0

CAMBRIA.. April 9, 1998

Mr. Bob GondekChevron Products Company6001 Bollmger Canyon Road, Building LSan Ramon, California 945 83-0804

Re: Report of Field Activities andBioremediation MonitoringFormer Chevron Bulk Fuels Facility #100-1425302 Main StreetCraig, AlaskaCambria Project #31-718

Dear Mr. Gondek:

Cambria Environmental Technology, Inc. (Cambria) is pleased to present this report summarizingsampling and remediation system operation and maintenance (O&M) activities at the above-referencedsite. Site activities were conducted in conjunction with MG Environmental Management, Inc.(AIGEM) investigation field activities. Presented below is a site summary, our scope of work, and ourconclusions.

SITE SUMMARY

This former Chevron Facility is located on Main Street in Craig, Alaska, on the western shoreline ofPrince of Wales [sland (Figure 1). Records indicate that Chevron Products Company (Chevron)constructed the site bulk fuels facility in the 1930’s, and operated the facility until 1986. The facilityhas been operated by various organizations since, and is now operated by Harbor Enterprises d.b.a.Petro Marine.

CA \t BR! A

Site History: Various site investigations have been conducted, including the installation of twelveE\\ IRO\N1ETAL

monitoring wells and numerous soil borings. A vapor extraction system operated on site from 1989 to

TECHNOWG’, 1c. 1992. In 1989, a water treatment unit consisting of an oillwater separator and an air stripper were also

installed to treat ground water draining from the tank farm area. In 1989, separate phase hydrocarbons1144 b5TH STREET, were noted in one monitoring well. Ben.zene and total recoverable petroleum hydrocarbons have been

SITE B detected in ground water at up to 12,000 parts per billion (ppb) and 35,000,000 ppb, respectively.

Hydrogeologic Setting: The site subsurface is reported to consist of poorly graded gravel and sand.

CA 46O8 The site topography slopes north, from the tank farm toward Bucareli Bay. Ground water flow direction

is anticipated to follow the site topography, and historical data reports ground water lying1’H. (5iO 420-0700 approximately 2 to 8 ft below grade.

F\: 510) 12O.1 70

• 0 0Mr. Bob GondekApril 9, 1998 LAMBRIA

SCOPE OF WORK

Our objective was to investigate and halt a leaking drainage pipe feeding into the site remediation system.In addition, Cambria was to sample selected temporary monitoring wells installed by AIGEM and installlocking caps on the existing site wells. Mr. Bergstrom of Ca.mbria conducted site activities September 10,11, 13, and 14, 1997.

Site Maintenance: The leaking pipe was a conveyance pipe (3-inch diameter schedule 40 PVC) whichcarried water from a French drain within the southern (older) containment area to a water storage tank forthe air stripper. The pipe runs below grade for all but the lowest six feet, nearest the air stripper. The leakwas from a valve, located in front of the storage tank. The other end of the pipe, within the southerncontainment area, could not be uncovered and plugged because the screened area at the top of the pipe wastoo large and was buried under a significant volume of rock and soil.

After draining water from the pipe, the leaking valve was removed and a capping assembly was placed onthe pipe, stopping any further leaking. The drained water was stored in drums on site with AIGEM’s purgewater, to be included in the site operator’s waste water treatment system. Additional water was drained intothe remediation system holding tank. A 4”x4” wood support was installed to support the lowest end of thepipe. The leak was stopped using available pipe and fittings (a 3-inch hubless coupler, a 4-inch hublesscoupler, a length of 4-inch ABS pipe, a 4-inch ABS female adaptor, and a 4-inch ABS male plug), and thosefittings are expected to remain secure for several years. We recommend eventually removing those fittingsand solvent welding a 3-inch PVC slip end cap to the end of the pipe. This would provide a more permanentsolution, but would require draining the conveyance line and French drain again.

Water Sampling: Cambria sampled site wells in accordance with the “Protocol for Monitoring IntrinsicBioremediation in Ground Water” published in 1995 by Chevron Research and Technology Company.Health, Environment, and Safety Group. Cambria’s ground water data is presented in Table 1. The AIGEMground water data is included as Attachment 1.

All monitoring wells sampled were purged manually using hand bailers. During purging, the ground watertemperature, pH, conductivity, dissolved oxygen (DO), and oxidation-reduction potential (ORP) weremeasured. These measurements were taken ex situ for monitoring wells, and were not taken on temporarywells since AIG purged these wells prior to Cambria’s sampling.

Due to the combination of a 48-hour hold time on some samples’ analyses and the remoteness of the site, allwells were sampled on two consecutive days. On the first day, alkalinity, sulfate, and ferrous iron sampleswere collected. Nitrate samples were collected during the second day of sampling.

2

Mr. Bob GondekApril 9, 1998 AIVIBRIA

Locking Cap Installation: Locking well head caps were placed on all monitoring wells located, and lockedwith standard Chevron padlocks. Wells MW-iC, MW-2, MW-8, and MW-9 were not located. Although acap and lock were placed on well MW-l, the top of the casing was cracked, preventing a secure seal. Dueto a lack of survey equipment, the well head was not modified.

RESULTS

Using Cambria’s and AIGEM’s data, we have assembled isoconcentration maps for TPHd in soil, TPHg insoil, TPHd in ground water, TPHg in ground water, nitrate, sulfate, and ORP. These are presented as Figures2 through 8, respectively.

Extent ofPetroleum Hydrocarbons: The highest concentrations of TPHd in soil are located in the two aboveground storage tanks (AST) containment areas and the soils immediately down slope (north) of the ASTs.Decreasing concentrations extend approximately 150 ft in the presumed ground water flow direction (north).toward Bucareli Bay. This is consistent with the tank farm being the source area, and a dissolved plumehaving migrated slightly down gradient. From this map, we estimate that within 100 ft downgradient of thetank farm soil concentrations of TPHd fall below 200 parts per million (ppm). The upgradient extent of theTPHd plume (above 200 ppm) is defined by the September. 1997 data.

AIGEM reported low concentrations of TPHg in soil samples taken from three soil borings. These sampleswere all from locations on the northern edge of the southern (older) containment area (Figure 3). The extentof TPHg in soil samples collected in September 1997 is confmed to the vicinity of AST containment areas.

The highest concentrations of TPHd in ground water correspond to the areas with the highest concentrationsof TPH d in soil (Figure 4). Concentrations of TPHd decrease in the downgradient direction. Although notdelineated in the up- or crossgradient direction in this round of sampling, previous ground water samplinghas provided delineation to the west (B95-3) and decreasing concentration in the upgradient direction(B95-l).

Concentrations of TPHg in ground water are limited to the two AST containment areas and an areaimmediately down slope (north) of Tank 11 (Figure 5). TPHg was not detected in samples to the north, south.east, and west of the dissolved TPHg plume.

Biological Parameters: Isoconcentration maps for nitrate, sulfate, and oxygen reduction potential (ORP)are presented as Figures 6 through 8, respectively. Interpretation of these maps is presented below. Nitratesand sulfates were analyzed as indicators of anaerobic biodegradation of the hydrocarbon plume. ORP wasanalyzed to assess how oxidizing the subsurface environment was through a cross section of the hydrocarbonplume.

