Debris_Removal_Operations_Plan_Lassen_Volcanic_Park_Fire_Cleanup_REVISED_Drakesbad_WTP_6May2024.pdf

PDF 3 MB Posted May 6, 2024

Attached to: Removal of Hazardous Ash and Debris, Lassen VNP
Solicitation number: 140P8424Q0057
Issued by: Department of the Interior National Park Service Pacific West Region

About this file

Written by GovTribe AI · May 6, 2024

This document is a Debris Removal Operations Plan for the cleanup of fire ash and debris from the Dixie Fire that damaged properties in the Lassen Volcanic National Park, operated by the U.S. National Park Service.

The plan provides details on the assessment and quantities of hazardous and non-hazardous waste at various sites within the park, including the Drakesbad Water Treatment Plant, Kelley Cabin, and Mt. Harkness Lookout. It outlines procedures for the removal, handling, and disposal of the hazardous and non-hazardous materials, including asbestos and lead-acid batteries. The plan also addresses soil sampling and confirmation requirements. The related federal contract opportunity is for the removal of the hazardous ash and debris at the Drakesbad water tank site, with an estimated project range between $25,000 and $100,000. The requirement is a Total Small Business Set-Aside, and the Government anticipates awarding a firm-fixed-price purchase order.

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http://www.xrfresearchinc.com;		info@xrfresearch.com	Page 1 of 75
9921	Carmel	Mountain	Rd.	#326	San	Diego,	CA	92129	858-442-3230

Debris Removal Operations Plan (“DROP”)

Lassen Volcanic Park Dixie Fire Cleanup

Address: 38050 Highway 36 E, Mineral, CA 96061 (NPS Headquarter)

Prepared by: XRF Research Inc.

Prepared for: FedVet Construction, Inc

Date of Report March 30, 2023

DROP edited to cover only Drakesbad Water Treatment Plant. Other portions of report pertaining to other sites within Lassen Volcanic National Park have been deleted from this version of this report. May 3, 2024

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9921	Carmel	Mountain	Rd.	#326	San	Diego,	CA	92129	858-442-3230

March 30, 2023

Edgar DeLeon, President, Fedvet Construction

Re: Debris Removal Operations Plan, Lassen Volcanic Park Fire Cleanup

Dear Mr. DeLeon,

The

following

document

plan

for

fire

debris

cleanup

operations

Lassen

Volcanic

National

Park,

prepared

per

the

document

entitled

“140P8422Q0158

Attachment

01-

Statement

Work,

Hazard

Assessment

and

Soil

Remediation”

(“Statement

Work”).

This

document

revised

version

older

document

dated

December

11,

2022,

per

request

the

National

Park

Service

(NPS).

has

specifications

for

work

that,

part,

are

based

findings

from

the

assessment

carried

out

October

2022

and

summarized

the

document

entitled

Fire

Cleanup

Project,

Lassen

Volcanic

Park,

Phase

Site

Visit

Report

dated

November

30,

2022

(“Site

Visit

Report”).

you

have

any

questions

regarding

this

plan,

please

feel

free

contact

858-243-

5415

Ashley

Allison

(Certified

Asbestos

Consultant)

619-961-5420.

Regards,

Javier	Gonzalez,	Ph.D.,	President	of	XRF	Research,	Inc.
Senior	Industrial	Hygienist

Ashley Allison, California Certified Asbestos Consultant #10-6804

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9921	Carmel	Mountain	Rd.	#326	San	Diego,	CA	92129	858-442-3230

TABLE OF CONTENTS

I. Project Overview 4

Contact Information 5

II. Site Assessments 6

Waste and Debris Quantities 6

A/B) Mt. Harkness Fire Lookout and Pit Toilet 7

C) Kelley Cabin at Juniper Lake 14

D) Water Treatment Plant at Drakesbad 19

E/G) Drakesbad Area Boardwalks and Hot Springs Creek Bridge 25

F) Boardwalks, Grassy Swale 30

H) Devil’s Kitchen Boardwalk and Bridge 35

I) Boardwalks, Drake’s Lake Trail 41

J) Boardwalks, Summit Lake 50

III. Hazardous Waste Plan 56

1. Removal and Handling of both Hazardous Waste and Debris 56

2. Disposal and Recycling Facilities 61

IV. Background and Soil Confirmation Sampling 65

V. Signatures 67

VI. Appendix - Waste Characterization Lab Results Summary 68

VII. Attachment - Table II-1. Estimated Quantities of Waste for Sites 75

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9921	Carmel	Mountain	Rd.	#326	San	Diego,	CA	92129	858-442-3230

