DATA VALIDATION FOR XRF DATA 1999

Sverdrup Environmental, Inc. 913 663-21014400 College Boulevard FAX: 913 663-1668Suite 160Overland Park, Kansas 66211

40260359

; i I Hill IlllllSeptember 2, 1999

11

SUPERFUND RECORDS

Mr. Don BahnkeEnvironmental Protection AgencySuperfund Division901 North 5th Street , SFP 0 1999Kansas City, KS 66101

Re: Residential Validation ReportWA No. 025-SISI-07ZYContract No. 68-W5-0014

Mr. Bahnke:

This validation package includes the XRF data for 433 residential properties where access was obtainedand sampling was performed. This Data Validation Package is a supplement to the off-site laboratoryconfirmatory data validation provided in the June 21, 1999 Data Validation Package for the child carecenters. These data were validated by developing a linear regression and relative percent differences(RPD) calculations. The linear regression was developed by comparing the XRF result with thecorresponding off-site laboratory result from the same sampling location. The RPD calculations weredeveloped by using the primary and duplicate XRF samples from the same sampling location. The site-specific QAPP requires that the coefficient of determination (R2) between the XRF and off-site laboratorydata are equal to or greater than 0.49 (a linear correlation coefficient of 0.70 or greater). The RPDs mustbe less than 67 percent to meet the requirements set forth in the site-specific QAPP.

RPD tables for lead, arsenic, and zinc were developed, however, lead and zinc were the only two analytesin which the XRF results were regularly above the quantitation limits. Therefore, lead and zinc are the onl/two analytes having RPDs calculated in abundance. In those instances when RPDs were calculated foranalytes other than lead and zinc for results that were above the sample quantitation limit, the RPDs werewithin the site-specific QAPP RPD requirements. RPD results calculated for primary versus duplicatesamples when both results were below the sample quantitation limit were not considered in the QA/QC

process.

Linear regressions were only developed for lead and zinc since there were not enough data above thesample quantitation limits to perform a statistically valid linear regression for other analytes. A log-logdata transformation was performed prior to developing the linear regressions to help stabilize thecontaminant concentration variance. Based on the data transformation results, these data appear to be lognormally distributed. A majority of the higher contaminant concentration data results have a largecontaminant concentration variance. These data do not appear to be outliers influencing the distributionof the data set. Instead, at higher lead concentrations in soil, the precision of the XRF results is lowercausing an increase in the concentration variance between the XRF and off-site laboratory results. Thisis especially true for XRF results above 5532 ppm, the highest N1ST calibration standard used for

S:\SVE PROJ\OOOI55\025\DATAVAL\DV083I99.WPD

instrument calibration. Results above 5532 ppm are above the calibration curve. In addition, the largecontaminant concentration variances between the XRf and off-site laboratory results may be attributableto the soil grain-size distribution, moisture content, organic matter content, and differences in the yRF andoff-site laboratory analytical procedure methodology.

There were five RPD's for lead that did not meet the requirements set forth in the site-specific QAPP:primary XRF sample number 1284 corresponding to duplicate XRF sample number 1287 (RPD=116%);primary XRF sample number 1513 corresponding to duplicate XRF sample number 2934 (RPD= 169%);primary XRF sample number 2671 corresponding to duplicate XRF sample number 2707 (RPD=161%);primary XRF sample number 2741 corresponding to duplicate sample number 2740 (RPD=93%); andprimary XRF sample number 3839 corresponding to duplicate XRF sample number 3838 (RPD=125%).Since the above five data pairs are outside the RPD requirements, these data have been qualified as"estimated" and were "J" coded.

There were six RPD's for zinc that did not meet the requirements set forth in the site-specific QAPP:primary XRF sample number 1284 corresponding to duplicate sample number 1287 (RPD=I05%); primaryXRF sample number 2040 corresponding to duplicate sample number 2041 (RPD=68%); primary XRFsample number 2671 corresponding to duplicate sample number2707 (RPD=107%); primary XRF samplenumber 2741 corresponding to duplicate sample number 2740 (RPD=88%); primary XRF sample number3046 corresponding to duplicate sample 3047 (RPD=73%); and primary XRF sample number 3187corresponding to duplicate sample number 3188 (RPD=75%). Since the above six data pairs are outsidethe RPD requirements, these data have been qualified as "estimated" and were "J" coded.

Several XRF versus off-site laboratory samples have large contaminant concentration variances. Howeve?the R2 meets the requirements set forth in the site-specific QAPP (i.e., R2=greater than 0.49) for the dataset. Several of the lead concentration variances could be a result of lead paint chips that may haveinfluenced the sampling results. Sample pairs 2306 and 1616, 2320 and 1684, 2335 and 1828, 2350 and2075,2680 and 2398, 2693 and 2486, 3434 and2789, 3436 and 2811, 3447 and 2896, 3448 and 2906, 3458and 3044, 3486 and 3308, 3491 and 3402, 4074 and 3516, 4079 and 3547, 4087 and 3651, 4095 and3799,and 4100 and 3830 are foundation samples where lead paint chips may have affected the sampling resultsand caused lead concentration variances between the XRF and off-site laboratory results.

If you have any questions, please feel free to give me a call at (913) 663-2108.

Sincerely,

SVERDRUP ENVIRONMENTAL INC.

Todd Trometer, P.O.Project Manager

cc: 155-0250033.7

S:\SVE PROJ\000155\025\DATAVAL\DV083I99.WPD

Transformed Zinc Confirmatory vs XRF Results

4.0

3.5 -

3.0

2.5

3(A

U.XD)O

2.0 -

1.5 -

1.0

0.5 -

y = 0.9078X + 0.2871

R2 = 0.877

0.0

0.0 0.5 1.0 1.5 2.0 2.5

Log Confirmatory Results

3.0 3.5 4.0

Transformed Lead Confirmatory Results vs XRF Results

4.5 n

4.0

3.5 -

3.0 -

3U0)

LL

XO)o

2-0 4

1.5 -

y = 0.6398x +0.9141

R2 = 0.7618

1.0 -

0.5 -

0.0

0.0 0.5 1.0 1.5 2.0 2.5 3.0

Log Confirmatory Result

3.5 4.0 4.5 5.0

Linear Regression ResultsLead Units mg/KgAugust 26, 1999

POP SampleNo.0053100572007180088400890009670098501003010600106701082011000111701120011280113501144011600118101184011890122701265012820128801315013340134701362013670138202294022950229602297022980229902299023000230102302023030230502306023070230802309023100231102312023130231402315

XRF SampleNo.0052900570007160088200888009650098301001010590106501080010980111501118011260113301142011580117901182011870122501263012800128401313013320134501360013650138002933015210152801545015530155701557015600158401587015910160001616016190162701627016420164301647016500166301664

POP LeadResults

1300 J534 J307934329 J113 J21 J287 J197 J378 J244 J874 J142 J19 J

299 J440 J192 J239 J899 J59 J109 J123 J2270 J330 J52 J383 J1800 J650 J638 J447 J7283233983391800236236399127043441150328706709435944342912360302624918

XRF LeadResults

940.8584.066.4502.452.5 U59.6106.938.4 U417.2353.0240.8282.8838.4178.758.8442.4531.2250.2256.2935.263.7167.4108.02240.0428.8116.3574.01680.0662.0665.2975.21160.0366.2514.8310.81429.6231.6238.4373.81129.6497.2414.4534.01779.2656.01080.01080.0348.6287.01289.6374.6568.0828.8

log POPResults

3.12.71.52.91.61.52.11.32.52.32.62.42.92.21.32.52.62.32.43.01.82.02.13.42.51.72.63.32.82.82.72.92.52.62.53.32.42.42.63.12.62.62.73.52.83.02.82.62.53.42.52.83.0

log XRFResults

3.02.81.82.71.71.82.01.62.62.52.42.52.92.31.82.62.72.42.43.01.82.22.03.42.62.12.83.22.82.83.03.12.62.72.53.22.42.42.63.12.72.62.73.32.83.03.02.52.53.12.62.82.9

