HomeMy WebLinkAbout3949; Agua Hedionda Lift Station & Force Main; Agua Hedionda Lift Station & Force Main; 2009-09-25ENVIRONMENTAL SOIL AND
GROUNDWATER SAMPLING
AGUA HEDIONDA LIFT STATION
AND FORCE MAIN
CARLSBAD, CALIFORNIA
PREPARED FOR
Brown and Caldwell
9665 Chesapeake Drive, Suite 201
San Diego, California 92123
PREPARED BY
Ninyo & Moore
Geotechnical and Environmental Sciences Consultants
5710 Ruffin Road
San Diego, California 92123
September 25, 2009
Project No. 106044003
Agua Hedionda Lift Station and Force Main September 25, 2009
Carlsbad, California Project No. 106044003
106044003 R.doc i
TABLE OF CONTENTS
Page
1. INTRODUCTION....................................................................................................................1
2. SCOPE OF SERVICES............................................................................................................1
3. PROJECT DESCRIPTION ......................................................................................................2
4. SITE DESCRIPTION...............................................................................................................2
5. ENVIRONMENTAL FIELD ACTIVITIES ............................................................................3
5.1. Health and Safety Plan..................................................................................................3
5.2. Drilling and Soil Sampling...........................................................................................3
5.3. Field Quality Assurance and Quality Control Procedures............................................4
5.4. Analytical Testing Program..........................................................................................5
5.5. Site Restoration/Assessment-Derived Waste Management..........................................5
6. FINDINGS................................................................................................................................6
7. CONCLUSIONS ......................................................................................................................7
8. RECOMMENDATIONS..........................................................................................................8
9. LIMITATIONS.........................................................................................................................9
10. REFERENCES.......................................................................................................................11
Tables
Table 1 – Soil Sample Analytical Results
Table 2 – Groundwater Grab Sample Analytical Results
Figures
Figure 1 – Site Location Map
Figure 2 – Boring Location Map – North
Figure 3 – Boring Location Map – South
Figure 4 – Soil and Groundwater Sample Analytical Results - North
Figure 5 – Soil and Groundwater Sample Analytical Results - South
Appendices
Appendix A – Field Sampling Procedures and Boring Logs
Appendix B – Analytical Laboratory Reports
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1. INTRODUCTION
In accordance with your request, our proposal dated February 27, 2008, and the subsequent revi-
sions, we have performed environmental soil and groundwater sampling for the proposed Agua
Hedionda sewer lift station and force main project located in Carlsbad, California (Figure 1). The
sampling was performed concurrently with a geotechnical evaluation also performed by Ninyo &
Moore and discussed under separate cover (Ninyo & Moore, 2009). This report describes our
field activities and presents our findings, conclusions, and recommendations regarding the envi-
ronmental conditions at the site.
2. SCOPE OF SERVICES
Ninyo & Moore’s environmental scope of services for this project included the following:
• Prepared a site-specific health and safety plan (HASP).
• Collected soil samples from nine borings (i.e., B-6 through B-10, B-12, B-16, B-20, and
B-22) advanced as part of the geotechnical evaluation at approximately 5 foot depths inter-
vals, to total depth of the boring or to the groundwater interface (if encountered).
• Collected groundwater grab samples from borings (i.e., B-9, B-12, B-14, B-17, B-18, and
B-22), utilizing a disposable bailer, when groundwater was encountered during drilling and
was of sufficient quantity for sampling requirements.
• Submitted 51 soil samples and six groundwater samples to a fixed-base, state-certified
laboratory for analysis of total petroleum hydrocarbons extended range (TPH-e) by United
States Environmental Protection Agency (USEPA) test method 8015B(M) and volatile or-
ganic compounds (VOCs) and fuel oxygenates by USEPA test method 8260B. One soil
sample per boring and two groundwater samples were additionally analyzed for Title 22
metals by USEPA test method 6010B/7471, semi-volatile organic compounds (SVOCs) by
USEPA test method 8270C, polychlorinated biphenyls (PCBs) by USEPA 8080,
organochlorine pesticides (OCPs) by USEPA test method 8081A, and pH by USEPA method
9040. Two soil samples were selected for additional analysis for OCPs by USEPA test
method 8081A. • Submitted six trip blank samples to a state-certified laboratory for analysis of VOCs and fuel
oxygenates by USEPA test method 8260B.
• Coordinated disposal of investigative derived wastes at appropriate facilities.
