HomeMy WebLinkAboutSoil Sample 2-9-16February 9,2016
Mr. Mike Wannes
Hungry’s Market
3711 Mount Vernon Avenue
Bakersfield, California 93306
PRELIMINARY SITE ASSESSMENT REPORT FORHUNGRY’S MARKET
3711 MOUNT VERNON AVENUE, BAKERSFIELD, CALIFORNIA
(BFDPSD PERMIT NO. 15-10000661)
Dear Mr. Wannes:
VVEIR Corp is pleased to present the following PreliminarySiteAssessment Report(PSAR)for the
assessmentactivities being performed at the Hungry’s Market(site). On October 28, 2015, the
10,000-gallon, premium grade gasoline, single-walled fiberglass underground storage tank (UST), which
is equipped with U-tube type secondary containment, failed an integrity test. Subsequently repairs were
performed on the UST and the tank passed a retest. The Bakersfield Fire Department Prevention
ServicesDepartment (BFDPSD)requested that soil samples be collected beneath the invert of the UST
under the location where the repairs were performed in order to assess whether a petroleum release has
impacted the subsurface beneath the UST.
SITE DESCRIPTION
The site is located at 3711 Mount Vernon Avenue, Bakersfield, Kern County, California(see Figure 1 –
Site Location Map). The site is located within the commercial district that flanks Mount Vernon Avenue.
The site is identified as Kern County Assessor’sParcel Number 382-020-01.The site is at an elevation of
700 feet above mean sea level, and the topography is relatively flat with a slight slope to the south, toward
the ancient Kern Lake bed. The site is located within thenorthwest quarter of Section15, Township 29
South, Range 28 East, Mount Diablo Baseline and Meridian. Located at the site are three 10,000-gallon
USTs,two multiple product dispensers on single island, and associated product and vapor recovery piping
(see Figure 2 –Plot Plan). The USTs are used to storegasoline and diesel fuels.
The sitecontact is Mr. Mike Wannes, Hungry’s Market, 3711 Mount Vernon Avenue, Bakersfield,
California, 93307,(661) 722-4000. The environmental consultant is Mr. Mark R. Magargee, PG, CHg,
VEIR Corp,3410 Fruitvale Avenue, Suite A, Bakersfield, California, 93308, (661) 631-8347.
The Bakersfield Fire Department Prevention Services Departmentcontact is Mr. Kris Karnes, Bakersfield
Fire Department Office of Environmental Services, 1600 Truxtun Avenue, Suite 401, Bakersfield,
California 93301, (661) 326-3979.
Mr. Mike Wannes
Hungry’s Market
February 9, 2016-Page 2
BACKGROUND
TOPOGRAPHY
The site is located at an elevation of 700 feet above MSL, and the topography slopes slightly to the
southwesttoward the ancient Kern Lake bed. The subject site is located within the San Joaquin Valley,
approximately 15 miles west of the Sierra Nevada, 30 miles east of the Temblor Range, and 30 miles
north of the San Egmidio Range.
GEOLOGY
The subject site is located on the eastern flank of the San Joaquin Valley and west of the southern
SierraNevada. The surface of the San Joaquin Valley is composed primarily of unconsolidated
Pleistocene (1.6 million to 11,000 years ago) and Recent (11,000 years ago to the present) alluvial
sediments. Beneath the alluvial sediments are older, predominantly lake-bed deposits. These lie
unconformably on Mio-Pliocene marine sediments, which extend to a crystalline basement at a depth of
approximately 50,000 fbg. At the subject site, surface deposits consist of Quaternary (recent)
unconsolidated alluvium overlying Quaternary (Pleistocene) nonmarine sediments. Geologic deposits in
the study area include Pleistocene alluvial sediments that form a homocline dipping gently to the
southwest. The deposits are alluvium consisting of indurated and dissected fan deposits
(CaliforniaDivision of Mines and Geology, 1965, Geologic Map of California, Bakersfield Sheet).
Thealluvium consists of coarse-grained sandsand gravels, with intervals of finer grained, sandy silts and
minor development of clayoverbank deposits. Surface soils are classified by the Soils Conservation
Services as Cajon sandy loam with high permeability.