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PDF SampleNo.0231602317023180231902320023210232202323023240232502326023270232802329023300233102332023330233402335023360233702338023390234002341023420234302344023450234602347023480234902350023510235202353023550267202673026740267502676026770267802679026800268102682026830268402685

XRF SampleNo.0167001673016830168301684017050170801720017240172701730017430174801767017880178901801018100182001828018460186001863018650188801891019130191701918019240192902059020640207402075020860209802104021210219102212022270223902284023620237002384023980242302420024840249602533

POP LeadResults

135467183018801350011712614689

21206283 J26 J203 J459 J347 J25 J83 J50 J

1340 J717 J622 J517 J387 J268 J134 J85 J191 J73 J38 J

111 J346303651693039615451530273558522206065036492199439001540480333207447

XRF LeadResults

146.7483.21289.61289.6690.0176.7126.7154.4109.42609.6

78.696.533.9

231.0519.6410.845.7178.391.8544.8822.4679.2557.6443.6492.4187.4111.4234.258.354.0114.2366.0376.0732.43878.4406.8206.6598.0278.8397.2809.6631.6519.2744.4418.4931.21089.62960.02080.0868.8419.6255.6905.6

log POPResults

2.12.73.33.34.12.12.12.21.93.31.81.91.42.32.72.51.41.91.73.12.92.82.72.62.42.11.92.31.91.62.02.52.52.83.82.62.22.72.51.92.72.73.32.82.63.03.03.63.22.72.52.32.7

log XRFResults

2.22.73.13.12.82.22.12.22.03.41.92.01.52.42.72.61.72.32.02.72.92.82.72.62.72.32.02.41.81.72.12.62.62.93.62.62.32.82.42.62.92.82.72.92.63.03.03.53.32.92.62.43.0

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PDF SampleNo.0268602687026880268902690026910269202693026940269502696026970269802699027000270102702027030270402705027060270702799028000280102802028030280402805034330343403435034360343703438034390344003441034420344303444034450344603447034480344903450034510345203453034540345503456

XRF SampleNo.

0251102277023940240602474024490245502486024880249302491025360256002572025750257902608026290271602718026640267102745027340273802741027290273102659027660278902793028110281302823028330283702846028640286902883028910289302896029060294802957029670299103010030170302303033

POP LeadResults

364972251966537268710606044153778212016997834292357203226329350195246250326822594223215276795183940390020012608337324067434384251901500025500129509413137463924176722

XRF LeadResults

514.4979.230.8234.4534.41349.6836.03308.8630.0687.6594.8165.4190.4103.51169.6350.6356.2271.6280.4246.2337.0173.7368.0251.2332.096.7331.4370.0339.2582.4223.2574.42788.8687.6197.41620.075.2504.8249.4642.0340.8557.62809.66320.04707.292.8503.6400.885.0432.0790.4182.9970.4

log POPResults

2.63.01.42.32.82.93.93.82.62.72.92.12.22.02.92.52.62.32.42.52.52.32.42.42.51.92.42.62.52.72.82.73.63.62.33.11.92.62.42.82.52.93.74.24.42.12.72.62.12.73.02.22.9

log XRFResults

2.73.01.52.42.73.12.93.52.82.82.82.22.32.03.12.52.62.42.42.42.52.22.62.42.52.02.52.62.52.82.32.83.42.82.33.21.92.72.42.82.52.73.43.83.72.02.72.61.92.62.92.33.0

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PDF SampleNo.0345703458034590346003461034620346303464034650346603467034680346903470034710347203473034740347503476034770347803479034800348103482034830348403485034860348703488034890349003491034920401304072040730407404075040790408004081040820408304085040860408704088040890409004091

XRF SampleNo.0303503044030460307003092031110311203123031270314603157031580316403176031860319403235032400324803203032650327503261029010313803293032950330003307033080331003320033250338203402034150211803499035090351603530035470357503577036130362403644036480365103658036700377903782

POP LeadResults

116012300244904681110634599409228015020320203631200605118055958213132651484816040232

1260110

14107610482132080484457501582070

5138646004570450048905050446035805070583046704890382032404900

XRF LeadResults1149.62459.2145.587.8474.4709.2534.4601.6289.01469.6174.9232.41309.6358.21769.6574.4969.6555.2851.2131.0345.6557.6317.4191.9513.232.8 U1249.6150.31469.62769.6510.41549.6774.81089.61080.0206.01549.660.6409.61100.0412.4171.7358.6991.2468.82348.8518.4931.21309.6699.2375.4980.0964.8

log POPResults

3.14.12.42.02.73.02.82.82.63.42.22.33.32.63.12.83.12.72.82.12.52.72.92.22.61.53.12.03.13.92.73.12.92.93.82.23.31.72.63.73.73.73.73.73.63.63.73.83.73.73.63.53.7

log XRFResults

3.13.42.21.92.72.92.72.82.53.22.22.43.12.63.22.83.02.72.92.12.52.72.52.32.71.53.12.23.23.42.73.22.93.03.02.33.21.82.63.02.62.22.63.02.73.42.73.03.12.82.63.03.0

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PDF SampleNo.04092040930409404095040960409704098040990410004101041020410304104041050410604107041080410904110041110411204113049190492004921049220492304924049260492704928049290493004938

XRF SampleNo.03685037860379803799038090382503826038280383003844038530388503903039070384503925039380394703950039520395403971019520195801967019720197501978019900203402045020490205801599

POP LeadResults

31003140122075903121150110066406870673624450

56000105070621571321950411401979081242210050514091240511110456849449

XRF LeadResults

483.21029.61189.64828.8328.01060.01020.03657.63718.4633.2549.6416.81509.6866.4552.4236.2581.2154.81988.81389.6282.0595.6131.636.7104.779.090.3466.4923.2475.6118.5459.6834.4497.6

log POPResults

3.53.53.13.92.53.13.03.83.82.82.82.74.73.02.82.32.92.32.73.12.33.02.11.32.01.71.72.63.12.72.02.72.92.7

log XRFResults

2.73.03.13.72.53.03.03.63.62.82.72.63.22.92.72.42.82.23.33.12.52.82.11.62.01.92.02.73.02.72.12.72.92.7

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Linear Regression ResultsZinc Units mg/KgAugust 26, 1999

POP SampleNo.

0053100572007180088400890009670098501003010600106701082011000111701120011280113501144011600118101184011890122701265012820128801315013340134701362013670138202294022950229602297022980229902299023000230102302023030230502306023070230802309023100231102312023130231402315

XRF SampleNo.

0052900570007160088200888009650098301001010590106501080010980111501118011260113301142011580117901182011870122501263012800128401313013320134501360013650138002933015210152801545015530155701557015600158401587015910160001616016190162701627016420164301647016500166301664

POP ZincResults

590.0300.049.0

280.064.060.0

150.044.0

180.0120.0

1200.0240.0410.0190.037.0

350.0280.0180.0200.0520.063.069.097.0

920.0200.0

75.0240.0650.0310.0370.0200.0510.0240.0240.0290.0840.0130.0130.0460.0260.0340.0390.0240.0630.0420.0530.0410.0320.0260.0470.0140.0380.0180.0

JJ

JJJJJJJJJJJJJ

JJJJJJ

XRF ZincResults

824.8383.699.3

313.690.4

115.7156.289.7

256.6178.6272.4338.6550.8272.8

92.7582.4396.6248.2135.9686.8

85.493.3

144.91449.6321.489.3

316.4815.2344.8

442327

679.6227.2327.8213.8839.286.4

177.5534

294.4359.6278.8

281816.4509.2537.6537.6322.4286.8525.6104.7

357242.6

U

U

U

log POPResults

2.82.51.72.41.81.82.21.62.32.13.12.42.62.31.62.52.42.32.32.71.81.82.03.02.31.92.42.82.52.62.32.72.42.42.52.92.12.12.72.42.52.62.42.82.62.72.62.52.42.72.12.62.3

log XRFResults

2.92.62.02.52.02.12.22.02.42.32.42.52.72.42.02.82.62.42.12.81.92.02.23.22.52.02.52.92.52.62.52.82.42.52.32.91.92.22.72.52.62.42.42.92.72.72.72.52.52.72.02.62.4

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Linear Regression ResultsZinc Units mg/KgAugust 26,1999

POP SampleNo.0231602317023180231902320023210232202323023240232502326023270232802329023300233102332023330233402335023360233702338023390234002341023420234302344023450234602347023480234902350023510235202353023550267202673026740267502676026770267802679026800268102682026830268402685

XRF SampleNo.

