Appendix I Noise Background and Modeling Data

SERRANO II RESIDENTIAL PROJECT REVISED INITIAL STUDY/MITIGATED NEGATIVE DECLARATION CITY OF CLAREMONT Appendix Appendix I Noise Background and Modeling Data March 2015

SERRANO II RESIDENTIAL PROJECT REVISED INITIAL STUDY/MITIGATED NEGATIVE DECLARATION CITY OF CLAREMONT Appendix This page intentionally left blank. PlaceWorks

D.R. HORTON SERRANO PHASE II RESIDENTIAL PROJECT INITIAL STUDY CITY OF CLAREMONT Noise Background and Modeling Data Noise CHARACTERISTICS OF SOUND Sound is a pressure wave transmitted through the air. When an object vibrates, it radiates part of its energy as acoustical pressure in the form of a sound wave. Sound can be described in terms of amplitude (loudness), frequency (pitch), or duration (time). The standard unit of measurement of the loudness of sound is the decibel (db). The human hearing system is not equally sensitive to sound at all frequencies. Sound waves below 16 Hz are not heard at all and are "felt" more as a vibration. Similarly, while people with extremely sensitive hearing can hear sounds as high as 20,000 Hz, most people cannot hear above 15,000 Hz. In all cases, hearing acuity falls off rapidly above about 10,000 Hz and below about 200 Hz. Since the human ear is not equally sensitive to sound at all frequencies, a special frequency-dependent rating scale is usually used to relate noise to human sensitivity. The A-weighted decibel scale (dba) performs this compensation by discriminating against frequencies in a manner approximating the sensitivity of the human ear. Because of the physical characteristics of noise transmission and noise perception, the relative loudness of sound does not closely match the actual amounts of sound energy. Table 1, Change in Sound Pressure Level, db, presents the subjective effect of changes in sound pressure levels. Typical human hearing can detect changes of approximately 3 dba or greater under normal conditions. Changes of 1 to 3 dba are detectable under quiet, controlled conditions and changes of less than 1 dba are usually indiscernible. A change of 5 dba or greater is typically noticeable to most people in an exterior environment and a change of 10 dba is perceived as a doubling (or halving) of the noise. Table 1 Change in Sound Pressure Level, db Change in Apparent Loudness ± 3 db Threshold of human perceptibility ± 5 db Clearly noticeable change in noise level ± 10 db Half or twice as loud ± 20 db Much quieter or louder Source: Bies and Hansen, Engineering Noise Control, 1988. POINT AND LINE SOURCES Noise may be generated from a point source, such as a piece of construction equipment, or from a line source, such as a road containing moving vehicles. Because noise spreads in an ever-widening pattern, the given amount of noise striking an object, such as an eardrum, is reduced with distance from the source. This Noise Background and Modeling Data The Planning Center DC&E January 2014 Page 1 I-1

D.R. HORTON SERRANO PHASE II RESIDENTIAL PROJECT INITIAL STUDY CITY OF CLAREMONT is known as "spreading loss." The typical spreading loss for point source noise is 6 dba per doubling of the distance from the noise source. A line source of noise, such as vehicles proceeding down a roadway, would also be reduced with distance, but the rate of reduction is affected by of both distance and the type of terrain over which the noise passes. Hard sites, such as developed areas with paving, reduce noise at a rate of 3 dba per doubling of the distance while soft sites, such as undeveloped areas, open space and vegetated areas reduce noise at a rate of 4.5 dba per doubling of the distance. These represent the extremes and most areas would actually contain a combination of hard and soft elements with the noise reduction placed somewhere in between these two factors. Unfortunately the only way to actually determine the absolute amount of attenuation that an area provides is through field measurement under operating conditions with subsequent noise level measurements conducted at varying distances from a constant noise source. Objects that block the line of sight attenuate the noise source if the receptor is located within the "shadow" of the blockage (such as behind a sound wall). If a receptor is located behind the wall, but has a view of the source, the wall would do little to reduce the noise. Additionally, a receptor located on the same side of the wall as the noise source may experience an increase in the perceived noise level, as the wall would reflect noise back to the receptor compounding the noise. NOISE METRICS Several rating scales (or noise "metrics") exist to analyze adverse effects of noise, including traffic-generated noise, on a community. These scales include the equivalent noise level (L eq ), the community noise equivalent level (CNEL) and the day/night noise level (L dn ). L eq is a measurement of the sound energy level averaged over a specified time period. The CNEL noise metric is based on 24 hours of measurement. CNEL differs from L eq in that it applies a time-weighted factor designed to emphasize noise events that occur during the evening and nighttime hours (when quiet time and sleep disturbance is of particular concern). Noise occurring during the daytime period (7:00 AM to 7:00 PM) receives no penalty. Noise produced during the evening time period (7:00 to 10:00 PM) is penalized by 5 db, while nighttime (10:00 PM to 7:00 AM) noise is penalized by 10 db. The L dn noise metric is similar to the CNEL metric except that the period from 7:00 to 10:00 PM receives no penalty. Both the CNEL and L dn metrics yield approximately the same 24-hour value (within 1 db) with the CNEL being the more restrictive (i.e., higher) of the two. REGULATORY ENVIRONMENT State of California Noise Compatibility Standards Cities and counties in California are preempted by federal law from controlling noise generated from most mobile sources, including noise generated by vehicles and trucks on the roadway, trains on the railroad, and airplanes. Table 2, Land Use Compatibility for Community Noise Environments, presents a land use compatibility chart for community noise adopted by the California Office of Noise Control. This table provides urban planners with a tool to gauge the compatibility of land uses relative to existing and future noise levels generated by mobile sources. Land uses, such as offices and commercial, are "normally acceptable" in exterior noise environments up to 70 dba CNEL and "conditionally acceptable" in areas up to 77.5 dba Noise Background and Modeling Data The Planning Center DC&E January 2014 Page 2 I-2

D.R. HORTON SERRANO PHASE II RESIDENTIAL PROJECT INITIAL STUDY CITY OF CLAREMONT Table 2 Land Use Compatibility for Community Noise Environments Land Uses CNEL (dba) 55 60 65 70 75 80 Residential-Low Density Single Family, Duplex, Mobile Homes Residential- Multiple Family Transient Lodging, Motels, Hotels Schools, Libraries, Churches, Hospitals, Nursing Homes Auditoriums, Concert Halls, Amphitheaters Sports Arena, Outdoor Spectator Sports Playgrounds, Neighborhood Parks Golf Courses, Riding Stables, Water Recreation, Cemeteries Office Buildings, Businesses, Commercial and Professional Industrial, Manufacturing, Utilities, Agricultural Normally Acceptable: Specified land use is satisfactory based upon the assumption that any buildings involved are of normal conventional construction, without any special noise insulation requirements. Normally Unacceptable: New construction or development should generally be discouraged. If new construction does proceed, a detailed analysis of the noise reduction requirements must be made and needed noise insulation features included in the design. Conditionally Acceptable: New construction or development should be undertaken only after a detailed analysis of the noise reduction requirements is made and the needed noise insulation features included in the design. Conventional construction, but with closed windows and fresh air supply systems or air conditioning will normally suffice. Clearly Unacceptable: New construction or development generally should not be undertaken. Source: Office of Noise Control, Guidelines for the Preparation and Content of Noise Elements of the General Plan, February 1976. Included in the Governor s Office of Planning and Research, California, General Plan Guidelines, Appendix C, October 2003. Noise Background and Modeling Data The Planning Center DC&E January 2014 Page 3 I-3