HYDROGEOLOGY
The site is located in the southern portion of the Great Valley geomorphic province. The Great Valley is a
north-south-trending valley, approximately 400 miles long by 50 miles wide, the southern portion of which
is known as the San Joaquin Valley. Surface water and groundwater in the San Joaquin Valley are
derived predominantly from the Sierra Nevada to the east and are transported by five major rivers, the
closest to the site being the Kern River. The subject site is located approximately one milesouth of the
Kern River. The depth to the regional, unconfined aquifer is in excess of 300 fbg, and the groundwater
gradient is to the southwest. There are several municipal water supply wells located within a mile of the
site. The groundwater is considered to be potable and suitable for beneficial use. None of the municipal
wells are located within a 1,000-foot radius of the site.
Mr. Mike Wannes
Hungry’s Market
February 9, 2016-Page 3
PRELIMINARYSITE ASSESSMENT
The intent of thesite assessment wastoevaluate whether petroleum hydrocarbons were released from
the premium grade UST byslant drillingasoil boringfrom a surface location north end of theUST to a
bottomhole location beneath the invert of the UST under the location where the repairs were performed
(see Figure 2for the soil boringlocation).Prior to any intrusive methods being conducted atthe site,
UndergroundService Alert wasutilized to map out the underground structures. Based on the clearances
obtained, VVEIR Corp sitedthe soil boringina safe location.
On January 19, 2016,VEIR Corp drilledsoil boringB-1using a Mobile B-53™ hollow-stem auger dri ll
rig. The surface location was six feet to the north of the premium grade UST and the boring was slant
drilled for 30 linear feet at 22.5 degree to the south to a bottom hole location beneath the invert at north
end of the UST where the repairs had been performed (see Figure 2). During the drilling process, soil
cuttings, as well as each soil sample, wasfield-screened for volatile organic compounds (VOCs) using a
photoionization detector (PID) calibrated to 100 ppmv isobutylene, and observations will be made for the
visual identification of any soil staining or discoloration(see Attachment 1 for the Soil Boring and Sampling
Procedures). Soils wereclassified according to the Unified Soil Classification System by an experienced
environmental geologist under the direct supervision of a State of California professional geologist, and all
data wasrecorded ona log of exploratory boring(see Attachment 2 for the Log of Exploratory Boring).
Soil samples were stored in stainless steelsleeves, which werewrapped in Teflon®, followed by
close-fitting plastic caps, and held at a temperature of 4°C while in the field andin transit to the laboratory.
Undisturbed soil samples were collected at 5-foot intervals, and selected soil samples were analyzed for
TPHas gasoline using EPA Method 8015M and BTEX,MTBE,TBA, DIPE, ETBE, TAME, EDB, and
1,2-DCAusing EPA Method 8260B.Soilsencountered during drilling included well gradedsands and
gravel with cobbles up to eight inches in diameter.Groundwater was notencountered while drilling.
TPHas gasoline,BTEX,MTBE,TBA, DIPE, ETBE, TAME, EDB, and1,2-DCA werenotdetected in the
soil samples collected from thesoil boring, which collaborated the field screening performed during the
drilling and soil sampling(see Table 1 –Summary of Soil Sample Analytical Results and Attachment 3for
the Laboratory Report).
CONCLUSSIONS AND RECOMMENDATIONS
Based upon the results of thepreliminarysite assessment petroleum hydrocarbons were not detected in
the soil samples collected from beneath the northern end of the premium grade UST.VEIR Corp
recommends that the BFDPSD issue a no further action determination in association with the repairs
made to the premium grade UST.
LEGEND
FIGURE 1 - SITE LOCATION MAP
MIKE WANNES
HUNGRY’S MARKET
3177 MOUNT VERNON AVENUE
BAKERSFIELD, CALIFORNIA
VEIR Corp
SITE
LOCATION
FIGURE 2 - PLOT PLAN
LEGEND MIKE WANNES
HUNGRY’S MARKET
3711 MOUNT VERNON AVENUE
BAKERSFIELD, CALIFORNIA
VEIR Corp
10,000-GALLON USTS
0 7.515
1 inch = 15 ft.
