To aid with the sampling process, the Spring Valley neighborhood was divided
into 13 groupings. The Central Testing Area (CTA) is grouping 1, and the Comprehensive
Sampling Area (CSA) consists of groupings 2 through 13. Click on an area of
the map below to view a detailed map of that area, or click on the map title
below. For an explanation of the ground scar and stressed vegetation information
shown on these maps, scroll to the bottom of the page, or click here.
Ground Scar
- A ground scar is an area of bare soil, apparently the result of
human activity.
- Identification of feature: bare areas which may be the result of
a chemical spill, deposits of liquid or solid waste materials, or an area
where the topsoil has been disturbed leaving the surface devoid of vegetation.
- Significance: the absence of vegetative growth at an area over a
prolonged period of time should be an indication of some type of environmental
significance (e.g., contaminated soil). Access roads to the area are to be
noted, especially if the area is only accessible from the site in question.
Stressed Vegetation
- Stressed vegetation is a manifestation of vegetation stress and damage,
such as mortality or defoliation, that is potentially attributable to external
environmental factors.
- Identification of feature: identifying potential sources of vegetation
stress/damage is an extremely complex problem.
- Significance: important if directly associated with on-site activities.
If area is isolated and does not appear to be in a contaminant migratory pathway,
vegetative stress or damage is most likely not attributable to on-site activities.
When vegetation stress, damage, or dead vegetation is called out in an analysis,
it is accompanied by a discussion of any potential sources.
Page
Updated on 3/27/2002