D.R. HORTON SERRANO PHASE II RESIDENTIAL PROJECT INITIAL STUDY CITY OF CLAREMONT CNEL. A "conditionally acceptable" designation implies that new construction or development should be undertaken only after a detailed analysis of the noise reduction requirements for each land use type is made and needed noise insulation features are incorporated in the design. By comparison, a "normally acceptable" designation indicates that standard construction can occur with no special noise reduction requirements. California Building Code Noise standards have been incorporated as part of the California Building Code and California Noise Insulation Standards (Title 24 and 25, California Code of Regulations) and are the noise standards required for new construction in California. The California Administrative Code, Title 24, Part 2 requires that the interior noise levels in multifamily residential uses not exceed 45 dba CNEL or L dn ; this is commonly used as an interior standard for all residential uses. Title 21, Subchapter 6 of the California Code of Regulations (Airport Noise Standards) establishes 65 dba CNEL as the acceptable level of aircraft noise for persons living in the vicinity of airports. Noise-sensitive land uses in locations where the aircraft exterior noise level exceeds 65 dba CNEL are generally incompatible, unless (1) an aviation easement for aircraft noise has been acquired by the airport proprietor or (2) the residence is a high-rise apartment or condominium that has an interior CNEL of 45 dba or less in all habitable rooms despite aircraft noise and an air circulation or air conditioning system, as appropriate. Assembly Bill (AB) 2776 requires any person who intends to sell or lease residential properties within an airport influence area to disclose that fact to the person buying the property. City of Claremont Noise Standards Table 6-5 of the City of Claremont Public and Safety Noise Element shows exterior and interior noise standards for several land use types. For residential exterior areas, the noise standard is 65 dba CNEL, and for interior areas 45 dba CNEL. Stationary Noise Nuisance The City of Claremont noise and vibration regulation is provided in Section 15.154.020 of the Municipal Code. The city applies the noise control ordinance standards to nontransportation noise sources. The standards are as follows: Base Noise Level for a cumulative period of more than 15 minutes in any one hour; or Base Noise Level plus 5 dba for a cumulative period of more than 10 minutes in any one hour; or Base Noise Level plus 14 dba for cumulative period of more than 5 minutes in any one hour; or Base Noise Level plus 15 dba at any time. The Base Noise Level is either the actual measured ambient noise level or the Ambient Base Noise Level, whichever is higher. The Actual Base Noise Levels are the assume minimum ambient noise level. These standards establish the maximum permissible noise level that may intrude into a neighbor s property. The intent is to limit intrusive noise (e.g. air conditioning units, machinery, parties, amplified sound, etc.) that exceeds the ambient noise levels within the zones specified. Table 3, City of Claremont Maximum Allowable Exterior Noise Standards, shows the standards based on the Ambient Base Noise Level. Noise Background and Modeling Data The Planning Center DC&E January 2014 Page 4 I-4

D.R. HORTON SERRANO PHASE II RESIDENTIAL PROJECT INITIAL STUDY CITY OF CLAREMONT Table 3 City of Claremont Maximum Allowable Exterior Noise Standards Zone 1 Type of Land Use Time Interval Ambient Base Noise Level (dba Leq) 2 L25 L16 L8 Lmax I Single, double, or multiple family 10:00 PM to 7:00 AM 55 55 60 69 70 residential (RS, HC, RR, AV, H, or RM) 7:00 AM to 10:00 PM 60 60 65 74 75 II Commercial (CP, CN, CL, CH, CV, and 10:00 PM to 7:00 AM 60 60 65 74 75 CF) 7:00 AM to 10:00 PM 65 65 70 79 80 III Industrial (B/IP) Anytime 70 70 75 84 80 Source: City of Claremont, Municipal Code, Title 16, Chapter 16.154, Environmental Protective Standards Notes: 1 Noise Zone I: All single, double, and multiple family residential properties; Noise Zone II: All commercial properties; Noise Zone III: All manufacturing or industrial properties. Construction Noise Section 16.154.020 (Noise and Vibration Standards) of the City of Claremont s Municipal Code limits the hours for construction to the least noise-sensitive portions of the day from 7:00 AM to 8:00 PM Monday through Saturdays. Construction activity is not permitted on Sundays and national holidays. Vibration Perceptibility Section 16.154.020(J) of the City of Claremont s Municipal Code establishes a vibration perception threshold of 0.05 inch per second RMS (root mean square) vertical velocity. Federal Transit Administration Vibration Criteria The Federal Transit Administration (FTA) provides criteria for acceptable levels of groundborne vibration related to architectural damage for various types of land uses that are sensitive to vibration. Structures amplify groundborne vibration with typical residential structures more affected by ground vibration than heavier buildings. The level at which groundborne vibration is strong enough to cause architectural damage has not been determined conclusively. The most conservative estimates are reflected in the FTA standards, shown in Table 4, Groundborne Vibration Impact Criteria: Architectural Damage. Table 4 Groundborne Vibration Impact Criteria: Architectural Damage Building Category PPV (in/sec) I. Reinforced concrete, steel, or timber (no plaster) 0.5 II. Engineered concrete and masonry (no plaster) 0.3 III. Non-engineered timber and masonry buildings 0.2 IV. Buildings extremely susceptible to vibration damage 0.12 Source: FTA 2006. Sensitive Noise Receptors Certain land uses are particularly sensitive to noise and vibration. Noise- and vibration-sensitive uses include land uses where quiet environments are necessary for enjoyment and public health and safety. Residences, schools, guest lodging, libraries, religious institutions, hospitals, nursing homes, and passive recreation areas Noise Background and Modeling Data The Planning Center DC&E January 2014 Page 5 I-5

D.R. HORTON SERRANO PHASE II RESIDENTIAL PROJECT INITIAL STUDY CITY OF CLAREMONT are generally more sensitive to noise than commercial and industrial land use. The nearest sensitive receptors are the residences north of the project site across Baseline Road. References Bies, David A. and Colin H. Hansen. 2003. Engineering Noise Control: Theory and Practice. 3rd ed. New York: Spoon Press. Claremont, City of. City of Claremont General Plan, Public Safety and Noise Element.. 2014, January. Municipal Code, City of Claremont, California. Federal Transit Administration (FTA). 2006, May. Transit Noise and Vibration Impact Assessment. United States Department of Transportation. FTA-VA-90-1003-06. Governor s Office of Planning and Research. 2003, October. State of California General Plan Guidelines. Noise Background and Modeling Data The Planning Center DC&E January 2014 Page 6 I-6

Construction Generated Vibration Vibration Annoyance Criteria Receptor: Maximum Vibration Level - Northern Residences Closest Distance (feet): 110 Approximate Velocity Approximate Velocity Equipment Level at 25 ft, VdB Level, VdB Caisson Drill 87 74 Vibratory Roller 94 81 Large bulldozer 87 74 Small bulldozer 58 45 Jackhammer 79 66 Loaded trucks 86 73 City of Claremont Vibration Perceptibility Criteria 94 Structural Damage Criteria Receptor: Maximum Vibration Levels - Northern Residences Closest Distance (feet): 110 Approximate Peak Particle Approximate RMS Velocity at 25 ft, Velocity Level, Equipment inch/second inch/second Caisson Drill 0.089 0.01 Vibratory Roller 0.210 0.02 Large bulldozer 0.089 0.01 Small bulldozer 0.003 0.00 Jackhammer 0.035 0.00 Loaded trucks 0.076 0.01 Criteria 0.200 Notes: RMS velocity calculated from vibration level (VdB) using the reference of one microinch/second. Source: Based on methodology from the United States Department of Transportation Federal Transit Administration, Transit Noise and Vibration Impact Assessment (2006). I-7

Noise Contours for Existing Conditions Daily Traffic Volumes Noise level at 50 feet (dba CNEL) Distance to noise contour (feet) 70 dba CNEL 65 dba CNEL 60 dba CNEL Roadway Segment Towne Avenue north of Baseline Rd. 494 54.1 4 9 20 Towne Avenue south of Baseline Rd. 13,001 68.3 38 83 178 Mountain Avenue north of Baseline Rd. 3,156 64.2 21 44 95 Mountain Avenue Baseline Rd. to Huron Dr. 6,488 67.3 33 71 154 Mountain Avenue Huron Dr. to Foothill Blvd. 9,962 69.2 44 95 205 Mountain Avenue south of Foothill Blvd. 11,423 69.8 48 104 224 Indian Hill Blvd. north of Baseline Rd. 5,552 66.6 30 64 139 Indian Hill Blvd. south of Baseline Rd. 12,020 70.0 50 108 232 Mills Avenue north of Baseline Rd. 7,540 68.0 37 79 170 Mills Avenue south of Baseline Rd. 9,657 69.0 43 93 201 Monte Vista Av. north of Baseline Rd. 4,829 64.0 20 43 92 Monte Vista Av. south of Baseline Rd. 4,829 64.0 20 43 92 Baseline Rd. west of Towne Av. 11,859 67.9 36 78 168 Baseline Rd. Towne Av. to Mountain Av. 18,155 69.7 48 103 223 Baseline Rd. Mountain Av. To Dwy 2 19,553 70.1 50 109 234 Baseline Rd. Dwy 2 to Indian Hill Blvd. 19,553 70.1 50 109 234 Baseline Rd. Indian Hill Blvd. to Mills Av. 20,400 70.2 52 112 241 Baseline Rd. Mills Av. to Monte Vista Av. 19,795 70.1 51 110 236 Baseline Rd. east of Monte Vista Av. 33,100 72.3 72 154 332 Foothill Blvd. west of Mountain Av. 24,008 70.9 58 125 268 Foothill Blvd. east of Mountain Av. 25,651 71.2 60 130 280 I-8

