Analysis of Background Metals Former Avila Tank Farm ... · Addendum No. 2 to Background Metals Report Former Avila Tank Farm Page 2 Avila Beach, California May 18, 2008 environmental

Appendix H

Analysis of Background Metals Former Avila Tank Farm Addendum No. 2

May 18, 2008 Project No. 1190.002

Mr. Josh Fridell Project Manager CHEVRON EMC 276 Tank Farm Road San Luis Obispo, California 93406

Addendum No. 2 Analysis of Background Metals

Former Avila Tank Farm Avila Beach, California

Dear Mr. Fridell:

To evaluate the former Avila Tank Farm (Site) for potential future uses, Chevron retained contactors to prepare human and ecological risk assessments. To ensure that these documents addressed regulatory concerns, Chevron assembled the Avila Tank Farm Collaborative Assessment Team (ATCAT), a stakeholder group including representatives from San Luis Obispo County and the State of California. One of the first tasks undertaken by the ATCAT was identification of the constituents of potential concern (COPCs) at the Site. With regard to inorganic constituents (i.e., metals), this first required identification of background constituents and concentrations. A report entitled Final Draft, Analysis of Background Metals, Unocal Avila Tank Farm, Avila Beach, California (Report), was cooperatively prepared by Avocet Environmental, Inc. (Avocet) and BBL Sciences, Inc. (BBL) and submitted to the ATCAT on September 10, 2004. Since that time, two issues have arisen prompting this second addendum to the Report. The first pertains to the fact that since the Report was prepared 114 additional soil samples have been collected at the Site and tested for the presence of the 17 California Assessment Manual (CAM) metals. For the most part, the results of these additional tests were within the historical range of concentrations. Two exceptions included barium (Ba) and molybdenum (Mo), which were detected in at least one sample at concentrations greater than the historical maximum. The other issue relates to the discovery that twenty thallium (Tl) samples represented as non-detects (less than [<] 5 milligrams per kilogram [mg/kg]) in the Report actually contained reportable concentrations ranging from 5.5 to 10 mg/kg. The purpose of this second addendum to the Report is to address these additional detections of Ba, Mo, and Tl and determine whether they are elevated above background concentrations.

BACKGROUND

Detailed discussions of the approach (comparative data assessment and spatial analysis), site background and geology are presented in the Report and will not be reiterated herein. In brief, Site and background soil and bedrock soil samples were analyzed by a state-certified

Addendum No. 2 to Background Metals Report

Former Avila Tank Farm Page 2 Avila Beach, California May 18, 2008

environmental testing laboratory for the 17 CAM metals. The vast majority of these samples were tested by ZymaX envirotechnology, Inc. (ZymaX); but ZymaX stopped accepting samples in April 2005 and subsequent tests were conducted by BC Labs (2005 to 2007) and TestAmerica (2008). Some of the variability observed in the data set may be attributable to this difference. For the metals considered herein (Ba, Mo, and Tl) the data set (on-site and background) consists of 396 samples. The background data set consists of 19 samples, all of which were collected from 11 off-site locations underlain by geologic materials similar to those occurring on site. The on-site data set consists of 377 samples for all metals. The background and on-site sample locations are depicted on Figure 1. Nondetect values were assigned a concentration equal to one-half the detection limit for all statistical and graphical analyses. Table 1 summarizes the analytical data for Ba, Mo, and Tl and the complete data sets are included in Attachment 1.

Table 1 Summary of Metals Analytical Data

(Concentrations in wet weights)

Metal

Practical Quantitation

Limit(s) (mg/kg)

Total Number

of Analyses

Total Number of Detectable

Values

Percent of Detectable

Values

Range of Concentrations

Detected (mg/kg)

Barium 0.5 396 396 100% 1.3 to 970 Molybdenum 1, 2, 2.5, 4, 12(1) 396 89 22% 1.0 to 37 Thallium 5, 9.9, 10, 20(2) 396 27 7% 0.74J to 16

Notes: (1) The vast majority of PQLs for barium are <1 and <2 mg/kg. (2) The vast majority of PQLs for thallium are <5 and <9.9 or <10 mg/kg.

COMPARATIVE METHODS

Statistical Methods Two comparative methods were used to evaluate the on- and off-site data in this assessment: 1) a statistical analysis, which included comparisons of central tendency and upper tails of the on- and off-site data sets; and 2) an exploratory data analysis, which included evaluation of cumulative probability plots and box plots of the complete data set.

The statistical evaluation consisted of three main steps. First the distribution of the each data set was tested (using either the Shapiro-Wilks or Lilliefors test). Second, the central tendencies of the site and background data sets were compared (depending on the distribution of the data set, either parametric or nonparametric analyses were used [i.e., t-test, Wilcoxon Rank Sum/Mann Whitney U Test, Gehan Test, or the Two Sample Test of Proportion]). Third, the upper tails of the site and background data sets were compared (using the Quantile test)1. ProUCL was used to perform the Quantile tests.

1 In the Report, both the Slippage and Quantile tests were used to compare the upper tails of the Site and background data sets. However, only the Quantile test was performed in this re-evaluation since the Slippage test is no longer



Graphical Methods Graphical methods were employed to aid in the characterization of background metals concentrations at the Site. The technique utilizes cumulative probability plots to estimate threshold values between anomalous and background populations and to identify apparent data distributions and outliers. For the purposes of this document, anomalous populations are defined as data points that are inconsistent with what would naturally be expected. Anomalous data points, indicated by an inflection in the plot, may be, but are not necessarily, indicators of anthropogenic contamination.

Two probability graphs were prepared for each of the three metals – one with concentrations plotted on an arithmetic scale and the other with concentrations plotted on a logarithmic scale. Each of the logarithmic plots includes three curves:

• One comprised of all available samples (including samples from on-site and off-site locations)

• A second comprised of all off-site samples

• A third comprised of all samples collected at depths of 10 feet or greater. This curve was added to supplement the off-site samples curve due to the low potential for metals contamination at depth at petroleum sites.

The probability plots used to identify the background threshold concentrations for the metals are presented in Attachment 2.

Spatial Methods To aid in the discrimination of hot spots, the data were color-coded by probability quartile – first quartile (0 to 25 percent) green; second quartile (25 to 50 percent) blue; third quartile (50 to 75 percent) yellow; fourth quartile (75 to 100 percent) orange – and plotted on the figures. For metals with large numbers of nondetect data (Mo and Tl), only the detect values were considered in the quartile plots. Where anomalous populations were identified, the anomalous data points were color-coded red and are also depicted in the figures. At data points with multiple samples, the data point was color-coded according to the highest concentration detected. All concentrations shown on the plots are for wet weight analysis.

RESULTS

Summary statistics and the results of the comparative statistics, including box and whisker plots, are presented in the following sections, which address each of the metals individually. The results of the spatial analysis, including the cumulative probability plots and maps of the sample

supported by our statistical software. Since both tests compare the upper tails in a very similar method, this change should not affect the results.



concentrations color-coded by quartile, are presented in the Figures and Attachment 2 following the text of this report.

Barium All 396 samples tested for the presence of barium (Ba) contained detectable concentrations ranging from 1.3 to 970 mg/kg (Attachment 1). Ba concentrations in off-site samples range from 6.8 to 750 mg/kg. Descriptive statistics for Ba can be found in Table 2. A comparison of the site and background Ba data sets is illustrated in the box and whisker plots shown below. As can be seen, the background data set has a higher median concentration and larger interquartile range, while the site population contains a greater number of values characterized as “outliers.” Table 3 presents the output of the distribution tests and Table 4 the results of the comparative statistics. Because of its nonnormal distribution, the Mann-Whitney Test was conducted. Based on the statistical evaluations, it is concluded that the site and background medians are significantly different; however, the background median is greater than the site median. The results of the Quantile test indicate that the tails of the site and background distributions are not significantly different.

Table 2: Descriptive Statistics for Barium Descriptive StatisticsData Valid N Mean Median Min Max Percentile* Percentile* Variance Std.Dev. CV

95 99Ba - All 396 76.80 54 1.3 970 180 550.8 9430.83 97.11 1.26Ba - On-site 377 73.47 54 1.3 970 170 529.2 8039.55 89.66 1.22Ba - Bkgrd 19 143.02 94 6.8 750 1.7 1.9 34156.21 184.81 1.29

Table 3: Summary of Distribution Tests for Barium Distribution TestingData N Lilliefors

p W p Distribution Result OutcomeBa - On-site 377 p < .01 NA NA not normalLN(Ba - On-site) 377 p < .01 NA NA not lognormalBa - Bkgrd 19 NA 0.6700 0.0000 not normalLN(Ba - Bkgrd) 19 NA 0.9530 0.4410 lognormal

Shapiro-Wilks

non-parametric

lognormal

Conduct Mann-

Whitney



Box and Whisker Plots for Barium – Logarithmic Scale (Left), Arithmetic Scale (Right)

Table 4: Summary of Statistical Comparisons for Barium Comparative StatisticsTest p or Result

Rlargest<=KGehan TestMann Whitney 0.04 BG median is significantly higher than the site medianTwo Sample Test of ProportionsQuantile Test Rlargest<K Site upper tail not greater than background upper tail

Outcome

Site is not elevated above BG

Arithmetic and logarithmic probability plots of the Ba data are included in Attachment 2 and a plot of the concentration quartiles (samples with detectable concentrations only) is presented as Figure 2. The probability plots are interpreted to show the presence of at least two partially overlapping background populations. Although the median Ba concentrations in Obispo and Pismo Formation samples are not significantly different (approximately 41 mg/kg), the mean concentrations are (76 versus 45 mg/kg, respectively), indicating that the range of values (and maximum concentrations) present in the Obispo Formation is much greater than the range and maximum concentrations in the Pismo Formation. Two of the six highest Ba concentrations, including the third highest concentration (750 mg/kg), were measured in off-site samples collected from areas underlain by the Obispo Formation. Five of the ten samples containing the highest barium concentrations, including the two samples with the highest concentrations, were described as containing a substantial asphaltic component. These samples were collected from borings and trenches excavated on the southeast terrace – east of Fossil Point.

Inspection of the probability plots indicates a possible inflection point at a concentration of about 230 mg/kg. However, the presence of two off-site samples with Ba concentrations in excess of 230 mg/kg (500 and 750 mg/kg) indicates that naturally occurring Ba concentrations of 750 mg/kg (or greater) are possible. Therefore, the apparent 230 mg/kg inflection point probably marks a separation between background populations and not an anomalous population created by

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anthropomorphic contribution. Inspection of Figure 3 indicates that Ba concentrations are evenly distributed around the site. Although it is possible that the Ba in samples containing asphalt from the southeast terrace reflect an anthropomorphic contribution, given the probability and quartile map plots, Ba is not considered to be present at the site at concentrations significantly greater than background.

Molybdenum Of the 396 soil and rock samples tested for the presence of molybdenum (Mo), 89 (or 22 percent) contained detectable concentrations (1.0 to 37 mg/kg). Three off-site samples contained detectable Mo concentrations in the range of 1.2 to 2.2 mg/kg. Descriptive statistics for Mo can be found in Table 5. A comparison of the site and background Mo data sets is illustrated in the box and whisker plots. Due to the large number of less-than values, the site and background data sets have similar medians (equal to one-half the detection limit), neither data set exhibits a significant range or interquartile range (the range depicted reflects the range of non-detected values [half of <1.0 to <2.0 mg/kg]), and most of the detected values are characterized as outliers. The Site data set contains a greater number of detected and, therefore, outlier values than the background data set. Table 6 presents the output of the distribution tests and Table 7 the results of the comparative statistics. Due to the large number of less-than values, the site and background populations were compared using the Two-Sample Test of Proportions. However, because the background data set contains so few detected values, the test assumptions were violated and a test statistic could not be calculated. The results of the Quantile test indicate that the right tail (largest values) of the Site data set is greater than the upper (right) tail of the background data set. This is more likely a reflection of the much greater number of detected values in the Site data set than it is an indication that the data sets are statistically different.

Table 5: Descriptive Statistics for Molybdenum Descriptive StatisticsData Valid N Mean Median Minimum Maximum Percentile* Percentile* Variance Std.Dev. CV

95 99Mo - All 396 0.94 0.5 0.5 37 4.44 9.356 5.73 2.39 1.84Mo - On-site 377 0.95 0.5 0.5 37 4.565 9.622 5.99 2.45 1.84Mo - Bkgrd 19 0.67 0.5 0.5 2.2 1.84 2.2 0.20 0.45 0.67

Table 6: Summary of Distribution Tests for Molybdenum Distribution TestingData N Lilliefors

p W p Distribution ResultMo - On-site 377 p < .01 NA NA not normalLN(Mo - On-site) 377 p < .01 NA NA not lognormalMo - Bkgrd 19 NA 0.4580 0 not normalLN(Mo - Bkgrd) 19 NA 0.4710 0 not lognormal

non-parametric

non-parametric

Outcome

Two-sample test of proportions due to low frequency of detects

Shapiro-Wilks



Box and Whisker Plots for Molybdenum – Logarithmic Scale (Left), Arithmetic Scale (Right)

Table 7: Summary of Statistical Comparisons for Molybdenum Comparative StatisticsTest p or Result Outcome

Rlargest<=KGehan TestMann WhitneyTwo Sample Test of Proportions NA incalculable (too few detects)Quantile Test Rlargest=K Site upper tail greater than background upper tail

Arithmetic and logarithmic probability plots of the 89 Mo data points are included in Attachment 2 and a plot of the concentration quartiles (samples with detectable concentrations only) is included as Figure 3. These plots are interpreted to show the presence of only background populations, as well as one possible elevated anomalous data point (sample STR-6-1-0.5 [37 mg/kg] was collected from a trench on the southeast terrace and reportedly contained a substantial asphaltic component). Minor inflections in the curves are considered to be the result of differences in sample texture and/or mineralogy. It is noteworthy that unlike metals with anomalous populations, where the majority of anomalous samples are derived from shallow soil (i.e., less than 5 feet), the majority (60 percent) of samples containing elevated Mo (i.e., concentrations greater than 2 mg/kg) were derived from depths of 5 feet or more. The average depth of samples containing >2.0 mg/kg of Mo is more than 10 feet (compared to Pb, where the average depth of samples containing anomalous concentrations is less than 1.0 foot, Avocet, 2004a). Inspection of Figure 3 indicates that samples with upper quartile concentrations of Mo are evenly distributed around the site.

The Quartile test finding that the Site data set is elevated above background is not consistent with the results of the graphical and spatial analysis, which conclude with one possible exception that Site concentrations are not elevated above background. The power of the Quantile test to detect differences in populations is reduced when the number of available measurements is small – which is the case for the background data set. Therefore, the test result is probably more a

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Mo Concentration (m

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1

10

Bkgrd On-siteArea

0

10

20

30

40

Bkgrd On-site



reflection of the small background data set than it is an indication that the data sets are different. The conclusion that the Site Mo concentrations are not significantly elevated above background is based principally on the spatial analysis, which revealed that the majority of elevated Mo concentrations were detected in bedrock samples obtained from substantial depth and scattered locations. Based on this integrated evaluation, Mo is considered to occur on-site at concentrations generally consistent with background conditions. The one exception is the sample with the highest concentration, sample STR-6-1-0.5’, which may reflect an anthropomorphic contribution of Mo.

Thallium Of the 396 samples tested for the presence of thallium (Tl), 27 (or 7 percent) contained detectable concentrations (ranging from 0.74J2 to 16 mg/kg – 21 samples contained concentrations in excess of the reporting limit). Tl was not detected in any of the 19 offsite samples (<5 mg/kg). Descriptive statistics for Tl are summarized in Table 8. A comparison of the site and background Tl data sets is illustrated in the box and whisker plots. Inspection of the plots reveals that, due to the large number of the less-than values, the background and site data sets have similar medians (equal to one-half the detection limit) and the site data set exhibits no interquartile range (e.g., greater than 90 percent of the site measurements were less-than values and the range depicted effectively covers the range of non-detected values [half of <5.0 to <9.9 mg/kg]). The absence of a site interquartile range causes all of the detected site measurements to appear as “outliers.” Table 9 presents the output of the distribution tests and Table 10 the results of the comparative statistics. Due to the large number of less-than values, the site and background populations were compared using the Two-Sample Test of Proportions. However, because none of the background samples contained detected concentrations, the test assumptions were violated and a test statistic could not be calculated. The results of the Quantile test indicate that the right tail (largest values) of the Site data set is greater than the upper (right) tail of the background data set. Once again, this is more likely a reflection of the absence of detected values in the background data set than an indication that the data sets are statistically different.

Table 8: Descriptive Statistics for Thallium Descriptive StatisticsData Valid N Mean Median Minimum Maximum Percentile* Percentile* Variance Std.Dev. CV

95 99Tl - All 396 3.29 2.5 0.74 16 5.57 6.654 2.06 1.44 0.436Tl - On-site 377 3.33 2.5 0.74 16 5.6 6.673 2.13 1.46 0.438Tl - Bkgrd 19 2.50 2.5 2.5 2.5 2.5 2.5 0.00 0.00 0.00

2 Value is flagged as estimated (J) – the value is between the method detection limit (MDL: 0.37 mg/kg) and the practical quantification limit (PQL: 5.0 mg/kg). Six of the 27 samples contained estimated concentrations of thallium.



Table 9: Summary of Distribution Tests for Thallium Distribution TestingData N Lilliefors

p W p Distribution ResultTl - On-site 377 p < .01 NA NA not normalLN(Tl - On-site) 377 p < .01 NA NA not lognormalTl - Bkgrd 19 NA not normalLN(Tl - Bkgrd) 19 NA not lognormal

Shapiro-Wilks

non-parametric

Outcome

Two-sample test of proportions due to low

frequency of detectnon-parametricincalculableincalculable

Box and Whisker Plots for Thallium – Logarithmic Scale (Left), Arithmetic Scale (Right)

Table 10: Summary of Statistical Comparisons for Thallium

Comparative StatisticsTest p or Result Outcome

Rlargest<=KGehan TestMann WhitneyTwo Sample Test of Proportions NA can not be calculatedQuantile Test Rlargest=K Site upper tail greater than background upper tail

Site > Background

Before continuing with the graphical and spatial evaluations, it is noteworthy, that all but one of the samples containing Tl concentrations in excess of the PQL were detected in samples collected over the course of two days in June 2004 and analyzed by the laboratory (ZyamX) as part of a single batch of samples. For 20 consecutive samples from 10 locations, Tl was reported at concentrations ranging from 5.5 to 10 mg/kg. Tl was not detected in any of the 86 other samples analyzed before and after these 20 samples. It is very improbable, after so many non-detects, that 20 consecutive samples from 10 scattered locations would contain detectable concentrations (Figure 4 – see the 2nd through 4th quartile plots). Given the weight of evidence, these Tl results are more likely false positives and should not be included in the Site data set.