I. Project Overview

The

following

document

operations

plan

for

cleanup

fire

ash

and

debris

from

the

Dixie

fire

(July

2021)

that

damaged

number

properties

the

Lassen

Volcanic

National

Park

(LAVO),

operated

the

National

Park

Service.

Per

the

LAVO

website,

the

Dixie

Fire

started

July

13,

2021,

Feather

River

Canyon

southeast

Lassen

Volcanic

National

Park.

The

fire

entered

the

southeast

corner

the

park

near

Juniper

Lake

August

2021.

The

Dixie

Fire

reached

its

final

size

73,240

acres

within

the

park

September

30.

October

26,

the

Dixie

Fire

reached

100%

containment

with

total

size

963,309

acres

making

the

largest

single

fire

California

history.

Final

Dixie

Fire

footprint

within

the

park

measures

73,240

acres

approximately

the

entire

Dixie

Fire

footprint.

The

burn

sites

are

all

rural

areas.

Most

consist

boardwalks

constructed

pressure

treated

wood

watershed

marshy

areas,

some

accessible

only

foot.

Three

the

sites,

the

Drakesbad

Water

Treatment

Plant,

Kelley

Cabin

Juniper

Lake,

and

Mt.

Harkness

Lookout

and

pit

toilet,

were

developed

sites

with

structures.

pre-work

trip

was

conducted

October

–

October

11,

2022

survey

the

burn

sites

and

collect

ash

and

soil

for

composition

analysis.

The

results

were

summarized

trip

report

that

has

been

previously

submitted

and

reference

the

cover

letter

above.

Section

below

(Site

Assessments)

has

additional

site-specific

information

and

maps,

and

table

with

summary

all

the

sites

the

types

quantities

debris

and

waste

for

each.

Sections

III

–

have

work

practices

and

information

that

are

based,

part,

the

document

entitled

Plumas

County

Fire

Debris

Removal,

Alternative

(Private)

Debris

Removal

Program;

Beckwourth

Complex

and

Dixie

Fires,

September

24,

2021,

modified

per

NPS

speccifications.

Section

the

waste

characterization

data

and

the

table

VII

indicates

removal

quantities

for

each

site.

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9921	Carmel	Mountain	Rd.	#326	San	Diego,	CA	92129	858-442-3230

Contact Information for project:

• National	Park	Service
Anna	Schrenk
BAER	Implementation	Coordinator	for	Lassen	Volcanic	NP
14412	Kennedy	Memorial	Drive,	P.O.	Box	188
Whiskeytown,	CA	96095
530-242-3445	(Office)
530-440-6636	(Mobile)

anna_schrenk@nps.gov

• Contractor

Edgar	DeLeon,	President
FedVet	Construction
3513	Main	Street,	Suite	104B
Chula	Vista,	CA	91911

619-271-5888 Hazard Assessment Award 140P8422P0

• Consultant	Industrial	Hygienist
Javier	Gonzalez,	President
XRF	Research	Inc
170	Eucalyptus	Avenue,	Suite	105
Vista,	CA	92084

858-243-5415 jg@xrfresearch.com

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9921	Carmel	Mountain	Rd.	#326	San	Diego,	CA	92129	858-442-3230

II. Site assessments

Table II-1. Estimated Quantities of Waste/Debris for Lassen Burn sites:

See §IV –ATTACHMENT – end of document

Figure II-1. Map of all burn sites.

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9921	Carmel	Mountain	Rd.	#326	San	Diego,	CA	92129	858-442-3230

D) Water Treatment Plant at Drakesbad

Approximate Coordinates: 40.445209, -121.409165

• Accessibility:

The

site

was

accessed

car.

can

found

right

the

end

the

road

the

Chester

–

Warner

Valley

Road,

dirt

road

good

condition.

