Available from:

Environmental Reference Materials, Inc.

P.O. Box 12527

Research Triangle Park, N.C. 27709

1-888-645-7645 (U.S. only)

FAX: 1-919-544-1669

These lead paint program testing standards are certified reference materials that have been developed to assist laboratories in meeting the quality control requirements of the American Industrial Hygiene Association’s (AIHA) Environmental Lead Laboratory Accreditation Program (ELLAP). The ELLAP accredits testing laboratories under the U.S. EPA’s National Lead Laboratory Accreditation Program.

They can be used as laboratory control standards or as spiking materials for paint, soil and wipes. These standards can also be used as practice samples for laboratories participating in the AIHA’s Environmental Lead Proficiency Analytical Testing Program (ELPAT). All products are certified for Lead content. In addition, products LCS-301 and 401 are certified for up to 15 additional elements. A summary of product information is presented below and complete certificates of analysis follow. Certificates of analysis for exhausted products and lots available on request. They can be viewed at www.leadpaint.150m.com/Lead Paint StandardsExhausted1.htm and www.leadpaint.150m.com/Lead Paint StandardsExhausted2.htm. To see our line of oil proficiency and quality control testing standards go to www.leadpaint.150m.com/Oil PT Standards.htm.

Product No. and Name Unit Size Lead Content, ppm Unit Price $ NIST Traceable

ERM-6e Lead Free Paint 50g <8 $160 yes

ERM-7a Lead Free Soil 50g <4 $160 yes

ERM-8e Low Level Lead in Paint 50g 626 $190 yes

ERM-9a Lead Paint in Soil 50g 484 $160 yes

ERM-12f Lead Paint in Soil 50g 5189 $190 yes

LCS-301 Northeast Urban Soil 50g 547 $190 yes

LCS-401 Blended Paints from 50g 4430 $190 yes

Public Buildings

Revisions to certificates and products: For LCS-401, results for Mercury determined by EPA Method 7471A were added (4-3-06). Lead results by EPA Method 3052 were upgraded to NIST traceable (4-3-06). ERM-8b added to replace ERM-8a and LCS-402 (3-27-07). ERM-12a added to replace ERM-11 and LCS-302 (5-24-07). Gravimetric values for Lead added to certificates for ERM-12a (6-13-07) and 8b (12-12-07). All products shown in table above are available. ERM-7 and 9 expiration date extended (1-9-08). ERM-8b text corrected to state that mixture of paints and not paint and soil used to prepare product (5-31-08—since this is an editorial change, a new revision number was not assigned). ERM-8c added to replace ERM-8b (5-27-08). ERM-12b added to replace ERM-12a (8-8-08). ERM-6e added to replace ERM-6d (4-23-09). ERM-8d added to replace ERM-8c and ERM-12c added to replace ERM-12b (7-8-09). Certificate for ERM-8a restored to list (7-8-09). ERM-12d added to replace ERM-12c (3-29-10). ERM-8e added to replace ERM-8d (11-30-10). ERM-12e added to replace ERM-12d (1-28-11). ERM-7 and 9 are now exhausted. Expiration dates for ERM-7a, 9a, LCS-301 and LCS-402 extended. ERM-12f added to replace ERM-12e. (11-22-11). Expiration dates for all exhausted lots extended. All exhausted lots added to website. Minor editorial changes made to certificates for exhausted lots. (12-20-11).

ENVIRONMENTAL REFERENCE MATERIALS, INC.

