Agenda packet, second session — Brentwood City Council, August 13, 2024 (part 3 of 5)

HCM 6th Signalized Intersection Summary Sand Creek Sports Complex 2: Fairview Ave & Sand Creek Rd Existing PM
Fehr & Peers Synchro 11 Report
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR Lane Configurations
Traffic Volume (veh/h) 58 818 273 125 741 88 163 209 137 85 186 33 Future Volume (veh/h) 58 818 273 125 741 88 163 209 137 85 186 33 Initial Q (Qb), veh 0 0 0 0 0 0 0 0 0 0 0 0
Ped-Bike Adj(A_pbT) 1.00 1.00 1.00 1.00 1.00 0.98 1.00 0.99 Parking Bus, Adj 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 Work Zone On Approach No No No No
Adj Sat Flow, veh/h/ln 1856 1856 1856 1856 1856 1856 1856 1856 1856 1856 1856 1856 Adj Flow Rate, veh/h 61 861 107 132 780 39 172 220 36 89 196 7 Peak Hour Factor 0.95 0.95 0.95 0.95 0.95 0.95 0.95 0.95 0.95 0.95 0.95 0.95 Percent Heavy Veh, % 3 3 3 3 3 3 3 3 3 3 3 3
Cap, veh/h 82 1311 584 166 1478 657 211 363 302 179 328 276 Arrive On Green 0.05 0.37 0.37 0.09 0.42 0.42 0.12 0.20 0.20 0.10 0.18 0.18 Sat Flow, veh/h 1767 3526 1570 1767 3526 1567 1767 1856 1545 1767 1856 1559 Grp Volume(v), veh/h 61 861 107 132 780 39 172 220 36 89 196 7 Grp Sat Flow(s),veh/h/ln 1767 1763 1570 1767 1763 1567 1767 1856 1545 1767 1856 1559 Q Serve(g_s), s 2.7 16.1 3.6 5.8 13.1 1.2 7.5 8.6 1.5 3.8 7.7 0.3 Cycle Q Clear(g_c), s 2.7 16.1 3.6 5.8 13.1 1.2 7.5 8.6 1.5 3.8 7.7 0.3 Prop In Lane 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00
Lane Grp Cap(c), veh/h 82 1311 584 166 1478 657 211 363 302 179 328 276 V/C Ratio(X) 0.74 0.66 0.18 0.79 0.53 0.06 0.81 0.61 0.12 0.50 0.60 0.03 Avail Cap(c_a), veh/h 335 1782 794 335 1960 871 558 1008 840 335 750 631 HCM Platoon Ratio 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 Upstream Filter(I) 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 Uniform Delay (d), s/veh 37.2 20.7 16.8 35.1 17.1 13.7 34.0 29.1 26.2 33.7 30.0 26.9 Incr Delay (d2), s/veh 4.8 1.2 0.3 3.3 0.6 0.1 2.9 3.5 0.4 0.8 3.7 0.1 Initial Q Delay(d3),s/veh 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 %ile BackOfQ(50%),veh/ln 1.2 6.1 1.2 2.5 4.7 0.4 3.2 3.9 0.6 1.6 3.6 0.1 Unsig. Movement Delay, s/veh
LnGrp Delay(d),s/veh 42.0 21.9 17.1 38.4 17.8 13.8 36.8 32.5 26.6 34.5 33.7 27.0 LnGrp LOS D C B D B B D C C C C C
Approach Vol, veh/h 1029 951 428 292
Approach Delay, s/veh 22.6 20.5 33.8 33.7
Approach LOS C C C C
Timer - Assigned Phs 1 2 3 4 5 6 7 8
Phs Duration (G+Y+Rc), s 11.4 34.9 13.5 19.3 7.7 38.7 12.0 20.8 Change Period (Y+Rc), s 4.0 5.5 4.0 5.3 4.0 5.5 4.0 5.3 Max Green Setting (Gmax), s 15.0 40.0 25.0 32.0 15.0 44.0 15.0 43.0 Max Q Clear Time (g_c+I1), s 7.8 18.1 9.5 9.7 4.7 15.1 5.8 10.6 Green Ext Time (p_c), s 0.1 10.8 0.2 2.0 0.0 10.6 0.1 2.7 Intersection Summary
HCM 6th Ctrl Delay 24.8
HCM 6th LOS C
Notes
User approved ignoring U-Turning movement.

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HCM 6th Signalized Intersection Summary Sand Creek Sports Complex 1: Linden St & Sand Creek Rd Existing PP AM
Fehr & Peers Synchro 11 Report
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR Lane Configurations
Traffic Volume (veh/h) 6 882 20 76 936 5 22 0 52 5 0 1
Future Volume (veh/h) 6 882 20 76 936 5 22 0 52 5 0 1
Initial Q (Qb), veh 0 0 0 0 0 0 0 0 0 0 0 0
Ped-Bike Adj(A_pbT) 1.00 0.98 1.00 1.00 1.00 0.98 0.98 1.00 Parking Bus, Adj 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 Work Zone On Approach No No No No
Adj Sat Flow, veh/h/ln 1856 1856 1856 1856 1856 1856 1856 1856 1856 1856 1856 1856 Adj Flow Rate, veh/h 7 969 19 84 1029 5 24 0 5 5 0 0
Peak Hour Factor 0.92 0.91 0.91 0.91 0.91 0.92 0.91 0.92 0.91 0.92 0.92 0.92 Percent Heavy Veh, % 3 3 3 3 3 3 3 3 3 3 3 3
Cap, veh/h 509 1997 39 524 2032 10 323 0 11 363 0 66
Arrive On Green 0.56 0.56 0.56 0.56 0.56 0.56 0.04 0.00 0.04 0.04 0.00 0.00 Sat Flow, veh/h 541 3535 69 565 3598 17 1201 0 250 1541 0 1572 Grp Volume(v), veh/h 7 483 505 84 504 530 29 0 0 5 0 0
Grp Sat Flow(s),veh/h/ln 541 1763 1841 565 1763 1852 1452 0 0 1541 0 1572 Q Serve(g_s), s 0.2 4.0 4.0 2.5 4.2 4.2 0.4 0.0 0.0 0.0 0.0 0.0 Cycle Q Clear(g_c), s 4.4 4.0 4.0 6.5 4.2 4.2 0.5 0.0 0.0 0.1 0.0 0.0 Prop In Lane 1.00 0.04 1.00 0.01 0.83 0.17 1.00 1.00
Lane Grp Cap(c), veh/h 509 996 1040 524 996 1046 333 0 0 363 0 66 V/C Ratio(X) 0.01 0.49 0.49 0.16 0.51 0.51 0.09 0.00 0.00 0.01 0.00 0.00 Avail Cap(c_a), veh/h 1210 3280 3426 1256 3280 3447 1159 0 0 1159 0 975 HCM Platoon Ratio 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 Upstream Filter(I) 1.00 1.00 1.00 1.00 1.00 1.00 1.00 0.00 0.00 1.00 0.00 0.00 Uniform Delay (d), s/veh 4.5 3.2 3.2 5.1 3.2 3.2 11.3 0.0 0.0 11.1 0.0 0.0 Incr Delay (d2), s/veh 0.0 0.1 0.1 0.1 0.1 0.1 0.2 0.0 0.0 0.0 0.0 0.0 Initial Q Delay(d3),s/veh 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 %ile BackOfQ(50%),veh/ln 0.0 0.0 0.0 0.1 0.0 0.0 0.1 0.0 0.0 0.0 0.0 0.0 Unsig. Movement Delay, s/veh
LnGrp Delay(d),s/veh 4.6 3.3 3.3 5.2 3.4 3.3 11.5 0.0 0.0 11.2 0.0 0.0 LnGrp LOS A A A A A A B A A B A A
Approach Vol, veh/h 995 1118 29 5
Approach Delay, s/veh 3.3 3.5 11.5 11.2
Approach LOS A A B B
Timer - Assigned Phs 2 4 6 8
Phs Duration (G+Y+Rc), s 19.2 5.0 19.2 5.0
Change Period (Y+Rc), s 5.5 4.0 5.5 4.0
Max Green Setting (Gmax), s 45.0 15.0 45.0 15.0
Max Q Clear Time (g_c+I1), s 6.4 2.1 8.5 2.5
Green Ext Time (p_c), s 3.9 0.0 4.9 0.1
Intersection Summary
HCM 6th Ctrl Delay 3.5
HCM 6th LOS A

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HCM 6th Signalized Intersection Summary Sand Creek Sports Complex 2: Fairview Ave & Sand Creek Rd Existing PP AM
Fehr & Peers Synchro 11 Report
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR Lane Configurations
Traffic Volume (veh/h) 35 739 165 164 756 50 200 215 207 82 218 61 Future Volume (veh/h) 35 739 165 164 756 50 200 215 207 82 218 61 Initial Q (Qb), veh 0 0 0 0 0 0 0 0 0 0 0 0
Ped-Bike Adj(A_pbT) 1.00 1.00 1.00 1.00 1.00 0.98 1.00 0.99 Parking Bus, Adj 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 Work Zone On Approach No No No No
Adj Sat Flow, veh/h/ln 1856 1856 1856 1856 1856 1856 1856 1856 1856 1856 1856 1856 Adj Flow Rate, veh/h 37 786 58 174 804 22 213 229 64 87 232 13 Peak Hour Factor 0.94 0.94 0.94 0.94 0.94 0.94 0.94 0.94 0.94 0.94 0.94 0.94 Percent Heavy Veh, % 3 3 3 3 3 3 3 3 3 3 3 3
Cap, veh/h 60 1184 526 209 1482 658 251 440 366 163 347 292 Arrive On Green 0.03 0.34 0.34 0.12 0.42 0.42 0.14 0.24 0.24 0.09 0.19 0.19 Sat Flow, veh/h 1767 3526 1565 1767 3526 1565 1767 1856 1544 1767 1856 1560 Grp Volume(v), veh/h 37 786 58 174 804 22 213 229 64 87 232 13 Grp Sat Flow(s),veh/h/ln 1767 1763 1565 1767 1763 1565 1767 1856 1544 1767 1856 1560 Q Serve(g_s), s 1.8 16.6 2.2 8.4 14.9 0.7 10.2 9.3 2.9 4.1 10.1 0.6 Cycle Q Clear(g_c), s 1.8 16.6 2.2 8.4 14.9 0.7 10.2 9.3 2.9 4.1 10.1 0.6 Prop In Lane 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00
Lane Grp Cap(c), veh/h 60 1184 526 209 1482 658 251 440 366 163 347 292 V/C Ratio(X) 0.62 0.66 0.11 0.83 0.54 0.03 0.85 0.52 0.17 0.53 0.67 0.04 Avail Cap(c_a), veh/h 305 1623 721 305 1785 792 508 918 764 305 683 574 HCM Platoon Ratio 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 Upstream Filter(I) 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 Uniform Delay (d), s/veh 41.4 24.7 19.9 37.4 18.9 14.8 36.3 28.8 26.4 37.7 32.8 29.0 Incr Delay (d2), s/veh 3.8 1.4 0.2 8.0 0.7 0.0 3.1 2.0 0.5 1.0 4.7 0.1 Initial Q Delay(d3),s/veh 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 %ile BackOfQ(50%),veh/ln 0.8 6.5 0.8 3.9 5.6 0.2 4.4 4.1 1.0 1.8 4.8 0.2 Unsig. Movement Delay, s/veh
LnGrp Delay(d),s/veh 45.2 26.0 20.1 45.5 19.6 14.8 39.4 30.9 26.9 38.7 37.5 29.1 LnGrp LOS D C C D B B D C C D D C
Approach Vol, veh/h 881 1000 506 332
Approach Delay, s/veh 26.5 24.0 34.0 37.5
Approach LOS C C C D
Timer - Assigned Phs 1 2 3 4 5 6 7 8
Phs Duration (G+Y+Rc), s 14.3 34.7 16.4 21.6 7.0 42.0 12.0 25.9 Change Period (Y+Rc), s 4.0 5.5 4.0 5.3 4.0 5.5 4.0 5.3 Max Green Setting (Gmax), s 15.0 40.0 25.0 32.0 15.0 44.0 15.0 43.0 Max Q Clear Time (g_c+I1), s 10.4 18.6 12.2 12.1 3.8 16.9 6.1 11.3 Green Ext Time (p_c), s 0.1 9.4 0.2 2.3 0.0 10.5 0.1 3.0 Intersection Summary
HCM 6th Ctrl Delay 28.3
HCM 6th LOS C
Notes
User approved ignoring U-Turning movement.

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HCM 6th Signalized Intersection Summary Sand Creek Sports Complex 1: Linden St & Sand Creek Rd Existing PP PM
Fehr & Peers Synchro 11 Report
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR Lane Configurations
Traffic Volume (veh/h) 35 1121 34 21 919 33 9 0 28 23 0 4 Future Volume (veh/h) 35 1121 34 21 919 33 9 0 28 23 0 4 Initial Q (Qb), veh 0 0 0 0 0 0 0 0 0 0 0 0
Ped-Bike Adj(A_pbT) 1.00 0.98 1.00 1.00 1.00 1.00 1.00 1.00 Parking Bus, Adj 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 Work Zone On Approach No No No No
Adj Sat Flow, veh/h/ln 1856 1856 1856 1856 1856 1856 1856 1856 1856 1856 1856 1856 Adj Flow Rate, veh/h 38 1218 34 23 999 32 10 0 0 25 0 0 Peak Hour Factor 0.92 0.92 0.92 0.92 0.92 0.92 0.92 0.92 0.92 0.92 0.92 0.92 Percent Heavy Veh, % 3 3 3 3 3 3 3 3 3 3 3 3
Cap, veh/h 509 1962 55 444 1954 63 367 0 0 363 0 68
Arrive On Green 0.56 0.56 0.56 0.56 0.56 0.56 0.04 0.00 0.00 0.04 0.00 0.00 Sat Flow, veh/h 543 3501 98 440 3487 112 1539 0 0 1452 0 1572 Grp Volume(v), veh/h 38 613 639 23 505 526 10 0 0 25 0 0 Grp Sat Flow(s),veh/h/ln 543 1763 1836 440 1763 1835 1539 0 0 1452 0 1572 Q Serve(g_s), s 1.1 5.6 5.6 0.9 4.2 4.2 0.0 0.0 0.0 0.3 0.0 0.0 Cycle Q Clear(g_c), s 5.3 5.6 5.6 6.5 4.2 4.2 0.1 0.0 0.0 0.4 0.0 0.0 Prop In Lane 1.00 0.05 1.00 0.06 1.00 0.00 1.00 1.00
Lane Grp Cap(c), veh/h 509 988 1029 444 988 1028 367 0 0 363 0 68 V/C Ratio(X) 0.07 0.62 0.62 0.05 0.51 0.51 0.03 0.00 0.00 0.07 0.00 0.00 Avail Cap(c_a), veh/h 1223 3309 3446 1023 3309 3445 1186 0 0 1182 0 984 HCM Platoon Ratio 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 Upstream Filter(I) 1.00 1.00 1.00 1.00 1.00 1.00 1.00 0.00 0.00 1.00 0.00 0.00 Uniform Delay (d), s/veh 4.9 3.6 3.6 5.8 3.2 3.2 11.0 0.0 0.0 11.1 0.0 0.0 Incr Delay (d2), s/veh 0.0 0.2 0.2 0.0 0.2 0.1 0.1 0.0 0.0 0.2 0.0 0.0 Initial Q Delay(d3),s/veh 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 %ile BackOfQ(50%),veh/ln 0.0 0.1 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.0 0.0 Unsig. Movement Delay, s/veh
LnGrp Delay(d),s/veh 4.9 3.8 3.8 5.8 3.4 3.4 11.1 0.0 0.0 11.3 0.0 0.0 LnGrp LOS A A A A A A B A A B A A
Approach Vol, veh/h 1290 1054 10 25
Approach Delay, s/veh 3.8 3.4 11.1 11.3
Approach LOS A A B B
Timer - Assigned Phs 2 4 6 8
Phs Duration (G+Y+Rc), s 18.9 5.0 18.9 5.0
Change Period (Y+Rc), s 5.5 4.0 5.5 4.0
Max Green Setting (Gmax), s 45.0 15.0 45.0 15.0
Max Q Clear Time (g_c+I1), s 7.6 2.4 8.5 2.1
Green Ext Time (p_c), s 5.8 0.1 4.3 0.0
Intersection Summary
HCM 6th Ctrl Delay 3.8
HCM 6th LOS A

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HCM 6th Signalized Intersection Summary Sand Creek Sports Complex 2: Fairview Ave & Sand Creek Rd Existing PP PM
Fehr & Peers Synchro 11 Report
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR Lane Configurations
Traffic Volume (veh/h) 63 827 282 125 756 88 177 209 137 85 186 40 Future Volume (veh/h) 63 827 282 125 756 88 177 209 137 85 186 40 Initial Q (Qb), veh 0 0 0 0 0 0 0 0 0 0 0 0
Ped-Bike Adj(A_pbT) 1.00 1.00 1.00 1.00 1.00 0.98 1.00 0.99 Parking Bus, Adj 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 Work Zone On Approach No No No No
Adj Sat Flow, veh/h/ln 1856 1856 1856 1856 1856 1856 1856 1856 1856 1856 1856 1856 Adj Flow Rate, veh/h 66 871 106 132 796 38 186 220 38 89 196 8 Peak Hour Factor 0.95 0.95 0.95 0.95 0.95 0.95 0.95 0.95 0.95 0.95 0.95 0.95 Percent Heavy Veh, % 3 3 3 3 3 3 3 3 3 3 3 3
Cap, veh/h 85 1318 587 166 1479 657 226 362 302 178 311 262 Arrive On Green 0.05 0.37 0.37 0.09 0.42 0.42 0.13 0.20 0.20 0.10 0.17 0.17 Sat Flow, veh/h 1767 3526 1570 1767 3526 1567 1767 1856 1545 1767 1856 1558 Grp Volume(v), veh/h 66 871 106 132 796 38 186 220 38 89 196 8 Grp Sat Flow(s),veh/h/ln 1767 1763 1570 1767 1763 1567 1767 1856 1545 1767 1856 1558 Q Serve(g_s), s 2.9 16.3 3.6 5.8 13.5 1.1 8.2 8.6 1.6 3.8 7.8 0.3 Cycle Q Clear(g_c), s 2.9 16.3 3.6 5.8 13.5 1.1 8.2 8.6 1.6 3.8 7.8 0.3 Prop In Lane 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00
Lane Grp Cap(c), veh/h 85 1318 587 166 1479 657 226 362 302 178 311 262 V/C Ratio(X) 0.77 0.66 0.18 0.80 0.54 0.06 0.82 0.61 0.13 0.50 0.63 0.03 Avail Cap(c_a), veh/h 333 1773 790 333 1950 867 556 1003 836 333 747 627 HCM Platoon Ratio 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 Upstream Filter(I) 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 Uniform Delay (d), s/veh 37.4 20.7 16.7 35.3 17.3 13.7 33.8 29.2 26.4 33.9 30.8 27.7 Incr Delay (d2), s/veh 5.5 1.2 0.3 3.3 0.7 0.1 2.8 3.5 0.4 0.8 4.4 0.1 Initial Q Delay(d3),s/veh 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 %ile BackOfQ(50%),veh/ln 1.3 6.2 1.2 2.5 4.9 0.4 3.4 3.9 0.6 1.6 3.7 0.1 Unsig. Movement Delay, s/veh
LnGrp Delay(d),s/veh 42.9 21.9 17.0 38.5 18.0 13.8 36.6 32.7 26.8 34.7 35.2 27.8 LnGrp LOS D C B D B B D C C C D C
Approach Vol, veh/h 1043 966 444 293
Approach Delay, s/veh 22.8 20.6 33.8 34.8
Approach LOS C C C C
Timer - Assigned Phs 1 2 3 4 5 6 7 8
Phs Duration (G+Y+Rc), s 11.5 35.2 14.2 18.6 7.8 38.9 12.0 20.8 Change Period (Y+Rc), s 4.0 5.5 4.0 5.3 4.0 5.5 4.0 5.3 Max Green Setting (Gmax), s 15.0 40.0 25.0 32.0 15.0 44.0 15.0 43.0 Max Q Clear Time (g_c+I1), s 7.8 18.3 10.2 9.8 4.9 15.5 5.8 10.6 Green Ext Time (p_c), s 0.1 10.8 0.2 2.0 0.0 10.8 0.1 2.7 Intersection Summary
HCM 6th Ctrl Delay 25.1
HCM 6th LOS C
Notes
User approved ignoring U-Turning movement.