Noise Contours for 2015 No Project Conditions Daily Traffic Volumes Noise level at 50 feet (dba CNEL) Distance to noise contour (feet) 70 dba CNEL 65 dba CNEL 60 dba CNEL Roadway Segment Towne Avenue north of Baseline Rd. 514 54.3 4 10 21 Towne Avenue south of Baseline Rd. 14,040 68.6 40 87 188 Mountain Avenue north of Baseline Rd. 3,332 64.4 21 46 99 Mountain Avenue Baseline Rd. to Huron Dr. 6,933 67.6 35 75 161 Mountain Avenue Huron Dr. to Foothill Blvd. 10,670 69.5 46 99 214 Mountain Avenue south of Foothill Blvd. 12,032 70.0 50 108 232 Indian Hill Blvd. north of Baseline Rd. 6,094 67.0 32 68 148 Indian Hill Blvd. south of Baseline Rd. 13,037 70.4 53 114 245 Mills Avenue north of Baseline Rd. 7,936 68.2 38 82 176 Mills Avenue south of Baseline Rd. 10,432 69.4 45 98 211 Monte Vista Av. north of Baseline Rd. 5,258 64.4 21 45 98 Monte Vista Av. south of Baseline Rd. 10,148 67.2 33 70 151 Baseline Rd. west of Towne Av. 12,785 68.2 38 82 176 Baseline Rd. Towne Av. to Mountain Av. 19,819 70.1 51 110 236 Baseline Rd. Mountain Av. To Dwy 2 21,307 70.4 53 115 248 Baseline Rd. Dwy 2 to Indian Hill Blvd. 21,472 70.5 54 116 249 Baseline Rd. Indian Hill Blvd. to Mills Av. 22,465 70.7 55 119 257 Baseline Rd. Mills Av. to Monte Vista Av. 22,309 70.6 55 119 256 Baseline Rd. east of Monte Vista Av. 40,526 73.2 82 177 380 Foothill Blvd. west of Mountain Av. 28,513 71.7 65 140 301 Foothill Blvd. east of Mountain Av. 30,228 71.9 67 145 313 I-9

Noise Contours for 2015 With Project Conditions Daily Traffic Volumes Noise level at 50 feet (dba CNEL) Distance to noise contour (feet) 70 dba CNEL 65 dba CNEL 60 dba CNEL Roadway Segment Towne Avenue north of Baseline Rd. 514 54.3 4 10 21 Towne Avenue south of Baseline Rd. 14,217 68.7 41 88 189 Mountain Avenue north of Baseline Rd. 3,332 64.4 21 46 99 Mountain Avenue Baseline Rd. to Huron Dr. 7,397 67.9 36 78 168 Mountain Avenue Huron Dr. to Foothill Blvd. 10,890 69.6 47 101 217 Mountain Avenue south of Foothill Blvd. 12,120 70.0 50 108 233 Indian Hill Blvd. north of Baseline Rd. 6,138 67.1 32 69 148 Indian Hill Blvd. south of Baseline Rd. 13,081 70.4 53 114 246 Mills Avenue north of Baseline Rd. 7,980 68.2 38 82 177 Mills Avenue south of Baseline Rd. 10,476 69.4 46 98 212 Monte Vista Av. north of Baseline Rd. 5,302 64.4 21 46 98 Monte Vista Av. south of Baseline Rd. 10,192 67.2 33 70 152 Baseline Rd. west of Towne Av. 12,873 68.2 38 82 177 Baseline Rd. Towne Av. to Mountain Av. 20,085 70.2 51 111 238 Baseline Rd. Mountain Av. To Dwy 2 21,639 70.5 54 116 250 Baseline Rd. Dwy 2 to Indian Hill Blvd. 21,870 70.5 54 117 252 Baseline Rd. Indian Hill Blvd. to Mills Av. 22,775 70.7 56 120 259 Baseline Rd. Mills Av. to Monte Vista Av. 22,529 70.7 55 119 257 Baseline Rd. east of Monte Vista Av. 40,658 73.2 82 177 381 Foothill Blvd. west of Mountain Av. 28,557 71.7 65 140 301 Foothill Blvd. east of Mountain Av. 30,316 72.0 68 146 314 I-10

Noise Contours for 2030 No Project Conditions Daily Traffic Volumes Noise level at 50 feet (dba CNEL) Distance to noise contour (feet) 70 dba CNEL 65 dba CNEL 60 dba CNEL Roadway Segment Towne Avenue north of Baseline Rd. 584 54.8 5 10 23 Towne Avenue south of Baseline Rd. 20,521 70.3 52 112 242 Mountain Avenue north of Baseline Rd. 4,702 65.9 27 58 124 Mountain Avenue Baseline Rd. to Huron Dr. 9,001 68.7 41 89 191 Mountain Avenue Huron Dr. to Foothill Blvd. 23,236 72.9 78 167 360 Mountain Avenue south of Foothill Blvd. 16,917 71.5 63 135 291 Indian Hill Blvd. north of Baseline Rd. 10,735 69.5 46 100 215 Indian Hill Blvd. south of Baseline Rd. 23,307 72.9 78 167 361 Mills Avenue north of Baseline Rd. 10,033 69.2 44 95 206 Mills Avenue south of Baseline Rd. 11,735 69.9 49 106 228 Monte Vista Av. north of Baseline Rd. 13,001 68.3 38 83 178 Monte Vista Av. south of Baseline Rd. 39,529 73.1 81 174 374 Baseline Rd. west of Towne Av. 24,840 71.1 59 127 275 Baseline Rd. Towne Av. to Mountain Av. 31,321 72.1 69 149 320 Baseline Rd. Mountain Av. To Dwy 2 24,885 71.1 59 128 275 Baseline Rd. Dwy 2 to Indian Hill Blvd. 26,742 71.4 62 134 288 Baseline Rd. Indian Hill Blvd. to Mills Av. 29,489 71.8 66 143 308 Baseline Rd. Mills Av. to Monte Vista Av. 27,379 71.5 63 136 293 Baseline Rd. east of Monte Vista Av. 58,920 74.8 105 227 488 Foothill Blvd. west of Mountain Av. 41,919 73.4 84 181 389 Foothill Blvd. east of Mountain Av. 38,717 73.0 80 171 369 I-11

Noise Contours for 2030 With Project Conditions Daily Traffic Volumes Noise level at 50 feet (dba CNEL) Distance to noise contour (feet) 70 dba CNEL 65 dba CNEL 60 dba CNEL Roadway Segment Towne Avenue north of Baseline Rd. 584 54.8 5 10 23 Towne Avenue south of Baseline Rd. 20,698 70.3 52 113 243 Mountain Avenue north of Baseline Rd. 4,702 65.9 27 58 124 Mountain Avenue Baseline Rd. to Huron Dr. 9,446 69.0 43 92 198 Mountain Avenue Huron Dr. to Foothill Blvd. 23,456 72.9 78 168 362 Mountain Avenue south of Foothill Blvd. 17,005 71.5 63 136 292 Indian Hill Blvd. north of Baseline Rd. 10,779 69.5 46 100 216 Indian Hill Blvd. south of Baseline Rd. 23,351 72.9 78 168 361 Mills Avenue north of Baseline Rd. 10,077 69.2 44 96 206 Mills Avenue south of Baseline Rd. 11,779 69.9 49 106 229 Monte Vista Av. north of Baseline Rd. 13,045 68.3 38 83 179 Monte Vista Av. south of Baseline Rd. 39,573 73.1 81 174 374 Baseline Rd. west of Towne Av. 24,928 71.1 59 128 275 Baseline Rd. Towne Av. to Mountain Av. 31,586 72.1 69 150 322 Baseline Rd. Mountain Av. To Dwy 2 25,217 71.2 60 129 277 Baseline Rd. Dwy 2 to Indian Hill Blvd. 27,140 71.5 63 135 291 Baseline Rd. Indian Hill Blvd. to Mills Av. 29,799 71.9 67 144 310 Baseline Rd. Mills Av. to Monte Vista Av. 27,599 71.6 63 137 294 Baseline Rd. east of Monte Vista Av. 59,052 74.9 105 227 489 Foothill Blvd. west of Mountain Av. 41,963 73.4 84 181 389 Foothill Blvd. east of Mountain Av. 38,805 73.0 80 172 370 I-12