• Prepared this report documenting environmental sampling field activities, including tabu-
lated analytical data, analytical reports accompanied with chain of custody and quality
Agua Hedionda Lift Station and Force Main September 25, 2009
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assurance/quality control documentation, appropriate figures and tables, and provide conclu-
sions and recommendations.
3. PROJECT DESCRIPTION
Based on the plans provided by the client, the overall proposed pipeline alignment begins at a
point just north of the inlet for Agua Hedionda in the City of Carlsbad, and trends south along the
east side of the railroad tracks, through the NRG Energy (Cabrillo Power) Encina Power Plant
site, past Cannon Road, past Palomar Airport Road, and ends at the Encina Water Pollution Con-
trol Facility. The segment of the alignment from Cannon Road to the Encina Water Pollution
Control Facility will trend along Avenida Encinas (Figures 2 and 3). Plans also include the con-
struction of a pipe bridge across Agua Hedionda Lagoon and several microtunneling and
horizontal directional drilling segments along the pipeline alignment.
The proposed lift station site is located east of the railroad tracks and south of the lagoon inlet, a
portion of which will be cut into the hillside (Figure 2). We understand that the station will have
a wet well with a base elevation of approximately 15 feet above mean sea level (MSL) to match
the existing lift station wet well. The new lift station site will include an emergency storage tank,
grinders, deep wet well, generator room, chemical storage, metering flume, junction structure,
pipelines, and ancillary facilities. The existing lift station, also on the east side of the railroad
tracks, will be replaced by a proposed coastal rail trail.
4. SITE DESCRIPTION
The project site is currently developed and occupied by existing pipelines, the North County
Transit District railway, Encina Power Plant, and paved roads. The proposed lift station site is in
a sloping area, with elevations ranging from approximately 10 feet to 56 feet MSL. A concrete
lined basin exists along the northern boundary of the lift station site. Surface elevations along the
pipeline alignment range from about 10 feet MSL at the northern end to about 78 feet MSL
where the pipeline crosses Palomar Airport Road. Vegetation, in areas not covered by existing
improvements, generally consists of a light to moderate growth of grass and brush.
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5. ENVIRONMENTAL FIELD ACTIVITIES
Our field exploration of the subject site included soil and groundwater sampling (performed
concurrently with a geotechnical investigation) conducted in November 2008 and June 2009. The
subsurface evaluation consisted of drilling 24 exploratory borings to depths of up to approxi-
mately 165 feet, which were sampled as part of the geotechnical evaluation. Environmental soil
and/or groundwater samples were additionally collected from 12 of the 24 borings (i.e., B-6
through B-10, B-12, B-14, B-16, B-17, B-18, B-20, and B-22), herein referred to as environ-
mental borings. The results of the geotechnical evaluation are reported under separate cover
(Ninyo & Moore, 2009). The following sections summarize the environmental field activities.
5.1. Health and Safety Plan
Ninyo & Moore prepared a site-specific HASP, which identified the potential chemical and
physical hazards that may be encountered during field activities for the project. In addition, the
HASP provided guidelines for use of personal protective equipment based on site-specific con-
ditions, location and directions to the nearest hospital, and contingency plans. A copy of the
HASP is on file at Ninyo & Moore and is available for review. The HASP was on site during
field activities. A site safety meeting was held in the morning, and field personnel reviewed and
signed copies of the employee acknowledgment and field health and safety meeting forms,
which are included in the HASP, prior to the commencement of work at the site.
5.2. Drilling and Soil Sampling
In November 2008 and June 2009, Ninyo & Moore personnel supervised the drilling of
24 exploratory borings, of which 12 were sampled as part of the environmental evaluation
(i.e., B-6 through B-10, B-12, B-14, B-16, B-17, B-18, B-20, and B-22) (Figures 2 and 3).
The environmental borings were advanced using a truck-mounted drill rig equipped with
8.25-inch diameter hollow-stem augers. The boring locations were selected based on the re-
sults of our background review, geotechnical field reconnaissance, and discussions with the
client. The approximate locations of the exploratory borings are presented on Figures 2 and 3.
The boring logs are presented in Appendix A.
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Soil samples for environmental analysis collected from borings B-12, B-16, B-20, and B-22
were collected utilizing a modified split-barrel drive sampler. Once the sampler was recov-
ered, the soil was placed into laboratory supplied glass jars. Environmental soil samples
collected from borings B-6 through B-10 were collected at approximate 5-foot intervals be-
low the location of the geotechnical samples with a standard penetration test sampler, which
was driven approximately 1.5 feet in advance of the hollow-stem auger by a 140-pound
auto-trip hammer. The least disturbed soil sample was covered on both ends by Teflon™
sheeting and sealed with plastic end caps. The soil sample containers were labeled with per-
tinent information, and placed in a cooler for transport by courier to Calscience
Environmental Laboratories of Garden Grove, California, a state-certified laboratory.
