File: 18G. D.B. ,-ir00037 TO 142150/EIELSON RIES CV030768.GO0 Copy ~oc D~ate 2L~jz 1 125 flic No. 4 {toEaf nc~sctc~i~t Ocu-'tk Ax S-fecteci S~rn. Filet3d tIII la1idatetd .. U.S. AIR FORCE INSTALLATION RESTORATION PROGRAM REMEDIAL INVESTIGATION/FEASIBILITY STUDY OF THE FUEL SATURATED AREA AT EIELSON AIR FORCE BASE, ALASKA DECISION DOCUMENT FOR SELECTED SITES HAZWRAP Support Contractor Office Oak Ridge, Tennessee 37831 operated by Martin Marietta Energy Systems, Inc. for the U.S. Department of Energy under contract DE-AC05-840R21400
AFB Air Force BaseAMSL Above Mean Sea LevelAltAR Applicable, Relevant and Appropriate RequirementAVGAS Aviation GasBLS Below Land SurfaceBNA Base/Neutral and Adid ExtractableCERCLA Comprehensive Environmental Response, Compensation and Uiability ActCLIP Contract Laboratory PrograDEQPPM Defense Environmental Quality Program Policy MemorandumDOD Department of DefenseHARM Hazard Assessment Rating MethodologyTRY Installation Restoration ProgramLS Land SurfaceMCL Maximum Contaminant LevelMOGAS Motor GasolineOD Outside DiameterPIDl Photoionization DetectorPOL Petroleum, Oil, and LubricantsQAV/QC Quality Assurance/Quality ControlRI/ES Remedial Investigation/Feasibility StudySDWA Safe Drinking Water Actsow Statement Of WorkTIC Tentatively Identified CompoundTOC Total Organic CarbonTOX Total Organic HalogensUSEPA U.S. Environmental Protection AgencyVOC Volatile Organic Compounds
vimi
1.0 DINRODUCflON
* ~The U.S ir oc a ogbe nae in a wide vreyof operations dealing xith
hazadou maerias. he eparmen ofDefense (DOD) has taken action to identify thelocations and contents of past disposal sites and to eliminate the hazards to public
Policy for the IRP is contained in Defense Environmental Quality Program PolicyMemorandum (DEQPPM) 81-5, dated December 11, 1981. The IRP is defined in DEQPPM81-5 as a four-phased program including problem identification (Phase I), confirmation(Phase 11), technology development (Phase III), and planning and implementation ofappropriate control measures (Phase MV. Phase IV is further divided into remedialaction planning (Phase NV-A) and remedial action implementation (Phase W-B).
* ~~Phase NV-A is comparable to the remedial investigation/feasibility study (RUEFS) stagedescribed in the National Oil and Hazar dous Materials Contingency Plan, promulgatedunder the Comprehensive Environmental Response, Compensation, and Liability, Act(CERCLA, or "Superfund"). Under this stage, sites that are suspected of posing actualor potential hazards to public health and/or the environment are evaluated on the basisof site-specific information. Hazards posed by the sites are defined in terms as specificas possiible, alternative measures of mitigating those hazards are evaluated, and one or acombination of mitigating measures is selected for implementation.
The conclusion of a RI/FS or Phase IV-A study of a hazardous waste site is a decisionthat the site either:
1) Poses no significant threat to human health or the environment and willreceive no additional consideration, or
2) The site poses a specific hazard or hazards and specific mitigating measureshave been selected for implementation.
aIn either case, the decision is documented in a Record of Decision or a DecisionUDocument that provides the technical basis for the future disposition of the site.
:1-i
1.2 PREVIOUS INSTALILAnON RESTORATION PROGRAM WORK AT ELELSON AIR
FORCE BASE
Previous investigations of potential areas of environmental contamination at Eielson AirForce Base (Eielson AFB, shown in Figure 1-1) near Fairbanks, Alaska conducted underthe U.S. Air Force IIRP identified numerous sites where contamination of groundwater byreleases of petroleum, oil, and lubricant products, including JP-4, motor gasoline, anddiesel fuel, may have occurred. T'he sites include spill areas, leaks from storage tanks,and leaks from pipelines. These sites were identified and initially described under anTRP Phase I records search investigation conducted in 1982 (CH2M Hill 1982) and werethe subject of a limited Phase II field investigation in 1984 (Dames and Moore 1985).In the ]IRP Phase I investigation, 12 sites, located within a localized area of the Base.and similar in that all were fuel spill and/or leakage sites, were grouped together withinan area termed 'Potential Fue] Saturated Area" to form a composite site.Recommendations were made for IRF Phase II field confirmation studies of the compositeSite. These sites were Sites 10, 11, 14, 15, 16, 17, 18, 19, 20, 36, 37, and 41 (describedsubsequently).
A limited I.RP Phase II field confirmation study was conducted in 1984 and 1985 andfocused on the above sites, then collectively termed the Fuel Saturated Area. Sixgroundwater monitoring wells were installed within and around the area, treating thearea essentially as a single site. As a result, relatively little site-specific informationwas obtained. The study report noted that four primary Base water supply wells arehydraulically downgradient from the Fuel Saturated Area and could be drawinggroundwater contaminated by the fuel-related sites, thus posing a potential human healthrisk.
1.3 flRP PHASE IV-A EqVESTIGATION
The initial statement of work (SOW) for this investigation (HMTrC 1986) included 19sites, including three sites within the refueling loop (Sites 20A, 20B, and 20C). Becausethe Phase II findings were inconclusive regarding the individual sites, the statement ofwork called for investigation specific to the individual Fuel Saturated Area sites andadded sites 9, 12, 25, 26, and 27. The SOW mandated a "thorough analysis of all datagathered" previously and "implementation of additional site characterizationrequirements".
1-2
~~~~g~~2iMles toFairbanks
Eileson AFBBoundary
Elelsor, AFBlso
0 0.5 1.0 2.0
Source. Eielson Air Force Baow master Plan. - jmilesFIgure 1-1. General Layout of Elelson AFB
1-3
Site 12 (fl'-4 Fuel Spill in Facility No. 2351) was subsequently deleted from the scope ofathe Phase T-V-A investigation because it was determined that the spilled fuel had been Vsfully contained and recovered and that the site posed no hazard. Site 9 (Current FireDepartment Training Area) was identified in the SOW as being located over a closedportion of the current Base landfill. However, the Site 9 identified in the IIRP Phase Ireport had been located immediately south of Site 37 (Drum Storage Site and AsphaltMixing Area) and had been abandoned in favor of the present location at the Baselandfill in the mid-198Gs. The present location retained the Site 9 designation and wasremoved from the scope of this Phase IV-A investigation. T-he former location has beenincluded in Site 37, which was redesignated the Drum Storage Site and Asphalt MixingArea/Former Fire Training Area.
Site 20 (the Refueling Loop Saturated Area) consists of three refueling complexes wherespills have purportedly occurred. To facilitate addressing each complex during theinvestigation, Site 20 was divided into the following three sites: Site 20A - E-7Complex Saturated Area, Site 20B - E-8 Complex Saturated Area, and Site 20C - E-9Complex Saturated. Area.
The resulting scope of work includes 18 sites at which field investigation work has beenconducted. These sites are located within an area encompassing 2.5 square miles nearthe center of the Base (see Figure 1-2). This area includes the refueling loop, thedefueling area, the major petroleum, -oil, and lubricant (POL) storage tanks, and themajority of the underground fuel lines on the installation. The fuels involved includeJP-4, motor gasoline (MOGAS), and diesel fuel. The locations of the project sitesdefine the limiits of the Fuel Saturated Area, although the sites are not thought to becontiguous., Further, available information indicates that fuel spills' and leaks haveimpacted far less than the designated 2.5 square mile area and that the term "saturated"is not descriptive of site conditions. However, the extent of environmentalcontamination has not been fully determined at all of the sites, and additional fieldinvestigations are being conducted to confirm the presence of contaminants and toprovide additional data to support the evaluation of remedial action alternatives intendedto eliminate or control the problems as warranted.
:1-4
2Miles toJ\%Fairbanks
Boundary
EielsolesonAF
14~~4
20~7-1 ~ E-
ExplanationV t-m- Regional groundwater flow direction.... Boundary of fuel saturated area
Ejelsorn AP B N 170 Ongoing IRP Phase IV-A SitesBoundary N + Phase 11, Stage I monitoring Wells
<Background monitoring well
0 0.5 1.0 2.0
Source: Eielson Air Force Base Master Plan.le
Figure 1-2. Locations of Fuel Saturated Area, Fuel Saturated Area
Sites, and Background Sampling Points
1-5
1.4 SiTES ADDRESSED IN THIS REPORTV
1.4.1 Site Descriptions
Twelve of the fuel saturated area sites (Sites 10, 11, 13, 14, 15, 17, 18, 19, 25, 26, 37,and 41) were determined following initial field investigations in 1986 to requireadditional investigation to provide sufficient information for problem definition and tosupport evaluation of remedial action alternatives in a feasibility study. Additionalinvestigations were 'conducted at these sites in 1987 and corresponding data andevaluations are documented in a separate report. The remaining six sites have beendetermined to require no additional consideration under the IRP. These sites areaddressed in this report and are summarized below with Hazard Assessment RankingMethodology (H-ARM) scores determined in the IIRP Phase I records search:
Site Number Site Nanme/H-ARM Score Desciption
16 MOGAS Fuel Line Spilh 56 Large (5,000 gallon)pipeline fuel spill mn 1957
20A Refueling Loop Saturated Area History of runoff from fuel @
(E-7 Complex)/61 spills during aircraftrefueling
20B Refueling Loop Saturated Area History of runoff from fuel(E-8 Complex)/61 spills during aircraft
refueling
20C Refueling Loop Saturated Area History of runoff from fuel(E-9 Complex)/61 spills during aircraft
refueling
27 Weathered Sludge Tank Burial Tank bottom sludge spreadSite/5 i within containment berm
until 1980
36 Drum Storage Site and Asphalt Mixing area for asphalt andMixing Area/60 road oiling operations,
possiible spills between thelat e90 to the mid-1970s.
Detailed descriptions of these sites and figures showing physical features surroundingthe sites are included in Sections 2 through 7, which present site-specific information,discussion of site conditions, and information supporting the decision of the futuredisposition of the sites.
1-6
1.4.2 Field Investization of Sites
From August to October 1986, the Phase lV-A contractor conducted the first round offield investigations at the 18 project sites. The investigation included soil gas surveys,
* ~drilling and soil sampling, monitoring well installation and groundwater sampling, surface* ~soil sampling, surface water and water body sediments sampling, and laboratory analysis
- ~~of samples.
After the 1986 field season, work on the six sites addressed in this report wasconcluded. The remaining 12 sites were the subject of additional investigations in 1987and 1988. Table 1-1 presents a summary of the drilling, sampling, and other activitiesconducted at the six sites addressed in this report. Descriptions of the site-specificactivities conducted are provided in Sections 2 through 7 corresponding to the individualsites.
1.5 BACKGROUND SAMPLES AND EVALUATION CRITERLA
*During this investigation, three surface soil samples -were collected upgradient of thestudy area to provide background data for comparison with fuel compounds in the soilsof the sites. Figure 1-2 shows the locations of these background soil samples. Analyticresults of the samples are shown in Table 1-2. Background sample EB-3, locatedapproximately 25 feet east of Richardson Highway, contained the highest leadconcentration at 15 mg/kg. Sample EB-1, located east of the Small Arms Firing Range,between Ski Lodge Road and the Trans-Alaska Pipeline, contained the second highestconcentration at 13 mg/kg. The lowest concentration of lead (8 mg/kg) was found insample EB-2, which was collected at the edge of a meander scar approximately 1,300feet southeast of the east edge of the refueling loop. These results indicate a strong,though circumstantial, correlation between lead concentrations in surface soils and thedistance of a sample from, and the intensity of, vehicular activity.
To provide similar background data for groundwater analysis, three Phase I1-Amonitoring wells (15-1, 20B-1, and 27-1) were selected as the most upgradient wells inthe study. Table 1-3 shows the results of analysis of samples for these wells that arepertinent to the sites discussed in this document. The locations of these monitoring. wells are shown in Figure 1-2. Evaluation of this data set indicates normal backgroundconcentrations of 6.5 to 34 mg/L for TOG, up to 0.4 mg/L for oil and grease, up to 0.2
1-7
TABLE 1-1. SUMMARY OF DRILLING AM) SAMPLING ACTIVITIS
New Wells Wells
Site No. Number Total Depth1 Sampled Other Activities
16 2 60' 2 Soil gas survey; split-spoon soil sampling at 5-foot intervals
at 5-foot intervals527 3 9 3 Solgas survey-, split-
spoon samples at 5-footintervals; surface soilsampling
36 2 60' 2 Soil gas survey; splitspoon samples at 5-footintervals; surface soilsampling
