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Site Assessment Report
Knight Bidder -Miami Herald Property
NSA Project No. 8015.4385.01
January 10, 2006
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SITE ASSESSMENT REPORT
Miami Herald
One Herald Plaza
Miami, FL 33132
Prepared for:
Knight Bidder
One Herald Plaza
Miami, FL 33132
Prepared by:
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HSA Engineers & Scientists
1486-A Skees Road
West Palm Beach, Florida 33411
HSA Project No. 8015.4385-01
. January 11, 2006
PROFESSIONAL ENGINEER CERTIFICATION
Site Assessment Report for:
Miami Herald
One Herald Plaza
Miami, FL 33132
In accordance with Chapter 471, Florida Statutes, and Chapter 62-780 Florida Administrative
Code, I hereby certify that to the best of my knowledge all engineering plans, specifications, and
calculations included herein are in accordance with standard and appropriate engineering
practices.
Terrence R. Horan, P.E.
Project Manager
Florida Registration #54815
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SAR
Knight Ridder - Miami Herald Property
TABLE OF CONTENTS
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Page
1 INTRODUCTION 1
2 BACKGROUND 1
3 ASSESSMENT AND REMEDIATION ACTIVITIES 2
3.1 DETERMINATION OF WATER TABLE DEPTH 2
3.2 FORMER FACILITIES INSPECTION 3
3.2.1 SOIL SAMPLING 3
3.2.2 LABORATORY RESULTS OF SOIL SAMPLES 3
3.2.3 GROUNDWATER SAMPLING 4
3.2.4 LABORATORY RESULTS OF GROUNDWATER SAMPLES 4
3.3 GROUNDWATER ASSESSMENT 4
3.3.1 GROUNDWATER SAMPLING 4
3.3.2 LABORATORY ANALYTICAL RESULTS 5
3.4 SOIL ASSESSMENT 5
3.4.1 ARSENIC 6
3.4.2 LABORATORY RESULTS OF ARSENIC EXCAVATIONS 7
3.4.3 POLYNUCLEAR AROMATIC HYDROCARBONS (PAHS) 7
3.4.4 LABORATORY RESULTS OF PAH EXCAVATIONS 8
3.4.4.1 EX-C 1 9
3.4.4.2 EX-A5 9
3.4.4.3 EX -Al, EX-A2, EX-A3, AND PARKING GARAGE VICINITY 9
3.4.5 SOIL SAMPLING FOR TRPH 10
3.4.6 LABORATORY ANALYTICAL RESULTS OF SOIL SAMPLING FOR TRPH 10
3.5 UNDERGROUND DEBRIS 10
3.6 WASTE DISPOSAL 11
4 CONCLUSIONS AND RECOMMENDATIONS 11
4.1 DETERMINATION OF WATER TABLE DEPTH 11
4.2 FORMER FACILITIES INSPECTION 11
4.3 GROUNDWATER ASSESSMENT 12
4.4 SOIL ASSESSMENT 13
4.4.1 ARSENIC 13
4.4.2 POLYNUCLEAR AROMATIC HYDROCARBONS (PAHS) 13
4.4.3 TOTAL RECOVERABLE PETROLEUM HYDROCARBONS (TRPH)13
4.5 UNDERGROUND DEBRIS 13
SAR
Knight Ridder - Miami Herald Property
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
Figure 10
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LIST OF FIGURES
Site Plan
Location of Underground Utilities
Location of Monitoring Wells
Tidal Survey on MW-A 1 at the Miami Herald
Sampling Locations for Former Facilities
Groundwater Analytical Results
Excavation and Sampling Results for Arsenic
Excavation and Sampling Results for PAH Near the Parking Garage
Excavation and Sampling Results for PAH North of the Parking Garage
Locations of Proposed Excavations
LIST OF TABLES
Table 1 Laboratory Results of Soil Samples for Historical RECs (Former Facilities)
Table 2 Laboratory Results for Groundwater Samples
Table 3 Laboratory Results of Soil Samples for Arsenic Source Removal
Table 4 Laboratory Results of Soil Samples for PAH Assessment and Source Removal
Table 5 Laboratory Results of Soil Samples for Carcinogenic PAH Assessment and
Source Removal
Table 6 Laboratory Results of TRPH Speciation
Appendix A
Appendix B
Appendix C
Appendix D
Appendix E
Appendix F
LIST OF APPENDICES
DERM Letter from September 13, 2005
Well Completion Reports
Historical Documents
Laboratory Analytical Reports
Groundwater Sampling Logs
Picture of Underground Concrete Slab
SAR
Knight Ridder - Miami Herald Property
1 INTRODUCTION
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This Site Assessment Report (SAR) presents the results of assessment and remediation activities
completed at the Knight Ridder — Miami Herald Property (Site) located between Biscayne
Boulevard and Biscayne Bay, and Northeast 13th Street and Northeast 15th Street in Miami,
Miami -Dade County, Florida as shown on Figure 1. A Work Plan (HSA, July 13, 2005) for the
assessment and remedial activities was prepared with the goal of a "no further action"
determination for residential use for the Site.
This work was performed to confirm and delineate the extent of soil and groundwater impact
reported in the Phase II Environmental Site Assessment (ESA), (EE&G April 2005), which was a
precursor of a proposed property transaction. Assessment and/or remedial activities were not
completed for the Miami Herald Building (see Figure 1) because it is not included in the
transaction. The Boulevard Shops (see Figure 1) is a historically designated building and
included in the sale, but will not be demolished during site development; assessment and/or
remedial activities were not completed for this area of the Site. The proposed development of the
Site, as contemplated by the Buyer, includes constructing residential and retail units on the out
parcels at the Site.