This

was

the

last

structure

traveling

West

after

passing

the

other

structures

(lodge,

cabins

and

boardwalk)

Drakesbad.

Parking

available

adjacent

worksite,

although

may

somewhat

difficult

for

large

vehicle

turn

around.

• Staging

Area:

The

recommended

staging

area

for

work

would

the

parking

area

the

Drakesbad

cabins

(coordinates

40.444240,

-121.404271).

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9921	Carmel	Mountain	Rd.	#326	San	Diego,	CA	92129	858-442-3230

• Hazardous

Trees:

hazardous

trees

were

observed

around

the

site

the

dirt

road

staging

area

that

leads

the

site

that

would

impact

operations.

• Chimneys,

Septic

Systems,

and

other

hazardous

structures:

chimneys,

septic

systems,

other

hazardous

structures

were

present

this

site.

glass-lined

water

storage

tank

that

had

been

damaged

the

fire

the

West

side

was

present

(See

Figure

D-1,

below,

for

the

floorplan

the

worksite

and

maps).

Per

the

NPS,

the

fire

had

caused

the

interior

glass

lining

flake

off,

the

tank

will

removed

part

the

rebuilding

the

water

treatment

plan.

The

tank

was

observed

measure

approximately

20’

diameter

and

15’

tall

and

appeared

associated

with

concrete

foundation,

though

only

portion

was

visible

the

Southeast

part

the

tank,

where

manhole

cover

was

present

the

foundation.

The

ash

footprint

was

mostly

present

another

concrete

foundation

that

was

the

base

for

pump

house

just

West

the

tank.

plastic

pipe

had

been

installed

divert

spring

water

into

larger

cast

iron

overflow

pipe

that

traveled

down

the

mountainside.

However,

the

large

pipe

was

overflowing,

possibly

due

clog

lower

elevation.

This

plastic

pipe

was

draped

over

the

footprint

and

will

have

moved

(possibly

routed

the

West)

access

the

site

during

cleanup

operations.

Per

the

NPS,

this

spring

water

pipe

will

replaced

part

the

process

for

rebuilding

the

water

treatment

plant.

• Asbestos	Assessment:	Suspect	asbestos	fragments	from	gaskets	were	observed	on
the	West	side	of	the	footprint.

• Hazardous

Debris

Components:

large

lead-acid

battery

was

observed

the

East

part

the

footprint

degraded

condition,

with

both

fragments

lead

and

lead

oxide

particulate

form

mixed

into

the

ash

footprint.

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9921	Carmel	Mountain	Rd.	#326	San	Diego,	CA	92129	858-442-3230

Recyclable Material Weight (Lbs)

Metal (Steel) ~16,000

Concrete ~24,000

Plastic ~100

• Hazardous

ash/soils:

The

ash

footprint

was

found

RCRA

hazardous

waste

(elevated

levels

lead)

also

California

Hazardous

waste

(for

lead

and

antimony).

Note

the

site

was

found

wet,

with

the

ash

the

burn

footprint

being

the

form

mud

sludge.

The

area

appears

watershed.

recommendation

was

submitted

the

NPS

use

barriers

prevent

flow

contaminated

material

(sludge)

from

the

worksite.

The

ash

waste

covers

area

150

ft2

and

will

involve

additional

subsoil

removal

total

9”,

this

represents

13,000

lbs

cubic

yards)

material.

Note

that

the

ash

footprint

extends

beyond

the

edges

concrete

foundation

and

has

mixed

with

soil.

The

ash

and

debris

would

removed

from

concrete

foundation,

then

the

surrounding

areas

followed

removal

the

concrete

foundation

and

final

scrape.

• Non-hazardous

ash/soils:

Not

applicable.

The

ash

and

soil

site

were

found

classified

hazardous.

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9921	Carmel	Mountain	Rd.	#326	San	Diego,	CA	92129	858-442-3230

Figure D1. Map of the of the Drakesbad Water Treatment plant worksite

Remove 2" depth of soil within visible ash footprint outside the concrete footprint and three feet out from the southeast and northeast sides of pad.