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HCM 6th TWSC
1: Linden St & Sand Creek Rd 07/17/2023
Cumulative AM Sand Creek Sports Complex 9:44 am 06/21/2023 Baseline Synchro 11 Report Fehr & Peers Page 1
Intersection
Int Delay, s/veh 9.3
Movement EBT EBR WBL WBT NBL NBR
Lane Configurations
Traffic Vol, veh/h 1247 23 89 1311 25 58
Future Vol, veh/h 1247 23 89 1311 25 58
Conflicting Peds, #/hr 0 3 3 0 3 3
Sign Control Free Free Free Free Stop Stop
RT Channelized - None - None - None
Storage Length - - 160 - 0 -
Veh in Median Storage, # 0 - - 0 0 -
Grade, % 0 - - 0 0 -
Peak Hour Factor 91 91 91 91 91 91
Heavy Vehicles, % 3 3 3 3 3 3
Mvmt Flow 1370 25 98 1441 27 64
Major/Minor Major1 Major2 Minor1
Conflicting Flow All 0 0 1398 0 2306 704
Stage 1 - - - - 1386 -
Stage 2 - - - - 920 -
Critical Hdwy - - 4.16 - 6.86 6.96
Critical Hdwy Stg 1 - - - - 5.86 -
Critical Hdwy Stg 2 - - - - 5.86 -
Follow-up Hdwy - - 2.23 - 3.53 3.33
Pot Cap-1 Maneuver - - 480 - 32 377
Stage 1 - - - - 195 -
Stage 2 - - - - 346 -
Platoon blocked, % - - -
Mov Cap-1 Maneuver - - 479 - ~ 25 375
Mov Cap-2 Maneuver - - - - ~ 25 -
Stage 1 - - - - 194 -
Stage 2 - - - - 274 -
Approach EB WB NB
HCM Control Delay, s 0 0.9 294.2

HCM LOS F
Minor Lane/Major Mvmt NBLn1 EBT EBR WBL WBT
Capacity (veh/h) 72 - - 479 -
HCM Lane V/C Ratio 1.267 - - 0.204 -
HCM Control Delay (s) 294.2 - - 14.4 -
HCM Lane LOS F - - B -
HCM 95th %tile Q(veh) 7.2 - - 0.8 -
Notes
~: Volume exceeds capacity $: Delay exceeds 300s +: Computation Not Defined *: All major volume in platoon

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HCM 6th Signalized Intersection Summary
2: Fairview Ave & Sand Creek Rd 07/17/2023
Cumulative AM Sand Creek Sports Complex 9:44 am 06/21/2023 Baseline Synchro 11 Report Fehr & Peers Page 2
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR Lane Configurations
Traffic Volume (veh/h) 40 1074 191 192 1103 59 221 240 231 104 277 76 Future Volume (veh/h) 40 1074 191 192 1103 59 221 240 231 104 277 76 Initial Q (Qb), veh 0 0 0 0 0 0 0 0 0 0 0 0
Ped-Bike Adj(A_pbT) 1.00 1.00 1.00 1.00 1.00 0.98 1.00 0.99 Parking Bus, Adj 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 Work Zone On Approach No No No No
Adj Sat Flow, veh/h/ln 1856 1856 1856 1856 1856 1856 1856 1856 1856 1856 1856 1856 Adj Flow Rate, veh/h 43 1143 97 204 1173 26 235 255 68 111 295 17 Peak Hour Factor 0.94 0.94 0.94 0.94 0.94 0.94 0.94 0.94 0.94 0.94 0.94 0.94 Percent Heavy Veh, % 3 3 3 3 3 3 3 3 3 3 3 3
Cap, veh/h 58 1235 549 231 1581 702 265 506 421 141 376 316 Arrive On Green 0.03 0.35 0.35 0.13 0.45 0.45 0.15 0.27 0.27 0.08 0.20 0.20 Sat Flow, veh/h 1767 3526 1566 1767 3526 1565 1767 1856 1546 1767 1856 1561 Grp Volume(v), veh/h 43 1143 97 204 1173 26 235 255 68 111 295 17 Grp Sat Flow(s),veh/h/ln 1767 1763 1566 1767 1763 1565 1767 1856 1546 1767 1856 1561 Q Serve(g_s), s 2.7 35.2 4.8 12.8 31.1 1.1 14.7 13.1 3.8 7.0 17.0 1.0 Cycle Q Clear(g_c), s 2.7 35.2 4.8 12.8 31.1 1.1 14.7 13.1 3.8 7.0 17.0 1.0 Prop In Lane 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00
Lane Grp Cap(c), veh/h 58 1235 549 231 1581 702 265 506 421 141 376 316 V/C Ratio(X) 0.74 0.93 0.18 0.88 0.74 0.04 0.89 0.50 0.16 0.79 0.78 0.05 Avail Cap(c_a), veh/h 234 1247 554 234 1581 702 391 706 588 234 525 442 HCM Platoon Ratio 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 Upstream Filter(I) 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 Uniform Delay (d), s/veh 54.2 35.3 25.4 48.3 25.8 17.5 47.1 34.7 31.3 51.1 42.7 36.3 Incr Delay (d2), s/veh 6.8 12.1 0.3 28.7 2.3 0.0 11.7 1.7 0.4 3.6 8.5 0.1 Initial Q Delay(d3),s/veh 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 %ile BackOfQ(50%),veh/ln 1.3 16.3 1.8 7.3 12.6 0.4 7.1 5.9 1.4 3.2 8.6 0.4 Unsig. Movement Delay, s/veh
LnGrp Delay(d),s/veh 61.0 47.4 25.8 76.9 28.1 17.5 58.8 36.3 31.7 54.7 51.2 36.5 LnGrp LOS E D C E C B E D C D D D
Approach Vol, veh/h 1283 1403 558 423
Approach Delay, s/veh 46.2 35.0 45.2 51.5
Approach LOS D C D D
Timer - Assigned Phs 1 2 3 4 5 6 7 8
Phs Duration (G+Y+Rc), s 18.8 45.1 20.9 28.2 7.7 56.2 13.0 36.1 Change Period (Y+Rc), s 4.0 5.5 4.0 5.3 4.0 5.5 4.0 5.3 Max Green Setting (Gmax), s 15.0 40.0 25.0 32.0 15.0 44.0 15.0 43.0 Max Q Clear Time (g_c+I1), s 14.8 37.2 16.7 19.0 4.7 33.1 9.0 15.1 Green Ext Time (p_c), s 0.0 2.3 0.2 2.4 0.0 8.0 0.1 3.2 Intersection Summary
HCM 6th Ctrl Delay 42.4
HCM 6th LOS D
Notes
User approved ignoring U-Turning movement.

Page 286 of 777 ends

HCM 6th TWSC
1: Linden St & Sand Creek Rd 07/17/2023
Cumulative PM Sand Creek Sports Complex 11:38 am 06/28/2023 Baseline Synchro 11 Report Fehr & Peers Page 1
Intersection
Int Delay, s/veh 2.6
Movement EBT EBR WBL WBT NBL NBR
Lane Configurations
Traffic Vol, veh/h 1537 40 25 1287 13 39
Future Vol, veh/h 1537 40 25 1287 13 39
Conflicting Peds, #/hr 0 0 0 0 0 0
Sign Control Free Free Free Free Stop Stop
RT Channelized - None - None - None
Storage Length - - 160 - 0 -
Veh in Median Storage, # 0 - - 0 0 -
Grade, % 0 - - 0 0 -
Peak Hour Factor 92 92 92 92 92 92
Heavy Vehicles, % 3 3 3 3 3 3
Mvmt Flow 1671 43 27 1399 14 42
Major/Minor Major1 Major2 Minor1
Conflicting Flow All 0 0 1714 0 2447 857
Stage 1 - - - - 1693 -
Stage 2 - - - - 754 -
Critical Hdwy - - 4.16 - 6.86 6.96
Critical Hdwy Stg 1 - - - - 5.86 -
Critical Hdwy Stg 2 - - - - 5.86 -
Follow-up Hdwy - - 2.23 - 3.53 3.33
Pot Cap-1 Maneuver - - 362 - 25 299
Stage 1 - - - - 133 -
Stage 2 - - - - 423 -
Platoon blocked, % - - -
Mov Cap-1 Maneuver - - 362 - 23 299
Mov Cap-2 Maneuver - - - - 23 -
Stage 1 - - - - 133 -
Stage 2 - - - - 391 -
Approach EB WB NB
HCM Control Delay, s 0 0.3 136.7

HCM LOS F
Minor Lane/Major Mvmt NBLn1 EBT EBR WBL WBT
Capacity (veh/h) 75 - - 362 -
HCM Lane V/C Ratio 0.754 - - 0.075 -
HCM Control Delay (s) 136.7 - - 15.8 -
HCM Lane LOS F - - C -
HCM 95th %tile Q(veh) 3.6 - - 0.2 -

Page 287 of 777 ends

HCM 6th Signalized Intersection Summary
2: Fairview Ave & Sand Creek Rd 07/17/2023
Cumulative PM Sand Creek Sports Complex 11:38 am 06/28/2023 Baseline Synchro 11 Report Fehr & Peers Page 2
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR Lane Configurations
Traffic Volume (veh/h) 68 1189 319 146 1044 103 227 291 190 106 231 41 Future Volume (veh/h) 68 1189 319 146 1044 103 227 291 190 106 231 41 Initial Q (Qb), veh 0 0 0 0 0 0 0 0 0 0 0 0
Ped-Bike Adj(A_pbT) 1.00 1.00 1.00 1.00 1.00 0.98 1.00 0.99 Parking Bus, Adj 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 Work Zone On Approach No No No No
Adj Sat Flow, veh/h/ln 1856 1856 1856 1856 1856 1856 1856 1856 1856 1856 1856 1856 Adj Flow Rate, veh/h 72 1252 181 154 1099 44 239 306 52 112 243 8 Peak Hour Factor 0.95 0.95 0.95 0.95 0.95 0.95 0.95 0.95 0.95 0.95 0.95 0.95 Percent Heavy Veh, % 3 3 3 3 3 3 3 3 3 3 3 3
Cap, veh/h 93 1349 601 184 1531 681 271 464 387 145 331 278 Arrive On Green 0.05 0.38 0.38 0.10 0.43 0.43 0.15 0.25 0.25 0.08 0.18 0.18 Sat Flow, veh/h 1767 3526 1570 1767 3526 1567 1767 1856 1547 1767 1856 1559 Grp Volume(v), veh/h 72 1252 181 154 1099 44 239 306 52 112 243 8 Grp Sat Flow(s),veh/h/ln 1767 1763 1570 1767 1763 1567 1767 1856 1547 1767 1856 1559 Q Serve(g_s), s 4.2 35.3 8.4 8.9 26.6 1.7 13.7 15.4 2.7 6.4 12.8 0.4 Cycle Q Clear(g_c), s 4.2 35.3 8.4 8.9 26.6 1.7 13.7 15.4 2.7 6.4 12.8 0.4 Prop In Lane 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00
Lane Grp Cap(c), veh/h 93 1349 601 184 1531 681 271 464 387 145 331 278 V/C Ratio(X) 0.78 0.93 0.30 0.84 0.72 0.06 0.88 0.66 0.13 0.77 0.73 0.03 Avail Cap(c_a), veh/h 255 1358 605 255 1531 681 426 769 641 255 572 481 HCM Platoon Ratio 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 Upstream Filter(I) 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 Uniform Delay (d), s/veh 48.6 30.7 22.4 45.6 24.1 17.1 43.0 34.9 30.2 46.7 40.3 35.2 Incr Delay (d2), s/veh 5.2 11.6 0.6 11.6 2.0 0.1 8.2 3.4 0.3 3.3 6.6 0.1 Initial Q Delay(d3),s/veh 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 %ile BackOfQ(50%),veh/ln 1.9 16.0 3.0 4.3 10.6 0.6 6.4 7.1 1.0 2.9 6.4 0.2 Unsig. Movement Delay, s/veh
LnGrp Delay(d),s/veh 53.8 42.3 23.0 57.3 26.2 17.2 51.2 38.3 30.5 50.0 46.9 35.3 LnGrp LOS D D C E C B D D C D D D
Approach Vol, veh/h 1505 1297 597 363
Approach Delay, s/veh 40.5 29.6 42.8 47.6
Approach LOS D C D D
Timer - Assigned Phs 1 2 3 4 5 6 7 8
Phs Duration (G+Y+Rc), s 14.8 45.2 19.9 23.8 9.4 50.6 12.5 31.3 Change Period (Y+Rc), s 4.0 5.5 4.0 5.3 4.0 5.5 4.0 5.3 Max Green Setting (Gmax), s 15.0 40.0 25.0 32.0 15.0 44.0 15.0 43.0 Max Q Clear Time (g_c+I1), s 10.9 37.3 15.7 14.8 6.2 28.6 8.4 17.4 Green Ext Time (p_c), s 0.1 2.4 0.2 2.2 0.0 10.2 0.1 3.7 Intersection Summary
HCM 6th Ctrl Delay 37.8
HCM 6th LOS D
Notes
User approved ignoring U-Turning movement.

Page 288 of 777 ends

HCM 6th Signalized Intersection Summary
1: Linden St & Sand Creek Rd 09/26/2023
Cumulative PP AM Sand Creek Sports Complex 9:44 am 06/21/2023 Baseline Synchro 11 Report Fehr & Peers Page 1
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR Lane Configurations
Traffic Volume (veh/h) 6 1247 23 89 1311 5 25 0 58 5 0 1 Future Volume (veh/h) 6 1247 23 89 1311 5 25 0 58 5 0 1 Initial Q (Qb), veh 0 0 0 0 0 0 0 0 0 0 0 0
Ped-Bike Adj(A_pbT) 1.00 0.98 1.00 1.00 1.00 0.98 0.99 1.00 Parking Bus, Adj 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 Work Zone On Approach No No No No
Adj Sat Flow, veh/h/ln 1856 1856 1856 1856 1856 1856 1856 1856 1856 1856 1856 1856 Adj Flow Rate, veh/h 7 1370 23 98 1441 5 27 0 7 5 0 0
Peak Hour Factor 0.92 0.91 0.91 0.91 0.91 0.92 0.91 0.92 0.91 0.92 0.92 0.92 Percent Heavy Veh, % 3 3 3 3 3 3 3 3 3 3 3 3
Cap, veh/h 379 2418 41 392 2457 9 238 0 13 277 0 71
Arrive On Green 0.68 0.68 0.68 0.68 0.68 0.68 0.05 0.00 0.05 0.05 0.00 0.00 Sat Flow, veh/h 366 3546 60 385 3604 13 1154 0 299 1559 0 1572 Grp Volume(v), veh/h 7 681 712 98 705 741 34 0 0 5 0 0
Grp Sat Flow(s),veh/h/ln 366 1763 1843 385 1763 1853 1453 0 0 1559 0 1572 Q Serve(g_s), s 0.4 7.0 7.0 6.2 7.4 7.4 0.7 0.0 0.0 0.0 0.0 0.0 Cycle Q Clear(g_c), s 7.7 7.0 7.0 13.1 7.4 7.4 0.8 0.0 0.0 0.1 0.0 0.0 Prop In Lane 1.00 0.03 1.00 0.01 0.79 0.21 1.00 1.00
Lane Grp Cap(c), veh/h 379 1202 1257 392 1202 1264 251 0 0 277 0 71 V/C Ratio(X) 0.02 0.57 0.57 0.25 0.59 0.59 0.14 0.00 0.00 0.02 0.00 0.00 Avail Cap(c_a), veh/h 602 2280 2384 627 2280 2397 804 0 0 809 0 678 HCM Platoon Ratio 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 Upstream Filter(I) 1.00 1.00 1.00 1.00 1.00 1.00 1.00 0.00 0.00 1.00 0.00 0.00 Uniform Delay (d), s/veh 5.0 2.9 2.9 6.3 2.9 2.9 16.2 0.0 0.0 15.9 0.0 0.0 Incr Delay (d2), s/veh 0.0 0.2 0.2 0.1 0.2 0.2 0.5 0.0 0.0 0.1 0.0 0.0 Initial Q Delay(d3),s/veh 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 %ile BackOfQ(50%),veh/ln 0.0 0.1 0.1 0.2 0.1 0.1 0.3 0.0 0.0 0.0 0.0 0.0 Unsig. Movement Delay, s/veh
LnGrp Delay(d),s/veh 5.0 3.0 3.0 6.4 3.1 3.1 16.7 0.0 0.0 16.0 0.0 0.0 LnGrp LOS A A A A A A B A A B A A
Approach Vol, veh/h 1400 1544 34 5
Approach Delay, s/veh 3.0 3.3 16.7 16.0
Approach LOS A A B B
Timer - Assigned Phs 2 4 6 8
Phs Duration (G+Y+Rc), s 29.2 5.6 29.2 5.6
Change Period (Y+Rc), s 5.5 4.0 5.5 4.0
Max Green Setting (Gmax), s 45.0 15.0 45.0 15.0
Max Q Clear Time (g_c+I1), s 9.7 2.1 15.1 2.8
Green Ext Time (p_c), s 6.5 0.0 8.5 0.1
Intersection Summary
HCM 6th Ctrl Delay 3.4
HCM 6th LOS A

Page 289 of 777 ends

HCM 6th Signalized Intersection Summary
2: Fairview Ave & Sand Creek Rd 09/26/2023
Cumulative PP AM Sand Creek Sports Complex 9:44 am 06/21/2023 Baseline Synchro 11 Report Fehr & Peers Page 2
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR Lane Configurations
Traffic Volume (veh/h) 41 1076 193 192 1105 59 223 240 231 104 277 77 Future Volume (veh/h) 41 1076 193 192 1105 59 223 240 231 104 277 77 Initial Q (Qb), veh 0 0 0 0 0 0 0 0 0 0 0 0
Ped-Bike Adj(A_pbT) 1.00 1.00 1.00 1.00 1.00 0.98 1.00 0.99 Parking Bus, Adj 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 Work Zone On Approach No No No No
Adj Sat Flow, veh/h/ln 1856 1856 1856 1856 1856 1856 1856 1856 1856 1856 1856 1856 Adj Flow Rate, veh/h 44 1145 98 204 1176 26 237 255 69 111 295 17 Peak Hour Factor 0.94 0.94 0.94 0.94 0.94 0.94 0.94 0.94 0.94 0.94 0.94 0.94 Percent Heavy Veh, % 3 3 3 3 3 3 3 3 3 3 3 3
Cap, veh/h 58 1234 548 231 1578 701 267 507 423 141 376 316 Arrive On Green 0.03 0.35 0.35 0.13 0.45 0.45 0.15 0.27 0.27 0.08 0.20 0.20 Sat Flow, veh/h 1767 3526 1566 1767 3526 1565 1767 1856 1546 1767 1856 1561 Grp Volume(v), veh/h 44 1145 98 204 1176 26 237 255 69 111 295 17 Grp Sat Flow(s),veh/h/ln 1767 1763 1566 1767 1763 1565 1767 1856 1546 1767 1856 1561 Q Serve(g_s), s 2.8 35.4 4.9 12.9 31.3 1.1 14.9 13.1 3.8 7.0 17.1 1.0 Cycle Q Clear(g_c), s 2.8 35.4 4.9 12.9 31.3 1.1 14.9 13.1 3.8 7.0 17.1 1.0 Prop In Lane 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00
Lane Grp Cap(c), veh/h 58 1234 548 231 1578 701 267 507 423 141 376 316 V/C Ratio(X) 0.75 0.93 0.18 0.88 0.75 0.04 0.89 0.50 0.16 0.79 0.79 0.05 Avail Cap(c_a), veh/h 234 1245 553 234 1578 701 390 704 587 234 524 441 HCM Platoon Ratio 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 Upstream Filter(I) 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 Uniform Delay (d), s/veh 54.3 35.5 25.5 48.4 25.9 17.6 47.2 34.7 31.3 51.2 42.9 36.4 Incr Delay (d2), s/veh 7.1 12.4 0.3 28.8 2.4 0.0 12.1 1.6 0.4 3.6 8.5 0.1 Initial Q Delay(d3),s/veh 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 %ile BackOfQ(50%),veh/ln 1.3 16.4 1.8 7.3 12.7 0.4 7.2 5.9 1.4 3.2 8.6 0.4 Unsig. Movement Delay, s/veh
LnGrp Delay(d),s/veh 61.4 47.9 25.9 77.2 28.3 17.6 59.3 36.3 31.7 54.8 51.4 36.6 LnGrp LOS E D C E C B E D C D D D
Approach Vol, veh/h 1287 1406 561 423
Approach Delay, s/veh 46.7 35.2 45.5 51.7
Approach LOS D D D D
Timer - Assigned Phs 1 2 3 4 5 6 7 8
Phs Duration (G+Y+Rc), s 18.8 45.1 21.1 28.2 7.7 56.2 13.0 36.3 Change Period (Y+Rc), s 4.0 5.5 4.0 5.3 4.0 5.5 4.0 5.3 Max Green Setting (Gmax), s 15.0 40.0 25.0 32.0 15.0 44.0 15.0 43.0 Max Q Clear Time (g_c+I1), s 14.9 37.4 16.9 19.1 4.8 33.3 9.0 15.1 Green Ext Time (p_c), s 0.0 2.2 0.2 2.4 0.0 7.9 0.1 3.3 Intersection Summary
HCM 6th Ctrl Delay 42.7
HCM 6th LOS D
Notes
User approved ignoring U-Turning movement.