All sampling methods used by HSA Engineers & Scientists (HSA) on this project were in
accordance with the Standard Operating Procedures established by the Florida Department of
Environmental Protection. Both laboratories used, Jupiter Environmental Laboratory, Inc. and
US Biosystems, Inc. are certified by NELAC.
2 BACKGROUND
Knight Ridder, Inc. and a potential property purchaser agreed in a contract to the scope of work
for investigating the soil and groundwater at the Site. On behalf of the potential purchaser,
Greenberg Traurig, P.A. retained EE&G Environmental Services, LLC (EE&G) to perform an
ESA of the Site.
In January 2005, EE&G _ conducted a Phase I ESA and identified alleged Recognized
Environmental Conditions (RECs) associated with historical Site operations. In March through
April 2005, EE&G completed a Phase II ESA to assess the soil and groundwater quality for
contaminants of concern (COCs) typically associated with the RECs identified during the Phase I
ESA. During this time, EE&G also conducted a limited -scope geophysical survey to determine
the presence of subsurface anomalies, e.g. underground storage tanks (USTs). HSA observed the
field operations and split samples of soil and groundwater for laboratory analysis. The Phase II
Environmental Site Assessment (EE&G, April 2005) included the following recommendations:
1. Based on the presence of elevated concentrations of arsenic, lead, polynuclear aromatic
hydrocarbons (PAHs), and ammonia in groundwater samples collected across the Site, EE&G
recommended additional assessment to further characterize these impacts;
2. Due to the presence of arsenic, total recoverable petroleum hydrocarbon (TRPH), and
PAH constituents in soil samples above the soil cleanup target levels (SCTL) given in Chapter
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62-777, Florida Administrative Code (FAC) and Chapter 24 of the Code of Miami -Dade
County (Chapter 24), EE&G recommended a contingency be established to characterize,
handle, and dispose of all soils excavated or removed from the Site; and,
3. Due to the presence of scattered buried debris in limited areas on the southern edge of the
Site, EE&G recommended that a geotechnical engineer evaluate the need to excavate these
areas to minimize the potential for future settling.
HSA submitted a Work Plan to the Miami -Dade County Department of Environmental
Resources Management (DERM) for the assessment and remediation of the Site. DERM offered
comments on the proposed sampling plan included in the Work Plan in a letter dated September
13, 2005. A copy of the DERM letter is included in Appendix A.
3 ASSESSMENT AND REMEDIATION ACTIVITIES
3.1 DETERMINATION OF WATER TABLE DEPTH
The Work Plan included researching the depth -to -groundwater (DTW) at the Site to determine
the extent of the unsaturated zone. The Phase II ESA reported soil contaminant concentrations
exceeding the respective SCTLs in soil samples collected from 0 to 2 feet, 2 to 4 feet, and 4 to 6
feet below land surface (bls). This task was completed by measuring the DTW in permanent
monitor wells constructed at the Site and completing a tidal -survey of the water table elevation in
one of the wells.
Prior to beginning the underground investigation, ground -penetrating radar and electromagnetic
induction were performed and Sunshine State One Call of Florida was notified to locate
underground utilities. The locations of the underground utilities are depicted in Figure 2.
From November 7 through November 11, 2005, 12 monitor wells (MW-A1, A2, A3, A4, B1, B2,
B3, B4, Cl, C2, D1, and D2) were constructed at the locations shown on Figure 3. These
permanent monitor wells were installed to confirm the potential impacts documented by the
direct push sample results (EE&G April 2005). The wells were constructed of two-inch
diameter, schedule 40 PVC with screen (0.010-inch slot size) from two to twelve feet bls. The
wells were installed using a truck -mounted drill rig with 8.5-inch diameter hollow -stem augers.
The wells were completed by pouring sand (20/30) in the annulus beside the screen and a fine
sand seal was poured in the annulus above the screen to one foot above the screen. Grout was
poured from one foot above the screen to the surface. Each well was finished with a concrete
pad flush with grade, locking well cap, and steel manhole. The wells were developed by
pumping approximately 100 gallons of groundwater from each well. The development water
was containerized in 55-gallon drums, pending characterization and off -Site disposal. Copies of
the Well Completion Reports are included in Appendix B.
From November 22 through November 25, 2005, HSA used a pressure transducer and datalogger
installed in monitor well MW-A1 (see Figure 3), which is located approximately 475 feet west
of Biscayne Bay, and the DTW was recorded at twenty minute intervals. As shown on Figure 4,
the DTW ranged from 3.47 to 3.72 feet below the top -of -casing. Therefore, an unsaturated zone
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thickness of approximately four feet (0 — 4 foot interval) was used during the subsequent
assessment and remediation activities.
3.2 FORMER FACILITIES INSPECTION
DERM requested a scaled site diagram depicting the locations of the former facilities (Morgan
Chemical, Nash Body Shop, Rubin's Auto Body Shop, Fincher Motors, and a boat repair
facility) described in the Phase II ESA (see Appendix A). HSA reviewed available historical
documents (aerial photographs, Sanborn fire insurance maps, etc.) to determine the approximate
location of the former facilities. City Directories, Sanborn Fire Insurance maps from 1918, 1921,
1939, 1950, and 1987, and aerial photographs from 1945, 1963, and 2003 were used to conclude
that the former facilities listed in the DERM letter were located in the areas depicted in Figure 5.
Figure 5 shows the locations of the samples collected during the Phase II to assess potential
impact to the Site soil and groundwater from the former facilities. Based upon this information,
additional sampling was required to assess the soil and groundwater quality in the vicinity of the
former facilities. The locations of potential source areas (i.e. USTs, pipelines, soakage pits, etc.)
were not evident from review of the historical documents. Therefore, three soil samples and one
groundwater sample were collected in the approximate footprint of the former facilities. Copies
of the historical documents are included in Appendix C.