Upon retrieving the sampler from the borehole, the soil was logged according to the Unified
Soil Classification System. Copies of the boring logs are included in Appendix A. Soil cut-
tings and decontamination fluids were collected and placed into Department of
Transportation (DOT)-compliant drums and placed on site pending disposal at a permitted
facility or disposition at the site.
Groundwater grab samples were collected from borings B-9, B-12, B-14, B-17, B-18, and
B-22. The samples were collected by filling laboratory-supplied sample containers directly
from new, disposable plastic bailers.
5.3. Field Quality Assurance and Quality Control Procedures
All non-dedicated equipment was assembled, cleaned, and calibrated (if required) according
to the manufacturers’ specifications prior to arriving in the field. Drilling equipment was de-
contaminated using a high-pressure wash system. Sampling equipment and the water-level
probe and cable used to measure static water levels were decontaminated before and after
field use and between uses in different boring locations using a three-step wash and rinse
with phosphate-free detergent and potable water solution followed by potable and distilled
water rinses. In addition to the use of cleaned equipment, a new pair of disposable nitrile
gloves was worn by sampling personnel during sampling of each boring.
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Field quality assurance and quality control samples, consisting of trip blanks, were analyzed
to evaluate if samples were contaminated during transport. The trip blanks originated at the
laboratory as 40-milliliter vials typically used for VOC analysis. The vials were filled at the
laboratory with reagent-grade, organic-free water. The trip blanks were transported to the
field with the empty containers that were used for sample collection. One trip blank accom-
panied the sample transport containers that held water and/or soil samples for VOC analysis
back to the laboratory. The trip blanks were analyzed for VOCs and fuel oxygenates by
USEPA test method 8260B.
5.4. Analytical Testing Program
Soil and groundwater samples were analyzed for TPH-e by USEPA test method 8015B(M)
and VOCs and fuel oxygenates by USEPA test method 8260B. One soil sample per boring
and two groundwater samples were additionally analyzed for Title 22 metals by USEPA test
method 6010B/7471, SVOCs by USEPA test method 8270C, PCBs by USEPA 8080, OCPs
by USEPA test method 8081A, and pH by USEPA method 9040.
Upon receipt of the analytical results, two additional soil samples collected from B-6 were
analyzed for OCPs by USEPA test method 8081A; however, the samples had exceeded the
holding time specified for that analysis. Although the samples had exceeded their holding
time, the data were considered to be usable for qualitative purposes.
5.5. Site Restoration/Assessment-Derived Waste Management
Ninyo & Moore left the site in an orderly condition with equipment, unused materials, and
other miscellaneous items resulting from, or used in, site activities removed from the site.
Soil cuttings and decontamination fluids were collected and placed into DOT-compliant
drums and placed on site pending disposal at a permitted facility or disposition at the site.
The drums containing assessment-derived waste from the November 2008 activities were
characterized as non-hazardous waste and transported Ocean Blue Environmental Ser-
vices, Inc., a licensed-hazardous waste hauler, to Crosby and Overton in Long Beach,
California for disposal. Six drums containing assessment-derived waste (four soil drums
Agua Hedionda Lift Station and Force Main September 25, 2009
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and two wastewater drums) from the June 2008 activities were characterized as non-
hazardous waste and are stored on-site pending disposal. Seven soil drums did not contain
soil with detectable concentrations of the contaminants for which they were analyzed or
metals are concentrations that would constitute a waste. At the request of the owner of the
property from which the soil cuttings were generated (NRG Energy), the soil from the
seven drums will be removed from the drums and spread and be spread on the property
from which they were generated.
6. FINDINGS
The following summarizes the findings of the soil sample analytical results:
• TPH-e was detected in soil samples collected from B-6 from 6 to 7 feet below ground sur-
face (bgs), B-7 at 36 feet bgs, and B-20 from 5 to 6.5 feet bgs at concentrations of 6.4, 230,
and 460 milligrams per kilogram, respectively. TPH-e was not detected in the remaining soil
samples analyzed.
