HomeMy WebLinkAboutlop-soil-characterization-requirementsALAMEDA COUNTY DEPARTMENT OF
ENVIRONMENTAL HEALTH LOCAL OVERSIGHT PROGRAM
Revision Date: August 9, 2019
ISSUE DATE: August 1, 2018
Previous Revisions: October 25, 2018
SUBJECT: Soil Import/Export Characterization Requirements
INTRODUCTION:
This document has been prepared by Alameda County Department of Environmental Health (ACDEH) for
environmental cleanup sites regulated by ACDEH to provide requirements for the characterization of soil to
determine its suitability for use at another site. These requirements have been prepared by ACDEH to ensure that
unsuitable soil is not imported to environmental cleanup sites or exported from environmental cleanup sites to
properties with sensitive land uses. This document is for characterization of soil only and does not address
requirements for characterization of other fill material including, but not limited to: crushed rock, pea gravel,
recycled concrete, or flowable material.
This document addresses both human health and ecological risk associated with exposure pathways to fill material
and identifies fill sources which are unsuitable for use as fill material based on current and historic land use activities.
The protocols and criteria presented in this document are intended to be sufficiently conservative to be applicable
to all soil fill import sites regardless of land use or other site characteristics. Alternative criteria for soil
characterization and suitability may be proposed for consideration by ACDEH via submittal of a site-specific soil
import/export management plan and associated supporting technical documents.
This document was prepared using the structure presented in the California Environmental Protection Agency,
Department of Toxic Substances Control (DTSC) Clean Imported Fill Material Information Advisory (October 2001)
and modified to incorporate use of the San Francisco Bay Regional Water Quality Control Boards (Water Board’s)
Environmental Screening Levels (ESLs), criteria provided to ACDEH by designated Groundwater Basin Managers
within Alameda County; and accepted industry practices for soil characterization.
Section 1 of this document discusses criteria for assessing and identifying potentially suitable fill material sources.
Section 2 discusses the evaluation of the suitability of potential fill material. Section 3 discusses ACDEH’s fill import
suitability determination process. Section 4 describes the conditions and reporting requirements for importing
suitable fill material.
1. ASSESSMENT OF POTENTIALLY SUITABLE FILL MATERIAL SOURCES
Suitable fill material (“Clean Soil”) as defined in this document is soil that will not have an adverse effect on human
health or the environment when imported to the receiving site. Clean Soil must consist solely of natural earth
material (e.g., soil, clay, silt, sand, gravel, rock) and must have concentrations of naturally occurring chemicals that
do not exceed background levels at the receiving site and concentrations of man-made chemicals that do not exceed
applicable risk based screening levels for human health risk, ecological risk (aquatic and terrestrial receptors), and
concerns for nuisance and gross contamination.
Prior to collecting analytical data to confirm suitability of potential fill material, potential source areas should be
screened based on historical land use and material composition. Historic and current land use at, and in the vicinity of, the parcel containing the proposed fill material should be evaluated for environmental impacts to determine the
applicable laboratory analysis that should be conducted to characterize the fill material. This assessment consists of
the review of historical records and typically includes conducting a phase one environmental site assessment (Phase
I ESA) or preliminary environmental assessment (PEA) within six months of the assessment. The assessment should
be sufficient to identify Recognized Environmental Conditions (RECs). RECs are typically associated with the
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production, use, storage, transport, recycling, or disposal of hazardous material or waste at or in the vicinity of the
parcel being evaluated and are used to determine what potential contaminants may be present and therefore should
be analyzed for.
Fill material from parcels with the following conditions are not suitable for use as a proposed fill material source
without additional evaluation and approval from ACDEH beyond what is required in this guidance:
a. Regulated environmental cleanup sites; or
b. Unaddressed or insufficiently addressed RECs; or
c. Current or historic industrial land uses; or
d. Current or historic unacceptable commercial land uses. Unacceptable commercial land uses are operations
that generate revenue through, or that significantly involve:
i. Manufacturing, repairing, or restoring operations; or
ii. Providing maintenance services; or
iii. The use, storage, transport, or disposal of hazardous material or waste.
e. Material containing animal or human waste or debris such as lumber, metal, or refuse.