3.2.1 SOIL SAMPLING
On November 1 and 2, 2005 soil samples were collected in the vicinity of the former facilities
using a direct push drill rig (see Figure 5).
• Morgan Chemical Facility — Three soil samples (SBREC-10, SBREC-11, and SBREC-
17) were collected from the 0 — 2 foot and 2 — 4 foot intervals and analyzed for
chlorinated pesticides, polychlorinated biphenyls (PCBs), and the 8-RCRA Metals
(arsenic, barium, cadmium, chromium, lead, mercury, selenium, and silver);
• Nash Body Shop - Three soil samples (SBREC-1, SBREC-2, and SBREC-18) were
collected from the 2 - 4 foot interval and analyzed for 8-RCRA Metals;
• Rubin's Auto Body Shop - Three soil samples (SBREC-7, SBREC-8, and SBREC-19)
were collected from the 0 — 2 foot interval and analyzed for 8-RCRA Metals;
• Fincher Motor facilities - Three soil samples (SBREC-4, SBREC-5, and SBREC-16)
were collected from the 2 — 4 foot interval and analyzed for 8-RCRA Metals; and,
• Boat Repair facility - Three soil samples (SBREC-13, EXA1-N1, and SBREC-15) were
collected from the 0 — 2 foot interval and analyzed for volatile organic compounds
(VOCs) and 8-RCRA Metals.
3.2.2 LABORATORY RESULTS OF SOIL SAMPLES
The laboratory analytical results are summarized in Table 1.
• Morgan Chemical Facility — Dieldrin was reported in sample SBREC-17 (2 — 4 foot
interval) at a concentration of 2.6 µg/kg, exceeding the DERM Chapter 24 Leachability
Based on Groundwater SCTL of 2 µg/kg.
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• Nash Body Shop - Barium was reported in sample SBREC-2 at a concentration of 1 SU
mg/kg, exceeding the DERM Chapter 24 residential SCTL for direct exposure (120
mg/kg).
• Boat Repair facility - Barium was reported in sample SBREC-13 at a concentration of
160 mg/kg, exceeding the DERM Chapter 24 residential SCTL for direct exposure (120
mg/kg).
The remaining analytes were reported at concentrations below the method detection limit or
below the SCTLs. Copies of the sample chain of custody and laboratory analytical reports are
included in Appendix D.
3.2.3 GROUNDWATER SAMPLING
On November 1 and 2, 2005 groundwater samples were collected from 4 — 8 feet bls in the
vicinity of the former facilities using a direct push drill rig (see Figure 5).
• Morgan Chemical Facility — Groundwater sample SBREC-17 was collected and analyzed
for 8-RCRA Metals, Pesticides, and PCBs;
• Rubin's Auto Body Shop — Groundwater sample SBREC-19 was collected and analyzed
for 8-RCRA Metals;
• Fincher Motor facilities - Groundwater sample SBREC-16 was collected and analyzed
for 8-RCRA Metals;
• Nash Body Shop — Groundwater sample SBREC-18 was collected and analyzed for 8-
RCRA Metals; and,
• Boat Repair facility — Groundwater sample SBREC-15 was collected and analyzed for
VOCs and 8-RCRA Metals.
Copies of the Groundwater Sampling Logs are provided in Appendix E.
3.2.4 LABORATORY RESULTS OF GROUNDWATER SAMPLES
The laboratory analytical results are summarized in Table 2. All analytes were reported at
concentrations below the method detection limit or below the groundwater cleanup target levels
(GCTLs). Copies of the sample chain of custody and laboratory analytical reports are included
in Appendix D.
3.3 GROUNDWATER ASSESSMENT
3.3.1 GROUNDWATER SAMPLING
During the Phase II ESA, EE&G collected and analyzed groundwater samples from 41 direct -
push locations. The groundwater samples were analyzed for VOCs, semi -volatile organic
compounds (SVOC), 8-RCRA metals, polynuclear aromatic hydrocarbons (PAH), total
recoverable petroleum hydrocarbons (TRPH), total arsenic, lead, mineral spirits, and ammonia.
As mentioned above (Section 3.1), from November 7 through November 11, 2005, 12
monitoring wells (MW-A1, A2, A3, A4, B1, B2, B3, B4, C1, C2, D1, and D2) were constructed
at the locations depicted in Figure 3. From November 8 through November 12, 2005,
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groundwater samples were collected from the newly installed monitoring wells and analyzed tor
the parameters previously reported above the respective GCTLs to confirm the direct -push
sampling results.
Groundwater samples were collected from the monitor wells and analyzed for the parameters
listed below:
• Ammonia — monitor well MW-B4;
• Arsenic — monitor wells MW-AI, A3, B 1, B3, D1, and D2;
• Lead — monitor wells MW-A3, A4, B2, B4, and C1; and,
• PAHs — monitor wells MW-A2, B 1, B4, CI, and C2.
The laboratory analytical results for soil samples collected from EX-A1, EX-A2, and EX-A3
(see Section 3.4.4) reported concentrations of PAHs in the samples collected from the base of
the excavation that exceeded the SCTLs. Therefore, on December 7, 2005, groundwater samples
were collected from the center of these excavation areas using a direct push drill rig (4 — 8 foot
interval) and analyzed for PAHs to assess the groundwater quality in these areas.
Copies of the Groundwater Sampling Logs are provided in Appendix E.
3.3.2 LABORATORY ANALYTICAL RESULTS
The laboratory analytical results are summarized in Table 2. The groundwater monitor wells
and analytical results are shown on Figure 6.
• Arsenic — Arsenic was reported at a concentration of 0.011 mg/L in the sample collected
from MW-B 1 and at a concentration of 0.017 mg/L in the sample collected from MW-
D2, exceeding the GCTL of 0.01 mg/L.
