APPENDIX 4.1 Air Quality Reports and Correspondence€¦ · SCAQMD Rule 403 (Fugitive Dust). The threshold for PM2.5 is designed to limit emissions and allow progress toward attainment

APPENDIX 4.1 Air Quality Reports and Correspondence

4.1a Localized Significance Threshold Analysis (Project Construction),

Air Quality Dynamics, January 2014

CASTAIC HIGH SCHOOL PROJECT

LOCALIZED SIGNIFICANCE THRESHOLD ANALYSIS (Project Construction)

Prepared For:

Meridian Consultants LLC 860 Hampshire Road, Suite P

Westlake Village, California 91361

Prepared By:

Air Quality Dynamics (818) 703-3294

January 2014

TABLE OF CONTENTS

Section Page 1.0 Introduction 1

2.0 Site Description 1

3.0 Localized Significance Threshold Analysis 2

3.1 Estimation of On-Site Emissions 3.2 Estimation of Pollutant Concentrations

4.0 Pollutant Impact Analysis 5

5.0 Findings 7

6.0 Conclusion 9

7.0 Mitigation of Pollutant Impacts 10

References 12

Appendices

Appendix A Emission Calculation Worksheets Appendix B Emission Rate Summary/Source Data Worksheets Appendix C Source-Receptor Grid Networks Appendix D Dispersion Model Input/Output Files (Electronic Format)

List of Figure(s)

Figure 1 Site Location /Vicinity Aerial Photograph

List of Table(s)

Table 1 Maximum Daily Emissions/Site Access Roads Table 2 Maximum Daily Emissions/School Site Table 3 California Ambient Air Quality Standards Table 4 Santa Clarita Monitoring Summary/Source-Receptor Area 13 Table 5 SCAQMD Air Quality Significance Thresholds Table 6 Maximum Pollutant Concentrations/Site Access Roads Table 7 Maximum Pollutant Concentrations/School Site

1

1.0 INTRODUCTION The South Coast Air Quality Management District (SCAQMD) provides voluntary guidance on the evaluation of localized air quality impacts to public agencies conducting environmental review of projects located within its jurisdiction. Localized air quality impacts are evaluated by examining the on-site generation of pollutants and their resulting downwind concentrations. For construction, pollutant concentrations are compared to significance thresholds for particulates (PM10 and PM2.5), carbon monoxide (CO) and nitrogen dioxide (NO2). The significance threshold for PM10 represents compliance with SCAQMD Rule 403 (Fugitive Dust). The threshold for PM2.5 is designed to limit emissions and allow progress toward attainment of the ambient air quality standard. Thresholds for CO and NO2 represent the allowable increase in concentrations above background levels that would not cause or contribute to an exceedance of their respective ambient air quality standards. Based upon the extent of the project’s earth moving and related construction activities, a Localized Significance Threshold (LST) analysis was prepared to determine the project’s potential environment effects on local air quality. The technical approach and dispersion modeling methodologies used in the preparation of the LST analysis were composed of all relevant and appropriate procedures presented by the U.S. Environmental Protection Agency (U.S. EPA), California Environmental Protection Agency and SCAQMD. The methodologies and assumptions offered under this regulatory guidance were used to ensure that the analysis effectively quantified exposures to sensitive receptors associated with the generation of pollutant emissions from on-site construction activity. This report summarizes the protocol used to evaluate pollutant exposures and presents the results of the LST analysis.

2.0 SITE DESCRIPTION The project consists of the construction of a new high school complex with approximately 250,000 square feet of building area. Building amenities include classrooms, library, performing arts, multipurpose, physical education and administrative facilities. Athletic services include a 5,000-seat football/soccer stadium with a running track, tennis courts, basketball courts, baseball and softball fields and related play fields. The project will also incorporate the development of several roadway segments providing school access via Canyon Hill Road, Sloan Canyon Road East, Baringer Road and Sloan Canyon Road South. The project is located within the community of Castaic, an unincorporated area of Los Angeles County, California. The site encompasses land east and west of Romero Canyon Road. The City of Santa Clarita is located approximately five miles south; Castaic Lake to the northeast, east of Interstate 5 (I-5) and the Los Padres National Forest to the north. The site is currently vacant and consists of hills, steep ridges and canyons. Sparse residential dwellings are located predominately south of the site with dense residential development

located to the east. North and west of the site the land is generally undeveloped. Figure 1 presents an aerial photograph of the proposed project location.

Figure 1 Site Location /Vicinity Aerial Photograph

3.0 LOCALIZED SIGNIFICANCE THRESHOLD ANALYSIS Based upon the extent of the project’s proposed earth moving and heavy construction activities, air quality was identified as one area subject to further analysis whereby emissions associated with construction operations may result in concentrations in the immediate vicinity of the project site that exceed significance thresholds for PM10, PM2.5, CO and NO2 established by the SCAQMD. To determine if these potential impacts are significant, an LST analysis was prepared. 3.1 Estimation of On-Site Emissions The localized impacts of the project were evaluated based on the maximum daily emissions generated during each identified construction phase. To determine maximum daily emissions, the sample construction scenario spreadsheets developed by the SCAQMD were used as the basis to estimate project specific emissions. For the east and south access road locations, emissions associated with site preparation/clearing/grading and paving were assessed. For construction of the main school site/campus, the analysis evaluated discrete phases

2

commensurate with those identified by the project applicant and include site preparation/clearing, grading, trenching/utilities, building construction and paving. Appropriate adjustments were made to the SCAQMD construction scenarios to accommodate specific characteristics of the proposed project. These adjustments include the use of updated off-road emission factors, site dimensions, equipment inventory, number of on-site workers, hours of operation, duration of construction phase, disturbed surface area, amount of soil/debris handled and wind speed. Tables 1 and 2 provide a summary of estimated maximum daily emissions for each site and construction phase. Appendix A presents the emission calculation worksheets used to quantify pollutant source strength.

Table 1 Maximum Daily Emissions

Site Access Roads

Pollutant

PM10 PM2.5 CO NOx Segment Construction Phase

(Lbs/Day) (Lbs/Day) (Lbs/Day) (Lbs/Day)

Site Preparation/Clearing/ Grading 19.04 12.22 149.38 256.95

Canyon Hill Road

Paving 1.15 1.06 10.94 20.03


Sloan Canyon Road East

Paving 1.15 1.06 10.94 20.03


Baringer Road / Romero Canyon Road Improvements

Paving 1.15 1.06 10.94 20.03


Sloan Canyon Road South

Paving 1.15 1.06 10.94 20.03

Table 2 Maximum Daily Emissions

School Site

Pollutant

PM10 PM2.5 CO NOx Construction Phase

(Lbs/Day) (Lbs/Day) (Lbs/Day) (Lbs/Day)

Site Preparation/Clearing 7.91 5.55 49.96 107.35

Grading 39.28 22.05 235.36 433.48

Trenching/Utilities 2.70 2.49 20.09 52.46

Building Construction 2.57 2.37 27.84 44.84

Paving 1.43 1.32 13.62 24.61

3

3.2 Estimation of Pollutant Concentrations In order to assess the impact of PM10, PM2.5, and CO emissions on the adjoining community, air quality modeling utilizing the Industrial Source Complex-Short Term (ISCST3) model was performed. This model is a steady state Gaussian plume model used by the SCAQMD to develop the LST Methodology. For NO2, the AMS/EPA Regulatory Model AERMOD was used to assess the downwind extent of nitrogen oxide (NOx) emissions and determine their subsequent conversion to ambient NO2 concentrations. AERMOD offers a refinement over the conversion rate ratios utilized in the LST Methodology as adapted from the work of Arellano et al. AERMOD’s air dispersion algorithms are based upon a planetary boundary layer turbulence structure and scaling concepts, including the treatment of surface and elevated sources in simple and complex terrain. The model incorporates two methodologies to perform the NOx to NO2 conversion. In a recent clarification memorandum (U.S. EPA, 2011), the Office of Air Quality Planning and Standards provides guidance on the use and performance of the two algorithms referred to as the ozone limiting (OLM) and plume volume molar ratio (PVMRM) methods. Based upon this guidance, the OLM algorithm with the OLMGROUP ALL option was identified as the preferred method to perform the analysis. An initial NO2/NOx ratio of 5 percent (i.e., NO2STACK), as utilized in the LST Methodology, was assigned to all mobile sources. Although the project is located in complex terrain, ISCST3 assumes area sources are terrain following. To ensure consistency in the modeling exercise, mobile source PM10 and PM2.5 emissions were also modeled assuming flat terrain. For CO emissions, both flat and complex terrain conditions were assessed to identify maximum pollutant concentrations. For NO2, the analysis followed guidance promulgated by the U.S. EPA (U.S. EPA, 2009) whereby the AERMOD model was programmed to assume flat, level terrain. This was done as the model will tend to underestimate pollutant concentrations in cases where receptor elevations are lower than the base elevation of the source and down-slope gravity and drainage flow patterns promote a terrain following plume. Source treatment outlined in the LST methodology was utilized whereby exhaust emissions from construction equipment were treated as a set of side-by-side elevated volume sources with a release height of five and an initial vertical dimension of 1.4 meters. Fugitive dust emissions were treated as a ground-based source with a one meter vertical dimension and source areas incorporating project site acreage and configuration. For PM10 and PM2.5, plume depletion due to dry removal mechanisms was assumed (i.e., ARDPLT). Entrained or fugitive PM10 emissions were separated into three aerodynamic diameter sizes of 1.0, 2.5 and 10 microns (m) with weight fractions of 0.0787, 0.1292, and 0.7922, respectively. Fugitive PM2.5 emissions were separated into two particle sizes of 1.0 and 2.5 m with corresponding weight fractions of 0.3785 and 0.6215. PM10 emissions associated with mobile source activity were assigned particle size bins of 2.5 and 10 microns with corresponding weight fractions of 0.92 and 0.08. PM2.5 emissions were limited to an