• The OCPs endosulfan I, endosulfan II, and 4,4-dichlorodiphenyltrichloroethene (i.e., DDT),
were detected in the soil sample collected from B-6 at a depth of 16-17.5 feet bgs at
concentrations of 25, 12, and 13 micrograms per kilogram, respectively; however, OCPs
were not detected in the soil samples collected from this boring at depths of 11.5-13 and
20.5 to 22 feet bgs. OCPs were not detected in the remaining soil samples analyzed.
• Metals were detected in the samples analyzed; however, the concentrations were below state
and federal waste criteria and the Regional Water Quality Control Board’s (RWQCBs) Tier 1
Soil Screening Levels (RWQCB, undated).
• VOCs, SVOCs, and PCBs were not detected in the soil samples analyzed.
• The pH in the soil samples analyzed ranged from 6.29 to 8.60.
The soil sample analytical results are summarized on Figures 4 and 5 and Table 1. Copies of the
soil sample laboratory analytical results are included in Appendix B.
The following summarizes the findings of the groundwater grab sample analytical results:
• TPH-e was detected in the groundwater grab samples collected from B-14 and B-18 at con-
centrations of 1,800 and 1,300 micrograms per liter (µg/λ), respectively. TPH-e was not
detected in the remaining groundwater samples analyzed.
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• The VOCs 1,2,4-trimethylbenzene and 1,3,5-trimethylbenzene were detected in the ground-
water grab sample collected from B-18 at concentrations of 1.3 and 1.7 µg/λ, respectively.
VOCs were not detected in the remaining samples analyzed.
• Metals were detected in the groundwater samples analyzed from borings B-9 and B-22 at the
concentrations indicated on Table 2.
• SVOCs, PCBs, and OCPs were not detected in the groundwater samples analyzed.
• The pH in the groundwater samples analyzed ranged from 6.74 to 7.64.
The groundwater grab sample analytical results are summarized on Figures 4 and 5 and Table 2.
Copies of the groundwater grab sample laboratory analytical results are included in Appendix B.
VOCs and fuel oxygenates were not detected in the trip blank samples analyzed.
7. CONCLUSIONS
Based upon the objectives of the environmental soil sampling and the findings presented above,
Ninyo & Moore provides the following conclusions:
• Based on the environmental soil sample analytical results obtained during this evaluation, there
is the potential for contaminated soil to be encountered during excavation activities in portions
of the pipeline alignment evaluated for this assessment, as described below (Figures 4 and 5):
{ TPH-e was detected in the soil samples collected from B-6 at 6 to 7 feet bgs and pesti-
cides were detected in the soil sample collected at a depth of 16 to 17.5 feet bgs;
however, TPH-e and pesticides were not detected in the soil samples collected in this
boring at a depth of 11.5-13 or 20.5-22 feet bgs. Therefore, in the soil in the vicinity of
B-6 there is the potential to encounter petroleum hydrocarbon impacted soil in the top
11.5 feet and pesticide impacted soil from 13 to 20.5 feet bgs.
{ TPH-e was detected in the soil sample collected from B-7 at a depth of 36 feet bgs;
however, TPH-e was not detected in the soil samples collected at depths of 31.0 feet or
shallower and samples were not collected/analyzed at depths greater than 36 feet bgs.
Therefore, there is the potential to encounter petroleum hydrocarbon impacted soil at
depths greater than 31 feet bgs in the vicinity of B-7.
{ TPH-e was detected in the soil sample collected from B-20 at a depth of 5-6.5 feet bgs;
however, TPH-e was not detected in the soil sample collected in this boring at a depth
of 10-11.5 feet bgs or deeper. Therefore, there is the potential to encounter petroleum
hydrocarbon impacted soil in the top 10 feet of soil in the vicinity of B-20.
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• Based on the environmental groundwater grab sample analytical results obtained during this
evaluation, there is the potential for contaminated groundwater to be encountered during ex-
cavation and/or dewatering activities in portions of the pipeline alignment evaluated for this
assessment as described below (Figures 4 and 5):
{ TPH-e was detected in the groundwater grab samples collected from B-14 and B-18;
therefore, there is the potential to encounter petroleum hydrocarbon impacted ground-
water in the vicinity of B-14 and B-18.
{ VOCs were detected in the groundwater grab sample collected from B-18; therefore,
there is the potential to encounter VOC impacted groundwater in the vicinity of B-18.
{ Metals were detected in the groundwater samples analyzed from borings B-9 and B-22.
If dewatering activities are proposed to be conducted and the extracted groundwater is
proposed to be discharged to surface waters or the sewer system, the concentrations of
metals in the extracted groundwater should meet with the requirements provided in the
permit from either the RWQCB or the City of Carlsbad.
