HomeMy WebLinkAbout12567-R-GEOT-Hart Crowser-2016-11-29
3131 Elliott Avenue, Suite 600
Seattle, Washington 98121
Tel 206.324.9530
MEMORANDUM
DATE: November 29, 2016
TO: Rob Reifsnyder, PACCAR
FROM: Rolf B. Hyllseth, PE and Garry E. Horvitz, PE
RE: Geotechnical Report Update – SW Fill Area
PACCAR Renton Parts Distribution Center (PDC)
Renton, Washington
17946‐02
CC: Jason Hubbell, Barghausen Engineers
Vicki Zumbrunnen, PACCAR
As requested by the City of Renton, this memorandum provides updated geotechnical engineering
recommendations for the SW Fill Area of the PDC project site, located adjacent to Garden Avenue North
and North 4th Street as shown on the Barghausen Phase 3 Temporary Erosion Control and Grading Plans
for the project (dated November 15, 2016).
The fill placed in this portion of the site consists of relocated preload fill material from the original PDC
building pad. Hart Crowser monitored the preload fill placement and removal process during
construction. The updated recommendations in this memorandum should only be used in conjunction
with the general recommendations of our geotechnical engineering design study dated September 25,
2014, and subsequent supplemental recommendations provided by Hart Crowser.
This memorandum is for the exclusive use of PACCAR, Barghausen Engineers, and their consultants for
specific application to the subject project and site. We completed this memorandum in accordance with
geotechnical practices generally accepted for work of a similar nature done in the same timeframe, in
the same or similar localities, and under similar conditions. No other warranty, express or implied, is
made.
SW Fill Placement Recommendations
The fill placed in the SW portion of the site is considered non‐structural (i.e. not intended to support
buildings, paved roads, or other surface structures). As such, geotechnical field observation or
compaction testing was not required during placement. It is our opinion that track‐walking the fill
PACCAR 17946‐02
November 29, 2016 Page 2
material with construction equipment during placement has provided adequate compaction for the
intended purpose. We are not aware of any current plans to redevelop this portion of the site. If site
development is considered for this portion of the site in the future, the building pad will be reevaluated
for potential building support by the geotechnical engineer at that time.
We understand that the current 2H:1V (Horizontal:Vertical) fill slopes along Garden Avenue will be
flattened to 4H:1V as part of the current regrading effort. This will improve long‐term stability of this
portion of the fill. We recommend that the exposed soil along the new slopes be revegetated as soon as
possible following regrading, to minimize the risk of erosion and sedimentation runoff.
The proposed regrading along the west edge of the SW fill area (Garden Avenue side) may expose
previously placed and covered contaminated soil. Such potentially exposed contaminated soil should be
managed (relocated if necessary) and capped by a minimum 1‐foot thick clean soil cap layer, according
to the existing contaminated soil handling protocols for the site.
On-site Infiltration Potential
Because of the fine‐grained nature of the near‐surface soils and presence of contaminated soils (below
protective clean soil cap), the site is not considered suitable for on‐site stormwater infiltration.
Fill Source Statements
The material placed in the SW fill area consists of previously imported preload fill used for the PDC
building construction. The original City of Renton Fill Source Statements submitted for this imported
preload fill are attached to this memorandum for reference.
Attachment:
Fill Source Statements
L:\Notebooks\1794602_PACCAR PDC Construction\Deliverables\Memos\Geotech Report Update Memo\Geotechnical Report Update
Memorandum.docx
H/PW/CED/Data/Forms-Templates/Self Help Handouts/Pubic Works/Fill Source Statement.doc 09/11
FILL SOURCE
STATEMENT
FOR PROJECTS IN THE AQUIFER
PROTECTION AREA (APA)
CITY OF RENTON
Development Services Division
1055 South Grady Way, Renton WA 98055
Phone: (425) 430-7200
A Fill Source Statement CERTIFIED BY A PROFESSIONAL ENGINEER OR GEOLOGIST
licensed in the State of Washington is required in the following circumstances:
1. More than 50 cubic yards of fill will be imported to a project site located in Zone 1
of the Aquifer Protection Area.
2. More than 100 cubic yards of fill will be imported to a project site located in Zone 2
of the Aquifer Protection Area.
Exception: A Fill Source Statement is not required if documentation is provided that the fill
to be imported comes from a Washington Department of Transportation approved source.
It is required that fill material be sampled AT THE FILL SOURCE SITE and analyzed by a
laboratory to rule out contamination. See 11 below. A fill source site may qualify for an
ABBREVIATED FILL SOURCE STATEMENT if the source site has never been filled,
developed, or subjected to use that could have introduced chemical contamination to the
site. The abbreviated format does not require sampling and analysis of fill to detect
contamination and, therefore, reduces applicant costs. Please use attached form entitled
“Abbreviated Fill Source Statement”.
A SEPARATE SOURCE STATEMENT IS REQUIRED FOR EACH FILL SOURCE SITE.
A copy of the Renton Municipal Code section requiring the Fill Source Statement is attached
for your information. (RMC 4-4-060L4).
CONTACT THE DEVELOPMENT SERVICES DIVISION TO DETERMINE IF YOUR
PROJECT SITE IS LOCATED IN THE APA.