4

aerodynamic diameter of 2.5 m. A particle density of 2.3 grams per cubic centimeter was assigned to all size bins. Air dispersion models require additional input parameters including pollutant emission data and local meteorology. Due to the their sensitivity to individual meteorological parameters such as wind speed and direction, the U.S. EPA recommends that meteorological data used as input into dispersion models be selected on the basis of relative spatial and temporal conditions that exist in the area of concern. In response to this recommendation, meteorological data from the SCAQMD Newhall/Santa Clarita monitoring station was used to represent local weather conditions and prevailing winds. For ISCST3, a preprocessed 1981 data set was utilized. For AERMOD, five years (2005-2009) of available meteorological data were reviewed to identify the calendar years which produced the highest NO2 pollutant concentrations. Model scalar options were additionally invoked to address emissions generated during daytime hours and commensurate with on-site construction activity (e.g., ending hours 9 to 16). Construction activities associated with identified access roads and the school site will not coincide and are treaded as discrete operations in the dispersion analysis. To accommodate a Cartesian grid format for the identified construction activities, direction dependent calculations were obtained by identifying the universal transverse mercator (UTM) coordinates for each source location. Off-site receptors were identified to provide representative coverage throughout the adjoining community. A flagpole receptor height of two meters was also assumed and assigned to each receptor location. A graphical representation of the source-receptor grid networks associated with access road and school site construction activities are presented in Appendix C. Pollutant emission rate and source data used to complete the dispersion analysis are provided in Appendix B. A complete listing of model input/output files are provided in electronic format in Appendix D.

4.0 POLLUTANT IMPACT ANALYSIS The State of California has promulgated strict ambient air quality standards for various pollutants. These standards were established to safeguard the public’s health and welfare with specific emphasis on protecting those individuals susceptible to respiratory distress, such as asthmatics, the young, the elderly and those with existing conditions which may be affected by increased pollutant concentrations. Table 3 presents the California Ambient Air Quality Standards (CAAQS) and averaging times for the criteria pollutants considered in the assessment. Pollutant emissions are considered to have a significant effect on the environment if they result in concentrations that create either a violation of an ambient air quality standard, contribute to an existing air quality violation or expose sensitive receptors to substantive pollutant concentrations. Should ambient air quality already exceed existing standards, the

5

SCAQMD has established significance criteria for selected compounds to account for the continued degradation of local air quality. Background concentrations are based upon the highest observed value for the most recent three year period.

Table 3 California Ambient Air Quality Standards

Pollutant Standard Health Effects

Particulates (PM10) >50 g/m3 (24 hr avg.)

>20 g/m3 (Annual)

1) Excess deaths from short-term exposures and the exacerbation of symptoms in sensitive individuals with respiratory disease. 2) Excess seasonal declines in pulmonary function especially in children.

Particulates (PM2.5) >12 g/m3 (Annual) 1) Excess deaths and illness from long-term exposures and the exacerbation of symptoms in sensitive individuals with respiratory and cardio pulmonary disease.

Carbon Monoxide (CO)

>9.0 ppm (8 hr avg.) >20.0 ppm (1 hr avg.)

1) Aggravation of angina pectoris and other aspects of coronary heart disease. 2) Decreased exercise tolerance in persons with peripheral vascular disease and lung disease. 3) Impairment of central nervous system functions. 4) Possible increased risk to fetuses.

Nitrogen Dioxide (NO2) >0.18 ppm (1 hr avg.)

1) Potential to aggravate chronic respiratory disease and respiratory symptoms in sensitive groups. 2) Risk to public health implied by pulmonary and extra-pulmonary biochemical and cellular changes and pulmonary structural changes.

Abbreviations: ppm: parts per million; g/m3: micrograms per cubic meter. Source: California Code of Regulations, Title 17, Section 70200.

For short duration construction activities, the SCAQMD has established discrete thresholds for particulates based upon ambient air concentrations required to exceed an equivalent value of 50 micrograms per cubic meter (g/m3) averaged over five hours. The equivalent concentration for both PM10 and PM 2.5 is 10.4 g/m3. This threshold applies to sensitive receptors such as a residence, hospital or convalescent facility were it is possible that an individual could remain for 24 hours. For the CO 1 and 8-hour averaging times and the NO2 1-hour averaging time, background concentrations are below current air quality standards. As such, significance is achieved when pollutant concentrations add to existing levels and create an exceedance of the CAAQS. Unlike the particulate threshold referenced above which is based upon an individuals daily exposure, short duration exposures apply to all receptors such as industrial or commercial facilities since it is reasonable to assume that an individual could be present for periods of one to eight hours. Table 4 shows the pollutant concentrations for CO and NO2 collected at the Santa Clarita Monitoring Station (Source-Receptor Area 13) for the last three years of available data. Table 5 outlines the relevant significance thresholds considered in the LST analysis.

6

Table 4 Santa Clarita Monitoring Summary / Source-Receptor Area 13

Year Pollutant/ Averaging Time 2010 2011 2012 Maximum

Carbon Monoxide (CO) 1-Hour 8-Hour

2.0 1.1

1.2 0.8

1.3 1.1

2.0 1.1

Nitrogen Dioxide (NO2) 1-Hour

0.0593 0.0601 0.0661 0.0661

Note: PM10 concentrations are expressed in micrograms per cubic meter (g/m3). All others are expressed in parts per million (ppm). Source: South Coast Air Quality Management District and U.S Environmental Protection Agency.

Table 5 SCAQMD Air Quality Significance Thresholds

Pollutant Averaging Time Pollutant Concentration

Particulates (PM10) Particulates (PM2.5)

24-Hours 10.4 g/m3 (construction)

Carbon Monoxide (CO) 1/8-Hours

SCAQMD is in attainment; project is significant if it causes or

contributes to an exceedance of the following attainment standards 20 ppm (1-hour) and 9 ppm (8-hour).

Nitrogen Dioxide (NO2) 1-Hour

SCAQMD is in attainment; project is significant if it causes or

contributes to an exceedance of the following attainment standard 0.18

ppm.

Abbreviations: ppm: parts per million; g/m3: micrograms per cubic meter Source: South Coast Air Quality Management District.

5.0 FINDINGS

A brief discussion of the results of the dispersion analysis are presented for each identified construction phase Tables 6 and 7 present the modeled concentrations predicted for each pollutant. For the construction of Canyon Hill Road, PM10 and PM2.5 maximum concentrations of 4.14505 and 2.68859 micrograms per cubic meter (g/m3) were predicted. These values do not exceed SCAQMD’s significance threshold of 10.4 g/m3. The maximum modeled 1-hour average concentration for CO of 0.20867 parts per million (ppm) when added to an existing background concentration of 2.0 ppm, will not cause an exceedance of the CAAQS of 20 ppm. For the 8-hour averaging time, the maximum predicted concentration of 0.08552, when added to an existing background level of 1.1 ppm, does not cause an exceedance of the CAAQS of 9 ppm. For NO2, a maximum one hour concentration of 0.05433 ppm (102.20989 g/m3) was predicted. This concentration, when added to a background concentration of 0.0661 ppm, will not cause an exceedance of the CAAQS of 0.18 ppm.

