The San Francisco Board of Supervisors approved the Fourth Amendment to a contract with Lystek International Limited for Class A Biosolids management services. This amendment increases the contract's total value by $20,770,000, bringing the new not-to-exceed amount to $36,670,000. It also extends the contract term by two years, establishing a new end date of June 30, 2029. The original agreement began on July 1, 2022. Board of Supervisors approval was required because the contract value exceeds the $10,000,000 threshold.