0167001673016830168301684017050170801720017240172701730017430174801767017880178901801018100182001828018460186001863018650188801891019130191701918019240192902059020640207402075020860209802104021210219102212022270223902284023620237002384023980242302420024840249602533

POP ZincResults

81.0220.0880.0770.0390.0190.0220.0210.0150.01200.0120.0120.054.0140.0270.0260.045.0160.090.0330.0200.0420.0280.0350.096.070.0100.093.0130.051.0270.0160.0170.0280.0940.0180.0110.0270.0190.084.0270.0240.0J230.0310.0300.0250.0300.01900.0400.0280.0170.0180.0320.0

XRF ZincResults

126.5180.7702|702

409.6167.6281.8229.2139.51469.6174.888.283

131.3321

252.674.921290.1282.8240

480.8346.4440.8149.678.4124.1129.8168.478.6290.298.9

251.4426

1249.6140.2103.1194.1115.5373

279.4271.2252.6285

360.6279.6415.62240643.6466.8234.2263.2649.6

U

U

U

U

log POPResults

1.92.32.92.92.62.32.32.32.23.12.12.11.72.12.42.41.72.22.02.52.32.62.42.52.01.82.02.02.11.72.42.22.22.43.02.32.02.42.31.92.42.42.42.52.52.42.53.32.62.42.22.32.5

log XRFResults

2.12.32.82.82.62.22.42.42.13.22.21.91.92.12.52.41.92.32.02.52.42.72.52.62.21.92.12.12.21.92.52.02.42.63.12.12.02.32.12.62.42.42.42.52.62.42.63.42.82.72.42.42.8



POP SampleNo.0268602687026880268902690026910269202693026940269502696026970269802699027000270102702027030270402705027060270702799028000280102802028030280402805034330343403435034360343703438034390344003441034420344303444034450344603447034480344903450034510345203453034540345503456

XRF SampleNo.

0251102277023940240602474024490245502486024880249302491025360256002572025750257902608026290271602718026640267102745027340273802741027290273102659027660278902793028110281302823028330283702846028640286902883028910289302896029060294802957029670299103010030170302303033

POP ZincResults210.0300.051.0110.0250.0720.02100.01200.0270.0300.0290.093.0130.069.0380.0350.0250.0130.0120.0240.0170.094.0110.0190.0220.0100.0140.0110.0230.0400.0430.0300.0800.0350.0240.0840.069.0

210.0290.0410.0210.0250.0970.02300.01700.0110.0370.0230.089.0270.0440.0200.0220.0|

XRF ZincResults

271.6352.671.8144.9229.81349.61440

1429.6409.6354.622395.1237.8

74813.2336.6373.6179.6197.5273.8134.7124.6126.1230.6276.693.2196.9146.1286.6468.4207.2292.4888.8216

260.81040113.8181.7330.6441.6240.4289.4882.42969.61049.6

94.6460.4224.8122.7266.6432

221.2284

U

U

log POPResults

2.32.51.72.02.42.93.33.12.42.52.52.02.11.82.62.52.42.12.12.42.22.02.02.32.32.02.12.02.42.62.62.52.92.52.42.91.82.32.52.62.32.43.03.43.22.02.62.41.92.42.62.32.3

log XRFResults

2.42.51.92.22.43.13.23.22.62.52.32.02.41.92.92.52.62.32.32.42.12.12.12.42.42.02.32.22.52.72.32.52.92.32.43.02.12.32.52.62.42.52.93.53.02.02.72.42.12.42.62.32.5



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XRF SampleNo.0303503044030460307003092031110311203123031270314603157031580316403176031860319403235032400324803203032650327503261029010313803293032950330003307033080331003320033250338203402034150211803499035090351603530035470357503577036130362403644036480365103658036700377903782

POP ZincResults2000.01200.0150.0100.0410.0540.0390.0300.0310.0920.0110.0170.0710.0400.0240.0440.0480.0500.0150.0110.0200.0300.0150.0110.0300.078.0730.0120.0320.0480.0210.0420.0250.0430.0900.0270.0420.088.0370.0610.0390.0230.0240.0260.0140.0600.0350.0570.0760.0270.0200.0410.0520.0

XRF ZincResults1899.21309.6118.286.9

415.2438.8314.6356

632.81040158.9135.3680.8392.8388.2480.8584

607.6194.6119.3289.6362.2156

156.3307.684.5730

182.4492.4703.2195.4524282

532.4817.6274.8470

108.6410688

412.8247.8246.8383.2179.5815.6369.8881.61020267.8248.2554.8566.4

U

log POPResults

3.33.12.22.02.62.72.62.52.53.02.02.22.92.62.42.62.72.72.22.02.32.52.22.02.51.92.92.12.52.72.32.62.42.63.02.42.61.92.62.82.62.42.42.42.12.82.52.82.92.42.32.62.7

log XRFResults

3.33.12.11.92.62.62.52.62.83.02.22.12.82.62.62.72.82.82.32.12.52.62.22.22.51.92.92.32.72.82.32.72.52.72.92.42.72.02.62.82.62.42.42.62.32.92.62.93.02.42.42.72.8


Linear Regression ResultsZinc Units mg/KgAugust 26,1999

PDF SampleNo.

04092040930409404095040960409704098040990410004101041020410304104041050410604107041080410904110041110411204113049190492004921049220492304924049260492704928049290493004938

XRF SampleNo.

03685037860379803799038090382503826038280383003844038530388503903039070384503925039380394703950039520395403971019520195801967019720197501978019900203402045020490205801599

POP ZincResults

340.0360.0640.0

1900.0200.0830.0400.0870.0

1500.0550.0430.0340.0270.0460.0510.0160.0360.0110.0300.0610.0

86.0440.0110.046.098.066.076.0

460.0720.0380.0130.0260.0180.0200.0

XRF ZincResults

325472.4862.4

1739.2229.6917.6

38511802080548.8558.4

446362.8542.4585.2192.9

390119.8316.6940.8

96.3478.8

15582.573.688.9

97573.2780.4454.8

91.6347.2132.6170.5

U

log POPResults

2.52.62.83.32.32.92.62.93.22.72.62.52.42.72.72.22.62.02.52.81.92.62.01.72.01.81.92.72.92.62.12.42.32.3

log XRFResults

2.52.72.93.22.43.02.63.13.32.72.72.62.62.72.82.32.62.12.53.02.02.72.21.91.91.92.02.82.92.72.02.52.12.2


LEAD: Relative Percent Difference (RPD) Calculations for Primary vs. Duplicate SamplesXRF Results from Residential Areas in Omaha, Nebraska and Council Bluffs, Iowa

Units mg/Kg

Street Address21 02 South 8th Street1228 South 10th Street5223 Grand1458 South 11th1458 South 11th261 3 Avenue G2739 Avenue D241 2 Avenue H2413Blondo2413Blondo2502 Burdette261 0 Patrick261 4 Patrick2436 Parker2436 Parker2508 Parker2428 Seward2522 Erskine2527 Blondo2527 Blondo2527 Blondo2116 Binney2525 Maple2531 Maple2512Corby2512Corby2130 Binney Street2515 Binney Street2519 Binney Street221 6 N. 25th Street221 6 N. 25th Street2906 N. 25th Street2611 Parker2416 Binney1912 North 26th Street271 5 North 26th2620 Grant1775 South 9th281 6 North 26th131 5 South 10th923 South 8th371 9 Mason3719 Mason525 South 31st Avenue2540 Avenue D2431 Avenue D2546 Avenue G2716 Avenue G1013Castelar833 South 41st91 2 South 41st1020 South 41st1020 South 41st1022 South 41st Street916 South 41st

