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PMY <br /> final disposition of the materials. This information should be included in the project file. <br /> 4.0 Procedure - Decontamination Water <br /> The handling of decontamination water from the decontamination of field equipment (augers, excavator <br /> buckets, split-spoon samplers, mixing bowls, etc.) must be decided prior to field activities. The options are <br /> dependent on the anticipated contaminants at the site and the assumed volume of generated decontamination <br /> water. <br /> 4.1 Evaluation <br /> a) What are the potential contaminants? <br /> b) How much decontamination water is expected? Decontamination of hollow stem hand augers typically <br /> require a hot power washer area that is lined and designed to capture decontaminated wastewater <br /> which could generate a large amounts of decontamination wastewater; in retrospect, decontaminating <br /> stainless steel mixing bowls and spoons could generate under half a gallon of decontamination <br /> wastewater. <br /> c) It can also be acceptable under some circumstances to thin spread the decontamination wastewater <br /> on the ground surface near the sampling location. In this instance, this process of decontamination <br /> wastewater management must be approved by the landowner,regulatory community,project manager, <br /> and client. <br /> 4.2 Containerization of Decontamination Water <br /> a) Depending on the amount of and ultimate disposition of decontamination water, there are multiple <br /> options to containerize the waste: <br /> i) If the waste is less than five gallons, the water can either be combined in on 55-gallon drum <br /> that holds the waste soils. No more than five gallons of decontamination water will be placed in <br /> each drum. In order to dispose of the drum,the drum must past a paint filter test. <br /> b) If the waste is more than five gallons, the water must be containerized in an appropriate drum. <br /> Use 55-gallon (or other size), DOT-approved, polyurethane drums or equivalent, equipped with lids <br /> or bung holes. <br /> 4.3 Field Procedures <br /> The following procedures and considerations will be used in the field if drums or buckets are used: <br /> a) Always place drums in an area that will not impact the use of the property. Always notify the owner <br /> that drums have been stored on the site and explain the process and schedule for evaluating disposal <br /> options. If the owner or occupant of the site is available, question them on the best place to store the <br /> drums. <br /> b) The lids of the drums should be secured prior to leaving the site. <br /> c) The drums should be labeled, using a permanent paint marker,with the following information: <br /> i) "Pinyon Environmental - 303-980-5200" <br /> ii) Contact Name <br /> iii) 'Investigation Derived Purge Water" <br /> iv) Include the date of sampling activities <br /> v) Include the well numbers, specific to that drum <br /> If the decontamination wastewater is to be thin spread over the ground surface near the sampling location, it <br /> IDW and Waste Materials Handling <br /> December 23, 2022 <br /> Page 4of7 <br />