7

For the construction of Sloan Canyon Road East, PM10 and PM2.5 maximum concentrations of 8.00788 and 5.30913 micrograms per cubic meter (g/m3) were predicted. These values do not exceed SCAQMD’s significance threshold of 10.4 g/m3. The maximum modeled 1-hour average concentration for CO of 0.53501 ppm when added to an existing background concentration of 2.0 ppm, will not cause an exceedance of the CAAQS of 20 ppm. For the 8-hour averaging time, the maximum predicted concentration of 0.17198, when added to an existing background level of 1.1 ppm, does not cause an exceedance of the CAAQS of 9 ppm. For NO2, a maximum one hour concentration of 0.11559 ppm (217.46350 g/m3) was predicted. This concentration, when added to a background concentration of 0.0661 ppm, will exceed the CAAQS of 0.18 ppm. For the construction of Baringer Road and Romero Canyon Road improvements, PM10 and PM2.5 maximum concentrations of 12.40850 and 8.40443 g/m3 were predicted. For PM10, this value exceeds SCAQMD’s significance threshold of 10.4 g/m3. The maximum modeled 1-hour average concentration for CO of 1.01015 ppm when added to an existing background concentration of 2.0 ppm, will not cause an exceedance of the CAAQS of 20 ppm. For the 8-hour averaging time, the maximum predicted concentration of 0.32441, when added to an existing background level of 1.1 ppm, does not cause an exceedance of the CAAQS of 9 ppm. For NO2, a maximum one hour concentration of 0.13190 ppm (248.14715 g/m3) was predicted. This concentration, when added to a background concentration of 0.0661 ppm, will exceed the CAAQS of 0.18 ppm. For the construction of Sloan Canyon Road South, PM10 and PM2.5 maximum concentrations of 6.86449 and 4.63654 g/m3 were predicted. These values do not exceed SCAQMD’s significance threshold of 10.4 g/m3. The maximum modeled 1-hour average concentration for CO of 0.53326 ppm when added to an existing background concentration of 2.0 ppm, will not cause an exceedance of the CAAQS of 20 ppm. For the 8-hour averaging time, the maximum predicted concentration of 0.16852, when added to an existing background level of 1.1 ppm, does not cause an exceedance of the CAAQS of 9 ppm. For NO2, a maximum one hour concentration of 0.07401 ppm (139.23787 g/m3) was predicted. This concentration, when added to a background concentration of 0.0661 ppm, will not cause an exceedance of the CAAQS of 0.18 ppm. For school site construction, PM10 and PM2.5 maximum concentrations of 2.79127 and 1.64684 g/m3 were predicted. These values do not exceed SCAQMD’s significance threshold of 10.4 g/m3. The maximum modeled 1-hour average concentration for CO of 0.14674 ppm when added to an existing background concentration of 2.0 ppm, will not cause an exceedance of the CAAQS of 20 ppm. For the 8-hour averaging time, the maximum predicted concentration of 0.04596 ppm, when added to an existing background level of 1.1 ppm, does not cause an exceedance of the CAAQS of 9 ppm.

8

For NO2, a maximum one hour concentration of 0.04733 ppm (89.04542 g/m3) was predicted. This concentration, when added to a background concentration of 0.0661 ppm, will not cause an exceedance of the CAAQS of 0.18 ppm.

Table 6 Maximum Pollutant Concentrations

Site Access Roads

Pollutant

PM10 PM2.5 CO NOx Segment Construction Phase

(24-Hours) (24-Hours) (1-Hour/8 Hours) (1-Hour)

Site Preparation/Clearing/ Grading 4.14505 2.68859 0.20867/0.08552 0.05433

Canyon Hill Road

Paving 0.24854 0.23021 0.01509/0.00626 0.01045



Paving 0.50781 0.46977 0.03855/0.01274 0.02207


Baringer Road / Romero Canyon Road Improvements

Paving 0.84849 0.78521 0.05943/0.02129 0.03826



Paving 0.44406 0.41089 0.03506/0.01115 0.01233

Note: Particulate concentrations are expressed in micrograms per cubic meter (g/m3). All others are expressed in parts per million (ppm). Nitrogen Dioxide (NO2) concentrations were converted from the dispersion model output expressed in micrograms per cubic meter (g/m3) to ppm assuming a compound molecular weight of 46 and conversion at 25oC.

Table 7 Maximum Pollutant Concentrations

School Site

Pollutant

PM10 PM2.5 CO NOx Construction Phase (24-Hours) (24-Hours) (1-Hour/8 Hours) (1-Hour)

Site Preparation/Clearing 0.56830 0.41264 0.03115/0.00976 0.02023

Grading 2.79127 1.64684 0.14674/0.04596 0.04733

Trenching/Utilities 0.21729 0.20195 0.01191/0.00371 0.01107

Building Construction 0.20705 0.19215 0.01914/0.00596 0.00946

Paving 0.11521 0.10703 0.00936/0.00292 0.00519

Note: Particulate concentrations are expressed in micrograms per cubic meter (g/m3). All others are expressed in parts per million (ppm). Nitrogen Dioxide (NO2) concentrations were converted from the dispersion model output expressed in micrograms per cubic meter (g/m3) to ppm assuming a compound molecular weight of 46 and conversion at 25

6.0 CONCLUSION

Results of the LST analysis reveal that maximum pollutant concentrations of NO2 during construction (i.e., site preparation, clearing and grading) of Sloan Canyon Road East are

9

predicted to exceed the significance threshold of 0.18 ppm. In addition, site preparation, clearing and grading activities associated with the construction of Baringer Road and associated Romero Canyon Road improvements are predicted to exceed significance thresholds for PM10 and NO2. For all remaining construction phases of the proposed project, pollutant concentrations are not anticipated to exceed identified significance thresholds at any receptor location.

7.0 MITIGATION OF POLLUTANT IMPACTS As noted above, the significance threshold for PM10 represents compliance with SCAQMD Rule 403. Implementation of the following mitigation options are recommended to reduce particulate concentrations associated with the construction of the Baringer Road/Romero Canyon Road improvements segment below identified significance thresholds.

Option 1

Comply with all relevant and appropriate provisions of SCAQMD Rule 403. Implementation of best available control measures as outlined in Rule 403 will serve to prevent, reduce and mitigate fugitive dust emissions. Validation of compliance, which limits disparity in upwind/downwind PM10 concentrations to 50 g/m3, can be achieved by conducting simultaneous sampling to identify the difference between upwind/downwind samples collected on high-volume particulate matter samplers or other U.S. EPA-approved equivalent methods.

Option 2

Utilize heavy construction equipment rated 75 horsepower and above that meet Tier 3 emission standards. Under this scenario, a maximum PM10 concentration of 8.87505 g/m3 was predicted. This value is below the SCAQMD significance threshold of 10.4 g/m3.

The significance threshold for NO2 represents the allowable increase in concentrations above background levels that would not cause or contribute to an exceedance of the ambient air quality standard. As previously noted, the LST analysis assumed a maximum background concentration of 0.0661 ppm. It is recommended that a performance standard be utilized to limit NO2 exposures by verifying background concentrations prior to the commencement of construction activities for Sloan Canyon East and the Baringer Road/Romero Canyon Road improvements construction phases. The SCAQMD provides a daily forecast of pollutant concentrations for the Santa Clarita Valley (http://www.aqmd.gov/smog/Forecast.htm). A daily review should be conducted and background values recorded and compared to the maximum predicted LST analysis concentration. For forecast concentrations at or below 0.02 ppm (based upon an averaging time adjustment factor of 0.4 to convert a 24 hour to one hour averaging time), NO2 impacts would be considered less than significant. Should background concentrations exceed 0.02 ppm, the following options may be implemented to eliminate and/or reduce NO2 impacts.

10

For Sloan Canyon Road East:

Option 1

Reduce the construction fleet which limits active scraper and bulldozer activity to 6 and 4, respectively. Under this scenario, a maximum one hour NO2 concentration of 0.11413 ppm (214.72523 g/m3) was predicted. This concentration, when added to a background concentration of 0.0661 ppm, will meet but not exceed the CAAQS.

Option 2

Utilize heavy construction equipment rated 75 horsepower and above that meet Tier 3 emission standards. Under this scenario, a maximum one hour NO2 concentration of 0.07047 ppm (132.57317 g/m3) was predicted. This concentration, when added to a background concentration of 0.0661 ppm, will produce pollutant concentrations below the CAAQS.

For Baringer Road/Romero Canyon Road improvements:

Option 1

Reduce the construction fleet which limits active scraper and bulldozer activity to 6 and 4, respectively. Under this scenario, a maximum one hour NO2 concentration of 0.12737 ppm (239.62555 g/m3) was predicted. This concentration, when added to a background concentration of 0.0661 ppm, will exceed the CAAQS. Although the impact remains significant, the reduction in equipment inventory will serve to reduce pollutant concentrations yet maintain a sufficient off-road fleet to allow continued construction of the roadway segment.

Option 2

Utilize heavy construction equipment rated 75 horsepower and above that meet Tier 3 emission standards. Under this scenario, a maximum one hour NO2 concentration of 0.11809 ppm (222.17478 g/m3) was predicted. This concentration, when added to a background concentration of 0.0661 ppm, will exceed the CAAQS. Use of this option will reduce but not eliminate pollutant impacts.

11

REFERENCES

1. Arellano et al, 1990. A Chemically Reactive Plume Model for the NO-NO2-O3 System. 2. California Air Pollution Control Officers Association (CAPCOA), 1987. Toxic Air

Pollutant Source Assessment Manual for California Air Pollution Control Districts and Applicants for Air Pollution Control District Permits, prepared by Interagency Workshop Group, (Revised) December 1989.

3. California Air Pollution Control Officers Association (CAPCOA), 1993. Air Toxics “Hot

Spots” Program Risk Assessment Guidelines. 4. California Air Resources Board, 1997. Methods for Assessing Area Source Emissions in

California: Volume III (Revised). 5. California Code of Regulations, Title 17, Section 70200. 6. Futaba, Debbie, California Air Resources Board, 2013. Revised off road in-use emission

factors for the South Coast Air Basin. 7. McCarthy, Brian, Meridian Consultants, LLC., 2013. Personal communications with Bill

Piazza, Air Quality Dynamics. 8. United States Environmental Protection Agency, 2013. AirData Data Mart. Website:

http://www.epa.gov/airdata/. 9. United States Environmental Protection Agency, Office of Air Quality Planning and

Standards, 2011. Additional Clarification Regarding Application of Appendix W Modeling Guidance for the 1-hour NO2 National Ambient Air Quality Standard.