CityOmahaOmahaOmahaOmahaOmahaCouncil BluffsCouncil BluffsCouncil BluffsOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaCouncil BluffsCouncil BluffsCouncil BluffsCouncil BluffsOmahaOmahaOmahaOmahaOmahaOmahaOmaha

PrimarySample #

005290057000716008820088800965009830100101059010650108001098011150111801126011330114201158011790118201187012250125801263012800128401313

01332013450136001365013800151301538015540156701581015950160501620016540167001675016870171001725017390174401763017800179601810018100183301846

DuplicateSample**

00530005710071700883008890096600984010020105901066010810109901116011190112701134011430115901180011830118801226012590126401281012870131401333013460136101366013810293401539015550156801582015960160601621016550167101676016880171101726017400174501764017810179701811018150183401847

Primary Sample

LeadResult

991.2642.449.4

558.038.154.863.350.9

417.2345.6210.0334.8808.8196.439.0

365.8550.8260.8276.0892.0

66.5191.493.6

181.82249.6

114.288.4

540.41569.6736.0607.6924.0551.6259.8484.8535.2327.2146.4209.4402.2138.2157.6

1300.097.6

138.2124.672.479.6

625.660.8

242.8194.2143.030.3

535.6

Lead Prec130.0130.026.979.9

U33.227.0

U33.656.241.354.2

150.053.4

U37.6

110.051.947.6

180.028.738.342.753.0

300.0J

28.8110.0300.0100.0

85.1120.0J

56.793.6

100.067.842.051.076.039.541.558.722.742.840.122.033.641.021.653.126.823.917.991.0

Dup Sample

LeadResult

940.8584.0

66.4502.4

52.559.6

106.938.4

417.2353.0240.8282.8838.4178.758.8

442.4531.2250.2256.2935.2

63.7167.4104.2108.0

2240.0428.8116.3574.0

1680.0662.0665.2975.2

46.3260.2481.2556.4276.4257.0191.7437.6116.8146.7

1069.665.2

138.1123.049.671.1

759.667.9

218.8178.3178.340.7

822.4

Lead Prec180.0120.038.9

100.0U

25.929.0

U63.680.261.770.4

110.036.238.370.8

100.042.863.1

130.028.448.441.832.2

420.0J

37.581.2

220.0130.091.9

190.0UJ

57.694.4

110.059.6

59.248.381.124.023.8

200.032.426.724.732.121.347.133.052.041.841.827.142.1

Relative %Difference

(RPD)

5%10%29%10%

NA8%

51%NA

0%2%

14%17%4%9%

40%19%4%4%7%5%4%

13%11%51%0%

116%27%6%7%

11%9%5%

169%0%1%4%

17%

55%9%8%

17%7%

19%40%0%1%

37%11%19%11%10%9%

22%29%42%

s:\Sve_proj\00015S\02S\data val\xrf081199_2\Lead Page 1 of 4

LEAD: Relative Percent Difference (RPD) Calculations for Primary vs. Duplicate SamplesXRF Results from Residential Areas In Omaha, Nebraska and Council Bluffs, Iowa

Units mg/Kg

Street Address621 South 32nd Avenue101 8 South 40th101 8 South 40th1 006 South 40th1001 South 41st1001 South 41st4345 Mayberry4345 Mayberry4320 Marcy4320 Marcy4227 Mayberry4340 Mayberry4301 Barker4301 Barker431 7 Barker3710 Mason21 23 Locust Street221 6 Maple St.221 6 Maple St.2120 Binney1419Cady1421 Cady1421 Cady1911 Lothrop1922 Loth rop21 24 Maple1604 Willis3410 North 16th3410 North 16th181 6 Willis1608 Lake1608 Lake1612LakeSt1817Corby1817Corby201 2 Locust21 20 Wirt2215 Binney2215 Binney2211 Locust221 1 Locust2202 Pinkney201 2 Emmet2003 Pinkney2003 Pinkney1821 Spencer1821 Spencer21 15 Pinkney1625 Pinkney1625 Pinkney1907 Spencer1814 Pinkney1484 Pinkney1 473 Emmet1 473 Emmet

CityOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmaha

PrimarySample #

0186601885018920190101919019220195501961019720197401991020080202302028020400206002113022570226202272022890236802374023860239802404024190243602440024540246502465024700247302480024880250902527025310254402549025600256802589025930260602610026260266502671

0271102714027310273402741

DuplicateSample #01867018860189301903019200192301956019620197301978019920200902024020320204102061021140225802263022730229002369023750238702399024050242002437024410245502466024660247102474024810248902510025280253202545025540256102569025900259402607026110262702666027070271202715027320273502740

Primary Sample

LeadResult

242.8152.447.654.9

294.0166.449.330.653.9

466.4377.4266.2137.6276.6216.4494.4258.4264.2

71.52188.8624.0275.0178.3171.4

3200.0313.2868.8281.6173.5836.0630.8630.8630.0534.4110.0596.0481.2835.2

1260.0647.2626.8174.442.8

770.059.4

446.01779.2757.2959.2

1629.6635.2185.5328.2290.0264.8

Lead Prec54.423.1

U30.655.822.719.9

U28.737.429.729.840.129.427.238.858.528.532.379.1

120.059.647.143.1

550.065.547.459.644.0

1 50.042.4

J42.695.824.7

110.038.947.960.3

120.041.947.0

U46.821.738.4

320.0130.0

50.7J

42.646.533.030.0

J

Dup Sample

LeadResult

313.086.338.468.1

203.593.151.743.579.0

425.6346.0235.0145.6222.0189.9496.0298.4335.0104.8

2729.6660.8321.6286.8157.4

2960.0309.8729.2263.2196.8

1260.01140.01369.6582.0522.4122.1630.0517.6995.2

1189.6626.8663.2190.438.5

826.470.3

564.42188.8664.4816.4173.7630.0200.1370.0251.2

96.7

Lead Prec64.230.821.025.326.034.227.5

U20.682.367.952.425.752.644.735.363.166.223.6

470.043.031.130.823.592.330.7

130.029.626.957.0

200.0J

40.833.540.242.340.252.356.742.2

120.028.919.6

150.034.439.881.041.746.5

J41.528.375.529.0

J


(RPD)

25%

55%

21%21%

36%

56%

5%

NA

38%

9%

9%

12%

6%

22%

13%

0%

14%

24%

38%

22%

6%

16%

47%

9%

8%

1%

17%

7%

13%

40%

58%

74%

8%

2%

10%6%

7%

17%

6%

3%

6%

9%

11%

7%

17%

23%

21%

13%16%

161%1%8%

12%14%93%

s:\Sve_proj\000155\025\data val\xrf081199_2\Lead Page 2 of 4

LEAD: Relative Percent Difference (RPD) Calculations for Primary vs. Duplicate SamplesXRF Results from Residential Areas In Omaha, Nebraska and Council Bluffs, Iowa

Units mg/Kg

Street Address2224 Evans2101 Evans1 620 Evans1 620 Evans2023 Spencer1807Corby21 18 Evans261 2 North 15th Street261 2 North 15th StreetStreet2201 Locust2531 Florence2251 Florence2088 Parker Circle2088 Parker Circle251 4 North 17th Street1619 Pinkney2197 Parker Circle21 92 Parker Circle2192 Parker Circle1619 Emmet3608 North 21 st Street2022 North 18th Street625 Pierce625 Pierce1 21 3 Pierce713 Williams620 Williams41 6 Williams610 Hickory610 Hickory814 Hickory707 Hickory813 Frances813 Frances625 Dorcas708 Dorcas715 Dorcas101 3 Hickory1123Castelar1123Castelar1210Castelar1006 Arbor822 Bancroft1402 Park Wild1402 Park Wild1230 Park Wild1230 Park Wild1254 Park Wild81 4 Forest81 4 Forest1126 Frederick151 7 Park Wild191 4 South 16th Street2302 South 6th Street


