Closed, Illegal and Abandoned (CIA) Disposal Sites

Scaled Site Maps

The site map graphically illustrates the physical characteristics of the subject site (boundaries, size, orientation, landmarks, improvements/structures). In addition, it shows the location of the disposal site within the property, and it can be used to choose sampling locations or plot a sampling grid for Phase II investigations.

Sometimes the landowner or tenant may have a site map available for the subject site. It is always a good idea to double check the boundaries, the north direction, the scale, the measurements, and the locations of benchmarks and or structures to make sure that the site map accurately reflects the current conditions at the subject site. If there is no map available then you will need to develop a scaled site map. 

One way to do so is to have a contractor fly an aerial photograph of the site and develop a map using software that identifies the topography of the area photographed.

Another way to develop a site map is to hire a surveyor to traverse the boundaries and mark the locations of structures and benchmarks using GPS technology. The surveyor can then generate an accurate site map. If any details are missing, you can take field measurements and use drawing software to add the features you need to an electronic or scanned copy of the site map.

If none of these options are feasible, if the site is relatively small or if money is an issue then a scaled site map can be developed by walking the site with a wheel and 100-ft measuring tape and measuring the boundaries, structures, utilities (if applicable), landmarks, and benchmarks. Often a good landmark may be as simple a tree or bush that is different from the rest of the surrounding flora. Be sure to note the north direction with regards to the site. It is also a good idea to include the relative location of the subject site to any roads or highways, bodies of water, or any other prominent landmark that will help you identify the site on a topographic, aerial or parcel map. A field sketch containing all of the measurements taken at the site can be converted to a scaled drawing (usually 1 inch = 40, 50, or 60 feet) with a little patience and just about any drawing program. 

Last updated: October 29, 2007