NOTE: The Department has the authority to request additional information regarding
imported fill material and to reject a source statement if it does not demonstrate that the fill
material meets City standards and/or the Department has reason to suspect that the fill
material could be contaminated. Such requests or rejections shall be made in writing to the
applicant.
1. Project Site Address:
2. Project Site King County Tax Assessor Account Number:
3. In which Aquifer Protection Area Zone is the project site located, 1 or 2?
4. Cubic yards of fill to be imported to project site:
5. Project applicant name:
6. Fill source site address:
7. Fill source site King County Tax Assessor Account Number:
Table 1: Results of Source Fill Characterization Sampling and Analysis5th and ColumbiaSample #Kerosene/Jet FuelDiesel/Fuel Oil Heavy OilVolatile Organic Compounds (ug/kg) cPAHs (ug/kg) Arsenic Chromium LeadP20‐24 20 U20 U50 U‐‐ ‐‐1 U 2.3 3.4P35‐40 20 U20 U50 U‐‐ ‐‐1 U 2.4 2.7P31‐44 20 U20 U50 UND ND1 U 2U 2.6P65‐50 20 U20 U50 UND ND1 U 2U 3.4P50‐58 20 U20 U50 U‐‐ ‐‐1 U 2U 2.1P89‐83 20 U20 U50 U ND* ND 1 U 2U 3.3P78‐87 20 U20 U50 U‐‐ ‐‐1 U 2U 2.7P69‐92 20 U20 U50 U‐‐ ‐‐1 U 2U 2.4P13‐90 20 U20 U50 U‐‐ ‐‐1 U 2U 2.8Note: Soil samples collected from 5th and Columbia Construction Site on January 2, 2015 U ‐ not detected at concentration limit specified ND ‐ not detected* ‐ 1,2,4‐Trimethylbenzene detected at concentration of 82 ug/kgNWTPH‐Dx (mg/kg) Metals (mg/kg)
H/PW/CED/Data/Forms-Templates/Self Help Handouts/Pubic Works/Fill Source Statement.doc 09/11
Renton Municipal Code 4-4-060
Grading, Excavation, and Mining Regulations
L. FILLS:
1. Applicability and Exemptions: Unless otherwise recommended in the approved soil
engineering report, fills shall conform to the provisions of this Section. In the absence
of an approved soil engineering report, these provisions may be waived for minor fills
not intended to support structures. For minor fills or waste areas, humps, hollows or
water pockets shall be graded smooth with acceptable slopes.
2. Fill Location: Fill slopes shall not be constructed:
a. On natural slopes steeper than two-and-one-half horizontal to one vertical (2.5:1)
that are fifteen feet (15') or greater in height (except in conjunction with a
modification granted per RMC 4-9-250D1 for filling against the toe of a natural
rock wall - see RMC 43-060N2a(ii)(2)); or
b. Where the fill slopes toes out within twelve feet (12') horizontally of the top of
existing or planned cut slopes that are fifteen feet (15') or greater in height and
steeper than two-and-one-half horizontal to one vertical (2.5:1).
(Amd. Ord. 4835, 3-27-2000; Ord. 4851, 8-7-2000)
3. Preparation of Ground: The ground surface shall be prepared to receive fill by
removing vegetation, noncomplying fill, topsoil and other unsuitable materials as
determined by the soil engineer, and where the slopes are five to one (5:1) or
steeper, by benching into sound bedrock or other competent material.
4. Fill Material: Fill materials shall have no more than minor amounts of organic
substances and shall have no rock or similar irreducible material with a maximum
dimension greater than eight inches (8"). Fill material shall meet the following
requirements:
a. Construction, Demolition, and Land Clearing Waste Prohibited: Fill material shall
be free of construction, demolition, and land clearing waste except that this
requirement does not preclude the use of recycled concrete rubble per
Washington State Department of Transportation Standard Specifications for
Road, Bridge, and Municipal Construction.
b. Cleanliness of Fill Material: Fill material shall not contain concentrations of
contaminants that exceed cleanup standards for soil specified in WAC 173-340-
740, Model Toxics Control Act, regardless of whether all or part of the
contamination is due to natural background levels at the fill source site. For
project sites located in Zone 1 of the Aquifer Protection Area, fill material shall
not contain detectable concentrations of petroleum per the definition of Class 1
Soils contained in Table V in "Guidance for Remediation of Petroleum
Contaminated Soils" published by the Department of Ecology. Where the
detection limit (lower limit at which a chemical can be detected by a specified
laboratory procedure) for a particular soil contaminant exceeds the cleanup
standard for soil specified in WAC 173-340-740, then the detection limit shall be
the standard for fill material quality. Detection limits shall be a published by the
Department of Ecology in the current version of "TABLE II: SOIL, Method
Detection Limits, Practical Quantitation Limits, and Comparison of Method B
Values" or other source of information accepted by the Department if the Ecology
publication does not address the contaminant.
H/PW/CED/Data/Forms-Templates/Self Help Handouts/Pubic Works/Fill Source Statement.doc 09/11
c. Special Requirement for Projects Located in Zone 1 of the Aquifer Protection
Area and Which Will Involve Placement of More than Fifty (50) Cubic Yards of
Imported Fill: A source statement certified by a professional engineer licensed in
the State of Washington shall be provided to the Department and shall be
reviewed and accepted by the Department prior to stockpiling or grading
imported fill at the project site. The source statement, as defined in RMC 4-8-
120D19, shall be required for each source location from which imported fill will be
obtained. (Amd. Ord. 4851, 8-7-2000)
d. Special Requirement for Projects Located in Zone 2 of the Aquifer Protection
Area and Which Will Involve Placement of more than One Hundred (100) Cubic
Yards of Imported Fill: The source statement described in RMC 4-8-120D19 is
required for each source location from which imported fill will be obtained. (Amd.