• PAHs — Benzo(k)fluoranthene (0.054 µg/L) was reported in a sample collected from
MW-CI at a concentration exceeding the DERM Chapter 24 GCTL of 0.05 µg/L.
The remaining analytes were reported at concentrations below the method detection limit or
below the GCTLs.
Because the concentrations listed above were reported at concentrations that marginally
exceeded the respective GCTL, on December 8, 2005, groundwater samples were collected from
MW-B1, MW-D2, and MW-CI and analyzed for arsenic (MW-B1 and MW-D2) and PAHs
(MW-C1). Arsenic and benzo(k)fluoranthene in samples collected on December 8, 2005 were
reported at concentrations less than the respective GCTL. Laboratory analytical results for the
groundwater samples collected from excavations EX -Al, EX-A2, and EX-A3 were reported at a
concentrations for PAH constituents below the GCTLs. Copies of the sample chain of custody
and laboratory analytical reports are included in Appendix D.
3A SOIL ASSESSMENT
During the Phase II ESA (EE&G, April 2005), 44 soil borings were advanced across the Site
using direct -push drilling technology. The soil samples were collected from surface grade to
approximately eight feet bls, using a Macro Core sampler. The samples were collected in four -
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foot acetate liners and segregated into two -foot intervals for field analysis. The samples were
visually inspected and screened using an organic vapor analyzer, equipped with a flame
ionization detector (OVA/FID). Laboratory analytical results were reported at concentrations
exceeding the applicable SCTLs for the following parameters:
• Arsenic - 26 soil samples were reported with arsenic concentrations exceeding the direct
exposure residential SCTL of 2.1 mg/kg;
• PAHs - five soil samples were reported with benzo(a)pyrene concentrations exceeding
the direct exposure residential SCTL of 0.1 mg/kg, including one sample that contained
a "heavy petroleum -like interference, which resulted in a dilution that increased the
detection limits to above the SCTLs"; and,
• TRPH - one soil sample, SB-42 collected from 4 to 6 feet bls, was reported at a
concentration of 2,100 mg/kg, exceeding the groundwater based on leachability SCTL of
340 mg/ kg.
Concentrations of the 8-RCRA Metals, VOCs, organochlorine pesticides, and PCBs were
reported at concentrations either below the laboratory detection limit or reported below the
applicable SCTL. The Work Plan (HSA, July 13, 2005) proposed collecting additional soil
samples to assess the extent of the arsenic, equivalent benzo(a)pyrene concentration, and TRPH
impact in the areas where concentrations were reported above the applicable SCTL. There was
no additional sampling proposed to assess for 8-RCRA Metals, VOCs, organochlorine
pesticides, and PCBs.
The proposed approach in the Work Plan was to divide the areas of the Site with reported soil
concentrations exceeding the SCTLs into y4 acre parcels and then collect additional soil samples
from these areas. The Site was to be divided into (15) one -quarter acre exposure units, with
boundaries extending around the potentially impacted areas identified during the Phase II ESA,
and additional samples were proposed to be collected from each Unit until a total of 10 samples
were collected, from both the 0-2 and 2-4 foot zone for each quarter acre parcel. The FLUCL
calculator was proposed to be used, with a 95% upper confidence limit (UCL), to calculate the
average soil arsenic concentration. Interim Source Removal activities were proposed for the
soils which exceeded three times the applicable direct exposure SCTL, including excavation and
off -site disposal. However, as discussed below, the Work Plan was revised after HSA received
the DERM response letter.
3.4.1 ARSENIC
In the Work Plan response letter (see Appendix A), DERM indicated that, with the exception of
the results from soil borings SB-1 (arsenic concentration of 13.5 mg/kg) and SB-19 (arsenic
concentration of 11.0 mg/kg) from two to four bls, the arsenic concentrations in on -Site soil
appears to indicate sub -regional background influences. The arsenic concentrations from soil
borings SB-1 and SB-19 (2 — 4 foot intervals) represent population outliers and, therefore, must
be removed. The maximum arsenic concentrations considered as sub -regional background was
7.6 mg/kg.
On November 2, 2005, soil in the vicinity of SB-1 (excavation area "EXA-4") and SB-19
(excavation area "EXB-1 ") was excavated and stockpiled on Site pending off -Site disposal. The
excavations had final dimensions of approximately five feet by five feet, and extended to the
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water table at approximately four feet bls. Confirmatory soil s samplew— ere collected from the
base and sidewalls (0 - 2 foot and 2 - 4 foot intervals) of each excavation. The excavation areas
were backfilled with imported fill material. The approximate extent of the excavation areas and
the locations of the confirmatory samples are shown on Figure 7.
3.4.2 LABORATORY RESULTS OF ARSENIC EXCAVATIONS
The laboratory analytical results for the arsenic confirmatory samples are summarized in Table
3. The arsenic concentration reported from the confirmatory soil samples ranged from 0.90 — 4.2
mg/kg; consistent with the site -wide arsenic distribution. Copies of the sample chain of custody
and laboratory analytical reports are included in Appendix D.
3.4.3 POLYNUCLEAR AROMATIC HYDROCARBONS (PAHS)
In the Work Plan response letter (see Appendix A), DERM did not object to the source removal
of PAH impacted soils in the vicinity of soil borings:
• SB-2 (benzo(a)pyrene concentration of 0.39 mg/kg, 0 — 2 foot interval);
• SB-3 (benzo(a)pyrene concentration of 0.37 mg/kg, 0 — 2 foot interval);
• SB-6 (benzo(a)pyrene concentration of 0.52 mg/kg, 0 — 2 foot interval);
• SB-14 (benzo(a)pyrene concentration "interference", 2 — 4 foot interval mg/kg); and,
• SB-26 (benzo(a)pyrene concentration of 0.53 mg/kg, 0 — 2 foot interval).
