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~ oo?po?at/of~ Environmental Engineering & Consulting Shell Oil Products US Quarterly Groundwater Monitoring Report, Shell Bakersfield Refinery 6451 Rosedale Highway Bakersfield, California 93308 Third Quarter 2003 Project No.: '077-030 THIRD QUARTER 2003 GROUNDWATER MONITORING REPORT SHELL O!L PRODUCTS U.S. BAKERSFIELD, CALIFORNIA November 12, 2003 Prepared for: Shell Oil Products U.S. 6451 Rosedale HighwaY Bakersfield, CA 93308 Prepared by: TriHydro Corporation 920 Sheridan Street Laramie, WY 82070 TriHydro Corporation 920 Sheridan Street (307) 745-7474 Laramie, Wyoming 82070 FAX: (307) 745-7729 H:\Projects\SHELL\BakersfieidAFin~l\077~030g3Q '03 Reportg3Q'03rpt.doc CERTIFICATION THIRD QUARTER 2003 GROUNDWATER MONITORING REPORT SHELL OIL PRODUCTS U.S. BAKERSFIELD, CALIFORNIA I certify that I have reviewed this document. To the best of my knowledge, the data contained h'erein are true and accurate and the work was performed in accordance with appropriate and customary professional standards. California Certified BARNES Licenses Expire October 31, 2005 23 .... Date #527 H:\Projects\SHELL\Bakersfield\Final\077-030~3Q '03 Report\3Q'03rpt.doc TABLE OF CONTENTS Section PaRe 1.0 INTRODUCTION ................................. 1-1 2.0 BACKGROUND AND FACILITY DESCRIPTION .......................................... 2-1 2.1 Geologic and Hydrogeologic Setting ...................................................................... 2-1 2.2 Distribution of Petroleum Constituents ............................................... 2,2 3.0 4.0 REMEDIATION STATUS ............................................................................ 3-1 3,1 Identify and Eliminate Receptor Pathways ............................................................. 3-1 3,2 Hydraulic Containment System ........................................................... 3,1 3.3 Air Sparge System .................................................................................................. 3,3 3,4 Vapor Extraction System .......................... 3-3 FIELD ACTIVITIES ..................................................... 4-1 4.1 Sample Collection and Handling Procedures ............................................. 4-1 5.0 THIRD QUARTER 2003 GROUNDWATER MONITORING RESULTS ............................ 5-1 5.1 Groundwater Flow Direction and H~,draulic Gradient ................ ' ............................. 5.1 5.2 Separate Phase Hydrocarbon Occurrence ................................................ 5.1 5.3 Results of Laboratory Analyses of Groundwater Samples ........................ 5-2 5.3.1 Shallow Zone Groundwater Analytical Results ....................................... 5-2 5.3.2 Intermediate Zone Groundwater Analytical Results ................................ 5-2 5.3.3 Deep Zone Groundwater Analytical Results ...................................... 5-3 5.3.4 Groundwater Supply Well Analytica! Results ......................................... 5-3 5.3.5 Area 3 Well Groundwater Analytical Results ........................................... 5-3 5.4 Quality Assurance/Quality Control Results (QNQC) .............................................. 5-4 5.5 Results of Field DO/ORP Readings .......................... 5-4 6.0 CONCLUSIONS ........................................................................ 6-1 7.0 WORK PROPOSED FOR NEXT QUARTER (FOURTH QUARTER 2003) .................... 7-1 8.0 REFERENCES ............................ H:\Projects\SHELL~Bakersfield~Final\077*030~3Q '03 Report~3Q'03rpt.doc Appendix. A Field Data Sheets B Laboratory Analytical Reports LIST OF APPENDICES H:~Projects\SHELL\Bakersfiel~Final\077-030\3Q '03 Report\3Q'03rpt.doc LIST OF TABLES Table 2 3a 3b 4 Third Quarter 2003 Groundwater Monitoring Summary, Bakersfield Refinery, Shell Oil Products U.S. Third Quarter 2003 - Groundwater Levels, Bakersfield Refinery, Shell Oil Products U.S. Third Quarter 2003 - Monitoring Well Analytical Results, Bakersfield Refinery, Shell Oil Products U,S, Third Quarter 2003 - Water Supply Well Analytical Results, Bakersfield Refinery, Shell Oil Products U.S. Third Quarter 2003 - Quality Assurance Results, Bakersfield Refinery, Shell Oi! Products U.S. H:\Projects\SHELL~Bakersfield\FJnal\077-03093Q '03 Report\3Q'03rpt,doc LIST OF FIGURES Fi,qure 1 2 3 4 6 8 10 11 12 13 14 15 16 17 18 Site Vicinity Map Site Plan Potentiometric Map for Groundwater <110' bgs, August 2003 Potentiometric Map for Groundwater 110' - 140' bgs, August 2003 Potentiometric Map for Groundwater >140' bgs, August.2003 MTBE Plume Contours for Groundwater <110' bgs, August 2003 MTBE Plume Contours for Groundwater 110' - 140' bgs, August 2003 MTBE Plume Contours for Groundwater >140' bgs, August 2003 MTBE Results for Nearby Water Supply Wells, August 2003 Benzene Plume Contours for Groundwater <110' bgs, August 2003 Benzene Plume Contours for Groundwater 110' - 140' bgs, August 2003 Benzene Plume Contours for Groundwater >140' bgs, August 2003 Benzene Results for Nearby Water Supply Wells, August 2003 Air Sparging Well Locations Potentiometric Map for Groundwater and GroUndwater Analytical August 2003 DO/ORP Results for Groundwater <110' bgs, August 2003 DO/ORP Results for Groundwater 110'- 140' bgs, August 2003 DO/ORP Results for Groundwater >140' bgs, August 2003 Results- Area H:\Projects\SHELL\Bakersfield\Final~077-030',3Q '03 ReP0rt\3Q'03rpt.doc 1.0 INTRODUCTION Shell Oil Products US (SOPUS) has prepared this quarterly groundwater monitoring report to detail activities conducted at the Shell Bakersfield Refinery for the reporting period of July through September 2003 (Third Quarter 2003). The principal assessment, remediation, and management activities conducted during this reporting period included: Operating dissolved-phase hydrocarbon-contaminated groundwater recovery (IRM systems), air sparge, and vapor extraction systems;' Quarterly groundwater-quality monitoring in refinery areas 1 through 3; Quarterly groundwater-quality monitoring of groundwater supply wells located immediately north of the refinery (north of the Calloway Canal); Routine monitoring associated with the NPDES permit for discharge from the IRM systems; Installation of additional monitoring/extraction well (EW-14)down-gradient from the Terminal's Shallow Zone dissolved-phase methyl tert-butyl ether .(MTBE) plume (southwest of Well B-170M); Incorporating the results of the third quarter 2003 assessment, remediation, and management activities into this Quarterly Groundwater Monitoring Report. A summary sheet describing groundwater monitoring activities for the third quarter of 2003 is included as Table 1. Section 2.0 provides general Site background and facility description information. Section 3.0 details the active remedial systems at the Site. Field activities and analytical results associated with the third quarter groundwater sampling event are presented in sections 4.0 and 5.0, respectively. Section 6.0 summarizes the third quarter data. Work to be conducted during the fourth quarter 2003 are presented in Section 7.0 and references are provided in Section 8.0. H:~Projects\SHELL~akersfield~Final\077-030~3Q '03 Report\3Q'03rpt.doc 1-1 2.0 BACKGROUND AND FACILITY DESCRIPTION Shell Oil Products U.S. (SOPUS) has owned and operated the facility now known as the Shell Bakersfield Refinery since October 2001. The Shell Bakersfield Refinery consists of three interconnected' operating areas known as Areas 1, 2, and 3. Area 1 was built in 1932 by the Mohawk Oil Company (1932 to 1970) and was subsequently owned by Reserve Oil and Gas Company (1970 through 1980), Getty Oil Company (1980 through 1984), Texaco (1984 through 1998), and Equilon Enterprises LLC (1998 through 2001). The adjacent Area 2 was built by the US Government in .1942 and was subsequently owned by Lion Oil Company, Tosco Oil Company, Texaco (1986 through 1998), and Fquilon Enterprises LLC (1998 through 2001), Shell Bakersfield Refinery Areas 1 and 2 encompass approximately 599 acres of land located in the city of Bakersfield, Kern County, California (the Site, Figure 1 ). Area 3 was built and operated by the Independent Valley Energy Company (1978 to 1987) and was subsequently owned by Texaco (1987 to 1998) and Equilon Enterprises LLC (1998 to 2001). Area 3 is located approximately 1.5 miles northeast of Area 1 and encompasses approximately 357 additional acres of land. 'The Shell Bakersfield Refinery currently processes about 70,000 barrels of crude oil per day into products such as automotive gasoline, diesel fuel, petroleum coke, fuel oils, liquefied petroleum gas, asphalt, and sulfur. A site plan showing the Site and adjacent properties is included as Figure 2. 2.1 Geologic and Hydro.qeoloqic Settinq The Site is located at an elevation of approximately 390 feet above mean sea level (msl) and is underlain by approximately 200 feet of late Pleistocene and Recent alluvial sands and gravel (deposited primarily by the Kern River). The Kern River alluvial fan is a large wedge of sand and gravel on the east side of the valley that forms where the Kern River exits the Sierra Nevada foothills, Alluvial fan deposition is the geologic response to the change in slope and to the transition from confined to unconfined flow (Dale, 1966). 'Water runoff from the Sierras flows from the northeast to the southwest down the bed of the · Kern River onto the alluvial fan, where water slowly seeps from the river bottom into the distant margins of the fan. Elk Hills, which represents the surface expression of a subsurface anticline, then diverts the subsurface flow southward towards Buena Vista Lake (Dale, 1966). The near-surface aquifer is made up of Pleistocene to Recent sands and gravel. These sediments cut into older alluvial fan and lacustrine sediments of the Plio-Pleistocene Tulare Formation. An angular unconformity then separates the continental sediments from underlying marine deposits of the Pliocene San Joaquin Formation (Bertoldi, 1991). Studies of the Site and surrounding area indicate that the upper 100 feet of sediments consist primarily of interbedded sands and silts (with minor clay) deposited as the outwash plain of the Kern River. Because of the nature of braided stream deposition, correlation of distinct stratigraphic horizons is difficult and may vary across the Site and vicinity. H:\Projects\SHELL~Bakersfield\Final\077-030~3Q '03 Report~3Q'03rpt.doc 2-1 For monitoring purposes, the site stratigraphy has been divided into three distinct horizons: · Depth of less than 110 feet below ground surface (bgs) (Shallow Zone); · DePth of 110 feet to 140 feet bgs (Intermediate Zone); and · Depth of greater than 140 feet bgs (Deep Zone). The less permeable aquitards that separate these horizons are relatively uniform across the Site. Although there may be two or more coarse-grained strata present within any of these horizons, each individual monitoring well is typically screened across only one stratum. The shallowest groundwater in the site vicinity is generally unconfined, With confined conditions occurring locally. The water table elevation has fluctuated by tens of feet per year in response to changes in regional groundwater recharge and pumping conditions. There was approximately 100 feet of water table rise between 1993 and 1999. Details related to current water level fluctuations and elevations are discussed in Section 5.1. 2.2 Distribution of Petroleum Constituents Two source areas for MTBE-affected groundwater have been identified at the Site, One source area is located at the Sales Terminal (hereinafter referred to as the "Terminal"), along the southwest corner of Fruitvale Avenue and Rosedale Highway, The seCOnd source area (Blending Area) is located near the eastern property line within the Refinery, near the railcar- loading area in Area 1, Figure 2 shows the locations of these two source areas. A release of petroleum hydrocarbons containing MTBE first occurred from the Terminal's underground product lines in March 1999. Subsequent releases occurred in December 2000 and April 2001. A reformate release was identified in the vicinity of the Area 2 Refinery's hydrocracker in !987. Hydrocarbon recovery activities began in June 1987. The system was expanded in 1988 and was continued until September 1990, when thicknesses of hydrocarbon on the groundWater table decreased to zero. Approximately 2750 barrels of reformate were recovered. Hydrocarbon product is currently detected in only three wells onsite (refer to Section 5.2). H:~Projects~SHELL\Bakers§eld~Final\077-030~3Q '03 Report~3Q'03rpt,doc 2-2 3.0 REMEDIAT!ON STATUS A number of remedial measures have been implemented to address subsurface degradation associated with the reformate leak detected in 1987 and the MTBE spills identified in 1999. The principal components of the current remediation program are: 1. Identify and eliminate receptor pathways for subsurface contamination (a concern related to the dissolved MTBE terminal plume); 2, Hydraulic containment of MTBE plume using the IRM groundwater pump and treat systems; 3. In-situ air sparging system to treat degraded groundwater in the reformate and MTBE spill areas; and 4. Soil vapor extraction to remediate the vadose zone in both the reformate and MTBE areas. This section summarizes the status of each of these systems during the third quarter 2003. 3.1 Identify and Eliminate Receptor Pathways The first step associated with the Terminal dissolved MTBE plume was to identify and eliminate receptor pathways. Five off-site water supply wells were identified as potential future receptors due to their proximity to the dissolved MTBE plume. Four of the wells (EPC, Gaslight, Simpson, and IP) have been destroyed. The remaining supply well GD, on the Caza Drilling property is not operating, Other off-site supply wells in the site vicinity are north of the Calloway Canal. The dominant groundwater flow direction is to the west/northwest, parallel to the Calloway Canal, and sampling results indicate that dissolved MTBE above 1.0 microgram per liter (ug/L) does not extend north of the canal. 