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