( IN FEET )
DISPENSERS
HUNGRY’S MARKET
SOIL BORING LOCATION
B-1
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ATTACHMENT 1.
SOIL BORING AND SAMPLINGPROCEDURES
REVISED 1/1/10
VEIR CORP’S STANDARD OPERATING PROCEDURES FOR
SOIL BORING AND SAMPLING PROCEDURES
PRE-DRILLING PROTOCOL
Prior to the start of drilling, necessary permits, site access agreements, and/or encroachment permits are
obtained. "As-built" drawings are obtained if possible. At least 48 hours prior to drilling, Underground
Service Alert or an equivalent utility notification service is notified. A geophysical survey may be
conducted to locate subsurface utilities. Site plans and/or "as-built" drawings are compared to actual
conditions observed at the site. The property owner/retailer is interviewed to gain information about
locations of former UST systems (including dispensers, product lines, and vent lines). A visual inspection
is made of the locations of the existing UST system, and scars and patches in pavement are noted.
The emergency shut-off switch is located for safety purposes. The critical zone, which is defined as
10 feet from any part of the UST system, is identified, and any proposed drilling locations within the
critical zone may be subject to special hole clearance techniques. Drilling locations within the critical zone
are avoided if possible. Notifications are made at least 2 weeks in advance of drilling to the property
owner, client representative, on-site facility manager, regulatory agency, and/or other appropriate parties.
A site-specific, worker health and safety plan for the site is available on site at all times during drilling
activities. Prior to commencing drilling, a health and safety meeting is held among all on-site personnel
involved in the drilling operation, including subcontractors and visitors, and is documented with a health
and safety meeting sign-in form. A traffic control plan is developed prior to the start of any drilling
activities for both on-site and off-site drilling operations. The emergency shut-off switch for the service
station is located prior to the start of the drilling activities. A fire extinguisher and "No Smoking" signs
(and Proposition 65 signs in California) are present at the site prior to the start of the drilling activities.
The first drilling location is the one located furthest from any suspected underground improvements in
order to determine the natural subsurface conditions, to be able to better recognize fill conditions, and to
prevent cross contamination. For monitoring wells, a 2 x 2-foot square or 2-foot diameter circle is the
minimum removal. For soil borings and push-type samplers, the minimum pavement removal is 8-inches.
When pea gravel, sand, or other non-indigenous material is encountered, the drilling location will be
abandoned unless the absence of subsurface facilities can be demonstrated and client approval to
proceed is obtained. If hole clearance activities are conducted prior to the actual day of drilling, the
clearance holes are covered with plates and/or backfilled.
The minimum hole clearance depths are 4 feet below grade (fbg) outside the critical zone and 8 fbg within
the critical zone and are conducted as follows:
VEIR Corp’s Standard Operating Procedures for
Soil Boring and Sampling Procedures
Page 2
REVISED 1/1/10
• 0 to 4 fbg: The area to be cleared exceeds the diameter of the largest tool to be advanced and is
sufficiently large enough to allow for visual inspection of any obstructions encountered. The first 1 to
2 feet is delineated by hand digging to remove the soil, then the delineated area is probed to ensure
that no obstructions exist anywhere near the potential path of the drill auger or push-type sampler.
Probing is extended laterally as far as possible. Hand augering or post-hole digging then proceeds,
but only to the depth that has been probed. If subsurface characteristics prohibit effective probing, a
hand auger is carefully advanced past the point of probing. In this case, sufficient hand augering or
post-hole digging is performed to remove all the soil in the area to be delineated. For soil borings
located outside of the critical zone, an attempt should be made to probe an additional 4 feet.
• 4 to 8 fbg: For the soil borings located inside the critical zone, probing and hand clearing an
additional 4 feet is performed. If probing is met with refusal, then trained personnel advance a hand
auger without excessive force.
An alternate or additional subsurface clearance procedures may also be employed, as required by
clients, permit conditions, and/or anticipated subsurface conditions (for example, near major utility
corridors or in hard soils). Alternate clearance techniques may include performing a geophysical
investigation or using an air knife or water knife. If subsurface conditions prevent adequate subsurface
clearance, the drilling operation is ceased until the client approves a procedure for proceeding in writing.
