Atttachement C_ SiteSamplingGuidelines.pdf

Camp Fire Residential Health Screening Level Guidance, Cleanup Goals and Background Data Sets

Updated March 14, 2019

The following summary tables provide updated health screening level guidance and cleanup goals for the Camp Fire Alternative Program. For the Camp Fire, CalRecycle revised many of the health screening levels that were provided in the Alternative Program Guidelines. These new screening levels also include compiled background levels for various metals that take into consideration the geologic and geographic location of sampling. Where confirmation soil sampling exceeds the health screening levels, a licensed professional (California licensed geologist, civil engineer or petroleum engineer1), may in their professional judgement certify that the results are naturally occurring, and additional cleanup will not be required based on the exceedance. This determination must take into consideration site specific data relative to local geology, and the geologic chemical data in the tables provided where results within 20% of the stated background data would be considered passing. Where confirmation sample results exceed data sets contained in the published tables and/or additional clearing with additional testing does not meet health screening criteria or published regional background sets, site specific background samples may be collected to establish that the cleanup has been performed to background levels.

Guidance for Site Specific Background Data Collection and Analyses The following guidance is provided to assist licensed professionals to establish site specific background data:

1) Three locations shall be identified away from the impacted/cleanup area, such that minimal air blown ash or debris may disturb the desired samples. Locations should be staggered to represent the area.

2) In order to assure a “clean” or “native” sample, the first 3 inches of dirt shall be removed from the ground surface.

3) Samples shall be collected from 3 to 9 inches and placed in appropriate containers for transport to a California ELAP Certified analytical laboratory.

4) Samples shall be analyzed for metals under EPA Method 6020.

5) Analytical results will be reviewed and compiled by the licensed professional, and a determination made if the results are representative of background for the subject site.

Additional Advisories:

In cases where a subject site has been cleaned up to background levels and health screening levels are exceeded property owners should be advised of the exceedance.

Reporting:

In order to facilitate the expedient review of cleanup documentation, results of testing and analyses shall be outlined in tables for each site compared against the identified screening level and the property location shall be included on the map that will show the correct geologic unit. Certified analytical reports shall be attached including all QA/QC documentation from the lab.

Attachments:

Camp Fire Background Table ‐ PDF Camp Fire Background Sampling Locations ‐ PDF

1California Code of Regulations Title 16, Division 29§§ 3000‐3067 & Business and Professions Code §§ 7800 – 7887

TABLE

TABLE 1

CLEANUP GOALS SCREENING CRITERIA SUMMARY

CAMP FIRE INCIDENT

Background

Set

Q

Tc

Tv

Tvp m

Ku gb grMZ

Mzv um

Pm

Pz

Pzv

Antimony

Arsenic

4.7 5.6

2.3 2.7

8.9

7.7 9.2

2.6 3.1

6.8 8.1

7.8 9.4

7.4 8.9

2.6 3.2

Barium

9,999 9,999

9,999 9,999

9,999 9,999

9,999 9,999

9,999 9,999

9,999 9,999

9,999 9,999

9,999 9,999

9,999 9,999

9,999 9,999

9,999 9,999

9,999 9,999

Beryllium

Cadmium

5.2 6.2

5.2 6.2

5.2 6.2

5.2 6.2

5.2 6.2

5.2 6.2

5.2 6.2

5.2 6.2

5.2 6.2

5.2 6.2

5.2 6.2

5.2 6.2

5.2 6.2

Chromium

2,499 2,499

2,499 2,499

2,499 2,499

2,499 2,499

2,499 2,499

2,499 2,499

2,499 2,499

2,499 2,499

2,499 2,499

2,499 2,499

2,499 2,499

2,499 2,499

Cobalt

Copper

2,499

2,499 2,499

2,499 2,499

2,499 2,499

2,499 2,499

2,499 2,499

2,499 2,499

2,499 2,499

2,499 2,499

2,499 2,499

2,499 2,499

2,499 2,499

Lead

Mercury

1.0 1.2

1.0 1.2

1.0 1.2

1.0 1.2

1.0 1.2

1.0 1.2

1.0 1.2

1.0 1.2

1.0 1.2

1.0 1.2

1.0 1.2

1.0 1.2

1.0 1.2

Molybdenum

Nickel

Selenium

Silver

Thallium

5.0 6.0

5.0 6.0

5.0 6.0

5.0 6.0

5.0 6.0

5.0 6.0

5.0 6.0

5.0 6.0

5.0 6.0

5.0 6.0

5.0 6.0

5.0 6.0

5.0 6.0

Vanadium

Zinc

4,999 4,999

4,999 4,999

4,999 4,999

4,999 4,999

4,999 4,999

4,999 4,999

4,999 4,999

4,999 4,999

4,999 4,999

4,999 4,999

4,999 4,999

4,999 4,999

Notes:

31 Cleanup goal 37 Lab Margin of Error (20%) applied

• All concentration reported in milligrams per kilogram (mg/kg)

• The cleanup goal is the lower of the regulatory screening levels unless the background concentration is higher than the screening levels, in which case the background level is selected as the cleanup goal.

• Cleanup goals represented by background levels are presented in italics.

• The estimated laboratory margin of error of 20 percent is not applied to lead and TTLC concentrations.

• Samples above the cleanup goals but within the laboratory margin of error are considered by CalRecycle to meet the overall cleanup objectives of the debris removal action.

• All risk-based screening levels represent residential and unrestricted use scenarios; any updates regarding commercial use scenarios will be provided in a revised table.

