HomeMy WebLinkAboutCT 98-12; Magnolia Gardens; Tentative Map (CT) (56)RESULTS OF ENVIRONMENTAL OBSERVATION
' AND TESTING SERVICES DURING REMEDIAL EARTHWORK
MAGNOLIA GARDENS, CARLSBAD TRACT 98-12
CITY OF CARLSBAD, SAN DIEGO COUNTY, CALIFORNIA
"• FOR
[ PACIFIC SCENE HOMES
2505 CONGRESS STREET, SUITE 220
> SAN DIEGO, CALIFORNIA 92110
I -
W.O. E2484-3-SC AUGUST 6,2001"
Geotechnical • Geologic • Environmental
5741 Palmer Way • Carlsbad, California 92008 • (760)438-3155 • FAX (760) 931-0915
August 6, 2001
W.O. E2484-3-SC
Pacific Scene Homes
2505 Congress Street, Suite 220
San Diego, California 92110
Attention: Mr. Dennis Ferdig
Subject: Results of Environmental Observation and Testing Services During Remedial
Earthwork, Magnolia Gardens, Carlsbad Tract 98-12, City of Carlsbad,
San Diego County, California
Dear Mr. Ferdig:
D As requested by Mr. Thad Jones (field superintendent with Pacific Scene Homes),
GeoSoils, Inc. (GSI) is providing the following results of field observations and chemical
testing of verification sampling during remedial grading of surface soils containing
D pesticide residues on the subject property. The purpose of our observations during
remedial grading, conducted on August 2, 2001, was to observe removal of the upper
±one (1) foot of earth materials within an area of the project, where pesticide
0 (i.e., Toxaphene) residue concentrations were previously detected above human health-
based risk limits criteria (GSI, 1999b).
Scope of Work
Prior to the start of field work, onsite tailgate health and safety meetings were held on
July 17 and 24, 2001 by GSI. All employees of the grading contractor (North County
Asphalt, Inc.-Grading Division) working on the project site were in attendance, as well as
Pacific Scenes' project superintendent Mr. Thad Jones. A site specific Safety and Health
Plan (SHP), outlining the health and safety procedures to be used while performing the
environmental remediation services were discussed, including the potential chemical and
safety hazards and potential routes of exposure for each chemical hazard (GSI, 2001). For
review purposes, the SHP is provided herein as Appendix B.
GSI personnel observed the removal of the upper one (1) foot of earth materials over a
one (1) acre area onsite, where Toxaphene residue concentrations were previously
detected above human health-based risk limits criteria (GSI, 1999b). It was our
understanding that the grading contractor located the area of remediation in the field,
based on GSI (1996b). The area of remedial earthwork consisted of all or a portion of
Lots 8 and 9 and Brady Circle (east), Stations 10+05± to 12+70±. Soils removed from
this area were placed within an overexcavated portion of Brady Circle (south), Stations
13+70± to 15+90±. Limits of remedial earthwork are shown on Figure 1. Approximate
elevations of the top of remediated fill is presented on the enclosed map (Figure 1), which
utilized a portion of the 40-scale plans for the project by Crosby Meade Benton Associates
(December 12,2000) as a base map. Elevations were generated from the adjacent survey
control stakes. The remediated fill materials were placed at least five (5) feet below asphalt
grades in street areas.
At the conclusions of remedial earthwork, two (2) samples from the exposed earth
materials were collected from hand auger holes (i.e., VS-1 and VS-2). Sample locations
are shown on Figure 1. Samples were gathered and handled according to EPA standard
procedures and immediately sealed, labeled, placed in a chilled ice chest and delivered
to a California Department of Health Services (DHS) certified laboratory, accompanied by
a Chain-Of-Custody Record. As per regulatory requirements, all samples were taken under
the direct supervision of a California Registered Geologist.
CHEMICAL ANALYSES
Based upon the previous detected concentrations of agricultural chemical residues (GSI,
1999b), each soil sample was discretely tested for Chlorinated Pesticides utilizing EPA test
method 8081 A.
Chemical Test Results
Test results reported no concentration of pesticides residues were detected within the
samples above the laboratory detection limit. Chemical test results are presented in
Appendix C.
TABLE 1
SUMMARY OF CHEMICAL LABORATORY TEST RESULTS
Sample Location
VS-1
VS-2
TOXAPHENE
(M9/kg)
ND(1)
ND
PRELIMINARY REMEDIAL GOALS (PRGs)
(M9/kg) ''•'•••'•
400
400
Note: ND(1) - Not detected above the laboratory reporting limit
Pacific Scene Homes W.O. E2484-3-SC
Tract 98-12, Carlsbad August 6, 2001
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GeoSoils, Inc.
Limits of Removal
Elevation of Top of Buried
Verification Sample Location
'Limits o* Burial EX/Sf STRUCTURES
TO BE REMOVED
GRADE£ PERMISSION
/09/2000&R DATED
No Scale
AH locations are approximate.Map reproduced from, "Grading Plans for Magnolia Gardens," Sheet 3 of 5, dated 12-12-00, by Crosby Meade Benton & Associates
Remedial Earthwork Map
for Soils With Pesticide Residues
i/lagnolia Gardens Development Carlsbad, C/
Carlsbad Tract 98-12
DATE 8-2001
W.O. NO.E2484-3-SC
Geotechnical • Geologic • Environmental
Figure 1
CONCLUSIONS AND RECOMMENDATIONS
Based upon the scope of work completed, GSI presents the following conclusions and
recommendations:
• Residue concentrations of the previously detected pesticide Toxaphene were not
detected above the laboratory detection limit of 100 //g/kg onsite. In addition, there
were no residue concentrations detected of any of the parameters in the
organochlorine pesticide suite above the laboratory detection limits.