3

Mr. Bob GondekApril 9, 1998 AMBRIA

Nitrates: Nitrates serve as both nutrients and electron acceptors for subsurface bacteria. Typically presentat concentrations of a few ppm, nitrates in shallow ground water originate from human and animal wastes.the decay of organic materials, and artificially applied fertilizers. In areas of little biological activity, nitrateconcentrations remain fairly uniform in both the down- and crossgradient directions. When nitratecontaining ground water flows through a biologically active zone, the nitrates are consumed as nutrients(building blocks of the biomass) and as electron acceptors. As shown in Figure 6, the nitrateisoconcentration map, dissolved nitrates in ground water are lower within the petroleum hydrocarbon plumethan in areas further downgradient and lateral from the source area. These maps also indicate that nitrate andsulfate are being reintroduced to the nitrate- and sulfate-deficient ground water at relatively highconcentrations.

Sulfates: Sulfates also serve as both nutrients and electron acceptors for subsurface bacteria. Thedistribution of sulfates typically parallels that of nitrates for the same reasons stated above - they areconsumed within the biologically active area of the plume. Figure 7 shows greatly decreased sulfateconcentrations (more than 100-fold) in the areas of highest TPH concentrations in soil and ground water.Sulfate concentrations partially rebound downgradient of the plume (presumably due to mixing of desulfatedground water present with ground water which passed to the sides of the hydrocarbon plume). Sulfatesmeasured at 522 ppm in well TW-1 are assumed to reflect minerals present in seawater and were notcontoured.

Oxygen Reduction Potential: Both oxidizing and reducing processes occur in the subsurface, dependingon soil chemistry, contaminates, and, especially, biological activity. Reducing conditions, yielding negativeORP values, may indicate areas where anaerobic biodegradation is occurring. All of the measured ORPlevels were positive, indicating oxidizing conditions. However, the ORP isoconcentration map shows lowerORP levels in and near the plume than levels further from the plume. This small decrease in ORP isconsistent with the small decrease in DO (discussed below) and indicates that biodegradation is occurringprimarily aerobically, rather than anaerobically.

Dissolved Oxpgen: DO was measured in ground water within and outside of the hydrocarbon plume.Concentrations of DO were about 1 ppm lower in the center of the plume (MW-l), but high in all groundwater measured. This indicates that while DO is being consumed with the hydrocarbon plume, it is not alimiting factor for biological activity at this site with shallow ground water. The shallow depth to waterallows a greater rate of oxygen diffusion into the ground water than at deeper sites. Also, the relatively coldground water has a greater ability to dissolve oxygen.

4

o 0Mr. Bob Gondek

CAMBRIA

CONCLUSION

The September 1997 field work, sampling and subsequent analysis have accomplished the following:

• Stopped the leak in piping which led from the French drain in the southern AST containment area;• Documented the biological activity occurring in the center of the hydrocarbon plume; and• Identified the parameters currently limiting the rate of biodegradation of petroleum hydrocarbons.

CLOSING

We appreciate the opportunity to provide consultant services to Chevron. Please call if you have anyquestions or comments.

Sincerely,Cambria Environmental Technology, Inc.

David B. ThomasSenior Engineer

Attachments:Figure 1 - Site PlanFigure 2 - Ground Water Benzene Isoconcentration MapFigure 3 - Ground Water TPHg Isoconcentration MapFigure 4 - Ground Water TPHd Isoconcentration MapFigure 5 - Soil Benzene Isoconcentration MapFigure 6 - Soil TPHg Isoconcentration MapFigure 7 - Soil TPHd Isoconcentration MapFigure 8 - Dissolved Nitrate Sulfate Isoconcentration MapFigure 9 - Dissolved Sulfate Isoconcentration MapFigure 10 - Oxidation-Reduction Potential Isoconcentration MapTable 1 - Field and Laboratory Bioremediation ParametersAttachment A - AIGEM Analytical Data

D:\Projeet Files\Chevron-AK\1001425\Report.wpd

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. :. CAMBRIA FIGURE. Environmental Technology, Inc. Wards Cove Bulk Fuel Facility Oxidation-Reduction Potential

: :‘‘: :1 : 302 Main Street Isoconcentration Map

•:

Craig, Alaska September, 1997

.0:IPROJECTICHEVRQN-AK\1251425\ORP.DWG

Scale (ft)

CAMBRIAField and Laboratory Bioremediation Parameters - Former Chevron Bulk Fuels Facility 1001425, Wards Cove Packing Company, Former Chevron Bulk Fuels Facility, Craig, Alaska

Sample Date Pre-Purge DO Post-Purge DO Pre-Purge ORP Post-Purge ORP Alkalinity Ferrous Iron Sulfate Nitrate-NitrogenID Sampled (mg/L) (mg/L) (mV) (mV) (mg/L) (mgfL) (mgfL) (mgfL)

TW-1 9/14/97 --- 13.65 --- 191 216 <0.00500 522 0.770

TW-2 9/11/97 --- 14.79 --- 73 275 <0.00500 92.8 1.16

TW-3 9/11/97 --- 15.01 --- 59 155 <0.00500 51.2 2.73iv

MW-i 9/11/97 15.99 13.89 40 42 110 0.0101 <0.100 <0.0500

MW-S 9/14/97 13.8 15.05 125 87 149 0.0198 11.9 0.0910

MW-6 9/11/97 4.73 15.88 70 35 177 <0.00500 22.7 0.127

MW-12 9/14/97 14.55 14.99 146 115 139 <0.00500 5.65 0.0520

Abbreviations/Notes:

DO = dissolved oxygenORP = oxidation-reduction potentialmg/L = milligrams per litermV = millivolts

= not measured

Samples analyzed by North Creek Analytical Services

F:\PROJECT\SHELL’LJNI3 I 3(1 I\REPORTS\Analy(ics. XLS

o 0CAMBRIA

Attachment A

AIGEM Analytic Data

Table 1: Groundwater Monitoring DataWards Cove Tank Farm Facility, Craig, Alaska

Well Date Depth to Temperature Conductivity pH CommentsMonitored Groundwater (Fahrenheit) (a)

SB-4 10-Sep-97 2.70 56 110 7.6 SheenobservedSB-5 10-Sep-97 2.20 55 290 7.8 Sheen observedSB-6 10-Sep-97 2.00 61 176 6.2 Sheen observedSB-7 10-Sep-97 2.10 57 213 7.9SB-9 10-Sep-97 2.20 59 185 6.9 Sheen observedSB-10 10-Sep-97 2.20 56 186 7.5 Sheen observedSB-il 10-Sep-97 3.00 56 288 7.5 Sheen observedSB-12 10-Sep-97 -- -- -- -- No groundwater yieldSB-13 10-Sep-97 5.00 55 303 8.4SB-14 10-Sep-97 -- -- -- -- NogroundwateryieldSB-15 10-Sep-97 4.40 56 131 7.5 Sheen observedSB-16 10-Sep-97 4.65 55 212 7.6 Sheen observedSB-17 10-Sep-97 -- -- -- -- No groundwater yieldSB-18 10-Sep-97 1.60 58 21 6.7SB-19 10-Sep-97 -- -- -- -- No groundwater yieldSB-20 10-Sep-97 -- -- -- -- No groundwater yieldSB-21 10-Sep-97 -- -- -- -- No groundwater yieldMW-li 11-Sep-97 NM NM NM NMMW-13 11-Sep-97 NM NM NM NM