If any portion of the UST system is encountered, or if there is any possibility that it has been encountered,
the work ceases, and the client is notified immediately. If there is reason to believe that the product
system has been damaged, the emergency shut-off switch is activated. The client will decide if additional
uncovering by hand is required. If it is confirmed that the UST system has been encountered, tightness
tests are performed. The hole is backfilled only with client approval.
DRILLING AND SOIL SAMPLING PROCEDURES
Soil boring are drilled using one of the following methods:
x Manual drilling: Manual drilling utilizes a 2-inch-OD, hand auger manufactured by
Xitech Industries, Art’s Manufacturing Company, or similar equipment. Soil samples are
collected with a drive sampler, which is outfitted with 1.5-inch by 3-inch steel or brasssleeves.
The specific equipment used is noted on a soil boring log.
x Truck-mounted, powered drilling: Truck-mounted, powered drilling utilizes hollow-stem flight
auger drilling, air rotary drilling, or percussion hammer drilling, or similar technologies. Soil
samples are collected in steel or brasssleeves with a California-modified, split-spoon sampler or,
for specific projects, a continuous sampler. The specific equipment used is noted on a soil boring
log.
VEIR Corp’s Standard Operating Procedures for
Soil Boring and Sampling Procedures
Page 3
REVISED 1/1/10
x Direct push sampling: Direct push sampling utilizes Geoprobes®, cone penetrometer testing
rigs, or similar technologies. Soil samples are collected with a drive sampler, which is outfitted
with steel or brasssleeves. The specific equipment used is noted on a soil boring log.
Before each soil sampling episode, the sampling equipment is decontaminated using a non-phosphate
soap wash, a tap-water rinse, and a deionized water rinse. The drill string is decontaminated with a steam
cleaner between each soil boring (truck-mounted rigs).
Soil samples that are collected in steel or brasssleeves are covered with aluminum foil or Teflon™ tape
followed by plastic caps. If EPA Method 5035 is required, then 5 to 20 grams of soil is extracted from the
sample and placed in methanol-preserved containers supplied by the laboratory, or sub samples are
collected using Encore® samplers. During the drilling process, soil samples and cuttings are field
screened for VOCs using a photoionization detector calibrated to 100 parts per million by volume
isobutylene. Any soil staining or discoloration is visually identified. Soils are classified according to the
Unified Soil Classification System. Specific geologic and hydrogeologic information collected includes
grading, plasticity, density, stiffness, mineral composition, moisture content, soil structure, grain size,
degree of rounding, and other features that could affect contaminant transport. All data is recorded on a
soil boring log under the supervision of a geologist registered in the state in which the site is located. The
samples are labeled, sealed, recorded on a chain-of-custody record, and chilled to 4°C in accordance
with the procedures outlined in the California State Water Resources Control Board’s Leaking
Underground Fuel Tank Field Manual and the Arizona Department of Environmental Quality’s Leaking
Underground Storage Tank Site Characterization Manual. Sample preservation, handling, and
transportation procedures are consistent with VEIR Corp’s quality assurance/quality control
procedures. The samples are transported in a chilled container to a state-certified, hazardous waste
testing laboratory.
Cuttings from the soil borings are stored in 55-gallon, Department of Transportation (DOT)-approved
drums, roll-off bins, or other appropriate containers, as approved by the client. Each container is labeled
with the number of the soil boring(s) from which the waste was derived, the date the waste was
generated, and other pertinent information. The drums are stored at the site of generation until sample
laboratory analytical results are obtained, at which time the soil is disposed of appropriately.
A soil boring log is completed for each soil boring and includes the following minimum information:
• date of drilling;
• location of soil boring;
• project name and location;
• soil sample names and depths;
• soil descriptions and classifications;
• standard penetration counts (rigs);
VEIR Corp’s Standard Operating Procedures for
Soil Boring and Sampling Procedures
Page 4
REVISED 1/1/10
• photoionization detector readings;
• drilling equipment;
• soil boring diameter;
• sampling equipment;
• depth to groundwater in soil boring;
• name of person performing logging;
• name of supervising registered geologist; and
• name of drilling company (rigs and direct push).