2. EVALUATION OF FILL MATERIAL SUITABILITY
Proposed fill material source areas that are considered potentially suitable based on the initial screening of historic
and current land use must be sampled, analyzed, and meet applicable environmental and human health risk levels
before a final determination of the suitability of the proposed fill material can be made. Sampling protocols and
strategies, and laboratory analyses vary based on conditions at the location being sampled, the type of compounds that are being evaluated, and the volume of fill material. Samples must be collected and analyzed in a manner
sufficient to characterize the lateral and vertical extents of the proposed fill material source area. Minimum sampling
and analysis requirements to evaluate the suitability of a proposed fill material source area are derived from various
regulatory guidance documents, industry best practices, and requirements from designated Groundwater Basin
Managers within Alameda County which are described in further detail below.
2.1. Minimum Analytical Requirements
Minimum analytical requirements for characterization of potentially suitable fill material proposed for import to a
destination (a) outside of the jurisdiction of Zone 7 Water Agency (Zone 7); or (b) within the jurisdiction of Zone 7
are provided in Table 1a and Table 1b, respectively. Sampling and laboratory analysis must be conducted in
accordance with the following requirements:
a. All analysis must performed in accordance with the United States Environmental Protection Agency’s
(USEPA’s) SW-864 Compendium;
b. Analysis of samples must be completed and reported by an analytical laboratory accredited by the California
State Environmental Laboratory Accreditation Program and the National Environmental Laboratory
Accreditation Program;
c. The laboratory reporting limits must not exceed the screening levels adopted by ACDEH as described in
Section 2.4 below;
d. The laboratory reporting limits must be reported on a dry-weight basis; and
e. The results of the laboratory analysis must be reported in a standard laboratory data package, including a
summary of the quality control and quality assurance sample results and chain of custody documentation.
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2.2. Minimum Sampling Requirements
Sampling for the characterization of potentially suitable fill material must be conducted under the direct charge of
a professional engineer or geologist licensed in the state of California (“Qualified Professional”) and in accordance
with industry best practices including, but not limited to those discussed in the subsections below.
2.2.1. Vapor Forming Compounds
Vapor forming compounds consist of volatile organic compounds (VOCs) and semi-volatile organic compounds
(SVOCs) that readily form a vapor when exposed to air. In order to minimize volatilization of VOCs and SVOCs during
sample collection, and ensure that analytical results are representative of the proposed fill material, discrete samples
must be collected and analyzed in accordance with USEPA Method 5035. Composite sampling is not acceptable for
the evaluation of VOCs and SVOCs.
2.2.2. Composite Sampling
Composite sampling is acceptable under the following conditions:
a. Analysis is for non-vapor forming chemicals;
b. The composite sample is comprised of roughly equivalent masses of each of the discrete samples;
c. Sufficient mass of discrete samples from each of the composited locations are submitted so as to allow for
analysis of the discrete samples; and
d. Each of the discrete samples that comprise the composite sample must be analyzed in the event that the
composite sample exceeds the applicable screening level.
2.2.3. In Situ Characterization
Pre-excavation (e.g., In Situ) characterization of potentially suitable fill material must meet the minimum
requirements provided in Table 2a (for import to a destination outside of the jurisdiction of Zone 7 Water Agency’s jurisdiction) and Table 2b (for import to a destination within the Zone 7 Water Agency’s jurisdiction). Additional
requirements include:
• Characterization of soil lithology in the proposed source area using the Unified Soil Classification System
from the ground surface to the total depth of the proposed excavation for the fill material. The
characterized soil lithology at each sample location must be presented as a soil boring log and must be
reviewed and stamped by a Qualified Professional.
• Collection and analysis of at least one sample from each sample location for every five feet below ground
surface that the proposed fill area extends.
• Characterization of layers of proposed fill material that exhibit significantly different geological
characteristics or lithologies as separate sources. For example, if soil at a site generally consists of clay from
the ground surface to a depth of 3 feet below ground surface with interbedded silts and sands beyond, the
clay layer should be characterized and managed as one source and the interbedded silts and sands should
be characterized as a second source.
• Use of direct push technology for sample collection and analyses for VOCs and SVOCs. Samples collected
for analysis of non-vapor forming compounds may be collected using direct push technology, augers, or
from a bucket, sidewall, or base sample from “pot hole” excavations.