(a) microsiemens per centimeterNM Not measured-- Well did not yield sufficient groundwater to monitor or sample

Table 2: Soil Laboratory Analytical Results

Benzene Toluene Ethylbenzene Xylenes MTBE

Wards Cove Bulk Fuel Facility, Craig, Alaska

Sample Collected TPI-I-D TPH-GSB1:0’-0.5’ 11-Sep-97 190 ND<10 ND<0.005 ND<0.005 ND<0.005 ND<0.005 ND<O.005SB2: 0’-0.5’ 11-Sep-97 170 ND<10 ND<0.005 ND<0005 ND<0.005 ND<0.005 ND<0.005S83: 0’-0.5’ 1 1-Sep-97 44 ND<10 ND<0.005 ND<0.005 ND<0.005 ND<0.005 ND<0.005SB4: 0.5’-l’ 10-Sep-97 590 ND<10 ND<0.005 ND<0.005 ND<0.005 ND<0.005 ND<0.005S84: 2.5’-3’ 10-Sep-97 390 ND<10 ND<0.1 ND<0.1 ND<0.1 ND<0.1 ND<0.1SB5: 0.5’-l’ 10-Sep-97 350 ND(10 ND<0.1 ND<0.1 ND<0.1 ND<0.1 ND<0.1SB5: 2.5’-3’ 10-Sep-97 6,800 ND<10 ND<0.005 ND<0005 ND<0.005 ND’zO.005 ND<0.005SB6: 0.5’-l’ 10-Sep-97 630 ND<10 ND<0.005 ND<0.005 ND<0.005 ND<0.005 ND<0.005SB6: 2.5’-3’ 10-Sep-97 49 ND<10 ND<0.005 ND<0.005 ND<0.005 ND<0.005 ND<0.005SB7: 2.5-3’ 10-Sep-97 35 ND<10 ND<0.005 ND<0.005 ND<0.005 ND<0.005 ND<0.005SB9: 0.5’-l’ 10-Sep-97 11,000 100 ND<0.1 ND<0.1 ND<0.1 2.9 ND<0.1SB9: 2.5’-3’ 10-Sep-97 14,000 200 ND<0.1 0.3 0.6 11 ND<0.1SB1O: 0.5’-l’ 10-Sep-97 14,000 500 ND<0.1 0.5 0.3 2.4 ND<0.1SB1O: 2.5’-3’ 10-Sep-97 7,800 100 ND<0.1 ND<0.1 0.1 0.8 ND<0.1SB11: 0.5’-l’ 10-Sep-97 2,800 80 ND<0.1 ND<0.1 0.2 1 ND<0.1SB11: 2.5’-3’ 10-Sep-97 4,400 500 0.2 ND<0.1 1.5 8.8 ND<0.1SB12: 2.5’-3’ 10-Sep-97 ND<10 ND<10 ND<0.005 ND<0.005 ND<0.005 ND<0.005 ND’zO.005SB13: 3’-3.5’ 9-Sep-97 ND<10 ND<10 ND<0.005 ND<0.005 ND<0.005 ND<0.005 ND<0.005SB14: 0’-0.5’ 9-Sep-97 3,800 ND<10 ND<0.005 ND<0.005 ND<0.005 ND<0.005 ND<0.005SB14:4.5’-5’ 10-Sep-97 110 ND<10 ND<0.005 ND<0.005 ND<0.005 ND<0.005 ND<0.005SB15: 3.5’-4’ 9-Sep-97 1,300 ND<10 ND<0.1 ND<0.1 ND<0.1 ND<0.1 ND<0.1SB16: 4’-4.5’ 9-Sep-97 300 ND<10 ND<0.005 ND<0.005 ND<0.005 ND<0.005 ND<0.005SB17: 3.5’-4’ 9-Sep-97 88 ND<10 ND<0.1 ND<0.1 ND<0.1 ND<0.1 ND<0.1S618: 2.5’-3’ 10-Sep-97 320 ND<10 ND<0.1 ND<0.1 ND<0.1 ND<0.1 ND<0.1SB19: 2.5-3’ 10-Sep-97 ND<10 ND<10 ND<0.005 ND<0.005 ND<0.005 ND<0.005 ND<0.005SB2O: 2.5’-3’ 10-Sep-97 55 ND<10 ND<0.005 ND<0.005 ND<0.005 ND<0.005 ND<0.005SB21: 2.5-3’ 10-Sep-97 33 ND<10 ND<0.005 ND<0.005 ND<0.005 ND<0.005 ND<0.005SB23:0.5-1’ 11-Sep-97 ND<10 ND<10 ND<0.005 ND<0.005 ND<0.005 ND<0.005 ND<0.005

Table 2: Soil Laboratory Analytical ResultsWards Cove Bulk Fuel Facility, Craig, Alaska

TPHG = Total petroleum hydrocarbons as gasolineTPHD = Total petroleum hydrocarbons as dieselAll results in miliigrams per kilogramNA = Not analyzedND = Not detectedTPHG and STEX analysis by USEPA Method 8260 and GC/MS combinationTPHD analysis by GCIMS combination (extracted by USEPA Method 3510)TPHD analytical range is C8-C40Samples analyzed by Zymax Envirotechnology in San Luis Obispo, California

Table 3: Groundwater Laboratory Analytical ResultsWards Cove Bulk Fuel Facility, Craig, Alaska

Sample Collected TPHD TPHG Benzene Toluene Ethylbenzene Xylenes MTBE*

SB4 10-Sep-97 NA ND<50 ND<0.5 ND<0.5 ND<0.5 2.8 ND<0.5

SB5 10-Sep-97 NA ND<i00 ND<1.0 ND<i.0 ND<1.0 ND<i.0 ND<i.0

SB6 10-Sep-97 3,100 1,000 7.3 3.9 1.4 7.1 3.1

SB7 10-Sep-97 NA ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<0.5

SB9 10-Sep-97 NA 2,000 2.9 13 25 240 ND<2.0SB1O 10-Sep-97 NA 3,000 32 29 9.9 58 ND<2.0SB11 10-Sep-97 10,000 5,000 160 9.3 41 210 ND<2.0SB13 10-Sep-97 ND<i00 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<0.5SB15 10-Sep-97 48,000 ND<i00 ND<1.0 ND<i.0 ND<1.0 ND<1.0 ND<i.0SB16 10-Sep-97 NA 10,000 13 2.4 4 21 ND<2.0SB18 10-Sep-97 280 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<0.5SB21 10-Sep-97 NA ND<50 NDc0.5 0.7 ND<0.5 ND<0.5 ND<0.5SB22 11-Sep-97 150 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<0.5SB23 11-Sep-97 250 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<0.5MW-li 11-Sep-97 130 ND<50 ND<0.5 1.1 ND<O.5 ND<0.5 ND<0.5MW-13 11-Sep-97 160 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<0.5Air StripperPiping 9-Sep-97 910 210 4.6 0.5 0.9 0.9 ND<0.5

Surface WaterAir Stripper 9-Sep-97 1,100 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<0.5

TPHD = Total petroleum hydrocarbons as dieselTPHG = Total petroleum hydrocarbons as gasolineAll results in micrograms per literND = Not detectedNA = Not analyzed because sample destroyed in transit to laboratoryTPHG and BTEX analysis by USEPA Method 8260 and GC/MS combination