Project-Related Traffic Noise Increases Roadway Segment No Project With Project Project Contribution No Project With Project Project Contribution Towne Avenue north of Baseline Rd. 54.3 54.3 0.0 54.8 54.8 0.0 Towne Avenue south of Baseline Rd. 68.6 68.7 0.1 70.3 70.3 0.0 Mountain Avenue north of Baseline Rd. 64.4 64.4 0.0 65.9 65.9 0.0 Mountain Avenue Baseline Rd. to Huron Dr. 67.6 67.9 0.3 68.7 69.0 0.3 Mountain Avenue Huron Dr. to Foothill Blvd. 69.5 69.6 0.1 72.9 72.9 0.0 Mountain Avenue south of Foothill Blvd. 70.0 70.0 0.0 71.5 71.5 0.0 Indian Hill Blvd. north of Baseline Rd. 67.0 67.1 0.1 69.5 69.5 0.0 Indian Hill Blvd. south of Baseline Rd. 70.4 70.4 0.0 72.9 72.9 0.0 Mills Avenue north of Baseline Rd. 68.2 68.2 0.0 69.2 69.2 0.0 Mills Avenue south of Baseline Rd. 69.4 69.4 0.0 69.9 69.9 0.0 Monte Vista Av. north of Baseline Rd. 64.4 64.4 0.0 68.3 68.3 0.0 Monte Vista Av. south of Baseline Rd. 67.2 67.2 0.0 73.1 73.1 0.0 Baseline Rd. west of Towne Av. 68.2 68.2 0.0 71.1 71.1 0.0 Baseline Rd. Towne Av. to Mountain Av. 70.1 70.2 0.1 72.1 72.1 0.0 Baseline Rd. Mountain Av. To Dwy 2 70.4 70.5 0.1 71.1 71.2 0.1 Baseline Rd. Dwy 2 to Indian Hill Blvd. 70.5 70.5 0.0 71.4 71.5 0.1 Baseline Rd. Indian Hill Blvd. to Mills Av. 70.7 70.7 0.0 71.8 71.9 0.1 Baseline Rd. Mills Av. to Monte Vista Av. 70.6 70.7 0.1 71.5 71.6 0.1 Baseline Rd. east of Monte Vista Av. 73.2 73.2 0.0 74.8 74.9 0.1 Foothill Blvd. west of Mountain Av. 71.7 71.7 0.0 73.4 73.4 0.0 Foothill Blvd. east of Mountain Av. 71.9 72.0 0.1 73.0 73.0 0.0 2015 2030 I-13

Cumulative Off-Site Contributions CNEL at 50 feet (dba) Overall Increase 1 Project Contribution 2 Roadway Segment Existing 2030 WP Towne Avenue north of Baseline Rd. 54.1 54.8 0.7 0.0 Towne Avenue south of Baseline Rd. 68.3 70.3 2.0 0.0 Mountain Avenue north of Baseline Rd. 64.2 65.9 1.7 0.0 Mountain Avenue Baseline Rd. to Huron Dr. 67.3 69.0 1.7 0.0 Mountain Avenue Huron Dr. to Foothill Blvd. 69.2 72.9 3.7 0.0 Mountain Avenue south of Foothill Blvd. 69.8 71.5 1.7 0.0 Indian Hill Blvd. north of Baseline Rd. 66.6 69.5 2.9 0.1 Indian Hill Blvd. south of Baseline Rd. 70.0 72.9 2.9 0.1 Mills Avenue north of Baseline Rd. 68.0 69.2 1.2 0.3 Mills Avenue south of Baseline Rd. 69.0 69.9 0.9 0.0 Monte Vista Av. north of Baseline Rd. 64.0 68.3 4.3 0.0 Monte Vista Av. south of Baseline Rd. 64.0 73.1 9.1 0.0 Baseline Rd. west of Towne Av. 67.9 71.1 3.2 0.0 Baseline Rd. Towne Av. to Mountain Av. 69.7 72.1 2.4 0.0 Baseline Rd. Mountain Av. To Dwy 2 70.1 71.2 1.1 0.0 Baseline Rd. Dwy 2 to Indian Hill Blvd. 70.1 71.5 1.4 0.0 Baseline Rd. Indian Hill Blvd. to Mills Av. 70.2 71.9 1.7 0.0 Baseline Rd. Mills Av. to Monte Vista Av. 70.1 71.6 1.5 0.1 Baseline Rd. east of Monte Vista Av. 72.3 74.9 2.6 0.0 Foothill Blvd. west of Mountain Av. 70.9 73.4 2.5 0.1 Foothill Blvd. east of Mountain Av. 71.2 73.0 1.8 0.2 I-14

FHWA RD-77-108 NOISE PREDICTION MODEL SERRANO PHASE II RESIDENTIAL PROJECT EXISTING POSTED SPEED LIMIT LANE # ROADWAY SEGMENT ADT DISTANCE 1 Towne Avenue north of Baseline Rd. 494 35 50 Soft 2 Towne Avenue south of Baseline Rd. 13,001 35 50 Soft 3 Mountain Avenue north of Baseline Rd. 3,156 45 36 Soft 4 Mountain Avenue Baseline Rd. to Huron Dr. 6,488 45 36 Soft 5 Mountain Avenue Huron Dr. to Foothill Blvd. 9,962 45 36 Soft 6 Mountain Avenue south of Foothill Blvd. 11,423 45 36 Soft 7 Indian Hill Blvd. north of Baseline Rd. 5,552 45 36 Soft 8 Indian Hill Blvd. south of Baseline Rd. 12,020 45 36 Soft 9 Mills Avenue north of Baseline Rd. 7,540 45 36 Soft 10 Mills Avenue south of Baseline Rd. 9,657 45 36 Soft 11 Monte Vista Av. north of Baseline Rd. 4,829 35 50 Soft 12 Monte Vista Av. south of Baseline Rd. 4,829 35 50 Soft 13 Baseline Rd. west of Towne Av. 11,859 35 50 Soft 14 Baseline Rd. Towne Av. to Mountain Av. 18,155 35 50 Soft 15 Baseline Rd. Mountain Av. To Dwy 2 19,553 35 50 Soft 16 Baseline Rd. Dwy 2 to Indian Hill Blvd. 19,553 35 50 Soft 17 Baseline Rd. Indian Hill Blvd. to Mills Av. 20,400 35 50 Soft 18 Baseline Rd. Mills Av. to Monte Vista Av. 19,795 35 50 Soft 19 Baseline Rd. east of Monte Vista Av. 33,100 35 50 Soft 20 Foothill Blvd. west of Mountain Av. 24,008 35 50 Soft 21 Foothill Blvd. east of Mountain Av. 25,651 35 50 Soft SITE CONDITION I-15

FHWA RD-77-108 NOISE PREDICTION MODEL SERRANO PHASE II RESIDENTIAL PROJECT EXISTING CONDITIONS NOISE CONTOURS RESULT SUMMARY TABLE DAILY TRAFIC NOISE LEVEL AT 50 FT. DISTACE TO NOISE CONTOUR (FT. dba CNEL dba CNEL dba CNEL # ROADWAY SEGMENT VOLUMES (dba CNEL) 1 Towne Avenue north of Baseline Rd. 494 54.1 4 9 20 2 Towne Avenue south of Baseline Rd. 13,001 68.3 38 83 178 3 Mountain Avenue north of Baseline Rd. 3,156 64.2 21 44 95 4 Mountain Avenue Baseline Rd. to Huron Dr. 6,488 67.3 33 71 154 5 Mountain Avenue Huron Dr. to Foothill Blvd. 9,962 69.2 44 95 205 6 Mountain Avenue south of Foothill Blvd. 11,423 69.8 48 104 224 7 Indian Hill Blvd. north of Baseline Rd. 5,552 66.6 30 64 139 8 Indian Hill Blvd. south of Baseline Rd. 12,020 70.0 50 108 232 9 Mills Avenue north of Baseline Rd. 7,540 68.0 37 79 170 10 Mills Avenue south of Baseline Rd. 9,657 69.0 43 93 201 11 Monte Vista Av. north of Baseline Rd. 4,829 64.0 20 43 92 12 Monte Vista Av. south of Baseline Rd. 4,829 64.0 20 43 92 13 Baseline Rd. west of Towne Av. 11,859 67.9 36 78 168 14 Baseline Rd. Towne Av. to Mountain Av. 18,155 69.7 48 103 223 15 Baseline Rd. Mountain Av. To Dwy 2 19,553 70.1 50 109 234 16 Baseline Rd. Dwy 2 to Indian Hill Blvd. 19,553 70.1 50 109 234 17 Baseline Rd. Indian Hill Blvd. to Mills Av. 20,400 70.2 52 112 241 18 Baseline Rd. Mills Av. to Monte Vista Av. 19,795 70.1 51 110 236 19 Baseline Rd. east of Monte Vista Av. 33,100 72.3 72 154 332 20 Foothill Blvd. west of Mountain Av. 24,008 70.9 58 125 268 21 Foothill Blvd. east of Mountain Av. 25,651 71.2 60 130 280 I-16