Based upon field observations conducted by this office during remedial grading of
one (1) area onsite, as well as chemical test results presented herein, soils with
previously reported concentrations of pesticide residues detected above or human
health-based risk limits criteria have been removed and buried within street areas.
Based upon elevations and limits of the fill placed as a result of the subject remedial
earthwork, surficial earth materials removed from the plot have been placed in areas
which will mitigate the potential for future long-term human contact and/or contact
with groundwater. Further studies or action are not proposed from an
environmental viewpoint.
LIMITATIONS
The materials encountered on the project site and utilized in our evaluation are believed
representative of the area; however, earth materials vary in character between excavations
and natural outcrops or conditions exposed during mass grading. Site conditions may
vary due to seasonal changes or other factors. GSI assumes no responsibility or liability
for work, testing or recommendations previously performed or provided by others.
Since our evaluation is based upon utilizing governmental references, site materials
observed and selective laboratory testing, the conclusion and recommendations are
professional opinions. These opinions have been derived in accordance with current
standards of practice and no warranty is expressed or implied. Standards of practice are
subject to change with time.
Pacific Scene Homes W.O. E2484-3-SC
Tract 98-12, Carlsbad August 6, 2001
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GeoSoils, Inc.
If you have any questions pertaining to this report or we may be of further service,
do not hesitate to contact this office. We appreciate the opportunity to be of servic
Respectfully submittedL.
GeoSoils, Inc.Reviewed by:
P. Ltjmp
Director of
REA-1
EPL/JPF/jh
Attachments:
A 7
'.?M\
Manager, REA-1 16
Appendix A - References
Appendix B - Health and Safety Plan
Appendix C - Chemical Laboratory Test Results
Distribution:(3) Addressee
(1) Pacific Scene Homes Onsite Superintendent Attn: Mr. Jones
Pacific Scene Homes
Tract 98-12, Carlsbad
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W.O. E2484-3-SC
August 6, 2001
PageS
GeoSoils, Inc.
APPENDIX A
REFERENCES
APPENDIX A
REFERENCES
California, State of, Environmental Protection Agency, 1992, "Supplemental Guidance for
Human Health Multimedia Risk Assessments of Hazardous Waste Sites and
Permitted Facilities", chapter 8, "DDT in Soil" Guidance for the Assessment of Health
Risk to Humans, dated July.
County of San Diego, Environmental Health Services, 2000, Site assessment and
mitigation (SA/M), manual.
GeoSoils, Inc., 2001, Safety and Health Plan for Sites with Potential for Exposure to
Hazardous Agricultural Chemical Compounds, W.O. E2484-3-SC, dated July 16.
, 2000, Second Addendum to 'Limited Phase I Environmental Site Assessment and
Agriculture Chemical Residue Survey, Magnolia Gardens Development, City of
Carlsbad, San Diego County,' W.O. E2484-SC, dated March 15,1999, by GeoSoils,
Inc. W.O. E2484-2-SC, dated April 4.
, 1999a, Addendum to 'Limited Phase I Environmental Site Assessment and
Agriculture Chemical Residue Survey, Magnolia Gardens Development, City of
Carlsbad, San Diego County,' W.O. E2484-SC, dated March 15,1999, by GeoSoils,
Inc." W.O. E2484-2-SC, dated December 1.
, 1999b, Limited Phase I Environmental Site Assessment and Agriculture Chemical
Residue Survey, Magnolia Gardens Development, City of Carlsbad, San Diego
County," W.O. E2484-SC, dated March 15.
Smucker, Stanford J., United States Environmental Protection Agency (USEPA), 2000,
Region IX, Region 9 Preliminary Remediation Goals (PRGs), October 1.
GeoSoils, Inc.
APPENDIX B
HEALTH AND SAFETY PLAN
GEOSOILS, INC.
SAFETY AND HEALTH PLAN
FOR SITES WITH POTENTIAL FOR EXPOSURE TO
HAZARDOUS AGRICULTURAL CHEMICAL COMPOUNDS
Project #:
Client Name:
E2484-3-SC
Pacific Scene Homes
Project Location: Magnolia Gardens Development. Carlsbad Tracts 98-12 & 00-05.
Carlsbad. San Diego County. California
CONTACTS
Contact Person: Edward P. Lump (760) 438-3155
Project Manager: Edward P. Lump Same
Plan Preparer: Edward P. Lump Same
APPROVALS
Preparation Date: 7-16-2001 Expiration Date: 8-16-2001
GeoSoils. Inc. Director of Environmental Services:
Edward P. Lump, REA-1 2 G 1924
Grading Contractor Site Safety Officer:
Date
Date
GeoSoils, Inc.
1.0 INTRODUCTION
This Safety and Health Plan (SHP) outlines the health and safety procedures to be used
while performing the environmental services described herein in Section 3.0. The
anticipated hazards are identified in Section 4.0. If additional work is to be completed, this
plan will be modified by the GeoSoils, Inc. (GSI) Safety and Health Coordinator or the Plan
Reviewer to incorporate the changes or a new SHP will be developed. The safety
procedures within this SHP can not be modified or altered by field personnel without
clearance from the GSI Safety and Health Coordinator or the Plan Reviewer.
This plan was developed with the best knowledge available at the time. If additional
information becomes available or site conditions change, the SHP will be modified if
necessary by the Safety and Health Coordinator or the Plan Reviewer prior to the
continuation of field work. In the event that a subcontractor's SHP differs from this plan,
the most restrictive SHP will be used after approval of the GSI Safety and Health
Coordinator and/or the Plan Reviewer. The GSI Safety and Health Coordinator conducting
the environmental training has completed the 40 hour hazardous waste training course as
required by GSI policy and OSHA (29CFR 1910.120).