TPHD analysis by CC/MS combination (extracted by USEPA Method 3550)MTBE = Methyl-t-Butyl EtherSamples analyzed by Zymax Envirotechnology in San Luis Obispo, California

Table 4: Breakdown of Soil Analytical Results by Carbon Chain RangesWards Cove Bulk Fuel Facility, Craig, Alaska

Sample Date C6-C10 C6-C10 C6-C10 C10-C25 C10-C25 C10-C25 C25-C36 C25-C36 C25-C36Number Collected TPH Aliphatic Aromatic TPH Aliphatic Aromatic TPH Aliphatic Aromatic PNAs

SB5: 2.5’-3’ 10-Sep-97 ND<10 ND<10 ND(10 6,680 5,344 2,672 120 108 36 NDSB9: 0.5’-l’ 10-Sep-97 100 70 50 10,500 8,400 4,200 500 450 150 NDSB9: 2.5’-3’ 10-Sep-97 200 140 100 13,500 10,800 5,400 500 450 150 8.9 (a)SB1O: 0.5-1’ 10-Sep-97 500 350 250 13,800 11,040 5,520 200 180 60 NDSB1O: 2.5’-3’ 10-Sep-97 100 70 50 7,710 6,168 3,084 90 81 27 NDSB11: 0.5’-l’ 10-Sep-97 80 56 40 2,760 2,208 1,104 40 36 12 NDSBI1: 2.5’-3’ 10-Sep-97 500 350 250 4350 3,480 1,740 50 45 15 NDSB14: 0’-O.S’ 9-Sep-97 ND<10 ND<10 ND<10 3,260 2,608 1,304 540 486 162 NDSB15: 3.5’-4’ 9-Sep-97 20 14 ND<10 1,230 984 492 70 63 21 ND

Shaded concentrations are those that exceed ADEC Soil Cleanup Standards (Table B from Draft Cleanup Standards dated 11/12/97assuming migration to groundwater and over 40 inches annual rainfall)

All results in milligrams per kilogramTPH = Total petroleum hydrocarbonsPNAs = Polynuclear aromatic hydrocarbonsND = Not detected (listed with laboratory method detection limit)Results reported by Zymax Envirotechnology in San Luis Obispo, California(a) Naphthalene

The following percentages were used to break down the TPH into aliphatic and aromatic composition:

Carbon Range Percent Aliphatic Percent AromaticC6-C10 70 50

C10-C-25 80 40C25-C36 90 30

Sent By: AIGCEM SAN DIEGO 6194971156; Aug-1-00 14:10; Page 1

0

Environmental ManagementA Division of AIG Consultants, Inc.3090 South Bristol Street, Suite 600Costa Men, California 92626Direct DIal: (714) 435-6654

A Member Gompany ofFax (714) 435-6624 Arnericn lrnernat2onal Ooup,Inc.December 2, 1999 —

Mr. Jan SuplerWards Cove Packing Company98 E. Iiarnlin StreetSeattle, Washington 98105-0030

RE: Review of Canabria Environmental Technology, Inc.’s Report of FieldActivities azid Bioreniedjatien Monitoring dated April 9, 1998 for Craig,Alaska Site.

Dear Mr. Supler:

At the request of Wards Cove Packing Company (Wards Cove), AIG Consultants,lnc.-Envjronjnental Management Division (AIGC-EM) performed a review of theCambria Environmental Technology, Inc. (Cambria) document referenced above(Attachment 1). Presented below are AIGC-EM’s comments regarding the documentand the potential for effective in-situ bioremedialion at the Wards Cove site in Craig.Alaska.

EVALUATION OROUNDWATER CHfiSTRY AND POTENT1AJ.ONGOING lNSITiLBiO MEDIATTONiN TIJE GROUNDWATE$

A variety of indigenous organisms that live in the subsurface can convertcontaminants to less toxic byproducts. In aerobic respiration, microbes transformorganic contaminants to carbon dioxide by transferring electrons from the contaminant(oxidizing it) to oxygen (reducing it) or to a less-favored electron acceptor. Dissolvedoxygen (DO) is the most thermodynamically-favored electron acceptor used in thebiodegradation of petroleum hydrocarbons, which are readily biodegradable underaerobic conditions. ideally, aerobic biodegradation of petroleum hydrocarbons occurswhen DO concentrations are greater than 2 milligrams per liter (mg/L). During aerobicbiodegradation, DO levels are reduced as aerobic respirauon occurs.

I3ioremediation parameter results from the September 1997 sampling event,including DO concentrations, are presented in Table 1 of Attachment 1. During that

Sent By: AIGCEM SAN DIEGO; 6194971156; Aug-1-00 14:11; Page 2

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event, DO concentrations (post purging) ranged from 13.65 mg/L to 15.88 mgtL.Cambria states that the data indicates that DO is being consumed by the hydrocarbonplume; however, this is a weak argument due to the relatively small difference betweenDO concentrations within and outside of the plume. AIGC-EM does concur withCarnbria that the shallow depth to groundwater allows a greater rate of oxygen diffusioninto the groundwater than at deeper sites. The most favorable assessment of the datawith respect to potential for aerobic biodegradation at the site would be that the highDO concentrations suggest that future aeTobic biodegradation i.s not limited by theavailability of oxygen.

Under oxidizing conditions, the oxidation-reduction (redox) potential ofgroundwater is positive and reducing conditions are characterized by negative readings;therefore the redox potential of groundwater within the contaminant plume should beless than that measured outside the plume. Cambria presents redox potential levels inand near the plume that arc lower than levels further downgradient of the plume, whichmay indicate that sot-ne level of aerobic biodegradation is occurring within the plume.

After DO has been depleted in the microbiological treatment zone, nitrate may beused as an electron acccptor during anaerobic biodegradation. In the process ofdeni(rifjcatjon, nitratc is reduced to nitrite, and then to nitrogen, which tends to leavethe system as a gas. Nitrate concentrations detected during the September 1997sampling event are slightly lower within the plume than in areas limber downgradientand lateral from the source area. This may be indicative of denitrification processes thathave occurred during natural attenuation.

After DO and nitrate have bccn depleted, sulfate may be used as an electronacceptor for anaerobic biodegradation. Fluctuation of sulfate concentrations across acontaminant plume is used as an indicator of anaerobic degradation of fuel compounds.Sulfate concentrations in groundwater samples collected oii June 1, 1995, ranged fromless than 0.01 mg/L to 522 mgIL. The sulfate ranges detected during the event indicatethat sulfate is available as an electron acceptor for anaerobic biodegradation and thatbioactivity is reducing sulfate concentrations in portions of the contaminant plumeSCambria assumes that the concentration of 522 mg/L detected in well TW-1 reflectsminerals present in seawater, which may be a reasonable assumption.

Ferric iron may be used as an electron acceptor during anaerobic biodegradationof petroleum hydrocarbons In this process, ferric iron is reduced to ferrous iron whichmay be soluble in water. The detection of ferrous iron concentrations is used as anindicator of anaerobic degradation of petroleum hydrocarbons. Ferrous iron was notdetected in five of the seven wells sampled during the September 1997 event.Concentrations of ferrous iron in the remaining 2 wells were 0.0 101 nig/L and 0.0 198mg/L, indicating that ferric iron in the subsurface is not being significantly reduced byanaerobic biodegradation processes. Cambna did not comment on ferrous ironconcentrations in its report.