1 Each new well was drilled to approximately 30 feet.2 A previously existing well (W-3) was sampled.
1-8
TABLE 1-2. SUMMARY OF BACKGROUND SOIL SAMPLES ANALYSIS RESULTS
Compound EB-1 SaEBELflato
Lead (mg/kg) 13 8 15
* ~TIC (uglkg)
1-Butanol L L L
2,2-Dimethyl-3-Methylene-bicyclo[2,2]beptane 40 L L
- ~~3,7-Dimnethyl-1,3,6-Octatrient 95 L L
Methyl Ester Formic Acid L L L
VOC (ug/kg)-
Toluene L L L
Total Xylenes L L L
Notes:
L = less than 5 ug/kgTIC = tentatively identified compoundVOC = volatile organic compoundBackground soil samples were not analyzed for base neutral/acids compoundsRegulatory ARARs do not exist for soils
TABLE 1-3. SUMMARY OF BACKGROUND GROUNDWATER SAMPLEANALYSIS RESULTS AND APPLICABLE ARARs
Compound/Parameter 15-1 Sampling Location
Compound/Parameter 15-120B-1 27-1 ARARs
Lead (ug/L-) 13 8 5 50
Oil and Grease (mag/L) 0.4 LI 0.4 NA
Petroleum HydrocarbonOil and Grease (mg/L) 0.2 Li Li NATOG (mg/L) 34 5.9 6.5 NA
VOC (ugfL)
Benzene L2 L2 L2 5
Total Xylenes 1-2 12 L2 NA
Trichloroethylene L2 L2 L2 5
Notes:
Li = less than 0.1 mg'IJL2 = less than 1 ug/L-NA = Applicable or Relevant and Appropriate Requirement (AR.ARs) do not exist
for these compounds!/paramneters mn voundwater; ARARs shown are MaximumContaminant Levels (MCLs) for drinking water
1-10
2. ~TABLE 1-4. OCCURRENCE OF ACETONE AND MEETRYLENE CHLORIDEIN SOIL SAMPLES
Sample Point Acetone (uglkg) Methylene Chloride (uglkg)
- ~~16-1 (10) D L16-1 (15) 16 D16-1 (20) L D16-1 (3)58 DEB-18 [0830] L L
16-2 (5) 4.8 DF1B-1S [0830] L L
20A-1 (10) 28 L20A-1 (15) 29 L20A-1 (20) 33 L20A-1 (25) 37 LFB-36 L L
20A-2 (0) D L20A-2 (5) 140 L20A-2 10~ D D20A-2 (15~ 94 L20A-2 (30) 25 LFB-35 [0850] D L
20A-3 (5) D L20A-3 (1) D DFB3-35 [050] D L
20B-1 (5) D L20B-1 (10) D L20B- 1 (15) 35 LFB-39 D L
20B-2 (10) 39 L20B-2 (20) D LPB-38 D D
20B-3 (10) 55 LFB-38 D D
20C 1(5) D D20C- 1 (10) L D20C- 1 (15) 260 DFB-41 [0745] D D
TABLE .14. OCCURRENCE OF ACETONE AND ME7HYLENE CHLORIDEIN SOIEL SAMPLES (CONTI[NUED)
Sample Point Acetone (ug/kg) Methylene Chloride (uglkcg)
20C-2 (5) 200 LFB-41 [1105] D L
20C-3 5) 140 L20C-3 1)36 L20C-3 15) 200 L20C-3 20) 180 L20C-3 2)66 LFB-41 .075] D D
27-1 (25) D DEB-19 L L
27-2 (1 L D27-2 (5) 110 D27-2 (10 D LFB-7 L L
27-2 (30) 77 DFB- 10 L L
27-3 (5) 33 DE'B- 10 L L
27SD-1 D LFB-21 [1300] D L
36-1 (0) L D36-1 (20) 67 LEB-11 L L
36-2 (5~) D L26-2 (15 D 94EB- 14 L L
Notes:
D= detected, but not quantifiableL= not detected; detection limit of S ug/kgEB = field blankNumber is parenthesis is sample depth in feet BLSNumber in brackets is time of field blank collection
tI 11
a ~method blanks is acceptable in concentrations up to five times the quantitation limitsV ~set forth in Exhibit C of the same SOW. Other compounds are required to be belowthose quantitation limits. In this context, it appears the acetone and methylene chloridewere introduced to the sample in the laboratory or during the process of sampling andthe reported concentrations do not represent condition at these sites.
1.7 CONCLUSIONS
Evaluations of the data accumulated during the 1986 field investigation indicated that nosubsequent work is necessary at six of the Fuel Saturated Area sites. This documentpresents the procedures and results of investigation of these sites and the bases for thedecision that no further action at these sites is indicated. Each site is discussed in aseparate section as follows:
Section 2: Site 16 -MOGAS Fuel Line Spill SiteSection 3: Site 20A -Refueling Loop (E-7 Complex) Fuel Saturated AreaSection 4: Site 20B -Refueling Loop (E-8 Complex) Fuel Saturated AreaSection 5: Site -20C -Refueling Loop (E-9 Complex) Fuel Saturated AreaSection 6: Site 27 -E-11 Fuel Tank Sludge Burial SiteSection 7: Site 36 - Drum Storage Site and Asphalt Mixing Area.
In addition, drilling logs and monitoring well construction summaries for the monitoringwells installed at the sites addressed in this report are provided in Appendix A.
*~~~~~~1-14
2.0 SITE 16 - MOGAS FUEL LINE SPILL SITE
2.1 BACKGROUND
The Eielson Air Force Base (AFB) Motor Gasoline (MOGAS) Fuel Line Spinl Site islocated near the center of Elelson AFB, along Industrial Road in the vicinity of Building6214. A location map of Site 16 is provided in Figure 2-1. In 1957, an estimated 5,000gallons of MOGAS was spilled in this area from a pipeline that runs from the E-2petroleum oil and lubricant (POL) storage area to the Base vehicle gas station. Duringthe Installation Restoration Program (IRP) Phase I Records Search, the site received aHazard Assessment Rating Methodology (HARM) score of 56 on the basis of thesuspected large volume of spilled product, shallow depth to groundwater, high soilpermeability, and distance to a nearby water supply well (720 feet) (CH2M Hill 1982).
During the IRP Phase MI Stage 1 investigation, the MOGAS Fuel Line Spill Site and 12other sites were addressed collectively as the Potential Fuel Saturated Area. None ofthe Phase II monitoring wells were installed at locations conducive to detecting
contaminants that might have originated at Site 16.0
2.2 SITE INVESTIGATION
2.2.1 Soil Gas
The location of the reported MOGAS spill is only broadly stated in the IRP Phase Ireport. To better establish the location of the spill prior to installing monitoring wells,a soil gas survey was conducted on August 28, 1986. A grid was established alongIndustrial Road in the vicinity of Building 6214. Figure 2-2 shows this grid. MOGAS isa difficult subject for soil gas exploration because of the limited VOC content.However, the shallow depth to groundwater at Eielson AFB was expected to allow atleast the detection of total hydrocarbons.
Six soil gas samples were collected along the northeast side of Industrial Road. Resultsof this sampling are presented in Table 2-1. The observed concentrations wererelatively low and could be attributable to either spill residue or runoff from Industrial
Road. If these data reflected spinl residue, it appears that the leading edge of the 0resulting plume would likely have been near sampling point B12 and that the source
2-1
~~~~~~~~~~~~~~~~1~ ~ ~ ~ ~ ~ ~ ~ ~ ~~~61
- II'
A Thr 1W> ~ ~ ~ ~ ~~~0 0 0
Siurit1eSt 1 Lc16n a
9022~~~~~~~~~~~~~~4
c 0
Ak
X~~~~~~~~_-r A '
$ *1-~~~~~~~~~~~~~o~
*~~~~~~~~~~~~~~~~~~~wndTamc
Ama of lAP Inweszgaton
0 SO 100
Feet
Figure 2-2. Site 16 Soil Gas Grid Map
TABLE 2-1. SITE 16 SOEL GAS RiISULTS (in uge'L)
* ~Sample Point C 1 - C 3 Benzene Toluene Total Hydrocarbons
BOO 0.7 L L 5.6
B03 3.7 L 0.6 6.3
- ~~~BOS 1.9 L ('.2 2.3
B07 5.6 L L 6.0
B10 2.0 L 0.2 2.6
B12 0.7 0.3 (,.6 2.3
Notes:
L = less than detection limit for benzene (0.09 ugiL) or toluene (0.1 ug/L).
2-4
would likel y be near the south corner of Building 6214. These conclusions, along withan expected north-northwesterly groundwater flow, determined monitoring well placementat this site.
2.2.2 Soils
Two boreholes were augered at Site 16 to a depth of 30 feet below land surface (BLS).The downgradient boring (16-2) was located adjacent to Industrial Road, west ofBuilding 6209, to be downgradient of the higher total hydrocarbon soil gas readings.The upgradient boring (16-1) was located south-southwest of boring 16-2 on the eastside of Industrial Road. These locations are shown in Figure 2-3. Both borings werecompleted as monitoring wells.
Cuttings were logged during augering. These logs are presented in Appendix A. Thesoils encountered were predominantly well-graded sands and gravels with a zone of siltysand encountered in the top 16.5 feet of boring 16-2, as shown in Figure 2-4. TheEielson AFB Aerial Photo Mosaic, compiled by Air Photo Tech, Inc. in 1986, revealedatraces of meander scars on the east side of Industrial Road near this site. The siltyWsands are possibly the final inifihing of such a scar.
During augering, samples were collected at 5-foot intervals, beginning at land surface(LS), with a 3-inch outside diameter (O.D.) split-spoon sampler. At the beginning ofeach day, the photoionization detector (PID) was directed upwind to establishbackground PID concentrations for the day. Samples collected during the drillingprogram were transferred from a single split-spoon onto a 1-foot by 2-foot by 3/8-inchTeflon sheet. Composite samples were created by scraping material with a Teflonspatula at intervals along the length of the sample and immediately placing them intopre-labeled sample containers. At sites where samples were to be analyzed for VQCs,the samples were placed into two pre-labeled glass containers. After approximately oneminute, the cap on one of the containers was opened slightly and a headspace readingwas taken with a photoionization detector (PID). If a positive reading (i.e., higher thanlocal background readings) was indicated, the headspace reading and all other pertinentinformation was logged on the sample labels and the corresponding unopened samplecontainer was prepared for shipment to the laboratory.
* ~Photoionization detector (PID) readings were. taken downhole (except at LS), on thesplit-spoon immediately after retrieval, and of headspace (i.e., unfilled space in a jarcontaining a sample) gas at each sample point. Table 2-2 presents the soil PD!) readingsat Site 16. If no positive readings were noted at a borehole, the sample collected atthe depth where groundwater was first encountered was submitted for VOC analysis.All samples were submitted for lead analyses.
Acetone and methylene chloride were the only VOCs found in soil samples from Site 16.- ~~The presence of these compounds is addressed in Section 1.6. Lead was found in aUl
soil samples collected at Site 16, but only at concentrations comparable to thebackground range of 8 to 15 mg/kg. Table 2-3 lists the results of sediment andassociated field blank analyses at Site 16. Ths distribution is more attributable, tocontamination originating at the surface rather than from a spill in a pipe buried 5 to 6feet BL-S. This lead presence is possibly attributable to fallout from exhaust of vehiclesoperating on leaded fuels on Base roads over time. This scenario seems borne out bythe results of lead analyses performed on background soil samples collected south of thedeveloped Base areas as discussed in Section 1.5.
2.2.3 Groundwater
Borings 16-1 and 16-2 were completed as monitoring wells. During drilling of boreholes16-1 and 16-2, 300 and 175 gallons, respectively, of water were used to maintain a headon heaving sands. Therefore, development of each well entailed pumping 1,800 gallonsof water (127 casing volumes) from well 16-1 and 1,550 gallons of water (120 casingvolumes) from well 16-2 in order to ensure that a representative groundwater samplewas obtained. Furthermore, prior to sampling, an additional five casing volumes ofwater was purged from each well to ensure the representativeness of the sample.
A round of water table level readings was taken at all Phase N-A monitoring wells onSeptember 22, 1986. These readings showed a water table difference of 0.87 feetbetween well 16-1 (531.52 feet above mean sea level, AMSL), and well 16-2 (530.65 feetAMSL). Figure 2-5 shows the potentiometric surface at Site 16. The local groundwaterflow direction is north-northeasterly in contrast to the regional north-northwesterlyflow direction. This may be attributable to the influence of pumping at Base watersupply well D at the power plant to the north.
B = background level of 0.2 ppmn for 16-1 and 0.5 ppm for boring 16-2NA =not applicable, no downhole reading prior to augeringNR. not recorded.
2-9
TABLE 2-3. SITE 16 SOIL SAMPLE AND ASSOCIATEDFIELD BLANK ANALYSIS RESULTS
Sample Number Lead (mg/kg)
16-1 (0) 15
16-1 (5) 5
16-1 (10) 4
16-1 (15) 5
16-1 (20) 4
16-1 (25) 4
16-1 (30) 6
16-2 (0) 23
16-2 (5) 7
16-2 (10) 8
16-2 (15) 4
16-2 (20) 6
16-2 (25) 5
16-2 (30) 4
EB- 18 NA
Background Concentration Range 8-15
Notes:
NA= not analyzed for leadFB field blankNumber in parentheses is sample depth in feet BLS
2-10
N \.~~~~4-16-2-\ \ saqes'AMSL
\9022
1~~~~A61
~-Grvtnd Wurur ESuvtan Contour
+ Surveyd Bovatmn Pmt ~Area at IRP 9nwatganomW
tncal (mrundnte 6" ircins 50~~10
Feet
Figure 2-5. Site 16 Potentiometric Surface
* ~Both wells we're sampled on September 25, 1986 for petroleum hydrocarbon oil and* ~grease, ]ead, oil and grease, total organic carbon (TOC), and VOC analyses. Table 2-4
presents the groundwater and corresponding QA/OC analysis results and the background* ~concentration ranges for Site 16. In the Site 16 wells, TOG and petroleum hydrocarbon
oil and grease concentrations were consistent with reported background concentrations.- ~The oil and grease concentrations were two to five times above background!T ~concentrations, but the petroleum hydrocarbon oil and grease results indicate that the
oil and grease concentration is probably not the product of fuels contamination.Furthermore, the 6 ug/L of lead found in the sample from well 16-2 is comparable tobackground and is substantially less than the Safe Drinking Water Act (SDWA) MaximumContaminant Level (MCL) of 50 ug/L (U.S. EPA 540/1-86/060). Trichloroethylene (TCE)(in both wells) and total xylenes (in well 16-2) were the only VOCs identified. Thesecompounds were not present in quantifiable concentrations. As previously stated, TCEis not normally associated with fuels. While the presence of xylenes is characteristic offuels contamination, there is no MCL for total xylenes. The unquantiflably lowconcentrations of total xylenes indicate that the residue of the fuel spill presents no
- * ~significant environment al threat.