P.O. BOX12527 RESEARCH TRIANGLE PARK, N.C. 27709 1-919-544-1669 1-888-OIL-SOIL

CERTIFICATE OF ANALYSIS

LEAD FREE PAINT

CAT. NO. ERM-6e

LOT NO. 6-09-1

DATE OF MANUFACTURE: 4-22-09

EXPIRATION DATE: 4-22-19

CERTIFIED VALUE FOR LEAD: <8 ± 0 mg/kg

DESCRIPTION AND INTENDED USE:

Virgin latex and enamel house paints were evaporated to dryness, milled, sieved to pass an 850-micron sieve and blended. The product was packaged sequentially in 50g units in glass jars. Units from the beginning, middle and end of the packaging sequence were analyzed for Lead using EPA Method 6010C, Inductively Coupled Plasma-Atomic Emission Spectroscopy after digestion by EPA Method 3050B, Acid Digestion of Sediments, Sludges and Soils. A two-way ANOVA of the resulting data showed that the within and between bottle analyses could be considered equivalent. All of the results were below the method detection limit of 8mg/kg. Therefore, the product is considered homogeneous with respect to Lead. The results of the 9 determinations were pooled and the 95% prediction interval calculated. The certified value is the mean value of these determinations ± the uncertainty for the 95% prediction interval, which in this case, is <8 ± 0 mg/kg. Laboratories should be able to obtain similar results using this method and a 0.5g sample size. Use of smaller or larger sample sizes will potentially result in different detection limits and the acceptance range may need to be changed accordingly. This material was also analyzed for Lead along with NIST SRMs 2709, San Joaquin Soil and 2586, Trace Elements in Soil Containing Lead from Paint and the NIST traceable CRM, RTI LCS-401, Blended Paints from Public Buildings. The results for single determinations for Lead in these materials were for SRM 2709 10mg/kg, 77% of the median of the information values for Lead of 12-18mg/kg; for SRM 2586 420mg/kg, 97% of the certified value for Lead of 432mg/kg and for LCS-401, 4711mg/kg, 106% of the certified value for Lead of 4430mg/kg. The certified value for Lead in SRM 2709 is 18.9 mg/kg, but is based on a total digestion using hydrofluoric as well as nitric and hydrochloric acids. Information values presented from digestions by Method 3050, an incomplete dissolution procedure using only nitric and hydrochloric acids, showed a range of 12-18 mg/kg with a median value of 13. Because this SRM’s certified and information values are also close to typical detection limits for soils, the results for ERM-6e can be considered NIST traceable for Lead for this SRM. Because of the close agreement with the certified values for the SRMs and LCS-401, the results for ERM-6e can be considered NIST traceable for Lead.

This material is intended to be used as a quality control standard in performing tests for Lead in paint by EPA Methods 6010B and 7420 and ASTM Methods E1613-94 and D3335-85a (1994). Tests for stability will be performed as necessary. Any changes in the certified value outside the 95% prediction interval will be reported to purchasers of this product. The product does not require any additional homogenization.

Approved by:

________________________ ___________

Alvia Gaskill, Jr., President Date

ENVIRONMENTAL REFERENCE MATERIALS, INC.

P.O. BOX 12527 RESEARCH TRIANGLE PARK, N.C. 27709 1-919-544-1669 1-888-OIL-SOIL

CERTIFICATE OF ANALYSIS

LEAD FREE SOIL

CAT. NO. ERM-7a

LOT NO. 7-02-1

DATE OF MANUFACTURE: 10-8-02

EXPIRATION DATE: 11-22-21

REVISION 2: 11-22-11

CERTIFIED VALUE FOR LEAD: <4.2 mg/kg

DESCRIPTION AND INTENDED USE:

