Soil & Groundwater Management Plans
When highway, secondary street and utility projects cannot be rerouted to avoid known or strongly suspected subsurface contamination or landfills, an optimum approach is often an Soil and Groundwater Management Plan (SGMP).
LCA essentially invented, or at least formalized, the SGMP approach when LCA was the environmental consultant for TxDOT on the Dallas High Five interchange project – the largest and most expensive single highway construction project in Texas history at the time.
The SGMP is an environmental construction specification that allows work to proceed through contaminated areas with a minimum of delay and additional expense. SGMPs normally include predictions of where contamination will be encountered and the nature and amount in all media. SGMPs also include field-screening protocols, special work procedures, waste handling and staging and waste re-use and disposal provisions, and modifications to material specs in contaminated zones, etc. LCA’s SGMPs are combined with transit corridor assessments, ROW expansions, and utility work to safely permit work through gasoline and solvent plumes, unregulated trash dumps, lead (Pb) impacted shooting ranges, and relic soil TPH along old roadways. Click here for a diagram showing a typical SGMP process.