2.3 SUAMMARY AND DECISION
2.3.1 Summary
Lead and total xylenes were the only fuel-related compounds identified in the soil orgroundwater samples collected at Site 16. Total xylenes were detected in thegroundwater from well 16-2. However, the concentration of xylene in this sample wasnot sufficient to be quantified and no regulatory limit exists for xylene in water. Leadwas found in all sediment samples and in the groundwater sample from the downgradientwell. No regulatory contaminant limits exist for lead in soils and the highestconcentration [23 mg/kg from sample 16-2(0)] only nominally exceeded backgroundconcentrations (8-15 mg/kg). The lead concentration noted in the groundwater samplefrom well 16-2 (6 ug/L-) exceeded the minimum background concentration by only 1 ug/Land was much less than the SDWA MCLI of 50 ug/I.
TABLE 2-4. SITE 16 GROUNDWATER AND CORRESPONDINGQAIQC ANALYSIS RESULTS
Petroleum QOCi-j1Sample Hydrocarbon Trichloro- TotalNumber Oil and Grease Oil and Grease TOC Lead ethylene Xylenes(mg/L) (mg/L) (mg/L) (ug/L-)
16-i Li 0.9 9.7 1-2 D 1216-2 Li 1.7 12 6 D D
BW-47 1.1 1.5 5.1 L2 L3 12FB-47 Li Li 1.6 12 L2 L2
BackgroundConc. Range Li-0.2 Li-0.4 6.5-34 5-13 12 12
Notes:
Li = not detected; detection limnit of O.i mg/LL2 = not detected; detection limit of 5 ug/L12 = not detected; detection limit of 1 ug/LD = detected, but not quantifiableBW= equipment (bailer) washFB fle, d blank
2-13
2.3.2 Decision
Data generated during the IRP Phase 11 and IV-A field investigations provide noevidence of the presence of residual contamination from the 5,000-gallon fuel spill thatoccurred in 1957. Although a plume could exist northeast of monitoring well 16-2, thePhase IV-A investigation focused on the area in the vicinity of Building 6214 whereresidual contaminants would most likely have been encountered, and it is highly unlikelythat Site 16 poses any threat to public health or to the environment. Therefore, thereis no need for further action and the site will receive no additional consideration underthe IRP.
2-14
3.0 SITE 20A - REFUELING LOOP SATURATED AREA (E-7 COM[PLEX)
3.1 BACKGROUND
The Eielson Air Force Base (AFB) E-7 Refueling Complex is a broad concrete area atthe west end of the Refueling Loop, southwest of the south end of Flight Line Avenue.Figure 3-1 shows the refueling loop area. The E-7 complex contains undergroundpetroleum oil and lubricant (POL) storage tanks, pump stations, and fuel outlets and isthe scene of hot refueling for combat aircraft. Such activity reportedly has resulted infrequent fuel spinls. Floating hydrocarbon product was reportedly found. in test holesdrilled adjacent to the fuel pump stations in 1972 (CH.2M Hill 1982).
During the Installation Restoration Program (IRP) Phase I Records Search, Site 20(consisting of Site 20A, 20B, and 20C) was assigned a Hazard Assessment RankingMethodology (HARM) score of 61. The principal reason for this high score was thepathway subscore of 80, which resulted from "indirect evidence of contaminantmigration" (CH2M Hill 1982). However, this evidence is not discussed in detail. On theabasis of this ranking, one well was recommended to be placed north of the RefuelingWLoop in the vicinity of Building 1346 (Engine Shop).
During the IRP Phase II, Stage 1 investigation, well W-3 was installed inside theRefueling Loop near its western edge (Figure 3-2). This well was drilled and installedto 24 feet below land surface (BLS) and screened from 4 feet BLS to total depth. Soilsamples collected from 5 to 10 feet BLS contained 14 mg/kg of oil and grease.Groundwater from well W-3 contained 5 mgfL of total organic carbon (TOC), 110 ug/Lof total organic halogens (TOX'), 2.8 mg/L of oil and grease, and lead below thedetection limit (0.01 mg/L). No portion of Site 20 was addressed in therecommendations for further work by these investigators. However, data obtained in thePhase II, Stage 1 study indicated that site-specific investigations should be conducted, atall Fuel Saturated Area sites.
3-1
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. 3.2 SITE INVESTIGATION
3.2.1 Soils
Three boreholes were augered to 30 feet below land surface (BLS) in the vicinity of Site20A. Rather than attempt to drill through the concrete refueling loop taxiway and in
- ~anticipation of areas where spilled fuel would likely accumulate, these borings were* ~shifted from the locations selected in the SOW as shown in Figure 3-2.
The supervisory geologist logged the soil characteristics of the cuttings and split-spoonsamples during augering. The logs are presented in Appendix A. The dominant soils arepoorly to well-graded sands with scattered lenses of poorly graded gravels and siltysands (Figures 3-3 and 3-4). The depositional sequences observed are characteristic ofstream channel filling and overbank deposits typical of a floodplain environment. Eachboring was completed as a monitoring well.. Samples were collected at 5-foot intervals, beginning at the LbS for each boring, using a3-inch outside diameter (O.D.) split-spoon sampler. At each sample interval, readingswere tak~n downhole, on the freshly opened split-spoon, and of the headspace in ajarred sample with a photoionization detector (PID). PID results are presented in Table3-1. Samples that were collected at depths where groundwater was first encounteredand samples with a headspace reading exceeding background were shipped to thesubcontract laboratory for volatile organic compound (VOC) analysis.
Five contaminants (toluene, total xylenes, 2-butanone, methyl ester formic acid, and 1-butanol) were identified in laboratory analyses conducted on Site 20A soil samples.Table 3-2 presents the soil sample and associated field blank analysis results for Site20A. 2-Butanone (also known as ethyl methylketone), which is an alcohol-basecompound common to solvents and degreasing agents, was detected at 5 feet BLS inboring 20A-2, but not in quantifiable concentrations. The only fuels-related compounds(toluene and total xylenes) were found in unquantiflably low concentrations between 5and 15 feet BLJS in boring 20A-2. No action limits exist for either compound in soils.
Two tentatively identified compounds (TCs) were reported in Site 20A soil samples.
Methyl ester formic acid, found at 10 feet BL.S in boring 20A-1 at 11 uglkg, is a
common component of larvacides and, as such, is most likely residue from mosquito
L =nflt detected; detection limit of 5 ug/kg. ~D = detected; but not quantifiableKR= not reportedFB= field blankNumber in parentheses indicates sample depth in feet BLS
3-8
control spr'aying. 1-Butanol, another component of solvents and degreasing agents, wasreported in the sample from 10 feet BLS in boring 20A-2.
3.2.2 Groundwater
All three borings (20A-1, 20A-2, and 20A-3) were completed as monitoring wells. Duringaugering, 75 to 250 gallons of water was used to maintain a hydrostatic head downholeon heaving sands. As a result, 25 to 104 casing volumes of water were pumped fromthese wells during development. In addition, 5 to 5.5 casing volumes of water werepurged from each of these wells and well W-3 prior to sampling to ensure representativesamples of formation water.
Water level readings were taken at all Phase TV-A wells on September 22, 1986.Reference elevations and coordinates were not obtained at the three flush-installed wells(20A-2, 20A-3, and 20B-2) because the wells curb boxes were buried under snow andcould not be located. The potentiometric surface map, shown in Figure 3-5, showsdashed contours where water table elevations were calculated based on estimated landasurface elevations, rather than on surveyed elevations. The dominant groundwater flowWdirection is northwesterly with some warping of contours, presumably influenced by theconcrete refueling loop, which extends below the water table, If the surface waterelevations of the ponds inside the refueling loop are surficial expressions of the watertable, then Tab C-i of the new Base Layout Map (generated from the Aerial PhotoMosaic) reveals a significant anomaly. According to this map, the most northwesterlypond had a water surface elevation of 540.5 feet above mean sea level (AMSL) (or 1.5feet above the projected water table) and the most southeasterly pond had a watersurface elevation of 539.5 feet AMSL (or 1.5 feet below the projected water table) inMay 1986. Although the date of the map aerial photography and the data of the waterlevel readings are too widely separated for the map surface water elevations to be usedin the preparation of the potentiometric surface map, the relative elevations imply thatthe refueling loop taxiway may depress the water table inside the loop to the southeastand create a groundwater mounding effect inside the loop to the northwest.
All three Site 20A wells (20A-1, 20A-2, and 20A-3) and weUl W-3 were sampled onSeptember 23,-1986 for petroleum hydrocarbon oil and grease, oil and grease,'TOG, andaVOCs. Wells 15-1, 20B-1, and 27-1 data were used for background water quality data asWdiscussed in Section 1.5. The analytic results from these samples, along with the
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appropriate field blank and bailer wash results and background concentrations, arepresented in' Table 3-3. These results show that the measurable concentrations of TOG, ioil and grease, and petroleum hydrocarbon oil and grease in the Site 20A wells arecomparable to those observed in the background groundwater samples.
The sole anomalous result of the VOC analyses was the detection of an unquantifiablylow concentration of benzene at well 20A-3. The Safe Drinking Water Act (SDWA)Maximum Contaminant Level (MCL) for benzene is 5 ug/L. The concentration detectedat well 20A-3 is most likely in the 5 to 25 ug/L range, which equals or exceeds theMCL. However, there are no active drinking water wells and two wells (numbered 13and N) inside the refueling loop are abandoned. Also, the concrete slab of the refuelingloop extends 2 to 3 feet below the water table, creating a limited vertical aquitard. Itis not likely that the floating fraction of a light contaminant, such as benzene (density= 0.88, (CRC 1977)) could escape such a setting. It is unknown to what extent, if any,that'dissolved benzene might migrate from this area. In light of the low concentration,we do not feel that benzene at this location constitutes a hazard.
3.3 SUMMVARY AND DECISION
3.3.1 Summay
The only fuels-related compounds observed in Site 20A sediment samples were tolueneand total xylenes, which were found in the 5- to 15-feet BLS interval. In no caseswere the detected concentrations quantifiable and no regulatory action limits exist foreither compound in water or sediments. The remaining compounds found in sedimentsare attributable to mosquito control activities (methyl ester formic acid) and aircraftservicing (1-butanol and 2-butanone). Of these, 1-butanol and methyl ester formic adidwere observed in quantifiable concentrations.
While quantifiable concentrations of oil and grease, petroleum hydrocarbon oil andgrease, and TOC were found in Site 20A groundwater samples, all reportedconcentrations were below background concentrations. Benzene was found in well 20A-3. The concentration, though not quantified, is reported in the 5 to 25 ugtL range,making it at least equal to the SDWA MCL for benzene. However, the structure of thearefueling loop appears to serve as an effective physical control measure, cutting offVsubsurface pathways and isolating this area from drinking water wells.
3-11
TABLE 3-3. SITE 20A GROUNDWATER AND CORRESPONDING
QA/QC ANALYSIS RESULTS
PetroleumSample Hydrocarbon VOCs (gufLNumber Oil and Grease Oil and Grease TOC Benzene
(mgIL) (mgIL) (mg/L)
20A-i 0.2 0.2 8.3 12
20A-2 Li Li ii 12
20A-3 0.1 0.1 8.3 D
W-3 0.2 0.3 47 L2
BW-44 Li LI 3.4 I-2
FB-44 Li Li 1.6 L2
a ~BackgroundU ~Conci Range L1-0.2 L1-0.4 6-34 L2
Notes:
Li = not detected; detection limit of 0.1 mgfLL2 = not detected; detection limit of i ug/LD = detected; but not quantifiableBW =equipment (bailer) washFB =field blank
3-12
3.3.2 Decision
Data generated during the IR.P Phases II and IV-A field investigations do notsubstantiate reports of floating product in the vicinity of the E-7 Hot Cargo Pad on therefueling loop. While there are indications of low levels of fuels-related compounds,including trace concentrations of benzene, it appears that the nature of the refuelingloop construction effectively isolates the compounds from off-site migration to the Basewater supply. No indication exists of a threat to public health or the environment.Therefore, there is no need for further action and the site wfll receive no additionalconsideration under the IRP
3-13
4.0 SITE 20B - REFUELING LOOP SATURATED AREA (E-8 COMPLEX)
4.1 BACKGROUND
The Ejelson Air Force Base (AFB) E-8 Refueling Complex is a broad concrete area atthe south end of the Refueling Loop. Other than its location, which is shown in Figure
* ~3-1, its layout, mission, and history of reported fuel spills are comparable to those ofthe E-7 Complex, which is discussed in Section 3.1.
4.2 SITE INVESTIGATION
4.2.1 Soils
Three boreholes were augered to 30 feet below land surface (BLS) in the vicinity of Site20B. Rather than attempt to drill through the concrete refueling loop taxiway and inanticipation of areas where spilled fuel would likely accumulate, these borings wereshifted from the locations selected in the SOW to depressions around the E-8 complex,. ~as shown in Figure 3-2. Boring 20B-1, located outside the refueling loop at the southcorner of the E-8 complex, is the upgradient location for Site 20B and the mostupgradient point for all the Phase IV-A field investigations. Borings 20B-2 and 20B-3were located 100 feet southwest and 280 feet southeast, respectively, of the northcorner of the E-8 complex, inside the refueling loop.
The supervisory geologist logged the soil characteri stics of the cuttings and split-spoonsamples during augering. The logs are presented in Appendix A. These data were usedto construct the cross-sections in Figures 4-1 and 4-2. As at Site 20A, the dominantsoils are poorly to well-graded sands with scattered lenses of poorly graded gravels andsilty sands. The depositional sequences observed are characteristic of stream channelfilling and overbank deposits typical of a floodplain environment. Each boring wascompleted as a monitoring well. Well 20B-2 was installed flush writh the land surface(LS) to avoid potential hazard to aircraft.