10. United States Environmental Protection Agency, 2004. User’s Guide for the AMS/EPA

Regulatory Model - AERMOD. EPA-454/B-03-001. 11. United States Environmental Protection Agency, Office of Air Quality Planning and

Standards, 1995. Compilation of Air Pollutant Emission Factors, Volume 1: Stationary Point and Area Sources, Fifth Edition. AP-42.

12. United States Environmental Protection Agency, 1995. Screening Procedures for

Estimating the Air Quality Impact of Stationary Sources, Revised. EPA-450/R-92-019. 13. United States Environmental Protection Agency, 1986. Guideline on Air Quality Models

(Revised). EPA-450/2-78-027R. 14. United States Environmental Protection Agency, Office of Air Quality Planning and

Standards, 1995. User’s Guide for the Industrial Source Complex (ISC3) Dispersion Models, Volumes I and II. EPA-454/B-95-003a and b.

15. South Coast Air Quality Management District, 2013. Historical Data by Year. Website:

http://www.aqmd.gov/smog/historicaldata.htm.

12

16. South Coast Air Quality Management District, 2013. Daily Air Quality Forcast. Website: http://www.aqmd.gov/smog/Forecast.htm.

17. South Coast Air Quality Management District, 2011. SCAQMD Air Quality Significance

Thresholds. Website: http://www.aqmd.gov/ceqa/handbook/signthres.pdf. 18. South Coast Air Quality Management District, 2011. Air Quality Significance

Thresholds. Website: http://www.aqmd.gov/ceqa/handbook/signthres.pdf. 19. South Coast Air Quality Management District, 2011. AQMD Modeling Guidance for

AERMOD. Website: http://www.aqmd.gov/smog/metdata/AERMOD_Modeling Guidance.html.

20. South Coast Air Quality Management District, 2009. CEIDARS PM Profile Database.

Website: http://www.aqmd.gov/ceqa/handbook/PM2_5/finalAppA.doc. 21. South Coast Air Quality Management District, 2005-2009. Meteorological Data Set for

Santa Clarita, California. 22. South Coast Air Quality Management District, 2008. Final Localized Significance

Threshold Methodology. 23. South Coast Air Quality Management District, 2006. Final – Methodology to Calculate

Particulate Matter (PM) 2.5 and PM 2.5 Significance Thresholds. 24. South Coast Air Quality Management District, 2005. Sample Construction Scenarios for

Projects Less than Five Acres in Size. 25. South Coast Air Quality Management District, 1981. Meteorological Data Set for

Newhall, California. 26. William S. Hart Union High School District, 2012, Castaic High School Draft

Environmental Impact Report (SCH No. 2004031110.

13

A

APPENDIX A

Emission Calculation Worksheets

APPENDIX B

Emission Rate Summary/Source Data Worksheets

B

PM10 Phase Fugitive Combustion Fugitive Combustionmass mass g/s/m2 g/s/source

SP/C/G 7.49 11.55 8.6030E-06 4.4368E-03Paving 0.00 1.15 0.0000E+00 4.4176E-04

Source Area 13712Sources 41

PM2.5 Phase Fugitive Combustion Fugitive Combustionmass mass g/s/m2 g/s/source

SP/C/G 1.57 10.65 1.8033E-06 4.0911E-03Paving 0.00 1.06 0.0000E+00 4.0719E-04


CO Phase Combustion Combustionmass g/s/source

SP/C/G 149.38 5.7383E-02Paving 10.94 4.2025E-03

Sources 41

NOX Phase Combustion Combustionmass g/s/source

SP/C/G 256.95 9.8704E-02Paving 20.03 7.6943E-03

Sources 41

Emission Rate Summary WorksheetCanyon Hill Road

B-1


SP/C/G 5.59 11.28 2.8476E-06 3.4165E-03Paving 0.00 1.15 0.0000E+00 3.4831E-04



SP/C/G 1.17 10.39 5.9600E-07 3.1469E-03Paving 0.00 1.06 0.0000E+00 3.2105E-04



SP/C/G 147.67 4.4726E-02Paving 10.94 3.3135E-03

Sources 52


SP/C/G 251.35 7.6128E-02Paving 20.03 6.0666E-03

Sources 52

Inventory Reduction


SP/C/G 198.40 6.0091E-02

Sources 52

Tier 3 Inventory


SP/C/G 109.52 3.3171E-02

Sources 52

Emission Rate Summary WorksheetSloan Canyon Road East

B-2


SP/C/G 4.27 11.20 5.0493E-06 5.0399E-03Paving 0.00 1.15 0.0000E+00 5.1749E-04



SP/C/G 0.90 10.31 1.0642E-06 4.6394E-03Paving 0.00 1.06 0.0000E+00 4.7699E-04



SP/C/G 147.18 6.6230E-02Paving 10.94 4.9229E-03

Sources 35


SP/C/G 249.77 1.1239E-01Paving 20.03 9.0133E-03

Sources 35

Inventory Reduction


SP/C/G 3.94 8.87 4.6590E-06 3.9914E-03



SP/C/G 196.82 8.8567E-02

Sources 35

Emission Rate Summary WorksheetBaringer Road / Romero Canyon Road Improvements

B-3

Tier 3 Inventory


SP/C/G 4.27 5.72 5.0493E-06 2.5739E-03



SP/C/G 107.94 4.8572E-02

Sources 35

B-4


SP/C/G 5.38 11.36 2.6895E-06 3.3758E-03Paving 0.00 1.15 0.0000E+00 3.4174E-04



SP/C/G 1.13 10.47 5.6490E-07 3.1113E-03Paving 0.00 1.06 0.0000E+00 3.1499E-04



SP/C/G 148.22 4.4046E-02Paving 10.94 3.2510E-03

Sources 53


SP/C/G 253.17 7.5233E-02Paving 20.03 5.9522E-03

Sources 53

Emission Rate Summary WorksheetSloan Canyon Road South

B-5


SP/C 2.60 5.31 6.6864E-08 3.6048E-04Grading 20.04 19.24 5.1536E-07 1.3061E-03T/U 0.10 2.60 3.0279E-09 2.0475E-04Building 0.00 2.57 0.0000E+00 2.0238E-04Paving 0.00 1.43 0.0000E+00 1.1261E-04

Source Area A 612428Sourch Area B 520143Sources A 232Sources B 200


SP/C 0.55 5.00 1.4144E-08 3.3943E-04Grading 4.21 17.84 1.0827E-07 1.2111E-03T/U 0.02 2.47 6.0559E-10 1.9451E-04Building 0.00 2.37 0.0000E+00 1.8663E-04Paving 0.00 1.32 0.0000E+00 1.0395E-04

Source Area A 612428Source Area B 520143Sources A 232Sources B 200


SP/C 49.96 3.3916E-03Grading 235.36 1.5978E-02T/U 20.09 1.5821E-03Building 27.84 2.1924E-03Paving 13.62 1.0726E-03

Sources A 232Sources B 200


SP/C 107.35 7.2876E-03Grading 433.48 2.9427E-02T/U 52.46 4.1311E-03Building 44.84 3.5311E-03Paving 24.61 1.9380E-03

Sources A 232Sources B 200

Emission Rate Summary WorksheetSchool Site

B-6

Area Poly X Y

1 348252.9 3818178.32 348685.3 3818225.63 349000.5 3818141.84 348988.3 3818125.05 348685.3 3818207.46 348254.8 3818160.6

Volume SourcesX Y ZS ZS RH SY SZ

CHR_1 348267.2 3818171.8 0 576.83 5 8.51 1.40CHR_2 348285.4 3818173.6 0 583.92 5 8.51 1.40CHR_3 348303.6 3818175.3 0 585.33 5 8.51 1.40CHR_4 348321.8 3818177.1 0 581.99 5 8.51 1.40CHR_5 348340.0 3818178.9 0 573.90 5 8.51 1.40CHR_6 348358.2 3818180.6 0 570.25 5 8.51 1.40CHR_7 348376.4 3818182.4 0 567.13 5 8.51 1.40CHR_8 348394.4 3818184.6 0 564.49 5 8.51 1.40CHR_9 348412.6 3818187.4 0 562.11 5 8.51 1.40