PrimarySample #

02754027700279602806028110281402830028490285402862028700288602903029370294202958029690297202987029930300803027030380304603052030620307803097031000311603118031350315103168031730318703189032010320703224032290324103256032720328403290033050330803320033420334603362033780339103397


Primary Sample

LeadResult

344.6130.675.7

418.82409.6

540.8242.6947.2307.6

2548.8302.2333.6209.244.7

225.6312.0

3760.093.7

143.349.6

786.4163.1

2280.0191.2197.176.7

463.2860.0713.6512.4321.8405.8101.1174.5185.0133.2407.2

1120.0495.6261.4234.6572.8218.2378.4250.0297.0513.6

3139.21469.6681.6

51.2151.1297.0303.6762.4

Lead Free34.742.821.929.3

440.037.929.8

180.032.588.031.431.945.9

U31.028.5

670.022.542.030.344.942.630.328.827.520.237.4

150.042.135.631.378.439.921.042.339.780.4

210.091.628.954.699.523.030.027.131.7

100.094.258.543.521.325.332.560.2

130.0

Dup Sample

LeadResult

376.2146.079.4

416.02788.8577.2254.0884.8299.0

3558.4316.6331.4243.280.8

209.2331.4

4028.8123.6141.331.3

638.0117.9

3049.6145.5130.0

I 85.2461.2868.0768.8442.4382.0508.4107.3233.4194.0106.5446.4

1680.0628.4190.9218.4502.8239.2322.8326.0316.0551.6

2769.61549.6534.4

75.4170.4210.0306.6389.2

Lead Prec36.127.334.036.094.4

110.048.850.964.1

640.065.470.327.5

' 21.153.765.6

120.039.624.8

U

110.025.0

550.044.641.033.985.351.5

140.079.674.038.024.743.027.722.837.066.837.545.928.732.851.960.671.061.641.1

490.0270.099.036.946.954.928.231.7


(RPD)

9%

11%

5%

1%

15%

7%

5%

7%

3%

33%

5%

1%

15%

58%

8%

6%

7%

28%

1%

45%

21%

32%

29%

27%

41%

11%

0%

1%

7%

15%

17%

22%

6%

29%

5%

22%

9%

40%

24%

31%

7%

13%

9%

16%

26%

6%

7%

13%

5%

24%

38%

12%

34%

1%

65%

s:\Sve_praj\0001 S5\025\data val\xrf081199_2\Lead Page 3 of 4

LEAD: Relative Percent Difference (RPD) Calculations for Primary vs. Duplicate SamplesXRF Results from Residential Areas in Omaha, Nebraska and Council Bluffs, Iowa

Units mg/Kg

Street Address

2302 South 6th Street

251 8 South 6th Street

251 8 South 6th Street

241 0 South 6th

1721 South 7th2025 South 6th

2025 South 6th

2021 South 6th

141 7 South 8th

171 3 South 8th

1425 South 8th2002 South 7th Street

2002 South 7th Street1 31 4 South 9th

1704 South 9th

1716 South 9th

301 1 South 9th

301 1 South 9th231 5 South 8th


2003 South 8th

121 5 South 10th

911 Pierce

911 Pierce720 Pierce


1953 South 11th

1938 South 11th Street

1434 South 11th

1222 South 12th

131 7 South 12th

131 3 South 12th1313 South 121h1311 South 12th

1709 South 7th


2521 South 6th


141 3 South 5th

1 41 3 South 5th1721 South 12th

2702 South 12th

2748 South 12th

City

Omaha

Omaha

Omaha

Omaha

Omaha

Omaha

Omaha

Omaha

Omaha

Omaha

OmahaOmaha

Omaha

Omaha

Omaha

Omaha

OmahaOmaha

Omaha

Omaha

Omaha

Omaha

Omaha

Omaha

OmahaOmaha

OmahaOmaha

OmahaOmaha

Omaha

Omaha

Omaha

OmahaOmahaOmaha

Omaha

OmahaOmaha

Omaha

OmahaOmaha

Omaha

OmahaOmaha

Omaha

Omaha

PrimarySample/*

0340603419

03424

03502

03518

03536

03541

03547

0355503559

03575

03598

0360203616

0362603635

036520366003670

03687

03720

03726

03776

0377903784

038000381303831

03839

03844

03846

03877

03887

038940389903910

03925

0394103960

03963

0398203996

04015

04019

04039

04061

04062

DuplicateSampled

03407

03420

03425

03501

03519

03537

03542

0354803556

03560

0357603599

0360303617

03627

0363603653

0366103671

03688

03721

03727

03777

0378003785

03801

038140383203838

03845

03847

03878

03888

03895039000391103926

0394203961

03964

0398303997

04016

0402004040

04061

04063

Primary Sample

LeadResult

59.973.371.253.893.3

275.0

62.1122.5279.2

126.5363.2128.949.6

416.8835.2

305.4

357.0

218.6375.8

395.2155.086.1

339.4

859.2

738.0

573.2111.7324.0

291.4552.4

234.6

85.3457.2

346.2321.6194.7236.8

266.095.5

100.9181.7

1500.0

269.8

169.0370.8

197.9492.4

Lead Prec

24.736.821.91 8.824.125.929.340.559.338.672.425.720.835.051.966.229.427.929.172.025.023.235.2

1 40.045.036.936.767.0

J39.429.635.999.433.064.727.558.956.024.237.826.463.860.348.679.629.037.4

Dup Sample

LeadResult

77.077.562.892.392.2

270.4

37.5171.7231.6114.1358.6

125.145.6

340.8974.4

301.4453.2

230.2375.4

315.0195.379.1

378.2980.0

753.6

665.6

172.2325.0

67.4633.2224.2

69.8459.2

422.0309.8208.8

236.2

287.092.0

107.8146.4

1160.0

253.4

98.1340.6

197.9527.2

Lead Prec

38.724.632.736.736.954.622.621.027.824.631.041.1

U65.4

190.033.179.254.772.029.546.735.081.548.4

130.0110.0

26.731.8

J120.054.822.539.781.431.251.4

32.029.037.324.341.3

200.0

27.724.335.329.0

100.0


(RPD)

25%

6%

13%

53%

1%

2%

49%

33%

19%

10%

1%

3%

8%

20%

15%

1%

24%

5%

0%

23%

23%

8%

11%

13%

2%

15%

43%

0%

125%

14%

5%

20%

0%

20%4%

7%

0%

8%

4%

7%

22%26%

6%

53%

8%

0%

7%

"U" indicates a non-detect at level presented in "Result" column"J" indicates estimated concentration

"UJ" indicates an estimated non-detect analyte concentration

"NA" indicates not applicable

s:\Sve_projW00155\025\data val\xrf081199_2\Lead Page 4 of 4

ZINC: Relative Percent Difference (RPD) Calculations for Primary vs. Duplicate SamplesXRF Results from Residential Areas in Omaha, Nebraska and Council Bluffs, Iowa

Units mg/Kg

Street Address21 02 South 8th Street1228 South 10th Street5223 Grand1458 South 11th1458 South 11th261 3 Avenue G2739 Avenue D241 2 Avenue H241 3 Blondo2413Blondo2502 Burdette2610 Patrick261 4 Patrick2436 Parker2436 Parker2508 Parker2428 Seward2522 Erskine2527 Blondo2527 Blondo2527 Blondo2116 Binney2525 Maple2531 Maple2512Corby2512Corby2130 Binney Street251 5 Binney Street251 9 Binney Street221 6 N. 25th Street221 6 N. 25th Street2906 N. 25th Street2611 Parker2416 Binney1 91 2 North 26th Street271 5 North 26th2620 Grant1775 South 9th281 6 North 26th131 5 South 10th923 South 8th371 9 Mason3719 Mason525 South 31st Avenue2540 Avenue D2431 Avenue D2546 Avenue G271 6 Avenue G1013Castelar833 South 4 1st91 2 South 41st1020 South 41st1020 South 41st1022 South 41st Street