Samples were collected at 5-foot intervals, beginning at the LS for each boring, using a3-inch outside diameter (O.D.) split-spoon sampler. At each sample interval, readings. were taken downhole, on the freshly opened split-spoon, and of the headspace in ajarred sample with a photoionization detector (PDD). Only headspace PIDE readings were
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made at boring 20B-1 because of a temporary problem with the PDD. PDD results arepresented in Table 4-1. Samples that were collected at depths where groundwater wasfirst encountered and samples with a headspace reading exceeding background wereshipped to the subcontract laboratory for volatile organic compound (VOC) analysis.The surface sample from boring 2GB-1 was not analyzed because the positive headspacereading for this sample was attributed to gases released from reported peat contained inthe sample, rather than to fuel compounds.
Acetone was the only VOC observed in the sediment samples analyzed. The presence ofacetone is addressed in Section 1.6.
4.2.2 Groundwater
All three borings (2GB3-i, 20B-2, and 20B3-3) were completed as monitoring wells. It wasnecessary to use 75 to 400 gallons of water to maintain a head to prevent sands fromheaving inside the augers during drilling. Therefore, 32 to 146 casing volumes of waterwere pumped from these wells during development. An additional 5 to 6.5 casingvolumes of water were purged before sampling to ensure that samples would berepresentative of formation water.
A round of water table levels was taken at Sites 20A, 20B, and 20C on September 22,1986. T'he results of these readings are discussed in Section 3.2.2 and thepotentiometric surface map is presented in Figure 3-5.
Groundwater samples were collected from each Site 20B well (201B-i, 20B-2, and 20B-3)on September 23, 1986. These samples were analyzed for petroleum hydrocarbon oil andgrease, oil and grease, total organic carbon (TOG), and VOCs. The results of theseanalyses are presented in Table 4-2 along with the associated QA/QC sample results andbackground concentrations. While both downgradient wells (20B3-2 and 20B-3) containedmeasurable quantities of petroleum hydrocarbon oil and grease, oil and grease, and TOG,these concentrations were within the observed background ranges of groundwaterquality. In addition, no VOCs were reported in Site 20B groundwater samples.
Ovotes:5l - background level of 0 ppm for borings 208-1 and 208-382 - background level of 0.5 pp~n for boring 208-2NA * not applicable, no ownhole reading prior to augering
NR = not recorded
4-5
TABLE 4-2. SITE 2OB GROUNDWATER AND CORRESPONDINGQAIQC ANALYSIS RESULTS
PetroleumSample HydrocarbonNumber Oil and Grease Oil and Grease TOC
(mg/L) (mg/L) (mg/L)
2GB-1 Li Li 5.9
20B-2 0.2 0.2 13
20B-3 0.1 0.1 13
BW-44 Li Li 3.4
FB-44 Li Li 1.6
BackgroundConc. Range L1-0.2 Ll-0.4 . 6-34
Notes:0
Li not detected; detection limit of 0.1 mg/LBW =equipment (bailer) washEB = field blank
4-6
43 SUMMARY AND DECISION
4.3.1 Summar
There were no specific fuel-related compounds found in either sediment or groundwatersamples collected at Site 20B. Groundwater samples contained quantifiable concentrationsof petroleum hydrocarbon oil and grease, oil and grease, and TOG; however, all werewithin ranges observed in background samples.
4.32 Decision
Data acquired during the IRP Phase NV-A field investigation has not substantiatedreports of floating fuel product in the area of the E-8 complex. There are noindications that Site 20B poses a threat to public health or the environment. Therefore,no further action is recommended at Site 20B and the site will receive no additionalconsideration under the IRP.
4-7
5.0 SITE 20C - REFUELING LOOP SATURATED AREA (E-9 COM:PLEX)
5.1 BACKGROUND
The Eielson Air Force Base (AFB) E-9 Hangar Complex is a broad, concrete area alongthe north-northeast side of the refueling loop, as shown in Figure 3-1. Other than thepresence of hangars along the northeast edge of the complex and aircraft maintenanceshop to the west, its layout, mission, and history of reported fuel spillage arecomparable to those of the E-7 Complex, which is discussed in Section 3.1.
5.2 SITE INVESTIGATION
5.2.1 Soils
Three boreholes were augered to 30 feet below land surface (BL.S) at Site 20G. Asshown in Figure 3-2, the locations of these boreholes were shifted from those shown inthe initial statement of work, rather-than attempting to drill through the E-9 complexconcrete, and to accommodate the anticipated north-northwesterly groundwater flow(HMTC 19~86). Boring 20C-1 was located inside the refueling loop at the south corner ofthe E-9 complex. Boring 20C-2 was located outside the refueling loop to the west ofBuilding 1306. Boring 20C-3 was located north of Hangar 1338.
Lithologic logs were developed by the supervisory geologist based on cuttings and split-spoon samples. The logs are presented in Appendix A. The soils at Site 20C are mostlypoorly to well-sorted sands. As shown in Figures 5-1 and 5-2, there is a notableincrease in the abundance of poorly graded gravels and an increase in the traceablelateral extent of silty sands not encountered Sites 20A and 20B. The sediments presentat Site 20C are consistent with braided channel deposits in a flood plain.
During augering, sampling was conducted at 5-foot intervals from land surface (LS) tototal depth. Samples were collected with a 3-inch outside diameter (O.D.) split-spoon.Photoionization detector (PID) readings were made downhole prior to driving thesampler, upon opening the freshly retrieved split spoon, and of the headspace gasshortly after the sample had been containerized. These reading are compiled in Table5-1. Soil samples collected at the water table and samples with headspace readingsexceeding background concentrations were shipped to the laboratory for volatile organic
B - background level of 0.2 ppm for all boringsM * no data, detector malfunctioningNA -not applicable, no downhole reading prior to augeringKR* not recorded
5-4
compound (VOC) analysis.
Only two compounds (acetone and methylene chloride) were detected in the Site 20CVOC analyses. The presence of these compounds are attributed to laboratorycontamination as discussed in Section 1.6
5.2.2 Groudwater
Borings 20(C-1, 20(C-2, and 20C-3 were all completed as monitoring wells. Duringaugering it was necessary to introduce 75 to 300 gallons of water through the augers tomaintain hydrostatic head on heaving sands. In an effort to ensure that the majority ofthis introduced water was recovered, 33 to 111 casing volumes of water were pumpedfrom these wells during development. Prior to sampling, 5 to 11 additional casingvolumes of water were purged to ensure that collected samples would be representative~of formation water.
Water table level readings were taken at Site 20C2 on September 22, 1986. The resultsaof these readings are discussed in Section 3.2.2. The potentiometric surface mapVdeveloped from these readings is presented in Figure 3-5.
Site 20C2 groundwater samples were collected on September 23, 1986 and shipped to thelaboratory for petroleum hydrocarbon oil and grease, oil and grease, TOG, and VOCanalyses. The results of these analyses are summarized in Table 5-2 along with theassociated QA/QC samples and background concentrations. Positive values for petroleumhydrocarbon oil and grease and oil and grease were obtained for both downgradientwells. TOG was identified in samples from all three wells (20C-1, 20(2-2, and 20(2.3).In all cases, the concentrations observed were within the range of concentrationsmeasured in background samples.
5-5
TABLE 5-2. SITE 2OC GROUNDWATER AND CORRESPONDINGQA/QC ANALYSIS RESULTS
PetroleumSample HydrocarbonNumber Oil and Grease Oil and Grease TOC
(mg/L) (mg/L) (mg/L)
20C-1 Li Li 12
20C-2 0.1 0.1 11
20C-3 0.1 0.1 13
BW-44 Li Li 3.4
FB-44 Li Li 1.6
BackgroundConc. Range LI--0.2 Ll-0.4 6-34
ONotes:LI not detected; detection limit of 0.1 mgfLBW =equipment (bailer) washEB =field blank
5-6
5.3 SUMMARY AM) DECISION
5.3.1 Summar
No compounds characteristic of fuel contamination were found in soils or groundwatersamples collected at Site 20G. Petroleum hydrocarbon oil and grease, oi] and grease,and TOC concentrations found in Site 20C groundwater samples were all within therange of concentrations observed in the samples from the designated background wells(15-1, 20B-1, and 27-1).
5.3.2 Decision
The data accumulated during the Site 20C field investigation provided no indications offloating fuel product around the E-9 complex that had been cited in the IRP Phase Ireport (CH2M Hill 1982). There is no indication of a threat to the environment orpublic health from Site 20G. Therefore, no further action is needed and the site willreceive no additional consideration under the IRP.
5.3.3 Recent Developments
Since the preparation of this document, a fuel spill was reported at a pump station inthe E-9 complex (Site 20C). Harding-Lawson, subcontractor to the U.S. Air ForceOccupational and Environmental Health Laboratory, is conducting further remedialinvestigations at Sites 20A, 20B, and 20C.
5.7
6.0 SITE 27 - WEATHER-ED SLUDGE TANK BURIAL SITE
6.1 BACKGROUND
The E-11 Petroleum, Oil, and Lubricant (POL) Storage Area is a complex of five fueltanks and Building 6261 on the south side of Quarry Road approximately 2,000 feetsoutheast of POL Lake. The Weathered Sludge Tank Burial Site is situated between
* ~Tanks 6381, 6382, 6384, and 6386 and south of Tank 6380, as shown in Figure 6-1.These tanks are cleaned at three- to six-year intervals. Prior to 1980, the sludge,composed of water, rust, dirt, and fuel, was buried within the storage area. Since 1980,the sludge has been drummed and shipped off-base for disposal.
In the Installation Restoration Program (IRP) Phase I Record Search Report, Site 27received a Hazarqd Assessment Rating Methodology (HARM) score of 51 (CH2M Hill 1982).The leading contributing factors- to this score were the shallow depth to groundwater[reportedly less than 10 feet below land surface (BLS)], the presence of highlypermeable soils, and the possibility that leaded aviation gasoline (AVGAS) was includeda ~in the buried sludge. The Phase I report indicated that most volatile constituents would
W ~have evaporated 4uring weathering. This site was not addressed in the fIRP Phase H,Stage 1 investigation (Dames & Moore 1985).
6.2 SITE INVESTIGATION
6.2.1 Soil Gas
Two initial and three supplemental soil gas transects were established on the north andwest sides of the E-11 POL Storage Area (Figure 6-2) in an effort to optimize welllocations, based on detecting the migration of any remaining volatiles. Eight soil gassamples were collected along the west transect (00). The highest concentration of totalhydrocarbons was 11 ugfL at sampling point 100. Most of this and the other observedtotal hydrocarbon concentrations were composed of methane, likely the result of thedecomposition of natural organic matter. Seven soil gas samples and one groundwatersample were collected along the north transect (L). The groundwater sample wasanalyzed in the on-site gas chromatograph being usea for analysis of soil gas samples.O ~Very low concentrations (less than 2 ug/L) of benzene and toluene were found in soilgas samples at points L05 and L12 and of toluene only at L02. In addition, the water
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sample collected at point L03, while not showing any benzene or toluene, contained 24aug/L of total hydrocarbons other than methane, On the basis of these results, threeWadditional transects (M, N, and 0) were established to concentrate on the northwestcorner of the E-11 complex. A total of six soil gas and two groundwater samples werecollected in this area. The only significant positive reading was in the groundwatersample from point N0)1 where, after factoring out methane, a total hydrocarbonconcentration of 93 ug/L, including 58 ug/L of toluene, was found. Efforts to tracksample point N01 results further to the northwest were unsuccessful because the soil gasprobe could not be driven through the packed gravel of Quarry Road. The results ofgas chromatograph analysis of samples collected at Site 27 are presented in Table 6-1.The resulting isoconcentration contours of total hydrocarbons are shown in Figure 6-2.
6.2.2 Soils
Three boreholes for monitoring well installation were augered (one upgradient, twodowngradient) to a depth of 30 feet BLS. The upgradient boring (27-1), originallylocated approximately on line with the berm between Tanks 6382 and 6384 to the southof the E-11 complex, was shifted about 40 feet to the northwest to facilitate rig access.Borings 27-2 and 27-3 were relocated 70 feet east and 170 feet west-northwest,respectively, of the locations indicated in the initial statement of work in response tothe anomalously high toluene concentrations observed in the soil gas investigation.Planned and final borehole locations are shown in Figure 6-3. AUl borings werecompleted as monitoring wells.
Lithologic logs were developed from descriptions of samples and cuttings made duringaugering. The logs are provided in Appendix A. Samples were collected at five-footintervals, commencing at land surface, with a 3-inch outside diameter (O.D.) split-spoonsampler. Soils were dominantly poorly- to well-graded sands and gravels with alaterally extensive surficial lens of silty sand. This reflects a meandering streamsenvironment with a recent abundance of fine overbank deposits, probably due to theinfilling of the last channel. This interpretation is reflected in the cross sections inFigures 6-4 and 6-5.
During augering, samples were collected at 5-foot intervals, beginning at land surface(LS), with a 3-inch outside diameter (O.D.) split-spoon sampler. Photoionizationdetector (PID) readings were taken downhole (except at land surface), on the split-spoon
6-4
TABLJE 6-1. SITE 27 SOIL GAS RESULTS (in ug/L)
Sample Point C1 - C 3 Benzene Toluene Total Hydrocarbons
AOO I LiI 0.5
coo 4.7 LI I 4.9
EOO 0.8 LI Li 0.8
GOO 4.8 Li I 6
100 1i Li Li 11
JOG 7.3 LI Li 7.3
KOO 0.09 Li Li 0.09
LOO 1.8 Li Li 1.8
L02 17 12 1.7 21. ~L03 367 LI Li 367L03W 39 Li LI 63
L05 38 0.3 1.2 40
L09 8 12 12 8
L12 I 0.7 0.7 6
L15 20 Li Li 20
L20 6 Li Li 6
M03 2 12 LI 4.6
N01W 99 12 58 192
N02 720 L12 LI 720
N02W 312 12 22 350
6-5
TABLE 641. SITE 27 SOIL GAS RESULTS (in ugfL) (Cont)
Sample Point Cl - C 3 Benzene Toluene Total Hydrocarbons
N03 400 12 L2 408
N04 780 12 Li 780
N05 1.6 12 Li 1.6
003 1.3 L2 I 2.3
Notes:
I =interference from adjacent peaksLI= not detected; detection limit of 0.1 ugfLL2 =not detected; detection limit of 0.09 ug/l,W = groundwater sample
6-6
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immediately after retrieval, and of headspace (i.e., the unfilfled space in a samnple jar) ataeach sampling point. Table 6-2 presents the headspace PID readings at boreholes 27-1,W27-2, and 27-3. Soil samples were selected for laboratory analysis for volatile organiccompounds (VOCs) if they had a positive headspace reading of greater than 1 ppm abovebackground levels, If no positive readings were recorded at a borehole, then only thesample collected at the depth where groundwater was firt encountered was sent forVOC analysis. No VOCs were detected in any of the soil samples submitted foranalysis.