'Four on-site supply wells provide water to the refinery. All wells are screened at depths greater than 500 feet and are separated from the strata of MTBE-affected groundwater by a regional aquitard that begins at a depth of approximately 250 feet bgs. The refinery's four on-site water production wells are utilized as a source of process water. The use of two of the wells as a source of potable water for the refinery was discontinued on June 22, 2002, when the potable water distribution systems for Areas I and 2 of the refinery were connected to a municipal water supply. Area 3 of the refinery utilizes municipal water for process and potable uses. 3.2 Hydraulic Containment System The MTBE plume originating at the Terminal is contained through operation of two groundwater extraction systems (IRM-1 and IRM-2). The effectiveness of the hydraulic containment system is H:~Projects\SHEL~.~_Bakersfield~Final~077-030~3Q '03 Report~3Q'03rpt.doc 3-1 provided through the following: 1) extraction from the leading (down-gradient) edge of the plume, 2) extraction from additional wells as necessary to provide capture of the full width of the dissolved plume, 3) extraction from enough locations along the length of the plume to ensure hydraulic containment under conditions of shifting groundwater flow, and 4) extraction from sufficient depth to capture the vertical extent of the dissolved plume. The hydraulic containment system has been designed with enough flexibility to accommodate the anticipated fluctuations in water table elevation. In anticipation of dropping water levels, groundwater extraction wells have been completed in both the Shallow Zone, at a depth of approximately 80 t° 1 '10 feet (currently the primary interval containing dissolved-phase MTBE), and the Intermediate Zone, at a depth of approximately 110 to 140 feet. Extraction from the Intermediate Zone 'is a precaution against MTBE bypassing the containment system as the water table drops. Shallow extraction wells that go dry are temporarily capped and preserved for possible later use in the event that the water table rises in future years. IRM-1 consists of seven extraction wells (EW-3, 4; 5, 6, 7, 12, and 13) located 50 to 200 feet south of the Calloway Canal, approximately 450 feet west of the Charity Avenue cul-de-sac. IRM-1 was constructed to provide hydraulic containment at the down-gradient, leading, edge of the Terminal dissolved-phase MTBE plume. Treated water from IRM-1 currently discharges to the Calloway Canal. During the third quarter 2003, the average discharge rate was 76.8 gallons per minute (gpm) or approximately 110,592 gallons per day (gpd). Influent MTBE concentrations for the !RM-1 extraction wells ranged from less than 1.0 pg/L to 17 IJg/L during the third quarter of 2003, IRM-2 consists of one extraction well (EW-8) north of Charity Avenue and four extraction wells (EW-9, 10, 11, and B~149) south of Charity Avenue. One additional extraction well (EW-14)was installed down-gradient of EW-11 in August, 2003 to provide additional hydraulic containment and remediation of the leading edge of the Shallow Zone MTBE plume. The well was manifolded to the extraction and treatment system and began pumping in September 2003. Treated water from IRM-2 also discharges to the Calloway Canal. During the third quarter 2003, the average discharge rate was 94.9 gpm or approximately 136,656 gpd. Influent MTBE concentrations for IRM-2 extraction wells ranged from less than 1.0 pg/L to 18,000 IJg/L during the third quarter of 2003. Both IRM-1 and IRM-2 were fully operational during the third quarter of 2003 and operated in accordance with the NPDES permit conditions. The average effluent flow from IRM-1 was 73.89, 76.07, and 80.44 gpm for July, August, and September 2003, respectively. The average effluent flow from !RM-2 was 104.11, 90.85, and 89.88 gpm for July, August, and September 2003, respectively. The groundwater treatment technology is a biologically augmented, granulated active carbon system (BioGAC). The BioGAC system utilizes a standard carbon treatment system inoculated with a naturally occurring, MTBE-degrading bacteria that has been isolated and patented by Shell Global Solutions. The BioGAC treatment technology is currently utilized for both the IRM-1 and IRM-2 extraction systems. As a precaution, the process streams from the treatment plants are run through a standard GAC unit before being discharged. H:tProjects',SHELLtBakersfietd~FinaltO?7-O30',3Q '03 Repor~'~3Q'O3rpt.doc 3-2 3.3 Air Spar,qe System In areas of favorable geochemical conditions, aerobic microbial populations are capable of degrading MTBE and reformate. Preliminary studies conducted by Shell Global Solutions WestholloTM Technology Center indicate indigenous MTBE-degraders (and hydrocarbon degraders) are present at the Site, however the rate of biodegradation is relatively slow: In areas within and down-gradient of a product release, groundwater is typically depleted of oxygen. The addition of oxygen to the groundwater system (e.g. through air sparging) is expected to stimulate microbial growth and associated MTBE and reformate biodegradation, Air sparging well locations are shown on Figure 14. The Blending Area dissolved MTBE plume is being contained by enhanced bioremediation through the use of the air sparge system. Historica! MTBE concentrations show that the Blending Area MTBE plume is stable and should not affect offsite receptors. In addition, the refinery installed a vapor extraction well in the Blending Area to supplement remedial activities in this area, The well became operational on June 2, 2003, The refinery-wide air sparge system operated continuously during the third quarter of 2003. The refinery-wide system consists of 46 well clusters. Five well clusters were temporarily shut down on June 26, 2003 (at the request of Shell personnel) to investigate and repair a water line leak in the area. The five clusters were returned to service on July 8, 2003. Several shallow zone air sparge wells were shut down in the third quarter of 2003 due to a drop in the water table. 3.4 Vapor Extraction System The refinery vapor extraction system (VES) has a capacity of 21,000 standard cubic feet per minute (scfm). Extraction wells associated with the VES unit are located throughout the dissolved reformate plume areas, the blending area, and the Sales Terminal, Petroleum hydrocarbon-affected soil vapor is currently being removed from the source areas at the refinery and Terminal by means of the VES system. The VES well extraction and operating system is consistently being modified to increase mass removal rates and to take advantage, of the dropping water levels, addressing residual and free-phase product from progressively deeper strata as the water table continues to drop. The existing VES treatment system has sufficient capacity to accommodate increased extraction rates in the vicinity of the Terminal and other refinery areas. The VES system recorded an online operating time of approximately 89.2% for the third quarter of 2003. System downtime in the third quarter was primarily related to non-availability of steam and instrument failures. The VES system removed approximately 4,216 gallons of product during the third quarter of 2003. H:\Projects\SHEl.,L~Bakersfield\Final\077-030~3Q '03 Reportg3Q'03rpt.doc 3-3 4.0 FIELD ACTIVITIES The third quarter (August) 2003 monitoring event included measuring fluid levels in 242 wells and collecting samples from 177 groundwater monitoring wells. The depth to water was measured at each well using an electronic probe, The probe was decontaminated prior to each use with a detergent-water solution and rinsed with distilled water. The probe and measuring tape were then air dried prior to the next use. The depth to water was recorded on each field sampling form (Appendix A), An electric submersible pump was used to collect a groundwater sample at each well. The pump and attached electrical cable were decontaminated prior to each use by immersing the pump mechanism into a detergent-water solution. The cables were cleaned and the pump was operated for several minutes to circulate the detergent-water solution through the impellers and housing, prior to rinsing in tap water and a final distilled water rinse. Dedicated tubing was attached to the clean submersible pump and the pump was lowered approximately one to two feet below the surface of the water table. 4.1 Sample Collection and Handling Procedures The pump discharge tubing was connected to a flow-through cell, which was equipped to measure field parameters during well preparation activities. The pump was turned on and operated at a Iow flow rate. Field parameters consisting of pH, specific conductance, temperature, dissolved oxygen (DO), and oxidation/reduction potential (ORP) were measured with a Horiba U-22 field meter. The field meter was calibrated according to manufacturers' specifications at the beginning, middle and end of the sampling event. The equipment operation manuals were consulted to ensure proper calibration procedures. Approximately one casing volume of groundwater was purged from each well prior to recording the first field parameter measurement. At least three measurements were recorded to ensure stabilization of field parameters. Field parameter measurements were recorded on the sampling forms at each Well. Once the field parameters stabilized (i.e. pH + 0.1 pH unit; temperature + 0.1 degree Celsius; specific conductance and turbidity + 10 percent) and/or three casing volumes of groundwater had been removed, groundwater purging was discontinued. The wells were allowed to stand for a sufficient period of time to equilibrate to within 80% of the static groundwater level before collecting samples. Groundwater samples were collected using new, unused, disposable bailers and placed in the appropriate laboratory-supplied containers. Attempts were made to minimize agitation of the samples during filling of the sample containers. Care was also taken to prevent overfilling and to ensure proper preservation of the sample. In addition to the 177 groundwater samples, twelve equipment blanks and one field blank were analyzed in the third quarter 2003 groundwater sampling event for quality assurance/quality control (QNQC) purposes. H:\Projects~SHELL~akersfield~Final\077-O30\3Q '03 ReportL3Q'0:~rpt.doc 4-1 The sample containers were labeled, placed on ice in a sample cooler and submitted CalScience Environmental Laboratories, Inc. (Garden Grove, California), a California certified laboratory, fOr analysis of BTEX/MTBE by Method 8260 and TPH as gasoline (TPH-G) by modified Method 8015. A chain-of-custody/sample-analysis-request (COC/SAR) form accompanied the samples to the laboratory. The analytical results of the August 2003 monitoring event are presented in Section 5.3. H:\Projects~SHELL\Bakersfield~Final\077-030~3Q '03 Report\3Q'03rpt.doc 4-2 5.0 THIRD QUARTER 2003 GROUNDWATER MONITORING RESULTS Groundwater elevations and water quality samples are collected on a quarterly basis at the Site. The results of the fluid level measurements and groundwater quality sampling are presented in this section. 5.1 Grou_ndwater Flow Direction and Hydraulic Grad_ient Static groundwater levels were measured in groundwater monitoring wells on August 11 and 12, 2003. A summary of groundwater depths and elevations obtained at the Site is presented in Table 2. The depth to groundwater beneath the site (Areas 1 and 2) ranged from 56.63 feet bgs in well U4 to 115.61 feet bgs in well B.131L2. Groundwater elevations calculated from the August 2003 groundwater measurements indicated a direction of subsurface flow to the west/northwest with an approximate hydraulic gradient of 0.012 foot per foot (ft/ft) in the Shallow ZOne, 0.0097 ft/ft in the Intermediate Zone, and 0.0093 ft/ft in the Deep Zone. Fluid levels were measured under static conditions in selected wells during the August 2003 quarterly monitoring event. Groundwater elevations are corrected to equivalent groundwater head where hydrocarbon is present, based on hydrocarbon thickness and specific gravity. These corrections are made for each hydrocarbon-bearing well by multiplying the gauged thickness of separate phase hydrocarbons (SPH) by the assumed average specific gravity of SPH (0.8). The resulting number (known as the product head) is then added to the water- surface elevation to determine the equivalent head value for that well. Potentiometric maps for groundwater'less than 110 feet bgs, between 110 and 140 feet bgs, and deeper than 140 feet bgs, are included as Figures 3 through 5, respectively. A potentiometric map for Area 3 groundwater monitoring wells A3-01 through A3-04 is included as Figure 15. Since 1999, the water table has been decreasing in elevation and dropped by more than one foot per month during 2001, with an average elevation decrease of approximately 0.57 foot per month in 2002. The water table rose approximately 2.3 feet across the site in the first quarter of 2003, dropped approximately 0.7 feet in the second quarter of 2003, and dropped an average of approximately 0,06 feet across the Site in the third quarter of 2003. A significant increase in water levels was observed along the southwestern portion of the Site, in the vicinity of wells B- 103, B-104, B-105, RS-MN2B, RS-MS2,5C, and B-111. The rise in water levels in this area, compared to second quarter 2003 data, ranged from 5 to 10 feet, The groundwater elevations in this area were likely influenced by the presence of flowing water through the Cross Valley Canal and the Kern River, located south of the Site, before and during the August 2003 sampling event. The current average depth to water is approximately 79 feet bgs. 5.2 Separate Phase Hydrocarbon Occurrence Shell routinely gauges monitoring wells quarterly for the presence of SPH and to determine static H:\Projects~SHEL_L~Bakersfleld\Final\077-030~3Q '03 ReportL3Q'03rpt.doc 5-1 groundwater levels. Of the 242 groundwater monitoring wells gauged during the third quarter of 2003, three wells contained SPH. SPH was detected Jn wells B-012, B-109-M, and B-109L at thicknesses of 3.27, 0.2, and 0.3 feet, respectively. 