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2.2.4. Stockpile Characterization
The minimum sample quantities for the characterization of potentially suitable fill material that have been excavated
and stockpiled are based on the total volume of the stockpiled fill material and are summarized in Table 3. Stockpiles
must be generated from the same source area, must be segregated by fill material composition, and be located on
the parcel generating the proposed fill material. Samples being analyzed for VOCs and SVOCs must be collected from
at least 1 foot below the exposed surface of the stockpile.
2.3. Conditions Requiring Additional Sampling and Analysis
In addition to the minimum sampling requirements identified above, the following conditions, if present, require
additional sampling and analysis as indicated:
1. Evidence of Contamination – Samples must be collected and analyzed from any locations where there is
evidence of contamination such as strong odors, staining, observable sheen or free product, stressed
vegetation, and/or elevated responses from field screening instruments such as a photoionization detector.
2. Contaminants Associated with Surface Deposition – When characterization for contaminants associated
with surface deposition (e.g., pesticides, herbicides, fungicides, asbestos, and lead) are required for fill
material characterization, representative samples must be collected from surface and near surface soils in
accordance with the following:
• For in situ characterization, one sample should be collected from each of the following intervals from each sample location: 0 to 6 inches below ground surface; 6 inches to 2 feet below ground
surface; and 2 feet to 3 feet below ground surface; and
• For stockpiled fill material, fill material from the surface and near surface (0 to 3 feet below ground
surface) must be segregated from other fill material and characterized as a separate potential fill
source.
3. Groundwater and Saturated Soil – If groundwater or saturated soil is encountered during fill
characterization or excavation, the following additional samples must be collected and analyzed:
• One soil sample per sample location from immediately above the saturated soil (i.e., the capillary
fringe); and
• One groundwater sample from each soil boring, excavation, or dewatering well in which
groundwater is encountered.
4. Dewatering – If dewatering is conducted to support excavation of potentially suitable fill material,
characterization of the fill material must be conducted after dewatering has been implemented and soil is
no longer saturated.
2.4. Screening Levels
To be considered suitable fill material, analytical results of the fill characterization sampling must be less than
applicable environmental and human health risk based screening levels.
2.4.1. Default Screening Levels
ACDEH has adopted the Regional Water Board’s Tier 1 Environmental Screening Levels (ESLs) dated January 2019
(Revison 2) as default screening levels for all constituents with the following exception:
• Arsenic: the screening level for arsenic adopted by ACDEH is 11.00 milligrams of arsenic per kilogram of
sample. This concentration is based on the upper estimate (99th percentile) for regional background levels
of arsenic in the urbanized San Francisco bay region3.
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The use of Tier 1 ESLs as a default screening level is applicable to all sites regardless of land use or other site
characteristics.
2.4.2. Alternative Screening Levels
In the event that fill characterization fails the default screening levels, alternative screening levels may be proposed
for consideration by ACDEH via submittal of a site-specific soil import/export management plan. The soil import
management plan must include a site-specific risk assessment for the receiving location and associated supporting
technical documents.
The use of hazardous waste characteristic of toxicity levels (California Code of Regulations Title 22 Section 66261.24)
as a screening level to evaluate the suitability of the import of soils is unacceptable for all sites except for
appropriately designed and permitted treatment, storage, disposal, or recycling facilities.
3. ACDEH FILL MATERIAL IMPORT SUITABILITY DETERMINATION PROCESS
To obtain a determination from ACDEH that a proposed fill material is suitable, ACDEH requires submittal of a
technical report (the “Fill Material Characterization Report”) documenting the characterization of the proposed fill
material. This technical report must contain, at a minimum, the following elements:
1. A cover letter from the owner of the proposed fill source material with the following statement: “I have
read and acknowledge the content, recommendations, and/or conclusions contained in the attached
document or report submitted on my behalf to ACDEH”. This cover letter must be signed by the owner of
the proposed fill source material or a legally authorized representative of the owner of the proposed fill
source material;
2. A statement that fill material characterization was conducted under the responsible charge of a Qualified
Professional. This statement must be accompanied by the signed and dated seal of the Qualified
Professional with responsible charge;
3. Narrative identifying and summarizing the following elements:
a. The location, assessor’s parcel number, and physical address of the proposed fill material source
area;
b. A summary of historical land uses and operations conducted at and in the vicinity of the proposed
fill material source area with citations for supporting documentation;
c. Identification and description of any identified RECs;
d. A summary of fill material characterization efforts conducted, including a description of sampling and analysis and applicable geology and hydrogeology within the proposed fill material source
area;
e. A summary of the results of analytical sampling; and
f. Recommendations and conclusions for the suitability of the proposed fill material.