CityOmahaOmahaOmahaOmahaOmahaCouncil BluffsCouncil BluffsCouncil BluffsOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaCouncil BluffsCouncil BluffsCouncil BluffsCouncil BluffsOmahaOmahaOmahaOmahaOmahaOmaha

PrimarySample #005290057000716008820088800965009830100101059010650108001098

' 011150111801126011330114201158011790118201187012250125801263012800128401313013320134501360013650138001513015380155401567015810159501605016200165401670016750168701710017250173901744017630178001796018100181001833


Primary Sample

ZincResult

894.4433.2

71.1371.6132.785.5

146.1105.0256.6224.2307.0331.0404.2216.8108.5586.8319.4244.0284.6606.8108.4142.196.8

101.11 569.6100.0167.6299.4748.4462.8486.4346.4131.0181.9264.2320.8276.6

86.7132.8244.0

84.379.4

661.291.4

196.5180.0298.484.4

474.871.8

126.9345.2215.086.8

Zinc Prec130.0120.044.171.848.0

U47.8

U59.756.764.967.4

110.082.345.5

150.098.981.1

J140.047.048.8

UU220.0

UJ48.894.0

160.081.183.268.757.666.482.089.682.3

U65.674.7

UU

56.932.272.768.741.7

U48.531.859.642.636.328.8

Dup Sample

ZincResult

824.8383.699.3

313.690.4

115.7156.289.7

256.6178.6272.4338.6550.8272.8

92.7582.4396.6248.2135.9686.8

85.493.393.4

144.91449.6321.489.3

316.4815.2344.8442.0327.089.1

128.5328.0349.2162.288.5

113.9210.6125.7126.5616.084.3

300.6226.4226.6

77.5484.881.499.0

212.0212.074.6

Zinc Prec180.0110.0

U97.1

U44.746.745.559.780.991.4

100.088.658.5

U100.086.854.6

J100.045.5

UU

49.7290.0J

57.465.2

120.0100.079.299.5

U64.490.996.566.7

U63.870.633.731.9

140.0U

43.439.574.431.851.9

U61.664.864.8

U


(RPD)

8%

12%

33%

17%

38%

30%

7%

16%

0%

23%

12%

2%

31%

23%

16%

1%

22%2%

71%12%24%41%NA

36%8%

105%61%6%9%29%10%6%38%34%22%8%

52%NA

15%15%39%46%7%8%

42%23%27%9%2%13%25%48%1%

15%

s:\Sve_proj\0001S5\025\dataval\xrf081199_2\Zinc Page 1 of 4

ZINC: Relative Percent Difference (RPD) Calculations for Primary vs. Duplicate SamplesXRF Results from Residential Areas in Omaha, Nebraska and Council Bluffs, Iowa

Units mg/Kg

Street Address916 South 41st621 South 32nd Avenue101 8 South 40th101 8 South 40th1006 South 40th1001 South 41st1001 South 41st4345 Mayberry4345 Mayberry4320 Marcy4320 Marcy4227 Mayberry4340 Mayberry4301 Barker4301 Barker431 7 Barker3710 Mason21 23 Locust Street221 6 Maple St.221 6 Maple St.2120 Binney1419Cady1421 Cady1421 Cady1911 Lothrop1922 Loth rop21 24 Maple1604 Willis3410 North 16th3410 North 16th181 6 Willis1608 Lake1608 Lake161 2 Lake St.1817Corby1817Corby201 2 Locust2120Wirt2215 Binney2215 Binney2211 Locust2211 Locust2202 Pinkney201 2 Emmet2003 Pinkney2003 Pinkney1821 Spencer1821 Spencer2115 Pinkney1625 Pinkney1625 Pinkney1907 Spencer1814 Pinkney1484 Pinkney

CityOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmaha

PrimarySample #018460186601885018920190101919019220195501961019720197401991020080202302028020400206002113022570226202272022890236802374023860239802404024190243602440024540246502465024700247302480024880250902527025310254402549025600256802589025930260602610026260266502671027110271402731


Primary Sample

ZincResult

181.9253.4

89.583.990.8

149.1122.688.871.073.4

573.2205.2181.0135.4256.0165.4163.393.0

186.483.4

1060.0250.6197.6416.881.4

2268.8193.7466.8360.4178.4

1440.0500.4500.4476.4229.8121.8405.6303.8559.2788.8371.4433.2187.377.1

465.282.6

429.6780.4182.6340.8414.0326.2118.5196.5

Zinc Prec62.775.229.7

U56.557.630.030.833.4

U52.533.837.462.839.2

J65.9

U35.2

U71.082.072.398.4

U410.070.949.089.767.2

250.051.251.250.972.436.1

100.045.353.663.3

100.048.370.6

U50.833.0

100.0170.071.046.3

J45.461.339.6

Dup Sample

ZincResult

240.0270.0

70.460.462.7

209.2111.8110.475.188.9

458.0151.7121.6203.9223.881.8

263.8129.9145.760.0

1280.0262.8203.3457.6141.5

2240.0195.3381.6304.2269.0

1800.0701.2709.2542.0281.692.4

409.6340.2611.2764.8406.4426.4237.858.1

440.482.6

577.2931.2203.1360.6124.6344.4172.6146.1

Zinc Prec36.978.1

U31.8

U35.658.853.1

U29.8

100.062.261.538.674.0

UJ38.663.864.931.3

240.042.838.247.932.597.436.794.841.739.684.5

140.057.752.336.8

U48.346.855.560.947.8

100.041.329.9

110.0U

52.168.938.745.7

J44.937.470.4


(RPD)

28%

6%

24%

33%

37%

34%

9%

22%6%

19%

22%30%39%40%13%68%47%33%25%33%19%5%3%9%

54%1%1%

20%17%41%22%33%35%13%20%27%1%

11%9%3%9%2%

24%28%5%0%

29%18%11%6%

107%5%

37%29%

s:\Sve_proj\000155\02S\data val\xrt081199_2\Zinc Page 2 of 4

ZINC: Relative Percent Difference (RPD) Calculations for Primary vs. Duplicate SamplesXRF Results from Residential Areas In Omaha, Nebraska and Council Bluffs, Iowa

Units mg/Kg

Street Address1473 Emmet1473 Emmet2224 Evans2101 Evans1 620 Evans1620 Evans2023 Spencer1807Corby21 18 Evans261 2 North 15th Street2612 North 15th StreetStreet2201 Locust2531 Florence2251 Florence2088 Parker Circle2088 Parker Circle251 4 North 17th Street1619 Pinkney21 97 Parker Circle2192 Parker Circle2192 Parker Circle161 9 Emmet3608 North 21st Street2022 North 18th Street625 Pierce625 Pierce1213 Pierce713 Williams620 Williams41 6 Williams610 Hickory610 Hickory814 Hickory707 Hickory813 Frances813 Frances625 Dorcas708 Dorcas715 Dorcas101 3 Hickory1123Castelar1123Castelar1210Castelar1006 Arbor822 Bancroft1402 Park Wild1402 Park Wild1 230 Park Wild1 230 Park Wild1254 Park Wild814 Forest814 Forest11 26 Frederick

CityOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmaha

PrimarySample*027340274102754027700279602806028110281402830028490285402862028700288602903029370294202958029690297202987029930300803027030380304603052030620307803097031000311603118031350315103168031730318703189032010320703224032290324103256032720328403290033050330803320033420334603362