On November 2, 2005, soil in the vicinity of SB-2 (excavation area "EX-A3"), SB-3 (excavation
area "EX-A2"), SB-6 (excavation area "EX -A 1"), SB-14 (excavation area "EX-A5"), and SB-26
(excavation area "EX-C 1 ") was excavated and stockpiled on Site pending off -Site disposal (see
Figure 8 and Figure 9).
All excavations had dimensions of five feet by five feet and were two feet deep. Excavation EX-
A5 was completed to a depth of approximately four feet bls. Confirmatory soil samples were
collected from the base and sidewalls of each excavation for analysis of PAH parameters.
Laboratory analytical results indicated that additional excavation was necessary due to the
equivalent benzo(a)pyrene concentrations reported above the residential direct exposure SCTL.
• Excavation EX -A 1 (see Figure 8) was expanded further east, south, west, and to the
water table (four feet bls);
• Excavations EX-A2 (see Figure 8) and EX-A5 (see Figure 9) were expanded further
north, east, south, west, and to the water table (four feet bls); and,
• Excavation EX-C 1 (see Figure 9) was expanded further north, south, and west.
Additional confirmatory samples were collected from the base and sidewalls of the excavations.
Laboratory analytical results reported equivalent benzo(a)pyrene concentrations above the
residential direct exposure SCTL in most of the samples. Since the majority of the samples
collected south of the parking garage were reported with equivalent benzo[a]pyrene
concentrations above the residential direct exposure SCTL, further excavation was discontinued
and additional assessment was completed to delineate the extent of soil impact. Soil samples
were collected from the 0 — 2 foot interval and 2 — 4 foot interval in a 20-feet (east/west) by 10-
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feet (north/south) grid, starting from the southwest comer of the parking garage. The first
sample was collected approximately five feet south and twenty feet east of the southwest comer
of the parking garage, and was labeled "PG-5-20"; the second sample was fifteen feet south and
twenty east of the southwest corner of the parking garage and labeled "PG-15-20", etc. The
sampling was continued eastward to the vicinity of the high -voltage transformer immediately
east of EX -Al (see Figure 8). Additionally, four soil samples were collected in a grid west of
the southwest corner of the parking garage.
To delineate the extent of the PAH impact near the parking garage, soil samples were collected
in a grid from beneath the parking garage. Soil samples were collected from two rows of
fourteen with approximately twenty feet between each sample from east to west, as shown in
Figure 8. The samples were labeled by column first (A through N) and then by row (1 and 2),
e.g. IPG-N2 (inside parking garage, column N, row 2). Samples do not exist for IPG-H2 through
IPG-L2 due to the ramp to the parking garage's second level.
On December 1, 2005, a direct push drill rig was used to collect soil samples to the north and
west of EX-A5 and to the north of EX-C1, to delineate the PAH impact in the vicinity of these
excavation areas (see Figure 9).
3.4.4 LABORATORY RESULTS OF PAH EXCAVATIONS
The laboratory analytical results for the PAH confirmatory and assessment soil samples are
summarized in Table 4 and Table 5, and are shown on Figure 8 and Figure 9. Table 5
summarizes the analytical data from the carcinogenic PAHs. As in the case of dioxins and
furans, carcinogenic PAHs are found as mixtures in contaminated media. Given that
carcinogenic PAHs have a common toxicity mechanism, but display difference toxic potencies,
the TEF approach can be used to convert individual PAH site concentrations into a single
concentration of the index chemical, benzo(a)pyrene. This approach should be followed to
evaluate risks from direct exposure. Consequently, direct exposure SCTLs were derived only for
benzo(a)pyrene. The table below presents the TEFs used to calculate site concentrations before
comparison with the direct toxicity SCTLs for benzo(a)pyrene.
Toxic Equivalency Factors for Carcinogenic PAHs
Contaminant
TEF
benzo(a)pyrene
1.0
benzo(a)anthracene
0.1
benzo(b)fluoranthene
0.1
benzo(k)fluoranthene
0.01
Chrysene
0.001
dibenz(a,h)anthracene
1.0
indeno(1,2,3-cd)pyrene
0.1
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Table 5 presents the reported PAH concentrations, the TEFs, and the equivalent benzo(a)pyrene
concentrations. Copies of the sample chain of custody and laboratory analytical reports are
included in Appendix D.
3.4.4.1 EX-C1
Excavation EX-C 1 was initiated in the location of SB-26 from the Phase II ESA. Laboratory
analytical results indicate that soil samples for which the equivalent benzo(a)pyrene
concentrations were reported less than the residential direct -exposure SCTL ("clean"
confirmatory samples), were collected approximately 2.5 feet east, 7.5 feet south, 7.5 feet west,
and 2 feet deep from SB-26. Although the soil sample collected 12.5 feet north of SB-26 (0 - 2
interval) was reported with equivalent benzo(a)pyrene concentrations less than the residential
direct -exposure SCTL, the soil sample collected 17.5 feet north of SB-26 (at the Site perimeter, 0
— 2 foot interval) was reported at an equivalent benzo(a)pyrene concentration (0.68 mg/kg)
greater than the residential direct -exposure SCTL.
3.4.4.2 EX-A5
Excavation EX-A5 was initiated in the location of SB-14 from the Phase II ESA. Laboratory
analytical results indicate that soil samples with equivalent benzo(a)pyrene concentrations
reported less than the residential direct -exposure SCTL were collected approximately 7.5 feet
east of SB-14 (0 — 2 foot and 2 — 4 foot interval), 7.5 feet south of SB-14 (0 — 2 foot and 2 — 4
foot interval), 7.5 north of SB-14 (0 — 2 foot and 2 — 4 foot interval), and 17 feet west of SB-14
(0 — 2 foot and 2 — 4 foot interval).