4. Tables summarizing the site characterization analytical data;
5. A completed Proposed Fill Material Source Characterization Summary Form. A copy of this form is provided
in pdf in Attachment A. An excel spreadsheet of this form is available on request;
6. Figure(s) depicting the following elements:
a. Sample locations;
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b. Parcel lines and parcel numbers;
c. Lateral extent(s) and depth(s) of the proposed fill material source area(s);
d. Location of any identified RECs;
e. Location of known current and historic infrastructure including structures, roadways, utilities, and
any above ground or below ground storage tanks.
7. Boring logs depicting the geology, sample depths, and any encountered groundwater from each sample
location;
8. Copies of laboratory analytical data;
9. Copies of supporting environmental documents such as Phase I ESA, PEA, or historic subsurface
investigation reports.
The Fill Material Characterization Report and supporting documentation must be submitted to ACDEH via email to
deh.loptoxic@acgov.org and uploaded to the State Water Resources Control Board’s GeoTracker database. ACDEH
will review the Fill Material Characterization Report and will issue a directive letter that (a) determines that the
proposed fill material is suitable for import/export; (b) requests additional characterization; or (c) determines that
the proposed fill material is not suitable for import/export. ACDEH’s determination will include conditions described
in Section 4 and may include additional conditions or requirements.
4. CONDITIONS OF ACDEH FILL MATERIAL IMPORT SUITABILITY DETERMINATION
As a condition of import/export, a technical report be submitted to ACDEH via email and uploaded to GeoTracker
documenting the import/export of soil (the “Soil Import Summary Report”). The report must be uploaded to the GeoTracker information repositories for both the fill material source area and the destination. Please note that for
locations importing soil from multiple sources, a single report can be submitted that documents import from
multiple sources. For locations in which soil import activities last more than one year, a Soil Import Summary Report
must be submitted on a semi-annual basis for the duration of import activities. The Soil Import Summary Report
must contain the following elements at a minimum:
1. A cover letter from the owner of the proposed fill source material that states, at a minimum, the following:
“I have read and acknowledge the content, recommendations, and/or conclusions contained in the
attached document or report submitted on my behalf to ACDEH.” This cover letter must be signed by the
owner of the proposed fill source material or a legally authorized representative of the owner of the
proposed fill source material;
2. The technical report must include a statement that fill material characterization was conducted under the
responsible charge of a Qualified Professional. This statement must be accompanied by the signed and
dated seal of the Qualified Professional with responsible charge;
3. Summary tables of soil import logs. These logs must include the following information for each delivery of
fill material: arrival date, manifest number or truck tag, quantity of fill material delivered, originating facility,
and profile number;
4. A figure depicting the location and depth of imported soil. If fill material from multiple sources has been
imported, the location and depth of imported soil from each source must be distinguished;
5. Copies of all manifests or other documentation of soil import as an appendix; and
6. Copies of all fill characterization profiles as an appendix.
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5. CLOSING
If you have questions or comments regarding the requirements presented in this document, please contact ACDEH’s
Local Oversight Program for Releases of Hazardous Materials at 510-567-6700.
This document was prepared by, or under the direction of, the undersigned.
Dilan Roe, P.E. C73703
Chief
Land Water Division
Jonathan Sanders
Senior Hazardous Materials Specialist
Local Oversight and Site Cleanup Program
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ENCLOSURES
Tables
Table 1a Minimum Required Analyses for Characterization of Fill Material for Off-Site Reuse for
Receiving Facilities Located outside of Zone 7 Water Agency Jurisdictional Boundaries
Receiving Facilities Located within Zone 7 Water Agency Jurisdictional Boundaries
Characterization of Proposed Fill Material Sources for Receiving Facilities Located outside
of Zone 7 Water Agency’s Jurisdictional Boundaries
Characterization of Proposed Fill Material Sources for Receiving Facilities Located within
Zone 7 Water Agency’s Jurisdictional Boundaries
Characterization of Proposed Fill Material Sources
Appendices
REFERENCES
1. DRAFT Technical Reference Document: Characterization and Reuse of Petroleum Hydrocarbon Impact Soil
as Inert Waste. San Francisco Bay Regional Water Quality Control Board. October 2006.
