Biosolids are sold as nutrient-rich fertilizer, but the Environmental Protection Agency and public health activists say hazardous chemicals are in the mix.
The audit alleged that Tulsa Public Schools covered expenses with money from a foundation, allowing them to avoid competitive bidding and itemized invoices.
Biosolids are sold as nutrient-rich fertilizer, but the Environmental Protection Agency and public health activists say hazardous chemicals are in the mix.
The audit alleged that Tulsa Public Schools covered expenses with money from a foundation, allowing them to avoid competitive bidding and itemized invoices.