Report - Lead_AC-827579 46.7 thru Km 47.5 Utuado.pdf

LEAD BASED PAINT INSPECTION REPORT

FOR

PUERTO RICO HIGHWAY & TRANSPORTATION

AUTHORITY

SAMPLING CONDUCTED AT PROJECT:

PROJECT: EMERGENCY RELIEF PROGRAM LANDSLIDES

AND ROAD DAMAGE REPAIR

AC‐808544

GROUP 1A

STATE ROAD PR-10, KM. 46.7 THRU KM 47.5,

UTUADO, P.R.

ZEM-20064

MAY, 2020

PREPARED BY:

ZIMMETRY ENVIRONMENTAL MANAGEMENT CORP.

PO BOX 3545 BAYAMÓN, PR 00958

PHONE: 787.995.0005

WWW.ZIMMETRY.COM INFO@ZIMMETRY.COM

ZIMMETRY ENVIRONMENTAL MANAGEMENT CORP.

Lead Based Paint Inspection

PR-10, Km 46.7 thru Km 47.5 Utuado, P.R.

TABLE OF CONTENT

SECTION 1: EXECUTIVE SUMMARY

1.1 Introduction

1.2 Summary of Property Evaluation

1.3 Property Locations of Building Components with Lead Based Paint

Table 1-1 Summary of Building Components with Lead Based Paint

SECTION 2: LEAD-BASED PAINT INSPECTION REPORT

2.1 Overview of the Evaluation

2.2 Sampling Procedure and Results Presentation

2.3 Lead Regulatory Levels

2.4 Conditions and Limitations

2.5 Abatement Conditions

2.6 Recommendations

2.7 Environmental Assessment Report Certification

SECTION 3: APPENDICES

Appendix A: XRF Sampling Data

Appendix B: Project Photographs

Appendix C: Certifications, Licenses, and Accreditations

Appendix D: XRF’s Performance Characteristics Sheet

Appendix E: Location of Positive Material

Appendix F: Aerial Location Plan

PR-10, Km 46.7 thru Km 47.5 Utuado, P.R.

SECTION 1: EXECUTIVE SUMMARY

1.1 INTRODUCTION

Zimmetry Environmental Management Corp. was contracted by B&A Consulting Engineers, PSC to perform a Lead-Based Paint inspection. The survey was conducted on May 14, 2020 at the State Road PR-10, Km 46.7 thru Km 47.5 located at Utuado, P.R as part of Emergency Relief Program Landslides and Road Damage Repair, AC‐808544 project. The lead-based paint inspection was performed to identify paint that contains lead above allowable levels and to assist with the compliance of local, state and federal regulations.

1.2 SUMMARY OF PROPERTY EVALUATION

The project consisted of the evaluation of the site of the aforementioned project. The evaluation found that lead based paint was present in selective components and surfaces through the site on the date of the inspection. Table 1-1 identifies the components positive for lead. Table 2-1 identifies lead-based paint as defined by the U.S. Environmental Protection Agency (EPA) and the Environmental Quality Board (EQB). For specific locations and additional detail on the location of lead- reference Sections 2 and 3.

The project is located in the Global Positioning System (GPS) in Lat.: 18.30655, Long.:

- 66.71440 thru Lat.: 18.30117, Long.: -66.71412

1.3 PROPERTY LOCATIONS OF BUILDING COMPONENTS WITH LEAD-

BASED PAINT

Table 1-1 summarizes the site components and surfaces coated with lead-based paint.

Details that identify positive lead-based paint findings within specific areas and on surfaces were provided in the Lead-based paint inspection report. The “substrate” is the building component material directly beneath the painted surface. Photographic documentation is for reference purposes and doesn't necessarily include all the surfaces with lead based paint and/or components containing lead.

Table 1-1: Summary of Components containing Lead

Area Component Color Substrate Approximate

Amount

Km 47.3 Abandoned Road Pavement Markings

Yellow Concrete 80 Ln. Ft.