5.3 Results of Laboratory Analyses of Groundwater Samples Analytica! results fOr each groundwater zone are provided in the following sections. 5.3.1 Shallow Zone Groundwater Analytical Results The results of laboratory analyses of groundwater samples collected from the Shallow Zone indicated the presence of TPH-G in 20 of the 57 Shallow Zone monitoring wells (B-030M, B- 041M, B-041U, B-108M, B-111M, B-116M, B-117M, B-118M, B-170M, B-171U, B-181U, D2, MNlZ, MN2AU, MS2.5A, R1, R4, R6B, RS-6A, and WIP-W3A) during the August 2003 quarterly monitoring event. TPH-G concentrations ranged from 300 ug/L in the sample from Well B-041M to 140,000 ug/L in the sample from Well D2. Benzene, toluene, ethylbenzene, or xylene (BTEX) was detected in the groundwater samples from 18 of the 57 Shallow Zone monitoring wells (B-041U, B-108M, B-111M, B-116M, B-117M, B-118M, B-170M, B-195U, D2, MN1Z, MN2AU, MS2.5A, R1, R4, R6B, RS-6A, RS-HC7, and T9A) during the August 2003 quarterly monitoring event. The highest concentration of BTEX compounds was detected in the sample from Well D2. MTBE was detected in the groundwater samples from 14 of the 57 Shallow Zone monitoring wells (B-116M, B-120M, B-170M, B-171U, B-179U, B-180U, B-181U, B~182U, B-195U, D2, MN1Z, R1, T9A, and WlP-W3A) during the August 2003 quarterly monitoring event, MTBE concentrations ranged from 1.7 ug/L in the sample from Well T9A to 12,000 ug/L in the sample from Well B-181U. The third quarter 2003 MTBE and benzene plume isoconcentration contour maps for groundwater less than 110 feet bgs are included as Figures 6 and 10, respectively. Laboratory analytical results are summarized in Table 3a. Laboratory analytical results and chain-of-custody documentation are included in Appendix B, 5.3.2 Intermediate Zone Groundwater Analytical Results The results of'laboratory analyses of groundwater samples collected from the Intermediate Zone indicated the presence of TPH-G in five of the 58 Intermediate Zone monitoring wells (B-041L, B-042, B-075M, B-108L, and RS-MN1Z). TPH-G concentrations ranged from 2,000 ug/L in the sample from Well. B-041L to 28,000 ug/L in the sample from Well B-042. BTEX was detected in the groundwater samples from 9 of the 58 Intermediate Zone monitoring wells (B-041L, B-042, B-044L, B-075M, B-108L, B-111L, B-188M, PW-L26, and RS-MN1Z) during the August 2003 quarterly monitoring event. The highest concentration of BTEX compounds was detected in the sample from Well B-042. H:~Projects~SHELL\Bakersfield~FinaJ\077,030~3Q '03 Report~3Q'03rpt.doc 5-2 MTBE was detected in the groundwater samples from 6 of the 58 Intermediate Zone monitoring wells (B-098L, B-126M, B-179M, B-187M, B-188M, and RS-MN1Z) during the August 2003 quarterly monitoring event. MTBE concentrations ranged from 1.8 ug/L in the sample from Well B-188M to 69 ug/L in the sample from Well B-179M. The third quarter 2003 MTBE and benzene plume isoconcentration contour maps for groundwater between 110 and 140 feet bgs are included as Figures 7 and 11, respectively. Laboratory analytical results are summarized in Table 3a. Laboratory analytical results and chain-of-custody documentation are included in Appendix B. 5.3.3 Deep Zone Groundwater Ana~lytical Results The results of laboratory analyses of groundwater samples collected from the Deep Zone indicated the presence of TPH-G in 14 (B-011, B-013, B-023, B-043, B-116L, B-117L, B-124L, B-164L, B-175L, B-175M, B-175U, B-177M, B-177U, and RS-DP4) of the 50 Deep Zone monitoring wells. TPH-G concentrations ranged from 110 ug/L in the sample from Well RS-DP4 to 34;000 ug/L in the sample from Well B-117L. BTEX was detected in the groundwater samples from 12 of the 50 Deep Zone monitoring wells (B-011, B-013, B-043, B-116L, B-117L, B-118L, B-172M, B-175L, B-175M, B-175U, B-177M, and B-177U) during the August 2003 quarterly monitoring event. The highest concentration of BTEX compounds was detected in the sample from Well B-117L. MTBE was detected in the groundwater samples from 12 of the 50 Deep Zone monitoring wells (B-011, B-116L, B-124L, B-172M, B-172U, B-173U, B-175L, B-177U, B-181L, B-185L, B-185M, and B-188L) during the August 2003 quarterly monitoring event. MTBE concentrations ranged from 1.2 ug/L in the sample from Well B-181L to 230 ug/L in the sample from Well B-124L. The third quarter 2003 MTBE and benzene plume isoconcentration contour maps for groundwater deeper than 140 feet bgs are included as Figures 8 and 12, respectively. Laboratory analytical results are summarized in Table 3a. Laboratory analytical results and chain-of-custody documentation are included in Appendix B. 5,3.4 Groundwater Supply Well Analytical Results TPH-G, BTEX, and MTBE were not detected in any of the eight water supply wells sampled in August 2003. MTBE and benzene result maps for the third quarter 2003 are included as Figures 9 and'13, respectively. Laboratory analytical results are summarized in Table 3b. Laboratory analytical results and chain-of-custody documentation are included in Appendix B. 5.3.5 Area 3 Well Groundwater Analytical Results The results of laboratory analyses of groundwater samples collected from the four Area 3 wells indicated the presence of petroleum hydrocarbons at concentrations ranging from ND (100) to 2,200 ug/L for TPH,G, ND (0.5) to 510 ug/L for benzene, ND (1,0) to 11 ug/L for toluene, ND (1.0) to 2 .ug/L for o-xylene, ND (1.0) to 6.2 ug/L for p/m.xylene, and ND (1.0) to 49 ug/L for MTBE. Ethylbenzene was not detected in groundwater samples collected from Area 3 wells. H:\Projects\SHELL\Bakersfield\Final\077-030L3Q '03 ReportL3Q'03rpt.doc 5-3 The highest concentration of petroleum hydrocarbon compounds was detected in Well A3-03, located along the southern/central portion of the property, north of Meridian Avenue. A figure showing Area 3 and third quarter 2003 analytical results for Area 3 wells is included as Figure 15. Laboratory analytical results for Area 3 wells are summarized in Table 3a. Laboratory analytical results and chain-of-custody documentation are included in Appendix B. 5._4_ Quality Assurance/Quali~ Control Results (QA/QC) As pad'of QA/QC procedures for water-quality sampling, a set of field blanks and a set of equipment blanks were collected with each set of groundwater samples to verify the accuracy of the data generated during the August 2003 sampling event. Twelve equipment blanks and one field blank were analyzed in the third quarter 2003 groundwater sampling event, With the exception of the equipment blank collected from Well B-117, gasoline range petroleum hydrocarbons and aromatic volatiles (including MTBE) were not detected in the equipment blank and field blank samples above laboratory analytical method detection limits. The equipment blank sample collected from Well B-117 contained o-xylenes and p/m- xylenes at concentrations of 1.4 and 4,1 ug/L, respectively. MS/MSD results for all compounds were generally within control parameters. Two sample analyses (out of 72 samples total) were out of control parameters due to matrix interference. The corresponding LCS/LCD results were Within control parameters. LCS/LCSD results for all compounds were generally within control parameters. Third quarter 2003 groundwater quality assurance results are summarized in Table 4. Laboratory analytical results and chain.of-custody documentation for groundwater quality assurance samples are included in Appendix B. 5.5 Results of Field DO/ORP Readings Field analyses' of groundwater during well purging generally indicate the presence Iow (<1 milligrams per liter [mg/L]) DO and Iowto negative values for ORP in groundwater within and in the vicinity of the Blending Area and Refinery 2 benzene plumes in the Shallow Zone (wells D2, RS-6A, R6B, RS-HC7, B-111M, MS2.5A, MN2AU, MN1Z, B-030M, B-041U, R2, R4, B-118M, B- 117M, B-116M, B-108M), Intermediate Zone (B-075M, B-41L, B-042, B-111L, RS-MN1Z, B- 108L, ), and Deep Zone (B-011, B-013, RS-DP4, B-043, B-175U/M/L, B-177U/M, B-173L, B- 117L, B-118L, B-116L). Low ORP and DO values measured in these wells indicate the presence of consistent reducing conditions within the benzene plumes in all three water-bearing zones. These readings correspond to the range of values that can be expected to support iron reducing, sulfate'reducing, and methanogenic conditions. H:~Projects'~SHELL~Bakersfield~Final~O77-O30~3Q '03 Report',3Q'03~pt.doc 5-4 Outside of the benzene plume boundaries, DO readings generally increase to greater than 10 mg/L with ORP readings greater than 50 millivolts (mV) across the Site in each water-bearing zone. The highest DO/ORP readings were observed in wells located in the vicinity of the Calloway Canal. DO/ORP readings decrease slightly in the Shallow Zone's northern MTBE plume, DO/ORP readings, shown in conjunction with the benzene and MTBE plume contours for Shallow Zone, Intermediate Zone, and Deep Zone groundwater, are included as Figures 16, 17, and 18, respectively. H:\Projects~SHELL\Bakersfield\Final\077-030~3Q '03 Repod~3O'03rpt.doc 5-5 6.0 CONCLUSIONS The following conclusions are based on the third quarter 2003 field observations, laboratory results, and available Site information: Groundwater elevations indicate subsurface groundwater flow directions to the west/northwest across the Site in Shallow, Intermediate, and Deep Zone groundwater monitoring wells. Subsurface groundwater flow directions observed in August 2003 were similar to those observed in the May (Second Quarter) 2003 monitoring event. The observed hydraulic gradients estimated for the August 2003 monitoring event were 0.012 ft/ft in the Shallow Zone, 0.0097 ft/ft in the Intermediate Zone, and 0.0093 ft/ft in the Deep Zone. Measurable SPH was observed in wells B-012, B-109.M, and B-109L at thicknesses of 3.27, 0.2, and 0.3 feet, respectively, SPH thicknesses were similar to those observed during the May 2003 monitoring event. Extensive subsurface investigation has delineated the Terminal's dissolved- phase MTBE plume as being approximately 2,700 feet long and up to 600 feet wide in the Shallow Zone (<110 feet bgs). MTBE was not detected above laboratory method detection limits of 1 ug/L in the Terminal plume's Intermediate and Deep Zone groundwater monitoring ~ells during the third quarter 2003 quarterly sampling event, with the exception' of Iow concentrations of MTBE detected in Intermediate Zone wells B-126M (2.0 ug/L), and B-176U (10 ug/L), and Deep Zone well B.181L (1.2 ug/L). The Blending Area's Shallow Zone dissolved-phase MTBE plume size decreased between the second and third quarter 2003 monitoring events. Wells B-182U and B-179U contained 39 and 78 ug/L MTBE during the second quarter 2003 monitoring event; however, these wells were non-detectable (ND)'for MTBE in the third quarter 2003 monitoring event. Both the Terminal and Blending Area's dissolved-phase MTBE plumes trend in an east to west direction, following the local groundwater gradient (accentuated by groundwater extraction in the case of the Terminal plume), with limited north- . south expansion over time. No appreciable eastward migration (up-gradient) of the dissolved-phase MTBE plumes has been observed. Dissolved-phase benzene plumes (from the reformate leaks) are located in the Blending Area and the northwestern portions of the Area 2 Refinery. During the August 2003 quarterly groundwater monitoring event, the Blending Area dissolved-phase benzene plume was a maximum of 500 feet long and up to 700 feet wide in the Shallow Zone, 250 feet long and up to 150 feet wide in the Intermediate Zone, and 1,900 feet long and up to 700 feet wide in the Deep Zone. H:\Projects\SHELL~akersfield\Final\077-O30\3Q '03 Reporl\3Q'03rpt.doc 6-1 During the third quarter of 2003, the Area 2 Refinery's dissolved-phase benzene plume was a maximum of 2,500 feet long and up to 1,800 feet wide in the Shallow Zone, 3,000 feet long and up to 1,800 feet wide in the Intermediate Zone, and 3,000 feet long and up to 1,100 feet wide in the Deep Zone. Both the Blending and Refinery 2 Area's dissolved-phase benzene plumes trend in an east to west direction. The down-gradient portions of the Refinery 2 Area's Shallow and Intermediate Zone plumes exhibit some lateral (north and south) migration of dissolved-phase benzene. No appreciable eastward migration (up- gradient) of the dissolved-phase benzene plumes has been observed, Water supply wells did not contain detectable concentrations of petroleum hydrocarbons. Detectable concentrations of petroleum hydrocarbons in Area 3 groundwater monitoring well A3-03 increased from 290 to 2,200 ug/L for TPH-G, 88 to 510 ug/L for benzene, 3 to 11 ug/L for toluene, and 9 to 49 ug/L for MTBE, Concentrations of petroleum hydrocarbons in Well A3-04 remained stable and remained ND in wells A3-01 and A3-02., , H:\Projects\SHELL\Bakersfield\Final\077-030~3Q '03 Report~3Q'03rpt.doc 6-2 7.0 WORK PROPOSED FOR NEXT QUARTER (FOURTH QUARTER 2003) The following activities are proposed to be conducted at the Site during the fourth quarter of 2003: · Routine operation and maintenance of air sparge, VES, and IRM systems at the site; · Perform the fourth quarter 2003 groundwater gauging and sampling event; and · Submittal of the Third Quarter 2003 NPDES and Groundwater Monitoring Reports, H:\Projects~SHELL\Bakersfleld\Final~077-030~3Q '03 Report~3Q'03rpt.doc 7-1 8.0 REFERENCES Dale, R.H., French, J.J., and Gordon, G.V., 1966, Ground-water Geology and Hydrology of the Kern River AIluviaI-Fan Area, California: United States Geological Survey. Bertoldi, G.L., Johnston, R.H., and Evenson, K.D., 1991, Ground Water in the Central Valley, California- A Summary Repo~ United States Geological Survey, Professional Paper 1401 -A. H:~Projects\SHELL~Bakersfleld~Final~077-O30~3Q '03 Report\3Q'03rpt.doc 8-1 TABLES H:\Projects\SHELL\Bakersfield~Final\077-030~Q '03 Report~3Q'03rpt.doc TABLE 1 SHELL OIL PRODUCTS U.S. THIRD QUARTER 2003 GROUNDWATER MONITORING SUMMARY Facility Location: Facility Contact: Primary Consultant/Contact Person Lead Regulatory Agency Lead Regulatory Agency Contact: 6451 Rosedale Highway, Bakersfield, Ca 93306 Steve Overman (661) 326-4351 - TriHydro COrPoratiOn / L. inda Barnes (307) 745-7474 