8. RECOMMENDATIONS
The recommendations pertaining to the environmental aspect of the project are based on the re-
sults of the analytical testing of soil samples collected from B-6, B-7, and B-20 and groundwater
grab samples collected from B-14 and B-18, and the conclusions stated herein. Based on the
conclusions stated above, Ninyo & Moore recommends:
• A site-specific HASP should be prepared for subsurface activities in the vicinity of B-6 and
B-20. The HASP should also include subsurface activities in the vicinity of B-7, if the sub-
surface activities extend beyond 30 feet bgs in that area, and in the vicinity of B-14 and
B-18, if groundwater is anticipated to be encountered in those areas.
{ The HASP should be prepared in accordance with the requirements of Occupational
Safety and Health Administration (OSHA) standards and regulations contained in Ti-
tle 29, Code of Federal Regulations (CFR), Parts 1200, 1910, and 1926, including
amendments as stated in Federal Register December 19, 1986: 45654-45675 (Interim
Final Rule, 29 CFR 1910.120 “Hazardous Waste Operations and Emergency Re-
sponse”). In addition, the HASP should comply with California OSHA requirements for
hazardous waste operations and emergency response regulations contained in Title 8,
California Code of Regulations, Section 5144 and 5192.
{ The HASP should be reviewed and signed by a Certified Industrial Hygienist and in-
clude a community health and safety component.
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{ Anyone performing subsurface work in these areas should be alerted to the potential for
encountering petroleum hydrocarbons and/or pesticides in soil and petroleum hydrocar-
bons and/or VOCs in groundwater and have received the appropriate training in
accordance with the HASP.
• A soil management plan (SMP) should be prepared for subsurface activities in the vicinity of
B-6 and B-20 and should also include the areas in the vicinity of B-7, if the subsurface ac-
tivities extend beyond 30 feet bgs in that area, and in the vicinity of B-14 and B-18 if
groundwater is anticipated to be encountered in those areas. If dewatering activities are to be
performed during construction, the SMP should include a groundwater management compo-
nent for dewatering activities (i.e., soil and groundwater management plan [SGMP]).
{ The objective of the SMP/SGMP is to assist the contractor in the excavation, notifica-
tion, monitoring, segregation, characterization, handling, and reuse and/or disposal (as
appropriate) of wastes that may be encountered during earthwork and/or dewatering ac-
tivities. The SMP/SGMP should be prepared by a professional environmental consultant
and in accordance with the County of San Diego Department of Environmental Health’s
Site Assessment and Mitigation Manual, RWQCB guidelines, and the standard of care
of the industry.
• If dewatering activities are proposed to be conducted and the extracted groundwater is pro-
posed to be discharged to surface waters or the sewer system, the concentrations of metals in
the extracted groundwater should meet with the requirements provided in the permit from ei-
ther the RWQCB (General Waste Discharge Requirements and National Pollutant Discharge
Elimination System Permit for discharges from groundwater extraction waste to surface wa-
ters within the San Diego Region except for San Diego Bay, Order No. R9-2008-0002,
NPDES No. CAG919002) or the City of Carlsbad.
9. LIMITATIONS
The environmental services described in this report have been conducted in general accordance
with current regulatory guidelines and the standard-of-care exercised by environmental consult-
ants performing similar work in the project area. No warranty, expressed or implied, is made
regarding the professional opinions presented in this report. Variations in site conditions may ex-
ist and conditions not observed or described in this report may be encountered during subsequent
activities. Please also note that this study did not include an evaluation of geotechnical condi-
tions or potential geologic hazards.
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Ninyo & Moore's opinions and recommendations regarding environmental conditions, as presented
in this report, are based on the soil and groundwater grab sample chemical analysis. Further as-
sessment of potential adverse environmental impacts from past on-site and/or nearby use of
hazardous materials may be accomplished by a more comprehensive assessment. The samples col-
lected and used for testing, and the observations made are believed to be representative of the
area(s) evaluated; however, conditions can vary significantly between sampling locations. Varia-
tions in groundwater conditions will exist beyond the borings sampled in this evaluation.
The environmental interpretations and opinions contained in this report are based on the results
of laboratory tests and analyses intended to detect the presence and concentration of specific
chemical or physical constituents in samples collected from the subject site. The testing and
analyses have been conducted by an independent laboratory that is certified by the State of Cali-
fornia to conduct such tests. Ninyo & Moore has no involvement in, or control over, such testing
and analysis. Ninyo & Moore, therefore, disclaims responsibility for any inaccuracy in such
laboratory results.