The Site Safety Officer (i.e., Safety and Health Coordinator) will hold a site specific safety
meeting prior to start of work. During the site specific safety meeting the Site Safety Officer
will discuss: potential chemical and safety hazards; potential routes of exposure for each
chemical hazard; types, limitations, and proper use of Personal Protective Equipment
(PPE); and proper decontamination procedures. The Site Safety Officer is also responsible
for enforcing this site safety plan.
All GSI personnel and its subcontractors who will work in the potentially contaminated
areas of the site will read and agree to follow this SHP before performing any field work.
This will be documented by having all personnel sign the attached Plan Acceptance Form.
This SHP, a first aid kit, eye wash, telephone, and a fire extinguisher must be on site during
all field activities described in Section 3.0. The emergency contacts and the Action Levels
must be posted on site.
GeoSoils, Inc.
2.0 BACKGROUND
2.1 Brief Site History
Based upon review of historical photographs and maps of the subject property and vicinity,
it appeared that the site was undeveloped from at least 1891 to sometime in the early
1920's (GSI, 1999b). Photographs from 1928/1929 note farmhouses/barns associated with
orchards and cultivated land scattered throughout this portion of Carlsbad.
Photographs from 1953 indicated that cultivated crops and orchards remained within the
easterly and westerly property, respectively. The closest structures were visible along the
southern boundary of the northern leg of the site, which was also developed with cultivated
crops(and/or flowers?). Greenhouses were first detected onsite (along the northerly edge)
in photographs from 1967, including what appeared to be a packing shed in the north
central portion of the site. The western portion of the property appeared to consist of
undeveloped land (northwestern half) and dense orchard trees (southwestern half).
Photographs from 1974 indicate property improvements similar to conditions onsite prior
to demolition (i.e., storage/packing sheds, greenhouses, dirt roads, etc.).
Greenhouses recently covered the majority of the project area, as well as the immediately
adjacent property along the northern edge of the subject site (GSI, 1999b). Prior to
demolition, vegetation noted onsite consisted of weeds and remnants of assorted
ornamental flowers on Tract 98-12, with cultivated crops on Tract 00-05. Surface and
subsurface irrigation lines, and abandoned electrical boxes were noted. Structures
observed within Tract 98-12 also include an abandoned packing shed and cold storage
unit, two wooden storage sheds with concrete flooring (labeled "Poison Storage Area"),
what appeared to be a small locked wooden residential structure, and a mobile trailer. In
addition to personal vehicles, a small rubber-tire tractor and trailer-mounted tank with spray
apparatus were observed in the main compound. A small diesel-powered engine
(i.e., compressor) was also noted in the compound area. One of the wooden storage
sheds, located in the westerly portion of the property, was used as a residence. Assorted
agricultural materials are stored in the compound area and inside the large packing shed,
including metal and plastic drums, plastic buckets, and abandoned vehicles. Two small
coolant compressors were observed at the western edge of the metal cold storage unit.
Our assessment (GSI, 1999b), reported that the subject property (Gonzales Flowers,
1540 Magnolia Ave.) was listed in the County of San Diego Department of Environmental
Health HE17 listing. Details provided in the database indicated that the listing was due to
the storage of liquid nitrogen (fertilizer) and Daconil (restricted pesticide) on the property.
The database reported that no violations were issued and the status was "unknown." A
compliance inspection report, filed in 1991 for Gonzales Flowers (Business I.D. H99094)
noted the inventory consisted of liquid nitrogen fertilizer. No other information was
available. A request for public information from the Department of Agriculture, Weights and
Measures, regarding available pesticide use records for Gonzales Flowers found no
records for the two year period of 1997 and 1998.
GeoSoils, Inc.
As a part of the previous environmental assessment (GSI, 1999b), GSI interviewed the
property foreman for the past 16 years, Mr. Anselmo Mendo. To the best of his knowledge,
agricultural development onsite since 1982 consisted of flowers. Mr. Mendo noted that the
agricultural chemicals applied to the flowers were typically via spray mechanism within the
greenhouses. Mr. Mendo noted that all pesticides/herbicides used on the property were
kept in one locked wooden storage shed, which was labeled as a "Poison Storage Area."
Chemicals were stored in a secure, wooden box inside the main shed in the central
compound area (i.e., Tract 98-12). The entire storage shed was underlain by a concrete
slab on grade. Mr. Mendo noted that, to the best of his knowledge, pesticides/herbicides
were not stored in the small shed in the western portion of the property.
With the aid of the property foreman (Mr. Mendo), a general inventory of containers stored
in the aforementioned wooden box was made. Overall, the volume of containers observed
ranged from 1 quart to 3 gallons. Generally, the containers observed stored only small
amounts of their on'ginal volume, and in some cases were basically empty. Overall, there
were 6 pesticide containers (labeled Dimethoate 400; Penncap-M; Pounce EC; Vydate L;
Dipel 2X; and, Pyrenone) and 4 fungicide containers (labeled Daconcil 2787; Carbo-Vit;
Terraclor; and Triforine EC). No obvious signs of unusual spills, significant staining of
wood and./or concrete was detected. A mild but distinct odor was detected from the
wooden storage box.
Research of readily available references (see Appendix) did not locate data on two of the
chemicals stored onsite (Carbo-Vit and Pyrenone). Data on the remaining insecticides and
fungicides indicated that overall, they are not chemically persistent in nature. Half-lives in
soil were reported to range from two days to ten months. Aerobic and anaerobic
biodegredation were reported to range from less than 1 to 70 days. EPA Toxicity
Classifications ranged from Class I (highly toxic) to Class III (slightly toxic). Dipel and
Dimethoate were listed as General Use Pesticides.
