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ES-RR&IH-002 ® Stantec Decontamination Procedures SOP Page 4 of 6 Rev. 2 Jun 2016 Decontamination will be performed on all non-dedicated sampling equipment that may contact potentially contaminated soil or water, including water level probes, fiberglass tapes, Teflon bailers, and non-dedicated pump hoses. Clean nitrile gloves (or other appropriate material depending upon the chemicals involved) or powder less surgical gloves are to be worn during decontamination. Each piece of sampling equipment will also be decontaminated between each well. The decontamination procedure for most equipment will be as follows: • Disassemble equipment (i.e., bladder pump). • Wash equipment in AlconoxTM (or equivalent) and water solution using a brush or clean cloth to ensure emoval of all contaminants. • Rinse equipment in fresh tap water. Re-rinse with de-ionized water or distilled water. • Dry equipment with paper towel and place in clean place, if appropriate. The effectiveness of these decontamination procedures will be verified by vigorous QA/QC protocols, including blanks, duplicates, and spikes. Reusable instrumentation/equipment that has signs of visible NAPL or has potentially come in contact with NAPL-impacted material will be decontaminated in the following manner: 1. The instrumentation/equipment will be thoroughly rinsed with tap water to remove sediment and debris, after caked on material has been physically removed. 2. The instrumentation and sampling equipment will be thoroughly washed with a mixture comprised of approximately two (2) tablespoons of AlconoxTM (or similar low phosphate cleaning agent) per 1-gallon of de-ionized water. A stiff bristle scrub brush will be used if necessary to provide thorough cleaning. 3. The instrumentation/equipment will be triple-rinsed with unused distilled or de-ionized water where available. The effectiveness of the above decontamination procedures will be demonstrated through the periodic use of equipment blanks. A more detailed discussion of the proposed use of equipment blanks is provided in the FSP Drill rigs or Geoprobes used on site will be thoroughly decontaminated prior to their arrival at the site and prior to initiation of any drilling activities. The rig and its equipment will be thoroughly examined to ensure that there are no significant fuel, hydraulic fluid, transmission oil, and/or motor oil leaks that could create a condition not previously in existence or exacerbate an existing condition. Once the rig and its equipment have been thoroughly cleaned and inspected, subsequent decontamination efforts will focus only on those pieces of equipment which actually come into contact with soils or groundwater. No petroleum hydrocarbon based lubricants will be allowed on the drill stems or associated connections. Both the initial THIS INFORMATION FOR AUTHORIZED COMPANY USE ONLY STANTEC CONSULTING