Our conclusions, recommendations, and opinions are based on an analysis of the observed site
conditions. It should be understood that the conditions of a site could change with time as a result
of natural processes or the activities of man at the subject site or nearby sites. In addition,
changes to the applicable laws, regulations, codes, and standards of practice may occur due to
government action or the broadening of knowledge. The findings of this report may, therefore, be
invalidated over time, in part or in whole, by changes over which Ninyo & Moore has no control.
This document is intended to be used only in its entirety. No portion of the document, by itself, is
designed to completely represent any aspect of the project described herein. Ninyo & Moore
should be contacted if the reader requires any additional information, or has questions regarding
content, interpretations presented, or completeness of this document.
This report is intended exclusively for use by the client. Any use or reuse of the findings, conclu-
sions, and/or recommendations of this report by parties other than the client is undertaken at said
parties’ sole risk.
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10. REFERENCES
California Regional Water Quality Control Board, San Diego Region, 1994, Water Quality Con-
trol Plan for the San Diego Basin (9): dated September 8, amendments adopted through
February 8, 2006.
California Regional Water Quality Control Board, San Diego Region, undated, Conditional
Waiver No. 8, Discharges/Disposal of Solid Waste to Land: undated.
County of San Diego Department of Environmental Health, 2004, Site Assessment and Mitiga-
tion Manual, San Diego, California, Site Assessment and Mitigation Division.
Ninyo & Moore, 2009, Geotechnical Evaluation, Agua Hedionda Lift Station and Force Main,
Carlsbad, California: dated August 3.
Agua Hedionda Lift Station and Force MainCarlsbad, CaliforniaSeptember 25, 2009Project No. 106044003Sample IDDate CollectedDepth (feet bgs)TPH C6-C44 (mg/kg) VOCs (µg/kg)SVOCs (mg/kg)PCBs (µg/kg)pHB-6 6-7' 6/22/2009 6-76.4ND -- -- --B-6 11.5-13' 6/22/2009 11.5-13 ND ND -- -- --Barium - 38.6Beryllium - 0.478Chromium -10.3Cobalt - 6.29Endosulfan I - 25Copper - 3.73Endosulfan II - 12Lead - 0.5734.4'-DDT - 13Nickel - 3.41Vanadium - 29.7Zinc - 13.1B-6 20.5-22' 6/22/2009 20.5-22NDND-- -- --B-6 26.3-27.3' 6/22/2009 26.3-27.3NDND-- -- --B-6 30.9-31.8' 6/22/2009 30.9-31.8NDND-- -- --B-6 35.5-36.0' 6/22/2009 35.5-36.0NDND-- -- --B-7-6.5 6/25/2009 6.5NDND-- -- --B-7-11.5 6/25/2009 11.5NDND-- -- --B-7-16.5 6/25/2009 16.5NDND-- -- --B-7-20.5 6/25/2009 20.5NDND-- -- --B-7-26 6/25/2009 26.0NDND-- -- --Barium - 356Beryllium - 1.110Chromium -9.17Cobalt - 3.37Copper - 5.6Lead - 1.45Nickel - 5.45Vanadium - 30.3Zinc - 33.1B-7-36 6/25/2009 36.0230ND-- -- ---- ----ND--------Detected Pesticides (µg/kg)NDND------Detected Title 22 Metals (mg/kg)B-7-31 6/25/2009 31.0 ND6/22/2009B-6 16-17.5'------------------16-17.5Table 1 - Soil Sample Analytical Results--7.73ND------7.98NDND NDND--106044003 T.xls1 of 4