Km. 46.8 East Bound Parapet Lid Red Metal 1 Unit of 30 Ft2

West Bound Parapet Lid Red Metal 1 Unit of 30 Ft2 Note:

The quantification of positives materials presented in this table is only an estimate. If an abatement of the materials will be conducted, the Contractors shall estimate the amount of materials to be abated.

PR-10, Km 46.7 thru Km 47.5 Utuado, P.R.

SECTION 2: LEAD-BASED PAINT INSPECTION REPORT

2.1 OVERVIEW OF THE EVALUATION

This lead-based paint inspection is an investigation to identify all lead-based paint on a surface-by-surface basis. A lead-based paint inspection conforming to HUD guidelines was performed at the aforementioned site.

Averages of 96 samples were taken at identified surfaces of the evaluated areas using X-ray fluorescence (XRF) analyzer. The evaluation found that lead-based paint was present in selective components and surfaces through the site on the date of the assessment (See Table 1-1).

Some of the remaining XRF test locations exhibited lead-in-paint levels below the level that EPA identifies as lead-based paint, namely 1.0 mg/cm2. Such surfaces could create dust-lead or soil-lead hazards if the paint is turned into dust by abrasion, scraping, or sanding. Should these or any lead containing components or surfaces be disturbed in any manner that generates dust, care should be taken to limit its spread.

Testing was performed by Joanne Negrón, state-certified inspector LBPI-02320-011, using the Niton XLp-300A XRF, SN-101222. The credentials are provided in Section 3, Appendix C: Certifications, Licenses, and Accreditations. The XRF analyzer is designed to measure the lead content of surface coatings on a variety of building surfaces, substrates, and components. The measurement is rapid and nondestructive and, according to the manufacturer, is capable of detecting lead concentrations that occur within numerous layers of various surface coatings.

Please refer to the XRF Testing Results Section 3, Appendix A: XRF Sampling Data for the detailed analytical testing results for each distinct area inspected. The reports provide a complete testing data.

2.2 SAMPLING PROCEDURE AND RESULTS PRESENTATION

The Lead Based Paint Sampling Procedure was design to evaluate and document all the data obtained form the inspection in a sequential method that provided confidence at the moment of the results presentation.

The survey was performed following the methodology established in the HUD Guidelines for the Evaluation and Control of Lead Based Paint in Housing (2012 revision) and the PREQB Lead Based Paint Abatement Control Regulation. The surfaces evaluation was performed as follows:

If the lead concentration measured by the XRF Spectrum Analyzer is less than 1.0 mg/cm2 it is considered negative.

If the lead concentration measured by the XRF Spectrum Analyzer is equal or greater than 1.0 mg/cm2 it is considered positive.

PR-10, Km 46.7 thru Km 47.5 Utuado, P.R.

2.3 LEAD REGULATORY LEVELS

The lead regulatory levels provided below are those used when preparing this lead-based paint evaluation or when evaluating data collected. The EPA regulatory levels are the same as the state regulatory levels provided in the following table.

TABLE 2-1: LEAD REGULATORY LEVELS

EPA/EQB Levels

Lead-Based Paint

1.0 mg/cm2 or 0.5% by weight (or 5,000 ppm)

2.4 CONDITIONS AND LIMITATIONS—DISCLAIMER

Zimmetry Environmental Management Corp. has performed this lead-based paint inspection in a thorough and professional manner consistent with commonly accepted industry standards. The Preparer cannot guarantee and does not warrant that this evaluation has identified all adverse environmental factors and/or conditions affecting this site on the date of the evaluation.

The results reported and conclusions reached by the Preparer are solely for the benefit of the Owner. The results and opinions in this report, based solely on the conditions found at the project on the date of the evaluation, are valid only on that date. The Preparer assumes no obligation to advise the client of any changes in any real or potential lead-based paint hazards at this site beyond the date of the evaluation.

The lead inspection was performed to ready accessible components and surfaces. If suspected components that could contain lead are encountered underneath current installed tiles or other construction material, they shall be managed as containing lead until the appropriate test is performed.