Pevlous Scope of Work
To evaluate the potential for restricted agricultural chemical residues onsite, surficial soil
samples were collected from the upper 11/2 feet of existing earth materials onsite. A total
of 12 samples were collected from seven locations within the 5-acre site. All soil samples
were tested for Chlorinated Pesticides and PCB's (EPA test method 8080), Chlorinated
Herbicides (EPA test method 8150), and Organophosphorous pesticides (EPA test method
8140). Samples collected from the upper Vz foot of soils in the greenhouses, in the
compound area and near the storage sheds were also tested for Lead (EPA test method
6010). Samples collected from the compound area and near the western storage shed
were tested for Total Petroleum Hydrocarbons-TPH (gas and diesel) and semi-volatile
organic compounds (EPA test method 8270). Soil samples were not collected inside the
storage sheds due to concrete slabs.
Except for DDT, ODD, DDE, and Toxaphene, no constituents of the Chlorinated Pesticides
and PCB's were reported above the laboratory detection limits (i.e., non-detect).
Toxaphene was detected in one sample (HA-5 at 0- Vz feet) at a concentration of 1.04
GeoSoils, Inc.
milligrams per kilogram (mg/kg). Residual concentrations of Toxaphene were not detected
in the underlying sample, HA-5 at Vz to 1Vfe feet. Concentrations of DDT total (i.e.,
DDT/DDE/DDD) were detected in 11 of the 12 samples, ranging from 0.0079 mg/kg to
0.286 mg/kg. All constituents within the Chlorinated Herbicides and Organophosphorous
Pesticides suite were not detected above the detection limits. Data collected indicate that
concentrations of pesticides detected decrease with depth. For comparison purposes,
regulatory levels for the characterization of hazardous waste (i.e., Total Threshold Limit
Concentration) for DDT is 1.0 mg/kg and Toxaphene is 5.0 mg/kg. Preliminary Remedial
Goals, which combine existing USEPA toxicity values with generally accepted exposure
factors to estimate concentrations in residential soil that do not represent a cancer risk to
humans greater than one-in-one million (i.e., 1 x 10"6), are 1.7 mg/kg DDT and 0.4 mg/kg
for Toxaphene.
Test results for Lead in six of the seven samples were reported to range from 1.0 mg/kg
to 19.0 mg/kg. Total Petroleum Hydrocarbons (gas and diesel) were reported less than
detection limits (10 mg/kg). With the exception of bis (2-Ethylhexyl) phthalate, reported in
two samples at 0.072 mg/kg (HA-7) and 0.30 mg/kg (HA-6), no semi-volatile organic
compounds were encountered above the detection limits. All chemical laboratory test
results are presented in the referenced text (GSI, 1999b).
Where applicable, GSI used existing regulatory data as a screening tool for the detected
concentrations of pesticides and other contaminants within the property. Overall,
concentrations of the contaminants detected onsite were found to be less than established
criteria for a hazardous waste (Total Threshold Limit Concentration), and less than the
criteria established as a potential risk to human health (i.e., Preliminary Remedial Goals).
Of exception is the single sample concentration of Toxaphene detected in HA-5 at 0- Vz
feet, reported at a concentration of 1.04 mg/kg, which is less than the hazardous waste
criteria of 5 mg/kg, but greater than the potential human health risk value of 0.4 mg/kg.
This sample concentration appears to represent an outlier, and not representative of site
conditions.
Review of regulatory site screening values (i.e., Total Threshold Limit Concentration and
Preliminary Remedial Goals) indicated that overall, no significant measures are needed to
mitigate the residue concentrations of contaminants detected within the property.
After review of our initial environmental report and limited survey by the County Department
of Environmental Health (DEH), additional field work was requested. The purpose of the
additional work (GSI, 1999a) was to provide information as requested by the San Diego
County DEH-Voluntary Assistance Program in an October 12, 1999 DRAFT letter. In
addition, the data submitted was based upon verbal conversations with Ms. Apecechea
(project manager, DEH Site Assessment and Mitigation Program) on October 12 and
November 5,1999, as well as subsurface data collected from a boring drilled on the site
on November 5, 1999. "Perched" groundwater was encountered within the terrace
deposits at a depth of 20 to 27 ± feet, as well as at the terrace deposits/Santiago Formation
contact, at a depth of approximately 33± feet. The boring was backfilled with a bentonite
slurry (i.e., Enviroplug-medium). A groundwater sample was collected from the boring and
GeoSoils, Inc.
transported to the California Department of Health Services (DHS) certified laboratory the
same day, following proper procedures. Test results reported a Total Recoverable
Petroleum Hydrocarbons (TRPH) concentration of 31.8 milligrams/liter (mg/l). Total
Petroleum Hydrocarbons (TPH)-gas and TPH-diesel laboratory test results were reported
as less than 0.05 mg/l and 0.5 mg/l, respectively. Concentrations of Benzene,
Ethylbenzene, and Toluene were reported by the laboratory as less than 0.3 micrograms
per liter (/ug/l). Concentrations of Xylenes (Total) were reported by the laboratory as less
than 0.6 ngfl A MTBE concentration of 3.4 //g/l was reported. The PRGs for MTBE is
listed (for tap water) as 20.0//g/l. Based upon the relatively low concentrations of TRPH
and MTBE reported above, as well as the absence of detectable concentrations of TPH-
gas and diesel, BTEX, Chlorinated Pesticides, and PCB's in the "perched" groundwater
encountered on the property, it appears that agricultural operations on the property have
not adversely affected "perched" groundwater. It is our opinion, therefore, that the initial
survey report recommendations (GSl, 1999b) remain applicable.
