Environmental Management

Creighton Avila

(530) 621-5153

Placerville, CA – Throughout the summer and fall there has been continued evaluation of corrective measures for the area around the former Diamond Lime Plant, which is located near the El Dorado Trail. The following are some of the tests and evaluations that have occurred: 

  • On July 28, 2016, the El Dorado County Transportation Division of the Community Development Agency’s Diamond Springs Parkway – Phase 1B, Phase II Environmental Site Assessment Work Plan was completed by Youndahl Consulting Group to conduct site characterization (soil and groundwater analysis) on properties which are in the footprint of the Diamond Springs Parkway, including areas that were part of the former Diamond Lime Plant. On October 6, 2016, an addendum to that work plan was completed that added monitoring wells to characterize groundwater on the former Diamond Lime Plant property that falls within the footprint of the Diamond Springs Parkway. The Central Valley Regional Water Quality Control Board (RWQCB) reviewed both plans; field work began in October 2016 and continues to date. 

  • On September 30, 2016 the RWQCB approved the Soil and Water pH Site Characterization Work Plan prepared by Holdrege & Kull for Mr. Michael Lindeman for the Linderman Property. The completed investigation report is due to the RWQCB by November 30, 2016. 

  • On November 4, 2016, a Phase II Environmental Site Assessment Work Plan prepared by Youngdahl Consulting Group on behalf of El Dorado Disposal was approved by the RWQCB. The Site Assessment will be conducted to determine if elevated pH in soil and groundwater exists beneath the Material Recovery Facility property, which is also within the area boundaries of the former Diamond Lime Plant. 

  • In addition to site characterization of the former Diamond Lime Plant property, El Dorado County Long Range Planning Division’s Stormwater unit has been conducting periodic testing of runoff from the former Diamond Lime Plant property during wet periods to verify pH. The last sample was collected on November 15, 2016. 

  • Approximately 120 feet of fencing has been installed along the north side of the El Dorado Trail in the vicinity of the previously identified elevated pH water.

The RWQCB continues to be the lead agency for the issue. The RWQCB is providing oversight of site assessment work conducted by all property owners and government agencies, including El Dorado County.

For additional information regarding stormwater in the El Dorado Trail area please contact Environmental Management at (530) 621-5300, or visit

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