Page 290 of 777 ends

HCM 6th Signalized Intersection Summary
1: Linden St & Sand Creek Rd 09/26/2023
Cumulative PP PM Sand Creek Sports Complex 11:38 am 06/28/2023 Baseline Synchro 11 Report Fehr & Peers Page 1
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR Lane Configurations
Traffic Volume (veh/h) 35 1537 40 25 1290 33 13 0 39 23 0 4 Future Volume (veh/h) 35 1537 40 25 1290 33 13 0 39 23 0 4 Initial Q (Qb), veh 0 0 0 0 0 0 0 0 0 0 0 0
Ped-Bike Adj(A_pbT) 1.00 0.98 1.00 1.00 1.00 0.99 1.00 1.00 Parking Bus, Adj 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 Work Zone On Approach No No No No
Adj Sat Flow, veh/h/ln 1856 1856 1856 1856 1856 1856 1856 1856 1856 1856 1856 1856 Adj Flow Rate, veh/h 38 1671 41 27 1402 34 14 0 7 25 0 0 Peak Hour Factor 0.92 0.92 0.92 0.92 0.92 0.92 0.92 0.92 0.92 0.92 0.92 0.92 Percent Heavy Veh, % 3 3 3 3 3 3 3 3 3 3 3 3
Cap, veh/h 378 2332 57 317 2334 57 233 0 27 293 0 82
Arrive On Green 0.66 0.66 0.66 0.66 0.66 0.66 0.05 0.00 0.05 0.05 0.00 0.00 Sat Flow, veh/h 369 3515 86 283 3518 85 1031 0 515 1477 0 1572 Grp Volume(v), veh/h 38 836 876 27 702 734 21 0 0 25 0 0 Grp Sat Flow(s),veh/h/ln 369 1763 1838 283 1763 1840 1546 0 0 1477 0 1572 Q Serve(g_s), s 2.1 10.1 10.2 2.3 7.4 7.5 0.0 0.0 0.0 0.1 0.0 0.0 Cycle Q Clear(g_c), s 9.6 10.1 10.2 12.5 7.4 7.5 0.4 0.0 0.0 0.5 0.0 0.0 Prop In Lane 1.00 0.05 1.00 0.05 0.67 0.33 1.00 1.00
Lane Grp Cap(c), veh/h 378 1169 1219 317 1169 1221 260 0 0 293 0 82 V/C Ratio(X) 0.10 0.71 0.72 0.09 0.60 0.60 0.08 0.00 0.00 0.09 0.00 0.00 Avail Cap(c_a), veh/h 631 2377 2478 510 2377 2481 837 0 0 848 0 707 HCM Platoon Ratio 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 Upstream Filter(I) 1.00 1.00 1.00 1.00 1.00 1.00 1.00 0.00 0.00 1.00 0.00 0.00 Uniform Delay (d), s/veh 5.8 3.6 3.6 7.6 3.1 3.1 15.2 0.0 0.0 15.2 0.0 0.0 Incr Delay (d2), s/veh 0.0 0.3 0.3 0.0 0.2 0.2 0.3 0.0 0.0 0.3 0.0 0.0 Initial Q Delay(d3),s/veh 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 %ile BackOfQ(50%),veh/ln 0.1 0.1 0.1 0.1 0.1 0.1 0.2 0.0 0.0 0.2 0.0 0.0 Unsig. Movement Delay, s/veh
LnGrp Delay(d),s/veh 5.9 3.9 3.9 7.7 3.3 3.3 15.5 0.0 0.0 15.5 0.0 0.0 LnGrp LOS A A A A A A B A A B A A
Approach Vol, veh/h 1750 1463 21 25
Approach Delay, s/veh 4.0 3.4 15.5 15.5
Approach LOS A A B B
Timer - Assigned Phs 2 4 6 8
Phs Duration (G+Y+Rc), s 27.6 5.7 27.6 5.7
Change Period (Y+Rc), s 5.5 4.0 5.5 4.0
Max Green Setting (Gmax), s 45.0 15.0 45.0 15.0
Max Q Clear Time (g_c+I1), s 12.2 2.5 14.5 2.4
Green Ext Time (p_c), s 9.9 0.1 7.3 0.1
Intersection Summary
HCM 6th Ctrl Delay 3.9
HCM 6th LOS A

Page 291 of 777 ends

HCM 6th Signalized Intersection Summary
2: Fairview Ave & Sand Creek Rd 09/26/2023
Cumulative PP PM Sand Creek Sports Complex 11:38 am 06/28/2023 Baseline Synchro 11 Report Fehr & Peers Page 2
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR Lane Configurations
Traffic Volume (veh/h) 73 1198 328 146 1059 103 241 291 190 106 231 48 Future Volume (veh/h) 73 1198 328 146 1059 103 241 291 190 106 231 48 Initial Q (Qb), veh 0 0 0 0 0 0 0 0 0 0 0 0
Ped-Bike Adj(A_pbT) 1.00 1.00 1.00 1.00 1.00 0.98 1.00 0.99 Parking Bus, Adj 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 Work Zone On Approach No No No No
Adj Sat Flow, veh/h/ln 1856 1856 1856 1856 1856 1856 1856 1856 1856 1856 1856 1856 Adj Flow Rate, veh/h 77 1261 185 154 1115 43 254 306 54 112 243 10 Peak Hour Factor 0.95 0.95 0.95 0.95 0.95 0.95 0.95 0.95 0.95 0.95 0.95 0.95 Percent Heavy Veh, % 3 3 3 3 3 3 3 3 3 3 3 3
Cap, veh/h 99 1333 594 184 1503 668 286 478 399 144 330 277 Arrive On Green 0.06 0.38 0.38 0.10 0.43 0.43 0.16 0.26 0.26 0.08 0.18 0.18 Sat Flow, veh/h 1767 3526 1570 1767 3526 1567 1767 1856 1547 1767 1856 1559 Grp Volume(v), veh/h 77 1261 185 154 1115 43 254 306 54 112 243 10 Grp Sat Flow(s),veh/h/ln 1767 1763 1570 1767 1763 1567 1767 1856 1547 1767 1856 1559 Q Serve(g_s), s 4.5 36.5 8.8 9.0 28.0 1.7 14.8 15.4 2.8 6.6 13.1 0.6 Cycle Q Clear(g_c), s 4.5 36.5 8.8 9.0 28.0 1.7 14.8 15.4 2.8 6.6 13.1 0.6 Prop In Lane 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00
Lane Grp Cap(c), veh/h 99 1333 594 184 1503 668 286 478 399 144 330 277 V/C Ratio(X) 0.78 0.95 0.31 0.84 0.74 0.06 0.89 0.64 0.14 0.78 0.74 0.04 Avail Cap(c_a), veh/h 251 1338 596 251 1503 668 419 757 631 251 563 473 HCM Platoon Ratio 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 Upstream Filter(I) 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 Uniform Delay (d), s/veh 49.1 31.7 23.1 46.4 25.4 17.8 43.3 34.8 30.1 47.5 41.0 35.9 Incr Delay (d2), s/veh 5.0 14.1 0.6 12.4 2.4 0.1 11.3 3.0 0.3 3.3 6.7 0.1 Initial Q Delay(d3),s/veh 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 %ile BackOfQ(50%),veh/ln 2.1 17.0 3.2 4.5 11.3 0.6 7.1 7.1 1.1 3.0 6.5 0.2 Unsig. Movement Delay, s/veh
LnGrp Delay(d),s/veh 54.1 45.8 23.7 58.8 27.8 17.9 54.6 37.8 30.4 50.8 47.7 36.0 LnGrp LOS D D C E C B D D C D D D
Approach Vol, veh/h 1523 1312 614 365
Approach Delay, s/veh 43.5 31.1 44.1 48.3
Approach LOS D C D D
Timer - Assigned Phs 1 2 3 4 5 6 7 8
Phs Duration (G+Y+Rc), s 15.0 45.4 21.0 24.0 9.9 50.4 12.6 32.5 Change Period (Y+Rc), s 4.0 5.5 4.0 5.3 4.0 5.5 4.0 5.3 Max Green Setting (Gmax), s 15.0 40.0 25.0 32.0 15.0 44.0 15.0 43.0 Max Q Clear Time (g_c+I1), s 11.0 38.5 16.8 15.1 6.5 30.0 8.6 17.4 Green Ext Time (p_c), s 0.1 1.3 0.2 2.2 0.0 9.6 0.1 3.7 Intersection Summary
HCM 6th Ctrl Delay 39.8
HCM 6th LOS D
Notes
User approved ignoring U-Turning movement.

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Appendix C:

Signal Warrant Worksheets

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Project Sand Creek Sports Complex
Major Street Sand Creek Road Scenario Existing Plus Project Minor Street Linden Street Peak Hour AM
Turn Movement Volumes Major Street Direction

NB SB EB WB
Left 22 3 5 76 North/South
Through 0 0 882 936 x East/West
Right 52 1 20 5
Total 74 4 907 1,017
31 NO
Number of Approach Lanes
* Note: Traffic Volume for Major Street is Total Volume of Both Approches.

Traffic Volume for Minor Street is the Volume of High Volume Approach.

Traffic Volume (VPH) * 1,924 74
Major Street Minor Street Warrant Met Sand Creek Road Linden Street 0 100
200
300
400
500
600
400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 Minor Street Higher Volume Approach - VPH
Major Street - Total of Both Approaches - Vehicle Per Hour (VPH) Warrant 3B, Peak Hour
* Note: 150 vph applies as the lower threshold volume for a minor-street approach with two or more lanes and 100 vph applies as the lower threshold volume for a minor-street approach with one lane.

Source: California Manual on Uniform Traffic Control Devices, Caltrans, 2014 150*
100*
2 or More Lanes & 2 or More Lanes
1 Lane & 1 Lane
2 or More Lanes & 1 Lane

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Project Sand Creek Sports Complex
Major Street Sand Creek Road Scenario Existing Plus Project Minor Street Linden Street Peak Hour AM
Turn Movement Volumes Major Street Direction

NB SB EB WB
Left 22 3 5 76 North/South
Through 0 0 882 936 x East/West
Right 52 1 20 5
Total 74 4 907 1,017
Intersection Geometry
1 4

3.5 Approach with Worst Case Delay WB
1,017
Stopped Delay (seconds per vehicle)
Total Vehicles on Approach
Number of Approach Lanes for Minor Street
Worst Case Delay for Minor Street
Not Met
Existing Plus Project
Limiting Value
Condition Satisfied?
Warrant Met
Warrant 3A, Peak Hour
NO
Total Approaches
Peak Hour Delay on
Minor Approach
(vehicle-hours)
Peak Hour Volume
on Minor Approach
(vph)
Peak Hour Entering
Volume Serviced
(vph)
Not Met Met
1 74 2,002
4 100 800

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Project Sand Creek Sports Complex
Major Street Sand Creek Road Scenario Existing Plus Project Minor Street Linden Street Peak Hour PM
Turn Movement Volumes Major Street Direction

NB SB EB WB
Left 6 17 25 21 North/South
Through 0 0 1,121 916 x East/West
Right 28 4 34 25
Total 34 21 1,180 962
Major Street Minor Street Warrant Met Sand Creek Road Linden Street 31 NO
Number of Approach Lanes
* Note: Traffic Volume for Major Street is Total Volume of Both Approches.

Traffic Volume for Minor Street is the Volume of High Volume Approach.

Traffic Volume (VPH) * 2,142 34
0 100
200
300
400
500
600
400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 Minor Street Higher Volume Approach - VPH
Major Street - Total of Both Approaches - Vehicle Per Hour (VPH) Warrant 3B, Peak Hour
* Note: 150 vph applies as the lower threshold volume for a minor-street approach with two or more lanes and 100 vph applies as the lower threshold volume for a minor-street approach with one lane.

Source: California Manual on Uniform Traffic Control Devices, Caltrans, 2014 150*
100*
2 or More Lanes & 2 or More Lanes
1 Lane & 1 Lane
2 or More Lanes & 1 Lane

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Project Sand Creek Sports Complex
Major Street Sand Creek Road Scenario Existing Plus Project Minor Street Linden Street Peak Hour PM
Turn Movement Volumes Major Street Direction

NB SB EB WB
Left 6 17 25 21 North/South
Through 0 0 1,121 916 x East/West
Right 28 4 34 25
Total 34 21 1,180 962
Intersection Geometry
1 4

3.7 Approach with Worst Case Delay WB
962
Warrant Met
Warrant 3A, Peak Hour
NO
Total Approaches
Peak Hour Delay on
Minor Approach
(vehicle-hours)
Peak Hour Volume
on Minor Approach
(vph)
Peak Hour Entering
Volume Serviced
(vph)
Not Met Met
1 34 2,197
4 100 800
Stopped Delay (seconds per vehicle)
Total Vehicles on Approach
Number of Approach Lanes for Minor Street
Worst Case Delay for Minor Street
Not Met
Existing Plus Project
Limiting Value
Condition Satisfied?

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100 Pringle Avenue | Suite 600
Walnut Creek, CA 94596
www.fehrandpeers.com

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APPENDIX D

BIOLOGICAL RESOURCES ASSESSMENT

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Providing Environmental Solutions for a Developing World 1 Greater Los Angeles
Biological Resources Assessment
Brentwood Sand Creek Sports Complex
City of Brentwood, Contra Costa County, California
Prepared For: Raney Planning & Management
Inc. 1501 Sports Drive
Suite A Sacramento, CA 95834
Report Date: January 2024
www.Bargas.com
Sacramento Valley Inland Empire San Diego

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Biological Resources Assessment
Brentwood Sand Creek Sports Complex
1773-23
January 2024
Providing Environmental Solutions for a Developing World i Project Team
Report Author(s): William Ramirez-Watson
Field Surveyor(s): Dustin Baumbach, Jinnah Benn
GIS: William Ramirez-Watson
Project Manager: Dustin Baumbach
Review Teams: Anthony Hartman, Jinnah Benn, Linda Nations Recommended Citation: Bargas. 2024. Biological Resources Assessment –Brentwood Sand Creek Sports Complex, the City of Brentwood, Contra Costa County, California. Prepared for Raney Planning & Management. January 2024.

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Biological Resources Assessment
Brentwood Sand Creek Sports Complex
1773-23
January 2024
Providing Environmental Solutions for a Developing World i Table of Contents
1 Introduction........................................................................................................................................................1

1.1 Summary of Findings..................................................................................................................................1

1.2 Project Location..........................................................................................................................................1

1.3 Project Description.....................................................................................................................................1

1.4 Definitions ..................................................................................................................................................1 2 Regulatory Setting ..............................................................................................................................................4

2.1 Federal........................................................................................................................................................4

2.1.1 Federal Endangered Species Act ........................................................................................................4

2.1.2 Migratory Bird Treaty Act...................................................................................................................5

2.1.3 Clean Water Act of the United States ................................................................................................5

2.2 State of California.......................................................................................................................................6

2.2.1 California Environmental Quality Act.................................................................................................6

2.2.2 California Endangered Species Act.....................................................................................................6

2.2.3 California Fish and Game Code...........................................................................................................7

2.2.4 California Native Plant Protection Act................................................................................................8

2.2.5 Porter-Cologne Water Quality Control Act.........................................................................................8

2.2.6 State Wetland Definition and Procedures..........................................................................................8

2.3 Local Policies and Ordinances ....................................................................................................................9

2.3.1 East Contra Costa County Habitat Conservation Plan and Natural Community Conservation Plan ..9 3 Methods ...........................................................................................................................................................10

3.1 Desktop Review....................................................................................................................................... 10

3.1.1 Biological Setting ............................................................................................................................. 10

3.1.2 Special Status Species & Habitats.................................................................................................... 10

3.1.3 Occurrence Potential....................................................................................................................... 11

3.2 Field Surveys............................................................................................................................................ 12

3.3 Habitat Analysis....................................................................................................................................... 12

3.4 Taxonomy and Nomenclature................................................................................................................. 12 4 Results ..............................................................................................................................................................13

4.1 Biological Setting ..................................................................................................................................... 13

4.2 Soils.......................................................................................................................................................... 13

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Providing Environmental Solutions for a Developing World ii

4.3 Habitats ................................................................................................................................................... 15

4.3.1 Critical Wildlife Habitat.................................................................................................................... 15

4.3.2 Disturbed ......................................................................................................................................... 15

4.4 Vegetation Communities......................................................................................................................... 15

4.4.1 Extant Vegetation Communities...................................................................................................... 15

4.4.2 Sensitive Vegetation Communities.................................................................................................. 15

4.5 Special Status Species.............................................................................................................................. 15

4.5.1 Special Status Plants........................................................................................................................ 15

4.5.2 Special Status Wildlife ..................................................................................................................... 19

4.6 Other Considerations .............................................................................................................................. 28

4.6.1 Wildlife Movement.......................................................................................................................... 28

4.6.2 Nesting Birds.................................................................................................................................... 28 5 Conclusions and Recommendations ................................................................................................................29

5.1 Special-status Plant Species .................................................................................................................... 29

5.2 Special Status Wildlife Species ................................................................................................................ 29

5.2.1 Monarch Butterfly ........................................................................................................................... 29

5.2.2 Burrowing Owl................................................................................................................................. 29

5.2.3 Giant Garter Snake .......................................................................................................................... 30

5.2.4 Swainson’s Hawk ............................................................................................................................. 30

5.2.5 San Joaquin Kit Fox .......................................................................................................................... 30

5.3 Nesting Birds............................................................................................................................................ 30 6 Literature Cited.................................................................................................................................................31 List of Tables
Table 1. Survey Summary Table .............................................................................................................................. 12 List of Figures
Figure 1. Site and Vicinity Map...................................................................................................................................2 Figure 2. Study Area ...................................................................................................................................................3 Figure 3. Map of Soils Present................................................................................................................................. 14

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Brentwood Sand Creek Sports Complex
1773-23
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Providing Environmental Solutions for a Developing World iii Appendices
A. Floral & Faunal Compendia
B. Special Status Biological Resource Summary
C. Site Photographs

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Biological Resources Assessment
Brentwood Sand Creek Sports Complex
1773-23
January 2024
Providing Environmental Solutions for a Developing World 1 1 Introduction
Bargas Environmental Consulting, LLC (Bargas) has prepared this Biological Resources Assessment (hereafter, Assessment) on behalf of Raney Planning & Management (Applicant) for the Brentwood Sand Creek Sports Complex (Project) located in Brentwood, Contra Costa County. This Assessment analyzes the potential for special status endangered, threatened, and sensitive species and their habitats to occur within the Biological Survey Area.

1.1 Summary of Findings
The Biological Survey Area includes potential habitat for one special-status wildlife species (Burrowing Owl; Athene cunicularia; California Species of Special Concern [SSC]). No aquatic resources or other sensitive habitats were observed within the Biological Survey Area.

1.2 Project Location
The proposed Project is approximately 14.48 acres located at the northwest corner of Sand Creek Road and Fairview Avenue, Brentwood, Contra Costa County, California (APN 019-110-032 and 019-110-046). The site is generally located in Section 11, Township 1 North, Range 2 East of the U.S. Geological Survey’s (USGS) 7.5- Brentwood quadrangle. The approximate center point of the Project site is 37.945°, -121.727° (WGS84). The location of the Project is shown in Figure 1.

1.3 Project Description
The project proposes to construct two or three full-size, lighted sports fields (soccer/multi-use to be determined, preferably with artificial turf), parking lot, restrooms, storage building, picnic areas, and other amenities such as pickleball courts, outdoor exercise equipment, playground, shade elements, and more.

1.4 Definitions
The following definitions for areas will be followed throughout this report:
• Project site: The Project site is defined as the 14.48 acres being analyzed for Project entitlements. • Biological Study Area: The Biological Study Area (Study Area) is defined as the 14.48-acre area within which biological resources were fully analyzed.
• Regional Study Area: The Regional Study Area is defined as the Project site and a 3-mile buffer. The Regional Study Area was used as the basis for determining special-status biological resource records for consideration in this report.

A map depicting these areas is provided as Figure 2.

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1773-23
January 2024
Providing Environmental Solutions for a Developing World 4 2 Regulatory Setting

2.1 Federal

2.1.1 Federal Endangered Species Act
The Federal Endangered Species Act (FESA) is the federal government’s primary regulation protecting rare and declining plant and wildlife species. FESA is jointly implemented by the United States Fish and Wildlife Service (USFWS) and the National Marine Fisheries Service (NMFS, addressing marine resources only). FESA protects species using the following status designations:
• A federally endangered species is a species of invertebrate, plant, or wildlife formally listed by the USFWS under FESA as facing extinction throughout all or a significant portion of its geographic range. • A federally threatened species is one formally listed by the USFWS as likely to become endangered within the foreseeable future throughout all or a significant portion of its range. • A proposed threatened or endangered species is one officially proposed by the USFWS for addition to the federal threatened or endangered species list.
• Candidate species are “plants and animals for which the USFWS has sufficient information on their biological status and threats to propose them as endangered or threatened under FESA, but for which development of a proposed listing regulation is precluded by other higher priority listing activities.” "Take" of a federally endangered or threatened species or its habitat is prohibited by federal law without a special permit. The term "take," under FESA, means to harass, harm, pursue, hunt, shoot, wound, kill, trap, capture, or collect, or to attempt to engage in such conduct. “Harm” is defined by the USFWS to encompass "an act which actually kills or injures wildlife. Such an act may include significant habitat modification or degradation where it actually kills or injures wildlife by significantly impairing essential behavioral patterns, including breeding, feeding, or sheltering" (50 CFR § 17.3).

Section 10(a)(1)(B) of the FESA allows for take of a threatened or endangered species incidental to development activities once a Habitat Conservation Plan (HCP) has been prepared to the satisfaction of the USFWS and a Section 10(a) incidental take permit has been issued to an applicant. For federal projects (including those involving federal funding), Section 7 of the FESA allows for consultation between the affected agency and the USFWS to determine what measures may be necessary to compensate for the incidental take of a listed species.

A federal project is any project that is proposed by a federal agency or is at least partially funded or authorized by a federal agency. Additionally, if the listed species or its habitat occurs in a portion of the project subject to federal jurisdiction (such as waters of the United States by the United States Army Corps of Engineers [USACE] under Section 404 of the Clean Water Act [CWA]), then consultation under Section 7 of the FESA is usually permissible and may be required.

FESA also requires the USFWS to consider whether there are areas of habitat essential to conservation for each listed species. Critical habitat designations protect these areas, including habitat that is currently unoccupied but may be essential to the recovery of a species. An area is designated as critical habitat after the USFWS publishes a proposed federal regulation in the Federal Register and then receives and considers public

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Providing Environmental Solutions for a Developing World 5 comments on the proposal. The final boundaries of critical habitat are officially designated when published in the Federal Register.

2.1.2 Migratory Bird Treaty Act
The Migratory Bird Treaty Act of 1918 (MBTA) is a federal law governing the taking, killing, possession, transportation, and importation of various birds, their eggs, parts, and nests. The take of any number of a bird species listed as protected on any one of four treaty lists is governed by the MBTA's regulation of taking migratory birds for educational, scientific, and recreational purposes and requiring harvest to be limited to levels that prevent over utilization. The MBTA also prohibits taking, possession, import, export, transport, selling, purchase, barter, or offering for sale, purchase or barter, certain bird species, their eggs, parts, and nests, except as authorized under a valid permit (50 CFR 21.11).

2.1.3 Clean Water Act of the United States
The regulatory setting with regards to aquatic resources is framed by current enabling legislation and case law.

Under Section 404 of the CWA, the USACE regulates the discharge of dredged and fill materials into “waters of the U.S.” Jurisdictional waters of the U.S. include “territorial seas, and waters which are currently used, or were used in the past, or may be susceptible to use in interstate or foreign commerce, including waters which are subject to the ebb and flow of the tide; tributaries; lakes and ponds, and impoundments of jurisdictional waters; and adjacent wetlands” (33 Code of Federal Regulations [CFR] § 328.3). Certain waters of the U.S. are considered “special aquatic sites” because they are generally recognized as having ecological value; such sites include sanctuaries and refuges, wetlands, mudflats, vegetated shallows, and riffle and pool complexes (40 CFR § 230). Special aquatic sites are defined by the U.S. Environmental Protection Agency (USEPA) and may be afforded additional consideration in a project’s permit process. The USACE also regulates navigable waters under Section 10 of the Rivers and Harbors Act of 1899. Navigable waters are defined as “… those waters of the U.S. that… are presently used, or have been used in the past, or may be susceptible to use to transport interstate or foreign commerce” (33 CFR § 322.2). Projects that place fill in jurisdictional wetlands and nonwetland waters of the U.S. require a permit from the USACE under Section 404 of the CWA. The USACE issues nationwide permits for specific types of activities with minimal individual or cumulative adverse environmental impacts. Individual permits are required for large and/or complex projects or projects that exceed the impact threshold for nationwide permits. Recent federal rulemaking has modified how the USACE defines certain waters of the U.S. The most pertinent rules are summarized below.