A clean clay soil from land under development in an industrial park was sieved to pass a 177-micron sieve and blended. The product was packaged sequentially in 50 g units in glass jars. Units from the beginning, middle and end of the packaging sequence were analyzed in triplicate for Lead using EPA Method 6010A, Inductively Coupled Plasma-Atomic Emission Spectroscopy after digestion by EPA Method 3050A, Acid Digestion of Sediments, Sludges and Soils. A two-way ANOVA of the resulting data showed that the within and between jar analyses could be considered equivalent. All of the results were below the method detection limit of 4.2 mg/kg. Therefore, the product is considered homogeneous with respect to Lead. The results of the 14 determinations were pooled and the 95% prediction interval calculated. The certified value is the mean value of these determinations ± the uncertainty for the 95% prediction interval, which in this case, is zero. Laboratories should be able to obtain similar results using this method and a 0.5 g sample size. Use of smaller or larger sample sizes will potentially result in different detection limits and the acceptance range may need to be changed accordingly. This material was also analyzed for Lead along with NIST SRM 2709, San Joaquin Soil. The results of three determinations were all below the detection limit of 4.2 mg/kg. The certified value for Lead in this SRM is 18.9 mg/kg, but is based on a total digestion using hydrofluoric as well as nitric and hydrochloric acids. Information values presented from digestions by Method 3050, an incomplete dissolution procedure using only nitric and hydrochloric acids, showed a range of 12-18 mg/kg. Because the SRM’s certified and information values are also close to typical detection limits for soils, the results for ERM-7a can be considered NIST traceable for Lead.

This material is intended to be used as a quality control standard in performing tests for lead in soil by EPA Methods 6010A and 7420 and ASTM Method E1613-94. Tests for stability will be performed as necessary. Any changes in the certified value outside the 95% prediction interval will be reported to purchasers of this product. The product does not require any additional homogenization and there are no special storage requirements.

Approved by:

________________________ ___________

Alvia Gaskill, Jr., President Date

ENVIRONMENTAL REFERENCE MATERIALS, INC.

P.O. BOX 12527 RESEARCH TRIANGLE PARK, N.C. 27709 1-919-544-1669 1-888-OIL-SOIL

CERTIFICATE OF ANALYSIS

LOW LEVEL LEAD IN PAINT

CAT. NO. ERM-8e

LOT NO. 8-10-1

DATE OF MANUFACTURE: 11-17-10

EXPIRATION DATE: 11-17-20

CERTIFIED VALUE FOR LEAD: 626.2 ± 33.7 mg/kg

GRAVIMETRIC VALUE FOR LEAD: 600.8 mg/kg

DESCRIPTION AND INTENDED USE:

Lead containing paint from public buildings undergoing abatement was ball-milled, sieved to pass a 75-micron sieve and blended with Lead free paint (<150microns) in a rotating blender. The product was packaged sequentially in 50g units. Samples from the beginning, middle and end of the packaging sequence were analyzed for Lead using EPA Method 7420, Lead (Atomic Absorption, Direct Aspiration) after digestion by EPA Method 3050B, Acid Digestion of Sediments, Sludges and Soils. A two-way ANOVA of the resulting data from Method 7420 showed that the within and between bottle analyses could be considered equivalent. The CV of the pooled data from Method 7420 was 2.4%. Based on these analyses, the product was judged to be homogeneous with respect to Lead. The results of the 15 determinations were pooled and the 95% prediction interval calculated. The certified value for Lead is the mean value of these determinations ± the uncertainty for the 95% prediction interval. Laboratories should be able to obtain results for Lead within this interval using this method and a 0.5g sample size. This material was also analyzed for Lead along with NIST SRM 2582, Powdered Paint. The mean of the results of three determinations for Lead in SRM 2582 by Method 7420 was 193.0mg/kg, 92.4% of the certified value of 208.8mg/kg. Because of the agreement with the certified value for the SRM, the results for ERM-8e can be considered NIST traceable for Lead. Because this product was prepared by blending together paints of known content, a gravimetric expected value can also be calculated. The certified value is 4.2% higher than the gravimetric value of 600.8mg/kg.

This material is intended for use as a quality control standard in performing tests for Lead in paint by EPA Methods 6010 and 7420 and ASTM Method E1613-94. Results also apply to digestions performed using EPA Methods 3050A and 3051. Tests for stability will be performed as necessary. Any changes in the certified value outside the 95% prediction interval will be reported to purchasers of this product. The product does not require any additional homogenization and there are no special storage requirements.

Approved by:

________________________ ___________

Alvia Gaskill, Jr., President Date

ENVIRONMENTAL REFERENCE MATERIALS, INC.