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CONCLUSION

Given that DO is the most thermodynamically-favored electron acceptor used inthe biodegradation of petroleum hydrocarbons, it would be expected that the decrease inDO concentrations within the contaminant plume as compared to those outside of theplume would be greater than that observed during the September 1997 event. A more-indicative trend is observed where sulfate concentrations within the plume are morethan 100 times less than those outside of the plume, which is the strongest evidence ofongoing anaerobic (not aerobic) biodegradation at this site. It is AIGC-EM’s opinionthat while subsurface conditions appear to be conducive for biodegradation ofpetroleum hydrocarbons at this site, data indicates that the current rate ofbiodegradation will not effectively reduce contaminant concentrations to groundwatercleanup levels in a timely manner.

In the only two wells within the tank farm that were sampled by Cambria in July1999 (MW-I and MW-7), the concentration of total petroleum hydrocarbons as diesel(TPHD) in MWl was 66.5 mg/L as compared to 7.5 g/L during the previoussampling event in July 1998; and, the concentration of TPHD in MW-7 was 284 mg/L(far exceeding the ADEC Section 1.2.3 Table C Draft Guidance Cleanup Level of 1.5mg/L) (Well MW-7 had not been previously analyzed for TPHD). Similar results arereflected in Well MW-i 2 (located downgradient of the tank farm). The concentrationof TPHD in MW-I 2 was 6.72 mgIL as compared to 0.213 ing/L during the previousevent in July 1998. As stated above, this indicates that the current rate ofbiodegradation will not effectively reduce contaminant concentrations to groundwatcrcleanup levels in a timely manner. Given that DO concentrations in the groundwater arealready high, it is unlikely that enhancement of aerobic bioremediation, such as theaddition of oxygen-releasing compounds to the groundwater, would increase the rate ofbiodegradation at this site.

If you have any questions regarding this document, please do not hesitate tocontact me at (714) 435-6654.

Sincerely,AIG Consultants, inc.Environmental Management Division

Attachment 1; Copy of Carnbria’s Report of Field Activities and BioreinediationMonitoring Dated April 9, 1998

Darryl SnowSenior Environmental Consultant

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TTACUMENT 1COPY OF CAMBRIA’S REPORT OF FIELI) ACTIVITiES

AND BIOREMEDIATION MONITORINGDATED APRIL 9, 1998

Sent By: AIGCEM SAN DIEGO; 6194971156;

CAMBRIA

0

Mr. Bob GondekChevron Products Company6001 Bollinger Canyon Road, Building LSan Ramon, California 94583-0804

Aug-1-00 14:12;

0Page 5

April 9, 1998

Re: Report of Field Activities andBloremedlatlon MonitoringFormer Chevron Bulk Fuels Facility #100-1425302 Maui StreetCraig. AlaskaCambria Project 3 1-718

Dear Mr. Ciondek:

Cambria Environmental Technology, Inc. (Cambria) is pleased to present this report summarizing

sampling and retnediation system operation and maintenance (O&M) activies at the above-referenced

site. Site activities were conducted in conjunction with MG Envixonmentai Maiiagemc Inc

(AIGEM) investigation field activities. Presented below is a site summary, ou scope of work, and our

conclusiong.

SITE SUMMARY

This former Chevron Facility is located on Main Street in Craig, Alaska, on the western shoreline of

Pnnce of Wales Island (Figure 1), Records indicate that Chevron Products Company (Chevron)

constructed the site bulk fuels lIctlity in the 1930’s, and operated the facility until 1986 The facility

has been operated by various organizations since, and is now operated by Harbor Enterprises d.b.a.

Petro Marine.

EVIOMENTAL

TooLoc lsC.

41€5rH5rw,

I 5I.iTi B

Site History Various site investigations have been conducted, including the installation of twelve

monitoring wells and numerous soil borings. A vapor extraction system operated on site from (989 to

1992. In 1989, a water treatment unit consistIng of an oiliwatcr separator and an air stripper were also

installed to treat ground water draining from the tank farm area. In 1989, separate phase hydrocarbons

were noted in one monitoring weLl, Benzene and total recoverable petroleum hydrocarbons have been

detected in ground water at up to 127000 parts per billion (ppb) and 35,000,000 ppb, respectively.

Hydogcoiogic Setting: The site subsurface 15 reported to consist of poorly graded gravel and sand.

The site topography slopes north, ftan the tank farm toward Bucareli Bay. Ground water flow direction

is anticipated to follow die site topography, and historical data reports ground water lying

approximately 2(08 ft below grade.

• O.KLA’ID.

F(44ID

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0 UMr. Bob GondekApril 9, 1998 ‘.,A_tvfBRI.A

SCOPE OF WORK

Our objective was to investigate and halt a leaking drainage pipe feeding into the site remediazion systemIn addition, Cambria was to saniple selected temporary monitoruig wells installed by AIGEM and installLocking caps on the e,dsting site wells. Mr. Bergstrom of Canibria conducted site activities September 10,11, 131 and 14, 1997.

Site Maintenance: The leaking pipe was a conveyance pipe (3-inch diameter schedule 40 PVC) whichcarried water from a French drain within the southern (older) containment area to a water storage tank forthe air stripper. The pipe runs below grade for all but the lowest six feet, nearest the air smpper. The leakwas from a valve, located in front of the storage tank, The other end of the pipe, within the southerncontainment aiea, could not be uncovered and plugged because the screened area at the top of the pipe wastoo large and was buried under a significant volume of rock and soil.

After draining water from the pipe, the leaking valve was removed and a capping assembly was placed onthe pipe, stopping any further leaking. The drained water was stored in drums on site with AIGEM’s purgewater, to be included in the site operator’s waste water treatment system. Additional water was drained intothe remediation system holding tank. A 4”x4” wood support was installed to support the lowest end of thepipe. The leak was stopped using available pipe and fitrings (a 3-inch hubless coupler, a 4-inch hublesscoupler, a length of 4-inch ABS pipe, a 4-inch ABS female adaptor, and a 4-inch ABS male pLug), and thosefittings are expected to remain secure for several years. We recommend eventually removing those fittingsand solvent welding a 3-inch PVC slip end cap to the end of the pipe. This would provide a more permanentsolution, but would require draining the conveyance line and French drain again.

Water Sampling: Cambna sampled site wells in accordance with the “Protocol for Monitoring InuijisicBioremediation in Ground Water” published in 1995 by Chevron Research and Technology Company,Health. Envfronmemn, and SaM Group. Cambna’s ground water data is presented in Table I. The AIGEMground water data is included as Attachment 1.

All monitoring wells sampled were purged manually using band ballets. During purging, the ground water

temperature, pH, conductivity, dissolved oxygen (DO), and oxidation-reduction potential (ORP) were

measured. These measurements were taken cx situ for monitoring wells, and were z taken on temporary

wells since AIG purged these wells prior to Cambria’s sampling.

Duc to the combination of a 48-hour hold time on some samples’ analyses and the remoteness of the site, all

wells wCre sampled on two consecutive days. On the first day, alkalinity, sulfate, and ferrous iron sampleswere collected. Nitrate samples were collected during the second day of sampling.