Arithmetic and logarithmic probability plots of the Tl data points (including the likely false positives) are included in Attachment 2 and a plot of the concentration quartiles (samples with detectable concentrations only) is included as Figure 4. Based on the shape of the plots and an

Area

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20

Bkgrd On-siteArea

Tl Concentration (mg/

0.1

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understanding of the spatial distribution of the concentrations, a possible inflection point is identified at a concentration of 6.8 mg/kg. Two sample points occur in the upper (anomalous) population. One of these points (S-42-0.5’), a likely false positive, is located within the northern-most area of the site bordered by Avila Beach Drive and Cave Landing Road. The highest concentration (16 mg/kg) was detected in sample containing a substantial asphaltic component (STR-6-1-0.5’), collected from a trench on the southeast terrace. Inspection of Figure 4 indicates that the concentrations appear randomly distributed (i.e., no apparent hot spots). Based on the absence of a hot spot and the evidence that all but one of the detected Tl concentrations are false positives, it is concluded that all but possibly one of the on-site Tl concentrations are within the background range. The asphaltic sample from trench STR-6-1-0.5’ may contain an anomalous concentration of Tl.

CONCLUSION

Based upon the statistical, graphical, and spatial comparative methods described herein, the

If you have any questions regarding this report or require additional information, please do not

Respectfully submitted,

VOCET ENVIRONMENTAL, INC.

ichael A. Rendina, C.E.G. 1426, C.HG. 292

AR:sh nts

nders – Strategic Initiatives, Arroyo Grande, CA (CD-ROM only)

& Game, Morro Bay, CA

rol Board, San Luis Obispo, CA

bispo, CA

metals Ba, Mo, and Tl occur on site at primarily background concentrations. Weight of evidence suggests that 20 of the 21 detected (>PQL) Tl results are false positives and should not be considered potentially anomalous concentrations. One sample, STR-6-1-0.5’, which contained a substantial asphaltic component and was collected from a trench on the southeast terrace, contained potentially anomalous concentrations of both Mo and Tl.

hesitate to call.

A MProject Manager MAttachmecc: Charles A Jennifer Holder – ARCADIS, Carpinteria, CA Melissa Boggs – California Department of Fish Regina Donohoe – California Department of Fish & Game, Monterey, CA Charles Lambert – McDaniel Lambert, Venice, CA Dan Niles – California Regional Water Quality Cont Teri Copeland – Consulting Toxicologist, Agoura Hills, CA Andrew Mutziger – Air Pollution Control District, San Luis O



S:\Projects\1190 URS-Avila Beach\002_AvilaHumanHealthRisk\Background Metals Re-Evaluation\Addendum 2 to Background Metals_051808.doc



REFERENCES

Avocet Environmental, Inc. and BBL Sciences, Inc., 2004a, Final Draft, Analysis of Background Metals, Unocal Avila Tank Farm, Avila Beach, California. Report dated October 15, 2004.

Avocet Environmental, Inc., 2004b, Addendum to Final Draft, Analysis of Background Metals, Unocal Avila Tank Farm, Avila Beach, California. Letter dated October 15, 2004.

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ExplanationAnalyzed for All 17 CAM Metals

Analyzed for Only Lead

Approximate Site Boundary

Local Geology

Qal - Alluvium

Qcol - Colluvium

Qt - Terrace Deposit

Tppg - Gragg Member, Pismo Formation

Tmo - Obispo Formation, Tuffaceous Sandstone

Tmod - Obispo Formation, Diabase

FORMER AVILA TANK FARMAVILA BEACH, CALIFORNIA

PREPARED FOR

CHEVRON INC.SAN LUIS OBISPO, CALIFORNIA

SOIL SAMPLES ANALYZEDFOR CAM METALS

FIGURE 1

ApproximateScale

0 300 600150

FEET

GMW-16

OB-WBO-PC-2'

OB-WBO-CS-2'

OB-SP-FH-0.5

OB-SO-RR-0.5

OB-SO-CS-0.5

OB-WBP-FSL-3'

OB-WBP-FH-0.5

OB-WBO-RR-0.5

OB-SP-FSL-0.5

OB-SO-PC-0.5'Avila Beach #2Avila Beach #1

Pirates Cove #2

OB-SP-FSA-0.5OB-WBP-FSA-0.5

Pirates Cove #1

OFF-SITESOIL SAMPLES

2,100

Feet

FIGURE 1A


PREPARED FOR


LOCAL GEOLOGIC MAP SHOWINGOFF-SITE SAMPLE LOCATIONS

V:\1

190_

Avi

la_B

each

_Che

vron

\119

0.00

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N ALLUVIAL DEPOSITS. Qal, UNCONSOLIDATED, STREAM DEPOSITED PEBBLES, SAND, SILT, AND CLAY.LOCALLY INCLUDES BEACH SAND.

CONTACT, DASHED WHERE APPROXIMATELY LOCATED, QUERIED WHERE INFERRED FAULT, DASHED WHERE APPROXIMATELY LOCATED, QUERIED WHERE INFERRED, DOTTED WHERE CONCEALED ANTICLINE, SHOWING TRACE OF AXIAL SURFACE. DASHED WHERE APPROXIMATELY LOCATED SYNCLINE, SHOWING TRACE OF AXIAL SURFACE. DASHED WHERE APPROXIMATELY LOCATED.

STRIKE AND DIP OF BED INCLINED STRIKE AND DIP OF FRACTURE APPARENT DIP - CIRCLED NUMBER REPRESENTS CORRECTION FOR 2X VERTICAL EXAGGERATION HYDROCARBON SEEPS WITH SAMPLE NUMBER SPRINGS - TUFA COMMON

COLLUVIAL DEPOSITS. Qcol, UNCONSOLIDATED, SAND, SILT AND CLAY.

SQUIRE MEMBER. Tpps, MASSIVE WHITE MEDIUM-TO COARSE-GRAINED SANDSTONE, LOCALLY BITUMINOUS SANDSTONE.

BELLEVIEW MEMBER. Tppb1, CLAYSTONE, SILTSTONE; Tppb2 BEDDED SANDSTONE AND SILT BECOMING SANDY WITH DIATOMITE BEDS.

GRAGG MEMBER. Tppg, MASSIVE WHITE SANDSTONE; Tppgb, LOCALLY BITUMINOUS SANDSTONE; Tppgc, CHERT, PEBBLE CONGLOMERATE.

MIGUELITO MEMBER. Tmpm, BROWN CLAY AND SILT, BECOMING MORE DIATOMACEOUS AND WITH CHERTY OR OPALINE SHALE BEDS, LOCALLY BITUMINOUS.

EDNA MEMBER. Tmpe, BITUMINOUS QUARTZ SANDSTONE, LOCALLY WITH PEBBLES AT BASE.

MONTEREY FORMATION. Tmmb, SILTSTONE OR CHERT AND BLOCKY WEATHERING DOLOMITIC CLAYSTONE OR SILT, LOCALLY BITUMINOUS; Tmmc, OPALINE OR CHERTY SHALE, SOME DOLOMITE.

OBISPO FORMATION. Tmo, FINE-TO-COARSE-GRAINED WHITE TUFF OR CRYSTALLINE TUFF, LOCALLY RESISTANT, SILICIFIED OR ZEOLITIZED TUFF; Tmod, DIABASE AND SOME TUFFACEOUS SILTSTONE OR TUFF.

OFF-SITE SHALLOW SOIL BORING

TERRACE DEPOSITS. Qt, UNCONSOLIDATED, SAND, SILT, CLAY, PEBBLES. DEPOSITS ON MARINE AND STREAM TERRACES

EXPLANATION

GEOLOGIC SYMBOLS

REFERNCE: 7.5 MINUTE U.S.G.S. TOPOGRAPHIC MAP OF PISMO BEACH, CALIFORNIA DATED: 1965 REVISED: 1994 MODIFIED FROM CLARENCE A. HALL, 1973

QU

AT

ER

NA

RY

Hol

ocen

e Pl

eist

ocen

e

Pism

o Fo

rmat

ion

TE

RT

IAR

Y

Plio

cene

M

ioce

ne

Qal

Qcol

Tpps

Tppb2

?Tppg

Tmpm

Tmpe

Tmmc

b

Tmo

Qt

d

1

b c

APPROXIMATE SITE BOUNDARY

61

48

35

35

35

11

6

14

16

29

10

6

20

30 32

35

35

45

85

75

45

55

50

30

50

45

20

19

25

21

31

40

22

HEAVY SAND DEPOSIT

?

?

?

?

? ?

51° 68°

11481-1

11460-1

11786-1

11460-3 11570-3

11460-2

11742-2,3

11742-2,3

12040-1

11570-4,5

11570-2

11742-1

Tppb1

Qal

Tppb1

Tppb1

Tppb1

Tppb2

Tmo

Tmo

Tmo

Tmo

Qt Tmo

Tmo

Tppg

Tppg

Qcol

Tpps

Tpps Tmo

Tppgb

Tppgb

Tppg

Tppg

Tppg

Tmpm

Tmpe

Tmpe

Tpps

Tmpe

Tmpe

Tmpm

Tmpm

Tppgc

Tmmc

Tmmc

Tmmc

Tmmc

Tmmb

Tmmb

Tmod

Qal

Qal

Tmmb

Qal

Qal

Tmod

Tmod

Tppg

Tppg

SAN MIGUELITO FAULT

0 400

SCALE

800 FEET

72

72

75

80

65

OB-SP-FSA OB-SP-FSA OB-WBP-FSA OB-WBP-FSA

OB-SP-FSA OB-WBP-FSA

OB-SP-FSL OB-SP-FSL OB-WBP-FSL OB-WBP-FSL

OB-SP-FSL OB-WBP-FSL

OB-WBO-CS OB-WBO-CS OB-SO-CS OB-SO-CS

OB-WBO-CS OB-SO-CS

OB-WBO-RR OB-WBO-RR OB-SO-RR OB-SO-RR

OB-WBO-RR OB-SO-RR

OB-WBO-PC OB-WBO-PC OB-SO-PC OB-SO-PC

OB-WBO-PC OB-SO-PC

OB-WBO-PC OB-SO-PC

OB-WBP-FH OB-WBP-FH OB-SP-FH OB-SP-FH OB-WBP-FH OB-SP-FH

~1,300 FEET NORTH ~1,300 FEET NORTH ~1,300 FEET NORTH

?

?

TruckLoading Rack

PumpHouse

RefineryArea

Qal

Tppg

Tmod

Tmo

Tmo

QcolTmo

Qt

Tmo

Tmmb

Qal

Tppg

B-14

B-16

B-65B-36

B-146

B-158 B-149

B-163

B-173

B-136B-216

B-130WL-4-2

WL-1-1

GS-1-0

S-50-01

S-49-01S-47-10

S-2-0.5

S-1A-03

S-42-0.5S-43-0.5

SV-56-01

SV-05-10S-44-0.5

S-41-0.5

S-9C-0.5

SV-06-05

S-38-0.5SV-50-05 S-38A-03

S-37-0.5SV-60-01

SV-53-05

S-19-0.5SV-62-01

SV-36-05

B-167-95

SV-35-01

S-29-0.5

S-25-2.5

S-28-2.5

SV-32-01

S-27-0.5

S-24C-0.5STR-8-1-0.5

STR-9-1-0.5

STR-4-2-1.5

STR-11-1-0.5

GS-5-2

GS-2-1

S-8-0.5

S-1C-04

S-1-0.5S-1B-01

SV-02-01

SV-03-01

SV-04-10

S-9D-0.5

S-38B-03

SV-37-05

S-14-0.5 S-30-0.5

S-21-0.5

GS-4-2.5

STR-5-1-0.5

STR-7-1-0.5

STR-6-1-0.5

STR-1-1-1.0

STR-1-2-1.0

STR-4-1-1.0

STR-10-1-0.5

STR-13-1-0.5

B-19

B-83

B-85

B-95

B-67

B-73

B-76

B-171

B-152

B-198

B-194

B-153

B-175B-114

B-131

B-217

B-119

B-215

BERM-1

WL-6-1BERM-4

WL-6-2

WL-5-1

BERM-2

BERM-3

S-48-01

S-26-0.5

S-24A-2.5

B-6

B-12B-94

B-84

B-49

B-31

B-53SP-5 B-86

B-46B-34

B-30

B-96

B-27

B-40

B-209

B-212

B-184

B-183

B-161

B-176

B-174

B-122B-191

B-140

WL-3-1BERM-6

WL-5-2

BERM-5

WL-2-2

S-4-2.5

S-3-2.5

SV-55-01

SV-41-01

SV-57-01

SV-08-01

S-40B-01S-40-0.5

S-13-0.5

B-186-56

S-18-0.5

SV-54-05

SV-38-01

S-33-0.5

S-23-0.5

S-24-0.5 S-24B-2.5

S-27B-2.5

B-50

B-47

B-89

B-210B-202

B-211

B-157

B-160

B-165

B-197

B-138

B-116B-104

B-196

B-117

WL-4-1

WL-2-1

S-6-2.5

S-5-0.5

S-9-0.5

S-7-2.5

SV-01-01

S-9B-0.5

SV-51-01 S-9A-0.5

S-40A-01

S-39-0.5

SV-45-05

S-17-2.5SV-52-01

S-36-0.5

S-10-0.5S-12-2.5 SV-61-01

S-35-0.5

S-34-2.5S-20-2.5

S-46-0.5

S-22-2.5

S-32-2.5 S-31-2.5

S-11C-0.5

S-11A-0.5

S-11B-0.5

S-27G-0.5

S-27F-2.5 S-27A-0.5

S-27C-2.5

S:\

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Sam

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Ana

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Bar

ium

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8

ExplanationChemical Concentration in mg/kg

First Quartile (1.3 to 40)

Second Quartile (41 to 53 mg/kg)

Third Quartile (54 to 74)

Fourth Quartile (75 to 970)


Local Geology

Qal - Alluvium

Qcol - Colluvium






PREPARED FOR


SOIL SAMPLES ANALYZEDFOR CAM METALS (BARIUM)BACKGROUND EVALUATION

FIGURE 2

ApproximateScale

0 300 600150

FEET

GMW-16

OB-SO-RR-0.5

OB-WBO-CS-2'

OB-SP-FSL-2'

OB-SP-FSA-0.5

OB-SO-PC-0.5'

Pirates Cove #2

Pirates Cove #1

OB-SP-FH-0.5

Avila Beach #1

Avila Beach #2


2,100

Feet

TruckLoading Rack

PumpHouse

RefineryArea

Qal

Tppg

Tmod

Tmo

Tmo

QcolTmo

Qt

Tmo

Tmmb

Qal

Tppg

B-76

B-160

B-138

B-131

GS-1-0

S-50-05

S-48-10

S-9-0.5

B-57-65

SV-01-10

SV-63-01

B-167-95

STR-8-1-0.5

STR-13-1-0.5

GS-5-2

GS-2-1

STR-7-1-0.5

STR-6-1-0.5

B-18

B-14

B-12B-16

B-49

B-52

B-47

B-56B-95B-86

B-80B-34B-30

B-89

B-96

B-27B-67

B-73

B-211

B-171

B-146

B-141

B-157B-183

B-161

B-174 B-114

B-197 B-173

B-116

B-196B-117

B-122

B-136B-217

B-216 B-130B-119

B-215

BERM-1

WL-6-1BERM-4

WL-6-2

WL-5-1WL-3-1

BERM-2WL-5-2WL-4-1WL-1-1

BERM-3

BERM-5

WL-2-2

S-47-10

S-6-0.5

S-5-0.5

S-3-0.5 S-7-0.5

S-2-0.5

S-1A-01

S-1C-01S-1-0.5

S-42-0.5S-43-0.5

SV-02-01SV-55-01

SV-05-05SV-03-01

S-44-0.5

S-9B-0.5 S-41-0.5SV-41-01

SV-04-01S-9C-0.5

SV-51-01

S-9A-0.5 SV-08-01

S-40B-01S-40-0.5

S-13-0.5S-38-0.5

S-17-0.5SV-52-01

SV-50-01S-38B-03

S-38A-03S-37-0.5

SV-53-01S-10-0.5 S-12-0.5

SV-54-02 S-19-0.5 S-35-0.5

SV-38-01 SV-62-01

S-34-0.5S-20-0.5

S-11-0.5

S-46-0.5SV-37-01 S-33-0.5

S-14-0.5 S-30-0.5S-21-0.5S-22-0.5

S-32-0.5S-31-0.5

SV-35-01

S-23-0.5

S-24-0.5 S-29-0.5

S-25-0.5

S-28-0.5

SV-32-10

S-27-0.5

S-26-0.5

S-11A-0.5

S-11B-0.5

S-24B-0.5

S-27G-0.5

S-27E-0.5S-24C-0.5

S-27F-0.5S-27A-0.5

S-27B-0.5S-27D-0.5

S-27C-0.5

B-53

B-65

B-202

B-184

B-158

B-159B-194

B-178B-165

B-179

B-191

B-140WL-4-2

S-36-0.5

STR-14-1-0.5

B-94B-83B-50 B-84

B-54

B-40

B-209

B-198

B-168

B-104

S-4-0.5

S-8-0.5

S-39-0.5

S-18-2.5

STR-9-1-0.5

STR-1-1-1.0

STR-10-1-0.5

B-6

B-85

SP-5

B-36

B-210

B-212

B-152

B-163B-153

B-175

BERM-6

S-49-10

SV-56-05

S-40A-01

SV-06-05

SV-45-05

STR-4-1-1.0

STR-11-1-0.5

S:\

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8


Non-Detect (<1.0 to <6.0 mg/kg)

First Quartile (1.0 to 1.4)

Second Quartile (1.4 to 2.2)

Third Quartile (2.2 to 3.7)

Fourth Quartile (3.7 to 37)


Local Geology

Qal - Alluvium

Qcol - Colluvium






PREPARED FOR


SOIL SAMPLES ANALYZEDFOR CAM METALS (MOLYBDENUM)

BACKGROUND EVALUATION

FIGURE 3

ApproximateScale

0 300 600150

FEET

Pirates Cove #2

Pirates Cove #1

GMW-16

OB-SP-FH-0.5

OB-SO-RR-0.5

OB-SO-CS-0.5

OB-SP-FSL-2'

OB-SP-FSA-0.5

OB-SO-PC-0.5'