CHR_10 348432.6 3818189.4 0 558.72 5 8.51 1.40CHR_11 348449.8 3818191.3 0 554.31 5 8.51 1.40CHR_12 348466.8 3818192.7 0 548.51 5 8.51 1.40CHR_13 348485.9 3818194.6 0 549.30 5 8.51 1.40CHR_14 348503.7 3818196.5 0 553.41 5 8.51 1.40CHR_15 348522.2 3818198.4 0 560.12 5 8.51 1.40CHR_16 348538.7 3818200.3 0 564.12 5 8.51 1.40CHR_17 348557.2 3818202.2 0 570.58 5 8.51 1.40CHR_18 348576.3 3818204.1 0 576.81 5 8.51 1.40CHR_19 348595.3 3818206.7 0 580.18 5 8.51 1.40CHR_20 348613.8 3818208.6 0 582.57 5 8.51 1.40CHR_21 348632.2 3818211.1 0 584.75 5 8.51 1.40CHR_22 348648.8 3818213.1 0 586.33 5 8.51 1.40CHR_23 348666.7 3818215.3 0 580.15 5 8.51 1.40CHR_24 348685.3 3818216.5 0 575.00 5 8.51 1.40CHR_25 348703.2 3818212.5 0 570.90 5 8.51 1.40CHR_26 348721.5 3818206.7 0 572.05 5 8.51 1.40CHR_27 348740.0 3818201.6 0 569.35 5 8.51 1.40CHR_28 348755.9 3818197.8 0 564.02 5 8.51 1.40CHR_29 348774.7 3818193.2 0 554.70 5 8.51 1.40CHR_30 348790.9 3818188.9 0 548.75 5 8.51 1.40CHR_31 348809.7 3818183.9 0 543.96 5 8.51 1.40CHR_32 348827.7 3818179.2 0 540.65 5 8.51 1.40CHR_33 348845.0 3818174.2 0 538.65 5 8.51 1.40CHR_34 348862.7 3818169.9 0 536.13 5 8.51 1.40CHR_35 348881.9 3818165.3 0 532.91 5 8.51 1.40

Source Data WorksheetCanyon Hill Road

B-7

CHR_36 348899.6 3818160.6 0 527.12 5 8.51 1.40CHR_37 348915.6 3818156.4 0 521.58 5 8.51 1.40CHR_38 348932.1 3818151.7 0 516.65 5 8.51 1.40CHR_39 348950.0 3818146.9 0 511.40 5 8.51 1.40CHR_40 348968.1 3818142.4 0 509.88 5 8.51 1.40CHR_41 348985.6 3818136.8 0 508.24 5 8.51 1.40

B-8

Area Poly X Y

1 348995.1 3818120.02 349010.9 3818137.33 349072.5 3818074.74 349166.2 3818028.75 349350.3 3817971.16 349512.2 3817940.27 349644.1 3817917.78 349847.4 3817895.69 349934.4 3817808.3

10 349997.3 3817720.511 350121.8 3817639.212 350110.7 3817620.113 349985.4 3817697.614 349916.8 3817788.915 349835.3 3817873.416 349640.2 3817893.817 349350.7 3817946.318 349240.5 3817976.519 349115.2 3818021.720 349057.2 3818054.8


SCR_E1 350108.4 3817638.4 0 420.57 5 11.34 1.40SCR_E2 350087.3 3817650.6 0 421.03 5 11.34 1.40SCR_E3 350066.2 3817662.8 0 421.02 5 11.34 1.40SCR_E4 350045.1 3817675.1 0 421.67 5 11.34 1.40SCR_E5 350024.0 3817687.3 0 426.01 5 11.34 1.40SCR_E6 350002.9 3817699.5 0 427.25 5 11.34 1.40SCR_E7 349986.0 3817716.5 0 425.81 5 11.34 1.40SCR_E8 349971.6 3817736.2 0 425.45 5 11.34 1.40SCR_E9 349957.2 3817755.9 0 425.86 5 11.34 1.40

SCR_E10 349942.8 3817775.6 0 426.85 5 11.34 1.40SCR_E11 349928.4 3817795.3 0 428.54 5 11.34 1.40SCR_E12 349912.0 3817813.3 0 430.28 5 11.34 1.40SCR_E13 349894.8 3817830.5 0 431.64 5 11.34 1.40SCR_E14 349877.5 3817847.8 0 432.96 5 11.34 1.40SCR_E15 349860.3 3817865.0 0 434.31 5 11.34 1.40SCR_E16 349843.0 3817882.3 0 435.68 5 11.34 1.40SCR_E17 349821.3 3817889.9 0 437.14 5 11.34 1.40SCR_E18 349797.0 3817891.8 0 438.48 5 11.34 1.40SCR_E19 349772.7 3817893.6 0 439.61 5 11.34 1.40SCR_E20 349748.3 3817895.4 0 440.68 5 11.34 1.40SCR_E21 349724.0 3817897.2 0 441.97 5 11.34 1.40

Source Data WorksheetSloan Canyon Road East

B-9

SCR_E22 349699.7 3817899.1 0 443.30 5 11.34 1.40SCR_E23 349675.3 3817900.9 0 444.71 5 11.34 1.40SCR_E24 349651.0 3817902.7 0 446.28 5 11.34 1.40SCR_E25 349627.1 3817907.3 0 448.11 5 11.34 1.40SCR_E26 349603.2 3817912.4 0 449.92 5 11.34 1.40SCR_E27 349579.4 3817917.5 0 451.41 5 11.34 1.40SCR_E28 349555.5 3817922.6 0 452.91 5 11.34 1.40SCR_E29 349531.6 3817927.7 0 455.13 5 11.34 1.40SCR_E30 349507.7 3817932.4 0 457.50 5 11.34 1.40SCR_E31 349483.6 3817936.1 0 459.23 5 11.34 1.40SCR_E32 349459.5 3817939.7 0 461.67 5 11.34 1.40SCR_E33 349435.3 3817943.4 0 466.74 5 11.34 1.40SCR_E34 349411.2 3817947.0 0 471.67 5 11.34 1.40SCR_E35 349387.1 3817950.7 0 473.94 5 11.34 1.40SCR_E36 349363.0 3817954.4 0 473.28 5 11.34 1.40SCR_E37 349339.5 3817960.8 0 472.87 5 11.34 1.40SCR_E38 349316.2 3817968.0 0 472.86 5 11.34 1.40SCR_E39 349292.9 3817975.2 0 474.20 5 11.34 1.40SCR_E40 349269.5 3817982.4 0 476.08 5 11.34 1.40SCR_E41 349246.2 3817989.6 0 477.74 5 11.34 1.40SCR_E42 349222.9 3817996.8 0 479.30 5 11.34 1.40SCR_E43 349199.6 3818004.0 0 481.21 5 11.34 1.40SCR_E44 349176.3 3818011.2 0 482.98 5 11.34 1.40SCR_E45 349153.6 3818020.2 0 485.08 5 11.34 1.40SCR_E46 349131.5 3818030.4 0 487.69 5 11.34 1.40SCR_E47 349109.4 3818040.7 0 491.53 5 11.34 1.40SCR_E48 349087.2 3818050.9 0 494.31 5 11.34 1.40SCR_E49 349066.1 3818062.6 0 495.75 5 11.34 1.40SCR_E50 349049.5 3818080.5 0 499.06 5 11.34 1.40SCR_E51 349032.8 3818098.3 0 500.43 5 11.34 1.40SCR_E52 349016.2 3818116.2 0 503.59 5 11.34 1.40

B-10

Area Poly X Y

1 348153.4 3817632.72 348168.2 3817623.13 348154.3 3817594.54 348107.7 3817538.95 348206.3 3817466.56 348338.7 3817343.17 348498.8 3817277.58 348548.1 3817210.19 348531.9 3817199.5

10 348487.0 3817260.711 348327.3 3817325.512 348233.1 3817414.713 348193.2 3817452.214 348080.3 3817536.415 348137.8 3817604.9


BRRCR_1 348536.2 3817211.4 0 505.74 5 9.07 1.40BRRCR_2 348524.7 3817227.2 0 507.71 5 9.07 1.40BRRCR_3 348513.2 3817242.9 0 509.44 5 9.07 1.40BRRCR_4 348501.7 3817258.7 0 510.59 5 9.07 1.40BRRCR_5 348487.6 3817271.1 0 511.44 5 9.07 1.40BRRCR_6 348469.5 3817278.5 0 513.11 5 9.07 1.40BRRCR_7 348451.5 3817285.9 0 516.26 5 9.07 1.40BRRCR_8 348433.5 3817293.4 0 518.75 5 9.07 1.40BRRCR_9 348415.5 3817300.8 0 520.07 5 9.07 1.40

BRRCR_10 348397.4 3817308.3 0 521.69 5 9.07 1.40BRRCR_11 348379.4 3817315.7 0 525.75 5 9.07 1.40BRRCR_12 348361.4 3817323.1 0 528.87 5 9.07 1.40BRRCR_13 348343.4 3817330.6 0 532.20 5 9.07 1.40BRRCR_14 348326.1 3817339.1 0 535.14 5 9.07 1.40BRRCR_15 348311.9 3817352.5 0 542.32 5 9.07 1.40BRRCR_16 348297.7 3817365.9 0 548.83 5 9.07 1.40BRRCR_17 348283.6 3817379.3 0 553.23 5 9.07 1.40BRRCR_18 348269.4 3817392.7 0 551.34 5 9.07 1.40BRRCR_19 348255.2 3817406.1 0 546.89 5 9.07 1.40BRRCR_20 348241.1 3817419.5 0 539.76 5 9.07 1.40BRRCR_21 348226.9 3817432.9 0 533.46 5 9.07 1.40BRRCR_22 348212.7 3817446.3 0 529.87 5 9.07 1.40BRRCR_23 348198.6 3817459.7 0 527.65 5 9.07 1.40BRRCR_24 348184.4 3817473.1 0 526.62 5 9.07 1.40BRRCR_25 348168.4 3817484.2 0 525.87 5 9.07 1.40BRRCR_26 348152.3 3817495.3 0 525.23 5 9.07 1.40