2

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0 0Mr. Bob GondekApril 9, 1998 L.A1%’IBRJ.A

Locking Cap Installation: Locking well head caps were placed on all monitoring wells located, and locked

with standard Chevron padlocks. Wells MW-iC, MW’2, MW-8, and MW-9 were not located. Although a

cap and lock were placed on well MW-i, the top of the casing was cracked, preventing a $ccure seaL. Due

to a lack of survey equipment, the well head was nQt modified.

RESULTS

Using Cambña’s and AIGEM’s data, we have assembled isocoucentrati%m maps for TPHd in soil, TPHg insoil, TPHd in ground water, TPHg in ground water, niate, sulfate, and ORP. These are presented as Figures

2 through 8, respectively.

E4ent ofPetroleum Hydrocarbons: ‘t1 highest concentrations ofTPHd in soil arc located in the tWO above

ground storage tanks (AST) containment areas and the soils immediately down slope (north) of the AST’s.Decreath concentrations extend approximately 150 ft in the presumed ground water flow direction (north),

toward Bucareli Bay. This is consistent with the tank fann being the source area, and a dissolved plume

having migrated slightly down gradient From this map, we estimat, that within 100 ft downgradient of the

tank farm soil concentrations ofTPHd fall below 200 parts per miUion (ppm). The upgradient extent of the

TPHd plume (above 200 ppm) is defined by the September, 1997 data.

AIGEM reported low concentrations of TPHg in soil samples taken from three soil borings. These samples

were all from locations on the northern edge of the southern (older) containment arca (Figure 3). The xtent

of TPHg in soil samples collected in September 1997 is confined to the vicinity of AST containment areas.

The highest concentrations of TPHd in ground water correspond to the areas with the highest concentrations

of TPH d in soil (Figure 4), Concentrations of TPHd decrease in the downgradient direction. Although n

delineated in the up- or crossgraiiient direction in this round of sampling, previous ground water sampling

has provided delineation to the west (B95’3) and decreasing concentration in the upgradient direction

(B95- 1).

Concentrations of TPHg in ground water are Limited to the two AST containment areas and an area

immediately down slope (north) ofTank Li (Figure 5). TPHg was not detected in samples to the noitK south,

east, and west of the dissolved 17Mg plume.

Biological Pa,ameters: Isoconcentration maps for nitrate, sulfate, and oxygen reduction potential (OKP)

are presented as Figui 6 through 8, respeclively. Interpretation of these maps is presented below. Nitites

and sulfates were analyzed as indicators of anaerobic biodegradation ofthe hydrocarbon plume. OR-P was

analyzed to assess how oxidizing the subsurface environment was through a cross section of the hydrocarbon

plume.

3

Sent By: AIGCEM SAN DIEGO; 6194971156; Aug-1-00 14:13; Page 8

0 0Mr. Bob GondekApril 9, 199S AMBRIA

Nkrutes. Nitrates serve as both nutrients and electron acceptors for subsurface bacteria. Typically presentat concentrations of a few ppm, nitrates in shallow ground water originate from human and animal wastes,the decay oforganic materials, and artificially applied fenilizers. In areas of little biological activity, nitratecorentrations remain fairly uniform in both the down- and crossgradient directions. When nitratccontanung ground water flows through a biologically active zone, the nitrates are consumed as nutrients(building blocks of the biomass) and as electron acceptors. As shown in Figure 6, the nitrateisoconcentration map, dissolved nitrates in ground waier arc lower within the petroleum hydrocarbon plumethan in en fu1he downgiadiait and lateral from the source area. These maps also indicate that nitrate andsulfate are being reintroduced to the nitrate- and sulfate-deficient ground water at relativdy highconcentraticms.

Sulfatea: Sulfates also serve as both nutrients and electron acceptors for subswface bacteria. Thedistribution of sulfates typically parallels that of nitrates for the same reasons stated above - they areconsumed within the biologically active area of the plume, Figure 7 shows greatly decreased sulfateconcentrations (more than LOO4old) in the areas of highest TPH concentrations in soil and ground water.Sulfate concentrations partially rebound downgradicrn of the plume (presumably due to mixing ofdesulfatedground water present with ground water which passed to the sides of the hydrocarbon plume). Sulfatesmeasured at 522 ppm in well 1W-I are assumed to reflect minerals present in seawater and were notcontoured,

Oxygen Reduction Potential: Both oxidizing and reducing processes occur in the subsurface, dependingon soil chemistry. contamnates, and, especially, biological activity. Reducing conditions, riolding negativeORP values, may indicate areas where anaerobic biodegradation is occurring. All of the measured ORPlevels were positive, indicating oxidizing conditions. However, the ORP isoconcentration map shows lowerORP levels in and near the plume than levels further from the plume. This small decrease in OR? isconsistent with the small decrease in DO (discussed below) and indicates that biodegradation is occurringprimarily aerobically, rather than anaerobically.

Dissolved Oxygen: DO was measured in ground water within and outside of the hydrocarbon plume.Concentrations of DO were about I ppm lower in the center of the plume (MW-I), but high in all groundwater measured. This indicates that while DO is being consumed with the hydrocarbon plume, it is not aLimiting factor for biological activity at this site with shallow ground water, The shallow depth to waxerallows a greater rate of ocygen diffusion into the ground water than at deeper sites. Also, the relatively coldground water has a greater ability to dissolve oxygen.

4

Sent By: AIGCEM SAN DIEGO; 6194971156; Aug-1-00 14:13; Page 9

0• CMr. Bob GcndckApril 9, 1998

CONCLUSION

The September 1997 field woric sampling and subsequent analysis have accomplished the following:

‘Stopped the leak in piping which led from the French drain in the southern AST containment area;

• Documented the biological activity occurring in the center of the hydrocarbon plume; and

• identified the parameters currently limiting the rate ofbiodegradanon of petroleum hydrocarbons.

CLOSING

We appreciate the opportunity to provide consultant services to Chevron. Please call if you have any

questions or comments.

Sincerely,Cambria Environmental Technology, Inc.

David B. ThomasSenior Engineer

Attachments:Figure 1 - Site PlanFigure 2- Ground Water Benzene Isoconcentration MapFigure 3- Ground Water TPHg Isoconcentration MapFigure 4- Ground Water TPHd Tsocx,ncentration MapFigure 5- Soil Benzene Isoconcentration MapFigure 6- Soil TPlig Isoconccntration MapFigure 7- Soil TPHd Isoconcentradon MapFigure 8 Dissolved Nitrate Sulfate lsoconcentrauon MapFigure 9- Dissolved Sulfate lsoconcenttation MapFigure 10= Odd tion-Reduction Potential Isoconcentration Map

Table 1- Field anl Laboratory Bioranediation ParametersAttachment A - AIGEM Analytical Data

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CAMBRIAField aid Labom Sloimdlmon Parameiws - Pc*iner(btwon B1kFuds FIity l0O14251Wdi C cPkiegCa iy,PcinaChciiian Bidk Fidi F.cily. Crag. Ahik

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TWI 9114197 --- 33.65 --- 191 116 400500 522 0170