Avila Beach #1

Avila Beach #2


2,100

Feet

TruckLoading Rack

PumpHouse

RefineryArea

Qal

Tppg

Tmod

Tmo

Tmo

QcolTmo

Qt

Tmo

Tmmb

Qal

Tppg

S-48-10

B-6 B-18

B-19

B-14

B-12B-16 B-94

B-83

B-50B-84

B-49B-52

B-54

B-31 B-85B-47SP-5

B-56B-95B-86

B-80B-46

B-34B-30

B-89

B-96B-65

B-36

B-27B-67

B-40

B-73

B-76

B-209

B-210B-202

B-211

B-212

B-171

B-146B-184

B-152B-149

B-141

B-157B-183

B-159B-194

B-161

B-163B-153B-165

B-179

B-175

B-174B-114

B-197 B-173

B-138

B-116B-104

B-196B-117

B-122B-191 B-131

B-136B-217

B-140B-216 B-130B-119

B-215

BERM-1

WL-6-1BERM-4

WL-6-2

WL-5-1

BERM-6BERM-2

WL-5-2WL-4-1WL-4-2

WL-1-2

BERM-3

BERM-5

WL-2-2

WL-2-1 GS-1-0

S-50-10

S-48-01

S-49-01S-47-01

S-6-0.5

S-5-0.5

S-4-0.5S-9-0.5

S-3-0.5 S-7-0.5

S-2-0.5

S-1A-01

S-1C-01S-1-0.5

SV-01-01

S-43-0.5

SV-02-01SV-55-01

SV-56-01SV-05-01

SV-03-01S-44-0.5

S-9B-0.5 S-41-0.5SV-41-01

SV-04-05S-9C-0.5

S-9A-0.5

SV-08-01

S-40A-03S-40-0.5 SV-06-10S-39-0.5

S-13-0.5SV-45-05

S-38-0.5S-17-0.5

SV-52-01SV-50-05 S-38B-03

S-38A-03S-18-0.5

S-36-0.5

SV-53-01S-10-0.5 S-12-0.5

SV-54-02S-19-0.5

S-35-0.5

SV-38-01

S-34-0.5S-20-0.5

S-46-0.5 S-33-0.5SV-36-01

S-30-0.5S-21-0.5S-22-0.5

S-32-0.5S-31-0.5

SV-35-01

S-28-0.5

SV-32-10

S-27-0.5

S-11C-0.5

S-11A-0.5

S-11B-0.5

S-27G-0.5

S-27E-0.5S-24C-0.5

S-27F-0.5S-27A-0.5

S-27B-0.5S-27D-0.5

S-27C-0.5

STR-8-1-0.5

STR-4-1-1.0

STR-5-1-0.5

STR-1-1-1.0STR-4-2-1.5

STR-10-1-0.5

STR-11-1-0.5

STR-13-1-0.5

S-16-2.5

S-11-2.5

S-24-2.5S-29-0.5

S-25-2.5

S-26-2.5

S-37-2.5

S-14-0.5

S-23-2.5

STR-6-1-0.5

S:\

GIS

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Ana

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Non-Detect (<2 to <25 mg/kg)

First Quartile (0.74 to 3.2)

Second Quartile (5.5 to 5.9)

Third Quartile (6.0 to 6.1)

Fourth Quartile (6.2 to 6.8)

Anomalous (>6.8 mg/kg)


Local Geology

Qal - Alluvium

Qcol - Colluvium






PREPARED FOR


SOIL SAMPLES ANALYZEDFOR CAM METALS (THALLIUM)

BACKGROUND EVALUATION

FIGURE 4

ApproximateScale

0 300 600150

FEET

Pirates Cove #2

Pirates Cove #1

GMW-16

OB-SP-FH-0.5

OB-SO-RR-0.5

OB-SO-CS-0.5

OB-SP-FSL-2'

OB-SP-FSA-0.5

OB-SO-PC-0.5'

Avila Beach #1

Avila Beach #2


2,100

Feet

Attachment 1

Summary of Analytical Data for Metals

Table A-1All Samples Tested for Barium

Avila Tank Farm, Avila Beach, California(Concentrations in mg/kg)

On-site? Sample Location Depth (ft) Date Sampled

Geologic Unit Ba Abs. Freq. Cum. Freq. Probability

Yes S-33-2.5 2.5 6/4/2003 Soil-P 1.3 1 1 0.25Yes S-48-05 5 7/10/2007 Obispo 5.9 1 2 0.50Yes B-217 45 4/2/2003 Obispo 6.2 1 3 0.76No GMW-16 45 4/23/1997 Obispo 6.8 1 4 1.01Yes S-48-10 10 7/10/2007 Obispo 7.2 1 5 1.26No Avila Beach #1 0 7/28/1999 Obispo 8.5 1 6 1.51Yes B-117 25 8/29/1997 Pismo 8.6 1 7 1.76Yes SV-56-10 10 7/10/2007 Obispo 9.6 1 8 2.02No OB-WBP-FH-0.5 0.5 6/6/2003 Pismo 11 1 9 2.27Yes B-203 50 2/26/2001 Pismo 15 1 10 2.52Yes B-217 5 4/2/2003 Soil-O 18 1 11 2.77Yes B-76 15 9/3/1997 Obispo 19 5 16 4.03Yes B-76 25 9/3/1997 Obispo 19 5 16 4.03Yes S-26-2.5 2.5 6/5/2003 Soil-O 19 5 16 4.03Yes SV-06-10 10 7/12/2007 Obispo 19 5 16 4.03Yes SV-55-10 10 7/10/2007 Obispo 19 5 16 4.03Yes B-131 25 8/26/1997 Obispo 20 5 21 5.29Yes B-197 130 7/22/1999 Pismo 20 5 21 5.29Yes BERM-1 0.5 9/21/1997 Tar/Soil-P 20 5 21 5.29Yes BERM-2 0.5 9/21/1997 Tar/Soil-P 20 5 21 5.29Yes BERM-4 0.5 9/21/1997 Tar/Soil-P 20 5 21 5.29No Avila Beach #2 0 7/28/1999 Obispo 21 5 26 6.55Yes S-26-0.5 0.5 6/5/2003 Soil-O 21 5 26 6.55Yes S-45A-0.5 0.5 1/14/2004 Soil-O 21 5 26 6.55Yes BERM-3 0.5 9/21/1997 Tar/Soil-P 21 5 26 6.55Yes SV-01-05 5 7/11/2007 Obispo 21 5 26 6.55Yes B-178 5 7/20/1999 Pismo 22 2 28 7.05Yes S-21-2.5 2.5 6/5/2003 Pismo 22 2 28 7.05Yes B-210 21 3/1/2001 Pismo 23 2 30 7.56Yes B-216 15 4/2/2003 Soil 23 2 30 7.56Yes B-210 15 3/1/2001 Pismo 24 3 33 8.31Yes B-212 11 3/2/2001 Pismo 24 3 33 8.31Yes SV-01-10 10 7/11/2007 Obispo 24 3 33 8.31Yes B-18 5 9/26/1997 Soil-P 25 5 38 9.57Yes B-184 90 7/22/1999 Pismo 25 5 38 9.57Yes B-198 30 2/26/2001 Soil-P 25 5 38 9.57Yes B-210 10 3/1/2001 Pismo 25 5 38 9.57Yes SV-55-05 5 7/10/2007 Obispo 25 5 38 9.57Yes B-67 5 9/4/1997 Pismo 26 1 39 9.82Yes B-119 5 9/2/1997 Pismo 28 3 42 10.58Yes B-215 5 5/29/2002 Pismo 28 3 42 10.58Yes SV-38-05 5 7/12/2007 Obispo 28 3 42 10.58Yes B-85 5 9/19/1997 Pismo 29 2 44 11.08Yes S-48-01 1 7/10/2007 Soil-O 29 2 44 11.08Yes B-83 85 9/23/1997 Pismo 30 4 48 12.09Yes B-198 10 2/26/2001 Soil-P 30 4 48 12.09Yes S-40B-03 3 7/16/2007 Pismo 30 4 48 12.09Yes SV-54-02 2 7/9/2007 Soil-P 30 4 48 12.09Yes B-203 11 2/26/2001 Soil-P 31 3 51 12.85Yes S-3-0.5 0.5 6/4/2003 Pismo 31 3 51 12.85Yes SV-08-05 5 7/12/2007 Pismo 31 3 51 12.85

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Yes B-216 25 4/2/2003 Soil 32 2 53 13.35Yes SP-5 55 3/4/2001 Obispo 32 2 53 13.35Yes B-19 5 9/25/1997 Soil-P 33 6 59 14.86Yes B-212 21 3/2/2001 Pismo 33 6 59 14.86Yes S-40-2.5 2.5 6/5/2003 Pismo 33 6 59 14.86No OB-SP-FH-0.5 0.5 6/6/2003 Soil-P 33 6 59 14.86Yes WL-6-1 0 2/24/2005 Soil-P 33 6 59 14.86Yes WL-6-2 0 2/24/2005 Soil-P 33 6 59 14.86Yes B-171 15 11/24/1997 Soil-P 34 6 65 16.37Yes S-4-0.5 0.5 6/4/2003 Soil-P 34 6 65 16.37Yes S-13-2.5 2.5 6/5/2003 Pismo 34 6 65 16.37Yes S-23-2.5 2.5 6/5/2003 Pismo 34 6 65 16.37Yes S-24A-0.5 0.5 1/14/2004 Soil-O 34 6 65 16.37Yes S-27F-0.5 0.5 1/13/2004 Soil-O 34 6 65 16.37Yes B-114 5 8/27/1997 Pismo 35 7 72 18.14Yes B-152 50 11/23/1997 Pismo 35 7 72 18.14Yes B-152 125 11/25/1997 Pismo 35 7 72 18.14Yes B-153 75 11/26/1997 Pismo 35 7 72 18.14Yes SV-05-05 5 7/11/2007 Obispo 35 7 72 18.14Yes SV-32-10 10 7/13/2007 Obispo 35 7 72 18.14Yes SV-60-05 5 7/10/2007 Soil-P 35 7 72 18.14Yes B-48 5 9/25/1997 Soil-P 36 7 79 19.90Yes B-209 6 3/2/2001 Pismo 36 7 79 19.90Yes B-210 31 3/1/2001 Pismo 36 7 79 19.90Yes B-211 11 3/2/2001 Pismo 36 7 79 19.90Yes S-25-0.5 0.5 6/5/2003 Pismo 36 7 79 19.90Yes SV-57-05 5 7/12/2007 Pismo 36 7 79 19.90Yes WL-5-1 0 2/24/2005 Soil-P 36 7 79 19.90Yes B-194 50 7/19/1999 Pismo 37 2 81 20.40Yes S-27-2.5 2.5 6/5/2003 Soil-O 37 2 81 20.40Yes B-73 1 9/3/1997 Pismo 38 7 88 22.17Yes B-209 21 3/2/2001 Pismo 38 7 88 22.17Yes S-10-2.5 2.5 6/4/2003 Pismo 38 7 88 22.17Yes S-31-0.5 0.5 6/4/2003 Soil-P 38 7 88 22.17Yes S-11A-2.5 2.5 1/14/2004 Soil-O 38 7 88 22.17Yes S-24A-2.5 2.5 1/14/2004 Soil-O 38 7 88 22.17Yes S-27D-2.5 2.5 1/14/2004 Soil-O 38 7 88 22.17Yes B-95 5 9/18/1997 Soil-P 39 5 93 23.43Yes B-175 5 7/19/1999 Pismo 39 5 93 23.43Yes S-32-0.5 0.5 6/4/2003 Soil-P 39 5 93 23.43Yes S-27B-0.5 0.5 1/13/2004 Soil-O 39 5 93 23.43Yes S-50-10 10 7/11/2007 Obispo 39 5 93 23.43Yes B-153 110 11/26/1997 Pismo 40 1 94 23.68Yes B-49 5 9/25/1997 Soil-P 41 9 103 25.94Yes B-84 5 9/10/1997 Pismo 41 9 103 25.94Yes B-209 11 3/2/2001 Pismo 41 9 103 25.94Yes S-5-2.5 2.5 6/5/2003 Soil-P 41 9 103 25.94Yes SV-05-01 1 7/11/2007 Soil-O 41 9 103 25.94Yes SV-08-01 1 7/12/2007 Soil-P 41 9 103 25.94Yes SV-45-01 1 7/12/2007 Soil-P 41 9 103 25.94Yes SV-54-05 5 7/9/2007 Pismo 41 9 103 25.94

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Yes SV-61-05 5 7/10/2007 Soil-P 41 9 103 25.94Yes B-51 5 9/10/1997 Pismo 42 9 112 28.21Yes B-186-56 5 7/26/1999 Soil-P 42 9 112 28.21Yes S-39-2.5 2.5 6/5/2003 Soil-P 42 9 112 28.21Yes S-46-2.5 2.5 6/4/2003 Soil-P 42 9 112 28.21Yes S-27B-2.5 2.5 1/13/2004 Soil-O 42 9 112 28.21Yes BERM-5 0.5 9/21/1997 Tar/Soil-O 42 9 112 28.21Yes BERM-6 0.5 6/5/2003 Tar/Soil-P 42 9 112 28.21Yes SV-35-05 5 7/12/2007 Soil-O 42 9 112 28.21Yes WL-1-2 0 2/24/2005 Soil-O 42 9 112 28.21Yes B-34 5 9/25/1997 Soil-P 43 11 123 30.98Yes B-46 10 9/6/1997 Soil-P 43 11 123 30.98Yes B-136 10 9/18/1997 Pismo 43 11 123 30.98Yes B-138 30 9/5/1997 Obispo 43 11 123 30.98Yes B-140 5 9/23/1997 Soil-O 43 11 123 30.98Yes B-186-56 10 7/26/1999 Soil-P 43 11 123 30.98Yes B-191 10 7/27/1999 Obispo 43 11 123 30.98Yes S-9-2.5 2.5 6/5/2003 Soil-P 43 11 123 30.98Yes S-13-0.5 0.5 6/5/2003 Pismo 43 11 123 30.98Yes SV-55-01 1 7/10/2007 Soil-O 43 11 123 30.98Yes SV-63-01 1 7/9/2007 Soil-P 43 11 123 30.98Yes B-53 5 9/10/1997 Soil-P 44 8 131 33.00Yes B-174 5 7/21/1999 Pismo 44 8 131 33.00Yes SP-5 35 3/4/2001 Pismo 44 8 131 33.00Yes S-3-2.5 2.5 6/4/2003 Pismo 44 8 131 33.00Yes S-22-0.5 0.5 6/5/2003 Soil-P 44 8 131 33.00Yes S-45A-2.5 2.5 1/14/2004 Soil-O 44 8 131 33.00Yes SV-41-05 5 7/13/2007 Pismo 44 8 131 33.00Yes WL-3-1 0 2/24/2005 Soil-P 44 8 131 33.00Yes B-6 5 9/21/1997 Pismo 45 6 137 34.51Yes B-94 5 8/28/1997 Soil-P 45 6 137 34.51Yes S-15-2.5 2.5 6/4/2003 Soil-P 45 6 137 34.51Yes S-16-2.5 2.5 6/4/2003 Soil-P 45 6 137 34.51No OB-WBO-PC-2' 2 6/6/2003 Obispo 45 6 137 34.51Yes S-38A-01 1 7/17/2007 Soil-O 45 6 137 34.51Yes B-27 5 9/26/1997 Soil-O 46 7 144 36.27Yes B-30 10 9/7/1997 Soil-O 46 7 144 36.27Yes B-161 5 7/20/1999 Soil-P 46 7 144 36.27Yes B-163 50 11/20/1997 Pismo 46 7 144 36.27Yes S-18-0.5 0.5 6/5/2003 Soil-P 46 7 144 36.27Yes S-18-2.5 2.5 6/5/2003 Pismo 46 7 144 36.27Yes S-23-0.5 0.5 6/5/2003 Soil-P 46 7 144 36.27Yes B-183 5 7/23/1999 Soil-P 47 5 149 37.53Yes S-7-0.5 0.5 6/4/2003 Soil-P 47 5 149 37.53Yes S-40-0.5 0.5 6/5/2003 Pismo 47 5 149 37.53Yes S-45-2.5 2.5 6/4/2003 Soil-O 47 5 149 37.53Yes S-9A-2.5 2.5 1/14/2004 Soil-P 47 5 149 37.53Yes B-31 20 9/6/1997 Pismo 48 13 162 40.81Yes B-52 5 9/25/1997 Pismo 48 13 162 40.81Yes B-86 5 9/19/1997 Soil-P 48 13 162 40.81Yes B-122 5 8/27/1997 Af 48 13 162 40.81

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Yes B-141 5 9/26/1997 Pismo 48 13 162 40.81Yes S-4-2.5 2.5 6/4/2003 Pismo 48 13 162 40.81Yes S-24-0.5 0.5 6/5/2003 Soil-O 48 13 162 40.81Yes S-24-2.5 2.5 6/5/2003 Soil-O 48 13 162 40.81Yes S-30-2.5 2.5 6/4/2003 Pismo 48 13 162 40.81Yes S-11D-2.5 2.5 1/14/2004 Soil-O 48 13 162 40.81Yes SV-50-01 1 7/12/2007 Soil-P 48 13 162 40.81Yes SV-51-05 5 7/9/2007 Pismo 48 13 162 40.81Yes WL-5-2 0 2/24/2005 Soil-P 48 13 162 40.81Yes S-20-0.5 0.5 6/5/2003 Soil-P 49 2 164 41.31Yes S-27G-2.5 2.5 1/13/2004 Soil-P 49 2 164 41.31Yes B-12 5 9/24/1997 Soil-P 50 7 171 43.07Yes B-40 5 9/9/1997 Soil-P 50 7 171 43.07Yes S-24B-0.5 0.5 1/14/2004 Obispo 50 7 171 43.07Yes S-27C-0.5 0.5 1/14/2004 Soil-O 50 7 171 43.07Yes SV-58-02 2 7/10/2007 Soil-P 50 7 171 43.07Yes WL-2-2 0 2/24/2005 Soil-O 50 7 171 43.07Yes WL-3-2 0 2/24/2005 Soil-P 50 7 171 43.07Yes B-96 5 9/11/1997 Soil-P 51 7 178 44.84Yes B-184 5 7/22/1999 Soil-P 51 7 178 44.84Yes B-212 6 3/2/2001 Pismo 51 7 178 44.84Yes S-17-0.5 0.5 6/5/2003 Soil-P 51 7 178 44.84Yes S-33-0.5 0.5 6/4/2003 Soil-P 51 7 178 44.84Yes S-40A-03 3 7/16/2007 Pismo 51 7 178 44.84Yes S-40B-01 1 7/16/2007 Soil-P 51 7 178 44.84Yes B-89 60 9/4/1997 Pismo 52 9 187 47.10Yes B-176 5 7/20/1999 Pismo 52 9 187 47.10Yes S-24B-2.5 2.5 1/14/2004 Obispo 52 9 187 47.10Yes S-27E-0.5 0.5 1/13/2004 Soil-P 52 9 187 47.10Yes S-27E-2.5 2.5 1/13/2004 Soil-P 52 9 187 47.10Yes STR-14-1-0.5 0.5 4/26/2005 Tar/Soil-O 52 9 187 47.10Yes SV-41-01 1 7/13/2007 Soil-P 52 9 187 47.10Yes SV-52-05 5 7/9/2007 Pismo 52 9 187 47.10Yes SV-62-05 5 7/10/2007 Soil-P 52 9 187 47.10Yes SP-5 15 3/4/2001 Soil-P 53 6 193 48.61Yes S-11C-2.0 2 1/14/2004 Soil-O 53 6 193 48.61Yes GS-1-2.5 2.5 1/15/2004 Soil-P 53 6 193 48.61Yes GS-3-2 2 1/15/2004 Tar/Soil-P 53 6 193 48.61Yes SV-38-01 1 7/12/2007 Soil-P 53 6 193 48.61Yes SV-57-01 1 7/12/2007 Soil-P 53 6 193 48.61Yes B-159 5 7/20/1999 Soil-P 54 8 201 50.63Yes B-196 5 7/21/1999 Soil-P 54 8 201 50.63Yes S-16-0.5 0.5 6/4/2003 Soil-P 54 8 201 50.63Yes S-19-2.5 2.5 6/5/2003 Soil-P 54 8 201 50.63Yes S-9B-0.5 0.5 1/14/2004 Soil-P 54 8 201 50.63Yes S-9B-2.5 2.5 1/14/2004 Soil-P 54 8 201 50.63Yes S-11C-2.5 2.5 1/14/2004 Soil-O 54 8 201 50.63Yes WL-2-1 0 2/24/2005 Soil-O 54 8 201 50.63Yes B-117 5 8/29/1997 Soil-P 55 6 207 52.14Yes B-160 5 7/20/1999 Soil-P 55 6 207 52.14Yes S-8-2.5 2.5 6/4/2003 Soil-P 55 6 207 52.14