2. Environmental Screening Levels (ESLs) revision 2. San Francisco Bay Regional Water Quality Control Board.
January 2019.
3. Establishing Background Arsenic in Soil of the Urbanized San Francisco Bay Region. Duverge. December
2011
4. Information Advisory: Clean Imported Fill Material. Department of Toxic Substances Control (DTSC).
October 2001.
5. Interim Guidance for Sampling Agricultural Properties revision 3. Department of Toxic Substances Control.
August 7, 2008.
6. Preliminary Endangerment Assessment Guidance Manual. Department of Toxic Substances Control. January
1994. Revised October 2015.
TABLES
Table 1a Minimum Required Analyses for Characterization of Fill Material for Off-Site Reuse
for Receiving Facilities Located outside of Zone 7 Water Agency Jurisdictional Boundaries
Adapted from Department of Toxic Substances Control’s Information Advisory Clean Imported Fill Material dated October 2001. Notes:
(1) All analysis should be performed in accordance with USEPA SW-846 methods. A standard laboratory data package, including a summary of the QA/QC (Quality Assurance/Quality Control) sample results must accompany all analytical reports; (2) Acceptable commercial land use excludes any commercial use that generates revenue from manufacturing, repair/restoration, maintenance/cleaning, or the storage/transport of hazardous materials; (3) Existing homogeneous engineered fill. Fill containing waste or debris or that is heterogeneous is not acceptable for off-site reuse.
(4) Include when Hexavalent Chromium analysis required by USEPA method 7199 (5) Analysis required by Alameda County Department of Environmental Health; Abbreviations: USEPA -United States Environmental Protection Agency
N/A – Not Acceptable for off-site re-use
PLM – Polarized Light Microscopy OSHA – Occupational Safety and Health Administration Testing Method Number SIM – Selected Ion Monitoring
VOCs – Volatile Organic Compounds
SVOCs – Semi-Volatile Organic Compounds PAHs – Poly Aromatic Hydrocarbons TPH – Total Petroleum Hydrocarbons as reported for gasoline range, diesel range, and motor oil range PCBs – Polychlorinated Biphenyls;
Current and Historic Land Use At or Within 500 Feet of Fill Source Area Current and Historic Land Use at Parcel(s) Containing Fill Source Area Existing
Analysis(1)
California Title 22
Metals (4)
Asbestos
Analytical Method
USEPA 6010B and/or
USEPA 7471A
PLM or
OSHA 191
USEPA 9045D
USEPA 8141A; and
USEPA 8151A; and
USEPA 8081A or
8080A
USEPA 8260B with
collection by
USEPA 5035
Major Roadway or Mining Area orFreeway Rock Quarry X X (Lead Only) X
(PLM)
Regulated Cleanup Site and RECs
Additional As
Required
Additional As
Required
Additional As
Agricultural Residential / Acceptable Commercial(2)
X
X
Historic Engineered Fill(3)
X(5)
Industrial / Unacceptable Commercial
Required
Required
Required
Only)
(5)
(5)
Table 1b Minimum Required Analyses for Characterization of Fill Material for Off-Site Reuse
for Receiving Facilities Located within Zone 7 Water Agency Jurisdictional Boundaries
Adapted from Department of Toxic Substances Control’s Information Advisory Clean Imported Fill Material dated October 2001. Notes:
(1) All analysis should be performed in accordance with USEPA SW-846 methods. A standard laboratory data package, including a summary of the QA/QC (Quality Assurance/Quality Control) sample results must accompany all analytical reports; (2) Acceptable commercial land use consist excludes any commercial use that generates revenue from manufacturing, repair/restoration, maintenance/cleaning, or the storage/transport of hazardous materials; (3) Existing homogeneous engineered fill. Fill containing waste or debris or that is heterogeneous is not acceptable for off-site reuse.