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9921	Carmel	Mountain	Rd.	#326	San	Diego,	CA	92129	858-442-3230

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9921	Carmel	Mountain	Rd.	#326	San	Diego,	CA	92129	858-442-3230

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9921	Carmel	Mountain	Rd.	#326	San	Diego,	CA	92129	858-442-3230

III. Hazardous Waste Plan

1. Removal	and	Handling	of	Hazardous	Wastes	and	Non-Hazardous	Debris	Removal
and	Handling.

For

all

sites,

either

the

ash,

the

ash

with

underlying

soil

the

case

the

Drakesbad

Water

Treatment

Plant

and

Kelley

Cabin,

were

found

regulated

wastes,

either

RCRA

commonly,

California

(“non-RCRA”)

Hazardous

Waste,

per

the

summary

the

revised

Trip

Report

dated

March

30,

2023.

The

following

considerations

apply

for

handling

and

removal

both

hazardous

and

non-hazardous

wastes/debris:

• See	Health	&	Safety	Plans	prior	to	starting	operations.	Workers	and	supervisors
should	have	HAZWOPER	training,	at	a	minimum.

• Dust	control	and	Stormwater	control	measures	should	be	used	(see	the	separate
documents	entitled	Dust	Control	and	Air	Quality	Monitoring	plan	and	Stormwater
Pollution	Protection	Plan).		This	includes	the	following	measures:

o A

fine

mist

water

should

delivered

with

sprayer

order

moisten

the

waste.

However,

the

amount

water

used

should

limited

avoid

pooling

water

and

runoff.

This

should

done

continuously

during

the

process

collecting

ash,

dust

soil,

with

one

worker

charge

the

wetting

process.

This

should

done

prior

to,

then

during

operations

moving

the

waste.

o When

moving

dropping

bulk

waste,

this

should

done

with

care,

such

way

that

the

formation

visible

dust

emissions

minimized.

• Erosion	Control.	Precautions	should	be	taken	throughout	the	project	to	prevent
erosion,	which	is	the	movement	of	material	containing	pollutants	from	the	burn
footprint	onto	other	areas:

o For

worksites

that

are

around

active

watersheds,

barriers

should

used,

such

hay

bales,

sand

bags,

silt

fences

berms

prevent

the

flow

sludge

water

through

the

worksite

during

operations.

! The sites involving boardwalks typically are in or around watersheds.

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9921	Carmel	Mountain	Rd.	#326	San	Diego,	CA	92129	858-442-3230

! The	Drakesbad	Water	Treatment	plant	was	observed	to	also	be	in
a	watershed	area.

o Stockpiling of waste material should be avoided (i.e., the contaminated

ash

and

soil

waste

should

placed

directly

lined

waste

containers

for

transportation).

However,

stockpiling,

temporary

storage

waste

material

the

worksite,

necessary

for

logistical

reasons,

then

the

waste

should

enclosed

(e.g.,

contained

with

plastic

sheeting)

not

dispersed

water

wind.

Waste

soil

and/or

ash

should

moistened

with

water

control

fugitive

dust

(without

causing

runoff)

prior

being

covered.

! If

necessary

stockpile

material,

this

should

not

placed

roadway

traffic

area.

• Asbestos Removal and packaging for staging/transport. Any suspect friable ACM

(asbestos

containing

materials)

need

either

burrito-wrapped

bagged

(this

landfill

requirement),

bulk

suspect

materials

should

segregated

and

placed

waste

bags

for

characterization

and

disposal

prior

removal

non-hazardous

debris,

ash

and

contaminated

soil.

This

operation

typically

done

the

same

time

that

other

highly

concentrated

hazardous

wastes

are

removed

(vide

infra).

o These materials include either/or window putty, gaskets, heat shields, vinyl

floor

tile

any

other

suspect

materials

discovered

during

cleanup

the

sites

that

had

structures:

Drakesbad

Water

treatment

plant,

Kelley

Cabin

and

Mt.

Harkness

Lookout.