2.5 ABATEMENT CONDITIONS

Abatement, as defined by HUD and the Puerto Rico Environmental Quality Board (EQB), means any set of measures designed to eliminate lead-based paint and/or lead-based paint hazards permanently. The people providing these services must to be trained in accordance with the EQB licensing/certification requirements. The product manufacturer and/or contractor must warrant abatement methods to last a minimum of 20 years, or these methods must have a design life of at least 20 years.

Abatement activities may include, but are not necessarily limited to:

onsite or offsite removal of lead-based paint from substrates and components replacement of components or fixtures painted with lead-based paint permanent enclosure of lead-based paint with construction materials mechanically-fastened to the substrate

PR-10, Km 46.7 thru Km 47.5 Utuado, P.R.

encapsulation of lead-based paint with specially designed encapsulant products removal or permanent covering (concrete or asphalt) of soil-lead-based paint hazards

If enclosure or encapsulation is conducted as an abatement method, the lead-based paint remains on the property, so ongoing lead-based paint maintenance is required.

2.6 RECOMMENDATIONS

According to the EQB lead regulations, prior to the demolishing of a structure containing lead based paint, the contaminated surfaces or substrates must be abated or removed. The waste generated has to be characterized to determine if the waste generated is hazardous or non hazardous waste. The firm providing the abatement services must be certified as an abatement firm by the EQB. Workers conducting abatement must be trained and certified as abatement workers by a training provider accredited by the EQB.

2.7 ENVIRONMENTAL ASSESSMENT REPORT CERTIFICATION

Zimmetry Environmental Management Corp. has performed this lead-based paint inspection in a thorough and professional manner consistent with commonly accepted industry standards. The inspection was conducted on May 14, 2020 by Joanne Negrón, state-certified inspector LBPI-02320-011, qualified by experience, education and training in the recognition of lead based paint and approved sampling techniques using the Niton XLp-300A XRF, SN- 101222.

Joanne Negrón, MSEM Environmental Risk Assessor

PR-10, Km 46.7 thru Km 47.5 Utuado, P.R.

SECTION 3: APPENDICES

Appendix A: XRF Sampling Data

Appendix B: Project Photographs

Appendix C: Certifications, Licenses, and Accreditations

Appendix D: XRF’s Performance Characteristics Sheet

Appendix E: Location of Positive Material

Appendix F: Aerial Location Plan

PR-10, Km 46.7 thru Km 47.5 Utuado, P.R.

APPENDIX A: XRF SAMPLING DATA

PROJECT:

DATE: 5/14/2020

Sample

ID.

Functional Space Location Color Subst. XRF Reading Pos/Neg Comments

1 Calibration 1.00 2 Calibration 1.00 3 Calibration 1.00 4 Km. 46.8 East Bound Parapet White Concrete 0.03 Negative 5 Km. 46.8 East Bound Parapet Green Concrete 0.40 Negative 6 Km. 46.8 East Bound Parapet Blue Concrete 0.00 Negative 7 Km. 46.8 East Bound Parapet Gray Metal 0.08 Negative 8 Km. 46.8 E. Bound Parapet Lid Red Metal 3.40 Positive 9 Km. 46.8 West Bound Parapet Green Concrete 0.00 Negative