The results of lead analyses on Site 27 samples and the associated QA/OC samples andbackground concentrations are shown in Table 6-3. The lead concentrations in soilsamples from Site 27 followed the same distribution observed at Site 16, whereconcentrations were significantly lower below land surface than at land surface.However, the higher surficial concentrations of 7 to 8 mg/kg at Site 27 were less thanthe 15 to 23 mg/kg values at Site 16. This is probably attributable to lower vehicularactivity and therefore fewer leaded fuel emissions at Site 27. As at Site 16, subsurfaceconcentrations were in the 4 to 6 mg/kg range. All lead concentrations at this site areequal to or below surface soil background concentrations.
6.2.3 ~Groundwat~er
During the augering of borings 27-1, 27-2, and 27-3, between 50 and 200 gallons ofpotable water were introduced through the auger flights into the borehole to controlheaving sands. After the wells were installed, 25 to 67 casing volumes of water werepumped from these wells to ensure that the bulk of this introduced water wasrecovered. An additional five to six casing volumes were purged prior to sampling toensure that collected groundwater samples were representative of the formation water.
Prior to purging and sampling Site 27 wells, water table levels were taken at all IRPPhase IV-A monitoring wells. The potentiometric surface map for Site 27, shown inFigure 6-6, was developed from these data. The dominantly north-northwesterly Base-xvide flow direction is warped to a more northwesterly direction across Site 27, probablyby recharge originating in topographic highs to the east. The water table gradientbetween wells 27-1 and 27-2 is approximately 4.4 feet per mile.
6-10
TABLE 6-2. SITE 27 KEADSPACE PIm READINGS (in ppm)
Bi = less than or equal to 1.2 ppmn for boring 27-1 on 9/9/86B2 = less than or equal to 0.8 ppm for boring 27-1 on 9/10/86B3 = less than or equal to 1.4 ppmn for boring 27-2B4 = less than or equal to 0.6 ppm for boring 27-3
6-11
TABLE 6-3. SITE 27 SOIL SAMPLE AND ASSOCIATEDFIELD BLANK ANALYSIS RESULTS
Li not detected; detection limit of 5 mg/kgPB field blankNumber in parentheses is sample depth in feet BLS.
6-12
624 II/
-6250
-% ~x 6254 I 276258 11 6263
k~~~~64 7a . 48
- - -p~~~~~~~~~~~Cuar
- - -- - ~ 27-
7V AM~~~~~~~~~~~~~xdaao
-ruOcmEeto oti
A E xSI pIrvntiatiocs
Figure 6-6. Site 27 Potentiometric Surface
6-13
Site 27 wells (27-1, 27-2, and 27-3) were sampled for lead, petroleum hydrocarbon oilaand grease,' oil and grease, TOC, and VOC on September 25, 1986. Well 27-1, alongWwith upgradient wells 15-1 and 20B-1 were used as background monitoring wells. Theresults of these groundwater analyses are presented in Table 6-4. The only results ofconcern are the presence of 0.8 mg/L of oil and grease and 0.4 mg/L petroleumhydrocarbon oil and grease in the sample from well'27-2. These concentrations exceedthe highest background concentration. Also, the location of well 27-2 is in the vicinityof the high soil gas concentrations. No action limits exist for these indicatorparameters. Also, the VOC analysis did not detect the presence of any fuel-related orother volatile organic compounds in the groundwater. Observed lead concentrationsexceed background concentrations, but are less than or equal to 20 percent of thePrimary Drinking Water Standard Maximum Contaminant Limit (MCL) of 50 ug/L (USEPA540/1-861060).
6.3 SUMMARY AND DECISION
6.3.1 Summara
Only in the vicinity of well 27-2 were there indications of possible fuel contaminationWat Site 27. Beginning with soil gas results showing an anomalous zone of high totalhydrocarbon values near the northwest corner of the E-11 Fuel Storage Area, continuingwith PID headspace readings on soil samples that exceeded background on five of sevensamples during augering of borehole 27-2, and concluding with petroleum hydrocarbon oiland grease and oil and grease concentrations twice background in the groundwatersample from well 27-2, the potential for fuels-related contamination in this areas wasindicated. However, neither lead nor VOC analyses of soil and groundwater samplessupported this possibility. Results of lead analyses of soil samples were all within therange of concentration found in background soils samples. Lead concentrations ingroundwater were significantly less than regulatory limits. No VOCs were detected ineither the groundwater or soils.
6.3.2 Decision
Some of the data obtained during the MRP Phase IV-A field investigation do provideindications of significant fuel-related contamnination derived from Site 27. However, onathe basis of all the data, the sludge disposal practices at the E-11 POL Storage AreaW
6-14
I. ~ ~~ TABLE 6-4. SITE 27 GROUNDWATER AND CORRESPONDINGQA/QC ANALYSIS RESULTS
Petroleum- ~~Sample Hydrocarbon Oi and Grease TOC Lead
Number Oil and Grease (mg/L) (mg/L) (ug/L)(mg/L)
27-i LI 0.4 6.5 5
27-2 0.4 0.8 11 ia27-3 LI 0.2 12 8
BW-47 1.1 1.5 5.1 L2PB-47 LI Li' 1.6 L2
BackgroundConc. Range Li-0.2 LI-0.4 6-34 5-13
Notes:
Li = not detected; detection limit of 0.1 mg/L'L2 = not detected; detection limit of 5 ug/LBW= equipment (bailer) washPB= field blank
6-15
appear to have posed no public health or environmental threat. Therefore, no furtheraaction is needed and the site will receive no additional consideration under the IRUP. W
6-16
7.0 SrrE 36 - DRUM STORAGE SiTE AND ASPHALT MIXING AREA
7.1 BACKGROUND
The Eielson Air Force Base (AFB) Drum Storage Site and Asphalt Mixing Area is locatednear the center of Eielson AFB, southeast of Buildings 6213 and 6215. A location mapof Site 36 is provided in Figure 7-1. The site was used as a mixing area for asphaltand as the center for the road oiling operation from the late 1960s to the mid-1970s. Amixing tank used for mixing tar and asphalt emulsion for road maintenance and mixingwaste oils and contaminated fuel for road oiling operations is a potential source ofpetroleum oil and lubricant (POL) contamination. Drums of waste oils, hydraulic fluid,diesel fuel, and other POts stored at the site are other potential sources of pastcontamination. However, no drums were observed to be leaking during the InstallationRestoration Program (IRP) Phase I Records Search (CH2M Hill 1982).
Site 36 was assigned an overall score of 60 using the Hazardous Assessment RankingMethodology (HARM) during the IRP Phase I Records Search (CH2M Hill 1982). Thea ~pnincipal reason for this high score was the pathways subscore of 80, resulting fromV ~indirect evidence of contamination (CH2M Hill). This evidence was reported as a "POL-saturated ground surface" and a "pool of POL-contanmjnated water" adjacent to themixing tank. The distance of 800 feet to the nearest water supply well correspondedwith a receptor subscore of 52. The waste characterization subscore of 43 was due to"medium quantities of waste oils, fuel, and asphalt" that were spilled at the site (CH2MHill 1982).
During the IIRP Phase II, Stage 1 investigation, the Drum Storage and Asphalt MixingArea and 12 other sites were addressed collectively as the Fuel Saturated Area (Dames& Moore 1985). Six monitoring wells were installed within the assumed boundaries ofthat area. None of the Phase 1I monitoring wells were installed at locations conduciveto detecting contaminants that might have originated at Site 36.
7-1
A--~~~re
5~~~~~~~~~
3~~~~~~~~I
)L Explano'I
II
7-2
. ~7.2 SUTE INVESTIGATION
7.2.1 Soil Gas
At the outset, there was considerable uncertainty regarding the actual location of theDrum Storage Area, as well as the types of waste oils and contaminated fuels handled
7 - during the asphalt and road oil mixing activities at Site 36. Therefore, a soil gassurvey was conducted at 14 sample points, based on the grid shown in Figure 7-2. The
- ~~majority of sample paints were located along two intersecting transects. Transect "04",paralleling the first road east of Building 6215, was intended-to confirm the location ofthe Drum Storage Area. Transect "C' trending southwest to northeast from the eastcorner of Building 6215, was designed to determine the lateral extent of contamination.
Twelve samples were collected and analyzed for fuel compounds. Five of those samplesand two additional samples were analyzed for halogenated solvents. Table 7-1 lists the.soil gas results of the analysis for fuels and Table 7-2 lists the results of the analysisfor halogenated solvents. No significant soil gas contaminant concentrations wereO ~~observed in the vicinity of Site 36, except for isolated concentrations of trichloroethene(TCE) as high as 500 ug/L (Point AA05) at the northern edge of the site.
7.2.2 Soils
Two boreholes were augered at Site 36 to a depth of 30 feet below land surface (BLS).The downgradient boring (36-2) was located east of Building 6209 along the northshoulder of the dirt road to be downgradient of the highest soil gas readings of totalhydrocarbons. The upgradient boring (36-1) was located south-southeast of boring 36-2on the east side of the dirt road behind Building 6215. Both borings were completed asmonitoring wells. The boring locations are shown in Figure 7-3.
Lithologic logs were developed from descriptions of samples and cuttings made duringaugering. The logs are provided in Appendix A. The soils encountered during augeringwere predominantly alluvial sediments, consisting of very fine to coarse sand with somepebbles. Traces of clay and silt were encountered 0-5 feet BLS in well 36-1 and 0-10feet BLS in well 36-2. T'he soil was slightly cohesive to compact in both wells.. ~Organic matter was found near the surface in well 36-1 and as deep as 5 feet BLS inwell 36-2. Figure 7-4 shows a cross section based on soils from the borings at Site 36.
7-3
IA ~ ~ ~ ~ ~ ~ -
54
IL~ ~ ~ ~ ~ ~ ~~~I
3~~~~~~~~~~~/I
SampleSalvage
C'~ Area of IRP Aresti ato
7-4
TABLE 7-1. SITE 36 SOIL GAS RESULTS FOR HYDROCARBONS (in ugfL)
Sample Point C1 - C 3 Benzene Toluene Total Hydrocarbons
A03 170 LI L2 1704- ~~A04 13 LI Li 13
A05 4.0 1.0 0.7 8.0B03 3.0 Li 1 4.6BB05 18 Li Li 21
C02 3.0 Li 12 3.0
C03 3.0 12 12 2.9
C04 4.0 LI 12 3.5
C06 3.0 Li 12 4.5
* ~~C07 8.4 Li 12 9.0
E04 3.2 LI L2 3.5
G04 6.6 Li 12 7.6
Notes:
Li = not detected; detection limit of 0.08 ug/L-12 = not detected; detection limit of 0.09 ug/L-I = interference with adjacent peaks
7-5
TABLE 7-2. SITE 36 SOn.L GAS RESULTS FOR HALOGENATED SOLVENTS (in ugIL)
Sample Point Trichloroacetic Trichloroethene TetrachloroetheneAcid
Li = not detected; detection limit of 0.0002 ugfLL-2 = not detected; detection limit of 0.0003 ug/L-3 = not detected; detection limnit of 0.004 ug?'1.4 = not detected; detection limit of 0.006 ugfLL-5 = not detected; detection limit of 0.02 ug/L
7-6
36~~~~~~2~-
540-
Sala-Stoag
-. - ~ re
I. I/7~~~~~~~~~S
'I~~'
-A~~~~~hsi VAMnoi e
I*- Rgionl Gcunc Salvag
Area
Figure7-3. Lcatio of Sie 36 Brin 4 Moniorin Wello srigand Surface Soil SamplesSo Sipi
During augering, samples were collected at 5-foot intervals, beginning at land surface(LS), with a 3-inch outside diameter (O.D.) split spoon sampler. All samples wereI . ~~subjected to lead and base/neutral acid extractables (BNA) analyses. Photoionizationdetector (PID) readings were taken down~hole (except at land surface), on the split-spoonimmediately after retrieval, and of headspace (i.e., the unfilled space in a sample jar) ateach sampling point. Table 7-3 presents the PID readings at boreholes 36-1 and 36-2.Soils samples were selected for laboratory analysis for volatile organic compounds(VOCs) if they had a positive headspace reading of greater than 1 ppm abovebackground levels. If no positive readings were recorded at a borehole, then only thesample collected at the depth where groundwater was first encountered was sent forVOC analysis.
Acetone and methylene chloride were the only VOCs identified in soil samples from Site36. The presence of these compounds is considered to be a result of laboratorycontamination as discussed in Section 1.6.
The results of the lead and BNA analyses are shown in Table 7-4. Lead was found inall borehole soil samples collected at Site 36 but always at levels less than theabackground concentration range. The highest lead concentrations (10 to 11 mg/kg) were
Wfound at land surface (LS). This'lead contamination may be from exhaust from vehicles
operating on leaded fuels that have traveled Base roads over time. AD leadconcentrations in the other soil samples are below the lowest background level of 8mg/kg.
The only compounds identified in the BNA extractables analysis were two species ofphthalate. Varying concentrations of phthalate were found in samples from severalintervals in both wells. However, phthalates are common in laboratory stopcock greaseand the methods blanks also showed phthalate concentrations. In addition to thesubsurface soil samples,.two surface soil samples were collected. One sample (36SD-1)was taken from the former drum storage area and the other (36SD-2) was taken fromthe middle of the large area where yellow paint had been dumped.