The USEPA published a revised definition of "waters of the United States" on December 7, 2021 in response to President Biden’s Executive Order 13990 (86 Federal Register 7037) and after Pascua Yaqui Tribe v. EPA in which the U.S. District Court of the District of Arizona "vacated and remanded" the Navigable Waters Protection Rule (86 Federal Register 69372). The proposed revision was published in the Federal Register on January 18, 2023 and took effect on March 20, 2023. Due to ongoing litigation, the agencies are interpreting “waters of the United States” consistent with pre-2015 regulations and the Supreme Court cases of Rapanos v. United States and Carabell v. United States (USEPA 2008), meaning the USACE will assert jurisdiction over traditional navigable waters (TNW) and the following types of features determined to have "significant nexus" to a TNW:

1. wetlands adjacent to TNWs,

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Providing Environmental Solutions for a Developing World 6

2. non-navigable tributaries of TNWs that are relatively permanent where the tributaries typically flow year-round or have continuous flow at least seasonally, and

3. wetlands that directly abut non-navigable tributaries of TNWs.

2.2 State of California

2.2.1 California Environmental Quality Act
The California Environmental Quality Act (CEQA) is a public disclosure process codified by California Public Resources Code 21000, requiring decision-makers to analyze the environmental impacts of a project, disclose those impacts to the public, and mitigate environmental impacts to the extent feasible. The state or local lead agency provides an evaluation of project effects on biological resources; determining the significance of those effects is guided by Appendix G of the CEQA Guidelines (AEP 2023). These evaluations must consider direct effects on a biological resource within the Study Area itself, indirect effects on adjacent resources, and cumulative effects within a larger area or region. Effects can be locally important but not significant according to CEQA if they would not substantially affect the regional population of the biological resource. Significant adverse impacts on biological resources would include the following:
• Substantial adverse effects on any species identified as candidate, sensitive, or special status in local or regional plans, policies, or regulations or by the California Department of Fish and Wildlife (CDFW) or the USFWS (these effects could be either direct or indirect [via habitat modification]); • Substantial adverse impacts to species designated by the CDFW as SSC; • Substantial adverse effects on riparian habitat or other sensitive habitat identified in local or regional plans, policies, or regulations or by CDFW and USFWS;
• Substantial adverse effects on federally protected wetlands defined under Section 404 of the CWA (these effects include direct removal, filling, or hydrologic interruption of marshes, vernal pools, coastal wetlands, or other wetland types);
• Substantial interference with movements of native resident or migratory fish or wildlife species population, or with use of native wildlife nursery sites; • Conflicts with local policies or ordinances protecting biological resources (e.g., tree preservation policies); and;
• Conflict with provisions of an adopted HCP, Natural Community Conservation Plan (NCCP), or another approved local, regional, or state habitat conservation plan.

2.2.2 California Endangered Species Act
The California Endangered Species Act (CESA) prohibits the take of state-listed threatened and endangered species. Under CESA, state agencies are required to consult with CDFW when preparing CEQA documents. Under CESA, CDFW is responsible for maintaining a list of rare, threatened, and endangered species designated under state law (California Fish and Game Code [CFGC] § 2070-2079). CDFW also maintains lists of candidate species, SSC, and fully-protected species. Candidate species are those taxa that have been formally recognized by the

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Providing Environmental Solutions for a Developing World 7 CDFW and are under review for addition to the state threatened and endangered list. Species of special concern are those taxa that are considered sensitive, and this list serves as a “watch list.” The CDFW can authorize “take” if an incidental take permit is issued by the Secretary of the Interior or of Commerce in compliance with FESA, or if the director of the CDFW issues a permit under Section 2080 in those cases where it is demonstrated that the impacts are minimized and mitigated.

2.2.3 California Fish and Game Code
Section 1600 et seq. – Lake and Streambed Alteration Agreement. Section 1600 provides provisions for protecting riparian systems, including the bed, banks, and riparian habitat of lakes, seasonal and perennial streams, and rivers. This section requires an applicant to notify CDFW and obtain a Lake and Streambed Alteration Agreement (LSAA) if their project would divert or obstruct the natural flow of any river, stream, or lake; change the bed, channel, or bank of any river, stream, or lake; use material from any river, stream, or lake; or deposit or dispose of material into any river, stream, or lake.

Section 2050 et seq. – California Endangered Species Act. CESA establishes the policy of the state to conserve, protect, restore, and enhance threatened or endangered species and their habitats. CESA is administered by CDFW and prohibits the take of any species that the California Fish and Game Commission determines to be a threatened or endangered species. CESA also mandates that “state agencies should not approve projects as proposed which would jeopardize the continued existence of any endangered species or threatened species” if reasonable and prudent alternatives are available that would avoid jeopardy. CDFW administers CESA and authorizes take through CFGC 2081 Incidental Take Permits or through Section 2080.1. (For species also listed under FESA, consistency determination is with a USFWS Biological Opinion).

Section 3511 – Fully Protected Species. The legislature of the State of California designated certain species as “fully protected” prior to the creation of CESA. Section 3511 states that “fully protected” birds, or parts thereof, may not be taken or possessed at any time. Lists of fully protected species were initially developed to provide protection to those animals that were rare or faced possible extinction and included fish, mammals, amphibians and reptiles, and birds. Most fully protected species have since been listed as threatened or endangered under CESA and/or FESA.

Sections 3503, 3503.5, 3505, 3513 — Birds. These CFGC sections protect all birds, including birds of prey and all nongame birds, as well as their eggs and nests, for species that are not already listed as fully protected and that occur naturally within the state. Sections 3503 and 3503.5 of the CFGC stipulate the following regarding eggs and nests: Section 3503 states that it is unlawful to take, possess, or needlessly destroy the nest or eggs of any bird, except as otherwise provided by CFGC or any regulation made pursuant thereto; and Section 3503.5 states that is it unlawful to take, possess, or destroy any birds in the orders Falconiformes or Strigiformes (birds-ofprey) or to take, possess, or destroy the nest or eggs of any such bird except as otherwise provided by CFGC or any regulation adopted pursuant thereto. Section 3513 states that it is unlawful to take or possess any migratory nongame bird as designated in the MBTA or any part of such migratory nongame bird except as provided by rules and regulations adopted by the Secretary of the Interior under provisions of the MBTA.

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Providing Environmental Solutions for a Developing World 8

2.2.4 California Native Plant Protection Act
The California Native Plant Protection Act of 1977 (GFGC § 1900-1913) affords the CDFW Commission the authority to designate native plants as endangered or rare and protect them from “take.” The California Native Plant Society (CNPS) maintains a list of sensitive plant species native to California and assigns each a rank in the California Rare Plant Rank (CRPR) system defined below:
• List 1A: Plants presumed extirpated in California and either rare or extinct elsewhere; • List 1B: Plants are rare, threatened, or endangered in California and elsewhere; • List 2A: Plants presumed extirpated in California, but more common elsewhere; • List 2B: Plant are rare, threatened, or endangered in California, but more common elsewhere; • List 3: Plants about which more information is needed (on a review list); • List 4: Plants of limited distribution (on a watch list).

This list is further defined as described below:
• 0.1: Seriously threatened in California, meaning there is a high degree (over 80% of occurrences) and immediacy of threat;
• 0.2: Moderately threatened in California, meaning there is a moderate degree (20-80% of occurrences) and immediacy of threat;
• 0.3: Not very threatened in California, meaning there is a low degree (less than 20% of occurrences) and immediacy of threat.

All plants on Lists 1 and 2 meet the standards for state listing under the CEQA Guidelines (14 CCR § 15380). CNPS recommends that plants on Lists 3 and 4 be evaluated for consideration under CEQA.

2.2.5 Porter-Cologne Water Quality Control Act
The Porter-Cologne Water Quality Control Act of 1969 established the State Water Resources Control Board (SWRCB) and the nine Regional Water Quality Control Boards (RWQCB), collectively referred to as the Water Boards, and authorized them to provide oversight for water rights and water quality. It uses the National Pollutant Discharge Elimination System (NPDES) to monitor point source discharges into the waters of the State to prevent water quality degradation. It also protects wetlands, surface waters, and groundwater from both point and nonpoint sources of pollution.

2.2.6 State Wetland Definition and Procedures
The SWRCB adopted the “State Wetland Definition and Procedures for Discharges or Fill Material to Waters of the State” in 2019 and completed revisions to this set of procedures in 2021 (SWRCB 2021). Four major elements are included in these procedures as described below, in addition to procedures for the submittal, review and approval of CWA Section 401 permits not described in this report.

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Providing Environmental Solutions for a Developing World 9

1. Wetland definition:

An area is wetland if, under normal circumstances, (1) the area has continuous or recurrent saturation of the upper substrate caused by groundwater, or shallow surface water, or both; (2) the duration such saturation is sufficient to cause anaerobic conditions in the upper substrate; and 3) the area’s vegetation is dominated by hydrophytes or the area lacks vegetation.

2. Framework for determining waters of the state:

Waters of the state are broadly defined by the Porter-Cologne Water Quality Control Act as “any surface water or groundwater, including saline waters, within the boundaries of the state.” The 2021 procedures expand upon this definition to clearly include natural wetlands, wetlands created by modification of a surface water of the state, and artificial wetlands meeting specific criteria.

The criteria for an artificial wetland include wetlands created for agency-approved compensatory mitigation; those identified in a water quality control plan; and those greater than or equal to one acre in size unless they are constructed and maintained for wastewater treatment or disposal, sediment settling, stormwater permitting program pollutant or runoff management, surface water treatment, agricultural crop irrigation or stock watering, fire suppression, industrial processing and cooling, active surface mining, log storage, recycled water management, maximizing groundwater recharge, or rice paddies.

3. Wetland delineation procedures:

USACE-defined procedures for aquatic resources delineation (USACE 1987; USACE 2008, USACE 2010) used to assess the presence or absence of hydrophytic vegetation, hydric soils, and wetland hydrology are required by the SWRCB to delineate waters of the state, with one modification being that “the lack of vegetation does not preclude the determination of such an area that meets the definition of wetland.”

2.3 Local Policies and Ordinances

2.3.1 East Contra Costa County Habitat Conservation Plan and Natural Community Conservation Plan
The Study Area falls within the Urban Limit Line (ULL) as defined in the East Contra Costa County Habitat Conservation Plan and Natural Community Conservation Plan (ECCC HCP/NCCP). This HCP/NCCP gives authorization for limited take and conservation guidance for 28 listed species. The plan provides avoidance and mitigation measures for projects that occur near HCP/NCCP preserves as well as guidance on developer fees based on acreage and landcover type to fund conservation.

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Providing Environmental Solutions for a Developing World 10 3 Methods
This Assessment is informed by data from a desktop analysis of the literature and numerous resource databases, as well as field surveys. The methods used to complete these surveys and desktop analyses are described below.

3.1 Desktop Review
Prior to conducting field surveys, Bargas conducted an initial review of literature and data sources to characterize biological conditions and to compile records of sensitive biological resources that could potentially occur in the Study Area. The methods used for this analysis are described below.

3.1.1 Biological Setting
The biological setting includes terrain, hydrology, soils, land uses, and other features that support or inhibit biological resources in an area. To better understand the biological setting of the project, the following resources were reviewed in detail:
• USFWS’s National Wetlands Inventory to determine if surface waters and wetlands have been mapped on, or adjacent to, the Study Area.
• USGS’s National Hydrography Dataset to determine if hydrological features have been mapped on, or adjacent to, the l Study Area.
• U.S. Department of Agriculture’s National Resource Conservation Service Web Soil Survey to map and describe soil(s) within the Study Area.
• Google Earth Pro aerial map images of the Study Area, including historical aerial images.

3.1.2 Special Status Species & Habitats
Bargas has created a well-defined list of habitats and species that could reasonably be expected to occur within the Study Area. The following describes how the list of potentially occurring special status biological resources was assembled.

3.1.2.1 Data Sources
Species and habitat occurrences were queried from the following resources:
• USFWS’s Information for Planning and Consultation portal (IPaC) for a list of federally listed species and designated critical habitat recommended for impact analysis consideration, based on an upload of the Study Area limits.
• CDFW’s California Natural Diversity Database (CNDDB) for special status species and habitat records within the Regional Study Area.
• CNPS’sInventory of Rare and Endangered Plantsfor a list ofspecialstatus plantspecies occurrences within the USGS 7.5-minute quadrangles that overlap the Regional Study Area.

3.1.2.2 Special Status Designations Considered
A variety of agencies and respected non-profit organizations assess the conservation status of plant and wildlife species; however, not all are applicable to this Assessment. The following special status designations were considered when determining special status species to be discussed in this Assessment:

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Providing Environmental Solutions for a Developing World 11 • Federal Status: Species listed as Endangered (FE) or Threatened (FT), as well as species Proposed as Endangered (FPE), Proposed as Threatened (FPT), Proposed for Delisting (FPD), and Candidates (FC) for listing under the FESA.
• California Status: Species listed as Endangered (CE) or Threatened (CT), as well as species that are Candidates for Endangered (CCE) status, Threatened (CCT) status, or Delisting (CCD) under the California Endangered Species Act. Also considered are species listed as Fully Protected (FP) and Species of Special Concern (SSC).
• CNPS Status: All California Rare Plant Ranks (CRPR) maintained by the CNPS Inventory of Rare and Endangered Plants.
• Vegetation Communities: All vegetation communities mapped by the CNDDB.

3.1.3 Occurrence Potential
Following the desktop review, field surveys, and habitat analyses, Bargas assessed the potential for the occurrence of special status species in the Study Area. Biological conditions (vegetation communities, wildlife habitats, disturbances, etc.) and the habitat and life cycle requirements of special status species identified for analysis in the desktop review were considered. “Recent” occurrences are defined as observed within the past 30 years.

Based on these considerations, species were assigned to the following categories:
• Present: Species is known to occur in Study Area based on recent surveys, CNDDB (within 30 years), or other records.
• High: Species with known recent recorded occurrences/populations near the Study Area and highly suitable habitat occurs within the Study Area. Highly suitable habitat includes all necessary elements to support the species (e.g., elevation, hydrology, soils, cover, habitat type, food resources). • Moderate. Species with known recent recorded occurrences/populations near the Study Area; however, habitat within the Study Area has been moderately disturbed, fragmented, or is small in extent.

Moderately suitable habitat includes several elements to support the species (e.g., elevation, hydrology, soils, cover, habitat type, food resources). Furthermore, moderately suitable habitat may also be located at the edge of the species’ range, or there are no reported occurrences nearby. • Low. Species with few known recent recorded occurrences/populations near the Study Area and habitat within the Study Area is highly disturbed or extremely limited. A low potential is assigned to annual or perennial plant species that may have been detectable during a focused survey in the appropriate blooming period but was not found; however, small populations or scattered individuals are still considered to have a low potential to occur. Additionally, species for which poor-quality habitat may support the species within the Study Area, but the reported extant range is far outside the Study Area and/or any species observations would anticipate being migratory (i.e., not likely to reproduce within the Study Area).
• Presumed Absent/No Potential. Focused surveys were conducted and the species was not detected, or the species was found in the desktop review but suitable habitat (soil, vegetation, elevational range) was not found in the Study Area, or the Study Area is not within the known geographic range of the species.

The potential for bird species were further distinguished into those that may: 1) nest within or near the Study Area; 2) forage within or near the Study Area; and/or 3) occur on or near the Study Area only as transients during migratory flights or other dispersal events.

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3.2 Field Surveys
A field assessment was conducted for the Biological Survey Area on July 25, 2023. Meandering transects were walked on foot throughout the entire Biological Survey Area. Habitat types were documented, and plant and wildlife species were recorded. Areas that were determined to be potential habitat for a special-status species were further assessed for suitability.

Survey dates, times, personnel, and weather conditions are summarized in Table 1 below.

Table 1. Survey Summary Table
Date Biologist(s) Time
Start Conditions End Conditions
Temp Clouds Wind Temp Clouds Wind
July 25,
2023
Dustin
Baumbach,
Jinnah Benn
1400 - 1430 90°F Mostly Clear Calm, out of
the East 93°F Clear Calm, out of the East

3.3 Habitat Analysis
Habitat suitability was analyzed in situ during the site field survey and via satellite imagery during the desktop analysis.

3.4 Taxonomy and Nomenclature
Every effort was made to use naming standards that are recognized by the scientific community, with the understanding that – for many wildlife groups – scientists may not always agree on a standard source. Because of this, some common names used in this report may not be the same as those used by the underlying data sources for species records. Bargas maintains a yearly-updated reference species list which uses the following taxonomic sources:
• Birds – American Ornithological Society Check-list and Supplements (AOS 1998). • Mammals – The reference list in the CDFW’s California Wildlife Habitat Relationship (CWHR) System database (CDFW 2014), with updates based on the American Society of Mammologists, Mammal Diversity Database (2020).
• Reptiles and Amphibians – The technical website californiaherps.com, which is regularly updated based on the latest taxonomic literature.
• Fish – American Fisheries Society publication, Common and Scientific Names of Fishes from the United States, Canada, and Mexico, 7th edition (AFS 2013)
• Invertebrates – No naming standard was identified that was current and applicable to freshwater and terrestrial invertebrates. Names used by the underlying data sources when a species was first identified were retained.
• Plants – The Jepson eFlora database (Jepson Flora Project 2021)

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Providing Environmental Solutions for a Developing World 13 4 Results
This section discusses in detail what is known about biological resources in the Study Area based on information from the field survey, 76 CNDDB records, 7 CNPS records, 11 IPaC records, and one critical habitat determination in the Regional Study Area. A list of plant species observed within the Survey Area is included in Appendix A and a list of wildlife species observed is included in Appendix B.

4.1 Biological Setting
The Regional Study Area is located in a suburban residential area in the city of Brentwood, CA. The area is near the San Joaquin River Delta and the Diablo Range.

4.2 Soils
Two soil types were mapped within the Study Area using the Soil Survey Geographic Database (NRCS 2023). They include Capay clay, 0 to 3 percent slopes, Major Land Resource Area (MLRA) 17 (CaA); and Sycamore silty clay loam, clay substratum (Sp). CaA comprises 7.48 acres in the Study Area. CaA soil profile is 0 to 51 inches: clay, and 51 to 72 inches: silty clay loam. SP comprises 7.0 acres in the Study Area. The SP soil profile is 0 to 15 inches: silty clay loam, 15 to 40 inches: silt loam, and 40 to 60 inches: clay.

A map depicting the soils present as Figure 3

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4.3 Habitats
The entire Study Area is classified as disturbed habitat. The habitat type is described below.

4.3.1 Critical Wildlife Habitat
The Study Area falls within the jurisdictional boundaries for the Delta smelt (Hypomesus transpacificus; FT; SE), which isthreatened under the ESA and endangered under the CESA. The USFWS has designated this area as critical habitat; however, Delta smelt is only found in aquatic habitats below the high tide line. The Study Area does not contain aquatic habitat and therefore does not support Delta smelt.

4.3.2 Disturbed
The entire Study Area (14.48 acres) is comprised of disturbed habitat consisting of plowed fields.

4.4 Vegetation Communities

4.4.1 Extant Vegetation Communities
The vegetation community within the Study Area is comprised of Mediterranean grasses and forbs including, but not limited to, Foxtail barley (Hordeum murinum), Italian rye grass (Festuca perennis), Italian thistle (Carduus tenuiflorus), and Wild radish (Raphanus raphanistrum).

4.4.2 Sensitive Vegetation Communities
No sensitive vegetation communities were mapped by the CNDDB within the Regional Study Area.

4.5 Special Status Species

4.5.1 Special Status Plants
The desktop review determined that 10 plant taxa with special status had been documented as occurring within the Regional Study Area.

4.5.1.1 Taxa With No Potential for Occurrence
All 10 special status plant taxa from desktop analysis were determined to have No potential for occurrence in the Study Area.

Bolander's Water-Hemlock
Apiaceae > Cicuta maculata var. bolanderi
FESA: None, CESA: None, CRPR 2B.1
California Endemic: False
Growth Habit: perennial herb blooms Jul-Sep
Habitat Requirements: Marshes and swamps at elevations ranging from 0 to 655 feet.

Inclusion Source(s): CNPS
CNDDB Records: 0
Nearest CNDDB
Record: None

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Providing Environmental Solutions for a Developing World 16 Habitat Present: Not Present
Soils Present: Unknown
Determination
Reason:

The Study Area lacks the tidal salt marsh habitat necessary to support Cicuta maculata var. bolanderi
Suisun Marsh Aster
Asteraceae > Symphyotrichum lentum
FESA: None, CESA: None, CRPR 1B.2
California Endemic: True
Growth Habit: perennial rhizomatous herb blooms (Apr) May-Nov Habitat Requirements: Marshes and swamps at elevations ranging from 0 to 10 feet.

Inclusion Source(s): CNPS
CNDDB Records: 0
Nearest CNDDB
Record: None
Habitat Present: Not Present
Soils Present: Unknown
Determination
Reason:

The Study Area lacks suitable wetland habitat to support Symphyotrichum lentum.

Big Tarplant
Asteraceae > Blepharizonia plumosa
FESA: None, CESA: None, CRPR 1B.1
California Endemic: True
Growth Habit: annual herb blooms Jul-Oct
Habitat Requirements: Valley and foothill grassland at elevations ranging from 100 to 1,655 feet.

Microhabitat: Clay (usually)
Inclusion Source(s): CNPS
CNDDB Records: 0
Nearest CNDDB
Record: None
Habitat Present: Not Present
Soils Present: Unknown
Determination
Reason:

The Study Area is not within the elevation range for Bleparizonia plumosa.

Additionally, the Study Area exceeds the species tolerance for accumulated temperature.

Brewer's Western Flax
Linaceae > Hesperolinon breweri
FESA: None, CESA: None, CRPR 1B.2
California Endemic: True
Growth Habit: annual herb blooms May-Jul
Habitat Requirements: Chaparral, Cismontane woodland, Valley and foothill grassland at elevations ranging from 100 to 3100 feet.