P.O. BOX 12527 RESEARCH TRIANGLE PARK, N.C. 27709 1-919-544-1669 1-888-OIL-SOIL

CERTIFICATE OF ANALYSIS

LEAD PAINT IN SOIL

CAT. NO. ERM-9a

LOT NO. 9-02-1

DATE OF MANUFACTURE: 10-8-02

EXPIRATION DATE: 11-22-21

REVISION 2: 11-22-11

CERTIFIED VALUE FOR LEAD: 483.6 ± 48.9 mg/kg

DESCRIPTION AND INTENDED USE:

Soil containing lead paint was sieved to pass a 177-micron sieve and blended with clean base soil. The product was packaged sequentially in 50 g units in glass jars. Units from the beginning, middle and end of the packaging sequence were analyzed in triplicate for Lead using EPA Method 6010A, Inductively Coupled Plasma-Atomic Emission Spectroscopy after digestion by EPA Method 3050A, Acid Digestion of Sediments, Sludges and Soils. A two-way ANOVA of the resulting data showed that the within and between jar analyses could be considered equivalent. The CV of the pooled data from these tests was 4.5%. Based on these analyses, the product was judged to be homogeneous with respect to Lead. The results of the 14 determinations were pooled and the 95% prediction interval calculated. The certified value for Lead is the mean value of these determinations ± the uncertainty for the 95% prediction interval. Laboratories should be able to obtain results for Lead within this interval using this method and a 0.5 g sample size. This material was also analyzed along with NIST SRM 2586, Trace Elements in Soil Containing Lead from Paint. The mean of the results of three determinations was 401.9 mg/kg, 93% of the certified value for Lead of 432 mg/kg. Because of the close agreement with the certified value for the SRM, the results for ERM-9a can be considered NIST traceable for Lead.

This material is intended to be used as a quality control standard in performing tests for Lead in soil by EPA Methods 6010A and 7420 and ASTM Method E1613-94. Tests for stability will be performed as necessary. Any changes in the certified value outside the 95% prediction interval will be reported to purchasers of this product. The product does not require any additional homogenization and there are no special storage requirements.

Approved by:

________________________ ___________

Alvia Gaskill, Jr., President Date

ENVIRONMENTAL REFERENCE MATERIALS, INC.

P.O. BOX 12527 RESEARCH TRIANGLE PARK, N.C. 27709 1-919-544-1669 1-888-OIL-SOIL

CERTIFICATE OF ANALYSIS

LEAD PAINT IN SOIL

CAT. NO. ERM-12f

LOT NO. 12-11-2

DATE OF MANUFACTURE: 9-29-11

EXPIRATION DATE: 9-29-21

CERTIFIED VALUE FOR LEAD: 5189 ± 386 mg/kg

GRAVIMETRIC VALUE FOR LEAD: 5599 ± 4 mg/kg

DESCRIPTION AND INTENDED USE:

Lead paint, lead paint containing soil and clean base soil, all of which passed a 100-micron sieve were blended. Units from the beginning, middle and end of the packaging sequence were analyzed for Lead using EPA Method 7420, Lead (Atomic Absorption, Direct Aspiration) after digestion by EPA Method 3050B, Acid Digestion of Sediments, Sludges and Soils. A two-way ANOVA of the resulting data showed that the between and within unit analyses could be considered equivalent. The CV of the pooled data from these tests was 3.1%. Based on these analyses, the product was judged to be homogeneous with respect to Lead. The results of the 9 determinations were pooled and the 95% prediction interval calculated. The certified value for Lead is the mean value of these determinations ± the uncertainty for the 95% prediction interval. Laboratories should be able to obtain results for Lead within this interval using this method and a 0.5g sample size. This material was also analyzed along with NIST SRM 2586, Trace Elements in Soil Containing Lead from Paint. The mean of the results of a single determination for Lead in SRM 2586 was 400mg/kg, 92.6% of the certified value for Lead of 432mg/kg. Because of the agreement with the certified value for the SRM, the results for ERM-12f can be considered NIST traceable for Lead. Because this product was prepared by blending together soil and paint of known Lead content, a gravimetric expected value can also be calculated. The gravimetric value, 5599mg/kg is just outside the 95% prediction interval. The certified value is 7.3% lower than the gravimetric value.