Ord. 4851, 8-7-2000)
e. Abbreviated Source Statement for Aquifer Protection Area: The Department may
accept a source statement, as defined in RMC 4-8-120D19, that does not include
results of sampling and analysis of imported fill if it determines that adequate
information is provided indicating that the source location is free of
contamination. In addition to the information otherwise required by subsection as
defined in RMC 4-8-120D19, such information may include, but is not limited to:
i. Results of field testing of earth materials to be imported to the site with
instruments capable of detecting the presence of contaminants; and
ii. Results of previous sampling and analysis of earth materials to be imported
to the site. (Amd. Ord. 4851, 8-7-2000)
f. Source Statement Not Required for Imported Fill Obtained from Washington
State Department of Transportation Approved Source: The source statement
defined in RMC 4-8-120D19 is not required for those projects located in the
aquifer protection area if contractual documents confirm that imported fill will be
obtained from a Washington State Department of Transportation approved
source. (Amd. Ord. 4851, 8-7-2000)
g. Sampling and Analysis Procedures: The professional engineer or person under
the professional engineer's supervision who samples earth materials to be used
as imported fill, oversees analysis, and prepares the source statement required
by subsections L4c and L4d of this Section shall follow procedures specified in
WAC 173-340-820 and 173-340-830 of the Model Toxics Control Act Cleanup
Regulation and "Guidance on Sampling and Data Analysis Methods" published
by the Department of Ecology for earth materials potentially contaminated with
hazardous materials other than petroleum. Procedures specified in "Guidance for
Remediation of Petroleum Contaminated Soils" published by the Department of
Ecology shall be followed for earth materials potentially contaminated with
petroleum.
h. Permittee Subject to Required Actions after Illegal Placement of Imported Fill. A
permittee who stockpiles or grades imported fill at the site without Department
review and acceptance of the source statement required by subsections L4c and
L4d of this Section or who stockpiles or grades fill at the site that does not meet
the fill quality requirements of subsections L4a and L4b of this Section is subject
to measures specified by the Department to reduce risk of contamination of the
site due to illegal placement of fill. Such measures may include, but are not
limited to, any or all of the following and shall be implemented at the permittee's
expense:
H/PW/CED/Data/Forms-Templates/Self Help Handouts/Pubic Works/Fill Source Statement.doc 09/11
1. Provide the Department with a source statement meeting the requirements of
subsection L4c of this Section within a time-period specified by the
Department;
2. Immediately cover fill with a waterproof cover;
3. Immediately remove fill;
4. Installation of monitoring wells and monitoring of ground water quality;
5. Remediation of contamination of the site caused by the illegal placement of
fill according to a schedule specified by the Department and in accordance
with cleanup standards for soil and groundwater described in the Model
Toxics Control Act Cleanup Regulation, Chapter 173-340.
i. Department Authority to Conduct Independent Sampling and Analysis: The
Department shall have the authority to enter on to private property to conduct
independent sampling and analysis of fill. If the Department determines that fill
does not meet fill quality standards of subsections L4a and L4b of this Section,
then it may require the permittee to accomplish any or all of the measures listed
in part h. of this subsection at his or her own expense.
j. Department Authority to Implement Removal and Remediation Measures: The
Department or its authorized agents shall have the authority to implement
measures listed in subsection L4h of this Section if the permittee fails to
accomplish such measures in a timely manner. The permittee shall be
responsible for any costs incurred by the Department or its authorized agents in
the conduct of such activities. (Amd. Ord. 4740, 7-19-1999)
5. Minimum Compaction: All fills shall be compacted to a minimum of ninety five
percent (95%) of maximum density as determined by American Public Works
Association (APWA) specifications. Field density shall be determined in accordance
with APWA standards.
6. Maximum Slope: The slope of fill surfaces shall be no steeper than is safe for the
intended use. Except in conjunction with a modification granted per RMC 4-9-250D1
for one of the circumstances listed in RMC 4-3-050N2a(ii) (Geologic Hazards -
Modifications), fill operations associated with a plat, short plat, subdivision or
dedication, or other permitted land development activity which would result in the
creation of permanent slopes forty percent (40%) or greater which are fifteen feet
(15') in height, i.e., protected slopes, shall not be approved. (Amd. Ord. 4835,3-27-
2000)
7. Drainage and Terracing: Drainage and terracing shall be provided and the area
above fill slopes and the surfaces of terraces shall be as required by subsection N of
this Section.