A third round of testing (GSl, 2000) was required by the County DEH in an October 12,
1999 DRAFT letter. Additional testing was also based upon verbal conversations with Ms.
Apecechea (project manager, DEH Site Assessment and Mitigation Program), as well as
chemical test data collected from hand auger borings drilled on the Magnolia Gardens II
parcel (APN 205-220-1 2). Chemical test data was also collected from hand auger borings
excavated through concrete slab core-holes in the two abandoned storage sheds on the
original Magnolia Gardens parcel. There were no chemical constituents detected in the
EPA 8140 test method suite. From the EPA 8080 test method suite, concentrations of
DDT/DDD/DDE (i.e., DDT^^) were detected in nine (9) of the ten (10) samples collected,
and Heptachlor Epoxide was detected in one (1) sample. Concentrations of DDT^,^ were
reported to range from "less than detection limits" to 0.6125 mg/kg. For comparison
purposes, regulatory action levels for hazardous waste criteria (i.e., Total Limit Threshold
Concentration) for DDT^^ is 1 .0 mg/kg. All sample concentrations decreased with depth.
Heptachlor Epoxide was detected at a concentration of 0.0005 mg/kg in sample HA-8 at
1/2 a foot. From the EPA 8150 test method suite, 2,4,5-T was detected in three (3) samples
and 2,4-DB was detected in one (1) sample. Concentrations of 2,4,5-T was reported to
range from "less than detection limits" to 0.0064 mg/kg. A concentration of 2,4-DB was
detected at a level of 0.0089 mg/kg. All sample concentrations decreased with depth.
Residue concentrations of DDT^^, Heptachlor Epoxide, 2,4,5-T, and 2,4-DB detected in
soil samples were compared to the PRGs for residential soil concentrations, which was
reported as 1 .7 mg/kg for DDT, 0.053 mg/kg for Heptachlor Epoxide, 490 mg/kg for 2,4-
DB, and 61 0 mg/kg for 2,4,5-T. Based upon the relatively low concentrations of agricultural
chemical residues detected, it appeared that agricultural operations on the property have
not generated significant agricultural chemical residues on the subject property. It was
concluded, therefore, that the initial survey report recommendations remain applicable.
GeoSoils, Inc.
3.0 FIELD ACTIVITIES
3.1 Work Plan
At the recommendation of the County Department of Environmental Health, surficial soils
with concentrations of Toxaphene greater than the Preliminary Remedial Goal criteria
should not be placed within five (5) feet of street subgrade within the right-of-way only, to
mitigate the potential for human contact. Soils requiring remediation should not be placed
in canyon bottoms or below subdrains, where there is potential contact with groundwater.
Affected soils should be buried within the property boundary only, and placed so as not
to adversely affect surface water.
GSI estimated that the upper one (1) foot of soil in an one-acre grid onsite will require
remediation. Specifically, remedial earthwork is required in the area covering all of Lot 8,
the western half of Lots 9, and Brady Circle (East) Station 10+00 to 12+80±. The
estimated quantity of soils requiring remediation is on the order of 1,110± cubic yards
(yds3).
Removals and burial should be monitored by a representative of this office. Sampling
should be conducted at two (2) locations during grading (after removal of the affected
earth materials onsite) to verify that all affected earth materials have been removed and
buried. If detectable concentrations of restricted pesticides are encountered, additional
removal would occur until earth materials with non-detectable concentrations are
encountered.
It is our opinion that preferential handling procedures are needed during the initial stage
of brushing and grading of the project. These procedures may include, but may not be
limited to indigent dust control with moisture conditioning, weather monitoring, and
personal protection for workers. Moisture conditioning is recommended during brushing
and mass grading. Weather conditions should be monitored during the initial stages of
grading on the level terrace area Limiting the brush and surficial soil removal during high
wind conditions should be accomplished.
All removal verification samples will be gathered and handled according to EPA standard
procedures and immediately sealed, labeled, placed in a chilled ice chest and delivered
to a California Department of Health Services (DHS) certified laboratory the same day,
accompanied by a Chain-Of-Custody Record. As per regulation, all samples will be taken
and logged under the direct supervision of a California Registered Geologist or Engineer.
To prevent cross-contamination between sampling intervals, all equipment will be washed
with a mild solution of tri-sodium phosphate 0"SP), rinsed with clean tap water, and final
rinsed with distilled water.
GeoSoils, Inc.
3.2 Subcontractors to be Used
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4.0 JOB HAZARD ANALYSIS
Based on the previous agricultural use of the site as presented in the referenced reports
on the subject site (Appendix), the chemicals listed below are known potential health
hazards. Since a site safety plan addresses the "worst case" situation, this plan addresses
the health hazards of the compounds below with respect to worker safety, should these
compounds be encountered.
4.1 Chemicals
• Toxaphene
4.2 Physical Hazards
• Heavy equipment operation.
• Becoming entwined in rotating tools.
• Brush, equipment, or gas-main fires.
• Exposure to excessive noise.
• Exposure to excessive outside temperatures (heat stress).
Physical hazards will be controlled by a combination of personal protective equipment
(PPE) use and training of employees in safe and proper operation of equipment they will
be using at the site. Subcontractors are responsible for the training of their employees in
the proper use of their equipment.
4.3 Hazard Control
Chemical Hazards
There will be no eating, drinking, or smoking during remedial grading of the
contaminated soils.
During grading operations, personal protection (i.e., clothing) is not required,
unless contaminated soils are being handled by individuals.
Based upon previous laboratory test results and the chemical nature of
agricultural residues, contamination onsite appears to be non-volatile;
therefore air monitoring is not anticipated.
Physical Hazards
Operation of heavy equipment in excavation or other activities presents
potential physical hazards to personnel. The following precautions should
be observed whenever heavy equipment is in use:
8
GeoSofls, Inc.