This material is intended for use as a quality control standard in performing tests for Lead in soil by EPA Methods 6010 and 7420 and ASTM Method E1613-94. Results also apply to digestions performed using EPA Methods 3050A and 3051. Tests for stability will be performed as necessary. Any changes in the certified value outside the 95% prediction interval will be reported to purchasers of this product. The product does not require any additional homogenization and there are no special storage requirements.

Approved by:

________________________ ___________

Alvia Gaskill, Jr., President Date

RESEARCH TRIANGLE INSTITUTE

P.O. BOX 12194 RESEARCH TRIANGLE PARK, N.C. 27709-2194 1-919-541-6883

CERTIFICATE OF ANALYSIS

NORTHEAST URBAN SOIL

CAT. NO. LCS-301

LOT NO. 301-98-1

DATE OF MANUFACTURE: 5-98

EXPIRATION DATE: 11-22-21

REVISION 2: 11-22-11

CERTIFIED VALUE FOR LEAD: 547.1 ± 41.2 mg/kg

DESCRIPTION AND INTENDED USE:

The material used in this reference material was prepared according to procedures developed and used by Research Triangle Institute (RTI) for its preparation of Environmental Lead Proficiency Analytical Testing (ELPAT) materials for the American Industrial Hygiene Association and also Standard Operating Procedures for Preparation of Lead in Paint and Lead in Dust prepared for the U.S. EPA (EPA 600/R-93/235, NTIS #PB94-141165; EPA 600/R-94/132, NTIS #PB95-174090; and EPA 600/R-94/146, NTIS #PB95-190427).

Soil containing lead paint from drip lines around pre-1978 houses was ball-milled, sieved to pass a 75µ sieve and blended in a V shell mixer. The product was packaged sequentially in 50 g units in glass bottles. Around 10% of all units from the beginning, middle and end of the packaging sequence were analyzed in duplicate for Lead using EPA Method 6010B, Inductively Coupled Plasma-Atomic Emission Spectroscopy after digestion by EPA Method 3050A, Acid Digestion of Sediments, Sludges and Soils and EPA Method 3051, Microwave Assisted Acid Digestion of Sediments, Sludges, Soils and Oils. A two-way ANOVA of the resulting data showed that the within and between bottle analyses could be considered equivalent. Additional statistical analyses showed the Method 3050A and 3051 data could be considered equivalent. The CV of the pooled data from these tests was 3.7%. Based on these analyses, the product was judged to be homogeneous for Lead. The results of the 70 determinations were pooled and the 95% prediction interval calculated. The certified value for Lead is the mean value of these determinations ± the uncertainty for the 95% prediction interval. Laboratories should be able to obtain results for Lead within this interval using this method and a 0.5 g sample size. This material was also analyzed along with NIST SRM 2704, Buffalo River Sediment. The mean of the results of six determinations was 163 mg/kg, 101% of the certified value for Lead of 161 mg/kg. Because of the close agreement with the certified value for the SRM, the results for LCS-301 can be considered NIST traceable for Lead. Results for additional NIST and non-NIST traceable elements are given on the following pages.

This material is intended to be used as a quality control standard in performing tests for Lead and other elements in soil by EPA Methods 6010B and 7420 and ASTM Method E1613-94. Tests for stability will be performed as necessary. Any changes in the certified value outside the 95% prediction interval will be reported to purchasers of this product. The product does not require any additional homogenization and there are no special storage requirements.

