Youngdahl Consulting Group, Inc. first performed geotechnical engineering services for the El Dorado Disposal Service regarding the Dimetrics Building Project in 1988.

In 1998, naturally occurring asbestos (NOA) was identified in El Dorado Hills, with one location being a road cut on Harvard Way next to Oak Ridge High School.

Youngdahl Consulting Group, Inc. worked the Diamond Springs Parkway (DSP) project area including 63 parcels located east of Missouri Flat Road and north of Pleasant Valley Road in Placerville and Diamond Springs, California.