Surface soil sample 36SD-1 was analyzed for pesticides and the following concentrationswere reported: 4,4-DDD at 15 ug/kg, 4,4-DDE at 80 ug/kg, and 4,4-DDT at 240 ug/kg.Background soil samples were not analyzed for pesticides and there are no regulatory. limits for the presence of these pesticides in soils.
10 Bi BI Bi B2 B2 B215 Bi BI Bi B2 B2 B220 Bi BI Bi B2 B2 0.125 Bi BK Bi B2 B2 B230 Bi NR NR B2 B2 B2
Notes:
Bi = background ]eve] of 2 ppm for boring 36-1B2 = background level of 0.2-0.3 ppm for boring 36-2NA = not applicable, no downhole reading prior to augeringNR = not recorded
7-10
TABLE 7-4. SITE 36 SOiL SAMPLE AND ASSOCIATEDFIELD BLANK ANALYSIS RESULTS
BNA Extractables (ugIkg)
* ~Sample Bis(2-ethyllhexyl) Di-n-octylNumber Lead (mg/kg) phthalate phthalate
NA =not analyzedLUO not detected; detection limit of 50 ugkgLI =not detected; detection limit of 5 ug/kgFB field blank
7-11
Surface soil sample 36SD-2 was analyzed for metals. This sample was collected whereapaint had been poured on the ground. Table 7-5 summarizes thee results of theVanalysis, which showed relatively high concentrations of several metals. While exposurestandards for soil do not exist, the concentrations of some of the metals may besufficiently high to exceed the Safe Drinking Water Act Maximum Contaminant Leve](MCLs) for the metals, if they were to partition to groundwater. Further, the fulllateral and vertical extent of the presence of the metals has not been determined.
7.2.3 -Groundwater
Both borings 36-1 and 36-2 were completed as monitoring wells. During drilling 125gallons of water were used in borehole 36-1 and 250 gallons of water were used inborehole 36-2 to maintain a hydrostatic head on heaving sands. In order to ensure thatthe water sampled from the wells was representative of the sites and not affected bythe introduced water, 1,500 gallons of water (%6 casing volumes) were pumped from well36-1 and 1,382 gallons of water (95 casing volumes) were pumped from well 36-2 duringdevelopment. An additional five casing volumes of water were purged from each wellprior to sampling.
Water level readings taken on September 22, 1996 showed a water table difference of0.43 feet from well 36-1 (531.01 feet AMSL) to well 36-2 (530.58 feet AMSL). Figure 7-5 shows the potentiometric surface at Site 36. The direction of flow conformed with aBase-wide north-northwesterly groundwater flow, while the magnitude (approximately 7feet per mile) reflects a gradual steepening of the potentiometric surface; possibly dueto drawdown from operational Base water supply wells to the northwest.
Both wells were sampled on September 25, 1986 for petroleum hydrocarbon oil andgrease, lead, oil and grease, total organic carbon JTOG), and volatile organic compounds(VOC). Table 7-6 presents the groundwater and corresponding QAIQC analysis resultsfor Site 36. Only oil and grease and TOC were detected in the Site 36 wells. The oiland grease concentration in well 36-2 was two to three times above backgroun dconcentrations, but since no petroleum hydrocarbon oil and grease was detected, the oiland grease concentrations are not likely to be the result of fuels contamination. TheTOG concentrations in the wells were within the background concentration range.
7-12
* ~~TABLE 7-5. SAMPLE 36SD-1 MEITALS ANALYSIS RESULTS (in mgtkg)
Metal Concentration
Antimony Li
Arsenic 24
Beryllium 1.4
Cadmium LP
Chromium 1,700
Copper 83
Lead 7,800
Mercury LQ
Nickel 450 ~~~~~~~Selenium 0.6
Silver LI'
T1hallium Li
Zinc 96
Notes:
LI =not detected; detection limit of 5 mg/kgLI'P not detected; detection limit of 0.5 mg/kgLQ =not detected; detection limit of 0.1 mg/kg
7-13
-44-
'-4- ~ ~ alag
NOSN-~~~~
'AMSL ~ I
I m- -
-F~~~~~~~~~~~~~~~Fe
7-14~~~~~~~~~~~~~~~~~~~~~~~~I
TABLE 7-6. SITE 36 GROUNDWATER AND CORRESPONDINGQA/QC ANALYSIS RESULTS
PetroleumSample Hydrocarbon 0il and Grease TOC LeadNumber Oil and Grease (mg/L) (mgfL) (ug/L)
(mgfL)
36-i Li Li 7.1 12
36-2 LI 1.0 13 L2BW-48 LI Li 3.9 12
FB-48 Li 0.4 1.8 12
BackgroundConc. Range LI-0.2 L1-0.4 6.0-34 5
. ~Notes:
Li = not detected; detection limit of 0.1 mg/LL2 = not detected; detection limit of 0.5 ug/LBW= equipment (bailer) washFB= field blank
7-15
7.3 SUMMARY AN) DECISION
7.3.1 Summar
Toluene and benzene were found in soil gas sample A05. However, they were not foundin either the sediments from the auger borings or the groundwater samples taken fromthe wells. A few soil gas samples showed moderate total hydrocarbon concentrations(> 10 ug/L), but the predominant hydrocarbon was methane, which is not an indicator offuels contamination. Trichloroethene was present in concentrations of 500 ug/L and 1.2ug/L in soil gas samples AA05 and BBO5, respectively. These samples were collectedjust east of Building 6209, which is used for vehicle/equipment maintenance. Since notrichioroethene was found in any of the auger baring soil samples or in groundwatersamples, the concentrations of trichloroethene may be localized and attributable todegreasing operations taking place, at Building 6209.
Lead was found in all of the auger boring samples collected at Site 36. Only leadconcentrations at land surface exceeded the lowest background ]evels and are attributedto exhaust from vehicles operating on leaded gas traveling on Base roads. Oil andgrease and total organic carbon (TOG) were the only parameters detected in thegroundwater samples. While the oil and grease concentration in well 36-2 was two tothree times the background levels, no petroleum hydrocarbon oil and grease wasdetected; therefore, the oils and grease are not likely to be the result of fuelscontamination. The TOG concentrations in the wells were within range of theupgradient background concentrations. TOC is not a definitive indicator of fuelscontamination.
One surface soil sample contained chromium and lead in concentrations in the thousandsof milligrams per kilogram. Another surface soil sample contained pesticides inconcentrations in the low hundreds of micrograms per kilogram. These concentrationsmay be sufficiently high to adversely impact local groundwater quality, although thisdetermination cannot be made solely on the basis of available data. Additional area]and vertical soil sampling and analysis and an assessment of the potential impacts ofthese concentrations on groundwater quality are warranted, If the site is found to posea significant threat to human health or the environment, limited remedial action, suchas removal of surface soils, may be warranted.
7-16
- ~7.3.2 Decsionh
* ~Data generated during the IRP Phase IV-A field investigation provides no significant* ~evidence of fuels contamination at Site 36. It is, therefore, apparent that fuel
compounds pose no threat to the environment or public health at Site 36. However,* ~metals concentrations from sample point 36SD-2 and possibly pesticide concentrations
from sample point 36SD-1 indicate a potential need for further investigation and possible* ~removal of contaminated surface sediments in this area.
T0
7-17
8.0 REFERENCES
CH2M Hill. 1982. Phase I, Installation Restoration Program Record Search for BEielsonAir Force Base, Alaska, CH2M Hill, November 1982, Document,, No. IRP-ATC-7801-V2.
CRC. 1977. Handbook of Chemistry and Physics. 58th Edition, R.C. Weast, Editor.The Chemical Rubber Co.
Dames and Moore. 1985. Installation Restoration Program, Phase II - ConfirmationlQu-antification Stage 1. First Draft Report for Eielson Air Force Base, Alaska.Document No. 7F33615-83-D-4002.
I-MTC (Hazardous Materials Technical Center). 1986. Statement of Work for Phase IV-A Remedial Action PlanjInstallation Restoration Program, Eielson Air Force Base,Alaska, June 1986. Document IRP-ATC-7801-X4.
U.S. Environmental Protection Agency. 1986. Superfund Public Health EvaluationManual. Office of Emergency and Remedial Response. EPAI54OI1-861060. October1986.
9-i
APPENDIX A-
Drilling Logs and Monitoring Well Construction Summariesr~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
BACKFILL SCHEDULE Formation:31.5'-3.26'BLS F:Bentonite Pellets:3.26'-2.26'ELS; Type I Port- I Tland Ceinent:Bentonite Powder (19:1) Grout:2.26'ELS-LS C:T
ISSIO-1.5' JDark brown (1OYR3/3); very fine to medium I BC-2-6-6
I I~sand, some coarse to very coarse sand Cguar-I Rec-O.99'
- I ~I Itz, trace mica), some very fine to medium I H±u(background)-0.2ppmI 1~pebbles (quartz, some grantics, sub-rounded I spoon)-bkg
I Ito well-rounded; sub-prismoidal to sub- ( headspace)-bkg
I Idiscoidal); trace silt; trace organic mat-
I lerial; slightly moist; loose.
ISS15-6.5' Dark grayish brown CXOYR4/2); very fine to IBC-.4-6-6I I~medium sand, some coarse to very coarse sandi RecO0.38'
I I(quartz, trace mafics), some silt, some veryl HNu(downhole)-bkg
I Ifine to coarse pebbles (quartz, some grani- I (spoon)-bkg
I Itics, trace mafics; sub-rounded to well I (headspace)-bkgF. ~~~~~rounded sub-prismoidal to sub-discoidal); I
I ~~Itrace organic material; slightly moist; II Iloose. I
SSIIO-11.5' jDark gray (lCYR4I1); medium to very coarse I BC-6-7-6
I isand, some very fine to fine sand (quartz, I Rec-1.05'
I I~trace mafics), some very fine to medium I HNu(downhole)-bkgI 1pebbles (quartz, granitics, trace mafic; I (spoon)-bkg
I I isub-rounded to well rounded; sub-prismoidal I (headspace)-l.2ppm
I Ito sub-discoidal), trace silt; saturated; I Water Table-10.51
I I loose.ISS115-16.5' IVery dark gray (2.5Y3/0); very fine to I BC-2-8-16
I I 1coarse, some very coarse sand (quartz, tracel Rec-1.2'
I ~~Imafics), some very fine to medium pebbles I Hflu~downhole)-bkgI I(quartz, granite, trace mafics; well-roundedi (spoon)-bkg
I I Ito sub-rounded; sub-prismoidal to sub-dis- I (headspace)-2.Oppm
I Icoidal), trace silt saturated; slightly II 1compact.I
W IENT ORNL PREPARED BY A. Johnson
LOCATION Eielson AEB SHEET I OF 2
PROJECT NO. 2-827-03-978-02 BORING NO. 16-1
A-2
FIELD LOG- .c-romw
DESCRIPTION COMMENTS
ISS120-21.5' IVery dark gray (1OYR3/l); fine to coarse IBC-8-6-5I Isand, very fine to coarse pebbles (quartz, Rec-0.86'
I 1~~granite, trace mafics, trace gneiss; sub- HNu(downhole)-bkg
I irounded to well rounded; sub-prismoidal tof (spoon)-bkgI I i sub-discoidal), some very fine sand, some (headspace)-1.4ppm
I I very coarse sand (quartz, some mafics),
I ~~trace silt; saturated; loose.
I I~~~~~~~~~~~~~~~~~~~~ISS125-26.5' IVery dark gray (I0YR3/1); medium to very j BC-16-27-0
F ~~~~coarse sand, very fine to coarse pebbles I Rec-1.0'I ~~~(quartz, granite, some mafic, trace schist; HNu(downhole)-bkg
I ~~~~well-rounded to sub-rounded; sub-prismoidal (spoon)-bkgI I ~~Ito sub-discoidal), some very fine to fine ( headsp'ace)-1.2ppm I
I ~I sand (quartz, trace mafic); saturated; IDid not complete blow cou-IIloose. I nt on split spoon because
I ~~~I I concern over cobbles.
ISS130-31.5' IVery dark gray (IOYR3/1); medium to very j BC-.2-3-5I ~~~coarse sand, very fine to coarse pebbles Rec-O.64'
I ~~I (quartz, some granite, trace gneiss, trace (downhole)-bkg
Imafics; sub-rounded to well-rounded; sub- (spoon)-bkgIprismoidal to sub-discoidal), some very finel (headspace)-1.8ppmIto fine sand (quartz, some mafics), trace
I ~~silt; loose; saturated.
CLIENT ORNL PREPARED BY A. JohnsonLOCATION Eielson AFB SHEET 2 OF 2PROJECT NO.- 2-827-03-978-02 BORING NO. 16-1
A-3
WELL CONSTRUCTION SUMMARY
BORING NO. 16-2
*DEPTH DRILLED 31.5'SCREENED
O FORMATION(S) Alluvium
PREPARED BY A. Johnson
CLIENT ORML STATIC WATER LEVEL______
LOCATION Eielson AFB 7.65'BLS (22 Sep 86/1621)
PROJECT NO. 2-827-03-978-02 DEVELOPMENT__________
TOP OF CASING ELEV. 540.52 GROUND ELEV. 537.88 Pumped: 1.7 hourB
E NORTH COORD. 228,791.892 -EAST COORD. 389,170.329 1530 gallons
DRILLING ___________ ___
DRILLER M. Lecorchick RIG TYPE Mobile B-61 _______________
START DATE 9-09-86 END DATE. 9-09-86 NUT TO SCALE-
BIT SCHEDULE 6"ID Hollow Stem AugerJ STICKUP 2.Z22 --
I SSIO-1.5' IVery dark grayish brown (2.5Y3/2); very fine! BC-4-6-8
I I Ito fine sand, some silt, trace medium Band I Rec-1.04'I I (quartz, some mica), trace very fine to med-I HNu(background)-O.4ppm
I jium pebbles (granite); slightly damp; corn- I Cspoon)-bkg
I 1pact. I (headspace)-3.3ppm
II IISSI5-6.5' IVery dark gray (2.5Y3/O) with streaks of I BC-5-5-6
I Idark reddish brown very fine to fine sand Rec-1.16'
I I~~(quartz, sorne mica) and silt, trace clay; HNu~downhole)-bkg
I I moist; compact; cohesive.I (spoon)-bkgI ~~~~~~~~II (headspace)-6.2ppm
SS1io-ii.5' IVery dark gray C2.5Y3/O); very fine to med- I BC-4-4-5. 1 h~~~jum sand, trace coarse and very coarse sand I Recl1.02'I(quartz, trace mica) trace silt, trace very I HNukdownhole)-bkg
I I If ine to fine pebbles (quartz; sub-rounded tol (spoon)-bkg
I Irounded; sub-discoidal to sub-prismoidal); I (headspace)-3.55ppm
I saturated; slightly cohesive. ijHit water table.