Regional Water Quality Control Board ? Central Valley Region, FreSno Office Mr. Anth0n~' Medrano (559) 488-4395 Current Project Phase: Frequency of Monitoring/Sampling: Groundwater Investigation, Interim Remediation, Ongoing Remediation (Refinery VES, Groundwater Extraction and Treatment, and Air Sparge Systems), Groundwater Monitoring Quarterly gauging of 242 wells / sampling of 177 wells Depth to Groundwater Range in Third Quarter of 2003 (Refinery Areas 1 and 2): Groundwater Gradient: Groundwater Gradient Consistent with Previous Quarter: MTBE Concentration Range: 56.63' (U4)'& 115.61' (B-131L2) bgs (On average, groundwater table dropped approximately 0.06 feet in the third quarter 2003) 0.012 ft/ft westerly to northwesterly~n the <110' bgs zone 0.0097 ft/ft northwesterly in the 110'- 140' bgs zone 0.0093 ft/ft northwesterly in the >140' bgs zone Gradient Slightly shallower in 110'- 140' bgs zone, subsurface groundwater flow direction unchanged <1 - 12,000 ug/L Well with Highest MTBE Concentration: B-181U <0.5 - 11,000 ug/L ' <100- 140,000 ug/L D2 0.2 - 3.7 feet B-012, B-109L, B-109M D-l, D:2~ D-3, D-4, D-S, D-6, D-7, I-1, I-2, 1'3~ I-4, i:5~ I-6, i- 7, I-8, I-9, 1-10, 1-11, 1-12, 1-13, 1-14, 1-15, 1-16, P-31 Benzene Concentration Range: Well with Highest Benzene Concentration TPHG Concentration Range: Well with Highest TPHG Concentration; Separate Phase Hydrocarbon Thickness Range: Wells with Separate Phase Hydrocarbons Present Water Supply Wells within 2,000 feet of the Site: Surface Water within 2,000 feet of the Site: Remediation Techniques: Separate Phase Hydrocarbons recovered in 3~d Quarter 2003: Agency Directives: Calloway Canal 500' nOrthwest of Area 1 Refinery, 1,500' northwest of Area 2 Refinery · Soil Vapor Extraction, Groundwater Extracti°n' and Treatment, and Air Sparging 4,216 gallons from the refinery VES system None H:\Projects\SHELL\Bakersfield\Final\077-030~3Q '03 Report\table1 .doc Measurement Well ID Date Time Table 2 3rd Quarter - Groundwater Levels Shell Oil Products U. S. Bakersfield, California Elevation (ft Depth to Product Depth to MSL) Product (ft) Thickness ,(ft) Water (ft) Piezometric Elevation (ft MSL) Screen InterVal (ft Ibgs) Field Readings Start Depth End Depth DO (mg/L) ORP (mV) A3-01 08/12/2003 12:07 A3,02 08/12/2003 11:43 A3-03 08/12/2003 11:59 A3-04 08/12/2003 12:17 B,00IL 08/~ 1/2003 08:57 B-001M 08/~2/2003 12:30 B~001U 08/~ 2/2003 12:33 B~003 08/~ 1/2003 11:18 B-007 08/12/2003 09:22 B-008 08/12/2003 10:43 B-009 08/11/2003 11:29 B-010 08/12/2003 07:34 B-011 08/12/2003 09:59 B-012 08/11/2003 14:15 B-013 08/12/2003 09:43 B-014 08/12/2003 08:24 B-017 08/12/2003 08:1 ~ B-023 08/11/2003 12:03 B-024L 08/12/2003 07:53 B-024U 08/12/2003 07:55 B-030M 08/12/2003 10:30 B-030U 08/12/2003 10:32 B-041 L 08/12/2003 10:52 B-041M 08/12/2003 10:54 B-041U 08/12/2003 10:56 B-042 08/11/2003 10:51 B-043 08/I 1/2003 12:12 B-044L 08/11/2003 10:42 B-044M 08/11/2003 10:44 B-044U 08/11/2003 10:48 B-050L 08/11/2003 11:22 400.53 ...... 46.35 354.18 28.00 48:00 4.1 167 394.89 ...... 65.41 329.48 46.00 66.00 3.4 181 399.62 ...... 59.54 340.08 44.00 64.00 0.9 175 399.01 ...... 51.97 347.04 35.00 55.00 0.5 101 388.35 ...... 97.81 290.54 145.00 200.00 8.8 78 390.40 ..... 91.71 298.69 100.00 140.00 8.6 60 390.38 ...... Dry -- 30.00 90.00 -- -- 388.74 ...... 94.35 294.39 140.00 180.00 6.9 87 383.60 ...... 108.65 274.95 140.00 180.00 4.8 64 388.27 ...... 101.81 286.46 143:00 183.00 0.3 48 380.77 ...... 97.86 282.91 143.00 183.00 0.1 12 383.10 ...... 110.56 272.54 150.00 190.00 -- ~ 387.53 ...... 107.45 280.08 155.00 195.00 0.1 -90 388.47 85.18 3.27 88.45 300.02 144.36 184.36 386.34 ..... 107.56 278.78 174.00 194.00 0.1 -1'99 385.21 ..... 96.74 288.47 140.00 180.00 3.1 51 383.53 ...... 110.25 273.28 180.00 200.00 ,0.2 90 383.08 ...... 86.65 296.43 136.00 176.00 --- ~ 384.45 ...... 109.13 275.32 162.70 182.70 .... 384.45 ...... 75.55 308.90 120.00 150.00 .... 388.08 ..... 93.60 294.48 101.50 122.00 0.2 -55 388.08 ..... Dry ~ 74.50 95.00 .... 382.37 ...... 87.05 295.32 129.61 149.61 0.2 -61 382.37 .... 84.83 297.54 101.73 121.73 0.2 -80 382.37 .... 85.17 297.20 73.82 93.82 0.5 -86 389.86 ...... 75.92 313.94 114.56 154.56 0.6 -94 390.79 ...... 87.16 303.63 130.00 170.00 1 -80 388.40 ..... 90.44 297.96 115.00 135.00 12.5 39 388.40 ...... 90.53 297.87 88..00 108.00 5.8 167 388.40 ...... Dry ~ 63.'00 '83.00 -- ~ 390..62 ...... 86.85 303.77 114.00 134.00 5.5 145 H:/Project~Shell/Bakersfield/Final/O77-O30.'3Q '03Repor/.iTabte 2 - 3rd Quarter. Ms Measurement Well ID Date Time Table 2 3rd Quarter - Groundwater Levels Shell Oil Products U. S. Bakersfield, California Elevation (ft Depth to Product Depth to MSL) Product (ft) Thickness (ft) Water (ft) Piezometric Elevation (ft MSL) Screen ~nterval (ft ibgs) Field Readings Start Depth End Depth DO (mgfL) ORP (mV) B-050M 08/11/2003 11:24 B-050U 08/11/2003 11:26 B-052L 08/12/2003 08:43 B-052M 08/12/2003 08:45 B-052U 08/12/2003 08:47 B-075L 08/12/2003 11:26 B-075M 08/12/2003 11:28 B-098L 08/11/2003 10:13 B-098M 08/11/2003 10:15 B-098U 08/11/2003 10:17 B-099L 08/12/2003 08:29 B-099M 08/12/2003 08:31 B~099U 08/12/2003 08:33 B- 100L 08/12/2003 08:16 B-100M 08/12/2003 08:18 B- 100U 08/12/2003 08:20 B- 103L 08/12/2003 09:16 B-103M 08/12/2003 09:18 B-103U 08/12/2003 09:20 B-104L 08/12/2003 07:41 B-104M 08/12/2003 07:43 B-104U 08/12/2003 07:45 B-105L 08/11/2003 10:27 B-105M 08/11/2003 10:28 B-106L 08/11/2003 10:37 B- 106M 08/11/2003 10:38 B- 107L 08/11/2003 15:51. B- 107M 08/11/2003 15:52 B- 108L 08/11/2003 10:44 B-108M 08/11/2003 10:46 B-1.09L 08/11/2003 14:35 390.37 ...... 86.73 303.64 86.00 106.00 3.7 199 390.98 ...... Dry -- 61.00 81.00 .... 388.00 ...... 100.47 287.53 135.00 175.00 0.2 18 388.00 ...... 97.38 290.62 108.00 128.00 0.2 28 388.00 ...... 97.87 290.13 83:00 103.00 1.3 209 384.35 ...... 59.65 324.70 131:00 150.00 -- ~ 384.35 ...... 79.22 305.13 105:00 125.00 0.2 -74 384.79 ..... 79.98 304.81 109.81 140.00 0:2 - 120 384.79 ..... 78.88 305.91 79.82 109.82 0.2 -88 384.79 ...... Dry ~ 49.83 79.83 ~ -- 385.35 ...... 95.66 289.69 110.00 140.00 0.4 - 1 385.35 ...... 94.49 290.86 80.25 110.25 1.4 17 385.35 ...... Dry ~ 50.00 80.00 .... 384.91 ...... 89.26 295.65 110.00 140.00 0.2 42 384.91 ...... 89.40 295.51 80.25 110.25 2.2 76 384.91 ...... Dry -- 50.00 80.00 ~ -- 383.73 ....... 86.82 296.91 110.00 140.00 383.73 ....... 89.10 294.63 80.25 110.25 383.73 ...... Dry ~ 50.00 80.00 ~ -- 385.26 ...... 81.33 303.93 110.00 140.00 ~ -- 385.26 ...... 77.55 307.71 80.25 110.25 19.7 128 385.26 ...... 76.98 308.28 50.00 80:00 .6.6 235 387.58 ...... 61.81 325.77 95.00 125.00 7.8 80 387.58 ..... 59.15 328.43 65.00 95.00 1.1 -68 386.23 .... 61.28 324:95 110.00 140.00 8.4 82 386.23 ..... 60.13 326.10 80.00 110.00 7.3 81 390.51 ..... 65.85 324.66 110.00 140.00 7.7 80 390.51 ...... 64.55 325.96 80.00 110.00 6.6 68 388.61 ..... 70.65 317.96 110.00 140.00 0.3 -19 388.61 ..... 68.18 320.43 80:00 110.00 0.4 -69 389.11 73.08 0.30 73.3'8 315.73 110.00 140.00 ..... H:/Projects/Shel~/Bakersfield/FinaV077-030/3Q ~3Reportfrable 2 - 3rd Quarter. xls Measurement · Well ID Date Time Elevation (ft MSL) Table 2 3rd Quarter -Groundwater Levels Shell Oil Products U. S. Bakersfield, California Depth to Product Depth to Product (ft) Thickness (ft) Water (ft) Piezometric Elevation (ft MSL) Screen Interval (ft bgs) Field Readings Start Depth End Depth DO (mg/L) ORP (mV) B-109M 08/11/2003 14:38 B-110L 08/11/2003 10:22 B-110M 08/11/2003 10:25 B-I 11L 08/11/2003 11:32 B-111M 08/11/2003 11:34 B- 114L 08/12/2003 09:05 B-I 14M 08/12/2003 09:07 B-114U 08/12/2003 09:09 B- 115L 08/12/2003 08:53 B- 115M 08/12/2003 08:55 B- 115U 08/12/2003 08:57 B- 116L 08/11/2003 15:17 B-116M 08/11/2003 15:19 B-117L 08/11/2003 15:10 B-117M 08/11/2003 15:11 B-118L 08/11/2003 14:55 B-118M 08/11/2003 15:02 B-119L 08/11/2003 09:45 B-119M 08/11/2003 09:47 B-120L 08/11/2003 09:58 B-120M 08/11/2003 10:00 B-121M 08/11/2003 09:52 B-124L 08/11/2003 10:32 B-124M 08/I 1/2003 10:35 B-124U 08/11/2003 10:37 B-125L 08/11/2003 10:01 B- 125M 08/11/2003 10:03 B- 125U 08/11/2003 10:05 B- 126L 08/11/2003 09:28 B- 126M 08/11/2003 09:30 B-126U 08/11/2003 12:52 B-127L 08/11/2003 11:47 389.11 70.59 0.20 70.79 318.32 392.49 ...... 69.07 323.42 392.47 ...... 68.85 323.62 381.34 ....... 68.60 312.74 381.34 ...... 68.03 313.31 387.19 ...... 94.13 293.06 387.19 ...... 94.31 292.88 387.19 ...... Dry m 387.38 ...... 96.35 291.03 387.38 ...... 96.13 291.25 387.38 ...... Dry m 389.46 ..... 73.29 316.17 389.49 ...... 71.31 318.18 393.32 ..... 79.32 314.00 393.34 ..... 77.67 315.67 393.06 ...... 76.61 316.45 392.99 ...... 75.21 317.78 389.46 ..... 75.46 314.00 389.56 ...... 74.11 315.45 388.74 ...... 83.62 305.12 388.76 ...... 80.58 308.18 390.88 ...... 82.36 308.52 390.20 ...... 98.08 292.12 390.16 ..... 92.62 297.54 389.96 ..... Dry -- 391.32 ..... 108.44 282.88 391.36 ..... 102.05 289.31 391.47 ..... Dry m 389.16 ..... 103.15 286:01 389.33 ...... 99.64 289.69 389.47 ..... :- Dry m 392.55 ...... 104.41 288.14 78.00 108.00 ...... 110.00 140~00 0.2 -66 80.00 110.00 0.3 -22 100..00 130.00 0.9. -37 70:00 100.00 0.7 -66 120.00 150.00 9.5 10 85.00 115.00 -- -- 40.00 80.00 ~ ~ 120.00 150:00 3.3 48 85.00 115.00 2.7 55 40.00 80.00 --- m 165.00 175.00 0.3 -74 100.00 110.00 0.3 -114 165.00 175.00· 0.3 -92 100.00 110.00 0.4 -84 165.00 175.00 0.4 -85 100.00 110.00 0.4 -61 163.,00 173.00 ~ ,- 100.00 110.00 m -- 165.00 175.00 0.2 95 100.00 110.00 0.2 63 100.00 135.00 6.7 77 160.00 200:00 4.4 52 120.00 140:00 2.6 34 30.00 90:00 160.00 185:00 9.1 94 125.00 150.00 5.7 97 30.00 70.00 m ~ 160.00 180.00 11.9 146 110.00 140.00 9.6 140 30.00 80.00 .... 160.00 185.00 12.8 58 H:/Projects~hell/Bakersfleld/Final/O77-O30/3Q"O3ReporVTable 2 - 3rd Qumter. xls Measurement Elevation (ft Well ID Date Time MSL) B- 127M 08/11/2003 11:50 392.61 B-127U 08/I 1/2003 11:53 392.62 B-128L 08/11/2003 13:10 395.85 B- 128M 08/11/2003 13:13 395.90 B-128U 08/11/2003 13:16 395.96 B-129L1 08/11/2003 10:37 391.50 B-129L2 08/11/2003 10:39 391.31 B-129M 08/11/2003 10:41 391.67 B- 12913 08/11/2003 10:43 391.85 B- 130L 1 08/11/2003 10:48 392.04 B-130L2 08/I 1/2003 10:50 392.29 B-130M 08/11/2003 10:52 391.91 B-130U 08/11/2003 10:54 391.86 B-13 ILl 08/I 1/2003 10:22 391.17 B-131L2 08/11/2003 10:24 391.13 B-13 IM 08/I 1/2003 10:28 391.32 B- 131U 08/11/2003 10:31 391.31 B-133 08/11/2003 11:14 393.06 B-134 08/11/2003 09:47 392.87 B- 143 08/11/2003 13:40 389.27 B-144 08/11/2003 14:33 390.30 B- 145 08/11/2003 14:13 391.69 B-146 08/11/2003 13:30 393.21 B-150M 08/11/2003 11:35 388.94 B- 153 '08/12/2003 13:10 391:07 B-154 08/12/2003 13:13 391.76 B-155 ,08/11/2003 13:57 390.31 B- 156 '08/11/2003 14:29 390.91 B-157 08/11/2003 14:07 392.42 B- 158 08/11/2003 13:27 392.15 Table 2 3rd Quarter - Groundwater Levels Shell Oil Products U. ;S. Bakersfield, California Depth to Product Product (ft) Thickness (ft) Depth to Water (ft) 101:28 Dry 97.94 95.96 Dry 110.55 111.00 104.78 Dry 113.20 113.62 106.68 Dry 115.27 115.61 106.08 Dry Dry Dry Dry Dry Dry Dry 90.37 Dry Dry Dry Dry Dry Dry Screen Interval (ft bgs) Piezometric Elevation (ft MSL) Start Depth End 'Depth 291.33 115.00 140.00 -- 30.00 80.00 297.91 162.00 182.00 299.94 110.00 140.00 m 30.00 70.00 280.95 180.00 200.00 280.31 235.00 245.00 286.89 120.00 145.00 m 30.00 90.00 278.84 180.00 200.00 278.67 235.00 245.00 285.23 125 .~00 145.00 ~ 30:00 90.00 275.90 190:00 210.00 275.52 243.00 253.00 285.24 120.00 145.00 -- 30.00 85.00 -- 30.00 '90.00 -- 30.00 90.00 -- 40.00 75.00 N 40.00 75.00 ~ 40.00 75.00 -- 40.00 75.00 298.57 90.00 110.00 t 35~00 75.00 t 35:00 75.00 ~ 34.00 74.00 ~ 35.00 75.00 -- 35.00 75.00 ~ 35.00 75~00 Field Readings DO (mg/L) 7.8 10.8 10.5 6.3 6.1 4.9 9.4 11.1 7.1 2.2 1.8 2.1 6.7 om, ,(my) 71 126 125 74 101 108 120 109 128 173 192 169 17 H:/Projects/Shell/Bakersfleld/FinaVO77-O30/3Q '03Report/Table 2 - 3rd Quarter. Ms Measurement Elevation (ft Well ID Date Time MSL) B-159 08/11/2003 14:21 390.31 B-160M 08/11/2003 12:06 393.96 B- 160U 08/,11/2003 12:10 393.88 B- 161M 08/11/2003 11:53 393.08 B-161U 08/11/2003 12:00 392.95 B- 162M 08/11/2003 12:21 398.25 B- 162U 08/11/2003 12:24 398.37 B-163M 08/11/2003 11:59 398.07 B-163U 08/11/2003 12:02 398.01 B-164L 08/11/2003 12:11 398.71 B-164M 08/11/2003 12:13 398.81 B-164U 08/11/2003 12:16 398.96 B-166L 08/11/2003 09:52 390.04 B- 166M 08/11/2003 09:54 390.11 B-166U 08/11/2003 09:57 390.30 B-167L 08/11/2003 09:39 391.59 B- 167M 08/11/2003 09:41 391.67 B- 167U 08/11/2003 09:43 391.75 B- 168L 08/11/2003 11 '.23 389.77 B-168M 08/11/2003 11:26 389.78 B-169L 08/11/2003 11:30 391.41 B- 169M 08/11/2003 11:33 391.47 B- 169U 08/11/2003 11:35 391.56 B-170L 08/11/2003 12:16 389.75 B- 170M 08/11/2003 12:18 389.86 B- 170U 08/11/2003 12:20 389.95 B-171L 08/11/2003 12:07 392.87 B- 171M 08/11/2003 12:09 392.95 B-171U 08/11/2003 12:11 392.96 B-172L 08/11/2003 10:04 382.96 B- 172M 08/11/2003 10:06 383.01 Table 2 3rd Quarter - Groundwater Levels Shell Oil Products U. S. Bakersfield, California Depth to Product (ft) Screen Interval (ft,bgs) Piezometric Product Depth to Elevation (ft Thickness (ft) Water (ft) MSL) Start Depth End Depth --- Dry -- 35:00 75.00 --- 94.06 299.90 .90.00 105.00 --- Dry -- 60.00 80.00 --- 99.57 293.51 110.00 120:00 --- Dry M 75.00 85.'00 .... 102.37 295.88 l 15.00 125.00 --- Dry M 80.00 100.00 --- 104.88 293.19 116.00 126.00 --- Dry ~ 68.00 88.00 -- 103.59 295.12 114.00 134.00 --- Dry -- 89.50 104.00 --- Dry -- 64.00 84.00 --- 109.50 280.54 170.00 185 --- 105.05 285.06 120.00 140:00 --- Dry ~ 70.00 95.00 --- 111.68 279.91 160.00 180.00 ..... 108.32 283.35 120:00 140.00 ...... Dry ~ 70.00 105.00 ...... 107.99 281.78 160.00 180.00 ...... 103.88 285.90 118.00 138.00 ...... 106.32 285.09 150.00 170:00 ..... 103.54 287.93 120.00 140.00 ...... 102.98 288.58 90.00 110.00 ...... 100.79 288.96 125.00 140.00 ...... 100.76 289.10 108.00 118.00 ...... Dry M 92.00 102.00 ...... 93.35 299.52 154.00 164.00 ...... 103.26 289.69 120.00 140.00 ...... 90.37 302.59 80.00 100.00 ...... 83.97 298.99 235.00 245.00 ...... - 82.16 300.85 176.00 196.00 Field Readings DO (rog/L) 5.1 4.5 5.1 4.4 7.9 8.8 14.9 7.7 14.4 9.9 5.9 9.1 1.4 8.2 2.5 0.1 :oaP (rev) 107 178 211 208 81 137 108 72 149 138 180 174 60 153 177 144 60 I-i:/Pmjects/Shet!