10 Km. 46.8 W. Bound Parapet Lid Red Metal 3.40 Positive 11 Km. 46.8 West Bound Parapet White Concrete 0.00 Negative 12 Km. 46.9 West Bound Parapet White Concrete 0.02 Negative 13 Km. 46.9 West Bound Parapet Red Concrete 0.00 Negative 14 Km. 46.9 West Bound Parapet Green Concrete 0.00 Negative 15 Km. 46.9 West Bound Parapet Yellow Concrete 0.00 Negative 16 Km. 46.9 West Bound Parapet Yellow Concrete 0.03 Negative 17 Km. 46.9 East Bound Parapet Red Concrete 0.01 Negative 18 Km. 46.9 East Bound Parapet White Concrete 0.06 Negative 19 Km. 46.9 East Bound Parapet Green Concrete 0.08 Negative 20 Km. 46.9 East Bound Parapet White Concrete 0.00 Negative 21 Km. 46.9 Pavement Marking White Concrete 0.03 Negative 22 Km. 46.9 Pavement Marking Yellow Concrete 0.00 Negative 23 Km. 46.9 Pavement Marking Yellow Concrete 0.01 Negative 24 Km. 46.9 Pavement Marking White Concrete 0.00 Negative 25 Km. 46.9 Pavement Marking White Concrete 0.00 Negative 26 Km. 47.0 West Bound Parapet White Concrete 0.00 Negative 27 Km. 47.0 West Bound Parapet Red Concrete 0.00 Negative 28 Km. 47.0 West Bound Parapet Green Concrete 0.00 Negative 29 Km. 47.0 West Bound Parapet Yellow Concrete 0.00 Negative 30 Km. 47.0 West Bound Parapet Yellow Concrete 0.03 Negative 31 Km. 47.0 East Bound Parapet Red Concrete 0.01 Negative 32 Km. 47.0 East Bound Parapet White Concrete 0.06 Negative 33 Km. 47.0 East Bound Parapet Green Concrete 0.00 Negative 34 Km. 47.0 East Bound Parapet White Concrete 0.00 Negative 35 Km. 47.0 Pavement Marking White Concrete 0.01 Negative 36 Km. 47.0 Pavement Marking Yellow Concrete 0.01 Negative 37 Km. 47.0 Pavement Marking Yellow Concrete 0.00 Negative 38 Km. 47.0 Pavement Marking White Concrete 0.04 Negative 39 Km. 47.0 Pavement Marking White Concrete 0.04 Negative 40 Km. 47.1 West Bound Parapet White Concrete 0.00 Negative 41 Km. 47.1 West Bound Parapet Red Concrete 0.00 Negative 42 Km. 47.1 West Bound Parapet Green Concrete 0.00 Negative 43 Km. 47.1 West Bound Parapet Yellow Concrete 0.02 Negative 44 Km. 47.1 West Bound Parapet Yellow Concrete 0.03 Negative 45 Km. 47.1 East Bound Parapet Red Concrete 0.00 Negative 46 Km. 47.1 East Bound Parapet White Concrete 0.00 Negative 47 Km. 47.1 East Bound Parapet Green Concrete 0.02 Negative 48 Km. 47.1 East Bound Parapet White Concrete 0.00 Negative 49 Km. 47.1 Pavement Marking White Concrete 0.02 Negative 50 Km. 47.1 Pavement Marking Yellow Concrete 0.00 Negative 51 Km. 47.1 Pavement Marking Yellow Concrete 0.01 Negative 52 Km. 47.1 Pavement Marking White Concrete 0.00 Negative 53 Km. 47.1 Pavement Marking White Concrete 0.00 Negative 54 Km. 47.2 W. Bound Parapet Lid Red Metal 0.04 Negative 55 Km. 47.2 W. Bound Parapet Lid Red Metal 0.40 Negative 56 Km. 47.2 West Bound Parapet White Concrete 0.00 Negative 57 Km. 47.2 West Bound Parapet Red Concrete 0.04 Negative 58 Km. 47.2 West Bound Parapet Green Concrete 0.09 Negative 59 Km. 47.2 West Bound Parapet Yellow Concrete 0.40 Negative 60 Km. 47.2 West Bound Parapet Yellow Concrete 0.11 Negative

PR-10 Km. 46.7 thru 47.5, Utuado PR CLIENT: Puerto Rico Highway and Transportation Authority

LBP Inspector: Joanne Negrón

PROJECT:

DATE: 5/14/2020

Sample

ID.

