Washington Administrative Code
Title 173 - Ecology, Department of (See also Titles 197, 317, 372, and 508)
Chapter 173-303 - Dangerous waste regulations
Section 173-303-100 - Dangerous waste criteria
Current through Register Vol. 24-06, March 15, 2024
(1) Purpose. The purpose of this section is to describe methods for determining if a solid waste is a dangerous waste by the criteria set forth in this section. The dangerous waste criteria consist of:
(2) References. The following toxicity data sources are adopted by reference:
(3) A person must use data that are available to him or her, and, when such data are inadequate for the purposes of this section, must refer to the references identified in WAC 173-303-100(2) to determine:
(4) Quantity exclusion limit. A solid waste is a dangerous waste if it meets one or more of the dangerous waste criteria described in subsections (5) and (6) of this section. If a person's solid waste meets one or more of these criteria then he or she is a dangerous waste generator (and may not be considered a small quantity generator as provided in WAC 173-303-170(2) ) if the quantity of the waste exceeds the following quantity exclusion limits:
(5) Toxicity criteria. Except as provided in WAC 173-303-070(4) or (5), a person must determine if a solid waste meets the toxicity criteria under this section by following either the instructions for book designation, when his knowledge of the waste is sufficient, or by testing the waste using the biological testing methods adopted under WAC 173-303-110(3).
TOXIC CATEGORY TABLE
Toxic Category |
Fish LC50(mg/L)b |
Oral Rat LD50(mg/kg) |
Inhalation Rat LC50(mg/L)c |
Dermal Rabbit LD50(mg/kg) |
X |
<0.01 |
<0.5 |
<0.02 |
<2 |
A |
0.01 - <0.1 |
0.5 - <5 |
0.02 - <0.2 |
2 - <20 |
B |
0.1 - <1 |
5 - <50 |
0.2 - <2 |
20 - <200 |
C |
1 - <10 |
50 - <500 |
2 - <20 |
200 - <2000 |
D |
10 - 100 |
500 - 5000 |
20 - 200 |
2000 - 20,000 |
a These four test endpoints are defined in WAC 173-303-040. |
b Fish LC50 data must be derived from an exposure period greater than or equal to twenty-four hours. A hierarchy of species LC50 data should be used that includes (in decreasing order of preference) salmonids, fathead minnows, and other fish species. |
c Inhalation Rat LC50 data must be derived from an exposure period greater than or equal to one hour. |
where [SIGMA] (X,A,B,C, or D)% is the sum of all the concentration percentages for a particular toxic category.
Example 1. A person's waste contains: Aldrin (A Category) - .01%; Endrin (A Category) - 1%; Benzene (D Category) - 4%; Phenol (C Category) - 2%; Dinoseb (B Category) - 5%; Water (nontoxic) - 87%. The equivalent concentration (E.C.) would be:
So the equivalent concentration equals 0.1534%.
Example 1. Continued. The equivalent concentration of 0.1534% (from Example 1. above) is greater than 0.001% and less than 1.0%. The waste is DW and the dangerous waste number WT02 must be assigned.
(6) Persistence criteria. For the purposes of this section, persistent constituents are chemical compounds which are either halogenated organic compounds (HOC), or polycyclic aromatic hydrocarbons (PAH), as defined under WAC 173-303-040. Except as provided in WAC 173-303-070(4) or (5), a person may determine the identity and concentration of persistent constituents by either applying knowledge of the waste or by testing the waste according to WAC 173-303-110(3)(c) Chemical Testing Methods for Designating Dangerous Waste Publication #97-407.
Example 2. A waste contains: Carbon tetrachloride -.009%; DDT - .012%; 1,1,1 - trichloroethylene - .020%. The total halogenated organic compound concentration would be:
Total HOC Concentration (%) = .009% + .012% +.020% =.041%
Example 3. A person's waste contains: Chrysene - .08%; 3,4 - benzo(a)pyrene - 1.22%. The total polycyclic aromatic hydrocarbon concentration would be:
Total PAH Concentration (%) = .08% + 1.22% = 1.30%
PERSISTENT DANGEROUS WASTE TABLE
If your waste contains... |
At a total concentration level of... |
Then your waste's designation, and waste # are... |
Halogenated Organic Compounds (HOC) |
0.01% to 1.0% greater than 1.0% |
DW, WP02 EHW, WP01 |
Polycyclic Aromatic Hydrocarbons (PAH) |
greater than 1.0% |
EHW*, WP03 |
(7) Reserve.
Statutory Authority: Chapters 70.105 and 70.105D RCW. 09-14-105 (Order 07-12), § 173-303-100, filed 6/30/09, effective 7/31/09. Statutory Authority: Chapters 70.105, 70.105D, and 15.54 RCW and RCW 70.105.007. 04-24-065 (Order 03-10), § 173-303-100, filed 11/30/04, effective 1/1/05. Statutory Authority: Chapters 70.105 and 70.105D RCW. 03-07-049 (Order 02-03), § 173-303-100, filed 3/13/03, effective 4/13/03. Statutory Authority: Chapters 70.105, 70.105D, 15.54 RCW and RCW 70.105.007. 00-11-040 (Order 99-01), § 173-303-100, filed 5/10/00, effective 6/10/00. Statutory Authority: Chapters 70.105 and 70.105D RCW. 98-03-018 (Order 97-03), § 173-303-100, filed 1/12/98, effective 2/12/98; 95-22-008 (Order 94-30), § 173-303-100, filed 10/19/95, effective 11/19/95; 94-01-060 (Order 92-33), § 173-303-100, filed 12/8/93, effective 1/8/94. Statutory Authority: Chapter 70.105 RCW. 84-09-088 (Order DE 83-36), § 173-303-100, filed 4/18/84. Statutory Authority: Chapter 70.105 RCW and RCW 70.95.260. 82-05-023 (Order DE 81-33), § 173-303-100, filed 2/10/82.