H/PW/CED/Data/Forms-Templates/Self Help Handouts/Pubic Works/Fill Source Statement.doc 09/11
Renton Municipal Code 4-8-120D
Definitions of terms used in submittal requirements for Building, Planning, and Public
Works permit applications
19. Definitions A
Source Statement, Fill Material, Aquifer Protection Area: A source statement providing the
following information:
a. The source location of imported fill;
b. Previous land uses of the source location;
c. Whether or not earth materials to be removed from the source location are native,
undisturbed soil;
d. Whether or not the source location appears on government lists of contaminated
sites including those developed pursuant to the State Model Toxics Control Act and
the Federal Comprehensive Environmental Response, Compensation, and Liability
Act;
e. Results of sampling and analysis pursuant to RMC 4-4-060L4g, Fill Material, Sample
and Analysis Procedures; and
f. Whether or not imported fill meets fill quality standards described in RMC 4-4-
060L4a, Fill Material, Construction, Demolition and Land Clearing Waste Prohibited,
and RMC 4-4-060L4b, Fill Material, Cleanliness of Fill Material. (Ord. 4851, 8-7-
2000)
H/PW/CED/Data/Forms-Templates/Self Help Handouts/Pubic Works/Fill Source Statement.doc 09/11
FILL SOURCE
STATEMENT
FOR PROJECTS IN THE AQUIFER
PROTECTION AREA (APA)
CITY OF RENTON
Development Services Division
1055 South Grady Way, Renton WA 98055
Phone: (425) 430-7200
A Fill Source Statement CERTIFIED BY A PROFESSIONAL ENGINEER OR GEOLOGIST
licensed in the State of Washington is required in the following circumstances:
1. More than 50 cubic yards of fill will be imported to a project site located in Zone 1
of the Aquifer Protection Area.
2. More than 100 cubic yards of fill will be imported to a project site located in Zone 2
of the Aquifer Protection Area.
Exception: A Fill Source Statement is not required if documentation is provided that the fill
to be imported comes from a Washington Department of Transportation approved source.
It is required that fill material be sampled AT THE FILL SOURCE SITE and analyzed by a
laboratory to rule out contamination. See 11 below. A fill source site may qualify for an
ABBREVIATED FILL SOURCE STATEMENT if the source site has never been filled,
developed, or subjected to use that could have introduced chemical contamination to the
site. The abbreviated format does not require sampling and analysis of fill to detect
contamination and, therefore, reduces applicant costs. Please use attached form entitled
“Abbreviated Fill Source Statement”.
A SEPARATE SOURCE STATEMENT IS REQUIRED FOR EACH FILL SOURCE SITE.
A copy of the Renton Municipal Code section requiring the Fill Source Statement is attached
for your information. (RMC 4-4-060L4).
CONTACT THE DEVELOPMENT SERVICES DIVISION TO DETERMINE IF YOUR
PROJECT SITE IS LOCATED IN THE APA.
NOTE: The Department has the authority to request additional information regarding
imported fill material and to reject a source statement if it does not demonstrate that the fill
material meets City standards and/or the Department has reason to suspect that the fill
material could be contaminated. Such requests or rejections shall be made in writing to the
applicant.
1. Project Site Address:
2. Project Site King County Tax Assessor Account Number:
3. In which Aquifer Protection Area Zone is the project site located, 1 or 2?
4. Cubic yards of fill to be imported to project site:
5. Project applicant name:
6. Fill source site address:
7. Fill source site King County Tax Assessor Account Number:
Table 1: Results of Source Fill Characterization Sampling and Analysis1007 Stewart Construction SiteNWTPH‐G (mg/kg)Sample # GasolineDiesel Heavy OilVolatile Organic Compounds (ug/kg) cPAHs (ug/kg) Arsenic Chromium LeadTP‐1‐10‐‐ ‐‐ ‐‐ ‐‐ ‐‐1 U 2.5 2.4TP‐2‐10‐‐ ‐‐ ‐‐ ‐‐ND 1 U2 U 2TP‐3‐10‐‐ ‐‐ ‐‐ ‐‐ ‐‐1 U 2 2.7TP‐4‐10‐‐ ‐‐ ‐‐ ‐‐ND 1 U 2.2 2.8TP‐5‐10‐‐ ‐‐ ‐‐ ‐‐ ‐‐1 U2 U 1.7S‐N3 7 U27 U67 UND‐‐ ‐‐ ‐‐ ‐‐S‐N13 5 U21 U53 UND‐‐ ‐‐ ‐‐ ‐‐S‐N10 6 U23 U57 UND‐‐4.99 48 10.2S‐N4 5 U19 U 51.1 UND‐‐ ‐‐ ‐‐ ‐‐SP‐1a‐NE 5 U26 U64 UND‐‐ ‐‐ ‐‐ ‐‐SP‐1b‐NE 5 U27 U66 UND‐‐ ‐‐ ‐‐ ‐‐Note: Soil samples collected from 1007 Stewart Construction Site on January 8, 2015 U ‐ not detected at concentration limit specified ND ‐ not detectedNWTPH‐Dx (mg/kg) Metals (mg/kg)
H/PW/CED/Data/Forms-Templates/Self Help Handouts/Pubic Works/Fill Source Statement.doc 09/11
Renton Municipal Code 4-4-060
Grading, Excavation, and Mining Regulations
L. FILLS:
1. Applicability and Exemptions: Unless otherwise recommended in the approved soil
engineering report, fills shall conform to the provisions of this Section. In the absence
of an approved soil engineering report, these provisions may be waived for minor fills
not intended to support structures. For minor fills or waste areas, humps, hollows or
water pockets shall be graded smooth with acceptable slopes.