FHWA RD-77-108 NOISE PREDICTION MODEL SERRANO PHASE II Scenario: EXISTING Project: RESIDENTIAL PROJECT Roadway: Towne Avenue Analyst JV Segment: north of Baseline Rd. Date: 17-Jan-14 ADT 494 SPEED (mph) 35 ROAD NEAR-FAR LN. DIST. 50 DAILY HOURLY Vehicles per hour 30.99633 0 0 13 0 0 8 0 0 Speed in MPH 35 35 35 35 35 35 35 35 35 Reference levels (dba) 65.1 74.8 80.0 65.1 74.8 80.0 65.1 74.8 80.0 Flow -15.8-34.2-34.6-19.7-38.0-38.4-21.8-40.2-40.6 Distance 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 LEQ 50.1 41.5 46.3 46.3 37.6 42.5 44.1 35.5 40.3 VEHICULAR NOISE DAY= 52.0 Leq EVENING= 48.2 Leq NIGHT= 46.0 Leq NOISE LEVELS AT 50 FEET FROM CENTERLINE (dba): Ldn= 53.8 CNEL= 54.1 NOISE CONTOUR: 70 dba 65 dba 60 dba ROAD CENTERLINE DISTANCE TO NOISE CONTOUR (FEET): Ldn: 4 9 19 CNEL: 4 9 20 I-17

FHWA RD-77-108 NOISE PREDICTION MODEL SERRANO PHASE II Scenario: EXISTING Project: RESIDENTIAL PROJECT Roadway: Towne Avenue Analyst JV Segment: south of Baseline Rd. Date: 17-Jan-14 ADT 13,001 SPEED (mph) 35 ROAD NEAR-FAR LN. DIST. 50 DAILY HOURLY Vehicles per hour 816 12 11 337 5 5 205 3 3 Speed in MPH 35 35 35 35 35 35 35 35 35 Reference levels (dba) 65.1 74.8 80.0 65.1 74.8 80.0 65.1 74.8 80.0 Flow -1.6-20.0-20.4-5.5-23.8-24.2-7.6-26.0-26.4 Distance 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 LEQ 64.3 55.7 60.5 60.5 51.8 56.7 58.3 49.7 54.5 VEHICULAR NOISE DAY= 66.2 Leq EVENING= 62.4 Leq NIGHT= 60.2 Leq NOISE LEVELS AT 50 FEET FROM CENTERLINE (dba): Ldn= 68.0 CNEL= 68.3 NOISE CONTOUR: 70 dba 65 dba 60 dba ROAD CENTERLINE DISTANCE TO NOISE CONTOUR (FEET): Ldn: 37 79 170 CNEL: 38 83 178 I-18

FHWA RD-77-108 NOISE PREDICTION MODEL SERRANO PHASE II Scenario: EXISTING Project: RESIDENTIAL PROJECT Roadway: Mountain Avenue Analyst JV Segment: north of Baseline Rd. Date: 17-Jan-14 ADT 3,156 SPEED (mph) 45 ROAD NEAR-FAR LN. DIST. 36 DAILY HOURLY Vehicles per hour 198 3 3 82 1 1 50 1 1 Speed in MPH 45 45 45 45 45 45 45 45 45 Reference levels (dba) 69.3 77.6 82.1 69.3 77.6 82.1 69.3 77.6 82.1 Flow -8.9-27.2-27.6-12.7-31.1-31.4-14.9-33.2-33.6 Distance 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 LEQ 60.8 50.7 54.9 57.0 46.9 51.0 54.8 44.7 48.9 VEHICULAR NOISE DAY= 62.1 Leq EVENING= 58.3 Leq NIGHT= 56.1 Leq NOISE LEVELS AT 50 FEET FROM CENTERLINE (dba): Ldn= 63.9 CNEL= 64.2 NOISE CONTOUR: 70 dba 65 dba 60 dba ROAD CENTERLINE DISTANCE TO NOISE CONTOUR (FEET): Ldn: 20 42 91 CNEL: 21 44 95 I-19

FHWA RD-77-108 NOISE PREDICTION MODEL SERRANO PHASE II Scenario: EXISTING Project: RESIDENTIAL PROJECT Roadway: Mountain Avenue Analyst JV Segment: Baseline Rd. to Huron Dr. Date: 17-Jan-14 ADT 6,488 SPEED (mph) 45 ROAD NEAR-FAR LN. DIST. 36 DAILY HOURLY Vehicles per hour 407 6 5 168 2 2 102 1 1 Speed in MPH 45 45 45 45 45 45 45 45 45 Reference levels (dba) 69.3 77.6 82.1 69.3 77.6 82.1 69.3 77.6 82.1 Flow -5.7-24.1-24.5-9.6-27.9-28.3-11.7-30.1-30.5 Distance 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 LEQ 64.0 53.9 58.0 60.1 50.0 54.2 58.0 47.9 52.0 VEHICULAR NOISE DAY= 65.3 Leq EVENING= 61.4 Leq NIGHT= 59.3 Leq NOISE LEVELS AT 50 FEET FROM CENTERLINE (dba): Ldn= 67.0 CNEL= 67.3 NOISE CONTOUR: 70 dba 65 dba 60 dba ROAD CENTERLINE DISTANCE TO NOISE CONTOUR (FEET): Ldn: 32 68 147 CNEL: 33 71 154 I-20

FHWA RD-77-108 NOISE PREDICTION MODEL SERRANO PHASE II Scenario: EXISTING Project: RESIDENTIAL PROJECT Roadway: Mountain Avenue Analyst JV Segment: Huron Dr. to Foothill Blvd. Date: 17-Jan-14 ADT 9,962 SPEED (mph) 45 ROAD NEAR-FAR LN. DIST. 36 DAILY HOURLY Vehicles per hour 625 9 8 258 4 3 157 2 2 Speed in MPH 45 45 45 45 45 45 45 45 45 Reference levels (dba) 69.3 77.6 82.1 69.3 77.6 82.1 69.3 77.6 82.1 Flow -3.9-22.2-22.6-7.7-26.1-26.5-9.9-28.2-28.6 Distance 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 LEQ 65.8 55.7 59.9 62.0 51.9 56.0 59.8 49.7 53.9 VEHICULAR NOISE DAY= 67.1 Leq EVENING= 63.3 Leq NIGHT= 61.1 Leq NOISE LEVELS AT 50 FEET FROM CENTERLINE (dba): Ldn= 68.9 CNEL= 69.2 NOISE CONTOUR: 70 dba 65 dba 60 dba ROAD CENTERLINE DISTANCE TO NOISE CONTOUR (FEET): Ldn: 42 91 195 CNEL: 44 95 205 I-21

FHWA RD-77-108 NOISE PREDICTION MODEL SERRANO PHASE II Scenario: EXISTING Project: RESIDENTIAL PROJECT Roadway: Mountain Avenue Analyst JV Segment: south of Foothill Blvd. Date: 17-Jan-14 ADT 11,423 SPEED (mph) 45 ROAD NEAR-FAR LN. DIST. 36 DAILY HOURLY Vehicles per hour 717 10 10 296 4 4 180 3 2 Speed in MPH 45 45 45 45 45 45 45 45 45 Reference levels (dba) 69.3 77.6 82.1 69.3 77.6 82.1 69.3 77.6 82.1 Flow -3.3-21.6-22.0-7.1-25.5-25.9-9.3-27.6-28.0 Distance 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 LEQ 66.4 56.3 60.5 62.6 52.5 56.6 60.4 50.3 54.5 VEHICULAR NOISE DAY= 67.7 Leq EVENING= 63.9 Leq NIGHT= 61.7 Leq NOISE LEVELS AT 50 FEET FROM CENTERLINE (dba): Ldn= 69.5 CNEL= 69.8 NOISE CONTOUR: 70 dba 65 dba 60 dba ROAD CENTERLINE DISTANCE TO NOISE CONTOUR (FEET): Ldn: 46 99 214 CNEL: 48 104 224 I-22

