Spring Hill Mine – Grass Valley, CA

Spring Hill Mine - Grass Valley, CA
Spring Hill Mine – Grass Valley, CA

Under DTSC oversight, H&K characterized 44,000 cubic yards of mine waste rock and 20,000 cubic yards of processed tailings at the 26-acre Spring Hill Mine site located in the historic Grass Valley Mining District. H&K performed predictive human health risk assessment per DTSC and EPA standards, considering multiple exposure scenarios. H&K also evaluated the potential risk to water quality pursuant to Regional Water Board guidelines. We performed an Engineering Evaluation/Cost Analysis (EE/CA) analysis pursuant to requirements of the National Contingency Plan (NCP), prepared a community profile and developed public participation procedures pursuant to the California Health and Safety Code.