Microhabitat: Serpentine (usually)
Inclusion Source(s): CNDDB, CNPS

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Providing Environmental Solutions for a Developing World 17 CNDDB Records: 1
Nearest CNDDB Record: 1 to 3 Miles
Habitat Present: Not Present
Soils Present: Unknown
Determination Reason:

Hesperolinon breweri grows mostly on sloped habitats, which is missing from the Study Area. The Study Area has a warmer average than the species tolerance. The area also receives less precipitation than the plant tolerance.

Antioch Dunes Evening-Primrose
Onagraceae > Oenothera deltoides ssp. howellii
FESA: Federal Endangered, CESA: California Endangered, CRPR 1B.1 California Endemic: True
Growth Habit: perennial herb blooms Mar-Sep
Habitat Requirements: Inland dunes at elevations ranging from 0 to 100 feet.

Inclusion Source(s): CNDDB, CNPS
CNDDB Records: 1
Nearest CNDDB
Record: 1 to 3 Miles
Habitat Present: Not Present
Soils Present: No
Determination
Reason:

The Study Area lacks the sand dune habitat necessary to support this species.

This plant is only known to be found at Antioch Dunes National Wildlife Refuge.

Showy Golden Madia
Asteraceae > Madia radiata
FESA: None, CESA: None, CRPR 1B.1
California Endemic: True
Growth Habit: annual herb blooms Mar-May
Habitat Requirements: Cismontane woodland, Valley and Foothill Grassland at elevations ranging from 80 to 3,985 feet.

Inclusion Source(s): CNDDB
CNDDB Records: 1
Nearest CNDDB
Record: 1 to 3 Miles
Habitat Present: Not Present
Soils Present: Unknown
Determination
Reason:

Madia radiata is endemic to the area however it is presumed extirpated.

The CNDDB record shows the nearest record dates to 1941. Additionally, the Study Area is lower in elevation than the species tolerance.

Caper-fruited Tropidocarpum
Brassicaceae > Tropidocarpum capparideum
FESA: None, CESA: None, CRPR 1B.1
California Endemic: True

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Providing Environmental Solutions for a Developing World 18 Growth Habit: annual herb blooms Mar-Apr
Habitat Requirements: Valley and Foothill Grassland at elevations ranging from 5 to 1,495 feet.

Inclusion Source(s): CNPS
CNDDB Records: 0
Nearest CNDDB
Record: None
Habitat Present: Not Present
Soils Present: Unknown
Determination
Reason:

Tropidocarpum capparideum was last seen in 1957. It is likely extirpated from the area.

San Joaquin Spearscale
Chenopodiaceae > Extriplex joaquinana
FESA: None, CESA: None, CRPR 1B.2
California Endemic: True
Growth Habit: Annual herb blooms Apr-Oct
Habitat Requirements: Chenopod scrub, Meadows and Seeps, Playas, Valley and Foothill Grassland at elevations ranging from 5 to 2,740 feet.

Microhabitat: Alkaline
Inclusion Source(s): CNDDB, CNPS
CNDDB Records: 4
Nearest CNDDB
Record: 1 to 3 Miles
Habitat Present: Not Present
Soils Present: Unknown
Determination
Reason:

The Study Area lacks the soil conditions necessary to support Extriplex joaquinana.

Brittlescale
Chenopodiaceae > Atriplex depressa
FESA: None, CESA: None, CRPR 1B.2
California Endemic: True
Growth Habit: Annual herb blooms Apr-Oct
Habitat Requirements: Chenopod scrub, Meadows and Seeps, Playas, Valley and Foothill Grassland, Vernal pools at elevations ranging from 5 to 1,050 feet.

Microhabitat: Alkaline, Clay
Inclusion Source(s): CNDDB
CNDDB Records: 2
Nearest CNDDB
Record: 1 to 3 Miles
Habitat Present: Not Present
Soils Present: Unknown
Determination
Reason:

Atriplex depressa is unlikely to occur due to regular human disturbance on the Project site.

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Providing Environmental Solutions for a Developing World 19 Stinkbells
Liliaceae > Fritillaria agrestis
FESA: None, CESA: None, CRPR 4.2
California Endemic: True
Growth Habit: Perennial bulbiferous herb blooms Mar-Jun Habitat Requirements: Chaparral, Cismontane woodland, Pinyon and juniper woodland, Valley and foothill grassland at elevations ranging from 35 to 5,100 feet.

Microhabitat: Clay, Serpentinite (sometimes)
Inclusion Source(s): CNDDB
CNDDB Records: 1
Nearest CNDDB
Record: 1 to 3 Miles
Habitat Present: Not Present
Soils Present: Unknown
Determination Reason:

The Study Area is at a lower elevation than Fritillaria agrestis is able tolerate and is unlikely to be present.

4.5.2 Special Status Wildlife
The desktop review determined that 16 wildlife taxa with special status had been documented as occurring within the Regional Study Area. These taxa and their occurrence potential are summarized below.

4.5.2.1 Taxa With Moderate Potential for Occurrence
The following one special status wildlife taxa from desktop analysis were determined to have Moderate potential for occurrence in the Study Area:

Burrowing Owl
Strigidae > Athene cunicularia
California Species of Special Concern
Life History: A yearlong resident of open, dry grassland and desert habitats, and in grass, forb, and open shrub stages of Pinyon-Juniper and Ponderosa Pine habitats. Formerly common in appropriate habitats throughout the state, excluding the humid northwest coastal forests and high mountains.

Numbers markedly reduced in recent decades. Present on the larger offshore islands. Found as high as 1600 meters (5,300 feet) in Lassen County. Source: California Department of Fish and Wildlife. California Interagency Wildlife Task Group. 2014. CWHR version 9.0 personal computer program. Sacramento, CA.

Inclusion Source(s): CNDDB
CNDDB Records: 35
Nearest CNDDB
Record:

Overlaps
Habitat Present: Medium Quality

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Providing Environmental Solutions for a Developing World 20 Determination Reason: Burrowing Owls are able to utilize disturbed open fields for sheltering and nesting. The Study Area is a disturbed open field with at least one burrow and low tufts of vegetation considered suitable this species.

4.5.2.2 Taxa With Low Potential for Occurrence
The following nine special status wildlife taxa from desktop analysis were determined to have Low potential for occurrence in the Study Area.

Monarch - California Overwintering Population
Nymphalidae > Danaus plexippus
Federal Candidate
Life History: The iconic black and orange Monarch butterfly is known for its astonishing long-distance annual migration and reliance on milkweed as its obligate larval host plant. Though genetically similar, there are two subpopulations of Monarchs in North America, with the eastern population overwintering in Mexico and breeding in the midwestern states, and the western population overwintering in coastal California and fanning out across the west from Arizona to Idaho. Both North American migratory populations have declined over the past twenty years due to a suite of interrelated factors including habitat loss in breeding and overwintering sites, habitat degradation, disease, pesticide exposure, and climate change. Recently the western population has experienced dramatic swings, for a low of less than 2,000 in 2020-21 to over 200,000 in 2021-22. While it is unclear which of the many factors are driving these dynamics, insect population commonly fluctuate from year to year. Though more research is needed, a stable population for western monarchs is likely closer to the historic averages in the 1980s, which are estimated to have ranged between one to four million overwintering butterflies. Source:
https://wildlife.ca.gov/Conservation/Invertebrates/Monarch-Butterfly Inclusion Source(s): IPaC
CNDDB Records: 0
Nearest CNDDB
Record:

None
Habitat Present: Low Quality
Determination Reason: Danaus plexippus may use the Study Area for transit; however, milkweed has not been documented within the Study Area. The Study area has the potential to support two of six milkweed species that host caterpillars of Asclepias californica and Asclepias eriocarpa but is unlikely to occur since the Study Area is ploughed on a regular basis. There are portions on the northern section of the Study Area however that did not show signs of ploughing during the survey and could support milkweed if no disturbance occurs.

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Providing Environmental Solutions for a Developing World 21 California Red-legged Frog
Ranidae > Rana draytonii
Federal Threatened; California Species of Special Concern Life History:

The California Red-legged Frog inhabits quiet pools of streams, marshes, and occasionally ponds. Occurs along the Coast Ranges from Mendocino County south and in portions of the Sierra Nevada and Cascades Ranges, usually below 1200 meters (3,936 feet). This species was once a subspecies of Rana aurora, then known as the Red-legged Frog, and has been elevated to species-level status. Source: California Department of Fish and Wildlife. California Interagency Wildlife Task Group. 2014. CWHR version 9.0 personal computer program. Sacramento, CA.

Inclusion Source(s): CNDDB
CNDDB Records: 1
Nearest CNDDB
Record: 1 to 3 Miles
Habitat Present: Low Quality
Determination
Reason:

California Red-legged frog favors calm flowing water with vegetation cover. The site lacks this type of habitat.

California Tiger Salamander
Ambystomatidae > Ambystoma californiense
Federal Endangered; California Endangered
Life History:

Most commonly found in Annual Grassland habitat, but also occurs in the grassy understory of Valley-Foothill Hardwood habitats, and uncommonly along stream courses in Valley-Foothill Riparian habitats. The species occurs from near Petaluma, Sonoma County, east through the Central Valley to Yolo and Sacramento counties and south to Tulare County; and from the vicinity of San Francisco Bay south to Santa Barbara County. They occur at elevations from 3 meters up to 1054 meters (3,200 feet). Source:

California Department of Fish and Wildlife. California Interagency Wildlife Task Group. 2014. CWHR version 9.0 personal computer program.

Sacramento, CA.

Inclusion Source(s): CNDDB; IPaC
CNDDB Records: 4
Nearest CNDDB
Record: 1 to 3 Miles
Habitat Present: Low Quality
Determination
Reason:

California Tiger Salamander is able to utilize open fields during the nonbreeding season. However, recent plowing of the Study Area combined with the lack of vegetation presents low quality habitat.

Northern Legless Lizard
Anniellidae > Anniella pulchra

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Providing Environmental Solutions for a Developing World 22 California Species of Special Concern
Life History:

This secretive, fossorial lizard is common in suitable habitats in the Coast Ranges from the vicinity of Antioch, Contra Costa County south to Ventura County. Legless lizards are of spotty occurrence throughout the rest of their range, which includes the floor of the San Joaquin Valley from San Joaquin County south, the west slope of the southern Sierra, the Tehachapi Mountains west of the desert, and the mountains of southern California. The specific identity of some populations within this range is unknown. Elevation is from near sea level to about 1800 meters (6,000 feet) in the Sierra. Common in several habitats but especially in Coastal Dune, Valley-Foothill, Chaparral, and Coastal Scrub types. Source:

California Department of Fish and Wildlife. California Interagency Wildlife Task Group. 2014. CWHR version 9.0 personal computer program.

Sacramento, CA.

Inclusion Source(s): CNDDB
CNDDB Records: 1
Nearest CNDDB
Record: < 1 Mile
Habitat Present: Low Quality
Determination
Reason:

Northern Legless lizards prefer moist, sandy soil with a cover of leaf litter.

The site lacks this type of substrate.

Swainson's Hawk
Accipitridae > Buteo swainsoni
California Threatened
Life History:

Uncommon breeding resident and migrant in the Central Valley, Klamath Basin, Northeastern Plateau, Lassen County, and Mojave Desert. Very limited breeding reported from Lanfair Valley, Owens Valley, Fish Lake Valley, and Antelope Valley. Breeds in stands with few trees in junipersage flats, riparian areas, and in oak savannah in the Central Valley.

Forages in adjacent grasslands or suitable grain or alfalfa fields, or livestock pastures. In southern California, now mostly limited to spring and fall transient. Formerly abundant in California with wider breeding range.

Decline resulted in part from loss of nesting habitat. Source: California Department of Fish and Wildlife. California Interagency Wildlife Task Group. 2014. CWHR version 9.0 personal computer program. Sacramento, CA.

Inclusion Source(s): CNDDB
CNDDB Records: 3
Nearest CNDDB
Record: < 1 Mile
Habitat Present: Low Quality
Determination Reason: Study Area is unsuitable for nesting as there are no structures to build nests on.

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Providing Environmental Solutions for a Developing World 23 White-tailed Kite
Accipitridae > Elanus leucurus
California Fully Protected
Life History:

Common to uncommon, yearlong resident in coastal and valley lowlands; rarely found away from agricultural areas. Inhabits herbaceous and open stages of most habitats mostly in cismontane California. Has extended range and increased numbers in recent decades. Source: California Department of Fish and Wildlife. California Interagency Wildlife Task Group. 2014. California Wildlife Habitat Relationship (CWHR) System version 9.0 personal computer program. Sacramento, CA.

Inclusion Source(s): CNDDB
CNDDB Records: 1
Nearest CNDDB
Record: 1 to 3 Miles
Habitat Present: Low Quality
Determination Reason:

White-tailed kite is a year-round resident of the Central Valley and could utilize the open field for foraging; however, the field is disturbed (ploughed regularly and there is a lack of suitable nesting structures for them within the Study Area. This species may use the Study Area for foraging or transit.

American Badger
Mustelidae > Taxidea taxus
California Species of Special Concern
Life History:

Uncommon, permanent resident found throughout most of the state, except in the northern North Coast area. Most abundant in drier open stages of most shrub, forest, and herbaceous habitats with friable soils.

Source: California Department of Fish and Wildlife. California Interagency Wildlife Task Group. 2014. CWHR version 9.0 personal computer program.

Sacramento, CA.

Inclusion Source(s): CNDDB
CNDDB Records: 1
Nearest CNDDB Record: 1 to 3 Miles
Habitat Present: Low Quality
Determination Reason:

The American badger is able to utilize barren fields as habitat but require large continuous tracts of land to support them. The Study Area may be utilized by this species for transit.

Giant Garter Snake
Natricidae > Thamnophis gigas
California Threatened, Federally Threatened
Life History:

Historically occupied the Sacramento and Jan Joaquin valleys, but current range is much reduced. Primarily associated with marshes and sloughs.

Snakes are active from mid-March until October. Giant garter snakes forage for fish and amphibians and amphibian larvae primarily in and along streams. They are diurnal and often bask on emergent vegetation

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Providing Environmental Solutions for a Developing World 24 such as cattails and tules. At night they take refuge at night in mammal burrows, crevices and other small holes.

Inclusion Source(s): ECCC HCP
CNDDB Records:

Nearest CNDDB
Record: N/A
Habitat Present: Low Quality
Determination
Reason:

The Survey Area is within 200 feet of Sand Creek (a direct tributary to the San Joaquin River). While no foraging habitat is within the Survey Area, the giant garter snake could utilize the unploughed portions of the site for refuge at night. Source: California Wildlife Habitat Relationships System.

California Interagency Wildlife Task Group. CWHR version 9.0 personal computer program. Sacramento, CA.

San Joaquin Kit Fox
Canidae > Vulpes macrotis mutica
Federal Endangered; California Threatened
Life History:

The San Joaquin Kit Fox (Vulpes macrotis mutica) is the smallest fox in North America, with an average body length of 20 inches and weight of about 5 pounds. Kit Foxes start breeding when they are one year old. In the fall, females begin to clean and enlarge their pupping dens. The foxes mate between December and March. Females give birth to two to six pups in February or March. The Kit Fox’s range in the San Joaquin Valley extends from southern Kern County north to Contra Costa, Alameda, and San Joaquin counties on the western side of the valley; and to the La Grange area of Stanislaus County on the eastern side of the valley. The Kit Fox’s range also includes valleys along the Coast Range including the Panoche and Cuyama valleys and the Carrizo Plain in San Luis Obispo County. Threats include habitat modification and destruction, energy development, drought, disease or pathogens, rodenticides, and predation.

Inclusion Source(s): IPaC
CNDDB Records: 0
Nearest CNDDB
Record: None
Habitat Present: Low Quality
Determination
Reason:

The San Joaquin Kit Fox needs a home range of about 1,000 acres in addition to soft sandy soils for dens, and neither of these conditions are present in Study Area. The Study Area could be accessed by fox via the adjacent creek and used for foraging as part of a greater home range.

4.5.2.3 Taxa With No Potential for Occurrence
The following seven special status wildlife taxa from desktop analysis were determined to have No potential for occurrence in the Study Area.

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Providing Environmental Solutions for a Developing World 25 Conservancy Fairy Shrimp
Branchinectidae > Branchinecta conservatio
Federal Endangered
Life History:

Conservancy fairy shrimp are located in vernal pool ecosystems primarily in the Central Valley of California from Tehama County to Merced County, with a small population in Ventura County's interior coast ranges. Their habitat is large, turbid freshwater vernal pools (playa pools) that are located in grassland, rural, or wetland communities. They eat algae, bacteria, protozoa, rotifers, and plant and animal waste. Conservancy fairy shrimp populations face threats such as habitat loss and fragmentation, grazing, invasive plants, climate change and drought, and pesticides.

Source: https://www.fws.gov/species/conservancy-fairy-shrimpbranchinecta-conservatio Inclusion Source(s): IPaC
CNDDB Records: 0
Nearest CNDDB Record: None
Habitat Present: Not Present
Determination Reason:

The Study Area was heavily plowed during the time of the survey. No wetlands (suitable habitat) were observed within the Study Area. This species therefore has no potential to occur.

Vernal Pool Fairy Shrimp
Branchinectidae > Branchinecta lynchi
Federal Threatened
Life History:

The Vernal pool fairy shrimp inhabits ephemeral pools with clear to teacolored water. This species has been most commonly observed in grass or mud-bottomed swales, earth sump, or basalt flow depression pools in unplowed grasslands. The Vernal pool fairy shrimp has been collected from early December to early May. The water in pools inhabited by this species has a pH averaging 7.0, and low TDS, conductivity, alkalinity, and chloride. Although the Vernal pool fairy shrimp is found at a number of sites, it is not abundant at any of them. It often occurs with other fairy shrimp species, but is never the numerically dominant one. Source:
https://www.govinfo.gov/content/pkg/FR-1992-05-08/pdf/FR-1992-05-

08.pdf#page=76
Inclusion Source(s): CNDDB; IPaC
CNDDB Records: 2
Nearest CNDDB
Record: 1 to 3 Miles
Habitat Present: Not Present
Determination Reason:

Field was heavily plowed during the time of the survey. Habitat to support Vernal pool fairy shrimp is not present in the Study Area.

Vernal Pool Tadpole Shrimp
Triopsidae > Lepidurus packardi

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Providing Environmental Solutions for a Developing World 26 Federal Endangered
Life History:

Vernal pool tadpole shrimp inhabits vernal pools and swales containing clear to highly turbid water. The Vernal pool tadpole shrimp is found at 14 vernal pool complexes in the Sacramento Valley from the Vina Plains in Butte County south of the Sacramento area in Sacramento County and west to the Jepson Prairie region of Solano County. The pools inhabited by the Vernal pool tadpole shrimp range in size from five square meters (16.4 square feet) in the Mather Air Force Base area of Sacramento County to the 38 hectare (89 acre) Olcott Lake at Jepson Prairie. The pools at Jepson Prairie and Vina Plains have a neutral pH, and very low conductivity, TDS, and alkalinity. These pools are most commonly located in grass-bottomed swales of unplowed grasslands in old alluvial soils underlain by hardpan, or in mud-bottomed pools containing highly turbid water. All pools known to be inhabited by this species are filled by winter and spring rains and may last until June. Source: https://www.govinfo.gov/content/pkg/FR-1992-05- 08/pdf/FR-1992-05-08.pdf#page=76
Inclusion Source(s): IPaC
CNDDB Records: 0
Nearest CNDDB
Record: None
Habitat Present: Not Present
Determination
Reason:

Field was heavily plowed during the time of the survey. Habitat to support conservancy fairy shrimp not present in the Study Area.

Valley Elderberry Longhorn Beetle
Cerambycidae > Desmocerus californicus dimorphus
Federal Threatened
Life History:

Valley elderberry longhorn beetle is a medium-sized beetle that is endemic to the Central Valley of California. The beetle is found only in association with its host plant, elderberry (Sambucus spp.) and originally occurred in elderberry thickets in moist valley oak woodland along the margins of the Sacramento and San Joaquin Rivers in the Central Valley of California. The habitat of this insect has now largely disappeared throughout much of its former range due to agricultural conversion, levee construction, and stream channelization. The clearing of undergrowth (including elderberry) and planting of lawns has resulted in further habitat degradation. Source: https://ecos.fws.gov/ecp/species/7850 Inclusion Source(s): IPaC
CNDDB Records: 0
Nearest CNDDB
Record: None
Habitat Present: Not Present
Determination
Reason:

Desmocerus californicus dimorphus utilizes riparian corridors and riverine habitat with elderberry thickets. This habitat is not present at the Study Area.

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Providing Environmental Solutions for a Developing World 27 Foothill Yellow-legged Frog
Ranidae > Rana boylii
California Endangered; California Species of Special Concern Life History:

The Foothill yellow-legged frog occurs in the Coast Ranges from the Oregon border south to the Transverse Mountains in Los Angeles County, in most of northern California west of the Cascade crest, and along the western flank of the Sierra Nevada south to Kern County. Livezey reported an isolated population in San Joaquin County, on the floor of the Central Valley. Isolated populations are also known from the mountains of Los Angeles County. Its elevation range extends from near sea level to 1940 m (6,370 feet) in the Sierra Nevada. The Foothill yellow-legged frog is found in or near rocky streams in a variety of habitats, including valley-foothill hardwood, valley-foothill hardwood-conifer, valley-foothill riparian, ponderosa pine, mixed conifer, coastal scrub, mixed chaparral, and wet meadow types. Source: California Department of Fish and Wildlife.

California Interagency Wildlife Task Group. 2014. CWHR version 9.0 personal computer program. Sacramento, CA.

Inclusion Source(s): IPaC
CNDDB Records: 0
Nearest CNDDB
Record: None
Habitat Present: Not Present
Determination
Reason:

Rana boylii occurs in rocky streams which are not present within the Study Area.

Alameda Striped Racer
Colubridae > Coluber lateralis euryxanthus
Federal Threatened; California Threatened
Life History:

Occurs only in a small area on the east side of the San Francisco Bay in Contra Costa and Alameda counties, and parts of San Joaquin and Santa Clara Counties. Differs from the more widespread California Striped Racer subspecies in having wider side stripes with more orange coloring, a darker black back, no distinct spotting under the head and neck, no dark line across the scale at the end of the nose, and an uninterrupted light stripe from the nose to the eye. Found in open areas in canyons, rocky hillsides, chaparral scrublands, open woodlands, pond edges, stream courses.