Note

that

suspect

bulk

materials

may

tested

part

worksite

asbestos

survey

establish

asbestos

content.

o Per

NPS

specifications,

the

work

should

carried

out

licensed

Asbestos

Abatement

Contractor

and

overseen

Certified

Asbestos

Consultant.

• Hazardous Debris Components removal and packaging. Highly concentrated

hazardous

wastes,

other

than

asbestos,

such

the

degraded

lead-acid

batteries

and

associated

lead

oxide

beneath

and

around

them

should

bagged

6-mil

construction

debris

bags

order

minimize

exposure

toxic

fugitive

dust

during

operations.

the

case

asbestos

and

other

hazardous

waste

handling,

dust

control

measures

and

personal

worker

exposure

monitoring

should

used.

This

operation

may

carried

out

parallel

with

asbestos

removal,

applicable.

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9921	Carmel	Mountain	Rd.	#326	San	Diego,	CA	92129	858-442-3230

• Hazardous

Waste

(Ash

Ash/Soil)

removal.

The

regulated

ash

and/or

soil

should

placed

roll-off

dump

trailers

equivalent

containers

that

have

been

lined

with

6-10-mil

polyethylene

plastic.

The

waste

should

wrapped

with

the

plastic

and

completely

covered

with

tarp

that

particulates

not

escape

during

the

transportation

process.

should

also

labeled

and

manifest

should

used:

See

below,

licensed

hazardous

waste

transporters.

o Dust	control/erosion	measures,	personal	protection	and	monitoring	should	be
used	at	all	times.

o Precautions	should	be	taken	to	prevent	waste	material	from	escaping
containment	during	movement	from	the	burn	footprint	into	the
transportation	container.

o The

process

removing

hazardous

waste

may

occur

parallel

with

removal

non-hazardous

debris,

depending

the

conditions

the

worksite.

some

cases

necessary

rinse

and

remove

the

non-

hazardous

debris

order

access

the

ash.

For

example,

the

Kelley

cabin

burn

site

mostly

covered

galvanized

steel

roofing.

• Non-Hazardous

Debris

Removal,

Disposal

and

Recycling.

Debris

including

metal

and

concrete

should

separated

from

the

ash

the

burn

footprint

for

recycling.

the

case

the

metal

debris,

this

should

done

prior

removal

the

regulated

waste

(ash

and/or

soil)

whenever

possible.

the

case

concrete,

may

more practical

remove

after

the

contaminated

ash,

this

ash

often

top

and/or around

it.

o Metals

such

steel,

aluminum,

die

cast

(zinc)

brass/bronze

that

can

recycled

should

rinsed

in-situ

with

water

they

are

removed

from

the

burn

footprint

area

order

transport

them

recycling

center

(see

below).

The

water

rinse

also

serves

maintain

the

footprint

adequately

wetted,

but

this

needs

limited

avoid

pooling

runoff.

Dust

and

erosion

controls

listed

above

should

used.

o After

removal

the

ash,

but

prior

the

scrape,

the

concrete

shall

rinsed

situ or cleansed in

manner to render concrete non-hazardous.

1, .,.,. XRF Research, Inc .

• T o Note that both metal and concrete need to be clean from the ash debris in order to be recycled.

o Both concrete and metal must be covered with tarp during transportation.

The vehicle used to transport metal must go be cleared by law enforcement:

The vehicle identification number must be submitted to the Plumas County Sheriffs Office, 530-283-7438.

o The worksites should be left clean of all debris.

• Soil Scraping. After removal of all of the debris and ash is completed from each site's burn footprint, an additional quantity of soil is to be removed from within the burn site perimeter.

o This removed soil must be disposed at an appropriate landfill using the same handling, transportation and disposal procedures as for the ash and debris.

o The soil remaining on the ground after the scraping process is sampled (See §IV, below).

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Page 59 of75 858-442-3230

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• Transportation

and

Waste

Management

staging

areas.