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Yes S-11B-2.5 2.5 1/14/2004 Soil-O 55 6 207 52.14Yes S-27G-0.5 0.5 1/13/2004 Soil-P 55 6 207 52.14Yes SV-52-01 1 7/9/2007 Soil-P 55 6 207 52.14Yes B-157 5 7/20/1999 Soil-P 56 7 214 53.90Yes B-210 6 3/1/2001 Pismo 56 7 214 53.90Yes S-17-2.5 2.5 6/5/2003 Soil-P 56 7 214 53.90Yes S-32-2.5 2.5 6/4/2003 Pismo 56 7 214 53.90Yes S-11D-0.5 0.5 1/14/2004 Soil-O 56 7 214 53.90Yes S-27C-2.5 2.5 1/14/2004 Soil-O 56 7 214 53.90Yes SV-36-01 1 7/10/2007 Soil-O 56 7 214 53.90Yes B-54 5 9/25/1997 Soil-P 57 5 219 55.16Yes B-211 6 3/2/2001 Pismo 57 5 219 55.16Yes S-39-0.5 0.5 6/5/2003 Soil-P 57 5 219 55.16Yes S-27F-2.5 2.5 1/13/2004 Soil-O 57 5 219 55.16Yes SV-01-01 1 7/11/2007 Soil-O 57 5 219 55.16Yes B-56 5 9/25/1997 Soil-P 58 4 223 56.17Yes B-202 15 5/29/2002 Soil-O 58 4 223 56.17Yes S-35-2.5 2.5 6/4/2003 Soil-P 58 4 223 56.17Yes S-27A-2.5 2.5 1/13/2004 Soil-O 58 4 223 56.17Yes B-81-90 5 9/26/1997 Soil-P 59 7 230 57.93Yes B-104 5 9/17/1997 Soil-P 59 7 230 57.93Yes B-116 5 8/27/1997 Soil-P 59 7 230 57.93Yes B-165 5 7/19/1999 Soil-P 59 7 230 57.93Yes S-36-2.5 2.5 6/4/2003 Pismo 59 7 230 57.93Yes SV-45-05 5 7/12/2007 Pismo 59 7 230 57.93Yes SV-58-05 5 7/10/2007 Soil-P 59 7 230 57.93Yes B-57-65 5 9/24/1997 Soil-P 60 4 234 58.94Yes S-36-0.5 0.5 6/4/2003 Pismo 60 4 234 58.94Yes S-11B-0.5 0.5 1/14/2004 Soil-O 60 4 234 58.94Yes GS-5-2.5 2.5 1/15/2004 Soil-P 60 4 234 58.94Yes S-6-0.5 0.5 6/5/2003 Soil-P 61 5 239 60.20Yes S-11-0.5 0.5 6/5/2003 Soil-O 61 5 239 60.20Yes S-12-0.5 0.5 6/5/2003 Pismo 61 5 239 60.20Yes S-28-0.5 0.5 6/5/2003 Soil-O 61 5 239 60.20Yes S-9A-0.5 0.5 1/14/2004 Soil-P 61 5 239 60.20Yes S-46-0.5 0.5 6/4/2003 Soil-P 62 2 241 60.71Yes GS-3-5 5 1/15/2004 Soil-P 62 2 241 60.71Yes S-45-0.5 0.5 6/4/2003 Soil-O 63 4 245 61.71Yes GS-4-6 6 1/15/2004 Soil-P 63 4 245 61.71Yes S-49-10 10 7/10/2007 Obispo 63 4 245 61.71Yes SV-63-05 5 7/9/2007 Soil-P 63 4 245 61.71Yes S-35-0.5 0.5 6/4/2003 Soil-P 64 5 250 62.97Yes S-38-2.5 2.5 6/5/2003 Soil-O 64 5 250 62.97Yes S-11C-0.5 0.5 1/14/2004 Soil-O 64 5 250 62.97Yes SV-04-05 5 7/11/2007 Qcol 64 5 250 62.97Yes SV-51-01 1 7/9/2007 Soil-P 64 5 250 62.97Yes S-20-2.5 2.5 6/5/2003 Soil-P 65 8 258 64.99Yes S-22-2.5 2.5 6/5/2003 Soil-P 65 8 258 64.99Yes S-34-0.5 0.5 6/4/2003 Soil-O 65 8 258 64.99Yes S-42-2.5 2.5 6/4/2003 Soil-O 65 8 258 64.99Yes S-9D-2.5 2.5 1/14/2004 Soil-P 65 8 258 64.99

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Yes S-27A-0.5 0.5 1/13/2004 Soil-O 65 8 258 64.99Yes GS-1-4 4 1/15/2004 Pismo 65 8 258 64.99Yes S-47-01 1 7/11/2007 Soil-O 65 8 258 64.99Yes B-168 5 7/19/1999 Soil-P 66 8 266 67.00Yes S-6-2.5 2.5 6/5/2003 Pismo 66 8 266 67.00Yes S-11-2.5 2.5 6/5/2003 Soil-O 66 8 266 67.00Yes S-29-2.5 2.5 6/5/2003 Soil-O 66 8 266 67.00Yes S-31-2.5 2.5 6/4/2003 Soil-P 66 8 266 67.00Yes S-34-2.5 2.5 6/4/2003 Soil-O 66 8 266 67.00No OB-WBP-FSL-3' 3 6/6/2003 Pismo 66 8 266 67.00Yes S-47-05 5 7/11/2007 Soil-O 66 8 266 67.00Yes B-138 20 9/5/1997 Pismo 67 4 270 68.01Yes S-1-2.5 2.5 6/4/2003 Af 67 4 270 68.01Yes S-11A-0.5 0.5 1/14/2004 Soil-O 67 4 270 68.01Yes S-50-05 5 7/11/2007 Soil-O 67 4 270 68.01Yes B-179 5 7/21/1999 Soil-P 68 4 274 69.02Yes S-7-2.5 2.5 6/4/2003 Soil-P 68 4 274 69.02Yes S-12-2.5 2.5 6/5/2003 Pismo 68 4 274 69.02Yes SV-61-01 1 7/10/2007 Soil-P 68 4 274 69.02Yes B-197 180 7/22/1999 Obispo 69 4 278 70.03Yes S-5-0.5 0.5 6/5/2003 Soil-P 69 4 278 70.03Yes S-27D-0.5 0.5 1/14/2004 Soil-O 69 4 278 70.03Yes S-40A-01 1 7/16/2007 Soil-P 69 4 278 70.03Yes S-2-2.5 2.5 6/4/2003 Soil-P 70 1 279 70.28Yes B-47 5 9/25/1997 Soil-P 71 6 285 71.79Yes B-80 5 9/25/1997 Soil-P 71 6 285 71.79Yes B-211 20 3/2/2001 Pismo 71 6 285 71.79Yes S-14-2.5 2.5 6/5/2003 Soil-P 71 6 285 71.79Yes S-15-0.5 0.5 6/4/2003 Soil-P 71 6 285 71.79Yes S-49-05 5 7/10/2007 Obispo 71 6 285 71.79Yes B-50 5 9/25/1997 Pismo 72 4 289 72.80Yes S-9-0.5 0.5 6/5/2003 Soil-P 72 4 289 72.80Yes S-10-0.5 0.5 6/4/2003 Soil-P 72 4 289 72.80Yes GS-3-6 6 1/15/2004 Soil-P 72 4 289 72.80Yes S-9C-2.5 2.5 1/14/2004 Soil-P 73 2 291 73.30Yes WL-4-1 0 2/24/2005 Soil-P 73 2 291 73.30Yes B-89 10 9/4/1997 Soil-P 74 2 293 73.80Yes SV-37-01 1 7/12/2007 Soil-O 74 2 293 73.80Yes B-16 1 9/24/1997 Soil-P 75 5 298 75.06Yes S-50-01 1 7/11/2007 Soil-O 75 5 298 75.06Yes SV-05-10 10 7/11/2007 Obispo 75 5 298 75.06Yes SV-50-05 5 7/12/2007 Pismo 75 5 298 75.06Yes WL-4-2 0 2/24/2005 Soil-P 75 5 298 75.06Yes S-9C-0.5 0.5 1/14/2004 Soil-P 76 2 300 75.57Yes SV-37-05 5 7/12/2007 Soil-O 76 2 300 75.57Yes B-163 5 11/20/1997 Soil-P 77 3 303 76.32Yes S-14-0.5 0.5 6/5/2003 Soil-O 77 3 303 76.32Yes S-30-0.5 0.5 6/4/2003 Pismo 77 3 303 76.32Yes B-65 10 9/22/1997 Soil-P 78 4 307 77.33Yes S-19-0.5 0.5 6/5/2003 Soil-P 78 4 307 77.33Yes S-24C-2.5 2.5 1/14/2004 Soil-O 78 4 307 77.33

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Yes S-1C-01 1 7/16/2007 Af 78 4 307 77.33Yes S-24C-0.5 0.5 1/14/2004 Soil-O 79 2 309 77.83Yes S-1A-01 1 7/16/2007 Af 79 2 309 77.83Yes S-1A-03 3 7/16/2007 Af 80 2 311 78.34Yes SV-53-01 1 7/9/2007 Soil-P 80 2 311 78.34Yes S-2-0.5 0.5 6/4/2003 Soil-P 81 4 315 79.35Yes S-8-0.5 0.5 6/4/2003 Soil-P 81 4 315 79.35No OB-SO-PC-0.5' 0.5 6/6/2003 Soil-O 81 4 315 79.35Yes S-47-10 10 7/11/2007 Obispo 81 4 315 79.35Yes S-1-0.5 0.5 6/4/2003 Af 82 1 316 79.60Yes B-136 1 9/18/1997 Soil-P 83 3 319 80.35Yes B-146 5 11/24/1997 Soil-P 83 3 319 80.35Yes B-149 5 11/25/1997 Soil-P 83 3 319 80.35Yes STR-4-2-1.5 1.5 4/26/2005 Soil-O 85 2 321 80.86Yes SV-04-01 1 7/11/2007 Qcol 85 2 321 80.86Yes STR-1-1-1.0 1 4/26/2005 Tar/Soil-O 87 2 323 81.36Yes SV-60-01 1 7/10/2007 Soil-P 87 2 323 81.36Yes S-41-2.5 2.5 6/4/2003 Soil-O 90 2 325 81.86Yes SV-32-05 5 7/13/2007 Soil-O 90 2 325 81.86No Pirates Cove #2 0 7/28/1999 Obispo 91 3 328 82.62Yes S-42-0.5 0.5 6/4/2003 Soil-O 91 3 328 82.62Yes SV-02-05 5 7/11/2007 Qal 91 3 328 82.62Yes SV-32-01 1 7/13/2007 Soil-O 92 1 329 82.87Yes B-14 1 9/24/1997 Soil-P 93 2 331 83.38Yes SV-62-01 1 7/10/2007 Soil-P 93 2 331 83.38No OB-WBP-FSA-0.5 0.5 6/6/2003 Pismo 94 1 332 83.63Yes S-49-01 1 7/10/2007 Soil-O 95 1 333 83.88Yes S-21-0.5 0.5 6/5/2003 Soil-P 96 2 335 84.38Yes WL-1-1 0 2/24/2005 Soil-O 96 2 335 84.38Yes STR-10-1-0.5 0.5 4/26/2005 Tar/Soil-P 97 2 337 84.89Yes SV-03-10 10 7/11/2007 Qal 97 2 337 84.89Yes B-36 5 9/23/1997 Obispo 98 1 338 85.14Yes S-9D-0.5 0.5 1/14/2004 Soil-P 99 2 340 85.64Yes SV-53-05 5 7/9/2007 Pismo 99 2 340 85.64No OB-SP-FSA-0.5 0.5 6/6/2003 Soil-P 100 4 344 86.65No OB-SP-FSL-0.5 0.5 6/6/2003 Soil-P 100 4 344 86.65Yes S-1C-04 4 7/16/2007 Af 100 4 344 86.65Yes STR-11-1-0.5 0.5 4/26/2005 Tar/Soil-O 100 4 344 86.65No OB-SP-FSL-2' 2 6/6/2003 Soil-P 110 5 349 87.91Yes GS-4-2.5 2.5 1/15/2004 Tar/Soil 110 5 349 87.91Yes STR-1-2-1.0 1 4/26/2005 Tar/Soil-O 110 5 349 87.91Yes SV-35-01 1 7/12/2007 Soil-O 110 5 349 87.91Yes SV-36-05 5 7/10/2007 Soil-O 110 5 349 87.91Yes S-25-2.5 2.5 6/5/2003 Soil-P 120 5 354 89.17Yes S-43-2.5 2.5 6/4/2003 Soil-O 120 5 354 89.17Yes S-44-2.5 2.5 6/4/2003 Soil-P 120 5 354 89.17Yes S-38B-01 1 7/17/2007 Soil-O 120 5 354 89.17Yes SV-03-05 5 7/11/2007 Qal 120 5 354 89.17No GMW-16 25 4/23/1997 Obispo 130 6 360 90.68Yes S-27-0.5 0.5 6/5/2003 Soil-O 130 6 360 90.68Yes S-37-2.5 2.5 6/4/2003 Soil-O 130 6 360 90.68

Page 7 of 24





Yes S-44-0.5 0.5 6/4/2003 Soil-P 130 6 360 90.68Yes STR-5-1-0.5 0.5 4/25/2005 Tar/Soil-O 130 6 360 90.68Yes SV-06-01 1 7/12/2007 Soil-O 130 6 360 90.68Yes S-38-0.5 0.5 6/5/2003 Soil-O 140 5 365 91.94Yes S-41-0.5 0.5 6/4/2003 Soil-O 140 5 365 91.94Yes GS-5-2 2 1/15/2004 Tar/Soil 140 5 365 91.94Yes SV-02-10 10 7/11/2007 Qal 140 5 365 91.94Yes SV-04-10 10 7/11/2007 Qcol 140 5 365 91.94Yes GS-2-1 1 1/15/2004 Tar/Soil-P 150 2 367 92.44Yes SV-02-01 1 7/11/2007 Qal 150 2 367 92.44Yes S-28-2.5 2.5 6/5/2003 Soil-O 160 5 372 93.70Yes S-43-0.5 0.5 6/4/2003 Soil-O 160 5 372 93.70No OB-SO-CS-0.5 0.5 6/6/2003 Soil-O 160 5 372 93.70Yes STR-9-1-0.5 0.5 4/26/2005 Tar/Soil-P 160 5 372 93.70Yes SV-06-05 5 7/12/2007 Obispo 160 5 372 93.70Yes B-173 55 11/18/1997 Obispo 170 3 375 94.46Yes STR-7-1-0.5 0.5 4/25/2005 Tar/Soil-O 170 3 375 94.46Yes SV-03-01 1 7/11/2007 Qal 170 3 375 94.46Yes B-130 5 8/25/1997 Pismo 180 2 377 94.96Yes S-37-0.5 0.5 6/4/2003 Soil-O 180 2 377 94.96No OB-WBO-RR-0.5 0.5 6/6/2003 Obispo 190 1 378 95.21Yes S-1B-01 1 7/16/2007 Af 210 2 380 95.72Yes S-1B-04 4 7/16/2007 Af 210 2 380 95.72No OB-WBO-CS-2' 2 6/6/2003 Obispo 220 1 381 95.97Yes S-38B-03 3 7/17/2007 Soil-O 230 2 383 96.47Yes SV-56-05 5 7/10/2007 Obispo 230 2 383 96.47Yes B-167-95 50 11/21/1997 Obispo 270 2 385 96.98Yes SV-56-01 1 7/10/2007 Soil-O 270 2 385 96.98Yes B-216 5 4/2/2003 Soil 310 1 386 97.23Yes S-38A-03 3 7/17/2007 Soil-O 340 2 388 97.73Yes STR-4-1-1.0 1 4/26/2005 Tar/Soil-O 340 2 388 97.73Yes STR-13-1-0.5 0.5 4/26/2005 Tar/Soil-O 400 1 389 97.98Yes B-158 1 7/21/1999 Soil-P 500 2 391 98.49No Pirates Cove #1 0 7/28/1999 Obispo 500 2 391 98.49Yes S-29-0.5 0.5 6/5/2003 Soil-O 540 1 392 98.74Yes STR-6-1-0.5 0.5 4/26/2005 Tar/Soil-O 560 1 393 98.99No OB-SO-RR-0.5 0.5 6/6/2003 Soil-O 750 1 394 99.24Yes GS-1-0 0 1/15/2004 Tar/Soil-P 900 1 395 99.50Yes STR-8-1-0.5 0.5 4/26/2005 Tar/Soil-P 970 1 396 99.75

Page 8 of 24

Table A-2All Samples Tested for MolybdenumAvila Tank Farm, Avila Beach, California

(Concentrations in mg/kg)