Primary Sample

ZincResult

212.0238.2380.897.8

116.3314.0738.4241.4313.8386.8215.0

1220.0232.0244.2124.688.1

182.1277.4877.6130.387.695.9

509.6157.0

1049.6253.2166.3164.2447.6271.0597.2396.0233.2216.0

92.6308.8

87.487.4

976.0459.6

1220.01089.6318.4296.4157.6219.6214.4243.2224.2715.6531.2523.6104.3146.7

Zinc Prec37.3

J

48.1U

33.636.9

160.040.043.5

110.040.077.740.039.657.1

U

40.337.2

180.033.1

U

57.849.763.970.2

J36.432.449.787.851.443.139.973.2

U33.249.1

UJ180.0110.0220.0

63.887.878.229.834.735.540.880.360.349.750.932.734.5

Dup Sample

ZincResult

230.693.2

343.4140.486.9

305.8888.8185.9342.8434.8108.9

1240.0197.5152.3164.482.696.9

215.0988.8101.7103.856.5

460.4147.9

1 509.6118.290.1

102.5344.0352.0532.8364.2255.8331.4121.8398.4159.9192.2964.8624.0

1369.6899.2375.2356.8164.2183.9143.8149.2269.0703.2524.0300.089.398.1

Zinc Prec39.0

J

47.337.8

U

45.269.862.272.051.363.1

250.067.869.934.730.4

U

70.273.461.733.632.6

100.037.1

290.0J

U

60.083.648.9

120.082.474.344.136.276.036.5

J

64.955.966.9

160.044.838.761.057.270.956.044.1

150.0110.083.9

U

64.6


(RPD)8%

88%

10%

36%

29%

3%

18%

26%

9%

12%

66%

2%

16%

46%

28%

6%

61%

25%

12%

25%

17%

52%

10%

6%

36%

73%59%46%26%26%11%8%9%

42%27%25%59%75%1%

30%12%19%16%18%4%18%39%48%18%2%1%

54%15%40%

s:\Svo_proj\000155\02S\data val\xrf081199_2\Zinc Page 3 of 4

ZINC: Relative Percent Difference (RPO) Calculations for Primary vs. Duplicate SamplesXRF Results from Residential Areas In Omaha, Nebraska and Council Bluffs, Iowa

Units mg/Kg

Street Address151 7 Park Wild191 4 South 16th Street2302 South 6th Street2302 South 6th Street251 8 South 6th Street251 8 South 6th Street2410 South 6th1721 South 7th2025 South 6th2025 South 6th2021 South 6th1417 South 8th1713 South 8th1425 South 8th2002 South 7th Street2002 South 7th Street1314 South 9th1704 South 9th1716 South 9th301 1 South 9th301 1 South 9th231 5 South 8th1447 South 12th2003 South 8th2003 South 8th1215 South 10th911 Pierce911 Pierce720 Pierce2307 South 8th1953 South 11th1953 South 11th1938 South 11th Street1434 South 11th1222 South 12th131 7 South 12th131 3 South 12th131 3 South 12th1311 South 12th1 709 South 7th1450 South 12th2521 South 6th2521 South 6th1452 South 12th1711 South 12th141 3 South 5th141 3 South 5th1721 South 12th2702 South 12th2748 South 12th

CityOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmaha

PrimarySample #0337803391033970340603419034240350203518035360354103547035550355903575035980360203616036260363503652036600367003687037200372603776037790378403800038130383103839038440384603877038870389403899039100392503941039600396303982039960401504019040390406104062

DuplicateSample*0337903392033980340703420034250350103519035370354203548035560356003576035990360303617036270363603653036610367103688037210372703777037800378503801038140383203838038450384703878038880389503900039110392603942039610396403983039970401604020040400406104063

Primary Sample

ZincResult

235.4767.2495.6134.293.6

215.490.395.9

135.675.1

164.5201.9

82.4159.7127.859.7

245.4605.6124.9222.8140.3319.6468.0179.9145.9292.0428.0358.8566.084.9

215.4143.1585.2256.0

89.1656.0369.2212.8194.1122.5121.2125.984.1

151.0926.4568.4241.8233.8145.1349.0

Zinc Prec41.6

140.0110.038.8

U38.128.234.830.2

U69.572.1

U66.836.531.040.259.662.734.735.236.998.936.335.745.795.646.948.8

U75.562.252.441.4

U150.045.271.437.870.359.236.0

U35.165.3

120.082.184.737.843.7

Dup Sample

ZincResult

140.5834.4351.899.8

133.2213.2

89.987.9

117.268.9

247.8234.2141.5246.887.381.1

212.0583.6218.0183.297.8

248.2531.6117.788.9

268.2554.8314.0542.4148.4219.2116.4548.8202.5102.5451.2252.2271.0161.5192.9187.092.692.689.0

812.0604.4220.8267.8145.1381.8

Zinc Prec72.253.241.0

U38.273.0

UU

57.534.931.638.235.337.7

UU

65.7140.041.664.663.474.746.859.9

U88.750.188.0

110.036.139.034.7

120.075.233.852.878.240.669.341.635.4

U34.559.3

160.049.240.244.737.897.7


(RPD)

50%

8%

34%

29%

35%1%0%9%15%9%

40%15%53%43%38%30%15%4%54%20%36%25%13%42%49%8%26%13%4%

54%2%

21%6%

23%14%37%38%24%18%45%43%30%10%52%13%6%9%

14%0%9%

"U" indicates a non-detect at level presented in "Result1 column"J" indicates estimated concentration"UJ" indicates an estimated non-detect analyte concentration"NA" indicates not applicable

s:\Sve_proj\000155\02S\data val\xrf081199_2\Zinc Page 4 of 4

ARSENIC: Relative Percent Difference (RPD) Calculations for Primary vs. Duplicate SamplesXRF Results from Residential Areas In Omaha, Nebraska and Council Bluffs, Iowa

Units mg/Kg

Street Address21 02 South 8th Street1228 South 10th Street5223 Grand1458 South 11th1458 South 11th2613 Avenue G2739 Avenue D241 2 Avenue H2413Blondo2413Blondo2502 Burdette2610 Patrick261 4 Patrick2436 Parker2436 Parker2508 Parker2428 Seward2522 Erskine2527 Blondo2527 Blondo2527 Blondo2116 Binney2525 Maple2531 Maple2512Corby2512Corby2130 Binney Street2515 Binney Street2519 Binney Street221 6 N. 25th Street221 6 N. 25th Street2906 N. 25th Street261 1 Parker2416 Binney191 2 North 26th Street271 5 North 26th2620 Grant1775 South 9th281 6 North 26th131 5 South 10th923 South 8th3719 Mason3719 Mason525 South 31st Avenue2540 Avenue D2431 Avenue D2546 Avenue G271 6 Avenue G1013Castelar833 South 41st91 2 South 41st1020 South 41st1 020 South 41 st1022 South 41st Street91 6 South 41st

CityOmahaOmahaOmahaOmahaOmahaCouncil BluffsCouncil BluffsCouncil BluffsOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaCouncil BluffsCouncil BluffsCouncil BluffsCouncil BluffsOmahaOmahaOmahaOmahaOmahaOmahaOmaha

PrimarySample #00529005700071600882008880096500983010010105901065010800109801115011180112601133011420115801179011820118701225012580126301280012840131301332013450136001365013800151301538015540156701581015950160501620016540167001675016870171001725017390174401763017800179601810018100183301846


Primary Sample

ArsenicResult

85.890.095.867.942.849.243.154.162.160.154.058.994.263.342.885.985.963.854.199.144.749.858.964.9

123.357.343.985.6

119.773.970.582.167.159.776.577.167.654.859.166.850.452.568.727.456.654.027.048.4

349.427.055.433.229.422.770.8

ArsenicPrec

Uu

33.6UUuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu

40uuuuuu

Dup Sample

ArsenicResult

109.290.667.984.655.840.542.440.862.177.168.678.676.648.856.168.752.649.466.473.643.958.656.949.8

150.064.848.167.688.595.372.8

108.148.061.479.581.960.363.857.667.929.729.7

106.448.333.430.447.426.4

373.447.758.247.347.342.051.3

ArsenicPrec

UU

42UUUUUUUUUUUUuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu

45.1uuuuuu


(RPD)