/Bakersfield/Final/077-030/3Q '03ReportiTable 2 - 3rd Quarter.xls Well ID B- 172U B-173L B-173M B-173U B-175L B-175M B-175U B-176L B-176M B-176U B-177L B-177M B-177U B-178M B-178U B-179M B-179U B-180L B-180M B-180U B-181L B-181M B-181U B-182M B-182U B-185L B-185M B-185U B-186L B-186M B-1,86U B-187L Measurement Elevation (ft Date Time MSL) 08/11/2003 10:08 383.07 08/11/2003 09:50 385.79 08/11/2003 09:52 385.85 08/11/2003 09:54 385.88 08/12/2003 11:18 388.00 08/12/2003 11:20 388.07 08/12/2003 11:22 388.24 08/11/2003 13:51 391.14 08/11/2003 13:47 391.27 08/11/2003 13:49 391.29 08/12/2003 13:41 383.25 08/12/2003 13:43 383.32 08/12/2003 13:45 383.43 08/I 1/2003 11:41 385.25 08/11/2003 11:43 385.49 08/11/2003 10:01 383.03 08/11/2003 09:59 383.10 08/I 1/2003 12:25 390.06 08/11/2003 12:27 390.18 08/11/2003 12:29 390.30 08/11/2003 12:18 391.23 08/11/2003 12:20 391.30 08/11/2003 13:12 391.23 '08/11/2003 09:40 385.47 08/11/2003 09:37 385.54 08/11/2003 11:35 391.57 08/11/2003 11:37. 391.69 08/11/2003 11:39 391.79 08/11/2003 11:25 392.32 08/11/2003 1 ! :27 392.43 08/11/2003 11:29 392.56 08/11/2003 10:52 389.33 Table 2 3rd Quarter - Groundwater Levels Shell Oil Products U. S. Bakersfield, California Depth to Product Depth to Product (ft) 'Thickness (ft) Water fit) 81.67 87.81 86.75 86.46 84.30 81.69 81.30 95.34 94.37 92.82 78.00 77.20 76.66 85.38 84.49 79.84 78.96 101.32 98.80 98.20 98.98 97.59 92.99 83.30 82.67 103.22 103.27 99.03 105.41 105,39 101.00 97.10 Piezometric Elevation (ft MSL) · Screen Interval (ft ~bgs) Start Depth End Depth 301.40 148.00 168.00 297.98 225.00 240.00 299.10 190,00 210.00 299.42 150~00 170.00 303.70 210.00 225.00 306.38 172.00 192.00 306:94 140,00 160:00 295.80 175,00 190:00 296.90 145.00 160.00 298.47 115.00 135,00 305.25 222:00 232.00 306.12 172.00 192.00 306.77 144,00 164.00 299.87 115.00 120.00 301.00 90.00 95.00 303.19 113.00 133,00 304.14 76.00 106:00 288.74 150.00 170.00 291.38 125.00 140.00 292.1'0 95.00 115.00 292.25 150:00 165.00 293.71 125.00 140.00 298.24 90.00 110.00 302.17 120.00 135.00 302.87 85.00 105:00 288.35 190.00 205.00 288.42 165.00 180.00 292.76 126.00 146.00 286.91 182:00 202.00 287.04 ~65:00 175.00. 291.56 125:00 145.00 292.23 160.00 180.00 Field Readings DO (mg/L) 0.1 '0.2 0.1 0.1 0.1 14.7 7.2 0.2 0.2 6.6 4.1 0.2 0.1 11.4 9.1 5.2 7.9 9.2 1:6 0.2 0.6 0.1 0.1 0.1 6.2 5.4 11,4 3.7 om, (rev) 5O 48 -68 -65 .52 102 37 -61 -61 16 228 -97 -110 192 182 210 -60 154 41 45 -2 26 16 3 137 156· 165 95 H:/Projects~ShelFBakersfieJdiFinaFO77-O30/30 '03ReporFTable 2 - 3rd Quarter.xls Measurement Elevation (ft Well ID Date Time MSL) B- 187M 08/1 !/2003 10:54 389.60 B-187U 08/I 1/2003 10:56 389.80 B-188L 08/11/2003 11:01 388.57 B-188M 08/11/2003 11:03 388.72 B-188U 08/11/2003 11:05 389.12 B- 195L 08/I I/2003 13:00 389.67 B- 195M 08/~ 1/2003 13:02 389.44 B-195U 08/11/2003 13:05 389~36 B-196L 08/11/2003 10:09 388.42 B- 196M 08/1 ]/2003 10:12 388.51 B- 196U 08/11/2003 10:14 388.66 B-201 08/11/2003 13:05 394.16 B-202L 08/11/2003 13:26 388.62 B-202U 08/11/2003 13:28 388.64 D2 08/12/2003 10:21 388.29 D3 08/12/2003 11:10 378.44 DP2 08/11/2003 11:04 386.07 M14S 08/11/2003 11:14 391.55 MN1Z 08/12/2003 10:14 389.40 MN2AU 08/12/2003 09:38 387.50 MS2.5A 08/12/2003 11:04 384.62 PW-L23 08/11/2003 11:11 382.22 PW-L26 08/11/2003 11:22 381.18 PW-L28 08/11/2003 11:15 384.01 PW-U4 08/11/2003 11:00 388.16 R1 08/11/2003 13:25 383.42 R2 08/1 !/2003 13:35 387.20 R3 08/11/2003 13:45 388.70 R4 08/11/2003 14:06 390.04 R6B 08/11/2003 12:07 383.41 Table 2 3rd 'Quarter - Groundwater Levels Shell Oil Products U. S. Bakersfield, California Screen InterVal (ft !bgs) Piezometric Depth to Product Depth to Elevation (~ Product ,(R) Thickness (~) Water (~) MSL) Start Depth End Depth ..... '90.21 299.39 125.00 145.00 ...... 90.20 299.60 70.00 100.00 ..... 96.23 292.34 160.00 180.00 ...... 88.80 299.92 110.00 140.00 ...... 89.58 299.54 70.00 95.00 ...... 99.37 290.30 165.00 180.00 ...... 95.21 294.23 122.00 152.00 ...... 91.75 297.61 80.00 105:00 ..... 107.63 280.79 160.00 ]80.00 ..... 99.52 288:99 125.00 145:00 ..... 96.77 291.89 75.00 105.00 ...... 92.28 301.88 75.00 95.00 ..... 87.27 301.35 114:00 134.00 ..... 85.29 303.35 97.00 105.00 ..... 83.70 304.59 54.00 114.00 ...... 66.08 312.36 40.00 100.00 ...... 88.90 297.17 92.00 1'05.00 ...... Dry -- 70.00 90.00 ...... 96.95 292.45 14.00 104.00 ...... 80.94 306.56 20.00 80.00 ...... 75.45 309.17 18.00 108.00 ...... 59.54 322.68 I00.:00 144.50 ..... 64.03 317.15 90.'00 138.75 ..... 61.02 322.99 70:00 143.00 ....... 63.57 324.59 100.00 140.00 .... 74.36 309.06 12.00 105.00 ...... 75.26 311.94 12.00 117.00 ...... 74:95 313.75 ~2.00 117.00 ...... 80.98 309.06 12.00 117.00 --' --- 80.09 303.32 18.00 98:00 Field Readings DO (mg/L) 4.3 3.3 12.7 5.6 5.3 0.1 0.9 1.2 3.3 1.1 5.3 6.6 4:9 '0.8 0.2 8.1 0.8 0.6 0.5 9.8 4.8 0.7 8.1 0.6 0.5 0.2 0.6 ORP(mV) 71 53 4O 161 172 7 222' 94 109 179 98 56 225 -109 98 50 -108 -142 -50 48 78 -29 84 -80 -101 -90 -63 -70 H :/Pmject~Shell/Bakersfield/Final/O77-O30/3Q '03Repoll/'l'able 2 - 3rd Quaffer.)ds ~e~surement Well ID Date RS-6A 08/11/2003 RS-BW4 08/11/2003 RS-DP4 08/12/2003 RS-DP5 08/11/2003 RS-DP6 08/12/2003 RS-DP7 08/12/2003 RS-HC7 08/11/2003 RS-HC8 08/I 1/2003 RS-MN1Z ,08/12/2003 RS-MN2B 08/12/2003 RS-MS2.5C 08/12/2003 RS-MS3A 08/12/2003 T10A 08/12/2003 T16A 08/12/2003 T3B 08/12/2003 T8B 08/11/2003 T9A 08/11/2003 TR-2 08/12/2003 U4 08/I 1/2003 WIP-W1 08/11/2003 WIP-W2 08/11/2003 WIP-W2A 08/11/2003 WIP-W3A 08/11/2003 WIP-W4 08/11/2003 WIP-W4A 08/11/2003 Note: '--' = Not Applicable 'DO' = DisSOlved Oxygen 'ORP' = Oxidation Reduction Potential ~ngtL' = Milligrams Per Liter 'mV' = Millivolts Time Elevation (ft MSL) 13:32 379.99 13:56 385.30 09:53 386.27 11:38 381.07 10:46 387.07 09:32 385.77 11:43 381.43 11:50 385.60 10:16 387.54 09:49 385.36 07:49 384.26 08:04 384.71 13:20 391.45 12:59 390.03 13:04 391.92 13:50 390.22 13:54 390.40 13:30 390.73 10:58 386.86 13:20 387.39 13:34 388.43 13:30 388.28 14:47 390.67 13:01 389.58 14:40 389.61 Table 2 3rd Quarter - Groundwater Levels Shell Oil Products U. :S. Bakersfield, California Depth to Product Depth to Product (ft) Thickness (ft) Water (ft) ...... 70.48 ...... 86.93 ...... 97.46 ..... 71.56 ...... 96.60 ...... 74.22 ...... 71.05 ...... 69.14 ...... 98.20 ...... '88.90 ..... 71.20 ..... 82.15 ...... 84.92 ...... Dry ...... 84.65 ...... Dry ..... 84.83 ...... 83.10 ...... 56.63 ...... 68.76 ...... 85.04 ...... 87.90 ..... 84.60 Piezometric Elevation (~ MSL) 309.51 298.37 288.81 309.51 290.47 311.55 310.38 316.46 289.34 296.46 313.06 302.56 306.53 307.27 305.57 307.63 330.23 319:67 303.24 302.77 305.01 Screen Interval (ft bgs) Field Readings Start Depth End Depth DO,(mg/L) ORP(mV) 88.90 148.90 0.2 -100 105.00 134.00 m __ 125.00 150.00 0.3 -88 98.00 138.00 0.8 -76 129.25 149.25 0.3 69 100.00 130.00 0.3 8 74.00 134.00 0.3 -10l 74.00 134.00 5.3 110 125.00 150.00 0.2 -120 105.50 150.50 0.3 -2 100.00 ~49:00 9.9 29 100.00 130.00 1.3 52 73.00 95.00 7.1 94 20:00 50.00 m M 59.00 89.00 .... 70.00 90.00 70.00 90.00 4:9 4 42.00 82.00 -- -- 35.00 95.00 .... 50.00 70.00 M ~ 50.00 70.00 --- -- 20:00 50.00 5.1 111 20.00 50.00 2.4 -15 50.00 70.00 19.00 49.00 5.,6 44 H:/Pmjects/Shell/Bakersfield/Final/O77-O30/30 '03Report/Table 2 - 3rd Quarter. Ms Table 3a 3rd Quarter - Monitoring Well Analytical Results Shell Oil Products U. S. Bakersfield, California Well ID Sample Date Units TPHG BENZENE TOLUENE A3-01 08/20/03 A3-02 08/20/03 A3-03 08/20/03 A3-04 08/19/03 B-001L 08/15/03 B-001M 08/14/03 B-003 . 08/15/03 B,008 08/14/03 B-009 08/!3/03 B-011 08/19/03 B-013 08/19/03 B-0!4 08/14/03 B-017 08/14/03 B-023 08/13/03 B-024L 08/14/03 B-024U 08/14/03 B-030M 08/14/03 B-041L 08/!3/03 B-041M 08/13/03 B-041U 08/19/03 B-042 08/19/03 B-043 08/20/03 B-044L 08/19/03 B-044M 08/18/03 B-050L 08/19/03 B-050M 08/18/03 B-052L 08/13/03 B-052M 08/13/03 B-052U 08/19/03 B-075M 08/13/03 B-098L 08/19/03 B-098M 08/20/03 B-099L 08/13/03 B-099M 08/13/03 B~ 100L 08/14/03 B-100M 08/14/03 B-104M 08/14/03 B- 104U 08/19/03 B-105L 08/12/03 B- 105M 08/12/03 B- 106L 08/12/03 B- 106M 08/I 2/03 B-107L 08/11/03 B-107M 08/11/03 B- 108L 08/19/03 B- I 0SM 08/19/03 B- ! 10L 08/12/03 B- 11 OM 08/12/03 ug/L ND(100) ND(0.50) ug/L ND(100) ND(0.50) ugfL 2200 510(1)) ug/L 370 8 ug/L ND(100) ND(0.50) ug/L ND(100) ND(0,50) ug/L ND(100) ND(0,50) ug/L ND(100) ND(0.50) ug/L ND(100) ND(0.50) ug/L 790 120 ug/L 3400 26 ug/L ND(100) ND(0.50) ug/L ND(100) ND(0.50) ug/L 120 ND(0.50) ug/L ND(100) ND(0,50) ug/L ND(100) ND(0.50) ug/L 6]0 ND(0.50) ug/L 2000 ND(0.50) ug/L 300 ND(0.50) ug/L 1100 22 ug/L 28000 46 ug/L 5000 240 ug/L ND(100) ND(0.50) ug/L ND(100) ND(0.50) ug/L ND(100) ND(0.50) ug/L ND(100) ND(0.50) ug/L ND(100) ND(0.50) ug/L ND(100) ND(0.50) ug/L ND(100) ND(0,50) ug/L 2800 29 ug/L ND(100) ND(0.50) ug/L ND(100) ND(0,50) ug/L ND(100) ND(0,50) ug/L ND(100) ND(0.50) ug/L ND(100) ND(0.50) ug/L ND(100) ND(0.50) ug/L ND(100) ND(0.50) ug/L ND(100) ND(0.50) ug/L ND(100) ND(0.50) ug/L ND(100) ND(0.50) ug/L ND(100) ND(0.50) ug/L ND(100) ND(0.50) ug/L ND(100) ND(0,50) ug/L ND(100) ND(0.50) ug/L 4600 3.9 ug/L 4200 3.9 ag/L ND(100)ND(0.50) ug/L ND(100) ND(0.50) ETHYL BENZENE o-XYLENE p/m-XYLENE MTBE ND(!,0) ND(1.0) ND(I.0) ND(1.0) ND(i.0) ND(1.0) ND(1.0) ND(1.0) ND(I,0) ND(1.0) 11 ND(1.0) 2 6.2 49 1.6 ND('I.0) ND(1.0) ND(!.0) ND(I.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(I.0) ND(I.0) ND(I.0) ND(I.0) ND(1.0) ND(l,0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(I.0) ND(1.0) ND(1.0) ND(I.0) ND(1.0) ND(!,0) 43 4.4 13 29 7.1 55 78 110 140 ND(2.0) ND(1.0) ND(1.0) ND(1.0) ND(l,0) ND(I.0) ND(I.0) ND(1.0) ND(I.0) ND(1.0) ND(I.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1,0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(!.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) 1.6 ND(I.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) 1.2 ND(1.0) ND(1.0) ND(25) 2000 ND(25) 4400 ND(25) 460 260 240 690 ND(5.0) ND(1.0) ND(I.0) ND(1.0) 3.7 ND(1.0) ND(I.0) ND(1.0) ND(1.0) ND(I.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) IND(I.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(I.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(I.0) ND(1.0) 2.7 2.3 ND(l,0) ND(1.0) ND(I.0) ND(I.0) ND(1.0) ND(I.0) ND(1.0) 51 ND(I.0) ND(1.0) ND(1.0) ND(I.0) ND(1.0) ND(I.0) ND(1.0) ND(1.0) ND(1,0) ND(1.0) ND(I,0) ND(1.0) ND(1.0) ND(1.0) ND(I.0) ND(1.0) ND(1.0) ND(I.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(I.0) ND(1.0) ND(1.0) ND(I.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(I.0) ND(1.0) ND(I.0) ND(I.0) ND(I.0) ND(1.0) ND(I.0) ND(1,0) ND(1.0) ND(1.0) ND(I.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(I.0) ND(I.0) ND(1.0) ND(1.0) ND(I.0) ND(1.0) ND(1,0) ND(1.0) ND(I.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(l,0) ND(5.0) 410 ND(5.0) 350 ND(5.0) ND(I.0) 56 ND(1.0) 19 ND(1.0) ND(! .0) ND(1.0) ND(1.0) ND(I.0) ND(1.0) ND(I.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) H:lProjectslShelllBakersfieldlFinallO77-O3013Q '03Repofl/Table3a - 3rd Quarter.xls Well ID Table 3a 3rd Quarter - MonitoringWeli Analytical Results Shell Oil Products U. S. Bakersfield, California Sample Date Units TPHG BENZENE TOLUENE B-I 11L 08/!3/03 B-111M 08/13/03 B-114L 08/13/03 B-115_L 08/13/03 B-115M 08/13/03 B-116L 08/19/03 B.116M 08/19/03 B- 117L 08/21/03 B-117M 08/21/03 B- 118L 08/20/03 B- 118M 08/21/03 B-!20L 08/12/03 B- 120M 08/12/03 B-121M 08/12/03 B-!24L 08/15/03 B- 124M 08/18/03 B?125L 08/12/03 B? 125M 08/13/03 B- 126L 08/14/03 B-126M 08/!4/03 B-127L 08/18/03 13-127M 08/18/03 B- 128L 08/19/03 B-!28M 08/19/03 B- 129L 1 08/13/03 B-129L2 08/13/03 B- 129M 08/13/03 B-130L1 08/13/03 B-130L2 08/13/03 B- 130M 08/13/03 B-131L1 08/14/03 B-131L2 08/14/03 B-I 3 IM 08/14/03 B- 150M 08/18/03 B- 160M 08/19/03 B-161M 08/13/03 B- 162M 08/14/03 B-163M 08/14/03 B-164L 08/19/03 B- 166M 08/13/03 B- 167M 08/14/03 B~168L 08/18/03 B- 168M 08/18/03 B- 169L 08/19/03 B- 169M 08/19/03 B-169U 08/13/03 B- 170L 08/14/03 ug/L ND(100) 4.6 ug/L 750 160 ug/L ND(100) ND(0.50) ug/L ND(100) ND(0.50) ug/L ND(100) ND(0.50) ug/L 26000 4.4 ug/~._ 21000 4 ug/L 34000 1soo(o) ug/L 32000 20 ug/L 24000 64 ug/L 47000 180 ETHYL BENZENE ND(1.0) ND(1.0) 46 14 ND(1.0) ND(1.0) ND(1.0) ND(!.0) ND(1.0) ND(1.0) 93 670 6.3 690(D) 130 2200(D) 140 1700(D) 79 1500(D) 92000)) 31000)) ug/L ND(100) ND(0.50) ND(1.0) ND(1.0) ug/L ND(100) ND(0.50) ND(1.0) ND(1.0) ug/L ND(100) ND(0.50) ND(1.0) ND(1.0) ug/L 140 ND(0.50)' ND(1.0) ND(1.0) ug/L ND(100) ND(0.50) ND(1.0) ND(1.0) ug/L ND(100) ND(0.50) ND(1.0) ND(1.0) ug/L ND(100) ND(0.50) ND(I.0) ND(I.0) ug/L ND(100)ND(0.50) ND(1.0) ND(1.0) ug/L ND(100) ND(0.50) ND(1.0) ND(1.0) ug/L ND(100) ND(0.50) ND(I.0) ND(1.0) ug/L ND(100) ND(0.50) ND(1.0) ND(1.0) ug/L ND(100) ND(0.50) ND(1.0) ND(1.0) ug/L ND(100) ND(0.50) ND(1.0) ND(1.0) ug/L ND(100) ND(0.50) ND(I.0) ND(1.0) ug/L ND(100) ND(0.50) ND(1.0) ND(1.0) ug/L ND(100) ND(0.50) ND(I.0) ND(1.0) ug/L ND(100) 0.82 ND(1.0) ND(1.0) ug/L ND(100) ND(0.50) ND(I.0) ND(1.0) ug/L ND(100) ND(0.50) ND(1.0) ND(1.0) ug/L ND(100) ND(0.50) ND(1.0) ND(1.0) ug/L ND(100) ND(0.50) ND(1.0) ND(1.0) ug/L ND(100) ND(0.50) ND(1.0) ND(1.0) ug/L ND(100) ND(0.50) ND(I.0) ND(1.0) ug/L ND(100) ND(0.S0) ND(1.0) ND(1.0) ug/L ND(100) ND(0.50) ND(1.0) ND(1.0) ug/L ND(100) ND(0.50) ND(1.0) ND(1.0) ug/L ND(100) ND(0.50) ND(1.0) ND(1.0) ug/L 150 ND(0.50) ND(1.0) ND(1.0) ug/L ND(100) ND(0.50) ND(1.0) ND(1.0) ug/L ND(100) ND(0.50) ND(I.0) ND(1.0) ug/L ND(100) ND(0.50) ND(1.0) ND(1.0) ug/L ND(100) ND(0,50) ND(I.0) ND(I.0) ug/L ND(100) ND(0.50) ND(1.0) ND(1.0) ug/L ND(100) ND(0.50) ND(I.0) ND(1.0) ug/L ND(100) ND(0.50) ND(I.0) ND(1.0) ug/L ND(100) ND(0.50) ND(1.0) ND(I.0) ND(1.0) 16 ND(1.0) ND(I.0) ND(1.0) 26oo(0) 71 36OO(0) 3soo(o) 2400(D) 55oo(0) ND(1 .o) ND(I.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1,0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(! .0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(! .0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1,0) o-XYLENE p/m-XYLENE ND(I.0) 51 ND(I.0) ND(1.0) ND(1.0) 6400(D) 4300(D) 7700(D) 7900(0) 5900(1)) 110000)) .ND(l,0) ND(1.0) ND(1 .o) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1,0) ND(1.0) ND(I.