As shown on Figure 9, the soil samples collected from 7.5 feet north to 27.5 feet north of SB-14,
which is covered by asphalt, did not have any equivalent benzo(a)pyrene concentrations
exceeding the SCTL; the soil sample collected approximately 35 feet north of SB-14, which is
covered by grass, was reported at an equivalent benzo(a)pyrene concentration that exceeded the
SCTL (0.74 mg/kg). The soil between 7.5 and 17.5 feet west of SB-14 could not be sampled due
to underground utilities (storm drain). The soil from 17.5 feet west to 42.5 feet west of SB-14,
which is covered by asphalt, did not have any equivalent benzo(a)pyrene concentrations
exceeding the SCTL; the soil sample collected approximately 60 feet west of SB-14, which is
covered by grass, was reported at an equivalent benzo(a)pyrene concentration (0.61 mg/kg, 0 — 2
foot interval) exceeding the SCTL.
3.4.4.3 EX -Al, EX-A2, EX-A3, AND PARKING GARAGE VICINITY
Excavation EX -A 1 was initiated in the location of SB-6 from the Phase II ESA. In the 0 — 2 foot
interval, soil samples collected 7.5 feet east of SB-6, 7.5 feet south of SB 6, 7.5 feet north of SB-
6, and 7.5 feet west of SB-6 were reported at equivalent benzo(a)pyrene concentrations
exceeding the residential direct -exposure SCTL. Additionally, the soil sample collected from the
2 — 4 foot interval at SB-6 was reported at an equivalent benzo(a)pyrene concentration exceeding
the residential direct -exposure SCTL. In the 2 - 4 foot interval samples could not be collected
7.5 east, south, or west due to underground obstructions. The underground obstructions are
discussed further in Section 3.6.
Excavation EX-A2 was initiated in the location of SB-3 from the Phase II ESA. Laboratory
analytical results of sidewall samples reported equivalent benzo(a)pyrene concentrations in the
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soil samples collected 7.5 feet south of SB-3 (2 — 4 foot interval), 2.5 feet east of SB-3, 2.5 feet
west of SB-3, and 7.5 feet west of SB-3 exceeding the residential direct -exposure SCTL.
Excavation EX-A3 was initiated in the location of SB-2 from the Phase II ESA. Laboratory
analytical results of all four sidewall samples collected from the 0 — 2 foot interval were reported
at equivalent benzo(a)pyrene concentrations exceeding the residential direct -exposure SCTL.
Laboratory analytical results indicate that all samples immediately south of the garage (which are
covered by grass), except for the soil samples collected 25 feet south and 240 feet east of the
southwest corner of the parking garage (2 — 4 foot interval), were reported at equivalent
benzo(a)pyrene concentrations exceeding the residential direct -exposure SCTL.
Laboratory analytical results also indicate one of the seven soil samples collected southwest of
the parking garage (which are covered by asphalt), was reported at an equivalent benzo(a)pyrene
concentration exceeding the residential direct -exposure SCTL.
Equivalent benzo(a)pyrene concentrations were reported in soil samples IPG-EI (0 — 2 foot
interval), IPG-MI (2 — 4 foot interval), IPG-C2 (2 — 4 foot interval), IPG-D2 (0 — 2 foot interval),
and IPG-E2 (0 — 2 foot interval) exceeding the residential direct -exposure SCTL. The other 39
soil samples collected from beneath the parking garage were reported at equivalent
benzo(a)pyrene concentrations less than the residential direct -exposure SCTL.
3.4.5 SOIL SAMPLING FOR TRPH
During the Phase II ESA, 26 soil samples were analyzed for TRPH using the FL PRO Method.
TRPH in one soil sample (sample collected from soil boring SB-42) was reported at a
concentration of 2,100 mg/kg, exceeding the groundwater based on leachability SCTL of 340
mg/kg. Soil sample SBREC-13, which was used during the former facilities investigation, was
collected using the direct push method in the same location as SB-42 from the Phase II ESA (see
Figure 5). This soil sample was submitted for lab analysis using the TRPH Working Group
Method (WGM).
3.4.6 LABORATORY ANALYTICAL RESULTS OF SOIL SAMPLING FOR TRPH
The soil sample collected from SBREC-13 was analyzed in a laboratory for TRPH speciation
using the Working Group Method. As shown in Table 6, concentrations of each of the TRPH
speciation parameters were reported less than the laboratory reporting limit of 55 mg/kg, which
is less that than the SCTL for each aliphatic and aromatic species.
3.5 UNDERGROUND DEBRIS
The DERM response letter (see Appendix A) required further investigation of the potential for
buried solid waste debris along the southern boundary of the Site, as referenced in the Phase II
ESA. This investigation was completed, including observations made during the installation of
monitor wells and soil borings and during source removal activities.
The only underground objects encountered, which are not active utilities, include:
• An unused concrete conduit which was placed by Florida Power & Light and is oriented
north -south approximately 50 feet east of EX-A2; and,
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• A horizontal concrete slab located approximately two feet bls near EX -Al. The concrete
slab may be the foundation of a former building. A picture of the concrete slab is
included in Appendix F.
3.6 WASTE DISPOSAL
Soil excavated during the source removal was stockpiled at the site pending off -Site disposal.
Except for the drill cuttings from MW-C2, all drill cuttings from the monitoring well installation
were spread on site. The drill cuttings from MW-C2 exhibited a petroleum odor and were placed
with the stockpiled soil from the excavations.
The groundwater purged during the monitor wells during development was containerized in
drums pending laboratory analysis. The drums will be emptied and the groundwater poured onto
the Site, since the laboratory analysis reported concentrations of parameters below the GCTLs
for all monitor wells samples.