NA

NA

34%

NA

NA

NA

NA

NA

NA

NA

NA

NA

NA

NA

NA

NA

NA

NA

NA

NA

NA

NA

NA

NA

NA

NA

NA

NA

NA

NA

NA

NA

NA

NANA

NA

NA

NANA

NA

NA

NA

NA

NA

NA

NA

NA

NA

7%

55%

NA

NA

NA

NA

NA

s:\Sva_proj\000155\025\dataval\xrf031199_2\Arsenic Page 1 of 4

ARSENIC: Relative Percent Difference (RPD) Calculations for Primary vs. Duplicate SamplesXRF Results from Residential Areas in Omaha, Nebraska and Council Bluffs, Iowa

Units mg/Kg

Street Address621 South 32nd Avenue1018South401h1 01 8 South 40th1 006 South 40th1001 South 41st1001 South 41st4345 Mayberry4345 Mayberry4320 Marcy4320 Marcy4227 Mayberry4340 Mayberry4301 Barker4301 Barker431 7 Barker3710 Mason2123 Locust Street221 6 Maple St.221 6 Maple St.2120 Binney1419Cady1421 Cady1421 Cady1911 Lothrop1922Lothrop21 24 Maple1604 Willis3410 North 16th3410 North 16th181 6 Willis1608 Lake1608 Lake1612LakeSt1817Corby1817Corby201 2 Locust2120Wirt2215 Binney221 5 Binney221 1 Locust2211 Locust2202 Pinkney2012 Emmet2003 Pinkney2003 Pinkney1821 Spencer1821 Spencer2115 Pinkney1625 Pinkney1625 Pinkney1907 Spencer1814 Pinkney1484 Pinkney1473 Emmet1 473 Emmet


PrimarySample*

0186601885018920190101919

0192201955019610197201974019910200802023020280204002060021130225702262022720228902368023740238602398024040241902436024400245402465024650247002473024800248802509025270253102544025490256002568025890259302606026100262602665026710271102714027310273402741

DuplicateSample #

01867018860189301903019200192301956019620197301978019920200902024020320204102061021140225802263022730229002369023750238702399024050242002437024410245502466024660247102474024810248902510025280253202545025540256102569025900259402607026110262702666027070271202715027320273502740

Primary Sample

ArsenicResult

60.845.848.146.368.828.124.925.243.945.636.236.052.437.132.471.668.936.298.489.485.962.958.252.4

180.066.655.961.253.490.151.651.651.374.330.384.047.857.672.389.950.460.441.857.926.878.9

134.984.960.9

120.0

51.656.141.138.146.0

ArsenicPrec

U20.4

UU

40.3UUUUUUUUUUUUU

38.4UUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUU

25.9

Dup Sample

ArsenicResult

61.862.325.735.143.049.443.343.930.571.761.557.331.860.653.950.980.964.867.3

150.052.938.437.529.8

102.837.984.836.932.467.8

106.470.449.840.954.651.048.461.568.151.682.236.324.096.948.649.491.451.856.133.950.434.270.172.755.8

ArsenicPrec

U32.2

UU

22.6UUU

17.6UUUUUU

29.746.3

U21.6

UUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUU

25.9U


(RPD)

NA31%NANA

46%NANANA

36%NANANANANANA

34%16%NA

38%NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA

62%19%

s:\Sve_proj\000155\025\data val\xrf081199_2Wsenic Page 2 of 4


Units mg/Kg

Street Address2224 Evans2101 Evans1 620 Evans1620 Evans2023 Spencer1807Corby2118 Evans261 2 North 15th Street261 2 North 15th StreetStreet2201 Locust2531 Florence2251 Florence2088 Parker Circle2088 Parker Circle251 4 North 17th Street1619 Pinkney21 97 Parker Circle2192 Parker Circle21 92 Parker Circle1619 Emmet3608 North 21st Street2022 North 18th Street625 Pierce625 Pierce1 21 3 Pierce713 Williams620 Williams416 Williams610 Hickory610 Hickory81 4 Hickory707 Hickory813 Frances813 Frances625 Dorcas708 Dorcas715 Dorcas101 3 Hickory1123Castelar1123Castelar1210Castelar1006 Arbor822 Bancroft1402 Park Wild1402 Park Wild1230 Park Wild1230 Park Wild1254 Park Wild81 4 Forest81 4 Forest1126 Frederick151 7 Park Wild191 4 South 16th Street2302 South 6th Street


PrimarySample*02754027700279602806028110281402830028490285402862028700288602903029370294202958029690297202987029930300803027030380304603052030620307803097031000311603118031350315103168031730318703189032010320703224032290324103256032720328403290033050330803320033420334603362033780339103397


Primary Sample

ArsenicResult

42.257.927.335.4

165.046.237.2

105.940.799.138.839.251.948.037.735.1

165.027.952.944.653.451.891.435.734.124.845.696.650.943.738.468.757.025.745.952.571.3

108.674.336.360.671.628.336.657.839.682.5

105.169.052.625.530.639.457.384.1

ArsenicPrec

UuUuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu

23.5uuuuuuuuuu

Dup Sample

ArsenicResult

44.333.248.443.9

105.362.340.861.267.2

180.060.867.934.125.861.462.1

124.853.730.825.776.931.5

165.057.154.448.064.162.690.859.363.646.530.839.434.228.245.677.445.355.135.339.452.452.269.854.049.9

165.0102.578.152.556.464.935.338.8

ArsenicPrec

UUuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu


(RPD)

NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA19%NANANANANANANANANANA

s-\Sve_proj\000155\025\data val\xrfOB1199_2Wsenic Page 3 of 4


Units mg/Kg

Street Address2302 South 6th Street251 8 South 6th Street251 8 South 6th Street2410 South 6th1721 South 7th2025 South 6th2025 South 6th2021 South 6th141 7 South 8th1 71 3 South 8th1 425 South 8th2002 South 7th Street2002 South 7th Street131 4 South 9th1704 South 9th171 6 South 9th301 1 South 9th301 1 South 9th231 5 South 8th1447 South 12th2003 South 8th2003 South 8th1215 South 10th911 Pierce911 Pierce720 Pierce2307 South 8th1953 South 11th1953 South 11th1938 South 11th Street1434 South 11th1222 South 12th1317 South 12th131 3 South 12th1313 South 12th1311 South 12th1709 South 7th1450 South 12th2521 South 6th2521 South 6th1452 South 12th1711 South 12th141 3 South 5th141 3 South 5th1721 South 12th2702 South 12th2748 South 12th

CityOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmahaOmaha

PrimarySample #0340603419034240350203518035360354103547035550355903575035980360203616036260363503652036600367003687037200372603776037790378403800038130383103839038440384603877038870389403899039100392503941039600396303982039960401504019040390406104062


Primary Sample

ArsenicResult

30.851.928.723.430.432.844.360.061.951.069.930.825.242.363.061.636.433.9

110.667.631.228.843.588.154.645.851.466.460.148.936.950.786.640.965.734.766.860.029.452.132.675.865.159.975.635.746.5

ArsenicPrec

UUUUUUU

39.3UUUUUUUUUU

26.1UUUUUUUUUUUUUUUUU

UUUUUUUUUUU

Dup Sample

ArsenicResult

56.330.051.951.650.660.329.657.135.330.642.454.344.758.8

103.541.366.962.6

167.536.354.449.475.058.987.377.333.339.427.880.762.328.548.970.838.660.839.436.251.430.453.7

108.034.730.443.735.780.6

ArsenicPrec

U

U

U

U

U

U

U

18.6U

U

26.4U

U

U

U

U

U

U

55.3UU

U

U

U

U

U

U

U

U

U

U

U

U

UUU

UU

U

U

U

U

U

U

U

U

U


(RPD)

NA

NA

NA

NA

NA

NA

NA

5%

NA

NA

49%

NA

NA

NA

NA

NA

NA

NA

41%

NA

NA

NA

NA

NA

NA

NA

NA

NA

NA

NA

NA

NA

NA

NANANA

NA

NA

NA

NA

NA

NA

NA

NA

NA

NA

NA

"U" indicates a non-detect at level presented in "Result" column"NA" indicates not applicable

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DATA VALIDATION FOR XRF DATA 1999