Geologic Unit Mo Mo - 1/2

Det. Abs. Freq. Cum. Freq. Probability

Yes B-12 5 09/24/97 Soil-P <1 0.5 229 229 57.68Yes B-14 1 09/24/97 Soil-P <1 0.5 229 229 57.68Yes B-16 1 09/24/97 Soil-P <1 0.5 229 229 57.68Yes B-18 5 09/26/97 Soil-P <1 0.5 229 229 57.68Yes B-19 5 09/25/97 Soil-P <1 0.5 229 229 57.68Yes B-27 5 09/26/97 Soil-O <1 0.5 229 229 57.68Yes B-30 10 09/07/97 Soil-O <1 0.5 229 229 57.68Yes B-31 20 09/06/97 Pismo <1 0.5 229 229 57.68Yes B-34 5 09/25/97 Soil-P <1 0.5 229 229 57.68Yes B-46 10 09/06/97 Soil-P <1 0.5 229 229 57.68Yes B-47 5 09/25/97 Soil-P <1 0.5 229 229 57.68Yes B-48 5 09/25/97 Soil-P <1 0.5 229 229 57.68Yes B-49 5 09/25/97 Soil-P <1 0.5 229 229 57.68Yes B-51 5 09/10/97 Pismo <1 0.5 229 229 57.68Yes B-52 5 09/25/97 Pismo <1 0.5 229 229 57.68Yes B-56 5 09/25/97 Soil-P <1 0.5 229 229 57.68Yes B-67 5 09/04/97 Pismo <1 0.5 229 229 57.68Yes B-73 1 09/03/97 Pismo <1 0.5 229 229 57.68Yes B-80 5 09/25/97 Soil-P <1 0.5 229 229 57.68Yes B-81-90 5 09/26/97 Soil-P <1 0.5 229 229 57.68Yes B-86 5 09/19/97 Soil-P <1 0.5 229 229 57.68Yes B-89 10 09/04/97 Soil-P <1 0.5 229 229 57.68Yes B-89 60 09/04/97 Pismo <1 0.5 229 229 57.68Yes B-95 5 09/18/97 Soil-P <1 0.5 229 229 57.68Yes B-96 5 09/11/97 Soil-P <1 0.5 229 229 57.68Yes B-114 5 08/27/97 Pismo <1 0.5 229 229 57.68Yes B-116 5 08/27/97 Soil-P <1 0.5 229 229 57.68Yes B-117 5 08/29/97 Soil-P <1 0.5 229 229 57.68Yes B-117 25 08/29/97 Pismo <1 0.5 229 229 57.68Yes B-119 5 09/02/97 Pismo <1 0.5 229 229 57.68Yes B-122 5 08/27/97 Af <1 0.5 229 229 57.68Yes B-130 5 08/25/97 Pismo <1 0.5 229 229 57.68Yes B-136 1 09/18/97 Soil-P <1 0.5 229 229 57.68Yes B-136 10 09/18/97 Pismo <1 0.5 229 229 57.68Yes B-138 30 09/05/97 Obispo <1 0.5 229 229 57.68Yes B-141 5 09/26/97 Pismo <1 0.5 229 229 57.68Yes B-146 5 11/24/97 Soil-P <1 0.5 229 229 57.68Yes B-153 110 11/26/97 Pismo <1 0.5 229 229 57.68Yes B-157 5 07/20/99 Soil-P <1 0.5 229 229 57.68Yes B-161 5 07/20/99 Soil-P <1 0.5 229 229 57.68Yes B-163 5 11/20/97 Soil-P <1 0.5 229 229 57.68Yes B-171 15 11/24/97 Soil-P <1 0.5 229 229 57.68Yes B-173 55 11/18/97 Obispo <1 0.5 229 229 57.68Yes B-174 5 07/21/99 Pismo <1 0.5 229 229 57.68Yes B-183 5 07/23/99 Soil-P <1 0.5 229 229 57.68Yes B-184 5 07/22/99 Soil-P <1 0.5 229 229 57.68Yes B-186-56 10 07/26/99 Soil-P <1 0.5 229 229 57.68Yes B-196 5 07/21/99 Soil-P <1 0.5 229 229 57.68Yes B-197 130 07/22/99 Pismo <1 0.5 229 229 57.68Yes B-197 180 07/22/99 Obispo <1 0.5 229 229 57.68Yes B-203 11 02/26/01 Soil-P <1 0.5 229 229 57.68Yes B-203 50 02/26/01 Pismo <1 0.5 229 229 57.68

Page 9 of 24






Yes B-209 11 03/02/01 Pismo <1 0.5 229 229 57.68Yes B-209 21 03/02/01 Pismo <1 0.5 229 229 57.68Yes B-210 10 03/01/01 Pismo <1 0.5 229 229 57.68Yes B-210 21 03/01/01 Pismo <1 0.5 229 229 57.68Yes B-211 6 03/02/01 Pismo <1 0.5 229 229 57.68Yes B-211 11 03/02/01 Pismo <1 0.5 229 229 57.68Yes B-211 20 03/02/01 Pismo <1 0.5 229 229 57.68Yes B-212 11 03/02/01 Pismo <1 0.5 229 229 57.68Yes B-215 5 05/29/02 Pismo <1 0.5 229 229 57.68Yes B-216 5 04/02/03 Soil <1 0.5 229 229 57.68Yes B-216 15 04/02/03 Soil <1 0.5 229 229 57.68Yes B-216 25 04/02/03 Soil <1 0.5 229 229 57.68Yes B-217 5 04/02/03 Soil-O <1 0.5 229 229 57.68Yes B-217 45 04/02/03 Obispo <1 0.5 229 229 57.68Yes SP-5 35 03/04/01 Pismo <1 0.5 229 229 57.68Yes S-1-0.5 0.5 06/04/03 Af <1 0.5 229 229 57.68Yes S-1-2.5 2.5 06/04/03 Af <1 0.5 229 229 57.68Yes S-2-0.5 0.5 06/04/03 Soil-P <1 0.5 229 229 57.68Yes S-2-2.5 2.5 06/04/03 Soil-P <1 0.5 229 229 57.68Yes S-3-0.5 0.5 06/04/03 Pismo <1 0.5 229 229 57.68Yes S-3-2.5 2.5 06/04/03 Pismo <1 0.5 229 229 57.68Yes S-4-2.5 2.5 06/04/03 Pismo <1 0.5 229 229 57.68Yes S-5-0.5 0.5 06/05/03 Soil-P <1 0.5 229 229 57.68Yes S-5-2.5 2.5 06/05/03 Soil-P <1 0.5 229 229 57.68Yes S-6-0.5 0.5 06/05/03 Soil-P <1 0.5 229 229 57.68Yes S-6-2.5 2.5 06/05/03 Pismo <1 0.5 229 229 57.68Yes S-7-0.5 0.5 06/04/03 Soil-P <1 0.5 229 229 57.68Yes S-7-2.5 2.5 06/04/03 Soil-P <1 0.5 229 229 57.68Yes S-8-2.5 2.5 06/04/03 Soil-P <1 0.5 229 229 57.68Yes S-9-2.5 2.5 06/05/03 Soil-P <1 0.5 229 229 57.68Yes S-10-0.5 0.5 06/04/03 Soil-P <1 0.5 229 229 57.68Yes S-10-2.5 2.5 06/04/03 Pismo <1 0.5 229 229 57.68Yes S-11-0.5 0.5 06/05/03 Soil-O <1 0.5 229 229 57.68Yes S-11-2.5 2.5 06/05/03 Soil-O <1 0.5 229 229 57.68Yes S-12-0.5 0.5 06/05/03 Pismo <1 0.5 229 229 57.68Yes S-12-2.5 2.5 06/05/03 Pismo <1 0.5 229 229 57.68Yes S-13-0.5 0.5 06/05/03 Pismo <1 0.5 229 229 57.68Yes S-13-2.5 2.5 06/05/03 Pismo <1 0.5 229 229 57.68Yes S-14-0.5 0.5 06/05/03 Soil-O <1 0.5 229 229 57.68Yes S-14-2.5 2.5 06/05/03 Soil-P <1 0.5 229 229 57.68Yes S-15-0.5 0.5 06/04/03 Soil-P <1 0.5 229 229 57.68Yes S-15-2.5 2.5 06/04/03 Soil-P <1 0.5 229 229 57.68Yes S-16-0.5 0.5 06/04/03 Soil-P <1 0.5 229 229 57.68Yes S-16-2.5 2.5 06/04/03 Soil-P <1 0.5 229 229 57.68Yes S-17-0.5 0.5 06/05/03 Soil-P <1 0.5 229 229 57.68Yes S-17-2.5 2.5 06/05/03 Soil-P <1 0.5 229 229 57.68Yes S-19-0.5 0.5 06/05/03 Soil-P <1 0.5 229 229 57.68Yes S-19-2.5 2.5 06/05/03 Soil-P <1 0.5 229 229 57.68Yes S-20-0.5 0.5 06/05/03 Soil-P <1 0.5 229 229 57.68Yes S-20-2.5 2.5 06/05/03 Soil-P <1 0.5 229 229 57.68Yes S-21-0.5 0.5 06/05/03 Soil-P <1 0.5 229 229 57.68Yes S-21-2.5 2.5 06/05/03 Pismo <1 0.5 229 229 57.68

Page 10 of 24






Yes S-22-0.5 0.5 06/05/03 Soil-P <1 0.5 229 229 57.68Yes S-22-2.5 2.5 06/05/03 Soil-P <1 0.5 229 229 57.68Yes S-23-0.5 0.5 06/05/03 Soil-P <1 0.5 229 229 57.68Yes S-23-2.5 2.5 06/05/03 Pismo <1 0.5 229 229 57.68Yes S-24-0.5 0.5 06/05/03 Soil-O <1 0.5 229 229 57.68Yes S-24-2.5 2.5 06/05/03 Soil-O <1 0.5 229 229 57.68Yes S-25-0.5 0.5 06/05/03 Pismo <1 0.5 229 229 57.68Yes S-25-2.5 2.5 06/05/03 Soil-P <1 0.5 229 229 57.68Yes S-26-0.5 0.5 06/05/03 Soil-O <1 0.5 229 229 57.68Yes S-26-2.5 2.5 06/05/03 Soil-O <1 0.5 229 229 57.68Yes S-27-0.5 0.5 06/05/03 Soil-O <1 0.5 229 229 57.68Yes S-27-2.5 2.5 06/05/03 Soil-O <1 0.5 229 229 57.68Yes S-28-0.5 0.5 06/05/03 Soil-O <1 0.5 229 229 57.68Yes S-28-2.5 2.5 06/05/03 Soil-O <1 0.5 229 229 57.68Yes S-29-0.5 0.5 06/05/03 Soil-O <1 0.5 229 229 57.68Yes S-29-2.5 2.5 06/05/03 Soil-O <1 0.5 229 229 57.68Yes S-30-0.5 0.5 06/04/03 Pismo <1 0.5 229 229 57.68Yes S-30-2.5 2.5 06/04/03 Pismo <1 0.5 229 229 57.68Yes S-31-0.5 0.5 06/04/03 Soil-P <1 0.5 229 229 57.68Yes S-31-2.5 2.5 06/04/03 Soil-P <1 0.5 229 229 57.68Yes S-32-0.5 0.5 06/04/03 Soil-P <1 0.5 229 229 57.68Yes S-32-2.5 2.5 06/04/03 Pismo <1 0.5 229 229 57.68Yes S-33-0.5 0.5 06/04/03 Soil-P <1 0.5 229 229 57.68Yes S-33-2.5 2.5 06/04/03 Soil-P <1 0.5 229 229 57.68Yes S-34-0.5 0.5 06/04/03 Soil-O <1 0.5 229 229 57.68Yes S-34-2.5 2.5 06/04/03 Soil-O <1 0.5 229 229 57.68Yes S-35-0.5 0.5 06/04/03 Soil-P <1 0.5 229 229 57.68Yes S-35-2.5 2.5 06/04/03 Soil-P <1 0.5 229 229 57.68Yes S-36-2.5 2.5 06/04/03 Pismo <1 0.5 229 229 57.68Yes S-37-0.5 0.5 06/04/03 Soil-O <1 0.5 229 229 57.68Yes S-37-2.5 2.5 06/04/03 Soil-O <1 0.5 229 229 57.68Yes S-38-0.5 0.5 06/05/03 Soil-O <1 0.5 229 229 57.68Yes S-38-2.5 2.5 06/05/03 Soil-O <1 0.5 229 229 57.68Yes S-39-2.5 2.5 06/05/03 Soil-P <1 0.5 229 229 57.68Yes S-40-0.5 0.5 06/05/03 Pismo <1 0.5 229 229 57.68Yes S-40-2.5 2.5 06/05/03 Pismo <1 0.5 229 229 57.68Yes S-41-0.5 0.5 06/04/03 Soil-O <1 0.5 229 229 57.68Yes S-41-2.5 2.5 06/04/03 Soil-O <1 0.5 229 229 57.68Yes S-42-0.5 0.5 06/04/03 Soil-O <1 0.5 229 229 57.68Yes S-42-2.5 2.5 06/04/03 Soil-O <1 0.5 229 229 57.68Yes S-43-0.5 0.5 06/04/03 Soil-O <1 0.5 229 229 57.68Yes S-43-2.5 2.5 06/04/03 Soil-O <1 0.5 229 229 57.68Yes S-44-0.5 0.5 06/04/03 Soil-P <1 0.5 229 229 57.68Yes S-44-2.5 2.5 06/04/03 Soil-P <1 0.5 229 229 57.68Yes S-45-0.5 0.5 06/04/03 Soil-O <1 0.5 229 229 57.68Yes S-45-2.5 2.5 06/04/03 Soil-O <1 0.5 229 229 57.68Yes S-46-0.5 0.5 06/04/03 Soil-P <1 0.5 229 229 57.68Yes S-46-2.5 2.5 06/04/03 Soil-P <1 0.5 229 229 57.68Yes S-9A-0.5 0.5 01/14/04 Soil-P <1 0.5 229 229 57.68Yes S-9A-2.5 2.5 01/14/04 Soil-P <1 0.5 229 229 57.68Yes S-9B-0.5 0.5 01/14/04 Soil-P <1 0.5 229 229 57.68Yes S-9B-2.5 2.5 01/14/04 Soil-P <1 0.5 229 229 57.68

Page 11 of 24






Yes S-9C-0.5 0.5 01/14/04 Soil-P <1 0.5 229 229 57.68Yes S-9C-2.5 2.5 01/14/04 Soil-P <1 0.5 229 229 57.68Yes S-9D-2.5 2.5 01/14/04 Soil-P <1 0.5 229 229 57.68Yes S-11A-0.5 0.5 01/14/04 Soil-O <1 0.5 229 229 57.68Yes S-11A-2.5 2.5 01/14/04 Soil-O <1 0.5 229 229 57.68Yes S-11B-0.5 0.5 01/14/04 Soil-O <1 0.5 229 229 57.68Yes S-11B-2.5 2.5 01/14/04 Soil-O <1 0.5 229 229 57.68Yes S-11C-0.5 0.5 01/14/04 Soil-O <1 0.5 229 229 57.68Yes S-11C-2.0 2 01/14/04 Soil-O <1 0.5 229 229 57.68Yes S-11C-2.5 2.5 01/14/04 Soil-O <1 0.5 229 229 57.68Yes S-11D-0.5 0.5 01/14/04 Soil-O <1 0.5 229 229 57.68Yes S-11D-2.5 2.5 01/14/04 Soil-O <1 0.5 229 229 57.68Yes S-24A-0.5 0.5 01/14/04 Soil-O <1 0.5 229 229 57.68Yes S-24A-2.5 2.5 01/14/04 Soil-O <1 0.5 229 229 57.68Yes S-24B-0.5 0.5 01/14/04 Obispo <1 0.5 229 229 57.68Yes S-24B-2.5 2.5 01/14/04 Obispo <1 0.5 229 229 57.68Yes S-24C-0.5 0.5 01/14/04 Soil-O <1 0.5 229 229 57.68Yes S-24C-2.5 2.5 01/14/04 Soil-O <1 0.5 229 229 57.68Yes S-27A-0.5 0.5 01/13/04 Soil-O <1 0.5 229 229 57.68Yes S-27A-2.5 2.5 01/13/04 Soil-O <1 0.5 229 229 57.68Yes S-27B-0.5 0.5 01/13/04 Soil-O <1 0.5 229 229 57.68Yes S-27B-2.5 2.5 01/13/04 Soil-O <1 0.5 229 229 57.68Yes S-27C-0.5 0.5 01/14/04 Soil-O <1 0.5 229 229 57.68Yes S-27C-2.5 2.5 01/14/04 Soil-O <1 0.5 229 229 57.68Yes S-27D-0.5 0.5 01/14/04 Soil-O <1 0.5 229 229 57.68Yes S-27D-2.5 2.5 01/14/04 Soil-O <1 0.5 229 229 57.68Yes S-27E-0.5 0.5 01/13/04 Soil-P <1 0.5 229 229 57.68Yes S-27E-2.5 2.5 01/13/04 Soil-P <1 0.5 229 229 57.68Yes S-27F-0.5 0.5 01/13/04 Soil-O <1 0.5 229 229 57.68Yes S-27F-2.5 2.5 01/13/04 Soil-O <1 0.5 229 229 57.68Yes S-27G-0.5 0.5 01/13/04 Soil-P <1 0.5 229 229 57.68Yes S-27G-2.5 2.5 01/13/04 Soil-P <1 0.5 229 229 57.68Yes S-45A-0.5 0.5 01/14/04 Soil-O <1 0.5 229 229 57.68Yes S-45A-2.5 2.5 01/14/04 Soil-O <1 0.5 229 229 57.68Yes GS-1-2.5 2.5 01/15/04 Soil-P <1 0.5 229 229 57.68Yes GS-1-4 4 01/15/04 Pismo <1 0.5 229 229 57.68Yes GS-3-2 2 01/15/04 Tar/Soil-P <1 0.5 229 229 57.68Yes GS-3-5 5 01/15/04 Soil-P <1 0.5 229 229 57.68Yes GS-3-6 6 01/15/04 Soil-P <1 0.5 229 229 57.68Yes GS-4-6 6 01/15/04 Soil-P <1 0.5 229 229 57.68Yes GS-5-2.5 2.5 01/15/04 Soil-P <1 0.5 229 229 57.68Yes BERM-1 0.5 09/21/97 Tar/Soil-P <1.0 0.5 229 229 57.68Yes BERM-2 0.5 09/21/97 Tar/Soil-P <1.0 0.5 229 229 57.68Yes BERM-3 0.5 09/21/97 Tar/Soil-P <1.0 0.5 229 229 57.68Yes BERM-4 0.5 09/21/97 Tar/Soil-P <1.0 0.5 229 229 57.68Yes BERM-5 0.5 09/21/97 Tar/Soil-O <1.0 0.5 229 229 57.68Yes WL-1-1 0 2/24/2005 Soil-O <1 0.5 229 229 57.68Yes WL-1-2 0 2/24/2005 Soil-O <1 0.5 229 229 57.68Yes WL-2-1 0 2/24/2005 Soil-O <1 0.5 229 229 57.68Yes WL-2-2 0 2/24/2005 Soil-O <1 0.5 229 229 57.68Yes WL-3-1 0 2/24/2005 Soil-P <1 0.5 229 229 57.68Yes WL-3-2 0 2/24/2005 Soil-P <1 0.5 229 229 57.68