Functional Space Location Color Subst. XRF Reading Pos/Neg Comments

61 Km. 47.2 E. Bound Parapet Lid Red Metal 0.04 Negative 62 Km. 47.2 E. Bound Parapet Lid Red Metal 0.02 Negative 63 Km. 47.2 East Bound Parapet Red Concrete 0.00 Negative 64 Km. 47.2 East Bound Parapet White Concrete 0.00 Negative 65 Km. 47.2 East Bound Parapet Green Concrete 0.00 Negative 66 Km. 47.2 East Bound Parapet White Concrete 0.00 Negative 67 Km. 47.2 Pavement Marking White Concrete 0.00 Negative 68 Km. 47.2 Pavement Marking Yellow Concrete 0.01 Negative 69 Km. 47.2 Pavement Marking Yellow Concrete 0.01 Negative 70 Km. 47.2 Pavement Marking White Concrete 0.00 Negative 71 Km. 47.2 Pavement Marking White Concrete 0.00 Negative 72 Km. 47.3 Pavement Marking White Concrete 0.00 Negative 73 Km. 47.3Abandoned Road Pavement Marking Yellow Concrete 3.80 Positive 74 Km. 47.3 Pavement Marking White Concrete 0.00 Negative 75 Km. 47.3 Pavement Marking White Concrete 0.00 Negative 76 Km. 47.3 Pavement Marking White Concrete 0.02 Negative 77 Km. 47.3 Pavement Marking Yellow Concrete 0.01 Negative 78 Km. 47.3 Pavement Marking Yellow Concrete 0.01 Negative 79 Km. 47.4 Pavement Marking White Concrete 0.00 Negative 80 Km. 47.4 Pavement Marking White Concrete 0.02 Negative 81 Km. 47.4 Pavement Marking White Concrete 0.00 Negative 82 Km. 47.4 Pavement Marking Yellow Concrete 0.01 Negative 83 Km. 47.4 Pavement Marking Yellow Concrete 0.03 Negative 84 Km. 47.5 Pavement Marking White Concrete 0.00 Negative 85 Km. 47.5 Pavement Marking White Concrete 0.00 Negative 86 Km. 47.5 Pavement Marking White Concrete 0.00 Negative 87 Km. 47.5 Pavement Marking Yellow Concrete 0.03 Negative 88 Km. 47.5 Pavement Marking Yellow Concrete 0.03 Negative 89 Km. 47.6 Pavement Marking White Concrete 0.00 Negative 90 Km. 47.6 Pavement Marking White Concrete 0.00 Negative 91 Km. 47.6 Pavement Marking White Concrete 0.00 Negative 92 Km. 47.6 Pavement Marking Yellow Concrete 0.03 Negative 93 Km. 47.6 Pavement Marking Yellow Concrete 0.01 Negative 94 Calibration 1.00 95 Calibration 1.00 96 Calibration 1.00

LBP Inspector: Joanne Negrón

PR-10 Km. 46.7 thru 47.5, Utuado PR CLIENT: Puerto Rico Highway and Transportation Authority

PR-10, Km 46.7 thru Km 47.5 Utuado, P.R.

Photographic documentation is for reference purposes and doesn't necessarily include all the surfaces with lead based paint and/or components containing lead

APPENDIX B: PROJECT PHOTOGRAPHS

PR-10 Km 46.8 Street View to Utuado

PR-10 Km 46.8 Street View to Arecibo

PR-10 Km 46.8 West Bound Lead based painted metal parapet lid

PR-10 Km 46.8 East Bound Lead based painted metal parapet lid

PR-10, Km 46.7 thru Km 47.5 Utuado, P.R.

Photographic documentation is for reference purposes and doesn't necessarily include all the surfaces with lead based paint and/or components containing lead

APPENDIX B: PROJECT PHOTOGRAPHS

PR-10 Km 46.9 Street View to Utuado

PR-10 Km 47.2 Street View to Utuado

PR-10 Km 47.2 Street View to Utuado

PR-10 Km 47.2 Street View to Arecibo

PR-10, Km 46.7 thru Km 47.5 Utuado, P.R.

Photographic documentation is for reference purposes and doesn't necessarily include all the surfaces with lead based paint and/or components containing lead

APPENDIX B: PROJECT PHOTOGRAPHS

PR-10 Km 47.3 - Abandoned Road Lead based painted concrete/asphalt pavement marking

PR-10 Km 47.3 - Abandoned Road Lead based painted concrete/asphalt pavement marking

PR-10 Km 47.5 Street View to Utuado

PR-10 Km 47.5

PR-10, Km 46.7 thru Km 47.5 Utuado, P.R.