Personnel should at all times be aware of the location and operation
of heavy equipment, and take precautions to avoid getting in the way
of its operation. Never assume that the equipment operator sees you;
make eye contact and use hand signals to inform the operator of your
intent.
Traffic safety vests are required for GSI personnel working near
mobile heavy equipment, such as backhoes and other excavators.
Never walk directly in back of, or to the side of, heavy equipment
without the operator's knowledge.
When an equipment operator must operate in tight quarters, the
equipment subcontractor should provide a person to assist in guiding
the operator's movements.
Keep all non-essential personnel out of the work area.
9
GeoSoils, Inc.
5.0 EMERGENCY CONTACTS AND PROCEDURES
In case of any situation or unexpected occurrence which requires outside assistance or
support, the proper contact from the following list should be made:
Agency Name of Contact Telephone No.
Ambulance 911
Fire 911
Police 911
Hospital:
Tri-City Medical Center
4002 Vista Way
Oceanside, CA 92056
(760)724-8411
(Thomas Guide pg.1107, C2)
GSI Project Manager: Edward P. Lump
Office: (760) 438-3155
Mobile: (760) 801-7090
Poison Control Center (619) 543-6000
In the event of an emergency, call 911.
10
GeoSoils, Inc.
CHEMICAL RISK INFORMATION
Name: DDT (total)
Exposure and Explosive Limits:
EXPOSURE LIMITS:
CAL-OSHA 8 hour recommended exposure limit = 0.5 mg/m3
NIOSH 8 hour time weighted average = 0.5 mg/m3
NIOSH immediately dangerous to life or health concentrations (IDLH)= 500 mg/m3
NIOSH recommends the substance be treated as a suspected human carcinogen.
EXPLOSIVE LIMITS: Not applicable
Appearance and Odor:
• Colorless crystals or off-white powder with a slight aromatic odor.
• Pesticide.
Symptoms:
• CONTACT: Convulsions, headache, fatigue, vomit.
• INHALATION/INGESTION: Irritation eyes and skin, apprehension, dizziness, confusion,
malaise (vague feeling of discomfort).
First Aid:
• EYE CONTACT: Immediately wash the eyes with large amounts of water, occasionally
lifting the lower and upper lids. Seek medical attention immediately.
• SKIN CONTACT: Wash the contaminated skin with soap and water. If this chemical
penetrates through the clothing, immediately remove the clothing, wash the skin with soap
and water, and seek medical attention promptly.
• INHALATION: If a person breathes in large amounts of this chemical, move the exposed
person to fresh air at once. If breathing has stopped, perform artificial respiration. Keep the
affected person warm and at rest. Seek medical attention as soon as possible.
• INGESTION: Seek medical attention immediately.
Reference: National Institute for Occupational Safety and Health (NIOSH), 1994, NIOSH Pocket
Guide to Chemical Hazards, U.S.Dept. of Health and Human Services, dated June.
11
GeoSoils, Inc.
Name: Toxaphene (i.e., Chlorinated camphene)
Exposure and Explosive Limits:
EXPOSURE LIMITS:
CAL-OSHA 8 hour recommended exposure limit = 0.5 mg/m3 (skin)
NIOSH immediately dangerous to life or health concentrations (IDLH)= 200 mg/m3
NIOSH recommends the substance be treated as a suspected human carcinogen.
EXPLOSIVE LIMITS: Not applicable
Appearance and Odor:
• Amber, waxy solid with a mild, piney, chlorine-and camphor-like odor.
• Insecticide.
Symptoms:
• CONTACT: Skin (carcinogenic).
• INHALATION/INGESTION: Nausea, confusion, agitation, convulsions, tremors,
unconsciousness.
First Aid:
• EYE CONTACT: Immediately wash the eyes with large amounts of water, occasionally
lifting the lower and upper lids. Seek medical attention immediately.
• SKIN CONTACT: Wash the contaminated skin with soap and water. If this chemical
penetrates through the clothing, immediately remove the clothing, wash the skin with soap
and water, and seek medical attention promptly.
• INHALATION: If a person breathes in large amounts of this chemical, move the exposed
person to fresh air at once. If breathing has stopped, perform artificial respiration. Keep the
affected person warm and at rest. Seek medical attention as soon as possible.
INGESTION: Seek medical attention immediately.
Reference: National Institute for Occupational Safety and Health (NIOSH), 1994, NIOSH Pocket
Guide to Chemical Hazards, U.S.Dept. of Health and Human Services, dated June.
12
GeoSoils, Inc.
ACCIDENT/EXPOSURE REPORT
Employee Name Date of Birth
Home Address Phone No.
Sex: Male Female Job Title S.S. No.
Office No. Office Location Date of Hire
Hours Usually Worked: Hours Per Day Hours Per Week Total Hours Weekly
Where did accident or exposure occur? (include address)
County On employer's premises? Yes No
What was employee doing when injured? (be specific)
How did the accident or exposure occur? (describe fully)
What steps could be taken to prevent such an occurrence?
Object or substance that directly injured employee
Describe the injury or illness Part of body affected
Name and address of physician
If hospitalized, name and address of hospital
Date of injury/illness Time of day Loss of one or more days of work? Yes/No
If yes, date last worked
Has employee returned to work? If yes, date returned Did employee die? If yes, date
Completed by (print) Signature
Title Date
An accident/exposure report must be completed by the supervisor or Site Safety Officer immediately upon
learning of the incident. The completed report must be immediately transmitted to the office administrative
manager and the GSI Safety and Health Coordinator.
13
GeoSoils, Inc.
PLAN ACCEPTANCE FORM
PROJECT HEALTH AND SAFETY PLAN
Instructions: This form is to be completed by all GSI and Pacific Scene Homes personnel
to work on the subject project work site.