Page 12 of 24






Yes WL-4-1 0 2/24/2005 Soil-P <1 0.5 229 229 57.68Yes WL-5-1 0 2/24/2005 Soil-P <1 0.5 229 229 57.68Yes WL-5-2 0 2/24/2005 Soil-P <1 0.5 229 229 57.68Yes WL-6-1 0 2/24/2005 Soil-P <1 0.5 229 229 57.68Yes WL-6-2 0 2/24/2005 Soil-P <1 0.5 229 229 57.68No GMW-16 25 04/23/97 Obispo <1 0.5 229 229 57.68No GMW-16 45 04/23/97 Obispo <1 0.5 229 229 57.68No Avila Beach #1 0 07/28/99 Obispo <1 0.5 229 229 57.68No Avila Beach #2 0 07/28/99 Obispo <1 0.5 229 229 57.68No OB-SO-CS-0.5 0.5 06/06/03 Soil-O <1 0.5 229 229 57.68No OB-SO-PC-0.5' 0.5 06/06/03 Soil-O <1 0.5 229 229 57.68No OB-SO-RR-0.5 0.5 06/06/03 Soil-O <1 0.5 229 229 57.68No OB-SP-FH-0.5 0.5 06/06/03 Soil-P <1 0.5 229 229 57.68No OB-SP-FSA-0.5 0.5 06/06/03 Soil-P <1 0.5 229 229 57.68No OB-SP-FSL-2' 2 06/06/03 Soil-P <1 0.5 229 229 57.68No OB-WBO-CS-2' 2 06/06/03 Obispo <1 0.5 229 229 57.68No OB-WBO-PC-2' 2 06/06/03 Obispo <1 0.5 229 229 57.68No OB-WBO-RR-0.5 0.5 06/06/03 Obispo <1 0.5 229 229 57.68No OB-WBP-FH-0.5 0.5 06/06/03 Pismo <1 0.5 229 229 57.68No OB-WBP-FSA-0.5 0.5 06/06/03 Pismo <1 0.5 229 229 57.68No OB-WBP-FSL-3' 3 06/06/03 Pismo <1 0.5 229 229 57.68Yes B-194 50 07/19/99 Pismo 1 1 72 301 75.82Yes B-212 21 03/02/01 Pismo 1 1 72 301 75.82Yes S-18-0.5 0.5 06/05/03 Soil-P 1 1 72 301 75.82Yes S-1A-01 1 7/16/2007 Af <2 1 72 301 75.82Yes S-1A-03 3 7/16/2007 Af <2 1 72 301 75.82Yes S-1B-01 1 7/16/2007 Af <2 1 72 301 75.82Yes S-1B-04 4 7/16/2007 Af <2 1 72 301 75.82Yes S-1C-01 1 7/16/2007 Af <2 1 72 301 75.82Yes S-1C-04 4 7/16/2007 Af <2 1 72 301 75.82Yes S-38A-01 1 7/17/2007 Soil-O <2 1 72 301 75.82Yes S-38B-01 1 7/17/2007 Soil-O <2 1 72 301 75.82Yes S-40A-03 3 7/16/2007 Pismo <2 1 72 301 75.82Yes S-40B-01 1 7/16/2007 Soil-P <2 1 72 301 75.82Yes S-40B-03 3 7/16/2007 Pismo <2 1 72 301 75.82Yes S-47-01 1 7/11/2007 Soil-O <2 1 72 301 75.82Yes S-47-05 5 7/11/2007 Soil-O <2 1 72 301 75.82Yes S-48-01 1 7/10/2007 Soil-O <2 1 72 301 75.82Yes S-48-05 5 7/10/2007 Obispo <2 1 72 301 75.82Yes S-49-01 1 7/10/2007 Soil-O <2 1 72 301 75.82Yes S-49-05 5 7/10/2007 Obispo <2 1 72 301 75.82Yes SV-02-01 1 7/11/2007 Qal <2 1 72 301 75.82Yes SV-02-05 5 7/11/2007 Qal <2 1 72 301 75.82Yes SV-02-10 10 7/11/2007 Qal <2 1 72 301 75.82Yes SV-03-01 1 7/11/2007 Qal <2 1 72 301 75.82Yes SV-03-05 5 7/11/2007 Qal <2 1 72 301 75.82Yes SV-03-10 10 7/11/2007 Qal <2 1 72 301 75.82Yes SV-04-01 1 7/11/2007 Qcol <2 1 72 301 75.82Yes SV-04-05 5 7/11/2007 Qcol <2 1 72 301 75.82Yes SV-04-10 10 7/11/2007 Qcol <2 1 72 301 75.82Yes SV-05-01 1 7/11/2007 Soil-O <2 1 72 301 75.82Yes SV-05-10 10 7/11/2007 Obispo <2 1 72 301 75.82

Page 13 of 24






Yes SV-08-01 1 7/12/2007 Soil-P <2 1 72 301 75.82Yes SV-08-05 5 7/12/2007 Pismo <2 1 72 301 75.82Yes SV-32-01 1 7/13/2007 Soil-O <2 1 72 301 75.82Yes SV-32-05 5 7/13/2007 Soil-O <2 1 72 301 75.82Yes SV-35-01 1 7/12/2007 Soil-O <2 1 72 301 75.82Yes SV-35-05 5 7/12/2007 Soil-O <2 1 72 301 75.82Yes SV-36-01 1 7/10/2007 Soil-O <2 1 72 301 75.82Yes SV-36-05 5 7/10/2007 Soil-O <2 1 72 301 75.82Yes SV-37-01 1 7/12/2007 Soil-O <2 1 72 301 75.82Yes SV-37-05 5 7/12/2007 Soil-O <2 1 72 301 75.82Yes SV-38-01 1 7/12/2007 Soil-P <2 1 72 301 75.82Yes SV-38-05 5 7/12/2007 Obispo <2 1 72 301 75.82Yes SV-41-01 1 7/13/2007 Soil-P <2 1 72 301 75.82Yes SV-41-05 5 7/13/2007 Pismo <2 1 72 301 75.82Yes SV-45-01 1 7/12/2007 Soil-P <2 1 72 301 75.82Yes SV-50-01 1 7/12/2007 Soil-P <2 1 72 301 75.82Yes SV-50-05 5 7/12/2007 Pismo <2 1 72 301 75.82Yes SV-51-01 1 7/9/2007 Soil-P <2 1 72 301 75.82Yes SV-51-05 5 7/9/2007 Pismo <2 1 72 301 75.82Yes SV-52-01 1 7/9/2007 Soil-P <2 1 72 301 75.82Yes SV-52-05 5 7/9/2007 Pismo <2 1 72 301 75.82Yes SV-53-01 1 7/9/2007 Soil-P <2 1 72 301 75.82Yes SV-53-05 5 7/9/2007 Pismo <2 1 72 301 75.82Yes SV-54-02 2 7/9/2007 Soil-P <2 1 72 301 75.82Yes SV-54-05 5 7/9/2007 Pismo <2 1 72 301 75.82Yes SV-55-01 1 7/10/2007 Soil-O <2 1 72 301 75.82Yes SV-55-05 5 7/10/2007 Obispo <2 1 72 301 75.82Yes SV-55-10 10 7/10/2007 Obispo <2 1 72 301 75.82Yes SV-56-01 1 7/10/2007 Soil-O <2 1 72 301 75.82Yes SV-56-10 10 7/10/2007 Obispo <2 1 72 301 75.82Yes SV-57-01 1 7/12/2007 Soil-P <2 1 72 301 75.82Yes SV-57-05 5 7/12/2007 Pismo <2 1 72 301 75.82Yes SV-58-02 2 7/10/2007 Soil-P <2 1 72 301 75.82Yes SV-58-05 5 7/10/2007 Soil-P <2 1 72 301 75.82Yes SV-60-01 1 7/10/2007 Soil-P <2 1 72 301 75.82Yes SV-60-05 5 7/10/2007 Soil-P <2 1 72 301 75.82Yes SV-61-01 1 7/10/2007 Soil-P <2 1 72 301 75.82Yes SV-61-05 5 7/10/2007 Soil-P <2 1 72 301 75.82Yes SV-62-01 1 7/10/2007 Soil-P <2 1 72 301 75.82Yes SV-62-05 5 7/10/2007 Soil-P <2 1 72 301 75.82Yes SV-63-05 5 7/9/2007 Soil-P <2 1 72 301 75.82Yes B-53 5 09/10/97 Soil-P 1.1 1.1 4 305 76.83Yes B-140 5 09/23/97 Soil-O 1.1 1.1 4 305 76.83Yes B-159 5 07/20/99 Soil-P 1.1 1.1 4 305 76.83Yes B-179 5 07/21/99 Soil-P 1.1 1.1 4 305 76.83Yes B-152 125 11/25/97 Pismo 1.2 1.2 7 312 78.59Yes B-165 5 07/19/99 Soil-P 1.2 1.2 7 312 78.59Yes B-184 90 07/22/99 Pismo 1.2 1.2 7 312 78.59Yes B-198 10 02/26/01 Soil-P 1.2 1.2 7 312 78.59Yes STR-14-1-0.5 0.5 4/26/2005 Tar/Soil-O 1.2 1.2 7 312 78.59Yes WL-4-2 0 2/24/2005 Soil-P 1.2 1.2 7 312 78.59No Pirates Cove #1 0 07/28/99 Obispo 1.2 1.2 7 312 78.59

Page 14 of 24






Yes B-158 1 07/21/99 Soil-P 1.3 1.3 3 315 79.35Yes B-210 31 03/01/01 Pismo 1.3 1.3 3 315 79.35Yes S-36-0.5 0.5 06/04/03 Pismo 1.3 1.3 3 315 79.35Yes B-65 10 09/22/97 Soil-P 1.4 1.4 5 320 80.60Yes B-178 5 07/20/99 Pismo 1.4 1.4 5 320 80.60Yes B-191 10 07/27/99 Obispo 1.4 1.4 5 320 80.60Yes B-202 15 05/29/02 Soil-O 1.4 1.4 5 320 80.60No OB-SP-FSL-0.5 0.5 06/06/03 Soil-P 1.4 1.4 5 320 80.60Yes B-40 5 09/09/97 Soil-P 1.5 1.5 4 324 81.61Yes B-94 5 08/28/97 Soil-P 1.5 1.5 4 324 81.61Yes S-39-0.5 0.5 06/05/03 Soil-P 1.5 1.5 4 324 81.61Yes STR-4-2-1.5 1.5 4/26/2005 Soil-O <2.5 1.5 4 324 81.61Yes S-8-0.5 0.5 06/04/03 Soil-P 1.6 1.6 4 328 82.62Yes S-18-2.5 2.5 06/05/03 Pismo 1.6 1.6 4 328 82.62Yes S-9D-0.5 0.5 01/14/04 Soil-P 1.6 1.6 4 328 82.62Yes STR-10-1-0.5 0.5 4/26/2005 Tar/Soil-P 1.6 1.6 4 328 82.62Yes B-50 5 09/25/97 Pismo 1.7 1.7 4 332 83.63Yes B-104 5 09/17/97 Soil-P 1.7 1.7 4 332 83.63Yes B-210 6 03/01/01 Pismo 1.7 1.7 4 332 83.63Yes S-4-0.5 0.5 06/04/03 Soil-P 1.7 1.7 4 332 83.63Yes B-54 5 09/25/97 Soil-P 1.8 1.8 4 336 84.63Yes B-84 5 09/10/97 Pismo 1.8 1.8 4 336 84.63Yes STR-1-1-1.0 1 4/26/2005 Tar/Soil-O 1.8 1.8 4 336 84.63Yes STR-9-1-0.5 0.5 4/26/2005 Tar/Soil-P 1.8 1.8 4 336 84.63Yes B-83 85 09/23/97 Pismo 1.9 1.9 4 340 85.64Yes B-168 5 07/19/99 Soil-P 1.9 1.9 4 340 85.64Yes B-198 30 02/26/01 Soil-P 1.9 1.9 4 340 85.64Yes SP-5 15 03/04/01 Soil-P 1.9 1.9 4 340 85.64Yes B-209 6 03/02/01 Pismo 2 2 7 347 87.41Yes S-38A-03 3 7/17/2007 Soil-O <4 2 7 347 87.41Yes S-38B-03 3 7/17/2007 Soil-O <4 2 7 347 87.41Yes S-47-10 10 7/11/2007 Obispo <4 2 7 347 87.41Yes SV-05-05 5 7/11/2007 Obispo <4 2 7 347 87.41Yes SV-06-10 10 7/12/2007 Obispo <4 2 7 347 87.41Yes SV-32-10 10 7/13/2007 Obispo <4 2 7 347 87.41Yes B-186-56 5 07/26/99 Soil-P 2.2 2.2 4 351 88.41Yes B-210 15 03/01/01 Pismo 2.2 2.2 4 351 88.41Yes BERM-6 0.5 06/05/03 Tar/Soil-P 2.2 2.2 4 351 88.41No Pirates Cove #2 0 07/28/99 Obispo 2.2 2.2 4 351 88.41Yes B-153 75 11/26/97 Pismo 2.3 2.3 2 353 88.92Yes B-163 50 11/20/97 Pismo 2.3 2.3 2 353 88.92Yes SP-5 55 03/04/01 Obispo 2.5 2.5 3 356 89.67Yes STR-4-1-1.0 1 4/26/2005 Tar/Soil-O 2.5 2.5 3 356 89.67Yes SV-45-05 5 7/12/2007 Pismo 2.5 2.5 3 356 89.67Yes STR-11-1-0.5 0.5 4/26/2005 Tar/Soil-O 2.6 2.6 1 357 89.92Yes B-175 5 07/19/99 Pismo 2.7 2.7 1 358 90.18Yes B-176 5 07/20/99 Pismo 2.8 2.8 1 359 90.43Yes S-49-10 10 7/10/2007 Obispo 2.9 2.9 1 360 90.68Yes S-40A-01 1 7/16/2007 Soil-P 3 3 1 361 90.93Yes B-6 5 09/21/97 Pismo 3.1 3.1 4 365 91.94Yes B-85 5 09/19/97 Pismo 3.1 3.1 4 365 91.94Yes GS-4-2.5 2.5 01/15/04 Tar/Soil 3.1 3.1 4 365 91.94

Page 15 of 24






Yes SV-06-01 1 7/12/2007 Soil-O 3.1 3.1 4 365 91.94Yes SV-06-05 5 7/12/2007 Obispo 3.2 3.2 1 366 92.19Yes B-152 50 11/23/97 Pismo 3.6 3.6 2 368 92.70Yes SV-56-05 5 7/10/2007 Obispo 3.6 3.6 2 368 92.70Yes B-36 5 09/23/97 Obispo 3.7 3.7 4 372 93.70Yes B-149 5 11/25/97 Soil-P 3.7 3.7 4 372 93.70Yes B-212 6 03/02/01 Pismo 3.7 3.7 4 372 93.70Yes S-9-0.5 0.5 06/05/03 Soil-P 3.7 3.7 4 372 93.70Yes GS-5-2 2 01/15/04 Tar/Soil 3.8 3.8 1 373 93.95Yes B-131 25 08/26/97 Obispo 4.3 4.3 3 376 94.71Yes GS-2-1 1 01/15/04 Tar/Soil-P 4.3 4.3 3 376 94.71Yes S-50-01 1 7/11/2007 Soil-O 4.3 4.3 3 376 94.71Yes STR-7-1-0.5 0.5 4/25/2005 Tar/Soil-O 4.5 4.5 1 377 94.96Yes B-167-95 50 11/21/97 Obispo 4.6 4.6 1 378 95.21Yes B-138 20 09/05/97 Pismo 4.7 4.7 1 379 95.47Yes B-57-65 5 09/24/97 Soil-P 5.1 5.1 2 381 95.97Yes B-76 25 09/03/97 Obispo 5.1 5.1 2 381 95.97Yes STR-13-1-0.5 0.5 4/26/2005 Tar/Soil-O 5.4 5.4 1 382 96.22Yes S-48-10 10 7/10/2007 Obispo 5.7 5.7 1 383 96.47Yes GS-1-0 0 01/15/04 Tar/Soil-P 5.8 5.8 1 384 96.73Yes STR-8-1-0.5 0.5 4/26/2005 Tar/Soil-P 5.9 5.9 1 385 96.98Yes STR-1-2-1.0 1 4/26/2005 Tar/Soil-O <12 6 3 388 97.73Yes STR-5-1-0.5 0.5 4/25/2005 Tar/Soil-O <12 6 3 388 97.73Yes SV-63-01 1 7/9/2007 Soil-P 6 6 3 388 97.73Yes B-76 15 09/03/97 Obispo 6.5 6.5 1 389 97.98Yes S-50-10 10 7/11/2007 Obispo 7.5 7.5 1 390 98.24Yes B-160 5 07/20/99 Soil-P 7.8 7.8 1 391 98.49Yes SV-01-01 1 7/11/2007 Soil-O 8.6 8.6 1 392 98.74Yes S-50-05 5 7/11/2007 Soil-O 10 10 1 393 98.99Yes SV-01-05 5 7/11/2007 Obispo 11 11 1 394 99.24Yes SV-01-10 10 7/11/2007 Obispo 15 15 1 395 99.50Yes STR-6-1-0.5 0.5 4/26/2005 Tar/Soil-O 37 37 1 396 99.75

Note: Values in "Red" font are one-half the Practical Quantitation Limit.

