EIA Studies of 3 Pre-Identified Hazardous Waste Disposal Sites in ...
EIA Studies of 3 Pre-Identified Hazardous Waste Disposal Sites in ... EIA Studies of 3 Pre-Identified Hazardous Waste Disposal Sites in ...
Rapid EIA Studies of 3 Pre-identified Hazardous Waste Disposal Sites in NCT - Delhi: No.19 3.3.3 Exclusionary Factors Page Certain factors termed as "Exclusionary Factors" should be imposed along with MOEF Stipulations for Siting of Industries to eliminate environmentally unsuitable sites from further analysis. These Exclusionary Factors are given below: • Seismic risk zones • National parks/ wildlife sanctuaries • Surface and subsurface mining areas • Coastal floor hazard areas • Coastal wet lands • Watersheds for public water supply • Critical recharge areas and sole source aquifers • Area of high well yield 3.3.4 Ranking of Site Alternatives The ranking of candidate sites is to be carried out based on detailed environmental, social and community impacts. The methodology for ranking of site alternatives comprises following steps: Select attributes for evaluation of site alternatives. Apportion a total score of 1000 between the assessment attributes based on their importance through ranked pair-wise comparison technique. Develop Site Sensitivity Index (SSI) using Delphi Technique. Estimate Score for each attribute for various candidate site alternatives using SSIs. Add the score for individual site alternatives, to rank the alternatives based on total score. The attributes are listed in table-3.1 and the weightages are given in table-3.2. The site with the least score is less sensitive i.e., there will not be significant impacts on environmental quality due to locating hazardous waste treatment and disposal facilities and hence, the most acceptable. Table-3.1: Site Sensitivity Indices for Selected Attributes Attribute SENSITIVITY INDEX 0.0 - 0.25 0.25 - 0.5 0.5 - 0.75 0.75 - 1.0 Receptor Related Population within 500 meters 0 to 100 100 to 250 250 to 1000 Greater than 1000 Distance to nearest drinking water well Greater than 5000 meters 2500 to 5000 Meters 1000 to 2500 meters Less than 1000 Meters Use of site by nearby Not used Occasional Moderate Regular Environment Division, National Productivity Council, New Delhi 1
Rapid EIA Studies of 3 Pre-identified Hazardous Waste Disposal Sites in NCT - Delhi: Page No.20 Attribute SENSITIVITY INDEX 0.0 - 0.25 0.25 - 0.5 0.5 - 0.75 0.75 - 1.0 residents Distance to nearest off Greater than 1500 to 3000 500 to 1500 Less than 500 site building 3000 meters meters meters meters Presence of major Airport Footpath Road Rail transportation route Land use/zoning Completely Agricultural Commercial Residential remote (zoning or industrial not applicable) Critical environments Not a critical environment Pristine natural area Pathway Related Environment Division, National Productivity Council, New Delhi Wetland, flood, plains and preserved areas Major habitat of endangered or threatened specks Distance to nearest Greater than 1500 to 8000 500 to 1500 Less than 500 surface water 8000 meters meters meters meters Depth to ground water Greater than 15 to 30 5 to 15 Less than 5 30 meters meters meters meters Type of contamination No contamination Soil contamination only Biota contamination Air, water on food contamination Precipitation effectiveness index * Less than 31 31 to 63 63 to 127 Greater than 127 Soil permeability Greater than 30% to 50% 15% to 30% 0% to 15 % 50% clay clay Bedrock permeability Impermeable Relatively impermeable Relatively permeable Very permeable Depth to bedrock Greater than 20 meters 10 to 20 meters 3 to 10 meters Less than 3 meters Susceptibility to Not Potential Moderate Severe erosion & run-off susceptible Climatic features with No problem Moderate High Severe respect to Air pollution Susceptibility to Non existing Potential Moderate High seismic activity Waste Characteristics Related Toxicity Sax's level 0 Sax's level 1 Sax's level 2 Sax's level 3 Radioactivity At or less than 1 to 3 times 3 to 5 times Over 5 times background level background level background level background level Persistence Easily biodegradable compound Ignitability Flash point greater than 95 Straight chain hydrocarbons Flash point of 60 to 95 O C Substituted and other ring compounds Flash point of 25 to 60 O C poly- Metals, cyclic compounds and halogenated hydrocarbons Flash point less than 25 1
