br /> E <br /> I <br /> CHEVMERC.H50 2 <br /> l <br />