FHWA RD-77-108 NOISE PREDICTION MODEL SERRANO PHASE II Scenario: EXISTING Project: RESIDENTIAL PROJECT Roadway: Indian Hill Blvd. Analyst JV Segment: north of Baseline Rd. Date: 17-Jan-14 ADT 5,552 SPEED (mph) 45 ROAD NEAR-FAR LN. DIST. 36 DAILY HOURLY Vehicles per hour 348 5 5 144 2 2 88 1 1 Speed in MPH 45 45 45 45 45 45 45 45 45 Reference levels (dba) 69.3 77.6 82.1 69.3 77.6 82.1 69.3 77.6 82.1 Flow -6.4-24.8-25.2-10.3-28.6-29.0-12.4-30.8-31.2 Distance 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 LEQ 63.3 53.2 57.3 59.4 49.4 53.5 57.3 47.2 51.3 VEHICULAR NOISE DAY= 64.6 Leq EVENING= 60.7 Leq NIGHT= 58.6 Leq NOISE LEVELS AT 50 FEET FROM CENTERLINE (dba): Ldn= 66.3 CNEL= 66.6 NOISE CONTOUR: 70 dba 65 dba 60 dba ROAD CENTERLINE DISTANCE TO NOISE CONTOUR (FEET): Ldn: 28 61 132 CNEL: 30 64 139 I-23

FHWA RD-77-108 NOISE PREDICTION MODEL SERRANO PHASE II Scenario: EXISTING Project: RESIDENTIAL PROJECT Roadway: Indian Hill Blvd. Analyst JV Segment: south of Baseline Rd. Date: 17-Jan-14 ADT 12,020 SPEED (mph) 45 ROAD NEAR-FAR LN. DIST. 36 DAILY HOURLY Vehicles per hour 754 11 10 312 5 4 190 3 3 Speed in MPH 45 45 45 45 45 45 45 45 45 Reference levels (dba) 69.3 77.6 82.1 69.3 77.6 82.1 69.3 77.6 82.1 Flow -3.1-21.4-21.8-6.9-25.3-25.6-9.1-27.4-27.8 Distance 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 LEQ 66.6 56.5 60.7 62.8 52.7 56.8 60.6 50.6 54.7 VEHICULAR NOISE DAY= 67.9 Leq EVENING= 64.1 Leq NIGHT= 61.9 Leq NOISE LEVELS AT 50 FEET FROM CENTERLINE (dba): Ldn= 69.7 CNEL= 70.0 NOISE CONTOUR: 70 dba 65 dba 60 dba ROAD CENTERLINE DISTANCE TO NOISE CONTOUR (FEET): Ldn: 48 103 221 CNEL: 50 108 232 I-24

FHWA RD-77-108 NOISE PREDICTION MODEL SERRANO PHASE II Scenario: EXISTING Project: RESIDENTIAL PROJECT Roadway: Mills Avenue Analyst JV Segment: north of Baseline Rd. Date: 17-Jan-14 ADT 7,540 SPEED (mph) 45 ROAD NEAR-FAR LN. DIST. 36 DAILY HOURLY Vehicles per hour 473 7 6 196 3 3 119 2 2 Speed in MPH 45 45 45 45 45 45 45 45 45 Reference levels (dba) 69.3 77.6 82.1 69.3 77.6 82.1 69.3 77.6 82.1 Flow -5.1-23.4-23.8-8.9-27.3-27.7-11.1-29.4-29.8 Distance 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 LEQ 64.6 54.5 58.7 60.8 50.7 54.8 58.6 48.5 52.7 VEHICULAR NOISE DAY= 65.9 Leq EVENING= 62.1 Leq NIGHT= 59.9 Leq NOISE LEVELS AT 50 FEET FROM CENTERLINE (dba): Ldn= 67.7 CNEL= 68.0 NOISE CONTOUR: 70 dba 65 dba 60 dba ROAD CENTERLINE DISTANCE TO NOISE CONTOUR (FEET): Ldn: 35 75 162 CNEL: 37 79 170 I-25

FHWA RD-77-108 NOISE PREDICTION MODEL SERRANO PHASE II Scenario: EXISTING Project: RESIDENTIAL PROJECT Roadway: Mills Avenue Analyst JV Segment: south of Baseline Rd. Date: 17-Jan-14 ADT 9,657 SPEED (mph) 45 ROAD NEAR-FAR LN. DIST. 36 DAILY HOURLY Vehicles per hour 606 9 8 251 4 3 152 2 2 Speed in MPH 45 45 45 45 45 45 45 45 45 Reference levels (dba) 69.3 77.6 82.1 69.3 77.6 82.1 69.3 77.6 82.1 Flow -4.0-22.4-22.8-7.8-26.2-26.6-10.0-28.4-28.7 Distance 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 LEQ 65.7 55.6 59.7 61.8 51.8 55.9 59.7 49.6 53.7 VEHICULAR NOISE DAY= 67.0 Leq EVENING= 63.2 Leq NIGHT= 61.0 Leq NOISE LEVELS AT 50 FEET FROM CENTERLINE (dba): Ldn= 68.7 CNEL= 69.0 NOISE CONTOUR: 70 dba 65 dba 60 dba ROAD CENTERLINE DISTANCE TO NOISE CONTOUR (FEET): Ldn: 41 89 191 CNEL: 43 93 201 I-26

FHWA RD-77-108 NOISE PREDICTION MODEL SERRANO PHASE II Scenario: EXISTING Project: RESIDENTIAL PROJECT Roadway: Monte Vista Av. Analyst JV Segment: north of Baseline Rd. Date: 17-Jan-14 ADT 4,829 SPEED (mph) 35 ROAD NEAR-FAR LN. DIST. 50 DAILY HOURLY Vehicles per hour 303 4 4 125 2 2 76 1 1 Speed in MPH 35 35 35 35 35 35 35 35 35 Reference levels (dba) 65.1 74.8 80.0 65.1 74.8 80.0 65.1 74.8 80.0 Flow -5.9-24.3-24.7-9.8-28.1-28.5-11.9-30.3-30.7 Distance 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 LEQ 60.0 51.4 56.2 56.2 47.5 52.4 54.0 45.4 50.2 VEHICULAR NOISE DAY= 61.9 Leq EVENING= 58.1 Leq NIGHT= 55.9 Leq NOISE LEVELS AT 50 FEET FROM CENTERLINE (dba): Ldn= 63.7 CNEL= 64.0 NOISE CONTOUR: 70 dba 65 dba 60 dba ROAD CENTERLINE DISTANCE TO NOISE CONTOUR (FEET): Ldn: 19 41 88 CNEL: 20 43 92 I-27

FHWA RD-77-108 NOISE PREDICTION MODEL SERRANO PHASE II Scenario: EXISTING Project: RESIDENTIAL PROJECT Roadway: Monte Vista Av. Analyst JV Segment: south of Baseline Rd. Date: 17-Jan-14 ADT 4,829 SPEED (mph) 35 ROAD NEAR-FAR LN. DIST. 50 DAILY HOURLY Vehicles per hour 303 4 4 125 2 2 76 1 1 Speed in MPH 35 35 35 35 35 35 35 35 35 Reference levels (dba) 65.1 74.8 80.0 65.1 74.8 80.0 65.1 74.8 80.0 Flow -5.9-24.3-24.7-9.8-28.1-28.5-11.9-30.3-30.7 Distance 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 LEQ 60.0 51.4 56.2 56.2 47.5 52.4 54.0 45.4 50.2 VEHICULAR NOISE DAY= 61.9 Leq EVENING= 58.1 Leq NIGHT= 55.9 Leq NOISE LEVELS AT 50 FEET FROM CENTERLINE (dba): Ldn= 63.7 CNEL= 64.0 NOISE CONTOUR: 70 dba 65 dba 60 dba ROAD CENTERLINE DISTANCE TO NOISE CONTOUR (FEET): Ldn: 19 41 88 CNEL: 20 43 92 I-28

