Monitoring of underground leakage of petroleum products is continuing near and around the Chevron Station in Idyllwild.

RM Environmental Inc. of Calimesa continues to monitor the site semi-annually for the presence of various hydrocarbons. The latest results, reported last month from samples taken in December, detected total petroleum hydrocarbons and methyl-tertiary-butyl ether on the site and in monitoring well no. 15.

The concentrations had decreased since the September testing and are the lowest since 2013.

RM Environmental will continue to monitor the site and recommended the installation of two more monitoring wells.

Also, RM Environmental continues to recommend that a soil-vapor extraction test be conducted. If the results indicate that SVE remediation be implemented, that will take about three years to complete, previous reports have indicated.