Land Quality – Hazardous Waste
Hazardous Waste Delisting
2019F006 Wastewater Treatment Sludge
Pacific Cast Technologies, Inc.
Nov. 15, 2019
Portland
Brian Fuller, Dan Lobato & Seth Sadofsky | Oregon Department of Environmental Quality
• Background
• Definitions
• Statutes and Rules
• Process
• Sampling and Analysis
• Rule Overview
Outline
Timeline
Nov 2018
Feb 2019
Apr 2019
July 2019
July2019
Aug 2019
Today
Definitions
Hazardous Waste• Characteristic -
• Ignitable
• Corrosive
• Reactive
• Toxic
• Listed - Wastes from specific industrial processes which are
assumed to be hazardous.– Delisting - A generator may file a petition demonstrating that a waste is not hazardous.
Definitions
• F006 - Wastewater treatment sludges
from electroplating operations.
– F006 is one of the more commonly delisted
wastes in the country.
Chemical etching and milling filter cake from dewatered sludge. Photo D. Lobato
• 50 Federal Register 52629: Federal to state program delegation
• 40 Code of Federal Regulations sections 260.20 and 260.22: Federal hazardous waste rules
• Oregon Revised Statute 466.075(3): Exceptions to listing
• Oregon Administrative Rule 340-100-0020, -0022: State hazardous waste rules including delisting
Statutes and Rules
Pacific Cast Technologies, Inc. F006 Delisting Background
Photo from https://www.atimetals.com/
Example Process
Cleaning RinseChemical Etching
and Milling
Rinse
Acid Neutralization
Precipitation
Sludge Settling and Dewatering
Sludge Treated Water
Pictures from: https://www.atimetals.com/businesses/aticastproducts/pages/default.aspx
Waste Sampling and Analysis
Chemicals Analyzed
F006
Cadmium Nickel
Hexavalent Chromium Cyanide
Other Potential Hazardous Constituients
Chromium Fluoride
Manganese Molybdenum
Silver Vanadium
Zirconium
Waste Sampling and Analysis
Waste
• Up to 9,000 cubic yards per year.
Samples
• 4 sampling events, 1 week apart.
Photo Credit: Google EarthChemical etching and milling filter cake from dewatered sludge. Photo by D. Lobato
0.1
1
10
100
1000
10000
Sample1a
Sample1b
Sample2
Sample3
Sample4
Cad
miu
m (
mg
/kg)
Total limit 8150 mg/kg
1
10
100
1000
10000
100000
Sample 1a Sample 1b Sample 2 Sample 3 Sample 4
Nic
kel (
mg
/kg)
Total limit 180000 mg/kg
1
10
100
1000
Sample 1a Sample 1b Sample 2 Sample 3 Sample 4
Hex
aval
ent
Ch
rom
ium
(m
g/k
g)
Total limit 373 mg/kg
0.1
1
10
100
1000
Sample 1a Sample 1b Sample 2 Sample 3 Sample 4
Co
mp
lexe
d C
yan
ides
(m
g/k
g)
Total limit 46700 mg/kg
0
50
100
150
200
250
300
Sample 1a Sample 1b Sample 2 Sample 3 Sample 4
Nic
kel (
mg
/kg)
Requires leaching test 270 mg/kg
0
10
20
30
40
50
Sample 1a Sample 1b Sample 2 Sample 3 Sample 4
Hex
aval
ent
Ch
rom
ium
(m
g/k
g)
Requires leaching test 45.4 mg/kg
0
20
40
60
80
100
Sample 1a Sample 1b Sample 2 Sample 3 Sample 4
Co
mp
lexe
d C
yan
ides
(m
g/k
g)
Requires leaching test 61.6 mg/kg
0
1
2
3
4
5
6
7
8
9
Sample1a
Sample1b
Sample 2 Sample 3 Sample 4
Cad
miu
m (
mg
/kg)
Requires Leaching test 1.8 mg/kg
Rule Overview
• Amend Oregon’s hazardous waste regulations
• Require annual testing
• Notify DEQ about changes
• Minor associated housekeeping on OAR 340-101-0004 Exclusions
DEQ recommends that the Environmental
Quality Commission adopt the proposed rules in
Attachment A as part of Chapter 340 of the
Oregon Administrative Rules, excluding Pacific
Cast Technologies, Inc.’s sludge from
classification as a F006 hazardous waste
Proposed Motion Language
“I move that the commission adopt the proposed
rule amendments in Attachment A as part of
chapter 340 of the Oregon Administrative
Rules.”
Recommendation
Slides for questions
0
1000
2000
3000
4000
5000
Sample 1a Sample 1b Sample 2 Sample 3 Sample 4
Zirc
on
ium
(m
g/k
g)
Total limit 4000
1
10
100
1000
10000
Sample 1a Sample 1b Sample 2 Sample 3 Sample 4
Ch
rom
ium
(m
g/k
g)
Total Limit 2600
Fluoride Silver ManganeseMolybdeniumVanadium Total concentration limits above or close to 1,000,000 parts per million in the waste based on the DRAS calculations
0
1000
2000
3000
4000
5000
Sample 1a Sample 1b Sample 2 Sample 3 Sample 4
Van
adiu
m (
mg
/kg)
Requires Leaching Test
0
100
200
300
400
500
Sample 1a Sample 1b Sample 2 Sample 3 Sample 4
Man
gan
ese
(mg
/kg)
Requires leaching test at 314 mg/kg
Chromium – Leaching limit for hexavalent chromium
Zirconium – No leaching limit
0
20
40
60
80
100
Sample 1a Sample 1b Sample 2 Sample 3 Sample 4
Silv
er m
g/k
g
Requires leaching test at 100 mg/kg
0
200
400
600
800
1000
Sample 1a Sample 1b Sample 2 Sample 3 Sample 4
Flu
ori
de
(mg
/kg)
Requires leaching test at 784 mg/kg
0
200
400
600
800
1000
Sample 1a Sample 1b Sample 2 Sample 3 Sample 4
Mo
lyb
den
ium
(m
g/k
g)
Requires leaching test at 227 mg/kg
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