Agua Hedionda Lift Station and Force MainCarlsbad, CaliforniaSeptember 25, 2009Project No. 106044003Sample IDDate CollectedDepth (feet bgs)TPH C6-C44 (mg/kg) VOCs (µg/kg)SVOCs (mg/kg)PCBs (µg/kg)pHDetected Pesticides (µg/kg)Detected Title 22 Metals (mg/kg)Table 1 - Soil Sample Analytical ResultsBarium - 18.2Chromium -6.97Cobalt - 4.06Copper - 0.959Lead - 1.46Nickel - 2.22Vanadium - 27.6Zinc - 6.83B-8-11.5 6/26/2009 11.5NDND-- -- --B-8-16.5 6/26/2009 16.5NDND-- -- --B-8-21 6/26/2009 21.0NDND-- -- --B-8-25.5 6/26/2009 25.5NDND-- -- --B-8-30.5 6/26/2009 30.5NDND-- -- --B-8-35.5 6/26/2009 35.5NDND-- -- --B-9-6.5 6/29/2009 6.5NDND-- -- --B-9-11.5 6/29/2009 11.5NDND-- -- --B-9-16.5 6/29/2009 16.5NDND-- -- --B-9-20.5 6/29/2009 20.5NDND-- -- --Barium - 30.9Beryllium - 0.603Chromium -7.12Cobalt - 2.43Copper - 4.7Lead - 2.85Mercury - 0.382Nickel - 3.22Vanadium - 9.49Zinc - 19.8B-9-30.5 6/29/2009 30.5NDND-- -- --B-10-6.5 6/29/2009 6.5NDND-- -- --B-10-11.5 6/29/2009 11.5NDND-- -- --B-10-16.5 6/29/2009 16.5NDND-- -- --8.47------NDB-9-25.5 6/29/2009 25.5 ND-- ---- ------ --NDND NDB-8-6.5 6/26/2009 6.5 ND--ND ND---- ---- -------- --ND-- ---- ---- --6.29ND-- --106044003 T.xls2 of 4
Agua Hedionda Lift Station and Force MainCarlsbad, CaliforniaSeptember 25, 2009Project No. 106044003Sample IDDate CollectedDepth (feet bgs)TPH C6-C44 (mg/kg) VOCs (µg/kg)SVOCs (mg/kg)PCBs (µg/kg)pHDetected Pesticides (µg/kg)Detected Title 22 Metals (mg/kg)Table 1 - Soil Sample Analytical ResultsBarium - 23.0Beryllium - 0.595Chromium -4.95Cobalt - 1.86Copper - 2.37Lead - 0.755Nickel - 2.32Vanadium - 9.90Zinc - 17.0B-10-25.5 6/29/2009 25.5NDND-- -- --B-10-31 6/29/2009 31.0NDND-- -- --B-10-36 6/29/2009 36.0NDND-- -- --Barium - 18.6Chromium -6.47Cobalt - 3.56Copper - 9.41Lead - 1.36Nickel - 1.89Vanadium - 26.3Zinc - 12.70B-12 10-11.5' 11/12/2008 10-11.5NDND-- -- --B-12 15-16.5' 11/12/2008 15-16.5NDND-- -- --Barium - 10.4Chromium -5.83Cobalt - 2.78Copper - 4.18Lead - 1.41Nickel - 1.31Vanadium - 19.2Zinc - 6.34B-16 10-11.5' 11/7/2008 10-11.5NDND-- -- --B-16 15-16.5' 11/7/2008 15-16.5NDND-- -- --ND6.78-- ---- --ND ND ND NDB-12 5-6.5' 11/12/2008 5-6.5 ND----6.49ND-- --ND ND NDNDB-16 5-6.5 11/7/2008 5-6.5ND21.06/29/2009B-10-218.36NDND--------ND----106044003 T.xls3 of 4
Agua Hedionda Lift Station and Force MainCarlsbad, CaliforniaSeptember 25, 2009Project No. 106044003Sample IDDate CollectedDepth (feet bgs)TPH C6-C44 (mg/kg) VOCs (µg/kg)SVOCs (mg/kg)PCBs (µg/kg)pHDetected Pesticides (µg/kg)Detected Title 22 Metals (mg/kg)Table 1 - Soil Sample Analytical ResultsB-20 5-6.5' 11/9/2008 5-6.5 460ND-- -- --Barium - 9.79Chromium - 4.56Cobalt - 1.78Copper - 8.25Lead - 1.38Nickel - 2.00Vanadium - 13.2Zinc - 10.8B-20 15-16.5' 11/9/2008 15-16.5NDND-- -- --B-20 20-21.5' 11/9/2008 20-21.5NDND-- -- --B-20 25-26.5' 11/9/2008 25-26.5NDND-- -- --B-20 30-31.5' 11/9/2008 30-31.5NDND-- -- --B-20 35-36.5' 11/9/2008 35-36.5NDND-- -- --B-20 40-41.5' 11/9/2008 40-41.5NDND-- -- --B-22 5-6.5' 11/5/2008 5-6.5NDND-- -- --B-22 10-11.5' 11/5/2008 10-11.5NDND-- -- --Arsenic 0.8Barium - 39.200Beryllium - 0.264Chromium -7.59Cobalt - 3.31Copper - 13.70Lead - 2.36Nickel - 3.49Vanadium - 19.60Zinc - 31.6Notes:bgs - below ground surface SVOCs - semi-volatile organic compoundsmg/kg - milligrams per kilogram TPH - total petroleum hydrocarbonsµg/kg - micrograms per kilogram VOCs - volatile organic compoundsDDT - dichlorodiphenyltrichloroethane -- Not analyzedPCBs - polychlorinated biphenylsND 8.60-- ---- ---- ---- ------ ---- --ND ND ND-- --B-20 10-11.5 11/9/2008 10-11.5 NDND ND 7.75---- --B-22 15-16.5' 11/5/2008 15-16.5 ND ND ND106044003 T.xls4 of 4