(4) Include when Hexavalent Chromium analysis required by USEPA method 7199
(5) Analysis required by Alameda County Department of Environmental Health; (6) Analysis required by Zone 7 Water Agency
Abbreviations:
USEPA -United States Environmental Protection Agency
N/A – Not Acceptable for off-site re-use PLM – Polarized Light Microscopy OSHA – Occupational Safety and Health Administration Testing Method Number
SIM – Selected Ion Monitoring
VOCs – Volatile Organic Compounds SVOCs – Semi-Volatile Organic Compounds PAHs – Poly Aromatic Hydrocarbons
TPH – Total Petroleum Hydrocarbons as reported for gasoline range, diesel range, and motor oil range
PCBs – Polychlorinated Biphenyls;
Current and Historic Land Use At or Within 500 Feet of Fill Source Area Current and Historic Land Use at Parcel(s) Containing Fill Source Area Existing
Analysis(1)
California Title 22
Metals (4)
Analytical Method
USEPA 6010B
USEPA 7471A
PLM or
OSHA 191
USEPA 9045D
USEPA 8141A; and
USEPA 8151A; and
USEPA 8081A or
8080A
USEPA 8260B with
collection by
USEPA 5035
Major Roadway or Mining Area orFreeway Rock Quarry X X (Lead Only) X
(PLM)
Regulated Cleanup Site and RECs
Additional As
Required
Additional As
Required
Additional As
Agricultural Residential / Acceptable Commercial(2)
X
X
Historic Engineered Fill(3)
X(5, 6)
Industrial / Unacceptable Commercial
Required
Required
Required
Only)
(5, 6)
(5, 6)
Table 2a
Minimum Required Sample Density and Spacing for In Situ (Pre-excavation) Characterization of Proposed Fill Material Sources
for Receiving Facilities Located outside of Zone 7 Water Agency’s Jurisdictional Boundaries
Contiguous Minimum Lateral Sample
(1) Additional lateral sample locations may be required to address identified
RECs;
(2) Additional samples must be collected from fill material that exhibits signs
of potential contamination (e.g., strong odor, staining, presence of sheen
or free product, stressed vegetation in the vicinity, elevated response
from photo-ionization detector);
(3) Fill source area cannot be located on parcel(s) with historic industrial or unacceptable commercial land uses or parcel(s) associated with regulated
environmental cleanup sites unless approved by regulatory oversight agency;
(4) Samples that are collected, but not planned for analysis must be
submitted with the samples planned for analysis under chain of custody
to an appropriately certified analytical laboratory. The samples that are
not planned for analysis must remain on hold with the laboratory until
ACDEH has issued a determination regarding the suitability of fill material
for import and released the un-analyzed samples for disposal;
(5) When contaminants associated with surface deposition (e.g. pesticides, asbestos, and lead) are required to be evaluated, ACDEH requires the
following additional samples be collected from each sample location: One sample from 0 to 6 inches bgs, One sample from 6 inches to 2 feet bgs, One sample from 2 feet to 3 feet bgs. One of these samples must be selected for analysis for each sample location;
(6) If groundwater is encountered, ACDEH requires the following additional
samples be collected and analyzed: One sample per Sample Location
from immediately above the saturated fill material (i.e., the capillary
fringe); One groundwater sample must be collected and analyzed for
each boring, excavation, or dewatering well in which groundwater is
encountered.
(7) If dewatering will be conducted to support excavation below an existing water table, ACDEH requires that historically saturated fill material be samples after dewatering is in effect.
(8) Composite sampling may or may not be appropriate, depending on the
quality and homogeneity of the source/borrow area and compounds of
concern.
<2.0 acres
4 sample locations.
AND
Sample Locations must be
distributed throughout the fill
material source area.
1 sample collected and analyzed per sample location.
AND
1 sample collected and analyzed for every 5 feet bgs.
AND
1 sample collected from each layer exhibiting different
geological characteristics or lithology encountered.
>2.0 acres
<4.0 acres
1 sample location per 0.5 acre.
AND
Sample Locations must be
distributed throughout the fill
material source area.
1 sample collected and analyzed per sample location.
AND
1 sample collected and analyzed for every 5 feet bgs.
AND
1 sample collected from each layer exhibiting different
geological characteristics or lithology encountered.
