SR0085423 (3) - Laserfiche WebLink

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Geocon Project No. S2170-07-12 - 19 - June 6, 2022 The primary principle in consideration of decontamination procedures is: Avoid unnecessary contamination of PPE and Sampling Equipment. The following decontamination guide for construction materials, equipment, and PPE have been developed with the intent of reducing the potential for the transfer of hazardous chemicals outside the Exclusion Zone. 6.1 Construction Materials and Equipment The PM or designee will control site access to ensure only authorized personnel and equipment and materials necessary for work handling impacted soils will be allowed in the exclusion zone. The exterior surfaces of excavation equipment, including buckets, tires and/or tracks will be scraped with shovels to remove substantial deposits of potentially contaminated soil prior to being rinsed with water. Shovels, hand tools, and other equipment will also undergo gross decontamination to remove any potentially contaminated soils. Soil, dust, debris, water and decontamination rinseate will be controlled to prevent entering nearby storm drains, creeks, or streams. 6.2 Sampling Equipment Decontamination Decontamination of soil sampling equipment shall include washing with a solution of TSP, Alconox®, or Liquinox® and water followed by a double rinse of deionized water between samples and before vacating the work area. 6.3 PPE Decontamination The PSO will determine the necessity for and level of decontamination appropriate to this project. Decontamination of PPE may be accomplished by personnel passing through separate stations or stages to reduce and remove contaminated clothing and equipment. Decontamination stations may include the following procedures listed sequentially below. Stage No. 1: Segregated Equipment Drop - Equipment and consumables that require either disposal or special handling (e.g., special and/or equipment decontamination) shall remain in this area and be decontaminated, if appropriate, or disposed of with the excavated materials or other potentially impacted materials. Stage No. 2: PPE Decontamination – Disposable PPE that has been potentially impacted will be placed in 55-gallon steel drums or plastic liners and disposed of with the other solid wastes generated. Stage No. 3: General Field Wash - Personnel shall wash and rinse face and hands with soap and water before leaving the site and/or eating. If changing of clothing is necessary, it shall be done at this time. Respirator decontamination, if required, shall include a wash with soap and water followed by a clean water rinse.