Source Data WorksheetBaringer Road / Romero Canyon Road Improvements

B-11

BRRCR_27 348136.2 3817506.3 0 524.21 5 9.07 1.40BRRCR_28 348120.1 3817517.3 0 523.42 5 9.07 1.40BRRCR_29 348104.0 3817528.3 0 524.04 5 9.07 1.40BRRCR_30 348094.4 3817540.1 0 526.50 5 9.07 1.40BRRCR_31 348107.4 3817554.6 0 525.13 5 9.07 1.40BRRCR_32 348120.5 3817569.1 0 525.58 5 9.07 1.40BRRCR_33 348133.5 3817583.6 0 526.01 5 9.07 1.40BRRCR_34 348146.6 3817598.1 0 526.61 5 9.07 1.40BRRCR_35 348157.2 3817620.6 0 528.34 5 9.07 1.40

B-12

Area Poly X Y

1 348535.2 3817191.32 348557.7 3817187.63 348495.9 3816934.04 348424.1 3816678.95 348345.5 3816050.26 348346.9 3815929.57 348320.0 3815930.38 348320.0 3816051.09 348362.4 3816383.1

10 348384.8 3816573.411 348400.3 3816682.912 348473.2 3816941.6


SCR_S1 348333.8 3815943.0 0 464.71 5 11.34 1.40SCR_S2 348333.8 3815966.4 0 465.35 5 11.34 1.40SCR_S3 348333.8 3815991.9 0 463.18 5 11.34 1.40SCR_S4 348333.8 3816015.4 0 462.11 5 11.34 1.40SCR_S5 348333.6 3816041.0 0 466.45 5 11.34 1.40SCR_S6 348335.8 3816065.2 0 466.20 5 11.34 1.40SCR_S7 348338.9 3816089.4 0 464.62 5 11.34 1.40SCR_S8 348341.9 3816113.6 0 464.22 5 11.34 1.40SCR_S9 348344.9 3816137.8 0 464.43 5 11.34 1.40

SCR_S10 348347.9 3816162.0 0 463.97 5 11.34 1.40SCR_S11 348350.9 3816186.2 0 464.57 5 11.34 1.40SCR_S12 348353.9 3816210.4 0 465.21 5 11.34 1.40SCR_S13 348356.9 3816234.7 0 464.65 5 11.34 1.40SCR_S14 348359.9 3816258.9 0 465.30 5 11.34 1.40SCR_S15 348362.9 3816283.1 0 466.64 5 11.34 1.40SCR_S16 348365.9 3816307.3 0 468.00 5 11.34 1.40SCR_S17 348368.9 3816331.5 0 469.58 5 11.34 1.40SCR_S18 348371.9 3816355.7 0 471.66 5 11.34 1.40SCR_S19 348374.7 3816380.0 0 472.77 5 11.34 1.40SCR_S20 348377.5 3816404.2 0 473.96 5 11.34 1.40SCR_S21 348380.3 3816428.4 0 475.32 5 11.34 1.40SCR_S22 348383.2 3816452.7 0 476.65 5 11.34 1.40SCR_S23 348386.0 3816476.9 0 477.66 5 11.34 1.40SCR_S24 348388.8 3816501.2 0 478.64 5 11.34 1.40SCR_S25 348391.9 3816525.3 0 479.56 5 11.34 1.40SCR_S26 348394.5 3816545.7 0 480.45 5 11.34 1.40SCR_S27 348396.4 3816565.3 0 481.50 5 11.34 1.40SCR_S28 348399.4 3816587.1 0 481.55 5 11.34 1.40SCR_S29 348402.3 3816610.3 0 481.73 5 11.34 1.40

Source Data WorksheetSloan Canyon Road South

B-13

SCR_S30 348406.2 3816633.8 0 482.35 5 11.34 1.40SCR_S31 348410.1 3816659.2 0 484.58 5 11.34 1.40SCR_S32 348416.0 3816682.7 0 485.04 5 11.34 1.40SCR_S33 348420.4 3816703.6 0 485.88 5 11.34 1.40SCR_S34 348427.0 3816727.0 0 487.00 5 11.34 1.40SCR_S35 348433.7 3816750.5 0 488.90 5 11.34 1.40SCR_S36 348440.4 3816774.0 0 489.21 5 11.34 1.40SCR_S37 348447.0 3816797.4 0 489.25 5 11.34 1.40SCR_S38 348453.7 3816820.9 0 489.77 5 11.34 1.40SCR_S39 348460.4 3816844.4 0 490.28 5 11.34 1.40SCR_S40 348467.0 3816867.9 0 490.99 5 11.34 1.40SCR_S41 348473.7 3816891.3 0 492.13 5 11.34 1.40SCR_S42 348480.4 3816914.8 0 493.73 5 11.34 1.40SCR_S43 348486.2 3816938.5 0 495.03 5 11.34 1.40SCR_S44 348491.9 3816962.2 0 496.75 5 11.34 1.40SCR_S45 348497.7 3816985.9 0 497.96 5 11.34 1.40SCR_S46 348503.4 3817009.7 0 498.83 5 11.34 1.40SCR_S47 348509.1 3817033.4 0 499.53 5 11.34 1.40SCR_S48 348514.8 3817057.1 0 500.21 5 11.34 1.40SCR_S49 348520.5 3817080.8 0 500.86 5 11.34 1.40SCR_S50 348526.2 3817104.5 0 501.60 5 11.34 1.40SCR_S51 348532.0 3817128.3 0 502.27 5 11.34 1.40SCR_S52 348537.7 3817152.0 0 502.28 5 11.34 1.40SCR_S53 348543.4 3817175.7 0 503.25 5 11.34 1.40

B-14

Area Poly X Y

1 347249.9 3818210.82 347345.4 3818320.33 347716.6 3818432.54 347881.4 3818441.85 348249.5 3818344.86 348345.0 3818206.37 348331.1 3817819.88 348164.8 3817639.59 347778.2 3817636.3

10 347488.6 3817832.011 347537.9 3817967.512 347642.6 3818066.0

Volume Sources

Source ID X Y ZS ZS RH SY SZ

V1 347800.0 3817665.0 0 580.72 5 23.3 1.4V2 347850.0 3817665.0 0 582.83 5 23.3 1.4V3 347900.0 3817665.0 0 577.35 5 23.3 1.4V4 347950.0 3817665.0 0 571.36 5 23.3 1.4V5 348000.0 3817665.0 0 565.86 5 23.3 1.4V6 348050.0 3817665.0 0 557.66 5 23.3 1.4V7 348100.0 3817665.0 0 538.10 5 23.3 1.4V8 348150.0 3817665.0 0 529.28 5 23.3 1.4V9 347700.0 3817715.0 0 595.23 5 23.3 1.4

V10 347750.0 3817715.0 0 593.79 5 23.3 1.4V11 347800.0 3817715.0 0 578.69 5 23.3 1.4V12 347850.0 3817715.0 0 570.23 5 23.3 1.4V13 347900.0 3817715.0 0 567.27 5 23.3 1.4V14 347950.0 3817715.0 0 561.79 5 23.3 1.4V15 348000.0 3817715.0 0 555.13 5 23.3 1.4V16 348050.0 3817715.0 0 549.08 5 23.3 1.4V17 348100.0 3817715.0 0 534.04 5 23.3 1.4V18 348150.0 3817715.0 0 531.97 5 23.3 1.4V19 348200.0 3817715.0 0 538.82 5 23.3 1.4V20 347650.0 3817765.0 0 614.93 5 23.3 1.4V21 347700.0 3817765.0 0 617.27 5 23.3 1.4V22 347750.0 3817765.0 0 597.31 5 23.3 1.4V23 347800.0 3817765.0 0 579.87 5 23.3 1.4V24 347850.0 3817765.0 0 564.39 5 23.3 1.4V25 347900.0 3817765.0 0 556.45 5 23.3 1.4V26 347950.0 3817765.0 0 550.58 5 23.3 1.4V27 348000.0 3817765.0 0 545.17 5 23.3 1.4V28 348050.0 3817765.0 0 541.47 5 23.3 1.4

Source Data WorksheetSchool Site (Site Preparation/Clearing/Grading)

