Full containers must be dropped of at an Alameda County Household Hazardous Waste facility. For further information contact HHW at (800) 606-6606. District residents (present a copy of your Waste Management bill or ID at time of purchase) can purchase a postage-paid Sharps Disposal by Mail container at a discount at the Castro Valley Rite Aid. The cost of destruction and mailing, as well as confirmation of destruction, is included in the purchase price.