4 CONCLUSIONS AND RECOMMENDATIONS
This Site Assessment Report (SAR) presented the results of assessment and remediation
activities completed at the Knight Ridder — Miami Herald Property (Site) located between
Biscayne Boulevard and Biscayne Bay, and Northeast 13th Street and Northeast 15th Street in
Miami, Miami -Dade County, Florida as shown on Figure 1. The Work Plan for the assessment
and remedial activities was prepared with the goal of a "no further action" determination for
residential use for the Site. The scope of work was performed to confirm and delineate the
extent of soil and groundwater impact reported in the Phase II Environmental Site Assessment
(ESA), (EE&G April 2005), which was a precursor of a proposed property transaction.
4.1 DETERMINATION OF WATER TABLE DEPTH
A pressure transducer and datalogger were installed in monitoring well MW-A1 (see Figure 3),
which is located approximately 475 feet west of Biscayne Bay, and the depth to groundwater
(DTW) was recorded at twenty -minute intervals. As shown on Figure 4, the DTW ranged from
3.47 to 3.72 feet below the top -of -casing. We recommend using an unsaturated zone thickness
of approximately four feet when reviewing the results from the assessment and remediation
activities.
4.2 FORMER FACILITIES INSPECTION
HSA reviewed available historical documents (aerial photographs, Sanborn fire insurance maps,
etc.) to determine the approximate location of the former facilities (Morgan Chemical, Nash
Body Shop, Rubin's Auto Body Shop, Fincher Motors, and a boat repair facility) described in the
Phase II ESA. Figure 5 provides a scaled site diagram showing the locations of the samples
collected during the Phase II to assess potential impact to the Site soil and groundwater from the
former facilities. Additional sampling was completed to assess the soil and groundwater quality
Combined Report
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in the vicinity of the former facilities. Three soil samples and one groundwater sample were
collected in the approximate footprint of the former facilities and these samples were analyzed
for contaminants of concern associated with the former facilities.
Soil samples were reported with concentrations of dieldrin (Morgan Chemical Facility, SBREC-
17, 2.6 µg/kg) slightly exceeding the DERM Chapter 24 Leachability Based on Groundwater
SCTL (2 fig/kg), and barium (Nash Body Shop, SBREC-2, 180 mg/kg; and, the Boat Repair
facility, SBREC-13, 160 mg/kg) and the DERM Chapter 24 residential SCTL for direct exposure
(120 mg/kg). The laboratory analytical results of groundwater samples were reported at
concentrations below the method detection limit or below the groundwater cleanup target levels
(GCTLs).
Based on the concentrations of select soil samples being reported only slightly above the SCTL;
the concentration reported for dieldrin in SBREC-17 is less then the FDEP SCTL for residential
direct exposure (0.06 mg/kg); and, all groundwater samples being reported below the GCTLs, we
propose no further her action for the assessment and remediation related to the former facilities at the
Site.
4.3 GROUNDWATER ASSESSMENT
Twelve monitoring wells (MW-AI, A2, A3, A4, B1, B2, B3, B4, CI, C2, D1, and D2) were
constructed at the locations depicted in Figure 3. Groundwater samples were collected from the
monitoring wells and analyzed for the parameters previously reported above the respective
GCTLs to confirm the direct -push sampling results (ammonia, arsenic, lead, and PAHs).
The lab reported concentrations of arsenic (MW-B1 and MW-D2) and benzo(k)fluoranthene
(MW-C1) that marginally exceeded the respective GCTLs. The remaining analytes were
reported at concentrations below the method detection limit or below the GCTLs. Monitoring
wells MW-B1, MW-D2, and MW-C1, were subsequently resampled and analyzed for arsenic
(MW-B1 and MW-D2) and PAHs (MW-C1). Arsenic and benzo(k)fluoranthene in samples
collected during the second sampling event were reported at concentrations less than the
respective GCTL.
Due to equivalent benzo(a)pyrene concentrations reported for soil samples collected from the
base of excavation areas EX -Al, EX-A2, and EX-A3 (2 — 4 foot interval, immediately above the
water table interface) exceeding the SCTL, groundwater samples were collected using a direct
push drill rig (4 — 8 foot interval) and analyzed for PAHs to assess the groundwater quality in
these areas. Laboratory analytical results reported groundwater concentrations below the
GCTLs.
Due to the analysis of 9 of the 12 samples being reported at concentrations below the GCTLs
from the first sampling event; the results from the second sampling event reported at
concentrations below the GCTLs; and, that the additional groundwater investigation in the
vicinity of impacted soil showed no impact to groundwater, no further action is proposed for the
assessment and remediation of groundwater at the Site, and the permanent monitoring wells
located at the Site should be abandoned by filling with grout.
Combined Report
Knight Bidder - Miami Herald Property
12
4.4 SOIL ASSESSMENT
4.4.1 ARSENIC
Source removal was completed in the vicinity of the Phase II ESA soil borings SB-1 and SB-19
(2 — 4 foot interval). Because the confirmation samples collected from the excavation sidewalls
were reported at concentrations consistent with the site -wide arsenic distribution, no further
action is proposed for the assessment and remediation of arsenic impacted soil at the Site.
4.4.2 POLYNUCLEAR AROMATIC HYDROCARBONS (PARS)
There are approximately 2,500 cubic yards of soil in -place at the Site that laboratory analysis has
reported equivalent benzo(a)pyrene concentrations exceeding the SCTLs. These soils are
primarily located in the unpaved area (0 — 4 foot interval) located adjacent to the south side of
the parking garage. We propose removing the impacted soil located immediately south of the
south side of the parking garage to a distance approximately 10-feet north of the FPL
underground conduit (FPL mandated a minimum 10-foot setback from the utility line), running
east -west on the north side of Interstate I-395, and using the results from analysis of samples
collected beneath the parking garage as confirmatory data points. We also propose expanding
the excavations EX-A5 and EX-C1 further north and west, to the location of soil samples
collected with equivalent benzo(a)pyrene concentrations reported below the SCTLs. This source
removal plan does not included removing soil beneath the parking garage, since only five of the
46 samples collected were reported at equivalent benzo(a)pyrene concentrations exceeding the
SCTLs. Additionally, any impacted soil in the right-of-ways and FPL utility setback area will be
left in place. After the additional soil is excavated, we will propose no further action for the
assessment and remediation of PAH impacted soil at the Site. Figure 10 shows the extent of the
proposed excavation areas.