Page 16 of 24

Table A-3All Samples Tested for Thallium



Geologic Unit Tl Tl - 1/2


Yes STR-11-1-0.5 0.5 4/26/2005 Tar/Soil-O 0.74 0.74 1 1 0.25Yes STR-4-2-1.5 1.5 4/26/2005 Soil-O 0.75 0.75 2 3 0.76Yes STR-1-1-1.0 1 4/26/2005 Tar/Soil-O 0.75 0.75 2 3 0.76Yes STR-10-1-0.5 0.5 4/26/2005 Tar/Soil-P 0.86 0.86 1 4 1.01Yes STR-13-1-0.5 0.5 4/26/2005 Tar/Soil-O 1.6 1.6 1 5 1.26Yes B-12 5 09/24/97 Soil-P <5 2.5 274 279 70.28Yes B-14 1 09/24/97 Soil-P <5 2.5 274 279 70.28Yes B-16 1 09/24/97 Soil-P <5 2.5 274 279 70.28Yes B-18 5 09/26/97 Soil-P <5 2.5 274 279 70.28Yes B-19 5 09/25/97 Soil-P <5 2.5 274 279 70.28Yes B-27 5 09/26/97 Soil-O <5 2.5 274 279 70.28Yes B-30 10 09/07/97 Soil-O <5 2.5 274 279 70.28Yes B-31 20 09/06/97 Pismo <5 2.5 274 279 70.28Yes B-34 5 09/25/97 Soil-P <5 2.5 274 279 70.28Yes B-46 10 09/06/97 Soil-P <5 2.5 274 279 70.28Yes B-47 5 09/25/97 Soil-P <5 2.5 274 279 70.28Yes B-48 5 09/25/97 Soil-P <5 2.5 274 279 70.28Yes B-49 5 09/25/97 Soil-P <5 2.5 274 279 70.28Yes B-51 5 09/10/97 Pismo <5 2.5 274 279 70.28Yes B-52 5 09/25/97 Pismo <5 2.5 274 279 70.28Yes B-56 5 09/25/97 Soil-P <5 2.5 274 279 70.28Yes B-67 5 09/04/97 Pismo <5 2.5 274 279 70.28Yes B-73 1 09/03/97 Pismo <5 2.5 274 279 70.28Yes B-80 5 09/25/97 Soil-P <5 2.5 274 279 70.28Yes B-81-90 5 09/26/97 Soil-P <5 2.5 274 279 70.28Yes B-86 5 09/19/97 Soil-P <5 2.5 274 279 70.28Yes B-89 10 09/04/97 Soil-P <5 2.5 274 279 70.28Yes B-89 60 09/04/97 Pismo <5 2.5 274 279 70.28Yes B-95 5 09/18/97 Soil-P <5 2.5 274 279 70.28Yes B-96 5 09/11/97 Soil-P <5 2.5 274 279 70.28Yes B-114 5 08/27/97 Pismo <5 2.5 274 279 70.28Yes B-116 5 08/27/97 Soil-P <5 2.5 274 279 70.28Yes B-117 5 08/29/97 Soil-P <5 2.5 274 279 70.28Yes B-117 25 08/29/97 Pismo <5 2.5 274 279 70.28Yes B-119 5 09/02/97 Pismo <5 2.5 274 279 70.28Yes B-122 5 08/27/97 Af <5 2.5 274 279 70.28Yes B-130 5 08/25/97 Pismo <5 2.5 274 279 70.28Yes B-136 1 09/18/97 Soil-P <5 2.5 274 279 70.28Yes B-136 10 09/18/97 Pismo <5 2.5 274 279 70.28Yes B-138 30 09/05/97 Obispo <5 2.5 274 279 70.28Yes B-141 5 09/26/97 Pismo <5 2.5 274 279 70.28Yes B-146 5 11/24/97 Soil-P <5 2.5 274 279 70.28Yes B-153 110 11/26/97 Pismo <5 2.5 274 279 70.28Yes B-157 5 07/20/99 Soil-P <5 2.5 274 279 70.28Yes B-161 5 07/20/99 Soil-P <5 2.5 274 279 70.28Yes B-163 5 11/20/97 Soil-P <5 2.5 274 279 70.28Yes B-171 15 11/24/97 Soil-P <5 2.5 274 279 70.28Yes B-173 55 11/18/97 Obispo <5 2.5 274 279 70.28Yes B-174 5 07/21/99 Pismo <5 2.5 274 279 70.28Yes B-183 5 07/23/99 Soil-P <5 2.5 274 279 70.28Yes B-184 5 07/22/99 Soil-P <5 2.5 274 279 70.28Yes B-186-56 10 07/26/99 Soil-P <5 2.5 274 279 70.28

Page 17 of 24






Yes B-196 5 07/21/99 Soil-P <5 2.5 274 279 70.28Yes B-197 130 07/22/99 Pismo <5 2.5 274 279 70.28Yes B-197 180 07/22/99 Obispo <5 2.5 274 279 70.28Yes B-203 11 02/26/01 Soil-P <5 2.5 274 279 70.28Yes B-203 50 02/26/01 Pismo <5 2.5 274 279 70.28Yes B-209 11 03/02/01 Pismo <5 2.5 274 279 70.28Yes B-209 21 03/02/01 Pismo <5 2.5 274 279 70.28Yes B-210 10 03/01/01 Pismo <5 2.5 274 279 70.28Yes B-210 21 03/01/01 Pismo <5 2.5 274 279 70.28Yes B-211 6 03/02/01 Pismo <5 2.5 274 279 70.28Yes B-211 11 03/02/01 Pismo <5 2.5 274 279 70.28Yes B-211 20 03/02/01 Pismo <5 2.5 274 279 70.28Yes B-212 11 03/02/01 Pismo <5 2.5 274 279 70.28Yes B-215 5 05/29/02 Pismo <5 2.5 274 279 70.28Yes B-216 5 04/02/03 Soil <5 2.5 274 279 70.28Yes B-216 15 04/02/03 Soil <5 2.5 274 279 70.28Yes B-216 25 04/02/03 Soil <5 2.5 274 279 70.28Yes B-217 5 04/02/03 Soil-O <5 2.5 274 279 70.28Yes B-217 45 04/02/03 Obispo <5 2.5 274 279 70.28Yes SP-5 35 03/04/01 Pismo <5 2.5 274 279 70.28Yes S-1-0.5 0.5 06/04/03 Af <5 2.5 274 279 70.28Yes S-1-2.5 2.5 06/04/03 Af <5 2.5 274 279 70.28Yes S-2-0.5 0.5 06/04/03 Soil-P <5 2.5 274 279 70.28Yes S-2-2.5 2.5 06/04/03 Soil-P <5 2.5 274 279 70.28Yes S-3-0.5 0.5 06/04/03 Pismo <5 2.5 274 279 70.28Yes S-3-2.5 2.5 06/04/03 Pismo <5 2.5 274 279 70.28Yes S-4-2.5 2.5 06/04/03 Pismo <5 2.5 274 279 70.28Yes S-5-0.5 0.5 06/05/03 Soil-P <5 2.5 274 279 70.28Yes S-5-2.5 2.5 06/05/03 Soil-P <5 2.5 274 279 70.28Yes S-6-0.5 0.5 06/05/03 Soil-P <5 2.5 274 279 70.28Yes S-6-2.5 2.5 06/05/03 Pismo <5 2.5 274 279 70.28Yes S-7-0.5 0.5 06/04/03 Soil-P <5 2.5 274 279 70.28Yes S-7-2.5 2.5 06/04/03 Soil-P <5 2.5 274 279 70.28Yes S-8-2.5 2.5 06/04/03 Soil-P <5 2.5 274 279 70.28Yes S-9-2.5 2.5 06/05/03 Soil-P <5 2.5 274 279 70.28Yes S-10-0.5 0.5 06/04/03 Soil-P <5 2.5 274 279 70.28Yes S-10-2.5 2.5 06/04/03 Pismo <5 2.5 274 279 70.28Yes S-12-0.5 0.5 06/05/03 Pismo <5 2.5 274 279 70.28Yes S-12-2.5 2.5 06/05/03 Pismo <5 2.5 274 279 70.28Yes S-13-0.5 0.5 06/05/03 Pismo <5 2.5 274 279 70.28Yes S-13-2.5 2.5 06/05/03 Pismo <5 2.5 274 279 70.28Yes S-15-0.5 0.5 06/04/03 Soil-P <5 2.5 274 279 70.28Yes S-15-2.5 2.5 06/04/03 Soil-P <5 2.5 274 279 70.28Yes S-17-0.5 0.5 06/05/03 Soil-P <5 2.5 274 279 70.28Yes S-17-2.5 2.5 06/05/03 Soil-P <5 2.5 274 279 70.28Yes S-19-0.5 0.5 06/05/03 Soil-P <5 2.5 274 279 70.28Yes S-19-2.5 2.5 06/05/03 Soil-P <5 2.5 274 279 70.28Yes S-20-0.5 0.5 06/05/03 Soil-P <5 2.5 274 279 70.28Yes S-20-2.5 2.5 06/05/03 Soil-P <5 2.5 274 279 70.28Yes S-21-0.5 0.5 06/05/03 Soil-P <5 2.5 274 279 70.28Yes S-21-2.5 2.5 06/05/03 Pismo <5 2.5 274 279 70.28Yes S-22-0.5 0.5 06/05/03 Soil-P <5 2.5 274 279 70.28

Page 18 of 24






Yes S-22-2.5 2.5 06/05/03 Soil-P <5 2.5 274 279 70.28Yes S-27-0.5 0.5 06/05/03 Soil-O <5 2.5 274 279 70.28Yes S-27-2.5 2.5 06/05/03 Soil-O <5 2.5 274 279 70.28Yes S-28-0.5 0.5 06/05/03 Soil-O <5 2.5 274 279 70.28Yes S-28-2.5 2.5 06/05/03 Soil-O <5 2.5 274 279 70.28Yes S-30-0.5 0.5 06/04/03 Pismo <5 2.5 274 279 70.28Yes S-30-2.5 2.5 06/04/03 Pismo <5 2.5 274 279 70.28Yes S-31-0.5 0.5 06/04/03 Soil-P <5 2.5 274 279 70.28Yes S-31-2.5 2.5 06/04/03 Soil-P <5 2.5 274 279 70.28Yes S-32-0.5 0.5 06/04/03 Soil-P <5 2.5 274 279 70.28Yes S-32-2.5 2.5 06/04/03 Pismo <5 2.5 274 279 70.28Yes S-33-0.5 0.5 06/04/03 Soil-P <5 2.5 274 279 70.28Yes S-33-2.5 2.5 06/04/03 Soil-P <5 2.5 274 279 70.28Yes S-34-0.5 0.5 06/04/03 Soil-O <5 2.5 274 279 70.28Yes S-34-2.5 2.5 06/04/03 Soil-O <5 2.5 274 279 70.28Yes S-35-0.5 0.5 06/04/03 Soil-P <5 2.5 274 279 70.28Yes S-35-2.5 2.5 06/04/03 Soil-P <5 2.5 274 279 70.28Yes S-36-2.5 2.5 06/04/03 Pismo <5 2.5 274 279 70.28Yes S-38-0.5 0.5 06/05/03 Soil-O <5 2.5 274 279 70.28Yes S-38-2.5 2.5 06/05/03 Soil-O <5 2.5 274 279 70.28Yes S-39-2.5 2.5 06/05/03 Soil-P <5 2.5 274 279 70.28Yes S-40-0.5 0.5 06/05/03 Pismo <5 2.5 274 279 70.28Yes S-40-2.5 2.5 06/05/03 Pismo <5 2.5 274 279 70.28Yes S-41-0.5 0.5 06/04/03 Soil-O <5 2.5 274 279 70.28Yes S-41-2.5 2.5 06/04/03 Soil-O <5 2.5 274 279 70.28Yes S-43-0.5 0.5 06/04/03 Soil-O <5 2.5 274 279 70.28Yes S-43-2.5 2.5 06/04/03 Soil-O <5 2.5 274 279 70.28Yes S-44-0.5 0.5 06/04/03 Soil-P <5 2.5 274 279 70.28Yes S-44-2.5 2.5 06/04/03 Soil-P <5 2.5 274 279 70.28Yes S-45-0.5 0.5 06/04/03 Soil-O <5 2.5 274 279 70.28Yes S-45-2.5 2.5 06/04/03 Soil-O <5 2.5 274 279 70.28Yes S-46-0.5 0.5 06/04/03 Soil-P <5 2.5 274 279 70.28Yes S-46-2.5 2.5 06/04/03 Soil-P <5 2.5 274 279 70.28Yes S-9A-0.5 0.5 01/14/04 Soil-P <5 2.5 274 279 70.28Yes S-9A-2.5 2.5 01/14/04 Soil-P <5 2.5 274 279 70.28Yes S-9B-0.5 0.5 01/14/04 Soil-P <5 2.5 274 279 70.28Yes S-9B-2.5 2.5 01/14/04 Soil-P <5 2.5 274 279 70.28Yes S-9C-0.5 0.5 01/14/04 Soil-P <5 2.5 274 279 70.28Yes S-9C-2.5 2.5 01/14/04 Soil-P <5 2.5 274 279 70.28Yes S-9D-2.5 2.5 01/14/04 Soil-P <5 2.5 274 279 70.28Yes S-11A-0.5 0.5 01/14/04 Soil-O <5 2.5 274 279 70.28Yes S-11A-2.5 2.5 01/14/04 Soil-O <5 2.5 274 279 70.28Yes S-11B-0.5 0.5 01/14/04 Soil-O <5 2.5 274 279 70.28Yes S-11B-2.5 2.5 01/14/04 Soil-O <5 2.5 274 279 70.28Yes S-11C-0.5 0.5 01/14/04 Soil-O <5 2.5 274 279 70.28Yes S-11C-2.0 2 01/14/04 Soil-O <5 2.5 274 279 70.28Yes S-11C-2.5 2.5 01/14/04 Soil-O <5 2.5 274 279 70.28Yes S-11D-0.5 0.5 01/14/04 Soil-O <5 2.5 274 279 70.28Yes S-11D-2.5 2.5 01/14/04 Soil-O <5 2.5 274 279 70.28Yes S-24A-0.5 0.5 01/14/04 Soil-O <5 2.5 274 279 70.28Yes S-24A-2.5 2.5 01/14/04 Soil-O <5 2.5 274 279 70.28Yes S-24B-0.5 0.5 01/14/04 Obispo <5 2.5 274 279 70.28

Page 19 of 24






Yes S-24B-2.5 2.5 01/14/04 Obispo <5 2.5 274 279 70.28Yes S-24C-0.5 0.5 01/14/04 Soil-O <5 2.5 274 279 70.28Yes S-24C-2.5 2.5 01/14/04 Soil-O <5 2.5 274 279 70.28Yes S-27A-0.5 0.5 01/13/04 Soil-O <5 2.5 274 279 70.28Yes S-27A-2.5 2.5 01/13/04 Soil-O <5 2.5 274 279 70.28Yes S-27B-0.5 0.5 01/13/04 Soil-O <5 2.5 274 279 70.28Yes S-27B-2.5 2.5 01/13/04 Soil-O <5 2.5 274 279 70.28Yes S-27C-0.5 0.5 01/14/04 Soil-O <5 2.5 274 279 70.28Yes S-27C-2.5 2.5 01/14/04 Soil-O <5 2.5 274 279 70.28Yes S-27D-0.5 0.5 01/14/04 Soil-O <5 2.5 274 279 70.28Yes S-27D-2.5 2.5 01/14/04 Soil-O <5 2.5 274 279 70.28Yes S-27E-0.5 0.5 01/13/04 Soil-P <5 2.5 274 279 70.28Yes S-27E-2.5 2.5 01/13/04 Soil-P <5 2.5 274 279 70.28Yes S-27F-0.5 0.5 01/13/04 Soil-O <5 2.5 274 279 70.28Yes S-27F-2.5 2.5 01/13/04 Soil-O <5 2.5 274 279 70.28Yes S-27G-0.5 0.5 01/13/04 Soil-P <5 2.5 274 279 70.28Yes S-27G-2.5 2.5 01/13/04 Soil-P <5 2.5 274 279 70.28Yes S-45A-0.5 0.5 01/14/04 Soil-O <5 2.5 274 279 70.28Yes S-45A-2.5 2.5 01/14/04 Soil-O <5 2.5 274 279 70.28Yes GS-1-2.5 2.5 01/15/04 Soil-P <5 2.5 274 279 70.28Yes GS-1-4 4 01/15/04 Pismo <5 2.5 274 279 70.28Yes GS-3-2 2 01/15/04 Tar/Soil-P <5 2.5 274 279 70.28Yes GS-3-5 5 01/15/04 Soil-P <5 2.5 274 279 70.28Yes GS-3-6 6 01/15/04 Soil-P <5 2.5 274 279 70.28Yes GS-4-6 6 01/15/04 Soil-P <5 2.5 274 279 70.28Yes GS-5-2.5 2.5 01/15/04 Soil-P <5 2.5 274 279 70.28Yes BERM-1 0.5 09/21/97 Tar/Soil-P <5 2.5 274 279 70.28Yes BERM-2 0.5 09/21/97 Tar/Soil-P <5 2.5 274 279 70.28Yes BERM-3 0.5 09/21/97 Tar/Soil-P <5 2.5 274 279 70.28Yes BERM-4 0.5 09/21/97 Tar/Soil-P <5 2.5 274 279 70.28Yes BERM-5 0.5 09/21/97 Tar/Soil-O <5 2.5 274 279 70.28Yes WL-1-1 0 2/24/2005 Soil-O <5 2.5 274 279 70.28Yes WL-1-2 0 2/24/2005 Soil-O <5 2.5 274 279 70.28Yes WL-2-1 0 2/24/2005 Soil-O <5 2.5 274 279 70.28Yes WL-2-2 0 2/24/2005 Soil-O <5 2.5 274 279 70.28Yes WL-3-1 0 2/24/2005 Soil-P <5 2.5 274 279 70.28Yes WL-3-2 0 2/24/2005 Soil-P <5 2.5 274 279 70.28Yes WL-4-1 0 2/24/2005 Soil-P <5 2.5 274 279 70.28Yes WL-5-1 0 2/24/2005 Soil-P <5 2.5 274 279 70.28Yes WL-5-2 0 2/24/2005 Soil-P <5 2.5 274 279 70.28Yes WL-6-1 0 2/24/2005 Soil-P <5 2.5 274 279 70.28Yes WL-6-2 0 2/24/2005 Soil-P <5 2.5 274 279 70.28No GMW-16 25 04/23/97 Obispo <5 2.5 274 279 70.28No GMW-16 45 04/23/97 Obispo <5 2.5 274 279 70.28No Avila Beach #1 0 07/28/99 Obispo <5 2.5 274 279 70.28No Avila Beach #2 0 07/28/99 Obispo <5 2.5 274 279 70.28No OB-SO-CS-0.5 0.5 06/06/03 Soil-O <5 2.5 274 279 70.28No OB-SO-PC-0.5' 0.5 06/06/03 Soil-O <5 2.5 274 279 70.28No OB-SO-RR-0.5 0.5 06/06/03 Soil-O <5 2.5 274 279 70.28No OB-SP-FH-0.5 0.5 06/06/03 Soil-P <5 2.5 274 279 70.28No OB-SP-FSA-0.5 0.5 06/06/03 Soil-P <5 2.5 274 279 70.28No OB-SP-FSL-2' 2 06/06/03 Soil-P <5 2.5 274 279 70.28