SOIL BORING COMPLETION PROCEDURES
All soil borings are either properly abandoned or completed as a well.
Abandonment
Each soil boring that is not completed as a well is backfilled with bentonite grout, neat cement, concrete,
or bentonite chips with a permeability less than that of the surrounding soils, and/or soil cuttings,
depending on local regulatory requirements or client instructions. Grout is placed by the tremie method.
Backfilling is performed carefully to avoid bridging.The type of backfill material is noted on the soil boring
log.
Well Installation
Wells are designed according to applicable state and local regulations as well as project needs. Details
of the well design and construction are recorded on the soil boring log and include the following minimum
information (in addition to the items noted above for soil borings):
• detailed drawing of well;
• type of well (groundwater, vadose, or air sparging);
• casing diameter and material;
• screen slot size;
• well depth and screen length (±1 foot);
• filter pack material, size, and placement depths;
• annular seal material and placement depths;
• surface seal design/construction;
• well location (±5 feet); and
• well development procedures.
Groundwater monitoring wells are generally designed with 30 feet of slotted casing centered on the water
table, unless site conditions, project needs, or local regulations dictate a different well design. The sand
pack is placed at least two feet above the top of the screen, and at least 3 feet of low permeability seal
material is placed between the sand pack and the surface seal. The sand pack and low permeability seal
material are placed in the annular space from the bottom up using the tremie method. When drilling in
VEIR Corp’s Standard Operating Procedures for
Soil Boring and Sampling Procedures
Page 5
REVISED 1/1/10
asphalt, a 24-inch round cut is made for the well pad. When drilling on concrete, a 2 x 2-foot square is
sawcut. The well cover is traffic-rated and has a white lid with a black triangle painted on it (3 inches per
side) or a black lid with a white triangle (3 inches per side). The completed well pad should is concrete of
matching color with the existing surface. The well number is labeled on the outside of the well box/pad
and the inside of the well box. The number on the outside is painted on with a stencil, stamped, or
attached to the well with a metal plate. The number on the inside is written on the well cap with
waterproof ink. The casing has a notch or indication on its north side indicating a unique
measuring/surveying point.
Well development is conducted by simple pumping if bridging of the screen does not occur. If bridging
occurs, well surging is conducted for adequate well production. Well surging is created by the use of
surge blocks, bailers, or pumps, whichever method is most appropriate for the well use. Only formation
water is used for surging the well. Well development continues until non-turbid groundwater is produced
or turbidity stabilizes. All purged groundwater is held on site in covered 55-gallon DOT-approved drums
or other appropriate containers until water sample analytical results are received.
The elevation of the north side of the top of well casing (or other appropriate reference point from which
the depth to groundwater can be measured) is surveyed to an accuracy of ±0.01 foot. All measurements
are reproduced to assure validity. Surveying is performed by a state-licensed surveyor if required by
state or local regulations. In the State of California, wells are surveyed in accordance with AB2886.
DATA REDUCTION
The data compiled from the soil borings is summarized and analyzed. A narrative summary of the soil
characteristics is also presented. The soil boring logs are checked for the following information:
• correlation of stratigraphic units among borings;
• identification of zones of potentially high hydraulic conductivity;
• identification of the confining layer;
• indication of unusual/unpredicted geologic features (fault zones, fracture traces, facies changes,
solution channels, buried stream deposits, cross-cutting structures, pinchout zones, etc.); and
• continuity of petrographic features such as sorting, grain-size distribution, cementation, etc.
Soil boring/well locations are plotted on a properly scaled map. If appropriate, soil stratigraphy of the site
is presented in a scaled cross section. Specific features that may impact contaminant migration, e.g.,
fault zones or impermeable layers, are discussed in narrative form and supplemented with graphical
presentations as deemed appropriate.
ATTACHMENT 2.
LOG OF EXPLORATORYBORING
ATTACHMENT 3.
LABORATORY REPORT
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