Source: California Department of Fish and Wildlife. California Interagency Wildlife Task Group. 2014. CWHR version 9.0 personal computer program.

Sacramento, CA.

Inclusion Source(s): IPaC
CNDDB Records: 0
Nearest CNDDB
Record: None
Habitat Present: Not Present
Determination
Reason:

Coluber lateralis euryxanthus, now Masticophis lateralis euryxanthus, lives in oak woodlands, oak savannah, and coastal chaparral. This habitat type is not present at the Study Area.

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1773-23
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Providing Environmental Solutions for a Developing World 28 California Condor
Cathartidae > Gymnogyps californianus
Federal Endangered; California Endangered; California Fully Protected Life History:

Endangered, permanent resident of the semi-arid, rugged mountain ranges surrounding the southern San Joaquin Valley, including the Coast Ranges from Santa Clara County south to Los Angeles County, the Transverse Ranges, Tehachapi Mountains, and southern Sierra Nevada.

Forages over wide areas of open rangelands, roosts on cliffs and in large trees and snags. Occurs mostly between sea-level and 2700 meters (0- 9,000 feet), and nests from 610-1372 meters (2,000-6,500 feet).

Nonbreeding individuals move north to Kern and Tulare Counties in April, often returning south in September to winter in Tehachapi Mountains, Mount Pinos, and Ventura and Santa Barbara Counties. Total population in early 1980s was estimated to be fewer than 20, and declining. Occurrence in the wild now in question. Two U.S. Forest Service sanctuaries set aside within the Los Padres National Forest, primarily for nesting and roosting protection. Source: California Department of Fish and Wildlife. California Interagency Wildlife Task Group. 2014. CWHR version 9.0 personal computer program. Sacramento, CA.

Inclusion Source(s): IPaC
CNDDB Records: 0
Nearest CNDDB
Record: None
Habitat Present: Not Present
Determination
Reason:

The closest know population is in Big Sur. The Study Area does not provide cliff habitat. It is unlikely for this species to be present at the Study Area.

4.6 Other Considerations

4.6.1 Wildlife Movement
There is potential for terrestrial wildlife movement through the Study Area. The Study Area is surrounded by a residential area and roads; however, Sand Creek runs adjacent to the Study Area and connects to upland habitat in Black Diamond Mines Regional Preserve. Birds may also use the area to connect to other habitats.

4.6.2 Nesting Birds
The potential for nesting birds in the Study Area is low. There are few available nesting structures such as trees or bushes. However, there is some potential for ground nesting birds such as the burrowing owl (Athene cunicularia).

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1773-23
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Providing Environmental Solutions for a Developing World 29 5 Conclusions and Recommendations

5.1 Special-status Plant Species
No suitable habitat for special-status plant species is present within the Study Area. No special-status plants were observed during the site Assessment.

5.2 Special Status Wildlife Species
The Survey Area has low quality habitat for the following nine species: Monarch Butterfly (if milkweed is present), California red-legged frog, California tiger salamander, northern legless lizard, white-tailed kite, Swainson’s hawk, giant garter snake, American badger, and San Joaquin kit fox. No breeding, nesting, and/or foraging habitat for the above listed species occurs within the Survey Area. Therefore, if the Survey Area continues to be disturbed by regular plowing, no further studies are needed.

The Survey Area has potential moderate habitat for one species: burrowing owl.

5.2.1 Monarch Butterfly
Though not covered by the ECCC HCP, the Monarch butterfly is a federal Candidate species. Milkweed (host plant for the Monarch butterfly) has potential to occur within the Study Area. A plant survey during the appropriate bloom period for milkweed (June – September) is recommended prior to construction to determine if potential habitat for the Monarch butterfly occurs within the Study Area. Regular plowing within the Study Area would prevent the establishment of milkweed eliminating the need for a preconstruction survey. Portions of the northern section of the Study Area along Old Sand Creek Road were not plowed at the time of the survey visit and may support milkweed if left undisturbed. If milkweed is found within the Project site during the plant survey, species-specific surveys should be conducted for the Monarch butterfly.

5.2.2 Burrowing Owl
An empty burrow was observed on the north side of the Biological Survey Area where mounds of dirt have been piled. This is an individual burrow that was not confirmed to be active and is not surrounded by additional burrows.

Burrowing owl tend to use areas with a high density of surrounding burrows. According to the ECCC HCP Chapter 6, if the proposed project can’t fully avoid impacts to burrowing owl habitat, preconstruction surveys conducted in accordance with CDFG survey guidelines are required. If a nesting burrowing owl is found during the breeding season (February 1 – August 31), the following avoidance, minimization, and construction monitoring measures are required per the ECCC HCP:
• Avoid all nest sites that could be disturbed by project construction for the duration of the breeding season (February 1 – August 31) or while the nest is occupied by adults or young. Avoidance includes establishment of a 250 foot no work buffer zone around nests. • Construction may occur during the breeding season if a qualified biologist monitors the nest and determines that the birds have not begun egg-laying and incubation or that the juveniles from the occupied burrows have fledged.

If possible, during the nonbreeding season (September 1 – January 31), owls and any occupied burrows should be avoided with the establishment of a 160 foot no work buffer zone. If avoidance is not possible, relocation may be

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Providing Environmental Solutions for a Developing World 30 implemented. Owls may be excluded from burrows within the immediate work area and a 160-foot buffer zone, by installing one-way doors.

5.2.3 Giant Garter Snake
Giant garter snakes (GGS) are unlikely to occur on-site due to lack of foraging habitat; however, the Project site is within 200 feet of Sand Creek that may support GGS. Though no occurrence records of GGS are within the Regional Study Area, it is covered by the ECCC HCP. Per the HCP, preconstruction surveys are to be conducted if suitable habitat is present. Preconstruction surveys should therefore be conducted in areas identified in the planning surveys as having suitable garter snake habitat and 200 feet of adjacent uplands, measured from the outer edge of the bank. The purpose of the survey is to delineate suitable habitat and document any sightings of the snake.

In addition, the following Avoidance and Minimization Requirements should be adhered to if GGS are observed or if suitable habitat for the species is discovered during the survey:
• If feasible, a 200-foot no-disturbance buffer should be established from the edge of the stream. • If disturbance within the 200-foot buffer cannot be avoided, the measures as outlined in the ECCC HCP should be followed. Specifically, construction activity that disturbs habitat to the period between May 1 and September 30 should be limited.

5.2.4 Swainson’s Hawk
Although Swainson’s hawk is a covered species under the ECCC HCP, no tall trees are present on the project site to support breeding or nesting. Therefore, no avoidance, minimization, or mitigation measures are required for this species.

5.2.5 San Joaquin Kit Fox
Although the San Joaquin Kit Fox is covered under the ECCC HCP, no breeding habitat or dens were observed on the Project Site. Additionally, the Project site is heavily disturbed by routine plowing that would prevent occurrence of any suitable breeding or denning habitat. Therefore, no avoidance, minimization, or mitigation measures are required for this species.

5.3 Nesting Birds
The Survey Area has potential nesting habitat for ground nesting birds in a small unplowed area in the northern portion of the site. In addition, habitat for other ground nesting birds covered by MBTA surrounds the Project site in the form of gravel shoulders and pullout areas. Additionally, potential raptor nesting habitat may be within 500 feet of the Project site. A nesting bird survey should therefore be conducted within the Project site and a 500-foot buffer prior to the start of construction activities to identify any potential nests protected by the Migratory Bird Treaty Act.

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Providing Environmental Solutions for a Developing World 31 6 Literature Cited
AEP. 2023. 2023 California Environmental Quality Act (CEQA) Statute & Guidelines. AEP (eds.) 2023. CEQA Handbook, p. 387. https://www.califaep.org/docs/CEQA_Handbook_2023_final.pdf.

American Fisheries Society (AFS). 2013. Common and Scientific Names of Fishes from the United States, Canada, and Mexico, 7th edition. Special Publication 34.

American Ornithological Society (AOS). 1998. Check-list of North American Birds (and Supplements). American Ornithologists Union and American Ornithological Society.

American Society of Mammologists. 2020. Mammal Diversity Database (Version 1.2) [Data set]. Zenodo. http://doi.org/10.5281/zenodo.4139818
California Department of Fish and Wildlife (CDFW). California Interagency Wildlife Task Group. 2014. California Wildlife Habitat Relationship (CWHR) System version 9.0 personal computer program. Sacramento, CA.

California Native Plant Society (CNPS) A Manual of California Vegetation (online). 2023. https://vegetation.cnps.org/
Eastern Contra Costa County Habitat Conservation Plan & Natural Community Conservation Plan (HCP/NCCP). 2007
Jepson Flora Project (eds.) 2021. Jepson eFlora, https://ucjeps.berkeley.edu/eflora/.

NRCS. 2023. Web Soil Survey. https://websoilsurvey.sc.egov.usda.gov/.

SWRCB. 2021. “State Policy for Water Quality Control: State Wetland Definition and Procedures for Discharges of Dredged or Fill Material to Waters of the State.” State Water Resources Control Board. p. 28 USEPA. 2008. Clean Water Act Jurisdiction Following the U.S. Supreme Court's Decision in Rapanos v. United States & Carabell v. United Station. United States Environmental Protection Agency, p. 13.

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Providing Environmental Solutions for a Developing World i Appendix A. Floral & Faunal Compendia
The following plants and wildlife were observed during the July 25, 2023 survey:

Plants
Common Name Scientific Name Family Major Clade Nativity Italian Thistle Carduus tenuiflorus Asteraceae Eudicots Naturalized Yellow Star Thistle Centaurea solstitialis Asteraceae Eudicots Naturalized Prickly Lettuce Lactuca serriola Asteraceae Eudicots Naturalized Black Mustard Brassica nigra Brassicaceae Eudicots Naturalized Wild Radish Raphanus raphanistrum Brassicaceae Eudicots Naturalized Field Bindweed Convolvulus arvensis Convolvulaceae Eudicots Naturalized Doveweed, Turkey-Mullein Croton setiger Euphorbiaceae Eudicots Native Puncture Vine Tribulus terrestris Zygophyllaceae Eudicots Naturalized Palm tree Washingtonia ssp. Arecaceae Monocots Naturalized Wild Oat Avena fatua Poaceae Monocots Naturalized
Italian Rye Grass Festuca perennis Poaceae Monocots Naturalized Wall Barley Hordeum murinum Poaceae Monocots Naturalized Wildlife
Common Name Scientific Name Family Introduced/Endemic
Red-Tailed Hawk Buteo jamaicensis Accipitridae Native

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Providing Environmental Solutions for a Developing World ii Appendix B. Special Status Biological Resource Summary
The research conducted for this report included a desktop review of numerous resource databases in order to determine a list of special status biological resources, including 10 plant taxa and 17 wildlife taxa to be analyzed for potential occurrence. The result of this analysis is summarized in the tables below. Table column definitions:
• Common Name: The most widely-accepted English common name for the taxon. • Scientific Name: The most widely-accepted scientific name for the taxon. • Source(s): The desktop review source(s) that contained this taxon. • Legal Status: The legal protected status of the taxon. These terms are described in detail in the Methods section of this report.
• Habitat: The quality of the habitat in the Study Area for supporting the taxon. Classification of habitats is described in detail in the Methods section of this report.
• Soils: The suitability of soils in the Study Area to support the taxon, if known. Classification of soils is described in detail in the Methods section of this report.
• Potential: The potential for the taxon to be found in the Study Area. Ranking of potential is described in detail in the Methods section of this report.

Plants
Common Name Scientific Name Source(s) Legal Status Habitat Soils Potential Bolander's WaterHemlockCicuta maculata
var. bolanderi
CNPS CRPR 2B.1 Not Present No None
Big Tarplant Blepharizonia
plumosa
CNPS CRPR 1B.1 Not Present Yes None
Showy Golden Madia Madia radiata CNDDB CRPR 1B.1 Not Present Unknown None Suisun Marsh Aster Symphyotrichum
lentum
CNPS CRPR 1B.2 Not Present No None
Caper-fruited
Tropidocarpum
Tropidocarpum
capparideum
CNPS CRPR 1B.1 Not Present Unknown None
San Joaquin Spearscale Extriplex
joaquinana
CNDDB;
CNPS
CRPR 1B.2 Not Present Yes None
Brittlescale Atriplex depressa CNDDB CRPR 1B.2 Not Present Yes None Brewer's Western Flax Hesperolinon
breweri
CNDDB;
CNPS
CRPR 1B.2 Not Present No None

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Providing Environmental Solutions for a Developing World iii Common Name Scientific Name Source(s) Legal Status Habitat Soils Potential Antioch Dunes EveningPrimrose
Oenothera
deltoides ssp.
howellii
CNDDB;
CNPS
FE; CE;
CRPR 1B.1
Not Present No None
Stinkbells Fritillaria agrestis CNDDB CRPR 4.2 Not Present Yes None Wildlife
Common Name Scientific Name Source(s) Legal
Status
Habitat Potential
Conservancy Fairy
Shrimp
Branchinecta conservatio IPaC FE Not Present None
Vernal Pool Fairy Shrimp Branchinecta lynchi CNDDB; IPaC FE Not Present None Vernal Pool Tadpole
Shrimp
Lepidurus packardi IPaC FE Not Present None
Valley Elderberry
Longhorn Beetle
Desmocerus californicus
dimorphus
IPaC FE Not Present None
Monarch Danaus plexippus IPaC FC Low Quality Low
Foothill Yellow-legged
Frog
Rana boylii IPaC CE; CSSC Not Present None
California Red-legged
Frog
Rana draytonii CNDDB FT; CSSC Low Quality Low
California Tiger
Salamander
Ambystoma californiense CNDDB; IPaC FE; CE Low Quality Low Northern Legless Lizard Anniella pulchra CNDDB CSSC Low Quality Low Alameda Striped Racer Coluber lateralis euryxanthus IPaC FT; CT Not Present None California Condor Gymnogyps californianus IPaC FE; CE; CFP Not Present None White-tailed Kite Elanus leucurus CNDDB CFP Low Quality Low

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Providing Environmental Solutions for a Developing World iv Common Name Scientific Name Source(s) Legal
Status
Habitat Potential
Swainson's Hawk Buteo swainsoni CNDDB CT Low Quality Low Burrowing Owl Athene cunicularia CNDDB CSSC Medium
Quality
Moderate
San Joaquin Kit Fox Vulpes macrotis mutica IPaC FE; CT Low Quality Low American Badger Taxidea taxus CNDDB CSSC Low Quality Low Giant Garter Snake Thamnophis gigas ECCC HCP FT; CT Low Quality Low

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Providing Environmental Solutions for a Developing World i Appendix C. Site Photographs
Photo 1. An Overview of the Study Area, Facing Southeast Photo 2. Burrow on the North Side of the Study Area, Facing South

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Providing Environmental Solutions for a Developing World ii Photo 3. Potential Burrowing Owl Habitat in the Study Area, Facing East Photo 4. View of Plowed Area in the Study Area, Facing South

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Providing Environmental Solutions for a Developing World iii Photo 5. Potential Burrowing Owl Habitat, Facing west
Photo 6. Open Plowed Field in the Study Area, Facing West

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Providing Environmental Solutions for a Developing World iv Photo 7. View of Plowed Field in the Study Area along Sand Creek Road, Facing Southwest Photo 8. Northwest view of Plowed Field in the Study Area, Facing Northwest

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APPENDIX E

APPLICATION FORM AND PLANNING SURVEY REPORT

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Planning Survey Report Form, Revised July 2015
Application Form and Planning Survey Report
To Comply With and Receive Permit Coverage Under
The East Contra Costa County Habitat Conservation Plan
and Natural Community Conservation Plan
Please complete this application to apply for take authorization under the state and federal East Contra Costa County HCP/NCCP incidental take permits. The East Contra Costa County Habitat Conservancy (“Conservancy”) or local jurisdiction (City of Brentwood, City of Clayton, City of Oakley, City of Pittsburg, and Contra Costa County) may request more information in order to deem the application complete.

I. PROJECT OVERVIEW

PROJECT INFORMATION
PROJECT NAME: Brentwood Sand Creek Sports Complex
PROJECT TYPE: Residential Commercial Transportation Utility Other PROJECT DESCRIPTION (BRIEF): Project proposes to construct two or three full-size, lighted sports fields, parking lot, restrooms, storage building, picnic areas, and other amenities such as pickleball courts, outdoor exercise equipment, playground, shade elements, and more.

PROJECT ADDRESS/LOCATION: Northwest corner of Sand Creek Road and Fairview Avenue, Brentwood, Contra Costa County, California PARCEL/PROJECT SIZE (ACRES): 14.48 acres
PROJECT APN(S): 019-110-032 and 019-110-046
APPLICATION SUBMITTAL DATE: FINAL PSR DATE: (City/County/Conservancy use) LEAD PLANNER: Raney Planning & Management, Inc.

JURISDICTION: City of Brentwood City of Clayton City of Oakley City of Pittsburg Contra Costa County Participating Special Entity*

DEVELOPMENT FEE ZONE: Zone I Zone II Zone III Zone IV
See figure 9-1 of the HCP/NCCP at www.cocohcp.org for a generalized development fee zone map. Detailed development fee zone maps by jurisdiction are available from the jurisdiction.

PROJECT APPLICANT INFORMATION
APPLICANT’S NAME: Raney Planning & Management, Inc.

AUTHORIZED AGENT’S NAME AND TITLE: Rod Stinson
PHONE NO.: 9163726100 APPLICANT’S E-MAIL: [email protected] MAILING ADDRESS: Inc. 1501 Sports Drive, Suite A Sacramento, CA 95834 BIOLOGIST INFORMATION1
BIOLOGICAL/ENVIRONMENTAL FIRM:

CONTACT NAME AND TITLE:

PHONE NO.: CONTACT’S E-MAIL:

MAILING ADDRESS:
1 A USFWS/CDFW-approved biologist (project-specific) is required to conduct the surveys. Please submit biologist(s) approval request to the Conservancy. *Participating Special Entities are organizations not subject to the authority of a local jurisdiction. Such organizations may include school districts, irrigation districts, transportation agencies, local park districts, geological hazard abatement districts, or other utilities or special districts that own land or provide public services.

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Planning Survey Report Form, Revised July 2015
II. PROJECT DETAILS
Please complete and/or provide the following attachments:
1) Project Description
Attach as Attachment A: Project Description. Provide a detailed written description that concisely and completely describes the project and location. Include the following information:
• All activities proposed for the site or project, including roads utilized, construction staging areas, and the installation of underground facilities, to ensure the entire project is covered by the HCP/NCCP permit
• Proposed construction dates, including details on construction phases, if applicable • Reference a City/County application number for the project, if applicable • General Best Management Practices, if applicable
• If the project will have temporary impacts, please provide a restoration plan describing how the site will be restored to pre-project conditions, including revegetation seed mixes or plantings and timing 2) Project Vicinity Map
Provide a project vicinity map. Attach as Figure 1 in Attachment B: Figures. 3) Project Site Plans
Provide any project site plans for the project. Attach as Figure 2 in Attachment B: Figures. 4) CEQA Document
Indicate the status of CEQA documents prepared for the project. Provide additional comments below table if necessary.

Type of Document Status Date Completed
Initial Study
Notice of Preparation
Draft EIR
Final EIR
Notice of Categorical Exemption
Notice of Statutory Exemption
Other (describe)
To be provided by Raney

III. EXISTING CONDITIONS AND IMPACTS
Please complete and/or provide the following attachments:
1) Field-Verified Land Cover Map2
Attach a field-verified land cover map in Attachment B: Figures and label as Figure 3. The map should contain all land cover types present on-site overlaid on aerial/satellite imagery. Map colors for the land cover types should conform to the HCP/NCCP (see Figure 3-3: Landcover in the Inventory Area for land cover type legend).
2) Photographs of the Project Site
Attach representative photos of the project site in Attachment B: Figures and label as Figure 4. Please provide captions for each photo.
2 For PSEs and city or county public works projects, please also identify permanent and temporary impact areas by overlaying crosshatching (permanent impacts) and hatching (temporary impacts) on the land cover map.

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Planning Survey Report Form, Revised July 2015
3) Land Cover Types and Impacts and Supplemental Tables • For all terrestrial land cover types please provide calculations to the nearest hundredth of an acre (0.01).

For aquatic land cover types please provide calculations to the nearest thousandth of an acre (0.001). • Permanent Impacts are broadly defined in the ECCC HCP/NCCP to include all areas removed from an undeveloped or habitat-providing state and includes land in the same parcel or project that is not developed, graded, physically altered, or directly affected in any way but is isolated from natural areas by the covered activity. Unless such undeveloped land is dedicated to the Preserve System or is a deed-restricted creek setback, the development mitigation fee will apply (if proposed, would require Conservancy approval). • Temporary Impacts are broadly defined in the ECCC HCP/NCCP as any impact on vegetation or habitat that does not result in permanent habitat removal (i.e. vegetation can eventually recover). • If wetland (riparian woodland/scrub, wetland, or aquatic) land cover types are present on the parcel but will not be impacted please discuss in the following section 4) Jurisdictional Wetlands and Waters. Wetland impact fees will only be charged if wetland features are impacted. However, development fees will apply to the entire parcel. • Stream land cover type is considered a linear feature where impacts are calculated based on length impacted. The acreage within a stream, below Top of Bank (TOB), must be assigned to the adjacent land cover type(s). Insert area of impact to stream below TOB in parentheses after the Land Cover acreage number (e.g., Riparian Woodland/Scrub: 10 (0.036) – where 10 is the total impacted acreage including 0.036 acre, which is the acreage within stream TOB).

Complete following supplemental Stream Feature Detail table to provide information for linear feet. • Total Impacts acreage should be the total parcel acreage (development project) or project footprint acreage (rural infrastructure or utility project).