FIGURES

Tv Tv mv Tvp gr-m m m Pz Tv grMz gb

1 2 gb Pzv 3 Ku mv water Pzv

Tv !. !. um

Tvp !. um !. Pz C m

A !. !. um !.!.water !. grMz

Ku !. !.!? Pm

!. !. !.!?!. !. !.!.!. um

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Ku !.!. water Mzv grMz water water Q

Tvp Tv Mzv

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QPc Tv

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? statistical evaluation; results remain within the qualitative evaluation.

Camp Fire Butte County, California

Figure 1

Overview Index Map

3/7/2019 C:\CalRecycle\Camp Fire\Figure 1 Camp_overall_BackgroundSamples.mxd TtEMI michelle.handley

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Ku !.

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!. 020

!. 021

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Incident Boundary

!. Mzv

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Ü 0 0.5 1 1.5

Miles !. Pzv

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Sample identified as outlier and removed from ? statistical evaluation; results remain within the

T m .

!. Ku

Butte County, California

Figure 2

A1

Impacted Parcel

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!. 005 .! 001

.! 010

.! 008

.! 009

.! 011

.! 014

!. 015

.! 007

.! 012

?! 013

.! 002

!. 003

!. 004

!. 017 grMz

.! 006

191!? !.192

016 .!

189 !. 018

!. 027

!. 019

!. 028

Ku !. 031

.! 036

.! 032

.! 037

!. 029

Background Sample Location Incident Boundary

!. Tvp Ü !. Pm

!. Pz !. gb !. grMz

0 0.5 1 1.5 Miles

!. Pzv

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Sample identified as outlier and removed from ? statistical evaluation; results remain within the qualitative evaluation.

K u

Butte County, California

Figure 3

A2 g

3/7/2019 C:\CalRecycle\Camp Fire\Camp_datadriven_BackgroundSamples_final.mxd TtEMI michelle.handley

.! 006

!. 042

.! 045

!. 047

!. 043

!. 046

.! 048

!. 166

165 .! .!

!. 183 um water !. 049

!. grMz

Ü 0 0.5 1 1.5

Miles !. Pzv

!. Q !. um

Sample identified as outlier and removed from ? statistical evaluation; results remain within the qualitative evaluation.

c

K

Butte County, California

Figure 4

A3

3/7/2019 C:\CalRecycle\Camp Fire\Camp_datadriven_BackgroundSamples_final.mxd TtEMI michelle.handley

!. Tv Impacted Parcel

Ku ?! 022

!. 025

!. 050

!. 051

!. 052

.! 053

Tc

.! 185

.! 072

!. 163

.! 060

.! 059

!. 054

!. 056

!. 057

!. 058

!. 055

.! 076

!. 077

!. 074

.! 07

.! 187

.! 162

.! 164

!. 097

!. 128

.! 161

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0 0.5 1 1.5 Miles

!. Pzv

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Sample identified as outlier and removed from ? statistical evaluation; results remain within the m !

Butte County, California

Figure 5

B1

Mz

3/7/2019 C:\CalRecycle\Camp Fire\Camp_datadriven_BackgroundSamples_final.mxd TtEMI michelle.handley

!. 033

.! 035

!. 031

.! 036

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.! 039

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!. 029

.! 030 gb Pzv

.! 034

!. 061

.! 068

!. 069

!. 071

.! 062

?! 063

!. 067

!. 070

.! 041

!. 066

!. 040

.! 064

.! 079

.! 086

.! 065

.! 080

.! 081

.! 087

.! 038

!. 101

.! 102

.! 103 .! 104

!. 108

.! 109

Tv !. 110

!. 113

.! 072

.! 074

!. 073

!. 078

!. 089

!. 085

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!. 112

!. 111

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.! 096

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!. 093

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!. 119

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!. 131

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!. 151

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0 0.5 1 1.5 Miles

!. Pzv

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Sample identified as outlier and removed from ? statistical evaluation; results remain within the qualitative evaluation.

m .

Camp Fire

Butte County, California

Figure 6

B2

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.! 123

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.! 180

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Pz um

.! 178

?! 142

.! 181

.! 182

!. grMz

Ü 0 0.5 1 1.5

Miles !. Pzv

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Sample identified as outlier and removed from ? statistical evaluation; results remain within the qualitative evaluation.

!. Tv

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Butte County, California

Figure 7

B3

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!. Tv Impacted Parcel

!. 160

.! 152

153 !.!. 188

!. 154

!. Pm

!. Pz !. gb !. grMz

0 0.5 1 1.5 Miles

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Sample identified as outlier and removed from ? statistical evaluation; results remain within the

Butte County, California

Figure 8

C1

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!. Tc

!. 140

.! 137

.! 149 water

.! 148

.! 147

145 !. !. 146

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!. 154 !. 15

Ec

Q .! 186

QPc Tv

!. Pm

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0 0.5 1 1.5 Miles

!. Pzv

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Sample identified as outlier and removed from ? statistical evaluation; results remain within the m .

Butte County, California

Figure 9

C2

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Ü

?! 142

!. 181 !. 182

!. 143

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Pz !. 156

!. 155

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Ec

!. Mzv

!. Tc

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!. Pm

!. Pz !. gb !. grMz

0 0.5 1 1.5 Miles

!. Pzv

!. Q !. um

Sample identified as outlier and removed from ? statistical evaluation; results remain within the qualitative evaluation.

Camp Fire Butte County, California

Figure 10

C3