Agua Hedionda Lift Station and Force MainCarlsbad, CaliforniaSeptember 25, 2009Project No. 106044003Sample IDDate CollectedTPH C6-C40 (µg/l) SVOCs (µg/l)Pesticides (µg/l)PCBs (µg/l)pHBarium - 0.341Beryllium - 0.00147Chromium -0.0956Cobalt - 0.0192Copper - 0.17Lead - 0.0344Molybdenum - 0.0309Nickel - 0.0298Vanadium - 0.0876Zinc - 0.228B-12-GW11/12/2008 ND -- -- -- --B-14-GW11/7/2008 1,800 -- -- -- --B-17-GW11/7/2008 ND -- -- -- --1,2,4-Trimethylbenzene - 1.31,3,5-Trimethylbenzene - 1.7Arsenic - 0.102Barium - 1.85Beryllium - 0.0241Cadmium - 0.00674Chromium -0.289Cobalt - 0.142Copper - 0.226Lead - 0.174Mercury - 0.000916Nickel - 0.180Selenium - 0.0285Vanadium - 0.557Zinc - 0.592Notes:mg/l - milligrams per literTPH - total petroleum hydrocarbonsµg/l - micrograms per literVOCs - volatile organic compoundsPCBs - polychlorinated biphenyls -- - Not analyzedSVOCs - semi-volatile organic compoundsND------ NDNDNDNDNDB-18-GW 11/9/2008 1,300-- VOCs (µg/l)ND 6.74ND NDNDNDND ND --B-22-GW 11/5/2008 NDTable 2 - Groundwater Grab Sample Analytical ResultsND6/29/2009B-9-GW7.64NDDetected Title 22 Metals (mg/l)106044003 T.xls1 of 1
PROJECT NO.
NOTE: ALL DIMENSIONS, DIRECTIONS AND LOCATIONS ARE APPROXIMATE.
REFERENCE: 2005 THOMAS GUIDE FOR SAN DIEGO COUNTY, STREET GUIDE AND DIRECTORY.
AGUA HEDIONDA LIFT STATION AND FORCE MAIN
CARLSBAD, CALIFORNIA
SITE LOCATION MAP
1
106044003fig1 106044003 slm DATE
FIGURE
9/09
APPROXIMATE SCALE IN FEET
480024000
SITESITE
N
Agua Hedionda Lift Station and Force Main September 25, 2009
Carlsbad, California Project No. 106044003
106044003 R.doc
APPENDIX A
FIELD SAMPLING PROCEDURES AND BORING LOGS
Field Procedure for the Collection of Disturbed Samples
Disturbed soil samples were obtained in the field using the following methods.
Bulk Samples
Bulk samples of representative earth materials were obtained from the exploratory excava-
tions. The samples were bagged and transported to the laboratory for testing.
Field Procedure for the Collection of Relatively Undisturbed Samples
Relatively undisturbed soil samples were obtained in the field using the following methods.
The Modified Split-Barrel Drive Sampler
The sampler, with an external diameter of 3.0 inches, was lined with 1-inch long, thin brass
rings with inside diameters of approximately 2.4 inches. The sample barrel was driven into
the ground with the weight of a hammer in general accordance with American Society for
Testing and Materials Test Method D 3550-01. The driving weight was permitted to fall
freely. The approximate length of the fall, the weight of the hammer, and the number of
blows per foot of driving are presented on the boring logs as an index to the relative resis-
tance of the materials sampled. The samples were removed from the sample barrel in the
brass rings, sealed, and transported to the laboratory for testing.
Agua Hedionda Lift Station and Force Main September 25, 2009
Carlsbad, California Project No. 106044003
106044003 R.doc
APPENDIX B
ANALYTICAL LABORATORY REPORTS