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1,0) ~(1,o) ND(1.0) ND(1.0) ND(1.0) ND(1.0) 1.1 ND(1.0) ND(1.0) ND(1.0) ND(I.0) ND(1.0) ND(1.0) ND(l,0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ~u)(l .o) MTBE ND(1.0) ND(I.0) ND(1.0) ND(1.0) ND(1.0) ZlO(O) 300(0) ND(1,0) N_D(I.0) ND(1.0) ND(1.0) ND(1.0) 5.8 ND(1.0) 230(D) ND(I.0) ND(1.0) ND(I.0) ND(1.0) 2 ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(I.0) ND(1.0) ND(I.0) ND(1.0) ND(1.0) ND(1.0) ND(I.0) . NV(1.0) ND(1.0) ND(1.0) ND(1.0) ND(l,0) ND(1.0) ND(1.0) ND(1.0) ND(I.0) ND(I.0) ND(I.0) ND(1.0) .ND(1.0) ND(I.0) ND(I,0) H:lProjectslShelllBakersfieldlFinatlO77-O3013Q '03ReportYfable3a - 3rd Quarter. xls Table 3a 3rd Quarter - Monitoring Well Analytical Results Shell Oil Products U. S. Bakersfield, California ETHYL Well ID Sample Date Units TPHG BENZENE TOLUENE BENZENE B-!70M 08/20/03 ug/L 1~200 0.52 ND(1.0) 1.8 B.171L 08/14/03 ug/L ND(100) ND(0.50) ND(1.0) ND(1.0) B.171M 08/14/03 ug/L ND(100) ND(0.50) ND(I.0) ND(I.0) B. 171U 08/20/03 ug/L 550 ND(0.50) ND(1.0) ND(!.0) B.172M 08/15/03 ug/L ND(100) 2.6 ND(1.0) ND(!,0) B-172U 08/15/03 ug/L ND(100) ND(0,50) ND(1.0) ND(1.0) B-173U 08/14/03 ug/L ND(100) ND(0.50) ND(1.0) ND(1.0) B-175L 08/20/03 ug/L 1500 340(D) 12 31 B-175M 08/20/03 ug/L 18000 9300 860 1300 B-175U 08/20/03 ug/L 46000 980 7300 1800 B.176L 08/20/03 ug/L ND(100) 0.55 ND(1.0) ND(1.0) B.176U 08/18/03 ug/L ND(100) ND(5.0) ND(10) ND(10) B.177M 08/19/03 ug/L 23000 82 57 16000)) B.177U 08/20/03 ug/L 14000 8900)) 8.9 17000)) B.178M 08/20/03 ug/L ND(100) ND(0.50) ND(1.0) ND(!.0) B-178U 08/20/03 ug/L ND(100) ND(0.50) ND(1.0) ND(I.0) B-179M 08/19/03 ug/L ND(100) ND(0.50) ND(1.0) ND(1.0) B-179U 08/19/03 ug/L ND(100) ND(0.50) ND(1.0) ND(1.0) B-180L 08/18/03 ug/L ND(100) ND(0.50) ND(!.0) ND(1.0) B-180M 08/18/03 ug/L ND(100) ND(0.50) ND(1.0) ND(1.0) B.180U 08/13/03 ug/L ND(100) ND(0.50) ND(1.0) ND(I.0) B-181L 08/18/03 ug/L ND(100) ND(0.50) ND(1.0) ND(1.0) B-181M 08/18/03 ugfL ND(100) ND(0,50) ND(I.0) ND(!.0) B- 181U 08/21/03 ug/L 3600 ND(10) ND(20) ND(20) B-182M 08/18/03 ug/L ND(100) ND(0.50) ND(I.0) ND(1.0) B-182U 08/15/03 ug/L ND(100) ND(0.50) ND(1.0) ND(1.0) B-185L 08/15/03 ug/L ND(100) ND(0.50) ND(1.0) ND(l,0) B-185M 08/15/03 ug/L ND(100) ND(0.50) ND(1.0) ND(1.0) B-185U 08/15/03 ug/L ND(100) ND(0.50) ND(!.0) ND(1.0) B-!86L 08/15/03 ug/L ND(100) ND(0.50) ND(LO) ND(1.0) B-186M 08/15/03 ug/L ND(100) ND(0.50) ND(1.0) ND(1.0) B-186U 08/15/03 ug/L ND(100) ND(0.50) ND(I.0) ND(I.0) B-187L 08/18/03 ug/L ND(100) ND(0.50) ND(1.0) ND(I.0) B-187M 08/15/03 ug/L ND(100) ND(0.50) ND(I,0) ND(1.0) B-188L 08/15/03 ug/L ND(100) ND(0.50) ND(1.0) ND(1.0) B-188M 08/19/03 ug/L ND(100) ND(0.50) ND(1.0) ND(1.0) B-188U 08/20/03 ug/L ND(100) ND(0.50) ND(1.0) ND(I.0) B-195L 08/20/03 ug/L ND(!00) ND(0.50) ND(1.0) ND(1.0) B-195M 08/20/03 ug/L ND(100) ND(0.50) ND(!.0) ND(1.0) B.195U 08/20/03 ug/L ND(100) 0.52 ND(1.0) ND(1.0) B-196L 08/13/03 ug/L ND(100) ND(0.50) ND(1.0) ND(1.0) B-196M 08/13/03 ug/L ND(100) ND(0.50) ND(1,0) ND(I.0) B-196U 08/13/03 ug/L ND(100) ND(0.50) ND(1,0) ND(I.0) B-201 08/14/03 ug/L ND(!00) ND(0.50) ND(1,0) ND(1,0) B-202L 08/18/03 ug/L ND(100) ND(0.50) ND(I.0) ND(I.0) B-202U 08/14/03 ug/L ND(100) ND(0.50) ND(I.0) ND(1.0) D2 08/19/03 ug/L 140000 11000 49000(D) 2800 o-XYLENE p/m-XYLENE ND(1.O) 3.3 ND(1.0) ND(1.0) ND(I.0) ND(I.0) ND(1.0) ND(1.0) ND(1.0) ND(I.0) ND(1.0) ND(I.0) ND(1.0) ND(I.0) 60 120 1200 3500 3500 7600 ND(I.0) ND(1.0) ND(10) ND(10) 16000)) 43000)) 140 2600(9) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(I.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(I.0) ND(1.0) ND(1.0) ND(I.0) ND(20) ND(20) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ~XrD(l.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(I.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) 2.5 ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(I.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(I.0) ND(I.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) 6000 15000 MTBE 3100(O) ND(1.0) ND(I.0) 890(D) 2O 65 4.5 4.8 ND(50) ND(100) ND(1.0) ND(10) ND(1.0) 9.9 ND(1.0) ND(I.0) 69 18 ND(I.0) ND(I.0) 58 1.2 ND(1.0) 12000(D) ND(1.0) 21 5.6 4.1 ND(1.0) ND(1.0) ND(1.0) ND(I.0) ND(1.0) 3.5 35 1.8 ND(1.0) ND(1.0) ND(! .0) 7.1 ND(1.0) ND(I.0) ND(I.0) ND(1.0) ND(1.0) ND(I.0) 4900 H:lProjectslShelllBakersfieldIFinallO77-O3013Q '03Report/Table3a - 3rd Quarter. xls Table ~a 3rd Quarter - Monitoring Well Analytical Results Shell Oil Produets U, S. Bakersfield, California Well ID Sample Date Units D3 08/13/03 ug/L DP2 08/14/03 ug/L MN1Z 08/21/03 ug/L MN2AU 08/2 !/03 ug/L MS2.5A 08/20/03 ug/L PW-L23 08/12/03 ug/L PW-L26 08/12/03 ug/L PW-L28 08/12/03 ug/L PW-U4 08/11/03 ug/L RI 08/20/03 ug/IJ R2 08/!8/03 ug/L R4 08/19/03 ug/L R6B 08/20/03 ug/L RS-6A 08/20/03 ug/L RS-DP4 08/14/03 ug/L RS-DP5 08/13/03 ug/L RS-DP6 08/14/03 ug/L RS-DP7 08/14/03 ug/L RS-HC7 08/19/03 ug/L RS-HC8 08/12/03 ug/L RS-MNIZ 08/14/03 ug/L RS-MN2B 08/14/03 ug/L RS-MS2.5C 08/13/03 ug/L RS-MS3A 08/14/03 ug/L T10A 08/21/03 ug/L T9A 08/20/03 ug/L WIP-W2A 08/14/03 ug/L WIP-W3A 08/21/03 ug/L WIP-W4A 08/21/03 ug/L ETHYL TPHG BENZENE TOLUENE BENZENE o-XYLENE ND(100) ND(0,50) ND(I.0) ND(l,0) ND(1.0) ND(100) ND(0.50) ND(1,0) ND(1.0) ND(l,0) 880 22 ND(1.0) 19 ND(1.0) 30000 420 1200 1900 1200 12000 9.1 23 140 280 ND(100) ND(0.50) ND(!,0) ND(1.0) ND(1.0) ND(100) 4.9 1.2 22 ND(100) ND(0.50) ND(1.0) ND(1.0) ND(I.0) ND(100) ND(0.50) ND(1.0) ND(!.0) ND(1.0) 17000 48 480 470 260 ND(100) ND(0.50) ND(I.0) ND(1.0) ND(l,0) 3600 0.8 2.1 24 2.4 26000 340 1100 1800 1600 1200 24 7.5 65 7.5 110 ND(0.50) ND(1.0) ND(I.0) ND(1.0) ND(100) ND(0.50) ND(1.0) ND(1.0) ND(1.0) ND(100) ND(0.50) ND(1.0) ND(1.0) ND(1.0) ND(100) ND(0.50) ND(1.0) ND(!.0) ND(1.0) ND(100) 1.5 4.3 4.6 2.4 ND(100) ND(0.50) ND(1.0) ND(1.0) ND(1.0) 2400 640 ND(5.0) ND(5.0) ND(5,0) ND(100) ND(0.50) ND(1.0) ND(1.0) ND(1.0) ND(100) ND(0.50) ND(1.0) ND(1.0) ND(1.0) ND(100) ND(0.50) ND(1.0) ND(1.0) ND(1.0) ND(100) ND(0.50) ND(I.0) ND(1.0) ND(1.0) ND(100) ND(0.50) 2.8 ND(1.0) 3.1 ND(100) ND(0.50) ND(1.0) ND(1.0) ND(1.0) 620 ND(0.50) ND(1.0) ND(1.0) ND(1.0) ND(100) ND(0.50) ND(1.0) ND(1.0) ND(1.0) Notes: Bold type indicates a hit '<' = indicates not detected above reporting detection limit Qualifiers: (D) Compounds at secondary dilution factor. (J) Estimated value. p/m-XYLENE m ii:o) ND(1.0) 190 8200 1100 ND(1.0) 1.9 ND(1.0) ND(1.0) 1600 ND(I.0) 6.9 3300 240 ND(1.0) ND(1,0) ND(1.0) ND(1.0) 2,6 ND(1.0) 10 ND(1 .o) ND(1.0) ND(1.0) N~(1.0) 6.2 ND(! .0) ~,,~(1.o) ND(I.0) MTBE ND(1,0) ND(I,0) 2.8 ND(100) ND(10) ND(I.0) ~D(t.0) ND(1.0) ND(l,0) 2000 m)(!.o) ND(I.0) ND(20) ~ro(1.o) ND(1.O) ND(I.0) ND(1.0) ND(1.0) ND(1.0) ND(!.0) 58 ND(I.0) ND(1.0) ND(1.0) ND(1.0) 1.7 ND(1.0) 920(D) ND(l,0) H:lProjectslShelllBakersfie!dlFinallO77-O3013Q '03Report/Table3a - 3rd Ouarter.xls 'Table 3b 3rd Quarter - Water ~Supply Well Analytical Results Shell Oil Products U. S. Bakersfield, California Well iD Sample Date Units TPHG D-3 08/13/03 ug/1 ND(1.0) D-6 08/18/03 ug/l ND(1.0) I- 1 08/11/03 ug/l ND(I.0) 1-12 08/11/03 ug/l ND(I:0) I-2 .08/13/03 ug/l ND(1.0) I-3 08/11/03 ug/l ND(1.0) I-6 08/13/03 ug/l ND(1.0) ~-9 08/13/03 ug/l ND(1.0) ETHYL BENZENE TOLUENE BENZENE o-XYLENE p/m-XYLENE MTBE ND(0.50) ND(1.0) ?,'9(1.0) ND0.0) ND(1.0) ND(1.0) ND(0.50) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ,ND(1.0) ND(0.50) ND(I:0) ND(1.0) ND(1.0) ND0.0) ND(1.0) ND(0.50) ND(1.0) ND(I.0) ND(I.0) ND(1.0) ND(1.0) ND(0.50) ND(1.0) ND(I.0) ND(l:0) ND(1.0) ND(1.0) ND(0.50) ND(1.0) ND(I.0) ND(I.O) ND(I.0) ND(1.0) ND(0.50) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(0.50) ND(I.0) ND(1.0) ND(1.0) ND(1.0) ND(I.0) Notes: ND - Indicates not detected at the detection limit shown in parentheses ug/L = Micrograms per liter TPHG = Total Petroleum Hydrocarbons, Gasoline Range MTBE = Metyl Tertiary Butyl Ether H:lPmjectslShelilBakersfieldlFinallO77-O3013Q '03Report/Table3b - 3rd Quarter.xls Sample Wdl ID Type Sample Code Sample Date Unlt~ TPHG Table 4 3rd Quarter- Quality Assurance Results Shell Oil Products fO. $. Bakersfmld, California 1,2- . I,I- ETHYL CARBON ,L-IILORO DICHLORO DICHLOR VINYL BENZENE TOLUENE BENZENE o-XYLENE p/m=XYLENE TETRACHLORIDE BEN2~NE BENZENE :OETHENE DI~E TBA ETHANOL ETBE MTBE TAME TUE CIILORIDE F~ EB I=1205120301EB ~3 EB B-106L0g 120301EB El3 EB B-120L08120301EB EB EB RS-DP608140301EB EB EB RS-M53A08140301 EB El3 EB ,B-116LOg 190301EB EB EB ,D208190301EB EB EB A3-0208200301EB EB EB B-117M08210301EB EB EB B-IglU08210301EB EB EB WIP-W208210301EB LCD 'LCD 098-03-O06-4006-LCD LCD LCD 098-03-O06-4009-LCD LCD 'LCD '099-10-006-0184-LCD LCD ,LCD 099-10-006-8186-LCD LCD LCD 099-10-006-8190-LCD LCD LCD 099-10-O06-81gI-LCD LCD LCD 099-10-006-8192-LCD LCD LCD 098-03-006-4007-LCD LCD LCD 098-03-006-4010-LCD LCD LCD 098-03-O06-4016-LCD LCD LCD 099-10-006-8194-LCD LCD LCD 099-10-006-8197-LCD LCD LCD 099-10-006-0109-LCD LCD LCD 099.10-006-8200-LCD LCD LCD 098..03-006-4018-LCD LCD LCD 098-034106-4021 ~LCD LCD LCD 095-03 -096-4026-LCD LCD 'LCD 099-10-006-8226-LCD LCD LCD 099-10..006-8227-LCD LCD LCD 099-10-006-8236-LCD LCD LCD 098-03-006-4030-LCD LCD LCD 098-03-006-403 I-LCD LCD LCD 098-03-006-4032-LCD LCD LCD 098-03-006-4033-LCD LCD LCD 099-10-006-0228-LCD LCD LCD 099-10-006-8235-LCD LCD LCD 098-03-006-4034-LCD LCD LCD 098-03-006-4037-LCD LCD LCD 099-10-006-8239-LCD LCD LCD 098-03-006-4040-LCD LCD LCD 099.10-006-8244-LCD LCD LCD 099-10-006-0247-LCD LCD LCD ,098-03-006-4041 -LCD LCD iLCD 099-10-006-8254-LCD ,LCD LCD 099-10-006.8257-LCD ,LCS LCS 098-03-006-4006-LCS LCS LCS 098-03-006-4009-LCS LCS · LC, S 0~9- l 0..~06-81 g4-LCS LCS LCS 099. I 0-006-8106-LCS LCS LCS 099-10-006-8190-LCS · LCS LCS 099-10-006-$191-LCS LCS LCS 099.10-006-8192-LCS LCS [.CS 099.10-O06-8197-LCS o/11~003 ~ NI~0.100) ND(0.00050) NT)(0:0010) ND(0.0010) ND(0.0010) ND(0.0010) 8/12/2003 m~l N1XO.;IO0) ND(0.00050) ND(0.0010) NI)(0.0010) NIX0.0010) ND(0.0010) 8/12/20o3 mg, q ,ND(0.100) ND(0.000S0) ND(0.0010) ND(0.0010) ND(0.0010) ND(0.0010) 8/12/2003 mg/I NIX0. 100) ND(0.00050) ND(0.001 O) NI~0.001 O) NIX0.0010) ND(0.0010) 8/14/2003 n~ND(0.109) ND(0.00050) ND(0.0010) ND(0.0010) ND(0.0010) ND(0.0010) 8/14/2003 ms/1 NIX0.109) ND(0.00050) ND(0.0010) ND(0.0010) NIX0.0010) NIX0.0010) 8/19/2003 ms/1 lqD(0.100) ND(0.00050) ND(0.0010) NIX0.0010) ND(0:0010) ND(0.0010) 8/19/200~ m~NIX0.100) ND(0.00950) 'NIX0.0010) NIX0.0010) ND(0.0910) m~(0.0010) 8/20/2OO3 m~l ND(0.109) ND(0.00050) ND(0.0010) ND(0.0010) ND(0:00i0) ND(0.0010) 8/21/2003 m~l NIX0. I00) ND(0.00050) ND(0.0010) NIX0.0010) 0.0914 0.0041 8/21/2003 m~NIX0.100) ND(0.00050) NIX0.0010) NIX0.0010) ND(0.0010) ND(0.0010) 8/21/2003 mg/I ND(0.109) ND(0.00050) NIX0.0010) ND(0:0010) ND(0.0010) ND(0.0010) 8/15/2003 %REC 89 8/18/2003 %REC 105 8/18/2003 %REC -- 99 98 -- -- -- 8/18/2003 %PEC -- 99 95 -- -- -- 8/18/2003 %REC -- 103 97 -- -- -- 8/18/2003 %REC -- 99 99 -- 8/18/2003 %REC -- 109 102 -- -- -- 8/19/2003 %1~C 84 8/19/2003 %KEC 107 8/19/2003 %REC 94 8/19/2003 %REC -- 101 96 -- 8/19/2003 %PEC -- 92 96 -- $/19/2003 %REC -- 101 100 -- 8/19/2003 %REC -- 96 94 -- 8/20/2003 ~/dLE C 96 8/20/2003 Y, tLEC 85 8/22/2003 %REC 88 8/22/2003 %REC -- '104 105 -- 8/22/2003 %REC -- 91 93 8/22/2003 */dLEC -- 106 106 -- -- -- 8/23/2003 %KEC 86 8/23/2003 YdLEC 107 8/23/2003 %REC 108 80.3/2003 %REC 98 8/23/2003 %REC -- 90 91 8/23/2003 ~dLEC -- 101 103 -- -- -- 8/25/2003 %REC 107 8/25/2003 %REC 95 $/25/2003 YdI. EC -- 104 106 -- -- -- 8/26/2003 %REC 110 --' 8/26/2003 %REC -- .104 108 -- -- -- 8/26/2003 ~dt. EC -- .101 104 8/27/2003 %REC 90 8/27/2003 %REC -- 101 104 8/27/2003 %PEC · -- 103 106 -- -- -- 8/18/2003 %REC 91 8/18/2003 %KEC 105 8/18/2003 %REC ~ 109 99 8/18/2003 %REC -- 95 94 -- -- -- 8/18/2003 %REC -- 103 97 8/10/2003 %REC -- 99 101 8/18/2003 %ILEC -- 108 101 8/18/2003 YdLEC -- 92 96 ....... -- N~O.OOlO) -- ...... ~aXo.001o) -- .-- -- ...... NIX0.001O) -- ...... NI~o.o01o) -- ..... · -- -- -- lq~0.0010) ...... NIX0.0010) -- ...... ND(0:0010) -- ...... {,~o(0.001o) -- ........ ND(0:0010) ...... mXo. oolo) -- ...... 0.0013 .... -- -- I%tD(O.O01 O) '90 100 100 108 98 82 96 96 88 87 86 114 105 99 97 115 99 92 85 97 93 91 :100 ,113 123 '95 91 108 110105 103 ,111 106 101 89 112 87 100 102 .103 10090 105 96 90 88 85 114 123 99 91 113 115~101 102 ~112 109 103 109 1,16 105 102 98 120 I00 54 62 91 87 79 103 116 89 98 94 109 90 74 83 93 90 87 98 96 93 101 101 108 100 79 92 94 08 :86 99 119 98 96 96 111 98 88 97 94 89 :07 97 111 105 102 104 113 98 66 99 102 106 10097 94 101 105 :105 92 89 '101 82 96 93 10088 87 105 104 107 '105 10471 104 108 122 10597 97 101 99 105 104 85 91 73 93 :81 93 90 91 132 100 99 120 96 106 100 111 109 116 105 120 98 102 105 115 ~10397 88 105 106 103 106 106 99 103 ,105 119 10583 $3 103 102 100 {104 I11 102 101 '102 113 10199 86 ;101 102 99 102 '103 99 100 '102 116 10381 80 ~100 ,100 96 105 109 106 102 104 116 106,112 98 1105 ,107 102 104 108 91 ~100 · 101 103 99 :85 100 96 90 '88 $5 115 - 103 97 95 112 97 :88 86 96 92 89 97 109 124 96 91 109 111 105 '108 112 107 103 90 113 88 100 100 101 97 98 107 93 91 :09 85 I 1 I. 121 98 92 111 117 105 102 114 109 104 107 113 87 98 93 109 90 76 90 93 '90 87 97 95 Sample Well ID Type Sample Code Units TPHG Table 4 3rd Quarter - Quality Assurance Results 'Shell Oil Products U. S. Bakersfield, California 1,2- 1J- CARBON C~LORO D1CltLORO ID1CHIX)R VINYL BENZ~NE TOLUENE BENZENE o-XYL~NE ~n~XYLEI~ TETRACHLORIDE ]~ENZENE BENZENE OETHENE DIPE TBA I~'THANOL ETBE MTBE TAME TCE CHLORIDE LCS LCS 098-03-006-4007-LCS 8/19/'2003 %REC LCS LCS 098-03-006-4010-LCS $/19/2003 %REC LCS L~S '098-03-006-4016-LCS ' 8/19/2003 %REC LCS LCS 099-10-006-8194-LCS 8/19/2003 LCS LCS 099-10-006-8199-LCS 8/19/2003 %P~C LCS LCS 099-10-006-8200-LCS 8/19/2003 %REC ECS L£S 098-03-006-4018-LCS 8/20/2003 %REC LCS LC$ 09g-03-006-4021 -LC$8/20/2003 %REC 'LCS LCS 098-03-006-4026-LCS 8/22/2003 %REG LCS LCS 099-10-006-8226-LCS 8~22/2003 %REC LCS LCs 099-10-006-8227-LCS 8f22/2003 %REC ' LCS LGS 099-10-006~8235-LCS 8/2272003 %KEC LCS LCS 099-10-006-8236-LCS 8/22/2003 %REC LCS LCS 098~3..006-4030-LCS 8/23/2003 %KEC :86 LCS [,CS 098-03-006..4031 -LCS 8/23/2003 %KEC 112 LCS LCS 098-03-006-4032-LCS 8,23/2003 %PEC 109 LCS LCS 09~-03-006-4033-LCS 8/23/2003 %REC 98 [,CS LCS 099-10-006-8225-LCS 8/23/2003 %REC -- LCS LCS 095-03-006-4034-LCS $/25/2003 %REC 106 LCS LCS 095-03-00(~4037-LCS 8/25/'2003 %ILEC 93 LCS ,LCS 099-10-006-8239-LCS 8~25/2003 %REC -- LCS LCS 099-10-006-8243-LC5 8F2~/2003 %REC LCS LCS 098-03-006-4040-LCS 8,'26/2003 %REC 108 LCS LCS 099-10-006-8244-LCS 8/26/2003 %REC ,LCS I,CS 099-10,-006-~247-LCS8,'26/2003 %REC 'LCS LCS 098-03-006-4041 -LCS8~7/'2003 %REC 83 LCS LCS 099-10-006-8254-LCS 8/27~2003 %REC -- LCS LCS 099-10-006-8257-LCS 8/27/2003 %REC MB MB 098-03-006-4006-MB $/18/2003 m&/1 ND(0.100) MB MB 098-03-006-4009-MB 8/18/2003 mg/[ ND(0.100) MB MB 099-10-006~8184-MB 8/18/2003 mg/I MB MB 099-10-006-M g6.MB 8/18/2003 mg/I MB lv~ 099-10-006-8190-MB 8/18/2003 mg/l MB MB 099-10-006-$192-MB 8/18/2003 mgJl -- MB MB 095-03-006-4007-MB 8/19/'2003 mg/l ND(0.100) MB MB 095-03-006-4010-MB 8/I 9/2003 mg/I ND(0.100) MB MB 09g-03-006.