Table 1: Land Cover Types and Impacts
Land Cover Type Permanent
Impacts
Temporary
Impacts
Stream Setback Preserve System
Dedication
Grassland
Annual Grassland 14.48
Alkali Grassland
Ruderal
Shrubland
Chaparral and Scrub
Woodland
Oak Savannah
Oak Woodland
Riparian
Riparian Woodland/Scrub
Wetland
Permanent Wetland
Seasonal Wetland
Alkali Wetland
Aquatic
Aquatic (Reservoir/Open Water)
Slough/Channel
Pond
Stream (in linear feet) - - - -
Irrigated Agriculture
Pasture
Cropland
Orchard
Vineyard
Other
Nonnative woodland
Wind turbines
Developed (not counted toward Fees)
Urban
Aqueduct
Turf
Landfill
TOTAL IMPACTS 14.48
Proposed for HCP/NCCP
Dedication on the Parcel
(Requires Conservancy Approval)

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Planning Survey Report Form, Revised July 2015
Identify any uncommon vegetation and uncommon landscape features3:

Supplemental to Table 1: Uncommon Vegetation and Landscape Features Please provide details of impacts to stream features:

Stream Name:

Watershed:

Supplemental to Table 1: Stream Feature Detail5
3 These acreages are for Conservancy tracking purposes. Impacts to these uncommon vegetation and landscape features should be accounted for within the land cover types in Table 1 (e.g., x acres of purple needlegrass in this supplemental table should be accounted for within annual grassland in Table 1). 4 Insert amount/number, not acreage. Provide additional information on these features in Attachment A: Project Description. 5 Use more than 1 row as necessary to describe impacts to streams on site. 6 See glossary (Appendix A) for definition of stream type and order. 7 Stream length is measured along stream centerline, based on length of impact to any part of the stream channel, TOB to TOB.

Permanent
Impacts
Temporary
Impacts
Uncommon Grassland Alliances
Purple Needlegrass Grassland
Blue Wildrye Grassland
Creeping Ryegrass Grassland
Wildflower Fields
Squirreltail Grassland
One-sided Bluegrass Grassland
Serpentine Bunchgrass Grassland
Saltgrass Grassland
Alkali Sacaton Bunchgrass Grassland
Other
Uncommon Landscape Features
Rock Outcrops
Caves
Springs and seeps
Scalds
Sand Deposits
Mines4
Buildings (bat roosts)3
Potential nest sites (trees or cliffs)3
Stream Width Stream Type6 Permanent Impacts
(linear feet)7
Temporary Impacts
(linear feet)7
≤ 25 feet wide
> 25 feet wide
Perennial
Intermittent
Ephemeral, 3rd or higher order
Ephemeral, 1st or 2nd order

≤ 25 feet wide
> 25 feet wide
Perennial
Intermittent
Ephemeral, 3rd or higher order
Ephemeral, 1st or 2nd order

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Planning Survey Report Form, Revised July 2015
4) Summary of Land Cover Types
Please provide a written summary of descriptions for land cover types found on site including characteristic vegetation.

The entire Study Area (14.48 acres) is classified as disturbed habitat consisting of plowed fields. The vegetation community within the Study Area is comprised of Mediterranean grasses and forbs including, but not limited to, Foxtail barley (Hordeum murinum), Italian rye grass (Festuca perennis), Italian thistle (Carduus tenuiflorus), and Wild radish (Raphanus raphanistrum). No sensitive vegetation communities were mapped by the CNDDB within the Regional Study Area. Figure 9-1 of the HCP/NCCP classified the land as grassland. It should be noted, however, that recent plowing events have taken place (see photographs attached at the end of this application). 5) Jurisdictional Wetlands and Waters
If wetlands and waters are present on the project site, project proponents must conduct a delineation of jurisdictional wetlands and waters. Jurisdictional wetlands and waters are defined on pages 1-18 and 1-19 of the ECCC HCP/NCCP as the following land cover types: permanent wetland, seasonal wetland, alkali wetland, aquatic, pond, slough/channel, and stream. It should be noted that these features differ for federal and state jurisdictions. If you have identified any of these land cover types in Table 1, complete the section below. a) Attach the wetland delineation report as Attachment E: Wetland Delineation. If a wetland delineation has not been completed, please explain below in section 4c. b) Please check the following permits the project may require. Please submit copies of these permits to the Conservancy prior to the start of construction:

CWA Section 404 Permit8 CWA Section 401 Water Quality Certification Waste Discharge Requirements Lake and Streambed Alteration Agreement c) Provide any additional information on impacts to jurisdictional wetland and waters below, including status of the permit(s):

No aquatic resources are within the Study Area.
8 The USACE Sacramento District issued a Regional General Permit 1 (RGP) related to ECCC HCP/NCCP covered activities. The RGP is designed to streamline wetland permitting in the entire ECCC HCP/NCCP Plan Area by coordinating the avoidance, minimization, and mitigation measures in the Plan with the Corps’ wetland permitting requirement. Applicants seeking authorization under this RGP shall notify the Corps in accordance with RGP general condition number 18 (Notification).

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Planning Survey Report Form, Revised July 2015
6) Species-Specific Planning Survey Requirements
Based on the land cover types found on-site and identified in Table 1, check the applicable boxes in Table 2a.

Table 2a. Species –Specific Planning Survey Requirements Land Cover Type
in Project Area Required Survey Species Habitat Element in Project Area Planning Survey Requirement9 Info in HCP Grasslands,
oak savannah,
agriculture, or
ruderal
San Joaquin kit fox Assumed if within modeled range
of species
If within modeled range of species,
identify and map potential breeding or
denning habitat within the project site
and a 250-ft radius around the project
footprint.
pp. 6-37
to 6-38
Western burrowing
owl
Assumed Identify and map potential breeding
habitat within the project site and a
500-ft radius around the project
footprint. Please note the HCP
requires buffers for occupied burrows.

Surveys may need to encompass an
area larger than the project footprint.
pp. 6-39
to 6-41
Aquatic
(ponds,
wetlands,
streams, sloughs,
channels, and
marshes)
Giant garter snake Aquatic habitat accessible from
the San Joaquin River
Identify and map potential habitat. pp. 6-43
to 6-45
California tiger
salamander
Ponds and wetlands
Vernal pools
Reservoirs
Small lakes
Identify and map potential breeding
habitat. Document habitat quality and
features. Provide the Conservancy
with photo-documentation and report.
pp. 6-45
California
red-legged frog
Slow-moving streams, ponds and
wetlands
Identify and map potential breeding
habitat. Document habitat quality and
features. Provide the Conservancy
with photo-documentation and report.
p. 6-46
Covered shrimp Seasonal wetlands
Vernal pools
Sandstone rock outcrops
Sandstone depressions
Identify and map potential habitat.

Please note the HCP requires a 50 foot
non-disturbance buffer from seasonal
wetlands that may be occupied by
covered shrimp. Surveys may need to
encompass an area larger than the
project footprint.
pp. 6-46
to 6-48
Any Townsend’s big-eared
bat
Rock formations with caves
Mines
Abandoned buildings outside
urban area
Map and document potential breeding
or roosting habitat.
pp. 6-36
to 6-37
Swainson’s hawk Potential nest sites within 1,000
feet of project
Inspect large trees for presence of nest
sites. Document and map.
pp. 6-41
to 6-43
Golden Eagle Potential nest sites with ½ mile of
project
Inspect large trees for presence of nest
sites. Document and map.
pp. 6-38
to 6-39
Surveys for all covered species must be conducted by a qualified biologist (USFWS/CDFW project-specific approved). Please submit biologist approval request to the East Contra Costa County Habitat Conservancy.

Surveys for all covered species must be conducted according to the respective USFWS or CDFW survey protocols, as identified in Chapter

6.4.3 in the HCP/NCCP.
7) Planning Survey Species Habitat Maps
Provide Planning Survey Species Habitat Maps as required in Table 2a, attach as Figure 5 in Attachment B:

Figures.
9 The planning survey requirements in this table are not comprehensive. Please refer to Chapter 6.4.3 in the ECCC HCP/NCCP for more detail.

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Planning Survey Report Form, Revised July 2015
8) Results of Species Specific Surveys
Provide a written summary describing the results of the planning surveys. Please discuss the location, quantity, and quality of suitable habitat for specified covered wildlife species on the project site.

Species specific surveys not conducted. Desktop analysis of the literature and numerous resource databases were conducted as well as a field survey on July 25, 2023 by Bargas Environmental Consulting biologists Dr. Dustin Baumbach and Jinnah Benn. Desktop review included tools such as USFWS’s National Wetlands Inventory, USGS’s National Hydrography Dataset, US Department of Agriculture’s National Resource Conservation Service Web Soil Survey, and Google Earth Pro aerial maps. Species and habitat occurrences within the Regional Study Area were queried from USFWS’s Information for Planning and Consultation portal (IPaC), CDFW’s California Natural Diversity Database (CNDDB), and CNPS’s Inventory of Rare and Endangered Plants. The Regional Study Area is defined as the Project site and a 3-mile buffer. The Regional Study Area was used as the basis for determining special-status biological resource records for consideration of the Biological Resource Assessment.

Habitat types were documented, and plant and wildlife species were recorded. Areas that were determined to be potential habitat for special-status species were further assessed for suitability. Habitat suitability was analyzed in situ during the site field survey and via satellite imagery during desktop analysis.

Burrowing owls can utilize disturbed open fields for sheltering and nesting. The Study Area is a disturbed open field with at least one burrow and low tufts of vegetation considered suitable for this species and was determined to have a moderate potential for occurrence.

California Red-legged Frog favors calm flowing water with vegetation cover, both of which are not present in the Study Area. California Tiger Salamander can utilize open fields during the non-breeding season. However, recent plowing of the Study Area combined with the lack of vegetation presents low quality habitat. Both species were determined to have to have low potential for occurrence.

San Joaquin Kit Fox needs a home range of about 1,000 acres in addition to soft sandy soils for dens and neither of these conditions are present in the Study Area. The Study Area could be accessed by fox via the adjacent creek and used for foraging as part of a greater home range however the Study Area is not suitable for kit fox dens.

Swainson’s Hawk could use the Study Area for transit or foraging. However, the Study Area is unsuitable for nesting as there are not structures to nest on, therefore biologists determined there was low potential for Swainson’s Hawk to forage on the project site. Suitable nesting trees for Swainson’s Hawk do occur within 1,000 feet of the Study Area and Suitable nesting trees for Golden Eagle also occur within 0.5 mile of the Study Area.

Desktop review did not find any occurrences or evidence of Golden Eagle, Covered Shrimp, Giant garter snake, or Townsend’s big-eared bat in or around the Regional Study Area. 9) Covered and No-Take Plants
Please check the applicable boxes in Table 2b based on the land cover types found in the project area. If suitable land cover types are present on site, surveys must be conducted using approved CDFW/USFWS methods during the appropriate season for identification of covered and no-take species (see page 6-9 of the ECCC HCP/NCCP). Reference populations of covered and no-take plants should be visited, where possible, prior to conducting surveys to confirm that the plant species is visible and detectable at the time surveys are conducted. In order to complete all the necessary covered and no-take plant surveys, spring, summer, and fall surveys may be required.

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Table 2b. Covered and No-Take Plant Species
Plant Species
Covered
(C) or NoTake (N)Associated Land
Cover Type
Typical Habitat or Physical Conditions, if
Known
Typical Blooming
Period
Suitable Land
Cover Type
Present
Adobe navarretia
(Navarretia nigelliformis ssp.
radians)
a
C Annual Grassland Generally found on clay barrens in
Annual Grassland b
Apr–Jun Yes
No
Alkali milkvetch
(Astragalus tener ssp. tener)
N Alkali grassland
Alkali wetland
Annual grassland
Seasonal wetland
Generally found in vernally moist habitat
in soils with a slight to strongly elevated
pH
Mar–Jun Yes
No
Big tarplant
(Blepharizonia plumosa)
C Annual grassland Elevation below 1500 feet d most often on Altamont Series or Complex soils
Jul–Oct Yes
No
Brewer’s dwarf flax
(Hesperolinon breweri)
C Annual grassland
Chaparral and scrub
Oak savanna
Oak woodland
Generally, restricted to grassland areas
within a 500+ buffer from oak woodland
and/or chaparral/scrub d
May–Jul Yes
No
Brittlescale
(Atriplex depressa)
C Alkali grassland
Alkali wetland
Restricted to soils of the Pescadero or
Solano soil series; generally found in
southeastern region of plan area d
May–Oct Yes
No
Caper-fruited tropidocarpum
(Tropidocarpum capparideum)
N Alkali grassland Mar–Apr Yes
No
Contra Costa goldfields
(Lasthenia conjugens)
N Alkali grassland
Alkali wetland
Annual grassland
Seasonal wetland
Generally found in vernal pools Mar–Jun Yes
No
Diablo Helianthella
(Helianthella castanea)
C Chaparral and scrub
Oak savanna
Oak woodland
Elevations generally above 650 feet d Mar–Jun Yes
No
Diamond-petaled poppy
(Eschscholzia rhombipetala)
N Annual grassland Mar–Apr Yes
No
Large-flowered fiddleneck
(Amsinckia grandiflora)
N Annual grassland Generally on clay soil Apr–May Yes
No
Mount Diablo buckwheat
(Eriogonum truncatum)
N Annual grassland
Chaparral and scrub
Ecotone of grassland and chaparral/scrub Apr–Sep Yes
No
Mount Diablo fairy-lantern
(Calochortus pulchellus)
C Annual grassland
Chaparral and scrub
Oak savanna
Oak woodland
Elevations generally between 650 and
2,600d
Apr–Jun Yes
No
Mount Diablo Manzanita
(Arctostaphylos auriculata)
C Chaparral and scrub Elevations generally between 700 and 1,860 feet; restricted to the eastern and
northern flanks of Mt. Diablo d and the
vicinity of Black Diamond Mines
Jan–Mar Yes
No
Recurved larkspur
(Delphinium recurvatum)
C Alkali grassland
Alkali wetland
Mar–Jun Yes
No
Round-leaved filaree
(California macrophylla)
c
C Annual grassland Mar–May Yes
No
San Joaquin spearscale
(Extriplex joaquiniana)
e
C Alkali grassland
Alkali wetland
Apr–Oct Yes
No
Showy madia
(Madia radiata)
C Annual grassland
Oak savanna
Oak woodland
Primarily occupies open grassland or
grassland on edge of oak woodland
Mar–May Yes
No
a The species Navarretia nigelliformis subsp. nigelliformis is no longer considered to occur within Contra Costa County based on specimen annotations at the UC and Jepson Herbaria at the University of California Berkeley as well as the opinions of experts in the genus. This taxon is now recognized as Navarretia nigelliformis subsp. radians. Any subspecies of Navarretia nigelliformis encountered as a part of botanical surveys in support of a PSR should be considered as covered under this HCP/NCCP. b Habitat for the Navarretia nigelliformis subspecies that occurs within the inventory are is inaccurately described in the HCP/NCCP as vernal pools. The entity within the Inventory generally occupies clay barrens within Annual Grassland habitat, which is an upland habitat type. c From California Native Plant Society. 2007. Inventory of Rare and Endangered Plants (online edition, v7-07d). Sacramento, CA. Species may be identifiable outside of the typical blooming period; a professional botanist shall determine if a covered or no take plant occurs on the project site. Reference population of covered and no-take plants should be visited, where possible, prior to conducting surveys to confirm that the plant is visible and detectable at the time surveys are conducted. d See Species Profiles in Appendix D of the Final HCP/NCCP. Reference populations of covered and no-take plants should be visited, where possible, prior to conducting surveys to confirm that the plant species is visible and detectable at the time surveys are conducted. e In the recent update to the Jepson eflora (JFP 2013) Atriplex joaquinana has been circumscribed and segregated into a new genus called Extriplex based on the work of Elizabeth Zacharias and Bruce Baldwin (2010). The etymology of the genus Extriplex means, “beyond or outside Atriplex”.

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Planning Survey Report Form, Revised July 2015
10) Results of Covered and No-Take Plant Species
Provide a written summary describing the results of the planning surveys conducted as required in Table 2b.

Describe the methods used to survey the site for all covered and no-take plants, including the dates and times of all surveys conducted (see Tables 3-8 and 6-5 of the ECCC HCP/NCCP for covered and no-take plants), including reference populations visited prior to conducting surveys.

If any covered or no-take plant species were found, include the following information in the results summary:
• Description and number of occurrences and their rough population size. • Description of the “health” of each occurrence, as defined on pages 5-49 and 5-50 of the HCP/NCCP. • A map of all the occurrences.
• Justification of surveying time window, if outside of the plant’s blooming period. • The CNDDB form(s) submitted to CDFW (if this is a new occurrence). • A description of the anticipated impacts that the covered activity will have on the occurrence and how the project will avoid impacts to all covered and no-take plant species. If impacts to covered plant species cannot be avoided and plants will be removed by covered activity, the Conservancy must be notified and has the option to salvage the covered plants. All projects must demonstrate avoidance of all six no-take plants (see table 6-5 of the HCP/NCCP).

Desktop review determined that 10 plant taxa with special status had been documented as occurring within the Regional Study Area, four of which were included on the Covered and No-Take Plant Species list. These included Big tarplant (Blepharizonia plumosa), Brittlescale (Atriplex depressa), Caper-fruited tropidocarpum (Tropidocarpum capparideum), and San Joaquin spearscale (Etriplex joaquiniana). Of these and the Covered and No-Take Plant Species, all species have no potential for occurrence in the Study Area.

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Planning Survey Report Form, Revised July 2015
IV. SPECIES-SPECIFIC AVOIDANCE AND MINIMIZATION REQUIREMENTS Please complete and/or provide the following attachments:
1) Species-Specific Avoidance and Minimization for Selected Covered Wildlife Complete the following table and check the applicable box for covered species determined by the planning surveys.

Table 3. Summary of Applicable Preconstruction Surveys, Avoidance and Minimization, and Construction Monitoring Requirements10
Species Preconstruction Survey
Requirements
Avoidance and Minimization
Requirements Construction Monitoring Required Info in HCP San
Joaquin
kit fox
• On project footprint and 250-ft
radius, map all dens (>5 in.
diameter) and determine status
• Provide written survey results
to USFWS within 5 working
days after surveying
• Monitor dens
• Destroy unoccupied dens
• Discourage use of occupied (nonnatal) dens
• Establish exclusion zones ( >50 ft
for potential dens, and >100 ft for
known dens)
• Notify USFWS of occupied natal
dens
pp. 6-37
to 6-38
Western
burrowing
owl
• On project footprint and 500-ft
radius, identify and map all
owls and burrows, and
determine status
• Document use of habitat (e.g.
breeding, foraging)
• Avoid occupied nests during
breeding season (Feb-Sep)
• Avoid occupied burrows during
nonbreeding season (Sep – Feb)
• Install one-way doors in occupied
burrow (if avoidance not possible)
• Monitor burrows with doors
installed
• Establish buffer zones (250 ft
around nests)
• Establish buffer zones (160 ft
around burrows)
pp. 6-39
to 6-41
Giant
garter
snake
• Delineate aquatic habitat up to
200 ft from water’s edge on
each side
• Document any occurrences
• Limit construction to Oct-May
• Dewater habitat April 15 – Sep 30
prior to construction
• Minimize clearing for construction
• Delineate 200 ft buffer around
potential habitat near construction
• Provide field report on monitoring
efforts
• Stop construction activities if
snake is encountered; allow snake
to passively relocate
• Remove temporary fill or debris
from construction site
• Mandatory training for
construction personnel
pp. 6-43
to 6-45
California
tiger
salamander
• Provide written notification to
USFWS and CDFW regarding
timing of construction and
likelihood of occurrence on site
• Allow agency staff to translocate
species, if requested
• None p. 6-45
California
red-legged
frog
• Provide written notification to
USFWS and CDFW regarding
timing of construction and
likelihood of occurrence on site
• Allow agency staff to translocate
species, if requested
• None p. 6-46
Covered
shrimp
• Establish presence/absence
• Document and evaluate use of
all habitat features (e.g. vernal
pools, rock outcrops)
• Establish buffer near construction
activities
• Prohibit incompatible activities
• Establish buffer around outer edge
of all hydric vegetation associated
with habitat (50 ft or immediate
watershed, whichever is larger)
• Mandatory training for
construction personnel
pp. 6-46
to 6-48
Townsend’s
big-eared
bat
• Establish presence/absence
• Determine if potential sites
were recently occupied (guano)
• Seal hibernacula before Nov
• Seal nursery sites before April
• Delay construction near occupied
sites until hibernation or nursery
seasons are over
• None pp. 6-36
to 6-37
Swainson’s
hawk
• Determine whether potential
nests are occupied
• No construction within 1,000 ft of
occupied nests within breeding
season (March 15 - Sep 15)
• If necessary, remove active nest
tree after nesting season to
prevent occupancy in second year.
• Establish 1,000 ft buffer around
active nest and monitor
compliance (no activity within
established buffer)
pp. 6-41
to 6-43
Golden
Eagle
• Establish presence/absence of
nesting eagles
• No construction within ½ mile near
active nests (most activity late Jan
– Aug)
• Establish ½ mile buffer around
active nest and monitor
compliance with buffer
pp. 6-38
to 6-39
10 The requirements in this table are not comprehensive; they are detailed in the next section on the following page.

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2) Required Preconstruction Surveys, Avoidance and Minimization, and Construction Monitoring All preconstruction surveys shall be conducted in accordance with the requirements set forth in Section 6.4.3, Species-Level Measures, and Table 6-1 of the ECCC HCP/NCCP. Detailed descriptions of preconstruction surveys, avoidance and minimization, and construction monitoring applicable to each of the wildlife species in Table 3 are located below. Please remove the species-specific measures that do not apply to your project (highlight entire section and delete).

WESTERN BURROWING OWL
Preconstruction Surveys
Prior to any ground disturbance related to covered activities, a USFWS/CDFW- approved biologist will conduct a preconstruction survey in areas identified in the planning surveys as having potential burrowing owl habitat. The surveys will establish the presence or absence of western burrowing owl and/or habitat features and evaluate use by owls in accordance with CDFW survey guidelines (California Department of Fish and Game 1995).