2. Fill Location: Fill slopes shall not be constructed:
a. On natural slopes steeper than two-and-one-half horizontal to one vertical (2.5:1)
that are fifteen feet (15') or greater in height (except in conjunction with a
modification granted per RMC 4-9-250D1 for filling against the toe of a natural
rock wall - see RMC 43-060N2a(ii)(2)); or
b. Where the fill slopes toes out within twelve feet (12') horizontally of the top of
existing or planned cut slopes that are fifteen feet (15') or greater in height and
steeper than two-and-one-half horizontal to one vertical (2.5:1).
(Amd. Ord. 4835, 3-27-2000; Ord. 4851, 8-7-2000)
3. Preparation of Ground: The ground surface shall be prepared to receive fill by
removing vegetation, noncomplying fill, topsoil and other unsuitable materials as
determined by the soil engineer, and where the slopes are five to one (5:1) or
steeper, by benching into sound bedrock or other competent material.
4. Fill Material: Fill materials shall have no more than minor amounts of organic
substances and shall have no rock or similar irreducible material with a maximum
dimension greater than eight inches (8"). Fill material shall meet the following
requirements:
a. Construction, Demolition, and Land Clearing Waste Prohibited: Fill material shall
be free of construction, demolition, and land clearing waste except that this
requirement does not preclude the use of recycled concrete rubble per
Washington State Department of Transportation Standard Specifications for
Road, Bridge, and Municipal Construction.
b. Cleanliness of Fill Material: Fill material shall not contain concentrations of
contaminants that exceed cleanup standards for soil specified in WAC 173-340-
740, Model Toxics Control Act, regardless of whether all or part of the
contamination is due to natural background levels at the fill source site. For
project sites located in Zone 1 of the Aquifer Protection Area, fill material shall
not contain detectable concentrations of petroleum per the definition of Class 1
Soils contained in Table V in "Guidance for Remediation of Petroleum
Contaminated Soils" published by the Department of Ecology. Where the
detection limit (lower limit at which a chemical can be detected by a specified
laboratory procedure) for a particular soil contaminant exceeds the cleanup
standard for soil specified in WAC 173-340-740, then the detection limit shall be
the standard for fill material quality. Detection limits shall be a published by the
Department of Ecology in the current version of "TABLE II: SOIL, Method
Detection Limits, Practical Quantitation Limits, and Comparison of Method B
Values" or other source of information accepted by the Department if the Ecology
publication does not address the contaminant.
H/PW/CED/Data/Forms-Templates/Self Help Handouts/Pubic Works/Fill Source Statement.doc 09/11
c. Special Requirement for Projects Located in Zone 1 of the Aquifer Protection
Area and Which Will Involve Placement of More than Fifty (50) Cubic Yards of
Imported Fill: A source statement certified by a professional engineer licensed in
the State of Washington shall be provided to the Department and shall be
reviewed and accepted by the Department prior to stockpiling or grading
imported fill at the project site. The source statement, as defined in RMC 4-8-
120D19, shall be required for each source location from which imported fill will be
obtained. (Amd. Ord. 4851, 8-7-2000)
d. Special Requirement for Projects Located in Zone 2 of the Aquifer Protection
Area and Which Will Involve Placement of more than One Hundred (100) Cubic
Yards of Imported Fill: The source statement described in RMC 4-8-120D19 is
required for each source location from which imported fill will be obtained. (Amd.
Ord. 4851, 8-7-2000)
e. Abbreviated Source Statement for Aquifer Protection Area: The Department may
accept a source statement, as defined in RMC 4-8-120D19, that does not include
results of sampling and analysis of imported fill if it determines that adequate
information is provided indicating that the source location is free of
contamination. In addition to the information otherwise required by subsection as
defined in RMC 4-8-120D19, such information may include, but is not limited to:
i. Results of field testing of earth materials to be imported to the site with
instruments capable of detecting the presence of contaminants; and
ii. Results of previous sampling and analysis of earth materials to be imported
to the site. (Amd. Ord. 4851, 8-7-2000)
f. Source Statement Not Required for Imported Fill Obtained from Washington
State Department of Transportation Approved Source: The source statement
defined in RMC 4-8-120D19 is not required for those projects located in the
aquifer protection area if contractual documents confirm that imported fill will be
obtained from a Washington State Department of Transportation approved
source. (Amd. Ord. 4851, 8-7-2000)
g. Sampling and Analysis Procedures: The professional engineer or person under
the professional engineer's supervision who samples earth materials to be used
as imported fill, oversees analysis, and prepares the source statement required
by subsections L4c and L4d of this Section shall follow procedures specified in
WAC 173-340-820 and 173-340-830 of the Model Toxics Control Act Cleanup
Regulation and "Guidance on Sampling and Data Analysis Methods" published
by the Department of Ecology for earth materials potentially contaminated with
hazardous materials other than petroleum. Procedures specified in "Guidance for
Remediation of Petroleum Contaminated Soils" published by the Department of
Ecology shall be followed for earth materials potentially contaminated with
petroleum.