FHWA RD-77-108 NOISE PREDICTION MODEL SERRANO PHASE II Scenario: EXISTING Project: RESIDENTIAL PROJECT Roadway: Baseline Rd. Analyst JV Segment: west of Towne Av. Date: 17-Jan-14 ADT 11,859 SPEED (mph) 35 ROAD NEAR-FAR LN. DIST. 50 DAILY HOURLY Vehicles per hour 744 11 10 308 4 4 187 3 3 Speed in MPH 35 35 35 35 35 35 35 35 35 Reference levels (dba) 65.1 74.8 80.0 65.1 74.8 80.0 65.1 74.8 80.0 Flow -2.0-20.4-20.8-5.9-24.2-24.6-8.0-26.4-26.8 Distance 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 LEQ 63.9 55.3 60.1 60.1 51.4 56.3 57.9 49.3 54.1 VEHICULAR NOISE DAY= 65.8 Leq EVENING= 62.0 Leq NIGHT= 59.8 Leq NOISE LEVELS AT 50 FEET FROM CENTERLINE (dba): Ldn= 67.6 CNEL= 67.9 NOISE CONTOUR: 70 dba 65 dba 60 dba ROAD CENTERLINE DISTANCE TO NOISE CONTOUR (FEET): Ldn: 34 74 160 CNEL: 36 78 168 I-29

FHWA RD-77-108 NOISE PREDICTION MODEL SERRANO PHASE II Scenario: EXISTING Project: RESIDENTIAL PROJECT Roadway: Baseline Rd. Analyst JV Segment: Towne Av. to Mountain Av. Date: 17-Jan-14 ADT 18,155 SPEED (mph) 35 ROAD NEAR-FAR LN. DIST. 50 DAILY HOURLY Vehicles per hour 1139 17 15 471 7 6 287 4 4 Speed in MPH 35 35 35 35 35 35 35 35 35 Reference levels (dba) 65.1 74.8 80.0 65.1 74.8 80.0 65.1 74.8 80.0 Flow -0.2-18.5-18.9-4.0-22.4-22.8-6.2-24.5-24.9 Distance 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 LEQ 65.8 57.1 62.0 61.9 53.3 58.1 59.8 51.1 56.0 VEHICULAR NOISE DAY= 67.7 Leq EVENING= 63.8 Leq NIGHT= 61.7 Leq NOISE LEVELS AT 50 FEET FROM CENTERLINE (dba): Ldn= 69.4 CNEL= 69.7 NOISE CONTOUR: 70 dba 65 dba 60 dba ROAD CENTERLINE DISTANCE TO NOISE CONTOUR (FEET): Ldn: 46 99 212 CNEL: 48 103 223 I-30

FHWA RD-77-108 NOISE PREDICTION MODEL SERRANO PHASE II Scenario: EXISTING Project: RESIDENTIAL PROJECT Roadway: Baseline Rd. Analyst JV Segment: Mountain Av. To Dwy 2 Date: 17-Jan-14 ADT 19,553 SPEED (mph) 35 ROAD NEAR-FAR LN. DIST. 50 DAILY HOURLY Vehicles per hour 1227 18 16 507 7 7 309 5 4 Speed in MPH 35 35 35 35 35 35 35 35 35 Reference levels (dba) 65.1 74.8 80.0 65.1 74.8 80.0 65.1 74.8 80.0 Flow 0.1-18.2-18.6-3.7-22.1-22.4-5.9-24.2-24.6 Distance 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 LEQ 66.1 57.4 62.3 62.2 53.6 58.4 60.1 51.4 56.3 VEHICULAR NOISE DAY= 68.0 Leq EVENING= 64.2 Leq NIGHT= 62.0 Leq NOISE LEVELS AT 50 FEET FROM CENTERLINE (dba): Ldn= 69.7 CNEL= 70.1 NOISE CONTOUR: 70 dba 65 dba 60 dba ROAD CENTERLINE DISTANCE TO NOISE CONTOUR (FEET): Ldn: 48 104 223 CNEL: 50 109 234 I-31

FHWA RD-77-108 NOISE PREDICTION MODEL SERRANO PHASE II Scenario: EXISTING Project: RESIDENTIAL PROJECT Roadway: Baseline Rd. Analyst JV Segment: Dwy 2 to Indian Hill Blvd. Date: 17-Jan-14 ADT 19,553 SPEED (mph) 35 ROAD NEAR-FAR LN. DIST. 50 DAILY HOURLY Vehicles per hour 1227 18 16 507 7 7 309 5 4 Speed in MPH 35 35 35 35 35 35 35 35 35 Reference levels (dba) 65.1 74.8 80.0 65.1 74.8 80.0 65.1 74.8 80.0 Flow 0.1-18.2-18.6-3.7-22.1-22.4-5.9-24.2-24.6 Distance 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 LEQ 66.1 57.4 62.3 62.2 53.6 58.4 60.1 51.4 56.3 VEHICULAR NOISE DAY= 68.0 Leq EVENING= 64.2 Leq NIGHT= 62.0 Leq NOISE LEVELS AT 50 FEET FROM CENTERLINE (dba): Ldn= 69.7 CNEL= 70.1 NOISE CONTOUR: 70 dba 65 dba 60 dba ROAD CENTERLINE DISTANCE TO NOISE CONTOUR (FEET): Ldn: 48 104 223 CNEL: 50 109 234 I-32

FHWA RD-77-108 NOISE PREDICTION MODEL SERRANO PHASE II Scenario: EXISTING Project: RESIDENTIAL PROJECT Roadway: Baseline Rd. Analyst JV Segment: Indian Hill Blvd. to Mills Av. Date: 17-Jan-14 ADT 20,400 SPEED (mph) 35 ROAD NEAR-FAR LN. DIST. 50 DAILY HOURLY Vehicles per hour 1280 19 17 529 8 7 322 5 4 Speed in MPH 35 35 35 35 35 35 35 35 35 Reference levels (dba) 65.1 74.8 80.0 65.1 74.8 80.0 65.1 74.8 80.0 Flow 0.3-18.0-18.4-3.5-21.9-22.3-5.7-24.0-24.4 Distance 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 LEQ 66.3 57.6 62.5 62.4 53.8 58.6 60.3 51.6 56.5 VEHICULAR NOISE DAY= 68.2 Leq EVENING= 64.3 Leq NIGHT= 62.2 Leq NOISE LEVELS AT 50 FEET FROM CENTERLINE (dba): Ldn= 69.9 CNEL= 70.2 NOISE CONTOUR: 70 dba 65 dba 60 dba ROAD CENTERLINE DISTANCE TO NOISE CONTOUR (FEET): Ldn: 49 107 229 CNEL: 52 112 241 I-33

FHWA RD-77-108 NOISE PREDICTION MODEL SERRANO PHASE II Scenario: EXISTING Project: RESIDENTIAL PROJECT Roadway: Baseline Rd. Analyst JV Segment: Mills Av. to Monte Vista Av. Date: 17-Jan-14 ADT 19,795 SPEED (mph) 35 ROAD NEAR-FAR LN. DIST. 50 DAILY HOURLY Vehicles per hour 1242 18 17 514 7 7 312 5 4 Speed in MPH 35 35 35 35 35 35 35 35 35 Reference levels (dba) 65.1 74.8 80.0 65.1 74.8 80.0 65.1 74.8 80.0 Flow 0.2-18.2-18.5-3.6-22.0-22.4-5.8-24.2-24.5 Distance 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 LEQ 66.1 57.5 62.3 62.3 53.7 58.5 60.1 51.5 56.3 VEHICULAR NOISE DAY= 68.0 Leq EVENING= 64.2 Leq NIGHT= 62.1 Leq NOISE LEVELS AT 50 FEET FROM CENTERLINE (dba): Ldn= 69.8 CNEL= 70.1 NOISE CONTOUR: 70 dba 65 dba 60 dba ROAD CENTERLINE DISTANCE TO NOISE CONTOUR (FEET): Ldn: 48 104 225 CNEL: 51 110 236 I-34

FHWA RD-77-108 NOISE PREDICTION MODEL SERRANO PHASE II Scenario: EXISTING Project: RESIDENTIAL PROJECT Roadway: Baseline Rd. Analyst JV Segment: east of Monte Vista Av. Date: 17-Jan-14 ADT 33,100 SPEED (mph) 35 ROAD NEAR-FAR LN. DIST. 50 DAILY HOURLY Vehicles per hour 2077 30 28 859 13 11 522 8 7 Speed in MPH 35 35 35 35 35 35 35 35 35 Reference levels (dba) 65.1 74.8 80.0 65.1 74.8 80.0 65.1 74.8 80.0 Flow 2.4-15.9-16.3-1.4-19.8-20.1-3.6-21.9-22.3 Distance 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 LEQ 68.4 59.7 64.6 64.5 55.9 60.7 62.4 53.7 58.6 VEHICULAR NOISE DAY= 70.3 Leq EVENING= 66.4 Leq NIGHT= 64.3 Leq NOISE LEVELS AT 50 FEET FROM CENTERLINE (dba): Ldn= 72.0 CNEL= 72.3 NOISE CONTOUR: 70 dba 65 dba 60 dba ROAD CENTERLINE DISTANCE TO NOISE CONTOUR (FEET): Ldn: 68 147 317 CNEL: 72 154 332 I-35

