single pathway (in this instance, direct ingestion of ground water at a rate of 1.5 liters/day for
the Child ages 0-6 and 3 liters/day for the adult ages 7-70) of the single hazardous substance,
identified in the table, from the single medium (ground water) and assuming an acceptable
exposure level:
(f) If multiple pathways, multiple media (primary and secondary sources), or multiple hazardous
substances are determined to be present by the Department, then criteria based on cumulative
risk shall be calculated following the procedures described under the definition of "cumulative
risk".
Legislative History-Adopted 12/22/03, Resolu. 2004-085; Readopted 8/01/06, Resolu. 2006-524.
Table A1. Groundwater Cleanup Levels Estimated to be Protective of the Human Health, given the
assumptions described in the test.
Hazardous Substance
Acephate
Acetaldehyde
Acetochlor
Acetone
Acetone cyanohydrin
Acetonitrile
Acetophenone
Acifluorfen
Acrolein
Acrylamide
Acrylic acid
Acrylonitrile
Alachlor
Alar
Aldicarb
Aldicarb sulfone
Aldrin
Ally
Allyl alcohol
Allyl chloride
Aluminum
Aluminum phosphide
Amdro
Ametryn
m-Aminophenol
4-Aminopyridine
Amitraz
Ammonia
Ammonium sulfamate
Aniline
Antimony and compounds
Antimony pentoxide
Antimony potassium tartrate
Antimony tetroxide
Antimony trioxide
Apollo
Aramite
Arsenic (noncancer endpoint)
Arsenic (cancer endpoint)
Arsine (see arsenic for cancer endpoint)
Assure
Asulam
CAS No.
30560-19-1
75-07-0
34256-82-1
67-64-1
75-86-5
75-05-8
98-86-2
50594-66-6
107-02-8
79-06-1
79-10-7
107-13-1
15972-60-8
1596-84-5
116-06-3
1646-88-4
309-00-2
5585-64-8
107-18-6
107-05-1
7429-90-5
20859-73-8
67485-29-4
834-12-8
591-27-5
504-24-5
33089-61-1
7664-41-7
7773-06-0
62-53-3
7440-36-0
1314-60-9
28300-74-5
1332-81-6
1309-64-4
74115-24-5
140-57-8
7440-38-2
7440-38-2
7784-42-1
76578-12-6
3337-71-1
Human Health
(μg/L)
4E-02
2.57E-02
2E-01
1E+00
8E-03
6E-02
1E+00
1.30E-01
2E-01
2E-03
5E+00
1E-02
1E-01
1.50E+00
1E-02
1E-02
3E-04
2.50E+00
5E-02
5E-01
1E+01
4E-03
3E-03
9E-02
7E-01
2E-04
2.50E-02
NA
2E+00
5.70E-02
4E-03
5E-03
9E-03
4E-03
4E-03
1.30E-01
2.50E-01
3E-03
3E-03
NA
9E-02
5E-01
283
Revised Spokane Law & Order Code, 5/14/2013