This

refers

local

staging

prior

transfer

licensed

hazardous

waste

transporter

the

case

regulated

wastes.

o A

mini

(<1

ton)

excavator

such

the

Caterpillar

300.9D

(2061

lb,

29”

width)

equivalent

may

used

facilitate

removal

debris.

o A

Canycom

Toter

(e.g.,

Model

BFP602)

equivalent

may

used

one

option

move

debris

(and

waste)

from

remote

areas

that

are

not

easily

accessible

truck,

order

take

the

waste

appropriate

staging

area

for

and

transportation.

! The

equipment

will

inspected

prior

entry

into

the

park

and

upon

exit

and

cleaned

needed

arrives

and

leaves

uncontaminated.

! Staging areas may be designated by the NPS COR.

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2. Disposal and Recycling Facilities (final Treatment, Storage and Disposal Facilities, “TSDF”):

Facilities That California Hazardous Waste, RCRA Hazardous Waste and Asbestos (Subject to Confirmation by Contractor)

• Chemical	Waste	Management,	Inc	(DBA	“WM”	or	“Waste	Management”)
EPA	ID	CAT000646117
35251	Old	Skyline	Road
Kettleman	City,	CA	93239
Contact:	Nathan	Collins
Phone:	209-331-3664

Ncollin2@wm.com Hours of operation: 8 A.M. – 3:30 P.M., Monday - Friday

• Clean	Harbors	Buttonwillow	LLC
EPA	ID	CAD980675276
2500	West	Lokern	Road,	Buttonwillow,	CA		93206
Phone:	661-762-6200
Hours	of	operation	9	A.M.	–	4	P.M.,	Monday	-	Friday

Note

The

hazardous

waste

transported

the

above

permitted

sites

licensed

hazardous

waste

transporter.

Note

addition

the

analyses

that

have

been

carried

out

per

NPS

specifications

(See

Trip

Report),

both

landfills

also

require

profiling

the

waste

for

VOCs

(Volatile

Organic

Compounds,

e.g.,

via

analytical

method

EPA

8260)

even

the

waste

has

already

found

hazardous

due

the

presence

other

contaminants.

This

should

done

prior

transporting

the

waste.

Recycling	Centers	and	Landfills	for	Non-Hazardous	materials.	The	following
landfills/recycling	centers	accept	un-contaminated	non-regulated	(non-hazardous)	wastes.

Scrap Metals:

• Chico	Scrap	Metal
878	East	20th	Street
Chico,	CA	95928

530-343-7166

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Concrete and Asphalt:

• Franklin Construction

1019	Neal	Road
Paradise,	CA	95969

530-343-9600

Non-hazardous	ash,	debris,	contaminated	soil	(in	addition	to	metal,	concrete	and
non-friable	asbestos):

• Anderson	Landfill
18703	Cambridge,	Road
Anderson,	CA	96007

530-347-5236

Labeling, Tracking and Manifesting Waste:

• Hazardous waste should be labeled indicating information on the generator/EPA ID,

date	of	accumulation,	the	contents,	physical/chemical	properties	of	the	waste	and
manifest	number.

• Transporation

hazardous

waste

done

licensed

hazardous

waste

transporter

requires

Hazardous

Waste

Manifest

(EPA

Form

8700-22),

signed

both

the

generator

and

transporter,

per

CCR

Title

22,

§66263.20(a).

copy

the

waste

manifest

important

document

that

should

retained.

• A

certificate

disposal

from

the

Plumas

County

Environmental

Health

Department

will

needed

the

case

landfills.

Check

with

the

landfill

for

requirements

prior

transporting.

• Documentation of transportation and delivery of recycled materials should be retained.

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(2) This

placeholder

for

site-specific

goals.

Background

(natural)

levels

Arsenic

California

soil

are

higher

than

the

Risk-Based

screening

levels

and

typically

the

range

0.6-11

ppm*,

site-specific

BTVs

are

typically

used

establish

cleanup

goals**.

See:

• *Background	Concentrations	of	Trace	and	Major	Elements	in	California	Soils;	Kearney
Foundation	Special	Report,	University	of	California,	March	199

• **Arsenic	Strategies:	Determination	of	Arsenic	Remediation;	Development	of	Arsenic
Cleanup	Goals,	DTSC	(CA	Department	of	Toxic	Substances	Control),	January	16,	2009.