Approved by:

__________________________________________ ___________

William F. Gutknecht, Research Triangle Institute Date

Results for additional NIST traceable elements in LCS-301

by pooling data from Methods 3050A and 3051*

Pooled Mean value, ±Uncertainty,

Element N data CV mg/kg 95% P.I., mg/kg

Aluminum 70 8.5% 9474 1613

Barium 70 3.9% 93.3 7.3

Cadmium 70 0% <1 0

Chromium 70 9.3% 16.2 3.0

Copper 70 13% 19.9 5.2

Iron 70 8.1% 11631 1918

Magnesium 70 4.7% 2838 268

Manganese 70 6.0% 228.7 27.4

Nickel 70 8.5% 11.7 2.0

Strontium 70 14.7% 19.7 5.8

Vanadium 70 10.2% 22.3 4.6

Zinc 70 4.5% 137.5 12.7

*All product preparation and testing identical to that for Lead on cover page of this certificate except as noted. Within/between bottle analyses in agreement, Method 3050A/3051 data determined to be equivalent and product judged homogeneous for all elements shown except Copper and Strontium. N = number of determinations. P.I. = prediction interval.

Results for non-NIST traceable elements in LCS-301

by pooling data from Methods 3050A and 3051*

Pooled Mean value, ±Uncertainty,

Element N data CV mg/kg 95% P.I., mg/kg

Boron 70 16.2% 13.0 4.2

Beryllium 70 14.0% 1.4 0.4

Molybdenum 70 0% <10 0

*All product preparation and testing identical to that for Lead on cover page of this certificate except as noted. Within/between bottle analyses in agreement, Method 3050A/3051 data determined to be equivalent and product judged homogeneous for all elements shown except Boron and Beryllium. N = number of determinations. P.I. = prediction interval.

Results for NIST traceable elements

in LCS-301 by modified Method 3052 only*

Pooled Mean value, ±Uncertainty,

Element N data CV mg/kg 95% P.I., mg/kg

Aluminum 35 1.8% 50300 1888

Barium 35 3.2% 442.8 29.0

Cadmium 35 0% <5 0

Chromium 35 12.3% 36.5 9.3

Copper 35 36.0% 21.1 15.6

Iron 35 2.6% 19646 1046

Lead 35 7.3% 552.5 83.4

Magnesium 35 2.7% 4606 254

Manganese 35 2.4% 441.9 22.2

Nickel 35 35.4% 19.2 14.0

Strontium 35 2.7% 140.5 7.8

Vanadium 35 9.2% 50.1 9.5

Zinc 35 7.3% 152.2 22.9

*All product preparation and testing identical to that for Lead on cover page of this certificate except as noted. Modified Method 3052, based on EPA Method 3052, Microwave Assisted Acid Digestion of Siliceous and Organically Based Matrices, is a microwave-assisted total digestion procedure in which the samples were first digested in a mixture of concentrated nitric acid and 49% hydrofluoric acid followed by additional digestion with concentrated hydrochloric and 49% hydrofluoric acids and on cooling, addition of boric and hydrochloric acids. For details of this procedure, contact manufacturer. Product judged homogeneous for all elements shown except for Chromium, Copper and Nickel. N = number of determinations. P.I. = prediction interval.

Results for non-NIST traceable elements

in LCS-301 by modified Method 3052 only*

Pooled Mean value, ±Uncertainty,

Element N data CV mg/kg 95% P.I., mg/kg

Beryllium 35 30% 3.3 2.1

Molybdenum 35 0% <40 0

*Same footnotes as in previous table, except Beryllium only element not homogeneous.

NIST traceability for LCS-301 vs. SRM 2704

using pooled means for Methods 3050A and 3051*

Mean value, Certified value

Element N mg/kg mg/kg % of SRM value

Aluminum 6 11850 61110 19

Barium 6 87.9 414 21

Cadmium 6 3.70 3.45 107

Chromium 6 81.4 135 60

Copper 6 75.5 98.6 77

Iron 6 30350 41100 74

Magnesium 6 9022 12000 75

Manganese 6 489 555 88

Nickel 6 39.0 44.1 89

Strontium 6 34.5 130 27

Vanadium 6 21.7 95 23

Zinc 6 413 438 94

*Low recoveries for Aluminum, Barium, Strontium and Vanadium not unexpected, since NIST SRM values based on total digestion and 3050A/3051 results based on partial digestion.