h. Permittee Subject to Required Actions after Illegal Placement of Imported Fill. A
permittee who stockpiles or grades imported fill at the site without Department
review and acceptance of the source statement required by subsections L4c and
L4d of this Section or who stockpiles or grades fill at the site that does not meet
the fill quality requirements of subsections L4a and L4b of this Section is subject
to measures specified by the Department to reduce risk of contamination of the
site due to illegal placement of fill. Such measures may include, but are not
limited to, any or all of the following and shall be implemented at the permittee's
expense:
H/PW/CED/Data/Forms-Templates/Self Help Handouts/Pubic Works/Fill Source Statement.doc 09/11
1. Provide the Department with a source statement meeting the requirements of
subsection L4c of this Section within a time-period specified by the
Department;
2. Immediately cover fill with a waterproof cover;
3. Immediately remove fill;
4. Installation of monitoring wells and monitoring of ground water quality;
5. Remediation of contamination of the site caused by the illegal placement of
fill according to a schedule specified by the Department and in accordance
with cleanup standards for soil and groundwater described in the Model
Toxics Control Act Cleanup Regulation, Chapter 173-340.
i. Department Authority to Conduct Independent Sampling and Analysis: The
Department shall have the authority to enter on to private property to conduct
independent sampling and analysis of fill. If the Department determines that fill
does not meet fill quality standards of subsections L4a and L4b of this Section,
then it may require the permittee to accomplish any or all of the measures listed
in part h. of this subsection at his or her own expense.
j. Department Authority to Implement Removal and Remediation Measures: The
Department or its authorized agents shall have the authority to implement
measures listed in subsection L4h of this Section if the permittee fails to
accomplish such measures in a timely manner. The permittee shall be
responsible for any costs incurred by the Department or its authorized agents in
the conduct of such activities. (Amd. Ord. 4740, 7-19-1999)
5. Minimum Compaction: All fills shall be compacted to a minimum of ninety five
percent (95%) of maximum density as determined by American Public Works
Association (APWA) specifications. Field density shall be determined in accordance
with APWA standards.
6. Maximum Slope: The slope of fill surfaces shall be no steeper than is safe for the
intended use. Except in conjunction with a modification granted per RMC 4-9-250D1
for one of the circumstances listed in RMC 4-3-050N2a(ii) (Geologic Hazards -
Modifications), fill operations associated with a plat, short plat, subdivision or
dedication, or other permitted land development activity which would result in the
creation of permanent slopes forty percent (40%) or greater which are fifteen feet
(15') in height, i.e., protected slopes, shall not be approved. (Amd. Ord. 4835,3-27-
2000)
7. Drainage and Terracing: Drainage and terracing shall be provided and the area
above fill slopes and the surfaces of terraces shall be as required by subsection N of
this Section.
H/PW/CED/Data/Forms-Templates/Self Help Handouts/Pubic Works/Fill Source Statement.doc 09/11
Renton Municipal Code 4-8-120D
Definitions of terms used in submittal requirements for Building, Planning, and Public
Works permit applications
19. Definitions A
Source Statement, Fill Material, Aquifer Protection Area: A source statement providing the
following information:
a. The source location of imported fill;
b. Previous land uses of the source location;
c. Whether or not earth materials to be removed from the source location are native,
undisturbed soil;
d. Whether or not the source location appears on government lists of contaminated
sites including those developed pursuant to the State Model Toxics Control Act and
the Federal Comprehensive Environmental Response, Compensation, and Liability
Act;
e. Results of sampling and analysis pursuant to RMC 4-4-060L4g, Fill Material, Sample
and Analysis Procedures; and
f. Whether or not imported fill meets fill quality standards described in RMC 4-4-
060L4a, Fill Material, Construction, Demolition and Land Clearing Waste Prohibited,
and RMC 4-4-060L4b, Fill Material, Cleanliness of Fill Material. (Ord. 4851, 8-7-
2000)
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FILL SOURCE
STATEMENT
FOR PROJECTS IN THE AQUIFER
PROTECTION AREA (APA)
CITY OF RENTON
Development Services Division
1055 South Grady Way, Renton WA 98055
Phone: (425) 430-7200
A Fill Source Statement CERTIFIED BY A PROFESSIONAL ENGINEER OR GEOLOGIST
licensed in the State of Washington is required in the following circumstances:
1. More than 50 cubic yards of fill will be imported to a project site located in Zone 1
of the Aquifer Protection Area.
2. More than 100 cubic yards of fill will be imported to a project site located in Zone 2
of the Aquifer Protection Area.
Exception: A Fill Source Statement is not required if documentation is provided that the fill
to be imported comes from a Washington Department of Transportation approved source.
It is required that fill material be sampled AT THE FILL SOURCE SITE and analyzed by a
laboratory to rule out contamination. See 11 below. A fill source site may qualify for an
ABBREVIATED FILL SOURCE STATEMENT if the source site has never been filled,
developed, or subjected to use that could have introduced chemical contamination to the
site. The abbreviated format does not require sampling and analysis of fill to detect
contamination and, therefore, reduces applicant costs. Please use attached form entitled
“Abbreviated Fill Source Statement”.
A SEPARATE SOURCE STATEMENT IS REQUIRED FOR EACH FILL SOURCE SITE.
A copy of the Renton Municipal Code section requiring the Fill Source Statement is attached
for your information. (RMC 4-4-060L4).
CONTACT THE DEVELOPMENT SERVICES DIVISION TO DETERMINE IF YOUR
PROJECT SITE IS LOCATED IN THE APA.
NOTE: The Department has the authority to request additional information regarding
imported fill material and to reject a source statement if it does not demonstrate that the fill
material meets City standards and/or the Department has reason to suspect that the fill
material could be contaminated. Such requests or rejections shall be made in writing to the
applicant.