TW-2 9111197 -— 14.79 —• 73 275 <000500 92i 116

TW-3 9/11197 --- 1501 -- 59 155 0QS00 51.2 2.73

MW4 9111197 15.99 1319 40 42 110 GOlO) <0100 <00500

MW-S 9114197 13.8 15.05 125 87 149 0.0190 113 00910

MW-6 9111197 4.73 15.08 70 35 177 00500 22.7 0.327

MW-12 9114197 1455 1499 146 135 139 <00S00 5.65 0.0520

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Sent By: AIGCEM SAN DIEGO; 6194971156; Aug-1-00 14:16; Page 21/27

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Attachment A

AIGEM AnaIytc Data

Table 1: Groundwater Monitoring DataWards Cove lank Farm Facility, Craig, Alaska

Well Date Depth to Temperature Conductivity - pH - CommentsMonitored Groundwater (Fahrenheit) (a)SU-4 10-Sep-97 2.70 56 110 7.6 SheenobservedSB-S 10-Sep-97 2.20 55 290 7.6 Sheen observedSB$ 10-sep-97 2.00 81 176 6.2 Sheen observedSB-7 10-Sep.97 2.10 57 213 7.9SB-9 10-Sep-97 2.20 59 185 6.9 Sheen observedS8.10 I0.Sep-97 2.20 56 186 7.5 Sheen observedSB-li 10-Sep.91 3.00 56 288 7.5 Sheen observedSB-12 10-Sep-97 -- -- -- -. No groundwaier yieldSB-13 10-Sep-97 5.00 55 303 8.4

SB-14 10-Sep-97 •--- — No groundwater yieldSB-iS 10-Sep-97 4.40 56 131 7.5 Sheen observed59-16 10Sep47 4.65 55 212 7.6 Sheen observedSB-li 10-Sep97 -- -. -. -- No groundwater y(eklSB-lB 10-Sep-97 1.60 58 21 6.7

SB-19 10-Sep-97 -- -- -. -- No groundwater ylerdSB-20 I 9-Sep-97 -- -. -- -- No groundwater yle?dSS-2I 10-Sep-97 -- -- -- — No groundwater yieldMW-Il lt-Sep-97 NM NM NM NMMW-13 11-Sep-97 NM NM NM NM

(a) mlcrasiemens per centimelerNM Not measured

Well did not yield sufficient groundwater to monilor or sample

Table 2: Soil Laboratory AnalytIcal ResultsWerds Cove Bulk Fuel Facility Craig, Alaska

Sample Coaect.d TPH-I) TPH-G Benzen. ToIu.n• Ethylbnzen. Xylen.e _MTBESBI: 0’-0.5’ 1 1-Sep-97 190 ND<I0 NDcO.005 NDc0.005 NDc0.0O5 ttlDc0.005 N0<0.005582: C-0.5’ 1 1-Sep-97 170 ND<1O NDc0.005 NDD005 NDc0.005 NDcO.005 ND<O005SB3: 0’•0,5’ 1 1-Sep-97 44 NOClO NDC0.005 NDc0.00S NDc0.005 NDc0.005 NDc0.005SPA: 0.5’-l’ 10-Sep-97 590 NOClO NDc0.005 ND<0005 NOcO.005 NDCO005 ND<0.006

a SPA: 25’-3’ 10-Sep.97 390 NDclO NDc0.1 ND’cO.I NDcO.1 NDcoi NDcO,1SB5: 0.5’-l’ 10-Sep.97 350 ND’clO NDcO1 NDcO.1 NDcO.1 NDcO.1 NDcO.1SB5: 2.5-3’ 10-Sep-97 6,800 ND<10 NDC0.005 NDcO 005 NDcO.005 NDcO.005 NDcO.005SBO: 0.5-1’ 10-Sep-97 630 NDCi0 NDcO 005 NDcO.005 NDcO.005 NDcO.005 NDc0.005S86: 2.5131 10-Sep-97 49 NDc10 NDCO.005 NDcO.005 NDcO.005 NDcO.OOS N0’cO.OOSSB?: 2.5$’ 10Sep.97 35 NDc1O N[)CO.005 NI)0.005 NOcO 005 NDcO.005 NOcO.C)05S89: 0.51’ 10-Sep-97 11000 100 NDcO.1 FJOcO.1 NDCO.1 2.9 NDcO.1S09: 2.5-3’ 10-Sep-97 14,000 200 NDc0,1 0.3 0.6 11 NDc0.1SB1O:0.5’-I’ 10-Sep-97 14000 500 NDcO.1 0.5 0.3 2.4 ND4.lSB 10: 2.5’-3 10-Sep-97 7,800 100 NDCD.t NDCO.1 0.1 0.8 NDcO.tSBII: 05’-l’ 10-Sep-97 2,800 80 ND0.1 NDcD.1 0.2 1 NO<O.1S811: 25.3’ 10-Sep-97 4,400 500 0.2 ND0.1 1.5 88 ND<O.1S812: 2.5’3’ 10-Sep-97 NDc10 NOCIG NDcO.005 ND<0.005 ND<O.005 NDcO.005 NOcO 005SB 13: 3’4.5’ 9-Sep-97 NOClO NO<10 ND<0.005 ND’0.005 ND<0.005 NDc0.005 NDO.0055814: 0’4.5’ 9-Sep-91 3,800 ND(10 NDcO.005 NO cO 005 NOcO.005 NDcO.005 ND<O.005S814:4.5’-5’ 10-Sep-97 110 NDC10 NDc0.005 NDCO.O05 NDcO.0O5 ND<0005 NDcO005SB1& 3.5-4’ 9-Sep-97 1,300 NDc10 NDc0.1 NDcO,1 NDcO.1 NDcO.1 NOc0.1SOIS 4445I 9-Sep-97 300 NDciO ND<O.005 NDc0.005 NDcO.005 NDcO.005 NDc0.005S817: 3.5’-4’ 9-Sep-97 88 NDc1O ND<O.1 NDc0.1 NDcO.1 NO<0.1 NDcUiSBI8: 2.5’-3’ 10-Sep-91 320 NOclo c0.1 NOc0.1 ND’CO.l ND<0.1 NDQ.1SBIO: 2.5’-3’ 10-Sep-97 I-iD10 NO<10 ND<O.O05 ND0005 NOcO.005 N0<0.005 NDcO.O0SS820: 2.5’-3’ 10-Sep-97 55 ND<10 ND<0.005 NDcO.0O5 NDcD.005 NO’cO.005 NDCO.O05SB21: 2.5-3’ 10-Sep-97 33 NO<1O ND<0.005 NDcO.O05 ND<0.005 NDCOOD5S823: 0.5’-l’ tl-Sep-97 NDC’l0 NDC1O ND<G.D05 NDcO.005 NDC0.005 NDCD.005

- NDcO.005C,,

Table 2: Soil Laboratory Analytical ResultsWards Cove Bulk Fuel Facility, Cralg Alaska

TPHG Total peiroleum hydrocarbons as gasolineTPHD Total peholeum hydrocarbons as dieselAll results k milligrams per kilogramNA Not anyzedND = Not detecledTPHG and BTEX analysis by USEPA Melhod 0260 and GCIMS combinalioniPHO analysis by GCIMS combination (extracted by USEPA Method 3510)TPHD analyUcal range Is C8C40Samples analyzed by Zymax Enwolechnology In San Luis Oblspo, California