Project No. E2484-3-SC
Client/Property Owner/Developer: Pacific Scene Homes
2505 Congress Street, Suite 200
San Diego, California 92110
I represent that I have read and understood the contents of the above plan and agree to
perform my work in accordance with it.
Date
Signed Date
Signed Date
Signed Date
14
GeoSoils, Inc.
SUBCONTRACTOR PLAN ACCEPTANCE FORM
The following subcontractors have been hired to perform work during this operation. All
employees of subcontractors hired to perform work with the potential for exposure to the
above mentioned contaminants have been notified of and understand the chemical risks.
Name: /Tel. No.: (7
Address: \f t
Authorized Representative:
Services Provided: Excavation and Grading Services
Signature
<T
Signature
Signature
Signature
Signature
Signature
Date
Date
15
GeoSoils, Inc.
APPENDIX
REFERENCES
California, State of, Environmental Protection Agency, 1992, "Supplemental Guidance for
Human Health Multimedia Risk Assessments of Hazardous Waste Sites and
Permitted Facilities", chapter 8, "DDT in Soil" Guidance for the assessment of health
risk to humans, dated July.
County of San Diego, Environmental Health Services, 2000, Site assessment and
mitigation (SA/M), manual, dated January 20.
GeoSoils, Inc., 2000, Second Addendum to, "Limited Phase I Environmental Site
Assessment and Limited Agricultural Chemical Residue Survey, Magnolia Gardens
Development, City of Carlsbad, San Diego County, California," W.O. E2484-2-SC,
dated April 4.
, 1999a, Addendum to," Limited Phase I Environmental Site Assessment and Limited
Agricultural Chemical Residue Survey, Magnolia Gardens Development, City of
Carlsbad, San Diego County, California," W.O. E2484-2-SC, dated December 1.
, 1999b, Limited Phase I Environmental Site Assessment and Limited Agricultural
Chemical Residue Survey, Magnolia Gardens Development, City of Carlsbad, San
Diego County, California, W.O. E2484-SC, by GeoSoils, Inc., dated March 15.
, 1998, Preliminary Geotechnical Evaluation, Magnolia Gardens Development, City
of Carlsbad, California, W.O. 2484-A-SC, dated August 7.
Mackay, D., Shiu, W., Ma, K., 1997, Illustrated Handbook of Physical-Chemical Properties
and Environmental Fate for Organic Chemicals, volume V, Pesticide Chemicals,
Lewis Publishers, CRC Press LLC.
Oregon State University, 1995-1996 revisions, The Extension Toxicology Network
(EXTOXNET), electronic files in cooperative effort with Univ. Of Calif.-Davis,
Michigan State Univ., Cornell Univ., and Univ. Of Idaho.
Smucker, Stanford J., United States Environmental Protection Agency (USEPA), 2001,
Region IX, Region 9 Preliminary Remediation Goals (PRGs), dated November 1.
16
GeoSoils, Inc.
E
E
I
I
APPENDIX C
E
E
I
i
E
C
CHEMICAL LABORATORY TEST RESULTS
vironmental
Laboratories, Inc.
August 03, 2001
Ed Lump
Geosoils
5741 Palmer Way
Cartsbad.CA 92008-7248
Subject: Calscience Work Order No.: 01 -08-0141
Client Reference: GS080201 -12/82484-3-SC
Dear Client:
Enclosed is an analytical report for the above-referenced project. The samples
included in this report were received 8/3/2001 and analyzed in accordance with
the attached chain-of-custody.
Unless otherwise noted, all analytical testing was accomplished in accordance with the
guidelines established in our Quality Assurance Program Manual, applicable standard
operating procedures, and other related documentation. The results in this analytical
report are limited to the samples tested and any reproduction thereof must be made in
its entirety.
If you have any questions regarding this report, require sampling supplies or field
services, or information on our analytical services, please feel free to call me at
(714) 895-5494.
ice Environmental Michael J. Crisostomo
Laboratories, Inc. Quality Assurance Manager
Robert Stearns
Project Manager
7440 Lincoln Way, Garden Grove, CA 92841-1432 • TEL (714) 895-5494 • FAX: (714) 894-7501
fca/sc/ence
Environmental
Laboratories, Inc.
ANALYTICAL REPORT
Geosoils
5741 Palmer Way
Carlsbad.CA 92008-7248
Project: GS080201 -1 2/82484-3-SC
Client Sample Number:
VS-1 ;
Parameter
Alpha-BHC
Gamma-BHC
Beta-BHC
Heptachlor
Delta-BHC
Aldrin
Heptachlor Epoxlde
Endosulfan I
Dleldrln
4.4--DDE
Surrogates:
Decachlorobiphenyl
V5-2 •- •:•• .- -:
Parameter
Alpha-BHC
Gamma-BHC
Beta-BHC
Heptacnlor
Delta-BHC
Aldrin
Haptachlor Epoxide
Endosulfan I
Dieldrin
4.4'-DDE
Surrogates:
Decachlorobiphenyl
Lab Sample
Number:
.''. .I-;::.;.":;'--. '_,;';•
Result
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
REC 1%)
146
• ',: •• •'•• •:••: •;;
Result
ND
ND
ND
ND
ND
ND
ND
NO
ND
ND
REC t%\
136
••'':' .--.pi?