4.4.3 TOTAL RECOVERABLE PETROLEUM HYDROCARBONS (TRPH)
One of the 26 soil samples collected during the Phase II ESA, and analyzed for TRPH using the
FL PRO Method, was reported at a concentration exceeding the SCTL. A soil sample (SBREC-
13) was analyzed using the TRPH-WGM to confirm the results presented in the Phase II ESA.
Concentrations of each of the TRPH speciation parameters were reported less than the laboratory
detection limit of 55 mg/kg, which is less that than the SCTL for each aliphatic and aromatic
species. Due to all samples being reported at concentrations below the TRPH fraction -specific
SCTLs, no further action is proposed for the assessment and remediation of TRPH impacted soil
at the Site.
SUBMITTED INTO THE
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4.5 UNDERGROUND DEBRIS
Due to the extensive underground investigation completed during the assessment and
remediation activities, including observations made during the installation of monitor wells and
soil borings and during source removal activities, it is believed that other underground objects,
except utilities, are not present. Since no evidence of buried solid waste debris was revealed
during the assessment and remediation activities, no further action is proposed to investigate the
potential for buried solid waste debris at the Site.
Combined Report
Knight Ridder - Miami Herald Property
13
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TABLES
11, l l..J
01.
NEH
ENQINEERIS AND ao1EN'riaTS
A Member of the CRA Family of Companies
JBMIiTEy INTO THE
UBCOD FOR
R�<
'' FM wr�i ON II-o9-o4.
LETTER OF TRANSMITTAL
'..1 /
SAM Ms. Lisa Smith
Company:
Address:
gagall January 11, 2006
Me 8015-4385-01
Dade County Environmental
Resources Management
Pollution Control Division
33 SW 2" Avenue, 8`h Floor
Miami, FL 33130
11111.41
ritigar Mr. Terry Horan
kou?
Knight Ridder-M ami Herald
Property (HWR /File-22234)
13: located at, near, or in the vicinity of
1431-1451 North Bayshore Drive,
Miami, Miami -Dade County, Florida
We are sending you
the following items:
® Attached
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January 2006
801438501
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Jan. 5, 2006
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gastsatida Dear Ms. Smith:
Please find attached two (2) original Site Assessment Reports for the Knight Ridder Miami
Herald Property, plus one (1) check for $925.00 towards the review fee. Please contact us at
(561) 688-9008 with any questions or comments.
Thank You
lay
www.haa-env.com
Environmental & Geotechnical Engineering • Construction Materials Testing
1486-A Skees Road / West Palm Beach, FL 33411
Tel: (561) 688-9008 / Fax: (561) 688-9005
Offices in: Tampa / Orlando / Cape Canaveral / West Palm Beach / Hilton Head
=HSA
ENO1NEERs ANC. sCIENTISTs
AMember ofthe CR4 Family of -Companies
LETTER OF TRANSMITTAL
pipzivED
JAN 112006
POLLUT ONt CONTROL
DIVISION
10 Ms. Lisa Smith
lMMj . January 18, 2006
NIM: 8015-4385-01
Dade County Environmental
Company. Resources Management
Address: Pollution Control Division
33 SW 2'd Avenue, Stb Floor
Miami, FL 33130
Ms. Katrina Greco
Knight Ridder-Miami Herald
Property (HWR-62WFI1e-22234)
1H5' located at, near, or in the vicinity of
1431-1451 North Bayshore Drive,
Miami, Miami -Dade County, Florida
We are sending You ® Attached
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Oth
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Hale:
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Dear Ms. Smith:
Please find attached two (2) original signed and sealed Site Assessment Reports Professional
Engineer Certification for the Knight Ridder Miami Herald Property. Please contact us at
(561) 688-9008 with any questions or comments.
Thank You
Sea&'. .
EX8111111d8MBER
Environmental & Geotedmicai Engineering • Construction Materials Testing
1486-A Sienna Road, West Palm Beach, FL 33411 U B L I C R E CO R D FO R
Tel: (561)688-9008 / Fax: (561) 688-9005
Offices in: Tampa / Orhando / Cape Canaveral / West Paim Beach / Hilton Head 1T
M16+r1 ON )141.0`
:u6iv11TTED INTO THE
PROFESSIONAL ENGINEER CERTIFICATION
Site Assessment Report for:
Miami Herald
One Herald Plaza
Miami, FL 33132
In accordance with Chapter 471, Florida Statutes, and Chapter 62-780 Florida Administrative
Code, I hereby certify that to the best of my knowledge all engineering plans, specifications, and
calculations included herein are in accordance with standard and appropriate engineering
practices.
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SAR
Knight Ridden - Miami Herald Property
PROFESSIONAL ENGINEER CERTIFICATION
Site Assessment Report for:
Miami Herald
One Herald Plaza
Miami, FL 33132
In accordance with Chapter 471, Florida Statutes, and Chapter 62-780 Florida Administrative
Code, I hereby certify that to the best of my knowledge all engineering plans, specifications, and
calculations included herein are in accordance with standard and appropriate engineering
practices.
Project g w ' e.. r .., - .
• Florida I�►4tivn.#59�6ii
,AMITTED INTO THE
'UBLIC RECORD FOR
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SAR
Knight Ridder - Miami Herald Property