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Geosynte& consultants 16. SPILL CONTAINMENT The task(s)for this project may involve the handling of drums and/or containers that contain stored chemicals, hazardous materials, and/or wastes. The drums and/or containers may have been spilled/dislodged during site activities due to compromised construction of the drum/container, transportation accidents, improper packaging practices, and improper handling of hazardous materials during on/off loading. Containers shall be inspected, and their integrity assured prior to being moved and/or handled. If the integrity of the container is in question, the container shall be over packed,or its contents transferred. Operations shall be organized and coordinated to minimize movement of such containers. Where spills, leaks, or ruptures may potentially occur, a supply of sorbents shall be located in the immediate area. Additional preventative measures include: • UN-approved 55-gallon drums, bins, and/or Baker tanks will be inspected for visible defects upon delivery to the site; • UN-approved 55-galon drums will also be inspected to ensure each drum includes a resealable lid with a small resealable sampling port near the top, or on the side of the drum and that the enclosure is not deformed and/or distorted; • Drums will not be completely filled to allow for possible expansion of liquid and will be set on wooden pallets to facilitate transport by forklift; • The storage area will be inspected to check for leaks weekly while the containers are being filled and immediately after relocation to a temporary on-site storage area; and • Flat areas will be selected for temporary storage away from high-traffic work areas/zones and storm/sewer drains. In the event of an unplanned release or spill of unknown or hazardous substances, the site supervisor will designate personnel who will support the spill containment, control, and/or clean- up procedures. The team will request additional off-site emergency response assistance if necessary, based on the type of spill,volume,potential toxicity, etc. The spill area will be isolated and restricted to only authorized personnel designated to assist with the containment, control, or clean-up activity. Authorized personnel will be trained to contain and clean spills from typical materials and quantities used at the project location. Physical barriers will be set up to warn unauthorized personnel to stay clear and evacuate the affected area. The spill, leak, or incident will be assessed by the team and characterized to determine the appropriate course(s) of action(s) to consider: • Small spills(i.e.,maximum volume of 55 gallons of a liquid or 100 pounds of a solid)may be remediated using absorbent materials by designated personnel; • Large spills (i.e., liquid volumes greater than 55 gallons or solid weights greater than 100 pounds)and/or spills of highly toxic materials may require assistance by off-site hazardous materials (HAZMAT) teams; Port of Stockton HASP A-1 05.01.2025