1. Project Site Address:
2. Project Site King County Tax Assessor Account Number:
3. In which Aquifer Protection Area Zone is the project site located, 1 or 2?
4. Cubic yards of fill to be imported to project site:
5. Project applicant name:
6. Fill source site address:
7. Fill source site King County Tax Assessor Account Number:
Table 1: Results of Source Fill Characterization Sampling and AnalysisUrban Union Construction SiteSample #Diesel Heavy OilVolatile Organic Compounds (ug/kg) cPAHs (ug/kg) Arsenic Chromium Lead57 24.4 U61 U ND ND 2.26 37.5 2.3354 21.2 U 52.9 U‐‐ ‐‐2.33 33.4 2.1351 21.7 U 54.3 UND‐‐2.11 37.9 2.1258 20.6 U 51.6 U‐‐ ‐‐1.62 34.5 1.3255 20.7 U 51.8 UND‐‐1.62 27.1 1.5352 24.1 U 60.3 U‐‐ ‐‐2.39 27.5 2.0553 21.6 U 53.9 U ND ND 1.53 29 1.3956 20.8 U 52.1 U‐‐ND 1.8 24.4 1.8859 20.4 U 51.1 UND‐‐1.92 21.2 1.35Note: Soil samples collected from Urban Union Construction Site on January 14, 2015 U ‐ not detected at concentration limit specified ND ‐ not detectedNWTPH‐Dx (mg/kg) Metals (mg/kg)
H/PW/CED/Data/Forms-Templates/Self Help Handouts/Pubic Works/Fill Source Statement.doc 09/11
Renton Municipal Code 4-4-060
Grading, Excavation, and Mining Regulations
L. FILLS:
1. Applicability and Exemptions: Unless otherwise recommended in the approved soil
engineering report, fills shall conform to the provisions of this Section. In the absence
of an approved soil engineering report, these provisions may be waived for minor fills
not intended to support structures. For minor fills or waste areas, humps, hollows or
water pockets shall be graded smooth with acceptable slopes.
2. Fill Location: Fill slopes shall not be constructed:
a. On natural slopes steeper than two-and-one-half horizontal to one vertical (2.5:1)
that are fifteen feet (15') or greater in height (except in conjunction with a
modification granted per RMC 4-9-250D1 for filling against the toe of a natural
rock wall - see RMC 43-060N2a(ii)(2)); or
b. Where the fill slopes toes out within twelve feet (12') horizontally of the top of
existing or planned cut slopes that are fifteen feet (15') or greater in height and
steeper than two-and-one-half horizontal to one vertical (2.5:1).
(Amd. Ord. 4835, 3-27-2000; Ord. 4851, 8-7-2000)
3. Preparation of Ground: The ground surface shall be prepared to receive fill by
removing vegetation, noncomplying fill, topsoil and other unsuitable materials as
determined by the soil engineer, and where the slopes are five to one (5:1) or
steeper, by benching into sound bedrock or other competent material.
4. Fill Material: Fill materials shall have no more than minor amounts of organic
substances and shall have no rock or similar irreducible material with a maximum
dimension greater than eight inches (8"). Fill material shall meet the following
requirements:
a. Construction, Demolition, and Land Clearing Waste Prohibited: Fill material shall
be free of construction, demolition, and land clearing waste except that this
requirement does not preclude the use of recycled concrete rubble per
Washington State Department of Transportation Standard Specifications for
Road, Bridge, and Municipal Construction.
b. Cleanliness of Fill Material: Fill material shall not contain concentrations of
contaminants that exceed cleanup standards for soil specified in WAC 173-340-
740, Model Toxics Control Act, regardless of whether all or part of the
contamination is due to natural background levels at the fill source site. For
project sites located in Zone 1 of the Aquifer Protection Area, fill material shall
not contain detectable concentrations of petroleum per the definition of Class 1
Soils contained in Table V in "Guidance for Remediation of Petroleum
Contaminated Soils" published by the Department of Ecology. Where the
detection limit (lower limit at which a chemical can be detected by a specified
laboratory procedure) for a particular soil contaminant exceeds the cleanup
standard for soil specified in WAC 173-340-740, then the detection limit shall be
the standard for fill material quality. Detection limits shall be a published by the
Department of Ecology in the current version of "TABLE II: SOIL, Method
Detection Limits, Practical Quantitation Limits, and Comparison of Method B
Values" or other source of information accepted by the Department if the Ecology
publication does not address the contaminant.
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c. Special Requirement for Projects Located in Zone 1 of the Aquifer Protection
Area and Which Will Involve Placement of More than Fifty (50) Cubic Yards of
Imported Fill: A source statement certified by a professional engineer licensed in
the State of Washington shall be provided to the Department and shall be
reviewed and accepted by the Department prior to stockpiling or grading
imported fill at the project site. The source statement, as defined in RMC 4-8-
120D19, shall be required for each source location from which imported fill will be
obtained. (Amd. Ord. 4851, 8-7-2000)
d. Special Requirement for Projects Located in Zone 2 of the Aquifer Protection
Area and Which Will Involve Placement of more than One Hundred (100) Cubic
Yards of Imported Fill: The source statement described in RMC 4-8-120D19 is
required for each source location from which imported fill will be obtained. (Amd.