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Rapid <strong>EIA</strong> <strong>Studies</strong> <strong>of</strong> 3 <strong>Pre</strong>-identified <strong>Hazardous</strong> <strong>Waste</strong> <strong>Disposal</strong> <strong>Sites</strong> <strong>in</strong> NCT - Delhi: Page<br />
No.20<br />
Attribute<br />
SENSITIVITY INDEX<br />
0.0 - 0.25 0.25 - 0.5 0.5 - 0.75 0.75 - 1.0<br />
residents<br />
Distance to nearest <strong>of</strong>f Greater than 1500 to 3000 500 to 1500 Less than 500<br />
site build<strong>in</strong>g<br />
3000 meters meters meters meters<br />
<strong>Pre</strong>sence <strong>of</strong> major Airport Footpath Road Rail<br />
transportation route<br />
Land use/zon<strong>in</strong>g Completely Agricultural Commercial Residential<br />
remote (zon<strong>in</strong>g<br />
or <strong>in</strong>dustrial<br />
not applicable)<br />
Critical environments<br />
Not a critical<br />
environment<br />
Prist<strong>in</strong>e natural<br />
area<br />
Pathway Related<br />
Environment Division, National Productivity Council, New Delhi<br />
Wetland,<br />
flood, pla<strong>in</strong>s<br />
and<br />
preserved<br />
areas<br />
Major habitat<br />
<strong>of</strong> endangered<br />
or threatened<br />
specks<br />
Distance to nearest Greater than 1500 to 8000 500 to 1500 Less than 500<br />
surface water<br />
8000 meters meters meters meters<br />
Depth to ground water Greater than 15 to 30 5 to 15 Less than 5<br />
30 meters meters meters meters<br />
Type <strong>of</strong> contam<strong>in</strong>ation No<br />
contam<strong>in</strong>ation<br />
Soil<br />
contam<strong>in</strong>ation<br />
only<br />
Biota<br />
contam<strong>in</strong>ation<br />
Air, water on<br />
food<br />
contam<strong>in</strong>ation<br />
<strong>Pre</strong>cipitation<br />
effectiveness <strong>in</strong>dex *<br />
Less than 31 31 to 63 63 to 127 Greater than<br />
127<br />
Soil permeability Greater than 30% to 50% 15% to 30% 0% to 15 %<br />
50% clay clay<br />
Bedrock permeability Impermeable Relatively<br />
impermeable<br />
Relatively<br />
permeable<br />
Very<br />
permeable<br />
Depth to bedrock Greater than<br />
20 meters<br />
10 to 20<br />
meters<br />
3 to 10<br />
meters<br />
Less than 3<br />
meters<br />
Susceptibility to Not<br />
Potential Moderate Severe<br />
erosion & run-<strong>of</strong>f susceptible<br />
Climatic features with No problem Moderate High Severe<br />
respect to Air pollution<br />
Susceptibility to Non exist<strong>in</strong>g Potential Moderate High<br />
seismic activity<br />
<strong>Waste</strong> Characteristics Related<br />
Toxicity<br />
Sax's level<br />
0<br />
Sax's level<br />
1<br />
Sax's level<br />
2<br />
Sax's level<br />
3<br />
Radioactivity<br />
At or less than 1 to 3 times 3 to 5 times Over 5 times<br />
background<br />
level<br />
background<br />
level<br />
background<br />
level<br />
background<br />
level<br />
Persistence<br />
Easily<br />
biodegradable<br />
compound<br />
Ignitability Flash po<strong>in</strong>t<br />
greater than 95<br />
Straight cha<strong>in</strong><br />
hydrocarbons<br />
Flash po<strong>in</strong>t <strong>of</strong><br />
60 to 95 O C<br />
Substituted<br />
and other r<strong>in</strong>g<br />
compounds<br />
Flash po<strong>in</strong>t <strong>of</strong><br />
25 to 60 O C<br />
poly-<br />
Metals,<br />
cyclic<br />
compounds<br />
and<br />
halogenated<br />
hydrocarbons<br />
Flash po<strong>in</strong>t<br />
less than 25<br />
1
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