fish and wildlife. In upland areas, site preparation activities, such as 

 grading and filling, road construction, and cable and pipeline laying, 

 have few adverse effects if standard erosion control and other precautions 

 are taken. The work area usually requires an adequate buffer zone to 

 minimize dust and noise problems and to aid in filtering runoff water. 



Subproject: Site Development (SP-6) 



Disturbing Activity: Line construction 



The site development plan must provide for underground stormwater 

 collection systems and wastewater disposal systems because of the high 

 potential for toxic spills and contamination at a gas processing plant. 

 Other services including high capacity electric power lines must also be 

 provided. 



Subproject: Groundwater Supply (SP-9) 



Disturbing Activity: Groundwater withdrawal 



Gas processing plants require about 1.5 gallons of water per thousand 

 cubic feet of gas processed [7]. Water demand for partial processing 

 facilities included in a gas plant complex is negligible. While the 

 overall water demand for a gas plant, is relatively low when compared to 

 other major petroleum development facilities, precautions must be taken 

 to avoid environmental disturbances from excessive groundwater withdrawal. 



Subproject: Stormwater Systems (SP-12) 



Disturbing Activity: Stormwater conveyance 



Stormwater runoff from the process areas of a gas processing plant 

 is likely to be contaminated and shou'd be collected and treated before 

 discharge. Potential hazardous contaminants include liquid hydrocarbons, 

 oils, and other toxic chemicals. In addition, liquid feedstock and 

 product transfer systems (such as pipelines) on the site have an 

 appreciable potential for leaks and spills, requiring that berms and 

 other containment systems be provided along with adequate capacity in the 

 collection system to handle the maximum expected contaminant load. Where 

 contamination of the yard surface by toxic matter is routine, a separate 

 runoff collection system with special treatment facilities is necessary. 



Subproject: Solid Waste Disposal (SP-13) 



Disturbing Activity: Solid waste disposal 



Solid wastes from gas processing plants include processed sludge 

 from brine evaporation, residuals from accidental spills, and general 

 office and packaging materials. Solid wastes containing toxic and 



76 