Ord. 4851, 8-7-2000)
e. Abbreviated Source Statement for Aquifer Protection Area: The Department may
accept a source statement, as defined in RMC 4-8-120D19, that does not include
results of sampling and analysis of imported fill if it determines that adequate
information is provided indicating that the source location is free of
contamination. In addition to the information otherwise required by subsection as
defined in RMC 4-8-120D19, such information may include, but is not limited to:
i. Results of field testing of earth materials to be imported to the site with
instruments capable of detecting the presence of contaminants; and
ii. Results of previous sampling and analysis of earth materials to be imported
to the site. (Amd. Ord. 4851, 8-7-2000)
f. Source Statement Not Required for Imported Fill Obtained from Washington
State Department of Transportation Approved Source: The source statement
defined in RMC 4-8-120D19 is not required for those projects located in the
aquifer protection area if contractual documents confirm that imported fill will be
obtained from a Washington State Department of Transportation approved
source. (Amd. Ord. 4851, 8-7-2000)
g. Sampling and Analysis Procedures: The professional engineer or person under
the professional engineer's supervision who samples earth materials to be used
as imported fill, oversees analysis, and prepares the source statement required
by subsections L4c and L4d of this Section shall follow procedures specified in
WAC 173-340-820 and 173-340-830 of the Model Toxics Control Act Cleanup
Regulation and "Guidance on Sampling and Data Analysis Methods" published
by the Department of Ecology for earth materials potentially contaminated with
hazardous materials other than petroleum. Procedures specified in "Guidance for
Remediation of Petroleum Contaminated Soils" published by the Department of
Ecology shall be followed for earth materials potentially contaminated with
petroleum.
h. Permittee Subject to Required Actions after Illegal Placement of Imported Fill. A
permittee who stockpiles or grades imported fill at the site without Department
review and acceptance of the source statement required by subsections L4c and
L4d of this Section or who stockpiles or grades fill at the site that does not meet
the fill quality requirements of subsections L4a and L4b of this Section is subject
to measures specified by the Department to reduce risk of contamination of the
site due to illegal placement of fill. Such measures may include, but are not
limited to, any or all of the following and shall be implemented at the permittee's
expense:
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1. Provide the Department with a source statement meeting the requirements of
subsection L4c of this Section within a time-period specified by the
Department;
2. Immediately cover fill with a waterproof cover;
3. Immediately remove fill;
4. Installation of monitoring wells and monitoring of ground water quality;
5. Remediation of contamination of the site caused by the illegal placement of
fill according to a schedule specified by the Department and in accordance
with cleanup standards for soil and groundwater described in the Model
Toxics Control Act Cleanup Regulation, Chapter 173-340.
i. Department Authority to Conduct Independent Sampling and Analysis: The
Department shall have the authority to enter on to private property to conduct
independent sampling and analysis of fill. If the Department determines that fill
does not meet fill quality standards of subsections L4a and L4b of this Section,
then it may require the permittee to accomplish any or all of the measures listed
in part h. of this subsection at his or her own expense.
j. Department Authority to Implement Removal and Remediation Measures: The
Department or its authorized agents shall have the authority to implement
measures listed in subsection L4h of this Section if the permittee fails to
accomplish such measures in a timely manner. The permittee shall be
responsible for any costs incurred by the Department or its authorized agents in
the conduct of such activities. (Amd. Ord. 4740, 7-19-1999)
5. Minimum Compaction: All fills shall be compacted to a minimum of ninety five
percent (95%) of maximum density as determined by American Public Works
Association (APWA) specifications. Field density shall be determined in accordance
with APWA standards.
6. Maximum Slope: The slope of fill surfaces shall be no steeper than is safe for the
intended use. Except in conjunction with a modification granted per RMC 4-9-250D1
for one of the circumstances listed in RMC 4-3-050N2a(ii) (Geologic Hazards -
Modifications), fill operations associated with a plat, short plat, subdivision or
dedication, or other permitted land development activity which would result in the
creation of permanent slopes forty percent (40%) or greater which are fifteen feet
(15') in height, i.e., protected slopes, shall not be approved. (Amd. Ord. 4835,3-27-
2000)
7. Drainage and Terracing: Drainage and terracing shall be provided and the area
above fill slopes and the surfaces of terraces shall be as required by subsection N of
this Section.
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Renton Municipal Code 4-8-120D
Definitions of terms used in submittal requirements for Building, Planning, and Public
Works permit applications
19. Definitions A
Source Statement, Fill Material, Aquifer Protection Area: A source statement providing the
following information:
a. The source location of imported fill;
b. Previous land uses of the source location;
c. Whether or not earth materials to be removed from the source location are native,
undisturbed soil;
d. Whether or not the source location appears on government lists of contaminated
sites including those developed pursuant to the State Model Toxics Control Act and
the Federal Comprehensive Environmental Response, Compensation, and Liability
Act;
e. Results of sampling and analysis pursuant to RMC 4-4-060L4g, Fill Material, Sample
and Analysis Procedures; and
f. Whether or not imported fill meets fill quality standards described in RMC 4-4-
060L4a, Fill Material, Construction, Demolition and Land Clearing Waste Prohibited,
and RMC 4-4-060L4b, Fill Material, Cleanliness of Fill Material. (Ord. 4851, 8-7-
2000)