I IIISSI15-16.5' IVery dark gray (2.5Y3/O); very fine to medi-I BC-5-4-5
I I ~~~ur sand, some coarse to very coarse sand, I Rec-O.5I'I ~~~~(quartz, trace mica), some very fine to I HNu(downhole)-bkgI I ~~~medium pebbles (quartz, trace granite, trace! (spoon)-bkg
I ~~Imafic fragments; sub-angular to rounded; I (headspace)-3.2ppm
I ~~Isub-prismoidal to discoidal) trace silt; II I ~~~saturated loose.I
I I ~~II
I I ~~II
I ~~IIa ~~~~~II
W -LIENT ORNL PREPARED BY A. JohnsonLOCATION Ejelson AFE SHEET 1 OF 2-
PROJECT NO. 2-827-03-978-02 BORING NO. 20A-2
A- 10
FIELD LOG
F ~~~~~~~DESCRIPTION JCOMMENTS
ISS12O-21.5' fVery dark gray (2.5Y310); very fine to very I BC-9-6-8I 1coarse sand (quartz, trace mafic fragments), I Rec-0O.80'F land very fine to fine pebbles, trace medium IHNu(downhole)-bkg
I 1pebbles (quartz, some granite, trace gneiss;j (spoon)-bkg
I I sub-angular to rounded; sub-prismoidal to I (headspace)-bkg
I Isub-discoidal); saturated; loose.
ISS125-26.1' IVery dark gray (5Y3/1); very fine to very I BC-20-32-32
I I 1coarse pebbles (quartz, quartzite, granite, I Rec-0.8'I I isome gneiss, trace mafic fragments; sub- I HNu~background)-0.05ppmn
I langular to rounded; sub-prismoidal to sub- I (spoon)-bkg
I I discoidal some very fine to very coarse sandl (headspace)-0.5ppm
I I(quartz, trace mafic fragments); saturated; 12 very coarse granite and
I Iloose. Iquartzite pebbles in
I I Ispoon caused high blow
F I I count and iow recoveryI I ~~~~~~~~~~~~~~~land accounted for most of
F I ~~~~~~~~~~~~~i sample volume.
FSS130-31.5' lVery dark gray (5Y3/1); very fine to very I BC-.4-5-9F ~~~coarse sand (quartz, trace mafic fragments),J Rec-O.53'
I F ~~land very fine to fine pebbles, some medium I HNu(downhole)-bkgI F ~~~pebbles (quartz, some granite, some mafic I (spoon)-bkg
I F ~~fragments sub-angular to rounded; sub-pris- I (headspace).O.4pvm
I ~~Imoidal sub-discoidal); saturated; loose. I
CLIENT ORNL PREPARED BY A. Johnson
LOCATION Eielson AFB SHEET 2 OF 2
PROJECT NO. 2-827-03-978-02 BORING NO. 20A-2
A-li
WELL CONSTRUCTION SUMMARY
BORING NO. 20A-3
* DEPTH DRILLED 31.5'.CREENEDORMATION(S) Alluvium
PREPARED BY A. Johnson
CLIENT ORNL, STATIC WATER LEVEL______
LOCATION Ejelson AFB _______________
PROJECT NO. 2-827-03-978-02 DEVELOPMENT__________
TOP OF CASING ELEV. GROUND ELEV._ ____ Pumped: 1.25 hours
7 NORTH COOPD. EAST COORD._______ 1500 hours
DRILLING _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
DRILLER D. Sherburne -RIG TYPE Mobile B-61 ________________
START DATE 9-18-86 END DATE 9-18-86 Nff TO SCALE
BIT SCHEDULE 6"ID Hollow Stem Auger STICKUP 2.5-
DRILLING FLUIDS Water as necessary to maintainIII Ihead on heaving sands. I I1Li la
WATER ENCOUNTERED AT-approximately 9'BLS. 1 i 3.6'
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ L i ~~~~~~~~~~~~~~~~~~~~14.8-
I SSJO-1.5' jDark brown C1OYR3/3); fine to coarse sand, IBC-3-11-12I ~~some very fine sand, some very coarse sand IRec-0.73'F ~~(quartz, trace mica); some very fine to IHNu(background)-0.5ppm
I I ~~~medium pebble (quartz, same granitic, trace I (spoon)-bkg
I Imafic fragments; sub-angular to sub-rounded;I (headspace)-bkg
I I Isub-prismoidal to sub-discoidal); same II I lorganics (roots); slightly moist; loose. I
SSIS-6.5' lVery dark grayish brown (2.5Y3/2); medium tol BC-12-10-8
I I very coarse sand, some very fine to fine IRec-1.1'
I isand (quartz, trace mafic fragments, trace I HNu~downhole)-bkg
I unidentifiable green mineral) and very fine I (spoon)-bkg
I Ito medium pebbles (quartz, some granitic, I (headspace)-bkg
I I~some mafic fragments; sub-angular to round-I
I led; discoidal to sub-prismoidal);slightly II I~~moist; loose.I
Isslio-ii.5' lVery dark grayish brown (2.5Y3/2); fine to I BC-8-12-15
I I I very coarse sand, some very fine sand IRec-1.02'
I I (quartz, some mafic fragments, trace uni- I HNu(downhole)"bkgI Identifiable green mineral), trace silt, veryl (spoon)"'bkg
F Ifine to very coarse pebbles (quartz, gran- I (headspace)-bkgF
I l ite, trace mafic fragments, trace gneiss, I
I Itrace schist; sub-rounded to rounded; sub- I
I Iprismoidal to sub-discoidal); saturated; I
I lloose.I
SS 115-16.5' I Very dark gray (7.5YR3/O); medium to very I BC-8-12-30
lcoarse sand, some very fine to fine sand FIRec-1.24'
I I ~~~(quartz, some mafic fragments, trace mica); I HNu(downhole)-bkg
I I ~~~trace silt trace very fine to very coarse I (spoon)-bkg
I I ~~~pebbles (quartz, trace granite, trace mafic I (headspace)-bkg. 1 ~~~fragments; sub-angular to rounded; sub-pris-I
' LIENT- ORN~L PREPARED BY-A. Johnson
LOCATION Eielson AFB SHEET 1 OF 2
PROJECT NO. 2-827-03-978-02 BORING NO. 20B-2
A-18
FIELD LOG
I F ~~~~~DESCRIPTION ICOMMENTS
I ~~Imoidal sub-discoidal); saturated; loose. I
SS5120-21.5' lVery dark gray (2.5Y3/O); medium to very I BC-8-8-17I 1coarse sand, trace very fine to fine sand I Rec-0.88'
I ~~(quartz, some mafic fragments, trace uni- I HNu(downhole)-bkgI ~~Identifiable green mineral), some very fine (spoon)-bkg
I ~~Ito medium pebbles (quartz, granite, trace (headspace)-bkg
I Imafic fragments; sub-rounded to rounded; II I Isub-prismoidal to discoidal); saturated;
F I Iloose.SS125-26.5' IVery dark gray (5Y3/1); medium to very I BC'.15-20-22
I 1coarse sand, some very fine to fine sand; I Rec-1.0'I I (quartz, some mafic fragments); trace silt, I HNu(downhole)-bkgF I Itrace very fine to very coarse pebbles I (spoon)-bkg
I I quartz, granite, some mafic fragments; tracel (headspace)-bkgpF ~~schist, sub-angular to rounded; sub-pris- I
F I ~~Imoidal to discoidal); saturated; loose. I________________
SS130-31.5' IVery dark gray (5Y3/1); fine -o very coarse I BC-3-4-7F I isand some very fine sand (quartz, trace I Rec-0.6'I I mica, some mafic fragments), trace silt HNu(downhole)-bkg
F I Itrace very fine to coarse pebbles (quartz, (spoon)-bkg
F I Igranite granodiorite, some mafic fragments; (headspi~ce)-bkg
I SSIO-1.5' [Brown to dark brown (10YR413); very fine to JBC-3-3-6I ~~~~fine sand and silt, some medium sand, some Recl1.02'I [~~~very fine to medium Pebbles (quartz, some HNu(background)-Oppm
I I ~ ~ 1granite; sub-rounded to rounded; sub-pris- I (spoon)-bkgImoidal to sub-discoidal); trace coarse to (headspace)-bkg
I [~~very coarse sand (quartz, trace mica); some II I l~~organics; slightly moist; loose.I
I SS15-6.5' jDark brown C1OYR3/3); medium to coarse sand,I BC-6-8-7
I I [~~some very fine to fine sand, some very coar-j Rec-I.18'I ~~Ise sand (quartz_, trace mica, trace mafic I H~u(downhole)-bkgI ~~fragments); some very fine to coarse pebblesi Cspoon)-bkgI I~~(quartz, some granite, some mafic fragments;[ (headspace)-bkg
I isub-angular to well rounded; sub-prismoidal.
I ~~~Ito sub-discoidal); slightly moist; loose.
IssliO-ii.s' lVery dark gray (IOYR3/1); fine to coarse [ BC-7-14-14
I [~~~sand; some very fine sand, some very coarse I Rec-I.19'I I ~~sand (quartz, some mafic fragments, trace I HNu(downhole)-bkg
I I~~mica) some very fine to very coarse pebbles I (spoon)-bkgI lquartz, some granite, trace mafic fragmentsaj (headspace)-l.8ppm
I I~~sub-rounded to well rounded; discoidal to I[sub-prismoidal); saturated; loose.I
ISS[15-16.5' lVery dark gray (10YR3/l); very fine to me- I BC-2-3-4
Idium sand, some coarse to very coarse sand I Rec.'1.42'I [~~(quartz, trace mafic fragments); trace veryI HNu(downhole)-bkg
[fine to fine pebbles (quartz, trace mafic I (spoon)-bkgIfragments; sub-rounded to rounded; discoidal[ (headspace)-bkg
I Ito spherical); saturated; slightly compact. I
CLIENT ORNL PREPARED BY A. JohnsonLOCATION- Eielson AFB SHEET I OF 2PROJECT NO. 2-827-03-978-02 BORING NO. 20B-3
A-2 1
FIELD LOG
. 1~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~Oi.
I I ~~~~~DESCRIPTION ICOOIENTS
SS120-21.5' IVery dark gray (1OYR.3/1); fine to medium BC-16-12-30
I i~~sand, some very fine sand, sorne coarse to IRec.-1.01'I I every coarse sand (quartz, trace mica, some HNu(downhole)-bkg
I Imafic fragments); trace very fine to medium (spoon)-bkg
I I 1pebbles (granite, quartz, trace mafic frag- I (headspace)-bkgI Iments trace gneiss; sub-rounded to well-
I [rounded sub-prismoidal to sub-discoidal);
I saturated slightly cohesive.
SS125-26.5' lVery dark gray (10YR3/1); medium to very BC-2-1-1
I icoarse sand, trace to very fine sand Rec-0.96'
I [(quartz, some mafic fragments), trace very HNu(downhole)-bkg
I [fine to fine pebbles (quartz, some granite, (spoon)-bkgS I [~~~trace gneiss; some mafic fragments; sub- Cheadspace)-bkg
I~~~rounded to well-rounded; sub-prismoidal toF I Isub-discoidal); saturated; loose.
SS5130-31.5' IVery dark gray (10YR3/1); medium to very BC-4-4-9
I icoarse sand, some fine sand, some very fine R~ec-0.79'
I Ito fine pebbles (quartz, some mafics, trace HNu(downhole)-bkg
I I Igneiss, trace granitics; sub-angular to (spoon)-bkgI 1~~well-rounded; sub-prismoidal to discoidal);I (headspace)-bkg
I [trace very fine sand (quartz, some mafic
I 1fragments); saturated; loose.
Idh I11IEN R PRPRDBIA ono
PROECT N O. R87L 37802BREINGE BYO. Johnso
A-22
WELL CONSTRUCTION SUMMARY
BORING NO. 20C-1
DEPTH DRILLED 31.5'SCREENED
FORMATION(S) Alluvium
PREPARED BY A. Johnson
CLIENT ORNL STATIC WATER LEVEL_____
LOCATION Eielson AYEFB______________
PROJECT NO. 2-827-03-978-02 DEVELOPMENT__________
TOP OF CASING ELEV. 548.66 GROUND ELEV. 545.91 Pumped: 1.0 hour
NORTH COORD. 221,243.097 EAST COORD. 392,611.497 1800 gallons
DRILLING _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
DRILLER D. Sherburne RIG TYPE Mobile B-61 _______________
START DATE 9-22-86 END DATE 9-22-86 NOT TO SCALE
BIT SCHEDULE 6"ID Hollow Stem Auger STICKUP 2. 5' (approxj
DRILLING FLUIDS Water as necessary to maintain IIIhead on heaving sands.I
___________________________________________________I F "I 117
I SS1O-1.5' JDark grayish brown C2.5Y4/2); very fine to jBC-4-8-11I ~~fine sand, some silt, some medium sand, somel Rec-0.97'
I ~~coarse to very coarse sand (quartz, trace jHNu(background)-0.6ppmImafics, trace-mica), some very fine to (spoon)-bkg
I ~~~coarse pebbles (quartz, some granite, trace j headspace)-0.2ppm
Imafic fragments sub-angular to well-rounded;II ~~isub-prismoidal to sub-discoidal;) someI
I I l~~organics; slightly moist; loose.I
I ~~III SS15-6.5' 15.0-6.0': Dark olive gray (5Y3/2) very fineI BC-7-12-20
Ito coarse sand, some very coarse sand Rec-1.34'I ~~(quartz, some mafic fragment, trace mica); HNu(spoon)-bkg
Itrace silt, trace very fine to medium peb- (headspace)-0.5ppm. 1 ~~~Ibles (quartz; sub-angular to rounded; sub-
I I~~prismoidal to sub-discoidal); moist;compact.j
I F ~~6.0-6.34: very fine to very coarse sand, II ~~some very fine to medium pebbles (quartz,I ~~some granite, trace mafic fragments, trace
Imica; sub-angular to rounded; sub-prismoidall
I I Ito sub-discoidal); saturated; loose. I1I II
ISSjiO-ii.5' IVery dark gray (5Y3/1); medium to very coar-I BC-11-20-23I I Ise sand, some very fine to fine sand (quartzj Rec-1.54'I isome mafic fragments), some very fine to I HNu~spoon)-bkgI imedium pebbles (quartz, some mafic frag- (headspace)-0.8ppm
I iments, trace granite; sub-angular to round-
I ~~led; sub-prismoidal to sub-discoidal);
I isaturated; loose.