B-15

V29 348100.0 3817765.0 0 535.52 5 23.3 1.4V30 348150.0 3817765.0 0 534.55 5 23.3 1.4V31 348200.0 3817765.0 0 539.36 5 23.3 1.4V32 348250.0 3817765.0 0 547.20 5 23.3 1.4V33 347550.0 3817815.0 0 642.32 5 23.3 1.4V34 347600.0 3817815.0 0 640.17 5 23.3 1.4V35 347650.0 3817815.0 0 632.95 5 23.3 1.4V36 347700.0 3817815.0 0 620.04 5 23.3 1.4V37 347750.0 3817815.0 0 608.19 5 23.3 1.4V38 347800.0 3817815.0 0 591.57 5 23.3 1.4V39 347850.0 3817815.0 0 577.91 5 23.3 1.4V40 347900.0 3817815.0 0 565.84 5 23.3 1.4V41 347950.0 3817815.0 0 553.95 5 23.3 1.4V42 348000.0 3817815.0 0 547.17 5 23.3 1.4V43 348050.0 3817815.0 0 542.40 5 23.3 1.4V44 348100.0 3817815.0 0 538.73 5 23.3 1.4V45 348150.0 3817815.0 0 537.99 5 23.3 1.4V46 348200.0 3817815.0 0 544.06 5 23.3 1.4V47 348250.0 3817815.0 0 556.17 5 23.3 1.4V48 348300.0 3817815.0 0 565.61 5 23.3 1.4V49 347550.0 3817865.0 0 630.85 5 23.3 1.4V50 347600.0 3817865.0 0 614.60 5 23.3 1.4V51 347650.0 3817865.0 0 606.83 5 23.3 1.4V52 347700.0 3817865.0 0 595.52 5 23.3 1.4V53 347750.0 3817865.0 0 586.07 5 23.3 1.4V54 347800.0 3817865.0 0 579.22 5 23.3 1.4V55 347850.0 3817865.0 0 567.18 5 23.3 1.4V56 347900.0 3817865.0 0 559.36 5 23.3 1.4V57 347950.0 3817865.0 0 554.98 5 23.3 1.4V58 348000.0 3817865.0 0 550.25 5 23.3 1.4V59 348050.0 3817865.0 0 543.80 5 23.3 1.4V60 348100.0 3817865.0 0 542.56 5 23.3 1.4V61 348150.0 3817865.0 0 538.77 5 23.3 1.4V62 348200.0 3817865.0 0 547.86 5 23.3 1.4V63 348250.0 3817865.0 0 559.27 5 23.3 1.4V64 348300.0 3817865.0 0 576.36 5 23.3 1.4V65 347550.0 3817915.0 0 606.60 5 23.3 1.4V66 347600.0 3817915.0 0 599.57 5 23.3 1.4V67 347650.0 3817915.0 0 587.37 5 23.3 1.4V68 347700.0 3817915.0 0 580.30 5 23.3 1.4V69 347750.0 3817915.0 0 573.42 5 23.3 1.4V70 347800.0 3817915.0 0 569.76 5 23.3 1.4V71 347850.0 3817915.0 0 562.97 5 23.3 1.4V72 347900.0 3817915.0 0 556.75 5 23.3 1.4V73 347950.0 3817915.0 0 553.24 5 23.3 1.4V74 348000.0 3817915.0 0 549.92 5 23.3 1.4V75 348050.0 3817915.0 0 544.75 5 23.3 1.4V76 348100.0 3817915.0 0 542.53 5 23.3 1.4V77 348150.0 3817915.0 0 545.00 5 23.3 1.4V78 348200.0 3817915.0 0 556.37 5 23.3 1.4V79 348250.0 3817915.0 0 563.28 5 23.3 1.4V80 348300.0 3817915.0 0 577.84 5 23.3 1.4V81 347600.0 3817965.0 0 591.16 5 23.3 1.4

B-16

V82 347650.0 3817965.0 0 586.57 5 23.3 1.4V83 347700.0 3817965.0 0 584.05 5 23.3 1.4V84 347750.0 3817965.0 0 585.62 5 23.3 1.4V85 347800.0 3817965.0 0 579.84 5 23.3 1.4V86 347850.0 3817965.0 0 566.83 5 23.3 1.4V87 347900.0 3817965.0 0 557.79 5 23.3 1.4V88 347950.0 3817965.0 0 552.35 5 23.3 1.4V89 348000.0 3817965.0 0 549.05 5 23.3 1.4V90 348050.0 3817965.0 0 549.46 5 23.3 1.4V91 348100.0 3817965.0 0 542.54 5 23.3 1.4V92 348150.0 3817965.0 0 550.13 5 23.3 1.4V93 348200.0 3817965.0 0 568.23 5 23.3 1.4V94 348250.0 3817965.0 0 579.62 5 23.3 1.4V95 348300.0 3817965.0 0 580.48 5 23.3 1.4V96 347650.0 3818015.0 0 597.92 5 23.3 1.4V97 347700.0 3818015.0 0 600.07 5 23.3 1.4V98 347750.0 3818015.0 0 605.27 5 23.3 1.4V99 347800.0 3818015.0 0 587.60 5 23.3 1.4

V100 347850.0 3818015.0 0 570.09 5 23.3 1.4V101 347900.0 3818015.0 0 556.76 5 23.3 1.4V102 347950.0 3818015.0 0 554.26 5 23.3 1.4V103 348000.0 3818015.0 0 561.24 5 23.3 1.4V104 348050.0 3818015.0 0 552.78 5 23.3 1.4V105 348100.0 3818015.0 0 543.93 5 23.3 1.4V106 348150.0 3818015.0 0 549.21 5 23.3 1.4V107 348200.0 3818015.0 0 556.09 5 23.3 1.4V108 348250.0 3818015.0 0 570.80 5 23.3 1.4V109 348300.0 3818015.0 0 580.48 5 23.3 1.4V110 347700.0 3818065.0 0 616.99 5 23.3 1.4V111 347750.0 3818065.0 0 603.64 5 23.3 1.4V112 347800.0 3818065.0 0 579.15 5 23.3 1.4V113 347850.0 3818065.0 0 563.85 5 23.3 1.4V114 347900.0 3818065.0 0 558.40 5 23.3 1.4V115 347950.0 3818065.0 0 564.77 5 23.3 1.4V116 348000.0 3818065.0 0 569.24 5 23.3 1.4V117 348050.0 3818065.0 0 554.32 5 23.3 1.4V118 348100.0 3818065.0 0 545.91 5 23.3 1.4V119 348150.0 3818065.0 0 555.62 5 23.3 1.4V120 348200.0 3818065.0 0 566.97 5 23.3 1.4V121 348250.0 3818065.0 0 570.85 5 23.3 1.4V122 348300.0 3818065.0 0 583.86 5 23.3 1.4V123 347550.0 3818115.0 0 636.38 5 23.3 1.4V124 347600.0 3818115.0 0 639.98 5 23.3 1.4V125 347650.0 3818115.0 0 621.57 5 23.3 1.4V126 347700.0 3818115.0 0 600.48 5 23.3 1.4V127 347750.0 3818115.0 0 585.25 5 23.3 1.4V128 347800.0 3818115.0 0 574.20 5 23.3 1.4V129 347850.0 3818115.0 0 564.23 5 23.3 1.4V130 347900.0 3818115.0 0 565.02 5 23.3 1.4V131 347950.0 3818115.0 0 577.14 5 23.3 1.4V132 348000.0 3818115.0 0 574.36 5 23.3 1.4V133 348050.0 3818115.0 0 556.19 5 23.3 1.4V134 348100.0 3818115.0 0 548.41 5 23.3 1.4

B-17


B-18

V188 347850.0 3818265.0 0 571.56 5 23.3 1.4V189 347900.0 3818265.0 0 585.05 5 23.3 1.4V190 347950.0 3818265.0 0 596.99 5 23.3 1.4V191 348000.0 3818265.0 0 581.85 5 23.3 1.4V192 348050.0 3818265.0 0 567.85 5 23.3 1.4V193 348100.0 3818265.0 0 555.01 5 23.3 1.4V194 348150.0 3818265.0 0 562.05 5 23.3 1.4V195 348200.0 3818265.0 0 572.59 5 23.3 1.4V196 348250.0 3818265.0 0 577.25 5 23.3 1.4V197 347400.0 3818315.0 0 672.69 5 23.3 1.4V198 347450.0 3818315.0 0 658.19 5 23.3 1.4V199 347500.0 3818315.0 0 647.00 5 23.3 1.4V200 347550.0 3818315.0 0 637.96 5 23.3 1.4V201 347600.0 3818315.0 0 624.95 5 23.3 1.4V202 347650.0 3818315.0 0 614.66 5 23.3 1.4V203 347700.0 3818315.0 0 604.30 5 23.3 1.4V204 347750.0 3818315.0 0 606.20 5 23.3 1.4V205 347800.0 3818315.0 0 592.96 5 23.3 1.4V206 347850.0 3818315.0 0 575.35 5 23.3 1.4V207 347900.0 3818315.0 0 589.50 5 23.3 1.4V208 347950.0 3818315.0 0 597.39 5 23.3 1.4V209 348000.0 3818315.0 0 578.34 5 23.3 1.4V210 348050.0 3818315.0 0 567.83 5 23.3 1.4V211 348100.0 3818315.0 0 557.57 5 23.3 1.4V212 348150.0 3818315.0 0 561.41 5 23.3 1.4V213 348200.0 3818315.0 0 568.27 5 23.3 1.4V214 348250.0 3818315.0 0 575.87 5 23.3 1.4V215 347550.0 3818365.0 0 634.66 5 23.3 1.4V216 347600.0 3818365.0 0 623.70 5 23.3 1.4V217 347650.0 3818365.0 0 617.13 5 23.3 1.4V218 347700.0 3818365.0 0 611.64 5 23.3 1.4V219 347750.0 3818365.0 0 603.54 5 23.3 1.4V220 347800.0 3818365.0 0 584.91 5 23.3 1.4V221 347850.0 3818365.0 0 577.23 5 23.3 1.4V222 347900.0 3818365.0 0 595.37 5 23.3 1.4V223 347950.0 3818365.0 0 593.00 5 23.3 1.4V224 348000.0 3818365.0 0 580.67 5 23.3 1.4V225 348050.0 3818365.0 0 567.33 5 23.3 1.4V226 348100.0 3818365.0 0 557.21 5 23.3 1.4V227 347700.0 3818415.0 0 603.32 5 23.3 1.4V228 347750.0 3818415.0 0 597.03 5 23.3 1.4V229 347800.0 3818415.0 0 584.78 5 23.3 1.4V230 347850.0 3818415.0 0 582.24 5 23.3 1.4V231 347900.0 3818415.0 0 603.34 5 23.3 1.4V232 347950.0 3818415.0 0 600.37 5 23.3 1.4