NIST traceability for LCS-301

vs. SRM 2704 for modified Method 3052

Mean value, Certified value

Element N mg/kg mg/kg % of SRM value

Aluminum 3 59767 61110 98

Barium 3 402 414 97

Cadmium 3 5.30 3.45 154

Chromium 3 121 135 90

Copper 3 76 98.6 77

Iron 3 39567 41100 96

Lead 3 149 161 93

Magnesium 3 11933 12000 99

Manganese 3 539 555 97

Nickel 3 44.4 44.1 101

Strontium 3 126 130 97

Vanadium 3 94.1 95 99

Zinc 3 400 438 91

RESEARCH TRIANGLE INSTITUTE

P.O. BOX 12194 RESEARCH TRIANGLE PARK, N.C. 27709-2194 1-919-541-6883

CERTIFICATE OF ANALYSIS

BLENDED PAINTS FROM PUBLIC BUILDINGS

CAT. NO. LCS-401

LOT NO. 401-98-1

DATE OF MANUFACTURE: 5-98

EXPIRATION DATE: 11-16-21

REVISION 3: 11-16-11

CERTIFIED VALUE FOR LEAD: 4430 ± 266 mg/kg

DESCRIPTION AND INTENDED USE:

Lead-containing paint from a hospital undergoing abatement was ball-milled, sieved to pass a 75µ sieve and blended in a V shell mixer. The product was packaged sequentially in 50 g units in glass bottles. Around 5% of all units from the beginning, middle and end of the packaging sequence were analyzed in duplicate for Lead using EPA Method 6010B, Inductively Coupled Plasma-Atomic Emission Spectroscopy after digestion by EPA Method 3050A, Acid Digestion of Sediments, Sludges and Soils and EPA Method 3051, Microwave Assisted Acid Digestion of Sediments, Sludges, Soils and Oils. A two-way ANOVA of the resulting data showed that the within and between bottle analyses could be considered equivalent. Additional statistical analyses showed the Method 3050A and 3051 data could be considered equivalent. The CV of the pooled data from these tests was 2.9%. Based on these analyses, the product was judged to be homogeneous for Lead. The results of the 34 determinations were pooled and the 95% prediction interval calculated. The certified value for Lead is the mean value of these determinations ± the uncertainty for the 95% prediction interval. Laboratories should be able to obtain results for Lead within this interval using this method and a 0.5 g sample size. This material was also analyzed along with NIST SRM 1579, Lead Paint. The mean of the results of a single determination was 11.00%, 93% of the certified value for Lead of 11.87%. Because of the close agreement with the certified value for the SRM, the results for LCS-401 can be considered NIST traceable for Lead. Results for additional NIST and non-NIST traceable elements are given on the following pages.

This material is intended to be used as a quality control standard in performing tests for Lead and other elements in paint by EPA Methods 6010B and 7420 and ASTM Method E1613-94. Tests for stability will be performed as necessary. Any changes in the certified value outside the 95% prediction interval will be reported to purchasers of this product. The product does not require any additional homogenization and there are no special storage requirements.

Approved by:

__________________________________________ ___________

William F. Gutknecht, Research Triangle Institute Date

Results for non-NIST traceable elements in LCS-401

by pooling data from Methods 3050A and 3051*

Pooled Mean value, ±Uncertainty,

Element N data CV mg/kg 95% P.I., mg/kg

Beryllium 34 0% <1 0

Cadmium 34 9.3% 16.2 3.1

Chromium 34 8.3% 72.3 12.4

Copper 34 7.9% 13.3 2.3

Manganese 34 4.4% 137.0 12.6

Molybdenum 34 0% <15 0

Nickel 34 5.9 79.1 9.7

Vanadium 34 4.5% 7.6 0.6

*All product preparation and testing identical to that for Lead on cover page of this certificate except as noted. Within/between bottle analyses in agreement, Method 3050A/3051 data determined to be equivalent and product judged homogeneous for all elements shown. N = number of determinations. P.I. = prediction interval.