Table 3; Groundwater Laboratosy Analytical ResultsWards Cove Bulk Fuel Facility, Craig, Alaska

Sample Collected TPND - TPHO — Banz.ne ToIu•n• Ethylbenz.ne _Xylenei MTBE

SB4 10-Sep97 NA ND(50 NDCO.5 NO<0.5 NDC0.5 2.8 - NDc05

SB5 10-Sep-97 NA NOcIDO NDc1.O NDc1.0 NDc1.0 ND’cl,O NDq.0S86 10-Sep97 3,100 1,000 73 3.9 1.4 7,1 3.1SB7 10-Sep-97 NA ND<50 ND<D.5 ND<0.5 NDcO.5 ND<O.5 NDc05SB9 10-Sep.97 NA 2,000 2.9 13 25 240 NDc2.0

5810 10-Sep-97 NA 3.000 32 2) 9.9 58 NDc2.0

SB11 10-Sep-97 10,000 5,000 160 9.3 41 210 NDc2.0

SBI 3 10-Sep-97 NOclO0 NOc50 NDO.5 ND<D.5 NDcO.5 NDc0.5 NDcO.5

SBI5 10-Sep-97 48,000 NDctOO NDcI.O NDcl.0 NDct,0 ND1.0 NDcI,o

S816 10-Sep-97 NA 10000 13 2.4 4 21 ND<2.0

SBI8 10-Sep-97 280 ND<S0 NDcG.5 ND<0.5 ND<0.5 ND<0.5 ND<0.5

SB2I 10-Sep-91 NA NDc50 ND’cO.5 07 NDcO.5 NOcO.5 NDcO.5

S822 11Sep-97 150 ND<50 NDC0.5 NDC0.5 NOcO.5 ND<0.5 NDcO.6

SB23 11-Sep-97 250 ND<50 NDO.6 NDCO.5 NDCO.5 ND<O5 NDc0.5

MW-ti 11-Sep-97 130 NDC50 NDcO5 1.1 NDcO.5 NDcO5 ND’0.5MW-13 11-Sep-97 160 ND’C50 NDc0.5 ND<0.5 NDO.5 NDc0.5 NOcO.5

Alt StripperPlpfrg 9-Sep-97 910 210 4.6 0.5 0.9 0.9 NDC0.5

Surface WalerAir S1rper 9-Sep-97 1,1043 ND<50 N0<0.5 NDCO5 NtkO.5 NDc05 NDO.5

TPHD Total petioleum hydrocarbons as dieselTPKG a Total petroleum hydrocarbons as gasolineAl results in micrograms per literND Not detectedNA = Not analyzed because sample destroyed Ni trans to taboraloryTPHG and OTEX analysis by USEPA Method 8260 and GCIMS combination

TPHO analysis by GCIMS combination (exiracled by USEPA Method 3550)MTBE = MethyI4-Butyl EtherSamples analyzed by Zymax EnvirotechrLology in San Lw5 Oblspo, California

table 4:. Bt.akdown of Sail Analytical Results by Carbon Chain Ranges

Wards Cov• Bulk Fu.I Facility) Craig, Alaska

Sample Date C6C10 C6C10 C6C1D Ct0-C25 C10-G25 C10-C25 C25.C38 C25-C36 C25-C36

Number COIIec*.d TPH Aliphatic Aromatic TPH Allphatlc Aromatic TPH Atiphatic Aromatic PNAs

S85:25-3’ IO-S5fr97 NOClO NC)(10 ND<10 6,600 5,344 2672 ‘ 120 108 36 ND

SB9: 0.5’.l’ 10-Sep-97 100 70 50 10.500 8,400 4.200 500 450 150 ND

SB9: 2.5’-3’ 10-Sep97 200 140 100 13,500 10,600 5,400 500 450 150 8.9(a)

SB1O: 0.5-1’ 10-Sep-97 500 350 250 13,800 11,040 5,520 200 180 60

SBIO: 2.5’-3’ 10-Sep-91 100 70 50 7,710 6.168 3084 90 81 27 ND

SB11:0.51’ 10Sep-97 80 56 40 2,780 2,208 1,104 40 36 12 ND

SBII: 2.5’-3’ 10-Sep-97 500 350 250 4.350 3,480 1,740 50 45 15 ND

SBI4: 0’4)5’ 9-Sep-97 ND(10 ND<10 NOCtO 3.260 2,608 1.304 540 486 162 ND

S815: 35-4’ 9-Sep-97 20 14 NDc10 I ,230 984 492 70 63 1 NI) —

Shaded corcenlraUons are those that exceed ADEC Sd Cleanup Standards (Table 8 from Draft Cleanup Standards dated 11112197

assLa’nIng migration to grounáwater and ,er 40 rnches annual rainlall)

Jl results k milligrams per kogramn

TPI4 Total petroleum hydrocarbons

PNAs Polynuclear aromatic hydrocarbons

ND Not detected (hsted wilh laboratory method detection limiL)

Results reported by Zymax EnvlrotecInoIogy in San Luis Obispo. CaIornia

(a) Naphihalene

The foflowing percentages were used to break down the TPH into aliphatic and aromatic composition:

onRanoe Percent Ahahalic Perceril Aromatic

CS-dO 70 50

C10-C-25 .80 40

C25-C3S 90 30

Tabte 5: Br•akdown of Groundwater Analytical Results by Carbon Chain Ranges

Wards Cow. Bulk Fuel Facility, Craig Alaska

Sample Dii. C6.C10 C6-C10 C6.C10 C10-C25 C10-C25 C10-C25 C25-C36 C25.C36 C25.C36

Number Collected TPH AUpliatic Aromatic TPH Alphatic Aromatic YPH Aflphatlc Aromatic PNAs

$86 10-Sep.97 1,000 700 500 2,850 2280 1140 250 225 75 NDc2

$89 10-Sep-97 24000 1,400 1,000 NA NA NA NA NA NA

$810 10-Sep-97 3,000 21100 1,500 NA NA NA NA NA NA NA

SB11 10-Sep.97 5.000 3.500 2,500 9,800 7,840 3,920 200 180 60 (a)

$815 10-Sep-97 NDclOO NOCIOG NDclOO 44600 35,680 17,840 3,400 3.060 1020 ND<20

SB16 10•Sep-97 10000 7.000 5+000 NA NA NA NA NA NA N02.0

ShipperPiping 9-Sep-97 NDc50 ND<50 NDc50 610 648 324 100 90 30 ND<2

SudaceWaler AirShipper 9-Sep-97 NOc50 ND<50 ND<50 590 472 236 510 459 153 NDc2

Shaded concenlratlons are (hose that exceed ADEC Groundwater Cleanup Standards (Table C lrcxn Draft Cleanup Standards dated 11112197).

All restils in microams per literTPH = Total petroleum hydrocarbonsPNAs Potynuclear aromatic hydrocarbonsND Not detected {lsted wtth laboratory method detection limit)NA Not analyzed (sample destroyed in trans4t to teboratory)Results reported by Zymax Envfrolechnology k’ San Luis Obispo, Califointa

(a) Concentrations of ñuorene, naphihalene, and phenanthrene detected at 2.5, 12. and 5 micrograms per lIter, respectively

Carbon Range Percent PJiøhaUc Perceni Aromalic

C6-C10 70 50

C10.C25 80 40C25-C36 90