-4016-MB 8/19/2003 rog/1 ND(0.100) MB ,MB 099-10-006-8191 -MB 8/19/2003 mg/I MB MB 099-10-006-.8194-[v~8/l 9,'2003 mgd -- MB MB 099-10-006-~ 197-MB 8/19/2003 mg/I MB MB 099-10-006-8199-MB 8/19/2003 mgdl MB MB 099-10-00~g200-MB $/19f2003 mg/I -- MB MB 098-03-006-4018-M~ 8/20/2003 raga ND(0.100) MB MB 098-03-006-4021-MB 8~20/'2003 m~dl ND(0.100) MB MB 098-03-006-4026-MB 8/22/2003 m~lNTD(0.100) MB MB 09g-03-006-4031 -MB 8/2212003 rog/1 ND(0.100) MB MB 099.10-006-~226.MB 8~2212003 raga MB MB 099-10-006-8227-M~ 8/22.12003 mg/I MB MB 099.10-006-$236-MB 8122/2003 mg/I -- MB MB 09S.-03..006-4030-MBS,'23.,2003 ta~dl I~(0.100) MB MB 098-03-006-4032-MB 8.,23~003 mg/l ND(0.100) MB MB 098-03-006-4033-MB 8/23/2003 mg/I ND(0.100) MB MB 099-10.-006-8225-MB $/23,r2003 mg/I ,MB MB 099-10,-006-8235-MB ~/'23/2003 rog/1 MB MB 09~-03-006-4034-MB 8/25~003 rog/1 ND(0.100) 89 104 95 -- 98 -- 102 -- 97 87 90 95 -- -- -- 102 99 98 119 101 gl 99 '94 92 83 98 .100 -- -- -- 93 101 102 112 .10077 89 94 87 85 99 94 -- -- -- 100 97 96 115 98 94 92 96 93 g8 98 103 -- -- -- 104 101 103 I15 97 70 102 102 99 99 97 89 92 -- -- -- 101 106 109 97 90 105 84 99 95 99 89 102 102 -- -- -- 133 99 100 '117 80 99 94 ;100 ,105 113105 107 106 -- -- -- 102 105 108 100 105.100 99 108 ~116 10599 89 95 -- -- -- 101 ,106 107 H0 84 95 78 94 87 93 88 101 104 -- -- -- 100 100 102 111 101 101 87 103 104 102 103 111 ,108 -- -- -- 126 101 105 105 ,100121 H6 118 103 114 105 102 105 -- -- -- 94 101 103 117 10480 83 102 102 98 102 101 104 -- -- -- 100 101 103 114 10196 84 101 102 99 103 102 105 -- -- -- 96 102 103 116 10477 79 ~01 101 97 103 102 105 -- -- -- 103 101 103 117 105100 98 104 106 100 104 ND(O:OO0~0) ND(O.O010) ~'D(O.0010) N-D(O.0010) I,~O(0.00t0) ..... :--ND(0.O010) ~,~(o:ooo~o) ~(o.ooto)~o(o.oolo) 1,m(o.oolo) i~(o.oo~o) ...... ~D(0.0010) ND(0.00050) ,ND(0.0010) ND(0.0010) ND(0.0010) ND(0.00~0) ...... ND(0:0010) ND(0.00050) ND(0.0010) ND(0.0010) ND(0.0010) NIK0.0010) ...... ND(0:0010) ND(0.00O$0) ND(0.0010) ND(0.0010) ND(0.0010) b~0.0010) ...... ND(0.0010) NO(0.000~0) NO(0.0010) i~D(0.0ot0) ~m(0.0010) ~D(0.0010) ...... NO(0.00~0) h~D(0.000~0) NO(0.0010) ND(0.00t0) ~D(0.00~0) ~,~D(0.0010) ...... I'ID(0.0010) ~.tO(o.o00~O) ~'D(O.O010) UD(O.O010) ~0.0010) ~,n~O. O010) ...... ~D(0.00t0) ND(0.00050) ND(0.0010) ND(0.0010) ND(0.0010) ND(0.0010) ...... ND(0.0010) ~(o.ooo~o) ND(0.0010) ND(0.0010) Ia0(0:0010) ~m(0.001o) ...... ~D(0.0010) ND(0:000~0) ND(0.0010) ND(0.0010) ND(0.0010) ND(0.0010) ...... ND(0.0010) ND(0.00050) ND(0.0010) ND(0.00I 0) ND(0.0010) ND(0.0010) ...... ND(0.0010) ND(0.00050) ND(0.0010) ND(0.0010) ir~(0.0010) _ND(0.0010) ...... ND(0.0010) ND(0.00O~0) ND(0:0010) ND(0.0010) ~I~D(0.0010) I',~0.00~0) ...... ND(0.0010) 96 93 94 102 104 110 Sample Well ID Typ~ Sample Code Sample Date Units TPHG Table 4 3rd Quarter - Quality Assurance Results :Shell Oil Products U. S. Bakersfield, California 1,~ I,I- ETHYL CARBON CH].,ORO D1CHLORO DICHLOR VINYL B~NE TOLUENE BENZENE o-XYLIENE p/m-XYLENE IEIIe~CHLORIDE BENZENE BENZEI~E OWrlIENE ,DIPE TBA ,ETHANOL ETBE MTBE TAME TCE .CHLORIDE MS MS 03-0g-1243-3-MS stzsf2003 m~aND(0.100) 8/25/2003 mg/l -- ~0.~50) ~0.~10) ~0.~10) ~0.0010) ~0.~10) -- 8~5~3 m~ -- ~0.0~50) ~0.~10) ~0.0010) ~0.0010) ~0.0010) -- S~6~003 m~ ~0.~) ...... 8~6~3 ~ -- ~o.~o) ~o.oolo) ~o.oolo) ,~o.~1o) ~o.oolo) -- 8~6~003 m~ -- ~0.~S0) ~0.0010) ~0.~10) ,~0.0010) ~0.~i0) 8~7~3 ~ ~0.100) -- 8~7~003 m~ -- ~.0~50) ~0.0010) ~0.0010) ~0.0010) ~(0.0010) -- S~7~003 m~ -- ~0.0~50) ~0.~10) ~0.0010) ~0.0010) ~0.0010) 8/18~003 %~ '1~ 8/18~003 %~C 89 8/19~003 %~C ~ 93 97 ~ ~ ~ 86 g/19~003 %~C 91 8/19~3 %~C -- 104 I01 8/19~003 %~C 91 8/19~003 %~ HI 8~1~003 °/~C 77 8~003 ~C 88 8~003 %~ ~ 106 107 101 8~003 %~ -- 92 94 ~ ~ ~ 96 8~3~003 Y~C 84 8~003 Y~C ' 103 8~3~003 Y~ 9~ 8~003 Y~ ~ 86 124(3) ~ ~ ~ 96 8~5~003 ~C ~ 102 105 ~ ~ ~ 96 8~5~3 %~C 90 8~003 %~C ~ 100 102 ~ ~ -- 96 8~003 Y~C 98 ~7~003 %~C 85 8~7~3 %~ -- 102 105 .... 91 g~ g~O03 ~C I~ 99 94 110 112103 100 99 103 99 90 94 93 106 94 96 99 94 110 91 75 102 IOl 107 IOl78 99 91 ,116 123,103 98 96 112 102,100 97 95 114 98 76 100 98 106 99 75 105 106 110 10461 ,107 109 92 86 96 103 100 112 89 I10 104 105 112 I05155 96 91 112 90 94 102 102 113 lO197 102 ~105 124 10398 104 106 120 10965' I00 101 112 100129 101 100 118 10575 103 103 H8 10790 98 94 108 110108 99 IOl 103 10090 97 95 108 96 98 99 94 109 91 80 100 92 112 120 110 -- -- ND(O:O010) -- -- ND(O:O010) -- -- -- ND(0:0010) -- -- -- ND(0.0010) -- -- ND(0.0010) . -- -- -- ND(0.0010) 106 109 105 102 103 I10 104 96 91 88 85 110 91 93 89 87 95 102 90 92 89 85 98 97 ~3 95 87 87 I00 117 101 99 101 90 I00 109 81 92 88 81 98 110 92 94 85 85 87 115 95 108 115 '10598 93 78 95 93 97 88 86 78 99 ,104(E)93 83 94 ,105 108 80 105 101 92 $2 101 98 106 100 102 93 103 103 100 104 104 112 95 104 99 105 116 :84 106 107 I01 104 113 97 lO0 103 98 100 103 84 99 ;100 96 104 1'10 99 · 106 ;107 ,102106 I'10 112 108 105 /02 I01 109 105 97 92 ,89 86 114 92 95 95 ,88 96 107 93 94 91 86 98 97 95 96 g8 87 99 119 115 114 109 104 105 122 Table 4 3rd Quarter - Qunllty Assurance Results Shell Oil Products U. S. Baker~fidd, C~lifornia Sample Wall [D Type Sample Code MSD MSD B-167M0~ 140301-MSD MSD MSD B-196U0~ 130301-MSD MSD MSD B-202U0gI40301-MSD MSD MSD PW-L230~ 120301 -MSD MSD MSD RS-HG$0g 120301-MSD MSD MSD B-10~M0~14030 I-MSD MSD MSD 03-0~-I 177-2-MSD MSD MSD B-104U08190301-MSD MSD MSD B-175M08200301 -MSD MSD ,MSD 03-08-1277-1 -MSD ,MSD MSD B-044M0gl $03-MSD MSD MSD B-09gM08200301 -MSD MSD MSD B-170M0$200301-MSD MSD MSD B-175L08200301-MSD MSD MSD B-Ig0L08180301-MSD MSD MSD RS-HC70g 190301-MSD MSD MSD 03-08-1218-5-MSD MSD MSD 03-0g-1315-1-MSD MSD MSD B-187L0glg0301-MSD MSD MSD 03-0g-1295-4-MSD MSD MSD B-050U0gl g0301-MSD MSD MSD B-160U0819030 I-MSD MSD MSD B-202L0gl $0301-MSD MSD MSD 03-08-1243-3-MSD MSD MSD 03..05-1415-3-MSD MSD MSD ,03-0g-1500-1-MSD R6B ,FB R6B09200301FB TB 'lB TB08110301 TB TB TB20g110301 TB TB TB30g110301 TB TB TB408110301 TB TB TB08180301 TB TB TB508180301 TB TB TB60~ lg0301 TB TB TBT0g 1~030] Sample Date Units 8/19/2003 %KEC g/19/2003 8/19/2003 %REC g/19/2003 8/20/2003 %REC 8/21/2003 %R. EC 8~22/2003 %REC 1/22/2003 %REC $.,23/2003 %REG 8/'23/2003 %REC $/23/2003 %REC ~;23/2003 %REC 8/23/2003 %REC ~/23/2003 %REC 8/2312OO3 %REC g/25/2003 %REC 8/25/2003 %REC 8,25/2003 %KEC 8/26/2003 ~/26/2003 :$/26.'2003 %REC ~/26/2003 ~/~EC 8/27/'2003 8/27/2003 %PEC 8/27'2OO3 %REC 8/20/2003 mg/I 8/11/2003 g/l 1/2003 mgdl g/l 1/2003 mg/l S/l 1/2003 medl 8/18/2003 m8/l g/18~2003 mg/l $/1g/2003 mg/l 8/18/2003 mg/I TPHG Notes: '--' = indlcatm not analyzed Bold tl, pe iodicates a hit ND - lndicatm not ~ a~ th~ de~'6on limit shown/n pamn~hes~s ug/L = Micn~mm per lira' TPHG = Total p~olmm'H~ns, Cramline Range DIPE = Dii~ol~opyl Ether TBA - Tm-Butyl Alcohol ETBE ~ Ethyl Tm-Butyl Fah~ MTBE ~ M~'yl T~n~iary Butyl Elher TAME -Tm. Amyl M~I Ether TCE - Tfichlon~tlgae Qualifiers: 04) MS/MSD analyte & RPD out of control-matrix inteffc~ce, (.l) Estimated value. i,2- 1,1- ETHYL CARBON CT~ORO DICHLORO D1CH1-.OR VINYL BF-aNZENE TOLUENE BENZENE o-XYI.~NE plm-XYLENE 'iI~-iKACHLORIDE BENZENE BENZEN~ OETH~"NE DIPE TBA ETHANOL ETBE ,MTBE TAME TCE CHLORIDE 105 -- 101 94 -- -- -- 103 99 96 112 10297 -- 98 94 -- -- -- 100 98 98 115 99 81 -- 102 99 -- -- -- 91 IO0 IO0 106 IO074 74 -- 106 ]05 -- -- -- 104 104 105 102 103 72 -- 88 95 -- -- -- 99 105 102 91 85 I01 -- g7 104 -- -- -- 98 100 IO0 106 88 -- 101(E) 107 -- -- -- 108 103 107 115 103,150 -- 102 100 -- -- -- 147 97 9~ 120 '92103 108 -- 102 105 -- -- -- 99 102 1(}4 112 102123 99 -- 111 10g -- -- -- 119 ,101 105 124 105 120 -- 104 106 -- -- -- 93 ~103 105 117 ,10677 -- 101 103 -- -- -- 102 102 103 114 ,103 92 98 -- '102 105 -- -- -- 99 101 102 118 105 87 -- 104 106 -- -- -- 105 103 103 118 10797 ND(0.100) ND(0.O0050) N~(0.O010) ~(0.0010)~,~(0.o010) ND(0.0010) .... ND(0.100) ND(0.00050) N~(0.0010) ~Vn(0.0010) ND(0.0010) ~m(0.o010) 't~(0.100) NI~0.O0050) N~(0.O010) 1,~(0.0010) ~n(0.0010) ~1~0:O010) ND(0.lo0) NIX0.00050) ND(0:0010) ND(0.O010) NIX0.O010) I'~0:0010) 1~0.,100) ~(0.00050)ND(0.0010) ND(0.0010) I~0.0010)I~0.0010) N~0.,IO0) ND(0.00050) ND(0:O010) ND(0.0010) ND(0.0010) ND(0:0010) ND(0.100) NI~0:00050) N~0.O0~0)Ng(0.00~0) ND(0.O010) ND(0.O010) ~(0.100)~'a~0:o0050) ~(0.0010)~,aX0.00~0) 1~(0:O010) ~'n~(0.0010) ..... ~O(0.100) ~n(0.00050) ~n(0.o010) ~m(0.0010) ~tn(0.0010) l'~0.0010) .... 98 100 95 91 101 116 84 94 89 84 98 116 90 95 86 85 89 ' 115 100 107 118 104 99 93 82 94 90 98 83 85 83 98 136(E3) 97 84 87 t04 107 76 104 96 91 91 107 105 111 100 1'17 98 103 105 101 105 104 ~29 107 112 109 106 118 81 102 103 99 105 112 39 103 106 IO0 102 104 84 102 103 98 102 113 101 106 107 103 '104 111 -- -- ND(0.001O) -- -- - N~(o.oolo) -- -- -- Nn(o,oolo) -- -- -- ND(0.0010) -- -- -- ND(0.O010) -- -- -- ND(0.0010) -- -- -- ND(0.0010) -- -- -- ND(0.O010) -- -- -- ND(0:O010) -- FIGURES H:\Projects\SHELL\Bakersfield\Final\077-030\3Q '03 Report\3Q'03rpt.doc 2000 ft. from U.S.G.S. 7.5 MIN. QUADRANGLE GOSFORD, CA 19¢9, PHOTOREVISED 1969 AND OILDALE, CA 1954, PHOTOREVISED 1968 FIGURE 1 -- SITE VICINITY MAP, SHELL BAKERSFIELD, ~"' REFINERY AND SALES TERMINAL, TriHydro Corporation BAKERSFIELD, CALIFORNIA 920 Sheridan Street Laramie, Wyoming 82070 Drawn By: BWl CheckedBy: NB [Scale: ASSHOWN I Date: 03/06/03 I.e,: o,,usGss,~s SCALE iL, REFORMATE LEAK LOCATION (MARCH 1987) AREA 92 AREA 9'~ ROSEDALE HIGHWAY I AVE lE EXTENSION) AREA 94- °O · o .~ ? · - 0~] OD AVENUE --I 3RD AVENUE ~00 0 O0 Oo o00 0 0 0 O' AREA 91 C STREET oo0 0 0 0 0 0'0 © r! 0 REFINERY AVENUE ooo~ TriHydro Corporation 920 Sheridan Street Laramie, Wyoming 82070 Drawn By: DS I Checked By: EXPLANA170N .... PROPERTY BOUNDARY 600 ft. I I SCALE FIGURE 2 SITE PLAN, SHELL BAKERSFIELD REFINERY, BAKERSFIELD, CALIFORNIA ~R I scale: 1"=600' I Date: 01/30/03 I Ref: 077SITEPLAN B-1 ROSEDALE HIGHWAY 67U B-169U 288.58 EW-04A eB-150U Dry · B-131U eB-115M · 291 B-099M 290.86 · B-114M 292.88 B-196U 291,89 B-O3Ok~- Mi MS2.5, a-45~ [3-11OM 8323.62 EXPLANA T/ON B-121M MONITORING WELL AND NAME · 308.52 (showing potentiometric-surface elevation in feet ~bove mean sea level) AEW-08 EXTRACTION WELL AND NAME -.----$12--~ LINE OF EQUAL ELEVATION OF POTENTIOMETRIC SURFACE (in feet above mean sea level; dashed where inferred; hachures delineate depressions in the potentiometric surface) ~ DIRECTION OF GROUNDWATER FLOW bgs BELOW GROUND SURFACE .... PROPERTY BOUNDARY Note: Groundwater elevations from multiple-completed wells are shown on the map 600 ft. SCALE ,~ FIGURE 3 I POTENTIOMETRIC MAP FOR GROUNDWATER ~,, <t10' bgs, SHELL BAKERSFIELD REFINERY, TriHydro BAKERSFIELD, CALIFORNIA Corporation i (August 2003) 920 Sheridan Street Laramie, Wyoming 82070 Drawn By: BW I Checked By:i JR ]Scale: 1"=600' I Date: 10,01,03 [Ref: 077PS200308U J[ ROS£DALE HIGHWAY iL 2~3,19 .... -X B~-'f'67M g ~- 168M 128s.9 B-126U 289.69 CHAR i oB-150M ,¢ B-1 · 286.1 B- 19 6M® 288.99 291.03 ).62 "=~289.69 289.34 292 295.65 B-103L B-125M 289.3t ~-1 IOL AVENUE 313.06 3t7.t5 0 0 0 0 ° ~! !? -~' 0 0 ' q--'~, ii! TriHydro Corporation 920 Sheridan Street Laramie, ~oming 82070 Drawn By: BW J Checked I~y: EXPCANI T/ON · B- 1 28M 301,97 iEW-09 ...---,.fl2-- ~ bgs MONITORING WELL AND NAME (showing potentiometric-surfoce elevation in feet above mean sea level) EXTRACTION WELL AND NAME LINE OF EQUAL ELEVATION OF POTENTIOMETRIC SURFACE (in feet above mean sea level; dashed where inferred; hachures delineate depressions in the potentiometric surface) DIRECTION OF GROUNDWATER FLOW BELOW GROUND SURFACE PROPERTY BOUNDARY Note: Groundwater elevations from multiple-completed wells are shown on the map 600 ft. I I SCALE FIGURE 4 POTENTIOMETRIC MAP FOR GROUNDWATER 110' - 140' bgs, SHELL BAKERSFIELD REFINERY, BAKERSFIELD, CALIFORNIA (August 2003) IR J sca,e: ~"=600' J Date: 10/02/03 J Ref: 077PS200308M ~ ~ i~ ~ ,B-127L ~ '---I ~ - / ~ 0 , ', _-B-128L297,9~ (showingMONITORING WELL AND NAME potentiometric-surface se~ level) ~~:::~ ;~: ~ ~ : potentiometric surface) ~ ANOMALOUS WITH SURROUNDING I u ~ ~1~ ~ ~ , I - ~r/' ~~ Comoration I BAKERSFIELD, CALIFORNIA I I ] I ~ .... ~1 .... 7' i:~ ..... ~ ...... ~ D;awn By: BWI Checked B tR I S~le 1 600 t I Y:~ I : "= ' I Oate: ~0/01/03 I Ref: 077PS200308L · EW-04 B-196U <t B-169U B-171U 4100 B-170 · B-11 5M · ,B-O'52U <1 ; <1 r, B 99M MN1 IF ' f ,'Bt114. M B-lOOM B- 103M ~ ~--": L ROSEDALE HIGHWAY I- 180U <1 DP2 MS2.5A · <100 <1 D3 !· ¸-11 B-O44M, ¢t B-187U~ · B~- 2.0_1j 7,700 · TgA 8;; 0 0 B-OSOM O B-'150M <1 0 O C~ I <1 ,. AREA 94 L2.7~ B-OO1U <1 39 O~ <1 0 - "!b~ '.o 0 i:i 0 Ioooooo eB-111M I PW%L28 ...... :. J · <1 12th <1 0 AREA 91 ,0 ·B~1121M C STREET A STR£ET LeB ~-t121M ·EW-08 MTBE bgs g/b EXPLANA T/ON MONITORING WELL AND NAME (showing MTBE concentrat;on in microgroms per liter) EXTRACTION WELL AND NAME LINE OF EQUAL METHYL TERT- BUTYL ETHER (MTBE) CONCENTRATION (in pq/L; dashed where inferred) METHYL TERT-BUTYL ETHER BELOW GROUND SURFACE MICROGRAMS PER LITER PROPERTY BOUNDARY NOTE: ALL CONCENTRATIONS SHOWN IN lag/L. B-11 ~, !70 43 oeo 00C 000 ,. :,I © ~REA go {I REFINERY AVENUE TriHydro Corporation 920 Sheridan Street Laramie, Wyoming 82070 Drawn By: BW I Checked I 0 600 ft. I ~ I SCALE FIGURE 6 MTBE PLUME CONTOURS FOR GROUNDWATER <J 10' bgs, SHELL BAKERSFIELD REFINERY, BAKERSFIELD, CALIFORNIA (May 2003) .t. B-f67M <1 B-131M B"168M J[ '" 66M EW-03' .