Ammonia nitrate is the most common chemical used in fertilizers, providing nitrogen to plants for growth. Dichloropropane (DCP) has also become popular in agriculture as the most common pesticide sprayed on fruit and nut crops to control nematodes. When released into groundwater, nitrate and DCP can be hazardous to human health. A distributing facility in Northern California housed multiple storage tanks containing fertilizer. A leak in one of the storage tanks was found to be contaminating the groundwater with ammonia nitrate as well as DCP. A pilot test was performed to test the feasibility of HRC to treat nitrate and DCP. Historical concentrations of nitrate had reached 903,000 ug/L in groundwater while DCP concentrations were much lower.