(3) This

the

TTLC

threshold

for

hazardous

waste

the

case

(VI)

that

could

used

the

absence

speciation

determine

the

oxidation

state

the

chromium.

The

TTLC

threshold

for

(III)

2,500

ppm,

which

could

alternatively

used

the

Chromium

known

exist

this

form

(established

through

testing).

(4) TTLC (hazardous waste threshold concentration), From CCR Title 22, §66261.24.

(5) Based

the

DTSC-SL

for

Mercury

ppm

for

residential

soil.

Note

the

level

for

commercial

4.4

ppm.

“DTSC-Modified

Screening

Levels

(DTSC-SLs)”;

HERO

HHRA

(Human

Health

Risk

Assessment)

NOTE

NUMBER

April

2019,

California

Department

Toxic

Substances

Control

(DTSC)

Human

and

Ecological

Risk

Office

(HERO)

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(1)

Note:

2,3,7,8-TCDD

“Dioxin”

“TCDD”

(2,3,7-8-tetrachlorodibenzo-p-dioxin).

For

reference,

the

residential

CHSSL

listed

4.6

10-6

ppm

(0.0000046

ppm,

4.6

ppt).

Commercial/industrial

1.9

10-5

ppm,

ppt.

See

“Use

California

Human

Health

Screening

Levels

(CHHSLs)

Evaluation

Contaminated

Properties”,

January

2005,

California

Environmental

Protection

Agency

¶TEQ

Total

Toxic

Equivalency.

This

takes

into

consideration

results

from

panel

dioxins,

weighted

for

toxicity

relative

TCDD.

The

table

color-coded

indicate

relative

levels…

green

numbers

are

below

the

most

stringent

state

screening

levels.

Yellow

above

these

levels

and

red

≥10-fold

typical

cleanup

levels.

See

“Review

State

Soil

Cleanup

Levels

for

Dioxin”,

EPA

December

2009

(2)

remediation

goal

<40

ppt

suggested

the

DTSC

for

agricultural

land

(also

ppt

for

residential

and

220-700

for

commercial/industrial

properties).

See

“Soil

Remedial

Goals

for

Dioxins

and

Dioxin-Like

Compounds

for

Consideration

California

Hazardous

Waste

Sites”;

Human

Health

Risk

Assessment

(HHRA)

Note

Number

April

2017,

California

Department

Toxic

Substances

Control

(DTSC)

and

Ecological

Risk

Office

(HERO).

(3) Asbestos (Table VI-3, left). As measured by CARB-435 Level A (400 point count):

• No

asbestos

was

detected

above

the

reporting

limit

0.25wt%

any

the

sites

measured

CARB-435.

Note

however,

that

this

method

that

designed

primarily

for

asbestos

soil.

burn

sites

asbestos-containing

materials

are

often

rendered

friable

after

fire,

but

may

retain

enough

their

structural

integrity

that

they

remain

present

mostly

bulk

materials.

The

CARB-435

method

(requested

the

SOW)

may

useful

the

final

screening

soil

after

cleanup,

but

may

underestimate

the

presence

asbestos

the

ash

footprint

the

asbestos-containing

material

present

predominantly

bulk

form.

(4) Mercury (Table VI-3, right). As measured by cold vapor AA:

• Levels

mercury

were

below

the

STLC

(hazardous

waste)

trigger

ppm

and

also

below

the

most

stringent

DTSC-SL

(suggested

cleanup

level)

ppm

for

all

sites.

See

Table

V-3,

right

and

footnote.

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VII. Attachment

Table II-1. Estimated Quantities of Waste for Sites

*This

assumes

weight

3105

lbs/yd3

(ir

115

lbs/ft3)

for

water-saturated

topsoil

(thecalculatorsite.com).

would

expect

these

conditions

based

the

proposed

time

year

for

the

work

(early

summer)

and

also

due

work

practices

employing

water

reduce

dust.

Ω The square footage has been adjusted in some cases from that in the original scope of work document to reflect what we observed.

File details come from the government source that posted it. Updated May 6, 2024.