~4-~1 e~1 ,-30M B- 169 M <1 B_129M® 3-125M <1 ,, <1 B-196M ROSEOALE HIGHWAY -180M~ <1 26M B-171M _~ B-186U · B-044L <1 B-187M B~195M~ --B~-i ~5'u --- -~:1 ~ --e B-188M <1 · <1 B-O50L® <t 10 EXTENSION) B~-O0 ~:~ I:M AREA 94. B-178M <1 h "=--::~I B-O75M ~ "'" " ~,i~ '1 ' ~::':---: t J '~ ::'~:" I .o AvE.u¢ B-41L 4~ A~U~ 0 AREA 91 0 o 0 0 'l STREE_.r~F-I ! A :F _J ~EA go'~, REFINERY AVENUE TB~-1108L ~EW-09 t MTBE bgs .ug/b EXP LA NA ~l O fl MONITORING WELL AND NAME (showing MTBE concentration in microgroms per liter) EXTRACTION WELL AND NAME LINE OF EQUAL METHYL TERT- BUTYL ETHER (MTBE) CONCENTRATION (in pcj/L; doshed where inferred) METHYL TERT-BUTYL ETHER BELOW GROUND SURFACE MICROGRAMS PER LITER PROPERTY BOUNDARY NOTE: ~,LL CONCENTRATIONS SHOWN IN pg/L. 600 ft. SCALE FIGURE 7 i MTBE PLUME CONTOURS I FOR GROUNDWATER 110' 140' bgs, ~ - ~ SHELL BAKERSFIELD REFINERY, TriHydro '~ Corporation BAKERSFIELD, CALIFORNIA 920 Sheridan Street (August 2003) Laramie, Wyoming 82070 Drawn By: BW I Checked By: !R I Scale: 1"=600' I Date: 10/06/03 I Ref: 077MTBE200308M 168L EW- Ii B- 130L2.B~'1130L1 ', .B;~ 29L2 B-151L2 B-129L1 ¢1 : <1 B- 125L'~ :B-131L1 : B-196L~ B-O~2L e B-011 I! RS-DP4 7.t · <1 I: B-O14· <1 T ' 13-017 i <1 ]1~ B-O24Le<1 'i" ...."17-- ROSEDALE HIGHWAY B-169L 1 66L 1 iL, I- 180L · ---'~ ,,-B- 18 <1 ~..~/ [(~t~,.2 1L B-126L ~. L~ B-171L ii B-186L B-186M <1 B-001 B- 1241 2~o B- 1 88 L 4.5 <1 · B-176L - ---e-B_ 003 <1 173U AREA 94. B-1 AREA 91 · <1" I <1 L, / NM AREA 92 --I ~RO AVENUF -J GO F% ~ %"-? AREA 93 ....-i '"" 1' "" 10 :i ~' 175U~ o = ,, _, ' o<~100 0 0 C 0 O0 75M ' AREA go°:' <50 q'q' '/- 175L ' ' - d'8 :-'"~ ' '' ~ '~1 I · B~1128L AEW-07 MTBE bgs ~g/L £XPL~N4 T/ON MONITORING WELL AND NAME (showing MTBE concentrotion in micrograms per liter) EXTRACTION WELL AND NAME LINE OF EQUAL METHYL TERT- BUTYL ETHER (MTBE) CONCENTRATION (in doshed where inferred) METHYL TERT-BUTYL ETHER BELOW GROUND SURFACE MICROGRAMS PER LITER PROPERTY BOUNDARY NOTE: ALL CONCENTRATIONS SHOWN IN ~ug/b 0 600 ft. I I I SCALE ~( FIGURE 8 MTBE PLUME CONTOURS ~ FOR GROUNDWATER >140' bgs, TriHydro i SHELL BAKERSFIELD REFINERY, Corporation BAKERSFIELD, CALIFORNIA 920 Sheridan Street (August 2003) Laramie, VVyoming 82070 Drawn By: BW I Checked By:l JR I Scale: 1"=600' I Date: 10/06/03 I Ref: 077MTBE200308L il: 0<1 Lb ROSEOALE HIGHWAY CHARITY AVENUE '[FRuITVALE EXTENSION) AREA g~- " I AREA 92 2NO AVENUE AREA g3 12th 0 AREA 91 o A STRE --~ i · i 0 0 TriHydro Corporation 920 Sheridan Street Laramie, W~oming 82070 Drawn By: BW I Checked EXPLANATION 1-12 o<1 WATER SUPPLY WELL AND NAME (showing MTBE concentration in microgrcms per liter) MTBE METHYL TERT-BUTYL ETHER IJg/L MICROGRAMS PER LITER .... PROPERTY BOUNDARY NOTE: ALL CONCENTRATIONS SHOWN IN ~ug/L. 0 600 ft. I I I SCALE FIGURE 9 MTBE RESULTS FOR NEARBY WATER SUPPLY WELLS, SHELL BAKERSFIELD REFINERY, BAKERSFIELD, CALIFORNIA (August 2003) IDate: 10/07/03 I Ref: 077MTBEH200308 1" = 600' <0.5 L · EW-04 B-169U <0.5 B-196U NM eB-115M B-O'52U ®40.5 <0.5 .I. <0.5 B-O99M/ , · B-114M ROSEDALEHIGHWAY ~ I B~,- 164M l .... NM B=2OJ] <0.5 B-171U <0.5 -180U® j\ <0.5 ~ ~ · ~ CB-18 fO c AVE E NSION) EW- 1 <0.5 11 170U B-170M 0.52 B-O44M, <0.8 B-187Ux 150M <0.5 B-O01U AREA 94- NM B- 178U <t <0.5 NM 0.52 ¢0.5 O AREA 91 o B-121M · <0.5 0 f C STREET o00I A STREET AVENUE o0.80 ,,~ L-- J 5RD AVENUE - ] 0 o .... · ~ 0 AREA 92 m B-1 1OM · <0.5 4TH AVENU~ ~ <0.5 B-lOOM B-IO3M NM · MN2AU '<0:5' ~ L., ;~ 0 0 ' oooo r I B- 104M -,. 160 ~ epw:E28 ..... :.- II <o.5 D5 I, ~ <o.~ I[ i:; o Ll' o El.' ~,0o TriHydro Corporation 920 Sheridan Street Laramie, V~oming 82070 Drawn By: BW I Checked By: B-121M <0.5 EW-08 bgs ~g/b EXPLANA T/ON MONITORING WELL AND NAME (showing benzene concentretion in microgrems per liter) EXTRACTION WELL AND NAME LINE OF EQUAL BENZENE CONCENTRATION (in pc.t/L; deshed where inferred) BELOW GROUND SURFACE MICROGRAMS PER LITER PROPERTY BOUNDARY NOTE: ALL CONCENTRATIONS SHOWN IN /ag/L. 0 600 ft. I i I SCALE FIGURE 10 BENZENE PLUME CONTOURS FOR GROUNDWATER <110' bgs, SHELL BAKERSFIELD REFINERY, BAKERSFIELD, CALIFORNIA (August 2003) IR I s ,e: 1,,=eoo, I Date: 10/03/03 I Ref: 077BEN200308U '~/~ l ~,~jl LI,j ~ ~ ~ ROSED~E HIGHWAY " ~ '~ ~ ~ ~ ~ I E~ , ,<~~~<O.,28~ PF' .-.~ (showing benzene concentr, tion M~--;~,~-i~,/~//~,r- ~ A~,,~ ' in micrograms per liter) / /// ', t "'.~l-" I~. B-16eM/~ / I ~%~%~~1~'~~1 AEW-O9 EXTRACTION WELL AND NAME / /// '. ~'~ ~~/// 1I __', ~ '" ~ , ,. '~.t.-- , ,' --, ::~ ~- , ~1---- LINE OF EQUAL BENZENE ~,:~__=," =,~ ~~o~S_~O.ST " ~ B-126M l;~e <os. ..! ,:1~ '--':-B-202E. -<os. ~_ ~ ~(~~_ ,~ O ~'~ ..,, ~~~ ~ I-~. _ ] dashed where inferred} k k% ~ ~;2'67M~~ ~E~%O9;~¢~~~/[~~¢~11,' ,~/, MICROGRAMS PER LITER %.. ~ B-196Me ~ B-195M , ', ~9M~ '? ~/I e~lOL ,:, ~, ~ <o.s ,~7%~ ~-~ <o.s · ',,._, .~=-I k 1 !<o.s --II~W" v~ ': .I; '" NOTE: ~ ...................... .=.>~ ..... ~;..::.c~ ...... .-,-~.,~ ....... : . ; <-,?,-;-;-:-:-:-.-;~::.=?:,:?:.=.=s ..................... ~=;:~:s::=;=~..=~=.:: :~-,-,-~-~-:-.:~-,-~h~.~~ ALL CONCENTRATIONS SHOWN IN pg/L. ~ ~ ..... ~I ~~--~ ~'~' , ~ ~Z'¢':r'-'-~~;, , ,- .--,--,--,-,-,,. .... ,__:_, ~-%~-rI ........ ,_~,_._,_ _,_,_,__,_,_,_,~,_, I' " - -~t .... ~ " ,~. <0.~ t i ¢oo~ " -,.f:~ I ~ <0.s ~ 6L . . _~s-~ , ~,~ i ¢ ' ,,/! :1 ' ...... ¢/ ~-~ RE"NERY A~NUE · <o~ i B-O24U " · . ~ ~. ~ ........ / ~ ~ SCALE ~I! "~ I<O. ';=J. II ~ % ¢.' FA ~ ' C? O I ~ ~" ~ ' I = ' FOR GROUNDWATER110'- t40'bgs, I r ~ ~ ~ i ~ t !: - ..... :? =; ~;(~e' ~ 2,1 TrIHydro ! SHELL BAKERSFIELD REFINERY, I ~~_~.t:7 L ~ ~1, ' - --~? ~~~ 9~r~::~is~&t BAKE"SFIELD,(August 2003)CALIFORNIA ' ~[ ........ JL ! B-1,30L2 B-130L1 B- 1 311 L2 !~B-151L1 EW · B- 129L1 <0,5 B- 129 L2 <0,5 B-196L· <0.5 B-O~2L · <0.5 T B-01 .l 120 RS-DP4 ~ <0.5 B-014· <0.5 · B-017 <0.5 B-024L· <0.5 B-169L <0.5 B-125L <0.5 ROSEOALE HIGHWAY B-126L., -5 %, <0.5 ~..~ CHARITY A~NUE ~UIW~ ~NSION) · B-O03 <0.5 AREA 94- B-O01 L <0.5 B-171L <0.5 B-186L <0.5 B- 124-L · B- 186M <0.5 <0.5 ti B-188L\ B-195L ~ <O.5 . <0.5, ~ ls 8'~L i -.B=4:72t, ~B-:185L · B- 185M I ~-1 <o.~j<o.~ <0.5 L ~EA 93 <0.5 _cB-009 12th B=t28L <0.$ 890 82 B-176L ©© 0 0 0 AREA AVENUE B- 128L .EW-07 ___ I ' 2ND 3RD AVENUE B-023 C S~EET 980 0<9300 0 0 C 0 O0 75L~.~. 340 /'-"~' 0 C O -~'¢ _, _I o JL 0 go;! ! REFINERY bgs pg/L EXPLANA T/ON MONITORING WELL AND NAME (showing benzene concentretion in microgroms per liter) EXTRACTION WELL AND NAME LINE OF EQUAL BENZENE CONCENTRATION (in pcj/L; doshed where inferred) BELOW GROUND SURFACE MICROGRAMS PER LITER PROPERTY BOUNDARY NOTE: ALL CONCENTRATIONS SHOWN IN pg/L. 0 600 ft. I i I SCALE I FIGURE 12 I BENZENE PLUME CONTOURS FOR GROUNDWATER >140' bgs, SHELL BAKERSFIELD REFINERY, TriHydro Corporation~1 BAKERSFIELD, CALIFORNIA 920 Sheridan Street I (August 2003) Laramie, Wyoming 82070 Drawn By: BW J C,ec~eu By: JR I Sca,a: ~"=e00' I Data: ~0/03/03 I.~f: 077BEN20030SL J. ROSEOAL£ HIGHWAY EXPL~N,~ i/ON ] 'iOI--6L~ [] E] .t. :j O1-12 WATER SUPPLY WELL AND NAME ~ I? ~1/~ i~)l ~ <0.,[~]_ I :~ j <0., (showing benzene concentration I D-6P ~ ' · in microgroms per liter) 'r J ~ ~ _ ~ U ~ <0.5 ~ ~ ~ 0 '~ ~g/L MICROGRAMS PER LITER . ~ - ~- : 0.~ .... PROPER~ BOUNDARY -X~ ~'~ C~I~ A~ ~NS~ON) C S~ <o., 0 o 0 I I-2 ~ I o ~ ,~ ~ sm~ 0 ~ AR~ 94 '- ...... ~ _ _l~ ~. ~[~ '~ o%__ cco 0 0 C 0 O0 ',~9o', AR~ 92 ' ~: _,,~ ~: :: = : : ~J B: : ~ : : 0 0 0 J'O 0 0 0 0 ~ _ " [t~;~ REBNE~ A~NUE ~ 0 600 ft. ( BENZENE RESULTS FOR .... . . ~1 ~lln~ NEARBY WATER SUPPLY WELLS, ~ -I- Corporation B~K~SFIfi~, ~LIFO~I~ ~l~ ".. () . 0 j' 1,,: Laramie, ~oming 82070 lB- 194L/M/U lB- 193L/M/L lB-192L/M/b B B-( Oo AREA 93 8--02 8--036 ROSEDALE HIGHWAY ar'] 1B-O49L/M/U -°~'~L/M/u r~ AREA 9~ :QQ, Oc70 O0 0 0 0 0 AREA 91 c STREET d d B-198L B- 197L/M/U - F'~o~u ' ~ 3RD AVENUE O0 o !i'o o qio ,, -. __-'u .qlO j' QQ~ 0 0 AVENUE oo-I-q EXPLANA [/ON B-O97L/M/U AIR SPARGING WELL AND NAME .... PROPERTY BOUNDARY 0 600 ft. I I I SCALE TriHydro Corporation 920 Sheridan Street Laramie, Wyoming 82070 Drawn By: DS I Checked By: FIGURE 14 AIR SPARGING WELL LOCATIONS, SHELL BAKERSFIELD REFINERY, BAKERSFIELD, CALIFORNIA !JR J sca~e: ~"=6oo' J Date: 01/30/03 J Ref: 077ASWELLS \ \ PROPERTY UNE A3-01 5/03 MTBE ND(1 ) B N0(0,5) T NO(l) X ND(2) TPH ND(100) A3-01 354.'18 000 ARE 3 BATTERY UMITS PROPERTY UNE ;a~3-02 A3-02 5/03 J MTBE ND(l) B ND(0.5) T ND(l) E ND(l) X ND(2) TPH ND(100) A3-03 MTBE B T E X TPH 5/03 49 510 11 ND(l) 8.2 2,200 \ \ A3-0¢ 347.04 A3-04 5/03 MTBE ND(1 ) B 8.0 T 1.6 E ND(l) X ND(Z) TPH 370 TriHydro Corporation 920 Sheridan Street Laramio, Wyoming 82070 I Drawn By: BW I Checked By: JR J ~5 01 EXP I.~ N,4 TI O N MONITORING WELL AND NAME (showing potentiometric-su rface elevation in feet above mean sea level) .~-~J45---' LINE OF EQUAL ELEVATION OF , POTENTIOMETRIC SURFACE ~ (in feet above mean sea level; dashed where inferred; hachures 'i delineate depressions in the i potentiometric surface) i/ DIRECTION OF GROUNDWATER FLOW ] IJg/L MICROGRAMS PER LITER .... PROPERTY BOUNDARY MTBE METHYL TERT BUTYL ETHER B BENZENE T TOLUENE E ETHYLBENZENE X XYLENES TPH TOTAL PETROLEUM HYDROCARBONS i ND NOT DETECTED NOTE: 'ALL CONCENTRATIONS SHOWN IN /Jg/L. 0 300 ft. I I I SCALE FIGURE '15 POTENTIOMETRIC MAP FOR GROUNDWATER AND GROUNDWATER ANALYTICAL RESULTS, AREA 3, SHELL BAKERSFIELD REFINERY, BAKERSFIELD, CALIFORNIA (August 2003) Scale: 1" = 300' IDate: 10/06/03 J Ref: 077AREA3PS200308 JL B-167U ~. mB-130U 18-131U lB-115M 2,?/$$ · · B-1 14-M II II 2.2/76 B-100M · ~-103M DP2 8.1/50 B-1 96U · 1.1/t79 · e-0'52u t .31209 · MN2AU · B-104M 9.71t28 *'i'* 0.2/98, .I II ''i/~: ........... : ....lr ROSEDALE HIGHWAY B- 169U 5.9/180 28U B-171U 2.51t44 70U ~ B-170M 1.4/60 · 3-- 1 25U B- 1 86U B-O44M t 1.4/165 5.81167 B-187U B-195U 0.9/222 ELI "/ · B- 18b'~,1 · 0.11ZZ ___ · B-O50M 3.7/199 50M 6.7/17 B-O01U ~EA 94 ,B-178U 4.1/228 l~-~ · 0'6/i2 B- ~ 82U- T "0.2/-8~__] B-T88U [0.5/-86 AVENUE 0.21'$5~ 00 3RD AVENUE 12th 0.7/-66 7.1194 0 AREA g~ 0 B-121M ·3.7/77 © OeO r'l --G 0.31-114 B-108M 0.4/-69 aco 0 0 C 0 O0 ' () B-Io~M' dSM · oB-11OM 0.2/-66 - i REFINERY AVENUE TriHydro Corporation 920 Sheridan Street Laramie, V~toming 82070 Drawn By: BW I Checked By: B-121M 3.7/77 bgs pg/L EXP~AN~ ?/ON MONITORING WELL AND NAME (showing Dissolved Oxygen concentrotion in milligrems per liter/Oxidotion Reduction Potentiol in millivolts) LINE OF EQUAL BENZENE CONCENTRATION (in /Jg./L; doshed where inferred) LINE OF EQUAL METHYL TERT- BUTYL ETHER (MTBE) CONCENTRATION (in pcj/L; dashed where inferred) BELOW GROUND SURFACE MICROGRAMS PER LITER PROPERTY BOUNDARY 0 600 ft, I I I SCALE FIGURE 16 DO/ORP RESULTS FOR GROUNDWATER <110' bgs, SHELL BAKERSFIELD REFINERY, BAKERSFIELD, CALIFORNIA (August 2003) ~,,=~00, I Date: 10/24/03 I Ref: 077DORP200308U B-1 8.8/137 ROSEDAI E HIGHWAY B-130M · 7.11128 _E-3 L] I '1' B~ 168M 0.3/-2 RS-MN2B 3,' 0.2142 B-IOOL · · B-IOSL 0.3~8 RS-DP7 E;a _uF.? · 7.,9181 · RS-BW4 i RS-MSSA : · 1.3152 , RS-DR5 , · 0.8/-76 i B-O24U RS_MS2.5C· , 9.9129 ,!._ ..,.,.~.::. ~. _~ ~._._..=..,.,:._ .~ j 180M· <:' [-] 9.11182 '/~ B-181M ,B-126M 9.61140 CHN~rTY AVENUE: '(FRUITVALE EXTENSION) 171M ~i] 9.1/t74 9.2/177 B-O44L 3-125M t2.8/39 . 5.7197 B-187M B-195M ~. 4.3/71 0.117. · Rs£bP6 '~ AREA 92 B-41L AREA 93 B-11 1L - ~ F----~ B- 1.28M 10.8/125 B-O50L· 8.5/148 B-O0 I:M 8.6~60 AREA 9,~ 78M 6.6116 AVENUE 3RD AVENUE .L 0 AREA 91 o - , C STREET oo-o,, [ ,o00 i · B-11 OL n i!o o'0 ,OOOOOO JOOOOO0 0/oooooo : ' o c.' ~ c'~: q ...... PW-:L23 · 9.8148 ........... ~ _=_= ~,Lr p__ _il °co o o C o aa /"-'~: O k ;~B_iO,6L ,.~ _._r~,,;,~ 8.4/82 © :i C) REF3NERY AVENUE EXPLANATION iB-128M MONITORING WELL AND NAME 10.51128 (showing Dissolved Oxygen concentration in milligrams per liter/Oxidation Reduction Potential in millivolts) .-----~---- LINE OF EQUAL BENZENE CONCENTRATION (in pc4/L; dashed where inferred) -"T'-- ! --' LINE OF EQUAL METHYL TERT- MTBE BUTYL ETHER (MTBE) CONCENTRATION (in pcj/L; dashed where inferred~ METHYL TERT-BUTYL ETHER bgs BELOW GROUND SURFACE , ~ug/L MICROGRAMS PER LITER .... PROPERTY BOUNDARY 0 600 ft. I I I SCALE FIGURE 17 r DOIORP RESULTS : FOR GROUNDWATER 110' - 140' bgs, ~ ; SHELL BAKERSFIELD REFINERY, TriHydro Corporation t BAKERSFIELD, CALIFORNIA 920 Sheridan Street [ (August 2003) Laramie, V~/oming 82070 Drawn By: BW I Checked By:~iLB I sca,e: 1"=600' I Date: 10/06/03 IRef: 077DORP200308M · ~ ,osE~,~ ,,o,w,¥ " - ~ /~..-/.~ L ~ . ' ~ ~//A'~--= Lu ~ '~ ,~--~v ~, ~-:=4,~.,,- ;:u~o q/'g: : ~ c. ~/ ~ 1':~7-~, ~ ~ )/ _ ~ , __~ ~ ~ I~,; ~: ,, ] . . ' 10,81126 (showing Dissolved Oxygen concentration in milligrams per liter/Oxidation CONCENTRATION (in p~JL; doshed where inferred) //// I:[, :I:1 'F~ 1491'08. ~~~~. - o~ %~.%~.:~~ [~7.91.60181L j~' ::--]i'~ ~ i '~ ~ ~ (~-~/ /I .~ 1---' Bu~LLINE OF~HEREQUAL(MTBE)METHYL TERT- // / ~fl---:;--J ~~~~ /B-126L .. ~ I~ ,~FI'~--I~I~[~ ~"~ ~ ~ CONCENTRATION (in /// i / .,~ ~// / ,,.~/t4~ .... C,? . IL 'l~l~ I:Ht~.,¢¢.~ I b~ I d~sh~d where inferred) ~ ' .-"' B~166L ," ~R~ 9~ , ~ ~ L2 ' 1 19b" ~ .B~ ..... ~~ ~ ~, ]-O01b L~ ~411'l~~r-,ff m BELOW GROUND SURFACE ~ . : B-130L2 B-130L1 ---~-.--~.at s.s.. ,/ all~~~1: ' I " pg/L MICROGRAMS PER LITER ~- ,. · .~.. ~,~ ..,.. ~ ~24.~:~oo om ~ ~,11~~~/ .~- , .... PROPER~ BOUNDARY ~" , .B- 1 29L2 ' ~j ~' - i ' ~ '~' ::::::::::::::::::::::::::::::::::: ~::~-t:~:~:~:--=..-,~ .... ~--~d, ~'~, ...... -,.~-"E~ ~:-T";~~~-~-,~~ - ~- ~ , ~ ~ ' - ] I~ 0 2118 ~ ~ 0.31~,__~_! ] ~ ~~~ ~ ~ ~'~1 16L I o.,,.,o ,, . ~ B-O07 / ~ X 11-199 1/11 ~ ~_1/ ,=~ ~'~ .- O o o [",i ~ .... t , B; , e I; ..... -U. .~E. [ .... a ~'-~ n-:'~-~ I ' I //// II 0 600 fi, i ~ ~ : := .......... - " .~ SCALE i ''- ~'1 : 1~ ~ ' ' B-OIO - . ---, , - ..... ~ ..... ' I ~ FOR GROUNDWATERDO/ORP RESULTS ~t ', [ I ~ Irr : ~ ~ 'I.L:~ E'..//~? :: i ~ SHELL BAKERSFIELD REFINERY, , ,~ .-~ . _ . . , ~ - _ ~2. }:~ TriHydro I ~L ~ j~ '-~ Il __~c ~ Corporation BAKERSFIELD, CALIFORNIA ~ L-~.,. ....... ~,: ~~] :$!' ~li < - : ,~o~,.,~.n~,., [ (AU~U.~00~) -~ ' - ; ~' 't ~ " ~:~:~':~:~: =: - - ': ..... ,. :CI . II Laramie, ~oming 82070 ~ I [ I ............... ~-' ~ ..... ~ ......... Drawn ~y: ~w I Checked By:~L~ I S~,e: ~"=~00' IDate: ~°/26/°3 I Ref: 077DORP20030SL i