Specifications include, but are not limited to: 1. CONTRACTOR shall be responsible for removing GAC from existing filters and properly disposing of the material. 2. CONTRACTOR shall provide CITY time to inspect, backwash, and disinfect the underlying sand for each the filters as specified herein. 3. CONTRACTOR shall provide, transport, and deliver the filter GAC media at a location within the Project Site approved by the CITY. 4. CONTRACTOR shall install the GAC media over the existing sand layer in Filters 1, 2, 3, 4, 5, and 6. B. Filter Media Quantity: 1. Filter Dimensions: a. Existing Filters No. 1, 2, 3, 4, 5, and 6: 640 square feet (each filter). 2. CONTRACTOR shall provide sufficient media such that after placement, soaking, backwashing, and leveling, the final depth of the media is . The new GAC will be placed over 12-inches of the existing filter sand bed. Existing filter sand layer shall be left in place undisturbed when CONTRACTOR removes the existing GAC.