Page 20 of 24






No OB-WBO-CS-2' 2 06/06/03 Obispo <5 2.5 274 279 70.28No OB-WBO-PC-2' 2 06/06/03 Obispo <5 2.5 274 279 70.28No OB-WBO-RR-0.5 0.5 06/06/03 Obispo <5 2.5 274 279 70.28No OB-WBP-FH-0.5 0.5 06/06/03 Pismo <5 2.5 274 279 70.28No OB-WBP-FSA-0.5 0.5 06/06/03 Pismo <5 2.5 274 279 70.28No OB-WBP-FSL-3' 3 06/06/03 Pismo <5 2.5 274 279 70.28Yes B-194 50 07/19/99 Pismo <5 2.5 274 279 70.28Yes B-212 21 03/02/01 Pismo <5 2.5 274 279 70.28Yes S-18-0.5 0.5 06/05/03 Soil-P <5 2.5 274 279 70.28Yes B-53 5 09/10/97 Soil-P <5 2.5 274 279 70.28Yes B-140 5 09/23/97 Soil-O <5 2.5 274 279 70.28Yes B-159 5 07/20/99 Soil-P <5 2.5 274 279 70.28Yes B-179 5 07/21/99 Soil-P <5 2.5 274 279 70.28Yes B-152 125 11/25/97 Pismo <5 2.5 274 279 70.28Yes B-165 5 07/19/99 Soil-P <5 2.5 274 279 70.28Yes B-184 90 07/22/99 Pismo <5 2.5 274 279 70.28Yes B-198 10 02/26/01 Soil-P <5 2.5 274 279 70.28Yes WL-4-2 0 2/24/2005 Soil-P <5 2.5 274 279 70.28No Pirates Cove #1 0 07/28/99 Obispo <5 2.5 274 279 70.28Yes B-158 1 07/21/99 Soil-P <5 2.5 274 279 70.28Yes B-210 31 03/01/01 Pismo <5 2.5 274 279 70.28Yes S-36-0.5 0.5 06/04/03 Pismo <5 2.5 274 279 70.28Yes B-65 10 09/22/97 Soil-P <5 2.5 274 279 70.28Yes B-178 5 07/20/99 Pismo <5 2.5 274 279 70.28Yes B-191 10 07/27/99 Obispo <5 2.5 274 279 70.28Yes B-202 15 05/29/02 Soil-O <5 2.5 274 279 70.28No OB-SP-FSL-0.5 0.5 06/06/03 Soil-P <5 2.5 274 279 70.28Yes B-40 5 09/09/97 Soil-P <5 2.5 274 279 70.28Yes B-94 5 08/28/97 Soil-P <5 2.5 274 279 70.28Yes S-39-0.5 0.5 06/05/03 Soil-P <5 2.5 274 279 70.28Yes S-8-0.5 0.5 06/04/03 Soil-P <5 2.5 274 279 70.28Yes S-18-2.5 2.5 06/05/03 Pismo <5 2.5 274 279 70.28Yes S-9D-0.5 0.5 01/14/04 Soil-P <5 2.5 274 279 70.28Yes B-50 5 09/25/97 Pismo <5 2.5 274 279 70.28Yes B-104 5 09/17/97 Soil-P <5 2.5 274 279 70.28Yes B-210 6 03/01/01 Pismo <5 2.5 274 279 70.28Yes S-4-0.5 0.5 06/04/03 Soil-P <5 2.5 274 279 70.28Yes B-54 5 09/25/97 Soil-P <5 2.5 274 279 70.28Yes B-84 5 09/10/97 Pismo <5 2.5 274 279 70.28Yes B-83 85 09/23/97 Pismo <5 2.5 274 279 70.28Yes B-168 5 07/19/99 Soil-P <5 2.5 274 279 70.28Yes B-198 30 02/26/01 Soil-P <5 2.5 274 279 70.28Yes SP-5 15 03/04/01 Soil-P <5 2.5 274 279 70.28Yes B-209 6 03/02/01 Pismo <5 2.5 274 279 70.28Yes B-186-56 5 07/26/99 Soil-P <5 2.5 274 279 70.28Yes B-210 15 03/01/01 Pismo <5 2.5 274 279 70.28Yes BERM-6 0.5 06/05/03 Tar/Soil-P <5 2.5 274 279 70.28No Pirates Cove #2 0 07/28/99 Obispo <5 2.5 274 279 70.28Yes B-153 75 11/26/97 Pismo <5 2.5 274 279 70.28Yes B-163 50 11/20/97 Pismo <5 2.5 274 279 70.28Yes SP-5 55 03/04/01 Obispo <5 2.5 274 279 70.28Yes B-175 5 07/19/99 Pismo <5 2.5 274 279 70.28

Page 21 of 24






Yes B-176 5 07/20/99 Pismo <5 2.5 274 279 70.28Yes B-6 5 09/21/97 Pismo <5 2.5 274 279 70.28Yes B-85 5 09/19/97 Pismo <5 2.5 274 279 70.28Yes GS-4-2.5 2.5 01/15/04 Tar/Soil <5 2.5 274 279 70.28Yes B-152 50 11/23/97 Pismo <5 2.5 274 279 70.28Yes B-36 5 09/23/97 Obispo <5 2.5 274 279 70.28Yes B-149 5 11/25/97 Soil-P <5 2.5 274 279 70.28Yes B-212 6 03/02/01 Pismo <5 2.5 274 279 70.28Yes S-9-0.5 0.5 06/05/03 Soil-P <5 2.5 274 279 70.28Yes GS-5-2 2 01/15/04 Tar/Soil <5 2.5 274 279 70.28Yes B-131 25 08/26/97 Obispo <5 2.5 274 279 70.28Yes GS-2-1 1 01/15/04 Tar/Soil-P <5 2.5 274 279 70.28Yes B-167-95 50 11/21/97 Obispo <5 2.5 274 279 70.28Yes B-138 20 09/05/97 Pismo <5 2.5 274 279 70.28Yes B-57-65 5 09/24/97 Soil-P <5 2.5 274 279 70.28Yes B-76 25 09/03/97 Obispo <5 2.5 274 279 70.28Yes GS-1-0 0 01/15/04 Tar/Soil-P <5 2.5 274 279 70.28Yes B-76 15 09/03/97 Obispo <5 2.5 274 279 70.28Yes B-160 5 07/20/99 Soil-P <5 2.5 274 279 70.28Yes STR-5-1-0.5 0.5 4/25/2005 Tar/Soil-O 3.2 3.2 1 280 70.53Yes S-1A-01 1 7/16/2007 Af <9.9 4.95 95 375 94.46Yes S-1A-03 3 7/16/2007 Af <10 4.95 95 375 94.46Yes S-1B-01 1 7/16/2007 Af <9.9 4.95 95 375 94.46Yes S-1B-04 4 7/16/2007 Af <10 4.95 95 375 94.46Yes S-1C-01 1 7/16/2007 Af <10 4.95 95 375 94.46Yes S-1C-04 4 7/16/2007 Af <10 4.95 95 375 94.46Yes S-38A-01 1 7/17/2007 Soil-O <10 4.95 95 375 94.46Yes S-38B-01 1 7/17/2007 Soil-O <10 4.95 95 375 94.46Yes S-40A-03 3 7/16/2007 Pismo <9.9 4.95 95 375 94.46Yes S-40B-01 1 7/16/2007 Soil-P <10 4.95 95 375 94.46Yes S-40B-03 3 7/16/2007 Pismo <9.9 4.95 95 375 94.46Yes S-47-01 1 7/11/2007 Soil-O <9.9 4.95 95 375 94.46Yes S-47-05 5 7/11/2007 Soil-O <9.9 4.95 95 375 94.46Yes S-48-01 1 7/10/2007 Soil-O <10 4.95 95 375 94.46Yes S-48-05 5 7/10/2007 Obispo <10 4.95 95 375 94.46Yes S-49-01 1 7/10/2007 Soil-O <9.9 4.95 95 375 94.46Yes S-49-05 5 7/10/2007 Obispo <10 4.95 95 375 94.46Yes SV-02-01 1 7/11/2007 Qal <10 4.95 95 375 94.46Yes SV-02-05 5 7/11/2007 Qal <10 4.95 95 375 94.46Yes SV-02-10 10 7/11/2007 Qal <10 4.95 95 375 94.46Yes SV-03-01 1 7/11/2007 Qal <10 4.95 95 375 94.46Yes SV-03-05 5 7/11/2007 Qal <10 4.95 95 375 94.46Yes SV-03-10 10 7/11/2007 Qal <10 4.95 95 375 94.46Yes SV-04-01 1 7/11/2007 Qcol <10 4.95 95 375 94.46Yes SV-04-05 5 7/11/2007 Qcol <9.9 4.95 95 375 94.46Yes SV-04-10 10 7/11/2007 Qcol <9.9 4.95 95 375 94.46Yes SV-05-01 1 7/11/2007 Soil-O <9.9 4.95 95 375 94.46Yes SV-05-10 10 7/11/2007 Obispo <10 4.95 95 375 94.46Yes SV-08-01 1 7/12/2007 Soil-P <10 4.95 95 375 94.46Yes SV-08-05 5 7/12/2007 Pismo <10 4.95 95 375 94.46Yes SV-32-01 1 7/13/2007 Soil-O <10 4.95 95 375 94.46Yes SV-32-05 5 7/13/2007 Soil-O <10 4.95 95 375 94.46

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Yes SV-35-01 1 7/12/2007 Soil-O <9.9 4.95 95 375 94.46Yes SV-35-05 5 7/12/2007 Soil-O <10 4.95 95 375 94.46Yes SV-36-01 1 7/10/2007 Soil-O <10 4.95 95 375 94.46Yes SV-36-05 5 7/10/2007 Soil-O <10 4.95 95 375 94.46Yes SV-37-01 1 7/12/2007 Soil-O <10 4.95 95 375 94.46Yes SV-37-05 5 7/12/2007 Soil-O <9.9 4.95 95 375 94.46Yes SV-38-01 1 7/12/2007 Soil-P <9.9 4.95 95 375 94.46Yes SV-38-05 5 7/12/2007 Obispo <9.9 4.95 95 375 94.46Yes SV-41-01 1 7/13/2007 Soil-P <9.9 4.95 95 375 94.46Yes SV-41-05 5 7/13/2007 Pismo <9.9 4.95 95 375 94.46Yes SV-45-01 1 7/12/2007 Soil-P <10 4.95 95 375 94.46Yes SV-50-01 1 7/12/2007 Soil-P <10 4.95 95 375 94.46Yes SV-50-05 5 7/12/2007 Pismo <9.9 4.95 95 375 94.46Yes SV-51-01 1 7/9/2007 Soil-P <9.9 4.95 95 375 94.46Yes SV-51-05 5 7/9/2007 Pismo <10 4.95 95 375 94.46Yes SV-52-01 1 7/9/2007 Soil-P <10 4.95 95 375 94.46Yes SV-52-05 5 7/9/2007 Pismo <10 4.95 95 375 94.46Yes SV-53-01 1 7/9/2007 Soil-P <10 4.95 95 375 94.46Yes SV-53-05 5 7/9/2007 Pismo <10 4.95 95 375 94.46Yes SV-54-02 2 7/9/2007 Soil-P <10 4.95 95 375 94.46Yes SV-54-05 5 7/9/2007 Pismo <10 4.95 95 375 94.46Yes SV-55-01 1 7/10/2007 Soil-O <10 4.95 95 375 94.46Yes SV-55-05 5 7/10/2007 Obispo <10 4.95 95 375 94.46Yes SV-55-10 10 7/10/2007 Obispo <10 4.95 95 375 94.46Yes SV-56-01 1 7/10/2007 Soil-O <10 4.95 95 375 94.46Yes SV-56-10 10 7/10/2007 Obispo <10 4.95 95 375 94.46Yes SV-57-01 1 7/12/2007 Soil-P <10 4.95 95 375 94.46Yes SV-57-05 5 7/12/2007 Pismo <9.9 4.95 95 375 94.46Yes SV-58-02 2 7/10/2007 Soil-P <9.9 4.95 95 375 94.46Yes SV-58-05 5 7/10/2007 Soil-P <10 4.95 95 375 94.46Yes SV-60-01 1 7/10/2007 Soil-P <10 4.95 95 375 94.46Yes SV-60-05 5 7/10/2007 Soil-P <9.9 4.95 95 375 94.46Yes SV-61-01 1 7/10/2007 Soil-P <10 4.95 95 375 94.46Yes SV-61-05 5 7/10/2007 Soil-P <10 4.95 95 375 94.46Yes SV-62-01 1 7/10/2007 Soil-P <9.9 4.95 95 375 94.46Yes SV-62-05 5 7/10/2007 Soil-P <9.9 4.95 95 375 94.46Yes SV-63-05 5 7/9/2007 Soil-P <9.9 4.95 95 375 94.46Yes STR-14-1-0.5 0.5 4/26/2005 Tar/Soil-O <5 4.95 95 375 94.46Yes STR-9-1-0.5 0.5 4/26/2005 Tar/Soil-P <5 4.95 95 375 94.46Yes S-38A-03 3 7/17/2007 Soil-O <20 4.95 95 375 94.46Yes S-38B-03 3 7/17/2007 Soil-O <20 4.95 95 375 94.46Yes S-47-10 10 7/11/2007 Obispo <20 4.95 95 375 94.46Yes SV-05-05 5 7/11/2007 Obispo <20 4.95 95 375 94.46Yes SV-06-10 10 7/12/2007 Obispo <20 4.95 95 375 94.46Yes SV-32-10 10 7/13/2007 Obispo <20 4.95 95 375 94.46Yes STR-4-1-1.0 1 4/26/2005 Tar/Soil-O <5 4.95 95 375 94.46Yes SV-45-05 5 7/12/2007 Pismo <9.9 4.95 95 375 94.46Yes S-49-10 10 7/10/2007 Obispo <10 4.95 95 375 94.46Yes S-40A-01 1 7/16/2007 Soil-P <10 4.95 95 375 94.46Yes SV-06-01 1 7/12/2007 Soil-O <10 4.95 95 375 94.46Yes SV-06-05 5 7/12/2007 Obispo <10 4.95 95 375 94.46Yes SV-56-05 5 7/10/2007 Obispo <10 4.95 95 375 94.46

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Yes S-50-01 1 7/11/2007 Soil-O <10 4.95 95 375 94.46Yes STR-7-1-0.5 0.5 4/25/2005 Tar/Soil-O <9.3 4.95 95 375 94.46Yes S-48-10 10 7/10/2007 Obispo <10 4.95 95 375 94.46Yes STR-8-1-0.5 0.5 4/26/2005 Tar/Soil-P <25 4.95 95 375 94.46Yes STR-1-2-1.0 1 4/26/2005 Tar/Soil-O <25 4.95 95 375 94.46Yes SV-63-01 1 7/9/2007 Soil-P <10 4.95 95 375 94.46Yes S-50-10 10 7/11/2007 Obispo <9.9 4.95 95 375 94.46Yes SV-01-01 1 7/11/2007 Soil-O <10 4.95 95 375 94.46Yes S-50-05 5 7/11/2007 Soil-O <10 4.95 95 375 94.46Yes SV-01-05 5 7/11/2007 Obispo <10 4.95 95 375 94.46Yes SV-01-10 10 7/11/2007 Obispo <10 4.95 95 375 94.46Yes S-25-0.5 0.5 06/05/03 Pismo 5.5 5.5 1 376 94.71Yes S-11-0.5 0.5 06/05/03 Soil-O 5.6 5.6 2 378 95.21Yes S-24-0.5 0.5 06/05/03 Soil-O 5.6 5.6 2 378 95.21Yes S-29-2.5 2.5 06/05/03 Soil-O 5.7 5.7 1 379 95.47Yes S-26-0.5 0.5 06/05/03 Soil-O 5.8 5.8 1 380 95.72Yes S-14-2.5 2.5 06/05/03 Soil-P 5.9 5.9 3 383 96.47Yes S-16-0.5 0.5 06/04/03 Soil-P 5.9 5.9 3 383 96.47Yes S-24-2.5 2.5 06/05/03 Soil-O 5.9 5.9 3 383 96.47Yes S-16-2.5 2.5 06/04/03 Soil-P 6 6 4 387 97.48Yes S-23-0.5 0.5 06/05/03 Soil-P 6 6 4 387 97.48Yes S-26-2.5 2.5 06/05/03 Soil-O 6 6 4 387 97.48Yes S-29-0.5 0.5 06/05/03 Soil-O 6 6 4 387 97.48Yes S-11-2.5 2.5 06/05/03 Soil-O 6.1 6.1 2 389 97.98Yes S-25-2.5 2.5 06/05/03 Soil-P 6.1 6.1 2 389 97.98Yes S-23-2.5 2.5 06/05/03 Pismo 6.2 6.2 1 390 98.24Yes S-37-0.5 0.5 06/04/03 Soil-O 6.4 6.4 1 391 98.49Yes S-14-0.5 0.5 06/05/03 Soil-O 6.6 6.6 1 392 98.74Yes S-37-2.5 2.5 06/04/03 Soil-O 6.7 6.7 1 393 98.99Yes S-42-2.5 2.5 06/04/03 Soil-O 6.8 6.8 1 394 99.24Yes S-42-0.5 0.5 06/04/03 Soil-O 10 10 1 395 99.50Yes STR-6-1-0.5 0.5 4/26/2005 Tar/Soil-O 16 16 1 396 99.75

Note: Values in "Red" font are one-half the Practical Quantitation Limit.

Page 24 of 24

Attachment 2

Probability Plots

0.2 0.5 1 2 5 10 20 30 40 50 60 70 80 90 95 98 99 99.5 99.8CUMULATIVE PROBABILITY %

0

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400

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1000

CO

NC

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TRAT

ION

(mg/

kg)

LegendALL SAMPLESOFF-SITE SAMPLESSAMPLES >=10'

BARIUM - ALL AND OFF-SITEARITHMETIC SCALE

NO ANOMALOUS CONCENTRATIONS


1

10

100

1000

CO

NC

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TRAT

ION

(mg/

kg)


BARIUM - ALL AND OFF-SITELOGARITHMIC SCALE

NO ANOMALOUS CONCENTRATIONS

40 50 60 70 80 90 95 98 99 99.5 99.8CUMULATIVE PROBABILITY %

0

10

20

30

40

CO

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TRAT

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(mg/

kg)


MOLYBDENUM - ALL AND OFF-SITEARITHMETIC SCALE

Sample IDSTR-6-1-0.5

40 50 60 70 80 90 95 98 99 99.5 99.8CUMULATIVE PROBABILITY %

0.1

1

10

100

CO

NC

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TRAT

ION

(mg/

kg)


MOLYBDENUM - ALL AND OFF-SITELOGARITHMIC SCALE


0

4

8

12

16

CO

NC

EN

TRAT

ION

(mg/

kg)


THALLIUM - ALL AND OFF-SITEARITHMETIC SCALE

INFLECTION POINT?>6.8 mg/kg


Sample IDS-42-0.5

274 Samples ND @ 5 mg/kg95 Samples ND @ 9.9 mg/kg

Note: NDs plotted at half the RL

Likely range of false positivedata: 5.5 to 10 mg/kg


0.1

1

10

100

CO

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ION

(mg/

kg)


THALLIUM - ALL AND OFF-SITELOGARITHMIC SCALE

INFLECTION POINT?>6.8 mg/kg


Sample IDS-42-0.5

274 Samples ND @ 5 mg/kg95 Samples ND @ 9.9 mg/kg

Note: NDs plotted at half the RL

Documents

Analysis of Background Metals Former Avila Tank Farm ... · Addendum No. 2 to Background Metals Report Former Avila Tank Farm Page 2 Avila Beach, California May 18, 2008 environmental