I I I
. IENT ORNL PREPARED BY A. JohnsonLOCATION- Eielson Afl HE 1OPROJECT NO. 2-827-03-978-02 BORING NO. 20C-1
A-24
FIELD LOG
I ~~~~~~DESCRIPTION ICOMMENTS
ISS5115-16.5' [Very dark gray (5Y3/1); medium sand, some IBC-11-20-22every fine to fine sand, some coarse to very IRecl1.43'lcoarse sand (quartz, trace mafic fragments; IHNu(spoon)-bkg
I I ~~some (40%) very fine to very coarse pebbles I (headspace)-0.5ppm
I I ~~land very fine cobbles (quartz, granite, II I Itrace mafic fragments; sub-prismoida1 to
I I sub-discoidal, sub-angular to rounded);
I I saturated; loose.
I SS120-21.5' IBlack (5Y2.5/1); coarse to very coarse sand,I BC-11-17-15
I- I~some very fine to medium sand-(quartz, some I Rec-0.65'I Imafic fragments); some very fine pebbles, IHNu(spoon)-6.2ppm
I Isome fine pebbles, trace medium pebbles I headspace)-Oppm
I I (quartz, trace granite, trade mafic frag- II Iments, trace gneiss; sub-angular to rounded;!
I ~~Isub-prismoidal to sub-discoidal); saturated;!
I ~~~loose.
I SSI2S-26.5' I(No recovery) BC-10-8-8
I I ~~~~~~~~~~Rec-O
I I ~~~~~~~~~~HNu(downhole)-5.2ppmI ~~~~~~~~~~~~~~ambient HNu is 3.Oppm
SS130-31.5' [Very dark gray (5Y3/1); very fine to very BC3-10-22-16
I i~~coarse sand (quartz, some mafic fragments), Rec-0.44'
[and very fine to fine pebbles, some medium HNu(spoon)-6.8ppm
lpebbles (quartz, granite, some mafic frags; (headspace)-Oppm
I ~~sub-rounded to well-rounded; prismoidal to lWhen taking HNu (spoon)
____ ___ ___ ____ ___ ___ ___ ____ ___ ___ ____ ___ ___ _ I TOTAL DEPTH L A i_____ ____ _____ ____ ____ _____ ____ _____ ____ ____DRILLED 30.0'
A-26
FIELD LOG
I I~~~~~~~~~~~~~~~~~K W
I I ~~~~~DESCRIPTION fCOMMENTS
I SS10-1.1' jDark gray (5Y411); silt and very fine sand; IBC-'3-4-4I ~~firm; non-plastic to slightly plastic; moisti Rec'-1.1'
I ~ ~ ~ II Nu(headspace)-0.Oppm
I I~ ~~
I SS15-6.0' jDark gray (2.5Y4/0); medium to coarse sand I BC-17-25-23I I land gravel, some pebbles, trace cobbles; I Rec-1.0'I I lloose; non-plastic; wet. I HNu(headspace)-0.OppmI II
ISSlio-io.8' IDark gray (5Y411); coarse gravel, some fine I BC-8-11-16I Ito medium sand, some pebbles, trace cobbles;I Rec-0.8'
I ~~isubangular to angular; loose; non-plastic; I HNu~headspace)-0.2ppmI lwet.I
ISS 115-16.1' O0.6'-Dark gray (N4/O); coarse gravel, some I BC-15-16-21I I pebbles, trace cobbles; subangular to an- I Rec-1.1'
I I I gular; loose; non-plastic; wet. I HNu(headspace)-0.OppmI I 10.5'-Dark gray CN4/O); fine to medium sand, II I I some pebbles; loose; non-plastic; wet. I
I ISS5120-20.8' jDark gray (5Y4/1) to very dark gray (5Y311);I BC-10-26-36
I I coarse gravel, some medium sand and pebbles ,l Rec-O.8'
I I trace cobbles (subrounded); angular to sub- I HNu(headspace)-O.2ppmI ~~rounded; loose; non-plastic; wet.
SS 125-25.6' ISame as above. IBC-32-22-16
I I Ikec-0.6'
I I I HNu(headspace)-0.2ppmISSI3O-30.4' IDark gray C5Y4/1) to very dark gray (5Y3/1);I BC-12-20-33
I I ~~~pebbles (subrounded), some coarse gravel and! RecO0.4'
I I ~~medium sand (subangular), trace cobbles; I HNu(headspace)-0.Oppm
I- SSjO.5-2.0' I Gray (2.5Y N5f ) to light yellowish brown I BC - 1, 2, 3~~~(5Y6/4); fine to medium sand, some silt;j Rec - 0.8'
[ 1 jc~~~rganic; loose; slightly plastic; moist. H Nu (headspace) - 0U.44 PPMf
I SS15.0-6.5 IDark gray (5Y 4/1); fine to medium gravel BC - 2, 4, 5Ijjj~~~snd medium to coarse sand (suba) (Bph); Rec - 0.4'
los;non-plastic; wet. I fl'u Cheadspace) - 0.4 ppm
SSI1O.O-11.5'I Dark gray (5Y 4/1); fine to medium gravel BC - 7, 5, 71 1and medium to coarse sand, (suba) (sph); Rec - 0.7'I Iloose; non-plastic; wet. HNu Cheadspace) - 0.6 ppinj
I II SS115.0-16.5j1 Dark gray (5! 4/1); medium to coarse sand; BC - 3, 7, 7
ISS12O.O-21.5'1 Dark gray -(5! 4/1); medium to coarse sand,I BC - 5, 5, 6.. j.Jj ubr to suba) (sph); loose; non-plastic; R ec - 1.2'
1 1wet.~~~~~~~~~~~~ HNu (headapace) - 0.60 ppml
I SS125.0-26.5'1 Dark gray (5! 4/1); medium to coarse sand BC - 3, 6, 6frjand fine gravel (subr) (sph); loose; non- R1c - 1.0'I .... L Lastic; wet. H Nu (headspace) - 0.4 ppmj
SSI3O.O-31.5'1 Dark gray (5Y 4/1); fine to medium gravel BC - 2, 7, 81 1and medium to coarse sand (suba-subr) I lec - 1.4'1 1(sph ~to sbd); loose; non-plastic; wet. IHNu (headspace)- 0.6 ppmj
TOP OF CASING ELEV. 539.01 GROUND ELEV. 537.00 Pumped: 1 hour
NORTH COORD. 228,565.959 -EAST COORD. 389,646.270 1500 gallons
DRILLING
DRILLER M. Lecorchick RIG TYPE Mobile B-61 _______________
START DATE 9-05-86 END DATE 9-05-86 N OT TO SCALE
BIT SCHEDULE 6"ID Hollow Stem Auger STICKUP 1.46' -
DRILLING FLUIDS Water as necessary to maintainJJIhead on heaving sands.j
I A1 12.7'WATER ENCOUNTERED AT approximately 7 'ELS f1W I
I 13I 7aCONSTRUCTIONj
CASING SCHEDULE___________________ I I0.01"Slot 4'ID Sched. 40 PVC Screen:30.44-5.28'BLS I I 1.84'ID Sched. 40 PVC Piser:5.28EBLS-1.46'ALS F:6"ID Protective Steel Casing:3.99'BLS-2.0l'A.LS I -I
BACKFILL SCHEDULE Formation:31.5-3.7'BLS F4 -Bentonite Pellets:3.7-2.7'BLS; Type I Portland FT 1Cement:Bentonite Powder (19:1) Grout:1.7'BLS-LS FI `GEOPHYSICAL LOGS None F4 cI
COMMENTS- Used 125 gallons of water while drilling. FI I
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _T O T A L D E P T H L . . J________ ________ ________ ________ ________ ________DRILLED 31. 5'
A-37
FIELD LOG
I I ~~~~~~DESCRIPTION jCOM2'ENTrS
L.5J11.5L....J.ark brown (.10YR(4/3); very fine to coarse jBC-2-2-5ffiJA~lsda(quartz, some muscovite). silt, trace JRec-1.11'
-. ~i..............Icl±ar trace very fine Pebbles (guartz);some IHNU(background)-2ppm~~~~~lrai material;_ damp, cohesive, slightly I (spoon)-bkg
I 1compac. I (headspace)-bkg
IjSS15-.5' Jy eyy dark gray (10YR3/1); fine to coarse I BC-3-6-9I I Isand, some very coarse sand, (quartz, trace j Rec-0.79'.LJ~~~maics), some very fine to coarse pebbles- I HNU(downho-le)-bkg
I......jz izartz, sub-prismoidal to spherical sub- I (spoon)-bkgjJirounded to well rounded), trace silt; damp, I (headspace)-bkgI slLghtly cohesive. I Water level approx. 7V.
SS11-115' Very dark gray (10YR3/1); fine to medium I BC-S-1b-1__L ___Lsandsome very fine sand,-some coarse sandI RecO0.65'
IjI 1(partz, trace mafics, trace feldspar); somelI HNU(downhole)abkgI jI Is.t; pebble layer at bottom of spoon 0.15' (spoon)-bkgjJIIt.ck: same as above with some very fine to (headspace)-bkg
I Ifirie pebbles (quartz); saturated, slightly
Ij coiesive.
I I5SS115-16.5' IVery dark gray (10YR3/1); medium to coarse BC-4-3-5
I isand, some very fine to fine sand, some veryl Rec-0.75'I Js~1oarse sand (quartz, trace mafics), trace I HNU(downhole)-bkg
Isl;very fine to coarse pebbles (quartz, I (spoon)-bkgjJ1 . 2 Isoe mafics, some granitics; sub-rounded toI (headspace)-bkg
j J~~~1el rounded; sub-prismoidal to sub-dis- I
I. .J~coid-al);, saturated; loose.I
II~~~~
_________________ORN_________ PREPARED BY A. Johnson
6"ID Protective Steel Casing:3.23'BLS-2.77'ALS~ a IBACKFILL SCHEDULE, Formation:31.5-4.O'BLS : 1Bentonite Pellets:4.0'-2.5'BLS; Type I Portland aEgjCement:Bentonite Powder (19:1) Grout:2.5'BLS-LS zGEOPHYSICAL LOGS None E I
aTCOMMENTS Used 250 gallons of water while drilling. 7I
I TOTAL DEPTH ZI_______ _______ ______ _______ ______ _______ _____I CASED 30.3' =
_______ _______ _______ ______ _______ _______ ______ TOTAL DEPTH I II
j~~~j ~ isme very fine to fine pebbles; trace mediumi
t coarse pebbles (quartz, trace mafic, IIjjss ace granitic; sub-rounded to rounded; sub-i
I 1prismoidalto sub-discoidal); saturated;
C~~IIISS115-16.5' Very dark gray (7.SYR3/0); fine to very BC-10-5-7
L I....L.......c......sarse sand-, trace very fine sand, trace Rec..O.84'L...I... il~t (quartz, some mafics); very fine to j NUdownhole)-bkgIjJcarse pebbles (quartz, some granitic, trace I (spoon)-bkgIjI fic; sub-rounded to rounded; sub-prismoid-j (headspace)-bkg
ffiJ! 2la to sub-discoidal.
SSI20-21.5 IVery dark gray (7.5YR3/O); fine to very I BC-4-1O-11Ijcoarse- sand-, trace very fine sand (quartz, I Rec-0.68'JjIsme mnafics, trace mica); trace silt; some I HNu~downhole)-bkgIjjvery fine to coarse pebbles (quartz, some I (spoon)-bkg
JI 19 Jzanite to granodiorite, trace schist; sub- I (headspace)-O.IppmJj~~irunded to rounded; sub-prismodial to sub-
Idisoidl);saturated; loose to slightlyW1.....Jcohesive
JW IENT ORNL_______________________ PREPARED BY Johnson
Ssj 25-26.5 IPossibly some or all of sample is heave; I BC-2-3-4
I I every dark gray (7.5YR310); very fine to I Rec-0.43'
I I imedium sand, trace coarse to very coarse I HNu(downhole)-bkg
I I sand/quartz, some maidis, trace mica); some I (spoon)..bkg
I I Isilt; trace very fine to fine pebbles I (headspace)-bkg
I I lquartz); some clay at bottom of split spoon II l(last 0.2'), clayey portion is cohesive and II lplastic, rest is slightly to very cohesive; II saturated.I
SIss 30-31.5 jDark gray (7.5YR410); medium to very coarse I BC-19-10-10I Isand; trace very fine to fine sand (quartz, I Rec-0.46
I I some mafics); some very fine to coarse I HNu(downhole)-bkg
I ~~pebbles (quartz, some queiss, some granitic/I (spoon)-bkg
I I~~~granodiorite, trace mafic; sub-rounded to I (headspace)-bkg II I i~~well-rounded; sub-prismoidel to sub-
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