>4 acres
<10.0 acres
8 sample locations.
AND
Sample Locations must be
distributed throughout the fill
material source area.
1 sample collected and analyzed per sample location.
AND
1 sample collected and analyzed for every 5 feet bgs.
AND
1 sample collected from each layer exhibiting different geological characteristics or lithology encountered.
>10.0 acres
8 sample locations.
AND
Sample Locations must be distributed throughout the fill material source area.
4 sample collected and analyzed per sample location.
AND
1 sample collected and analyzed for every 5 feet bgs.
AND
1 sample collected from each layer exhibiting different
geological characteristics or lithology encountered.
Table 2b
Minimum Required Sample Density and Spacing for In Situ (Pre-excavation) Characterization of Proposed Fill Material Sources
for Receiving Facilities Located within Zone 7 Water Agency’s Jurisdictional Boundaries
Contiguous Minimum Lateral Sample
(1) Additional lateral sample locations may be required to address identified
RECs
(2) Additional samples must be collected from fill material that exhibits signs
of potential contamination (e.g., strong odor, staining, presence of sheen
or free product, stressed vegetation in the vicinity, elevated response
from photo-ionization detector)
(3) Fill source area cannot be located on parcel(s) with historic industrial or unacceptable commercial land uses or parcel(s) associated with regulated
environmental cleanup sites unless approved by regulatory oversight agency;
(4) Samples that are collected, but not planned for analysis must be
submitted with the samples planned for analysis under chain of custody
to an appropriately certified analytical laboratory. The samples that are
not planned for analysis must remain on hold with the laboratory until
ACDEH has issued a determination regarding the suitability of fill material
for import and released the un-analyzed samples for disposal;
(5) When contaminants associated with surface deposition (e.g. pesticides, asbestos, and lead) are required to be evaluated, ACDEH requires the
following additional samples be collected from each sample location: One sample from 0 to 6 inches bgs; One sample from 6 inches to 2 feet bgs; and One sample from 2 feet to 3 feet bgs. One of these samples must be selected for analysis for each sample location;
(6) If groundwater is encountered, ACDEH requires the following additional
samples be collected and analyzed: One sample per Sample Location
from immediately above the saturated fill material (i.e., the capillary
fringe); One groundwater samples must be collected and analyzed for
each boring, excavation, or dewatering well in which groundwater is
encountered.
(7) If dewatering will be conducted to support excavation below an existing water table, ACDEH requires that, historically saturated fill material be samples after dewatering is in effect.
(8) Composite sampling may or may not be appropriate, depending on the
quality and homogeneity of the fill material and compounds of concern.
<2.0 acres
8 sample locations.
AND
Sample Locations must be
distributed throughout the fill
material source area.
1 sample collected and analyzed per sample location.
AND
1 sample collected and analyzed for every 5 feet bgs.
AND
1 sample collected from each layer exhibiting different
geological characteristics or lithology encountered.
>2.0 acres
<4.0 acres
1 sample location per 0.25 acre.
AND
Sample Locations must be
distributed throughout the fill
material source area.
1 sample collected and analyzed per sample location.
AND
1 sample collected and analyzed for every 5 feet bgs.
AND
1 sample collected from each layer exhibiting different
geological characteristics or lithology encountered.
>4 acres
<10.0 acres
16 sample locations.
AND
Sample Locations must be
distributed throughout the fill
material source area.
1 sample collected and analyzed per sample location.
AND
1 sample collected and analyzed for every 5 feet bgs.
AND
1 sample collected from each layer exhibiting different geological characteristics or lithology encountered.
>10.0 acres
16 sample locations.
AND
Sample Locations must be distributed throughout the fill material source area.
4 sample collected and analyzed per sample location.
AND
1 sample collected and analyzed for every 5 feet bgs.
AND
1 sample collected from each layer exhibiting different
geological characteristics or lithology encountered.