Results for non-NIST traceable elements

in LCS-401 by Method 3050A only*

Pooled Mean value, ±Uncertainty,

Element N data CV mg/kg 95% P.I., mg/kg

Aluminum 17 3.9% 8914 764

Barium 17 23.0% 3250 1657

Iron 17 5.7% 4332 543

Magnesium 17 3.7% 7712 628

Strontium 17 4.3% 132.0 12.4

*All product preparation and testing identical to that for Lead on cover page of this certificate except as noted. Results for Methods 3050A and 3051 were different enough that they could not be combined and are reported separately. Product judged homogeneous for all elements shown except Barium. N = number of determinations. P.I. = prediction interval.

Results for non-NIST traceable elements

in LCS-401 by Method 3051 only*

Pooled Mean value, ±Uncertainty,

Element N data CV mg/kg 95% P.I., mg/kg

Aluminum 17 3.5% 7431 565

Barium 17 4.7% 10565 1077

Iron 17 10.7% 2855 662

Magnesium 17 4.6% 6299 634

Strontium 17 3.6% 180.4 13.9

Mercury** 18 1.9% 23.76 0.95

*All product preparation and testing identical to that for Lead on cover page of this certificate except as noted. Results for Methods 3050A and 3051 were different enough that they could not be combined and are reported separately. Product judged homogeneous for all elements shown. N = number of determinations. P.I. = prediction interval. **Results for Mercury using EPA Method 7471A Mercury in Solid or Semisolid Waste (Manual Cold-Vapor Technique).

Results for non-NIST traceable elements

in LCS-401 by modified Method 3052 only*

Pooled Mean value, ±Uncertainty,

Element N data CV mg/kg 95% P.I., mg/kg

Aluminum 18 6.2% 14294 1918

Barium 18 3.3% 15572 1098

Beryllium 18 0% <1 0

Cadmium 18 33.3% 17.1 12.3

Chromium 18 6.5% 97.1 13.6

Copper 18 0% <16 0

Iron 18 6.4% 5194 714

Magnesium 18 5.7% 21239 2624

Manganese 18 5.5% 197.1 23.3

Molybdenum 18 0% <40 0

Nickel 18 10.4% 115.8 26.1

Strontium 18 3.0% 238.3 15.3

Vanadium 18 16.1% 69.0 24.0

Zinc 18 5.8% 57850 7265

*All product preparation and testing identical to that for Lead on cover page of this certificate except as noted. Modified Method 3052, based on EPA Method 3052, Microwave Assisted Acid Digestion of Siliceous and Organically Based Matrices, is a microwave-assisted total digestion procedure in which the samples were first digested in a mixture of concentrated nitric acid and 49% hydrofluoric acid followed by additional digestion with concentrated hydrochloric and 49% hydrofluoric acids and on cooling, addition of boric and hydrochloric acids. For details of this procedure, contact manufacturer. Product judged homogeneous for all elements shown except for Cadmium and Vanadium. N = number of determinations. P.I. = prediction interval.

Results for NIST traceable elements

in LCS-401 by modified Method 3052 only*

Pooled Mean value, ±Uncertainty,

Element N data CV mg/kg 95% P.I., mg/kg

Lead 18 6.7% 4623 671

*Same footnotes as in previous table.

NIST traceability for LCS-401

vs. SRM 1579 for modified Method 3052

Mean value, Certified value

Element N mg/kg mg/kg % of SRM value

Lead 1 12900 11870 109

Page last updated: December 20, 2011. Prices and availability of products are current as of that date.