FHWA RD-77-108 NOISE PREDICTION MODEL SERRANO PHASE II Scenario: EXISTING Project: RESIDENTIAL PROJECT Roadway: Foothill Blvd. Analyst JV Segment: west of Mountain Av. Date: 17-Jan-14 ADT 24,008 SPEED (mph) 35 ROAD NEAR-FAR LN. DIST. 50 DAILY HOURLY Vehicles per hour 1506 22 20 623 9 8 379 6 5 Speed in MPH 35 35 35 35 35 35 35 35 35 Reference levels (dba) 65.1 74.8 80.0 65.1 74.8 80.0 65.1 74.8 80.0 Flow 1.0-17.3-17.7-2.8-21.2-21.5-5.0-23.3-23.7 Distance 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 LEQ 67.0 58.3 63.2 63.1 54.5 59.3 61.0 52.3 57.2 VEHICULAR NOISE DAY= 68.9 Leq EVENING= 65.1 Leq NIGHT= 62.9 Leq NOISE LEVELS AT 50 FEET FROM CENTERLINE (dba): Ldn= 70.6 CNEL= 70.9 NOISE CONTOUR: 70 dba 65 dba 60 dba ROAD CENTERLINE DISTANCE TO NOISE CONTOUR (FEET): Ldn: 55 119 256 CNEL: 58 125 268 I-36

FHWA RD-77-108 NOISE PREDICTION MODEL SERRANO PHASE II Scenario: EXISTING Project: RESIDENTIAL PROJECT Roadway: Foothill Blvd. Analyst JV Segment: east of Mountain Av. Date: 17-Jan-14 ADT 25,651 SPEED (mph) 35 ROAD NEAR-FAR LN. DIST. 50 DAILY HOURLY Vehicles per hour 1609 23 22 665 10 9 405 6 5 Speed in MPH 35 35 35 35 35 35 35 35 35 Reference levels (dba) 65.1 74.8 80.0 65.1 74.8 80.0 65.1 74.8 80.0 Flow 1.3-17.0-17.4-2.5-20.9-21.3-4.7-23.0-23.4 Distance 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 LEQ 67.3 58.6 63.5 63.4 54.8 59.6 61.3 52.6 57.5 VEHICULAR NOISE DAY= 69.2 Leq EVENING= 65.3 Leq NIGHT= 63.2 Leq NOISE LEVELS AT 50 FEET FROM CENTERLINE (dba): Ldn= 70.9 CNEL= 71.2 NOISE CONTOUR: 70 dba 65 dba 60 dba ROAD CENTERLINE DISTANCE TO NOISE CONTOUR (FEET): Ldn: 58 124 267 CNEL: 60 130 280 I-37

SERRANO PHASE II RESIDENTIAL PROJECT 2015 NP POSTED SPEED LIMIT LANE # ROADWAY SEGMENT ADT DISTANCE 1 Towne Avenue north of Baseline Rd. 514 35 50 Soft 2 Towne Avenue south of Baseline Rd. 14,040 35 50 Soft 3 Mountain Avenue north of Baseline Rd. 3,332 45 36 Soft 4 Mountain Avenue Baseline Rd. to Huron Dr. 6,933 45 36 Soft 5 Mountain Avenue Huron Dr. to Foothill Blvd. 10,670 45 36 Soft 6 Mountain Avenue south of Foothill Blvd. 12,032 45 36 Soft 7 Indian Hill Blvd. north of Baseline Rd. 6,094 45 36 Soft 8 Indian Hill Blvd. south of Baseline Rd. 13,037 45 36 Soft 9 Mills Avenue north of Baseline Rd. 7,936 45 36 Soft 10 Mills Avenue south of Baseline Rd. 10,432 45 36 Soft 11 Monte Vista Av. north of Baseline Rd. 5,258 35 50 Soft 12 Monte Vista Av. south of Baseline Rd. 10,148 35 50 Soft 13 Baseline Rd. west of Towne Av. 12,785 35 50 Soft 14 Baseline Rd. Towne Av. to Mountain Av. 19,819 35 50 Soft 15 Baseline Rd. Mountain Av. To Dwy 2 21,307 35 50 Soft 16 Baseline Rd. Dwy 2 to Indian Hill Blvd. 21,472 35 50 Soft 17 Baseline Rd. Indian Hill Blvd. to Mills Av. 22,465 35 50 Soft 18 Baseline Rd. Mills Av. to Monte Vista Av. 22,309 35 50 Soft 19 Baseline Rd. east of Monte Vista Av. 40,526 35 50 Soft 20 Foothill Blvd. west of Mountain Av. 28,513 35 50 Soft 21 Foothill Blvd. east of Mountain Av. 30,228 35 50 Soft SITE CONDITION I-38

SERRANO PHASE II RESIDENTIAL PROJECT 2015 NP CONDITIONS NOISE CONTOURS RESULT SUMMARY TABLE DAILY TRAFIC VOLUMES NOISE LEVEL AT 50 FT. (dba CNEL) DISTACE TO NOISE CONTOUR (FT.) 70 dba CNEL 65 dba CNEL 60 dba CNEL # ROADWAY SEGMENT 1 Towne Avenue north of Baseline Rd. 514 54.3 4 10 21 2 Towne Avenue south of Baseline Rd. 14,040 68.6 40 87 188 3 Mountain Avenue north of Baseline Rd. 3,332 64.4 21 46 99 4 Mountain Avenue Baseline Rd. to Huron Dr. 6,933 67.6 35 75 161 5 Mountain Avenue Huron Dr. to Foothill Blvd. 10,670 69.5 46 99 214 6 Mountain Avenue south of Foothill Blvd. 12,032 70.0 50 108 232 7 Indian Hill Blvd. north of Baseline Rd. 6,094 67.0 32 68 148 8 Indian Hill Blvd. south of Baseline Rd. 13,037 70.4 53 114 245 9 Mills Avenue north of Baseline Rd. 7,936 68.2 38 82 176 10 Mills Avenue south of Baseline Rd. 10,432 69.4 45 98 211 11 Monte Vista Av. north of Baseline Rd. 5,258 64.4 21 45 98 12 Monte Vista Av. south of Baseline Rd. 10,148 67.2 33 70 151 13 Baseline Rd. west of Towne Av. 12,785 68.2 38 82 176 14 Baseline Rd. Towne Av. to Mountain Av. 19,819 70.1 51 110 236 15 Baseline Rd. Mountain Av. To Dwy 2 21,307 70.4 53 115 248 16 Baseline Rd. Dwy 2 to Indian Hill Blvd. 21,472 70.5 54 116 249 17 Baseline Rd. Indian Hill Blvd. to Mills Av. 22,465 70.7 55 119 257 18 Baseline Rd. Mills Av. to Monte Vista Av. 22,309 70.6 55 119 256 19 Baseline Rd. east of Monte Vista Av. 40,526 73.2 82 177 380 20 Foothill Blvd. west of Mountain Av. 28,513 71.7 65 140 301 21 Foothill Blvd. east of Mountain Av. 30,228 71.9 67 145 313 I-39

Scenario: 2015 NP Project: SERRANO PHASE II RESIDENTIAL PROJEC Roadway: Towne Avenue Analyst: JV Segment: north of Baseline Rd. Date: 17-Jan-14 ADT 514 SPEED (mph) 35 ROAD NEAR-FAR LN. DIST. 50 DAILY HOURLY Vehicles per hour 32 0 0 13 0 0 8 0 0 Speed in MPH 35 35 35 35 35 35 35 35 35 Reference levels (dba) 65.1 74.8 80.0 65.1 74.8 80.0 65.1 74.8 80.0 Flow -15.7-34.0-34.4-19.5-37.9-38.2-21.7-40.0-40.4 Distance 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 LEQ 50.3 41.6 46.5 46.4 37.8 42.6 44.3 35.6 40.5 VEHICULAR NOISE DAY= 52.2 Leq EVENING= 48.4 Leq NIGHT= 46.2 Leq NOISE LEVELS AT 50 FEET FROM CENTERLINE (dba): Ldn= 53.9 CNEL= 54.3 NOISE CONTOUR: 70 dba 65 dba 60 dba ROAD CENTERLINE DISTANCE TO NOISE CONTOUR (FEET): Ldn: 4 9 20 CNEL: 4 10 21 I-40