B-19

Area Poly X Y

1 347716.6 3818432.52 347881.4 3818441.83 348249.5 3818344.84 348345.0 3818206.35 348331.1 3817819.86 348164.8 3817639.57 347778.2 3817636.38 347488.6 3817832.09 347537.9 3817967.5

10 347642.6 3818066.0

Volume Sources

Source ID X Y ZS ZS RH SY SZ

V1 347800.0 3817665.0 0 580.72 5 23.3 1.4V2 347850.0 3817665.0 0 582.83 5 23.3 1.4V3 347900.0 3817665.0 0 577.35 5 23.3 1.4V4 347950.0 3817665.0 0 571.36 5 23.3 1.4V5 348000.0 3817665.0 0 565.86 5 23.3 1.4V6 348050.0 3817665.0 0 557.66 5 23.3 1.4V7 348100.0 3817665.0 0 538.10 5 23.3 1.4V8 348150.0 3817665.0 0 529.28 5 23.3 1.4V9 347700.0 3817715.0 0 595.23 5 23.3 1.4

V10 347750.0 3817715.0 0 593.79 5 23.3 1.4V11 347800.0 3817715.0 0 578.69 5 23.3 1.4V12 347850.0 3817715.0 0 570.23 5 23.3 1.4V13 347900.0 3817715.0 0 567.27 5 23.3 1.4V14 347950.0 3817715.0 0 561.79 5 23.3 1.4V15 348000.0 3817715.0 0 555.13 5 23.3 1.4V16 348050.0 3817715.0 0 549.08 5 23.3 1.4V17 348100.0 3817715.0 0 534.04 5 23.3 1.4V18 348150.0 3817715.0 0 531.97 5 23.3 1.4V19 348200.0 3817715.0 0 538.82 5 23.3 1.4V20 347650.0 3817765.0 0 614.93 5 23.3 1.4V21 347700.0 3817765.0 0 617.27 5 23.3 1.4V22 347750.0 3817765.0 0 597.31 5 23.3 1.4V23 347800.0 3817765.0 0 579.87 5 23.3 1.4V24 347850.0 3817765.0 0 564.39 5 23.3 1.4V25 347900.0 3817765.0 0 556.45 5 23.3 1.4V26 347950.0 3817765.0 0 550.58 5 23.3 1.4V27 348000.0 3817765.0 0 545.17 5 23.3 1.4V28 348050.0 3817765.0 0 541.47 5 23.3 1.4V29 348100.0 3817765.0 0 535.52 5 23.3 1.4V30 348150.0 3817765.0 0 534.55 5 23.3 1.4

Source Data WorksheetSchool Site (Trenching/Utilities/Building Construction/Paving)

B-20


B-21

V84 347750.0 3817965.0 0 585.62 5 23.3 1.4V85 347800.0 3817965.0 0 579.84 5 23.3 1.4V86 347850.0 3817965.0 0 566.83 5 23.3 1.4V87 347900.0 3817965.0 0 557.79 5 23.3 1.4V88 347950.0 3817965.0 0 552.35 5 23.3 1.4V89 348000.0 3817965.0 0 549.05 5 23.3 1.4V90 348050.0 3817965.0 0 549.46 5 23.3 1.4V91 348100.0 3817965.0 0 542.54 5 23.3 1.4V92 348150.0 3817965.0 0 550.13 5 23.3 1.4V93 348200.0 3817965.0 0 568.23 5 23.3 1.4V94 348250.0 3817965.0 0 579.62 5 23.3 1.4V95 348300.0 3817965.0 0 580.48 5 23.3 1.4V96 347650.0 3818015.0 0 597.92 5 23.3 1.4V97 347700.0 3818015.0 0 600.07 5 23.3 1.4V98 347750.0 3818015.0 0 605.27 5 23.3 1.4V99 347800.0 3818015.0 0 587.60 5 23.3 1.4

V100 347850.0 3818015.0 0 570.09 5 23.3 1.4V101 347900.0 3818015.0 0 556.76 5 23.3 1.4V102 347950.0 3818015.0 0 554.26 5 23.3 1.4V103 348000.0 3818015.0 0 561.24 5 23.3 1.4V104 348050.0 3818015.0 0 552.78 5 23.3 1.4V105 348100.0 3818015.0 0 543.93 5 23.3 1.4V106 348150.0 3818015.0 0 549.21 5 23.3 1.4V107 348200.0 3818015.0 0 556.09 5 23.3 1.4V108 348250.0 3818015.0 0 570.80 5 23.3 1.4V109 348300.0 3818015.0 0 580.48 5 23.3 1.4V110 347700.0 3818065.0 0 616.99 5 23.3 1.4V111 347750.0 3818065.0 0 603.64 5 23.3 1.4V112 347800.0 3818065.0 0 579.15 5 23.3 1.4V113 347850.0 3818065.0 0 563.85 5 23.3 1.4V114 347900.0 3818065.0 0 558.40 5 23.3 1.4V115 347950.0 3818065.0 0 564.77 5 23.3 1.4V116 348000.0 3818065.0 0 569.24 5 23.3 1.4V117 348050.0 3818065.0 0 554.32 5 23.3 1.4V118 348100.0 3818065.0 0 545.91 5 23.3 1.4V119 348150.0 3818065.0 0 555.62 5 23.3 1.4V120 348200.0 3818065.0 0 566.97 5 23.3 1.4V121 348250.0 3818065.0 0 570.85 5 23.3 1.4V122 348300.0 3818065.0 0 583.86 5 23.3 1.4V123 347656.9 3818115.1 0 618.02 5 23.3 1.4V124 347700.0 3818115.0 0 600.48 5 23.3 1.4V125 347750.0 3818115.0 0 585.25 5 23.3 1.4V126 347800.0 3818115.0 0 574.20 5 23.3 1.4V127 347850.0 3818115.0 0 564.23 5 23.3 1.4V128 347900.0 3818115.0 0 565.02 5 23.3 1.4V129 347950.0 3818115.0 0 577.14 5 23.3 1.4V130 348000.0 3818115.0 0 574.36 5 23.3 1.4V131 348050.0 3818115.0 0 556.19 5 23.3 1.4V132 348100.0 3818115.0 0 548.41 5 23.3 1.4V133 348150.0 3818115.0 0 553.53 5 23.3 1.4V134 348200.0 3818115.0 0 560.42 5 23.3 1.4V135 348250.0 3818115.0 0 569.88 5 23.3 1.4V136 348300.0 3818115.0 0 585.60 5 23.3 1.4

B-22


B-23

V190 347850.0 3818365.0 0 577.23 5 23.3 1.4V191 347900.0 3818365.0 0 595.37 5 23.3 1.4V192 347950.0 3818365.0 0 593.00 5 23.3 1.4V193 348000.0 3818365.0 0 580.67 5 23.3 1.4V194 348050.0 3818365.0 0 567.33 5 23.3 1.4V195 348100.0 3818365.0 0 557.21 5 23.3 1.4V196 347750.0 3818415.0 0 597.03 5 23.3 1.4V197 347800.0 3818415.0 0 584.78 5 23.3 1.4V198 347850.0 3818415.0 0 582.24 5 23.3 1.4V199 347900.0 3818415.0 0 603.34 5 23.3 1.4V200 347950.0 3818415.0 0 600.37 5 23.3 1.4

B-24

APPENDIX C

Source-Receptor Grid Networks

C

Figure C1 Source-Receptor Grid Network-Access Roads

Site Preparation/Clearing/Grading/Paving

Canyon Hill Road


Baringer Road / Romero Canyon Road


Legend: ▬ Area Source Boundary ● Volume Source Locations ▬ School Site Boundary ● Receptor Locations

Figure C2 Source-Receptor Grid Network-School Site

Site Preparation/Clearing/Grading

Legend: ▬ Area Source Boundary ● Volume Source Locations ● Receptor Locations

Figure C3 Source-Receptor Grid Network-School Site

Trenching/Utilities/Building Construction/Paving

Legend: ▬ Area Source Boundary ● Volume Source Locations ● Receptor Locations

D

APPENDIX D

Dispersion Model Input/Output Files (Electronic Format)

4.1b Letters from Caterpillar, Inc.

Documents

APPENDIX 4.1 Air Quality Reports and Correspondence€¦ · SCAQMD Rule 403 (Fugitive Dust). The threshold for PM2.5 is designed to limit emissions and allow progress toward attainment