Photographic documentation is for reference purposes and doesn't necessarily include all the surfaces with lead based paint and/or components containing lead

APPENDIX B: PROJECT PHOTOGRAPHS

PR-10 Km 47.6 Street View to Utuado

PR-10 Km 47.6

PR-10, Km 46.7 thru Km 47.5 Utuado, P.R.

APPENDIX C: CERTIFICATIONS, LICENSES, AND

ACCREDITATIONS

PR-10, Km 46.7 thru Km 47.5 Utuado, P.R.

APPENDIX C: CERTIFICATIONS, LICENSES, AND

ACCREDITATIONS

PR-10, Km 46.7 thru Km 47.5 Utuado, P.R.

APPENDIX D: XRF’s PERFORMANCE CHARACTERISTICS

SHEET

Niton XLp 300, 9/24/2004, ed. 1

Performance Characteristic Sheet EFFECTIVE DATE: September 24, 2004 EDITION NO.: 1

MANUFACTURER AND MODEL:

Make: Niton LLC Tested Model: XLp 300 Source: 109Cd

Note: This PCS is also applicable to the equivalent model variations indicated below, for the Lead-in-Paint K+L variable reading time mode, in the XLi and XLp series:

XLi 300A, XLi 301A, XLi 302A and XLi 303A.

XLp 300A, XLp 301A, XLp 302A and XLp 303A.

XLi 700A, XLi 701A, XLi 702A and XLi 703A.

XLp 700A, XLp 701A, XLp 702A, and XLp 703A.

Note: The XLi and XLp versions refer to the shape of the handle part of the instrument. The differences in the model numbers reflect other modes available, in addition to Lead-in- Paint modes. The manufacturer states that specifications for these instruments are identical for the source, detector, and detector electronics relative to the Lead-in-Paint mode.

FIELD OPERATION GUIDANCE

OPERATING PARAMETERS:

Lead-in-Paint K+L variable reading time mode.

XRF CALIBRATION CHECK LIMITS:

0.8 to 1.2 mg/cm2 (inclusive)

The calibration of the XRF instrument should be checked using the paint film nearest 1.0 mg/cm2 in the NIST Standard Reference Material (SRM) used (e.g., for NIST SRM 2579, use the 1.02 mg/cm2 film).

If readings are outside the acceptable calibration check range, follow the manufacturer's instructions to bring the instruments into control before XRF testing proceeds.

SUBSTRATE CORRECTION:

For XRF results using Lead-in-Paint K+L variable reading time mode, substrate correction is not needed for:

Brick, Concrete, Drywall, Metal, Plaster, and Wood

INCONCLUSIVE RANGE OR THRESHOLD:

K+L MODE

READING DESCRIPTION

SUBSTRATE THRESHOLD

(mg/cm2)

Results not corrected for substrate bias on any substrate

Brick Concrete Drywall Metal

Plaster Wood

1.0 1.0 1.0 1.0 1.0 1.0

BACKGROUND INFORMATION

EVALUATION DATA SOURCE AND DATE:

This sheet is supplemental information to be used in conjunction with Chapter 7 of the HUD Guidelines for the Evaluation and Control of Lead-Based Paint Hazards in Housing ("HUD Guidelines"). Performance parameters shown on this sheet are calculated from the EPA/HUD evaluation using archived building components. Testing was conducted in August 2004 on 133 testing combinations. The instruments that were used to perform the testing had new sources; one instrument’s was installed in November 2003 with 40 mCi initial strength, and the other’s was installed June 2004 with 40 mCi initial strength.

OPERATING PARAMETERS:

Performance parameters shown in this sheet are applicable only when properly operating the instrument using the manufacturer's instructions and procedures described in Chapter 7 of the HUD Guidelines.