Table 3
Minimum Required Sample Density and Spacing for Stockpile (Post-Excavation) Characterization of Proposed Fill Material Sources for Receiving Facilities
(1) Top Soil (0 to 6 inches bgs) and near surface soil (6 inches to 3 feet bgs) must be stockpiled separately if sampling for contaminants associated with surface
deposition (e.g. pesticides, asbestos, and lead) (0-6 inches below ground surface) is required;
(2) 4-point composite samples may be used in lieu of discrete samples for analysis other than VOCs and SVOCs, however, the total number of samples must be preserved;
(3) VOC and SVOC samples are to be collected from fill material at least 1 foot
into the stockpile;
<1,000 yd3
1 sample collected and analyzed per 250 cubic yards of stockpiled fill material.
>1,000 yd3 & <5,000 yd3
4 samples collected and analyzed for first 1,000 cubic yards
AND
1 sample for each additional 500 cubic yards.
>5,000 yd3
12 samples collected and analyzed for first 5,000 cubic yards
AND
1 sample for each additional 1,000 cubic yards.
ATTACHMENT A
Proposed Fill Material Source Characterization Summary Form
Proposed Fill Material Source Characterization Summary Form
Ph
a
se 1 ES
A
or
PE
A
Con
d
u
cted
Und
evel
oped
Re
sident
ial
pt
a
b
le Comm
e
r
c
i
al
(1
)
Una
cc
e
pt
a
b
le Comm
e
r
c
i
al
(2
)
str
ial
E
Hi
s
t
o
r
i
c
Fi
l
l
ulat
ed En
v
iro
n
me
nt
a
l
Cl
e
an
u
p
Si
te
(3
)
Ro
a
d
way
/ Fr
ee
w
ay
(3
)
Ar
ea or
Ro
c
k
Qu
a
r
r
y
(3
)
Ce
ll
ID
Wi
d
t
h
(fe
e
t)
Excavat
ion
Length
(f
e
e
t)
Dept
h
(fe
e
t)
Nu
mber of
So
i
l
La
y
ers
Id
ent
i
fied
ID
Vo
l
u
me (y
d3)
Pi
t
Con
str
u
ction
Si
te
Yar
d
ycl
i
ng
Fa
c
i
l
i
t
y
Agg
reg
at
e
(san
d
an
d
/or
gra
v
el
)
Cru
shed Asph
a
lt
Cru
shed Con
crete
Con
str
u
ction
De
br
is
U
wn
ert
y
wit
h
i
n
ju
r
i
sdi
c
t
i
o
n
of
Zo
n
e
7
ert
y
wit
h
i
n
ju
r
i
sdi
c
t
i
o
n
of
ACWD
Prop
ert
y
ou
t
sid
e
Zo
n
e
7 or
ACWD
ju
r
i
sdi
c
t
i
o
n
Permit
t
ed TSDF
ia Ti
t
l
e
22
Me
t
a
l
s
Asbe
sto
s
pH
des
TPH
Historic Land Use and identification of RECs Source Information Source Information Classification
Fill Type
Fill Destination
(4)
Are RECs, CRECs, or HRECs associated with any parcels? If so, what parcels, and what are the associated COCs?
If Fill Source Area is a regulated environmental cleanup site, provide case identification information and regulatory oversight agency soil export requirements
Notes:
(1) Commercial activities that do not meet the Unacceptable Commercial criteria. Typically, Acceptable Commercial facilities are retail, restaurants or service providers (professional, legal, integrated technology, etc..).
(2) Commercial activities that generate revenue through or that significantly involve manufacturing, repairing, restoring, or providing maintenance services or the transport, storage, and disposal of hazardous materials.
(3) Land use at or within 500 feet of the parcel(s) containing the fill source
(4) Does not include additional sampling that may be required by the regulatory oversight agency overseeing the environmental cleanup site where the fill source is located
* Fill inappropriate or not proposed for off-site reuse at this time and must be disposed of at a permitted TSDF. Please consult with a permitted TSDF for sampling requirements for acceptance by the TSDR.
ACWD Alameda County Water District
APN Assessors Parcel Number
AR As required by accepting permitted TSDR
CRECs Controlled Recognized Environmental Condition as defined in ASTM E1527-13
HREC Historic Recognized Environmental Condition as defined in ASTM E1527-13
REC Recognized Environmental Condition as defined in ASTM E1527-13
TSDF Treatment, Storage, or Disposal Facility, defined as a "Designated Facility" in Title 22, Section 66260.10 of the California Code of Regulations.
Zone 7 Zone 7 Water Agency