5k BE
5.0 1
5.0 1
5.0 1
5.0 1
5.0 1
5.0 1
5.0 1
5.0 1
5.0 1
5.0 1
Control
Limits
50-130
: ....'• ; oit-
RL DF
5.0 1
5.0
5-0
5.0
5.0
5.0
5.0
5.0 1
5.0 1
5.0 1
cjHjjmi
Limits
50-130
0^141:4
Qya) Units
ug/kg
ug/kg
ug/kg
ug/kg
ug/kg
ug/kg
ug/kg
ug/kg
ug/kg
ug/kg
Qual
2
08-0141-2
Qual Units
ug/kg
ug/kg
ug/kg
ug/kg
ug/kg
ug/kg
ug/kg
ug/kg
ug/kg
ug/kg
Qual
2
Date Received:
Work Order No:
Preparation:
Method:
Date Date
Collected: Matrix: Prepared:
'• :;oiM2roi;..:-'ri:;-^biid;.;';-'i
Parameter
Endrin
Endrin Aldehyde
4,4'-DDD
Endosulfan II
4,4'-DDT
Endosulfan Sulfate
Methoxychlor
Chlordane
Toxaphene
Endrin Ketone
Surrogates:
2,4,5,6-Tetrachloro-m-Xylene
08/Q2/01 . .Solid" ;:
Parameter
Endrin
Endrin Aldehyde
4,4'-DDD
Endosulfan II
4.4'-DDT
Endosulfan Sulfate
Methoxychlor
Cnloroane
Toxaphene
Endrin Keione
Surrogates:
2.4 ,5,6-Telrachlorc-m-Xylene
06/02/01
Result
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
REC <%)
85
08/02/01 ;:,:
Result
ND
ND
ND
ND
ND
ND
ND
ND.
ND
ND
REC (%)
60
Date
Analyzed:
08/03/01
Ek
5.0
5.0
5.0
5.0
5.0
S.O
5.0
50
100
5.0
Control
Umits
50-130
08/03/01
BL
5.0
5.0
5.0
5.0
5.0
5.0
5.0
50
100
5.0
Control
Limits
50-130
08/03/01
01-08-0141
EPA 3545
EPA 8081 A
Page 1 of 2
QC Batch ID:
:K'-C
DF
1
1
1
1
1
1
1
1
1
1
iOWH5vi:>'' '"
Qual Units
ug/kg
ug/kg
ug/kg
ug/kg
ug/kg
ug/kg
ug/kg
ug/kg
ug/kg
ug/kg
Qual
;•:: 0108025
EE
1
1
1
1
1
1
1
1
1
1
Qua! Units
ug/kg
ug/kg
ug/kg
ug/kg
ug/kg
ug/kg
ug/kg
ug/kg
ug/kg
ug/kg
Qual
RL • Reporting Limit , DF - Dilution Factor , Qual - Qualifiers
7440 Lincoln Way, Garden Grove, CA 92841-1432 • TEL (714) 895-5494 • FAX: (714) 894-7501
ra/sc/ence
aboratories, Inc.
ANALYTICAL REPORT
Geosoils
5741 Palmer Way
Carlsbad.CA 92008-7248
Date Received:
Work Order No:
Preparation:
Method:
08/03/01
01-08-0141
EPA 3545
EPA 8081A
Project: GS080201-12/82484-3-SC Page 2 of 2
Client Sample Number.
Mftthod Blank .••]•.. :• ." .'"••' .:.M'--
Lab Sample
Number
.'.•.'•;.:." '.'..I1.' ..f'r 095-01 >tirl£2;234,'
Date
Collected:
!. ,-;•;. =**•:•* -:
Date
Matrix: Prepared:
•rSblid^^-^ipS/OJ/fll^
Date
Analyzed: QC Batch ID:
:^3iwi^^fl^4{7:..";.,:
Parameter
Alpha-BHC
Gamma-BHC
Beta-BHC
Heptachlor
Dalta-BHC
Aldrin
Haptachlor Epoxide
Endosulfan I
Dieldrin
4,4'-DDE
SuiroQates:
Decachlorobiphenyl
Result
NO
ND
NO
ND
ND
ND
ND
ND
ND
ND
REC r%l
129
RL DF Qual Units Parameter
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
Control
Limits
50-130
1 ug/kg Endrin
1 ug/kg Endrin Aldehyde
1 ug/kg 4,4'-DDD
1 ug/kg Endosulfan II
1 ug/kg 4.4-DOT
1 ug/kg Endosulfan Sulfate
1 ug/kg Methoxychlor
1 ug/kg Chlordane
1 ug/kg Toxaphene
1 ug/kg Endrin Ketone
Result
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
Qual Surrogates! REC I
2,4,5,6-Tetrachloro-m-Xylene 86
RL DF Qual Unite
5.0
5.0
5.0
5.0
5.0
5.0
5.0
50
100
5.0
Control
Limits
50-130
ug/kg
ug/kg
ug/kg
ug/kg
ug/kg
ug/kg
ug/kg
ug/kg
ug/kg
ug/kg
Qual
RL • Reporting Umit , DF - Dilution Factor . Qual - Qualifiers
7440 Lincoln Way, Garden Grove, CA9284M432 • TEL: (714) 895-5494 • FAX: (714)894-7501
'alscience GLOSSARY OF TERMS AND QUALIFIERS
vironmental
laboratories, Inc.
Work Order Number: 01-08-0141
Qualifier Definition
2 Surrogate spike compound was out of control due to matrix interference.
The associated method blank surrogate spike compound was in control
and, therefore, the sample data was reported without further clarification.
ND Not detected at indicated reporting limit.
^nm/^A 7440 Lincoln Way, Garden Grove, CA 92841-1432 • TEL: (714) 895-5494 • FAX: (714) 894-7501
f 1 I 1 I I I 1 I I I ! 1 I 1 I I I I i I till i l i
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Transglobal Environmental Geochemistry
432 N. Cedros Avenue
Solana Beach, CA 92075
(858) 793-0401 Fax: (858) 793-0404
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TEG Project #:
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Client: •<>«-•* \^*\\ t ,"J. f~- : .
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