SUBSTRATE CORRECTION VALUE COMPUTATION:

Substrate correction is not needed for brick, concrete, drywall, metal, plaster or wood when using Lead-in- Paint K+L variable reading time mode, the normal operating mode for these instruments. If substrate correction is desired, refer to Chapter 7 of the HUD Guidelines for guidance on correcting XRF results for substrate bias.

EVALUATING THE QUALITY OF XRF TESTING:

Randomly select ten testing combinations for retesting from each house or from two randomly selected units in multifamily housing. Use the K+L variable time mode readings.

Conduct XRF retesting at the ten testing combinations selected for retesting.

Determine if the XRF testing in the units or house passed or failed the test by applying the steps below.

Compute the Retest Tolerance Limit by the following steps:

Determine XRF results for the original and retest XRF readings. Do not correct the original or retest results for substrate bias. In single-family housing a result is defined as the average of three readings. In multifamily housing, a result is a single reading.

Therefore, there will be ten original and ten retest XRF results for each house or for the two selected units.

Calculate the average of the original XRF result and retest XRF result for each testing combination.

Square the average for each testing combination.

Add the ten squared averages together. Call this quantity C.

Multiply the number C by 0.0072. Call this quantity D.

Add the number 0.032 to D. Call this quantity E.

Take the square root of E. Call this quantity F.

Multiply F by 1.645. The result is the Retest Tolerance Limit.

Compute the average of all ten original XRF results.

Compute the average of all ten re-test XRF results.

Find the absolute difference of the two averages.

If the difference is less than the Retest Tolerance Limit, the inspection has passed the retest. If the difference of the overall averages equals or exceeds the Retest Tolerance Limit, this procedure should be repeated with ten new testing combinations. If the difference of the overall averages is equal to or greater than the Retest Tolerance Limit a second time, then the inspection should be considered deficient.

Use of this procedure is estimated to produce a spurious result approximately 1% of the time. That is, results of this procedure will call for further examination when no examination is warranted in approximately 1 out of 100 dwelling units tested.

TESTING TIMES:

For the Lead-in-Paint K+L variable reading time mode, the instrument continues to read until it is moved away from the testing surface, terminated by the user, or the instrument software indicates the reading is complete. The following table provides testing time information for this testing mode. The times have been adjusted for source decay, normalized to the initial source strengths as noted above. Source strength and type of substrate will affect actual testing times. At the time of testing, the instruments had source strengths of 26.6 and 36.6 mCi.

Testing Times Using K+L Reading Mode (Seconds)

All Data Median for laboratory-measured lead levels (mg/cm2)

Substrate 25th Percentile

Median 75th Percentile

Pb < 0.25 0.25 < Pb<1.0 1.0 < Pb

Wood Drywall

4 11 19 11 15 11

Metal

4 12 18 9 12 14

Brick Concrete Plaster

8 16 22 15 18 16

CLASSIFICATION RESULTS:

XRF results are classified as positive if they are greater than or equal to the threshold, and negative if they are less than the threshold.

DOCUMENTATION:

A document titled Methodology for XRF Performance Characteristic Sheets provides an explanation of the statistical methodology used to construct the data in the sheets, and provides empirical results from using the recommended inconclusive ranges or thresholds for specific XRF instruments. For a copy of this document call the National Lead Information Center Clearinghouse at 1-800-424-LEAD.

This XRF Performance Characteristic Sheet was developed by the Midwest Research Institute (MRI) and QuanTech, Inc., under a contract between MRI and the XRF manufacturer. HUD has determined that the information provided here is acceptable when used as guidance in conjunction with Chapter 7, Lead-Based Paint Inspection, of HUD’s Guidelines for the Evaluation and Control of Lead-Based Paint Hazards in Housing.

PR-10, Km 46.7 thru Km 47.5 Utuado, P.R.

APPENDIX E: LOCATION OF POSITIVE MATERIAL

Joanne Text Box

PARAPET LID

Joanne Text Box

PAVEMENT MARKING

PR-10, Km 46.7 thru Km 47.5 Utuado, P.R.

APPENDIX F: AERIAL LOCATION PLAN