On the parcel where the activity is proposed, the biologist will survey the proposed disturbance footprint and a 500- foot radius from the perimeter of the proposed footprint to identify burrows and owls. Adjacent parcels under different land ownership will not be surveyed. Surveys should take place near sunrise or sunset in accordance with CDFW guidelines. All burrows or burrowing owls will be identified and mapped. Surveys will take place no more than 30 days prior to construction. During the breeding season (February 1– August 31), surveys will document whether burrowing owls are nesting in or directly adjacent to disturbance areas. During the nonbreeding season (September 1–January 31), surveys will document whether burrowing owls are using habitat in or directly adjacent to any disturbance area. Survey results will be valid only for the season (breeding or nonbreeding) during which the survey is conducted.

Avoidance and Minimization and Construction Monitoring
This measure incorporates avoidance and minimization guidelines from CDFW’s Staff Report on Burrowing Owl Mitigation (California Department of Fish and Game 1995).

If burrowing owls are found during the breeding season (February 1 – August 31), the project proponent will avoid all nest sites that could be disturbed by project construction during the remainder of the breeding season or while the nest is occupied by adults or young. Avoidance will include establishment of a non-disturbance buffer zone (described below). Construction may occur during the breeding season if a qualified biologist monitors the nest and determines that the birds have not begun egg-laying and incubation or that the juveniles from the occupied burrows have fledged. During the nonbreeding season (September 1 – January 31), the project proponent should avoid the owls and the burrows they are using, if possible. Avoidance will include the establishment of a buffer zone (described below).

During the breeding season, buffer zones of at least 250 feet in which no construction activities can occur will be established around each occupied burrow (nest site). Buffer zones of 160 feet will be established around each burrow being used during the nonbreeding season. The buffers will be delineated by highly visible, temporary construction fencing.

If occupied burrows for burrowing owls are not avoided, passive relocation will be implemented. Owls should be excluded from burrows in the immediate impact zone and within a 160-foot buffer zone by installing one-way doors in burrow entrances. These doors should be in place for 48 hours prior to excavation. The project area should be monitored daily for 1 week to confirm that the owl has abandoned the burrow. Whenever possible, burrows should be excavated using hand tools and refilled to prevent reoccupation (California Department of Fish and Game 1995).

Plastic tubing or a similar structure should be inserted in the tunnels during excavation to maintain an escape route for any owls inside the burrow.

SWAINSON’S HAWK
Preconstruction Survey

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Prior to any ground disturbance related to covered activities that occurs during the nesting season (March 15– September 15), a qualified biologist will conduct a preconstruction survey no more than 1 month prior to construction to establish whether Swainson’s hawk nests within 1,000 feet of the project site are occupied. If potentially occupied nests within 1,000 feet are off the project site, then their occupancy will be determined by observation from public roads or by observations of Swainson’s hawk activity (e.g., foraging) near the project site. If nests are occupied, minimization measures and construction monitoring are required (see below).

Avoidance and Minimization and Construction Monitoring
During the nesting season (March 15–September 15), covered activities within 1,000 feet of occupied nests or nests under construction will be prohibited to prevent nest abandonment. If site-specific conditions or the nature of the covered activity (e.g., steep topography, dense vegetation, limited activities) indicate that a smaller buffer could be used, the Implementing Entity will coordinate with CDFW/USFWS to determine the appropriate buffer size.

If young fledge prior to September 15, covered activities can proceed normally. If the active nest site is shielded from view and noise from the project site by other development, topography, or other features, the project applicant can apply to the Implementing Entity for a waiver of this avoidance measure. Any waiver must also be approved by USFWS and CDFW. While the nest is occupied, activities outside the buffer can take place.

All active nest trees will be preserved on site, if feasible. Nest trees, including non-native trees, lost to covered activities will be mitigated by the project proponent according to the requirements below.

Mitigation for Loss of Nest Trees
The loss of non-riparian Swainson’s hawk nest trees will be mitigated by the project proponent by:
• If feasible on-site, planting 15 saplings for every tree lost with the objective of having at least 5 mature trees established for every tree lost according to the requirements listed below.

AND either
1) Pay the Implementing Entity an additional fee to purchase, plant, maintain, and monitor 15 saplings on the HCP/NCCP Preserve System for every tree lost according to the requirements listed below, OR 2) The project proponent will plant, maintain, and monitor 15 saplings for every tree lost at a site to be approved by the Implementing Entity (e.g., within an HCP/NCCP Preserve or existing open space linked to HCP/NCCP preserves), according to the requirements listed below.

The following requirements will be met for all planting options:
• Tree survival shall be monitored at least annually for 5 years, then every other year until year 12. All trees lost during the first 5 years will be replaced. Success will be reached at the end of 12 years if at least 5 trees per tree lost survive without supplemental irrigation or protection from herbivory. Trees must also survive for at least three years without irrigation.
• Irrigation and fencing to protect from deer and other herbivores may be needed for the first several years to ensure maximum tree survival.
• Native trees suitable for this site should be planted. When site conditions permit, a variety of native trees will be planted for each tree lost to provide trees with different growth rates, maturation, and life span, and to provide a variety of tree canopy structures for Swainson’s hawk. This variety will help to ensure that nest trees will be available in the short term (5-10 years for cottonwoods and willows) and in the long term (e.g., Valley oak, sycamore). This will also minimize the temporal loss of nest trees. • Riparian woodland restoration conducted as a result of covered activities (i.e., loss of riparian woodland) can be used to offset the nest tree planting requirement above, if the nest trees are riparian species. • Whenever feasible and when site conditions permit, trees should be planted in clumps together or with existing trees to provide larger areas of suitable nesting habitat and to create a natural buffer between nest trees and adjacent development (if plantings occur on the development site). • Whenever feasible, plantings on the site should occur closest to suitable foraging habitat outside the UDA. • Trees planted in the HCP/NCCP preserves or other approved offsite location will occur within the known range of Swainson’s hawk in the inventory area and as close as possible to high-quality foraging habitat.

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GOLDEN EAGLE
Preconstruction Survey
Prior to implementation of covered activities, a qualified biologist will conduct a preconstruction survey to establish whether nests of golden eagles are occupied (see Section 6.3.1, Planning Surveys). If nests are occupied, minimization requirements and construction monitoring will be required.

Avoidance and Minimization
Covered activities will be prohibited within 0.5 mile of active nests. Nests can be built and active at almost any time of the year, although mating and egg incubation occurs late January through August, with peak activity in March through July. If site-specific conditions or the nature of the covered activity (e.g., steep topography, dense vegetation, limited activities) indicate that a smaller buffer could be appropriate or that a larger buffer should be implemented, the Implementing Entity will coordinate with CDFW/USFWS to determine the appropriate buffer size.

Construction Monitoring
Construction monitoring will focus on ensuring that no covered activities occur within the buffer zone established around an active nest. Although no known golden eagle nest sites occur within or near the ULL, covered activities inside and outside of the Preserve System have the potential to disturb golden eagle nest sites. Construction monitoring will ensure that direct effects to golden eagles are minimized.

GIANT GARTER SNAKE
Preconstruction Surveys
Prior to any ground disturbance related to covered activities, a USFWS/CDFW– approved biologist will conduct a preconstruction survey in areas identified in the planning surveys as having suitable garter snake habitat and 200 feet of adjacent uplands, measured from the outer edge of each bank. The surveys will delineate suitable habitat and document any sightings of giant garter snake.

Avoidance and Minimization Requirements
To the maximum extent practicable, impacts on giant garter snake habitat as a result of covered activities will be avoided. If feasible, in areas near construction activities, a buffer of 200 feet from suitable habitat will be delineated within which vegetation disturbance or use of heavy equipment is prohibited.

If impacts on giant garter snake habitat as a result of covered activities are not avoided, the following measures will be implemented. These measures are based on USFWS’s Standard Avoidance and Minimization Measures during Construction Activities in Giant Garter Snake Habitat (U.S. Fish and Wildlife Service 1999). • Limit construction activity that disturbs habitat to the period between May 1 and September 30. This is the active period for giant garter snake, and direct mortality is minimized because snakes are more likely to independently move away from disturbed area. If activities are necessary in giant garter snake habitat between October 1 and April 30, the USFWS Sacramento Field Office will be contacted to determine if additional measures beyond those described below are necessary to minimize and avoid take. • In areas where construction is to take place, dewater all irrigation ditches, canals or other aquatic habitat between April 15 and September 30 to remove habitat of garter snakes. Dewatered areas must remain dry, with no puddled water remaining, for at least 15 consecutive days prior to the excavation or filling of that habitat. If a site cannot be completely dewatered, netting and salvage of prey items may be necessary.

Construction Monitoring
If suitable habitat for giant garter snake cannot be avoided between October 1 and April 30 the USFWS Sacramento Field Office will be contacted to determine if additional measures beyond those described below are necessary, and the following actions will be performed. A USFWS-approved biologist will conduct a construction survey no more than 24 hours before construction in suitable habitat and will be on site during construction activities in potential

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aquatic and upland habitat to ensure that individuals of giant garter snake encountered during construction will be avoided. The biologist will provide USFWS with a field report form documenting the monitoring efforts within 24 hours of commencement of construction activities. The monitor will be available thereafter. If a snake is encountered during construction activities, the monitor will have the authority to stop construction activities until appropriate corrective measures have been completed or it is determined that the snake will not be harmed. Giant garter snakes encountered during construction activities should be allowed to move away from the construction area on their own. Only personnel with a USFWS recovery permit pursuant to Section 10(a)(1)(A) of the ESA will have the authority to capture and/or relocate giant garter snakes that are encountered in the construction area. The project area will be reinspected whenever a lapse in construction activity of 2 weeks or more has occurred.

To ensure that construction equipment and personnel do not affect nearby aquatic habitat for giant garter snake outside construction areas, silt fencing will be erected to clearly define the aquatic habitat to be avoided; restrict working areas, spoils, and equipment storage and other project activities to areas outside of aquatic or wetland habitat; and maintain water quality and limit construction runoff into wetland areas through the use of fiber bales, filter fences, vegetation buffer strips, or other appropriate methods.

Fill or construction debris may be used by giant garter snakes as over-wintering sites. Therefore, upon completion of construction activities, any temporary fill or construction debris must be removed from the site.

Construction personnel will be trained to avoid harming giant garter snakes. A qualified biologist approved by USFWS will inform all construction personnel about the life history of giant garter snakes; the importance of irrigation canals, marshes/wetlands, and seasonally flooded areas such as rice fields to giant garter snakes; and the terms and conditions of the Plan related to avoiding and minimizing impacts on giant garter snake. 3) Construction Monitoring Plan
Before implementing a covered activity, the applicant will develop and submit a construction monitoring plan to the planning department of the local land use jurisdiction and the East Contra Costa County Habitat Conservancy for review and approval. Elements of a brief construction monitoring plan will include the following:
• Results of planning and preconstruction surveys.11
• Description of avoidance and minimization measures to be implemented, including a description of project-specific refinements to the measures or additional measures not included in the HCP/NCCP. • Description of monitoring activities, including monitoring frequency and duration, and specific activities to be monitored.
• Description of the onsite authority of the construction monitor to modify implementation of the activity.

Check box to acknowledge this requirement.
11 If the preconstruction surveys do not trigger construction monitoring, results of preconstruction surveys should still be submitted to the local jurisdiction and the East Contra Costa County Habitat Conservancy.

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Planning Survey Report Form, Revised July 2015
V. SPECIFIC CONDITIONS ON COVERED ACTIVITIES
1) Check off the HCP conservation measures that apply to the project.

APPLIES TO ALL PROJECTS
Conservation Measure 1.11. Avoid Direct Impacts on Extremely Rare Plants, Fully Protected Wildlife Species, or Migratory Birds. This conservation measure applies to all projects. All projects will avoid all impacts on extremely rare plants and fully protected species listed in Table 6-5 of the ECCC HCP/NCCP. See HCP pp. 6-23 to 6-25, and Table 6-5.

APPLIES TO PROJECTS THAT IMPACT COVERED PLANT SPECIES
Conservation Measure 3.10. Plant Salvage when Impacts are Unavoidable. This condition applies to projects that cannot avoid impacts on covered plants and help protect covered plants by prescribing salvage whenever avoidance of impacts is not feasible. Project proponents wishing to remove populations of covered plants must notify the Conservancy of their construction schedule to allow the Conservancy the option of salvaging the populations. See HCP pp. 6-48 to 6-50.

APPLIES TO PROJECTS THAT INCLUDE ARE ADJACENT TO STREAMS, PONDS, OR WETLANDS Conservation Measure 2.12. Wetland, Pond, and Stream Avoidance and Minimization. All projects will implement measures described in the HCP to avoid and minimize impacts on wetlands, ponds, streams, and riparian woodland/scrub. See HCP pp. 6-33 to 6-35.

APPLIES TO NEW DEVELOPMENT PROJECTS
Conservation Measure 1.10. Maintain Hydrologic Conditions and Minimize Erosion. All new development must avoid or minimize direct and indirect impacts on local hydrological conditions and erosion by incorporating the applicable Provision C.3 Amendments of the Contra Costa County Clean Water Program’s (CCCCWP’s) amended NPDES Permit (order no. R2-2003-0022; permit no. CAS002912). The overall goal of this measure is to ensure that new development covered under the HCP has no or minimal adverse effects on downstream fisheries to avoid take of fish listed under ESA or CESA. See HCP pp. 6-21 to 6-22.

APPLIES TO NEW DEVELOPMENT PROJECTS THAT INCLUDE OR ARE ADJACENT TO STREAMS, PONDS, OR WETLANDS Conservation Measure 1.7. Establish Stream Setbacks. A stream setback will be applied to all development projects covered by the HCP according to the stream types listed in Table 6-2 of the HCP. See HCP pp. 6-15 to 6-18 and Table 6-2.

APPLIES TO NEW DEVELOPMENT PROJECTS ADJACENT TO EXISTING PUBLIC OPEN SPACE, HCP PRESERVES, OR LIKELY HCP ACQUISITION SITES Conservation Measure 1.6. Minimize Development Footprint Adjacent to Open Space. Project applicants are encouraged to minimize their development footprint and set aside portions of their land to contribute to the HCP Preserve System. Land set aside that contributes to the HCP biological goals and objectives may be credited against development fees. See HCP pages 6-14 to 6-15.

Conservation Measure 1.8. Establish Fuel Management Buffer to Protect Preserves and Property. Buffer zones will provide a buffer between development and wildlands that allows adequate fuel management to minimize the risk of wildlife damage to property or to the preserve. The minimum buffer zone for new development is 100 feet. See HCP pages 6-18 to 6-19.

Conservation Measure 1.9. Incorporate Urban-Wildlife Interface Design Elements. These projects will incorporate design elements at the urban-wildlife interface to minimize the indirect impacts of development on the adjacent preserve. See HCP pp. 6-20 to 6-21.

APPLIES TO ROAD MAINTENANCE PROJECTS OUTSIDE THE UDA
Conservation Measure 1.12. Implement Best Management Practices for Rural Road Maintenance. Road maintenance activities have the potential to affect covered species by introducing sediment and other pollutants into downstream waterways, spreading invasive weeds, and disturbing breeding wildlife. In order to avoid and minimize these impacts, BMPs described in the HCP will be used where appropriate and feasible. See HCP pp. 6-25 to 6-26.

APPLIES TO NEW ROADS OR ROAD IMPROVEMENTS OUTSIDE THE UDA Conservation Measure 1.14. Design Requirements for Covered Roads Outside the Urban Development Area (UDA). New roads or road improvements outside the UDA have impacts on many covered species far beyond the direct impacts of their project footprints. To minimize the impacts of new, expanded, and improved roads in agricultural and natural areas of the inventory area, road and bridge construction projects will adopt siting, design, and construction requirements described in the HCP and listed in Table 6-6. See HCP pp. 6-27 to 6-33 and Table 6-6.

APPLIES TO FLOOD CONTROL MAINTENANCE ACTIVITIES
Conservation Measure 1.13. Implement Best Management Practices for Flood Control Facility Maintenance. Flood control maintenance activities have the potential to affect covered species by introducing sediment and other pollutants into downstream waterways and disturbing breeding wildlife. In order to avoid and minimize these impacts, BMPs described in the HCP will be used where appropriate and feasible. See HCP pp. 6-26 to 6-27.

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Planning Survey Report Form, Revised July 2015
2) For all checked conservation measures, describe how the project will comply with each measure.

Attach as Attachment C: Project Compliance to HCP Conditions.

VI. MITIGATION MEASURES
1) Mitigation Fee Calculator(s)
Complete and attach the fee calculator (use permanent and/or temporary impact fee calculator as appropriate), and attach as Attachment D: Fee Calculator(s). 2) Briefly describe the amount of fees to be paid and when applicant plans to submit payment.

The 2023 Development Fee is $19,871.91/acre in Fee Zone 1. With the project at 14.48 acres, the fee comes out to $287,745.26. The applicant will pay the fee to the City of Brentwood at the time the first construction permits are issued.

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ATTACHMENT A: PROJECT DESCRIPTION

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ATTACHMENT B: FIGURES

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Figure 2: Site Plans

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Figure 4: Site Photos
Photo 1. An Overview of the Study Area, Facing Southeast Photo 2. Burrow on the North Side of the Study Area, Facing South

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Photo 3. Potential Burrowing Owl Habitat in the Study Area, Facing East Photo 4. View of Plowed Area in the Study Area, Facing South

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Photo 5. Potential Burrowing Owl Habitat, Facing west
Photo 6. Open Plowed Field in the Study Area, Facing West

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Photo 7. View of Plowed Field in the Study Area along Sand Creek Road, Facing Southwest Photo 8. Northwest view of Plowed Field in the Study Area, Facing Northwest

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ATTACHMENT C: PROJECT COMPLIANCE TO HCP CONDITIONS

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Project Compliance to HCP Conditions

1. Conservation Measure 1.11. Avoid Direct Impacts on Extremely Rare Plants, Fully Protected Wildlife Species, or Migratory Birds. This conservation measure applies to all projects. All projects will avoid all impacts on extremely rare plants and fully protected species listed in Table 6-5 of the ECCC HCP/NCCP.

See HCP pp. 6-23 to 6-25, and Table 6-5.
a. Avoiding direct impacts on extremely rare plants, fully protected wildlife species, or migratory birds. No extremely rare plants are found were found to exist on the Project Site. Fully Protected species include white-tailed kite, peregrine falcon, golden eagle, and ringtail. Only White-tailed Kite was found to have a moderate potential of occurrence on the site. Project activities will avoid any take of these species as defined under the California Fish and Game Code. Project activities will not disturb or destroy nests of these nests or of other birds.

All birds covered by the Plan (tricolored blackbird, western burrowing owl, golden eagle, and Swainson’s hawk) are also considered migratory birds and subject to the prohibitions of the Migratory Bird Treaty Act (MBTA). Actions conducted under the Plan must comply with the Provisions of the MBTA and avoid killing or possessing covered migratory birds, their young, nests, feathers, or eggs.

2. Conservation Measure 1.10. Maintain Hydrologic Conditions and Minimize Erosion. All new development must avoid or minimize direct and indirect impacts on local hydrological conditions and erosion by incorporating the applicable Provision C.3 Amendments of the Contra Costa County Clean Water Program’s (CCCCWP’s) amended NPDES Permit (order no. R2-2003-0022; permit no. CAS002912).

The overall goal of this measure is to ensure that new development covered under the HCP has no or minimal adverse effects on downstream fisheries to avoid take of fish listed under ESA or CESA. See HCP pp. 6-21 to 6-22.
a. New project and its planners will develop stormwater treatment controls, implement a verification program for treatment controls to ensure that all installed controls are being appropriately operated and maintained, control peak runoff flows and volumes by means of creation and implementation of a Hydrograph Modification Management Plan subject to Provision requirements, provide compensatory mitigation to the appropriate jurisdiction (City of Brentwood) for projects where meeting Provision requirements are physically impractical, and limit the use of stormwater controls that function primarily as infiltration devices in order to protect groundwater quality and local stream hydrograph.

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ATTACHMENT D:FEE CALCULATOR

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ECCC HCP/NCCP 2023+A1:I41 Fee Calculator Worksheet
Permanent Impacts
PROJECT APPLICANT:

PROJECT NAME:

APN(s):

JURISDICTION:

DATE:

DEVELOPMENT FEE

PERMANENT IMPACTS
(ACRES)
2023 FEE/ACRE
subject to change 1
Fee Zone 1 14.48 x $19,871.91 = $287,745.26
Fee Zone 2 x $39,743.83 = $0.00
Fee Zone 3 x $9,935.96 = $0.00
Fee Zone 42 x $29,807.87 = $0.00
Development Fee Total = $287,745.26

WETLAND MITIGATION FEE

PERMANENT IMPACTS
(ACRES)
2023 FEE/ACRE
subject to change 1
x $111,060.40 = $0.00
Perennial Wetland x $170,908.06 = $0.00
Seasonal Wetland x $401,479.18 = $0.00
Alkali Wetland x $405,871.63 = $0.00
Ponds x $221,421.23 = $0.00
Aquatic (open water) x $110,711.14 = $0.00
Slough / Channel x $156,815.09 = $0.00

STREAMS

PERMANENT IMPACTS
(LINEAR FEET)
2023 FEE/LINEAR FT
subject to change 1
x $580.00 = $0.00
x $869.47 = $0.00
Wetland Mitigation Fee Total = $0.00
FEE REDUCTION4 Development Fee reduction for land in lieu of fee = Development Fee reduction (up to 33% ) for permanent assessments = Wetland Mitigation Fee reduction for wetland restoration/creation performed by applicant = Reduction Total = $0.00
FINAL FEE CALCULATION Development Fee Total $287,745.26 Wetland Mitigation Fee Total + $0.00
Mitigation Fee Subtotal = $287,745.26
+
= $287,745.26
Raney Planning & Management, Inc.

Brentwood Sand Creek Sports Complex
019-110-032 and 019-110-046
November 28, 2023
City of Brentwood
Impacts to riparian/scrub, wetlands, ponds,
aquatic, and slough/channel are charged
both a wetland mitigation fee and a
development fee. Please also include these
impact acres to development fee above.3
See appropriate ordinance or HCP/NCCP
Figure 9-1 to determine Fee Zone
Contribution to Recovery5
Streams greater than 25 feet wide

TOTAL AMOUNT TO BE PAID
Streams 25 feet wide or less
Riparian woodland / scrub

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APPENDIX F

ENVIRONMENTAL NOISE ASSESSMENT

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Environmental Noise Assessment
Sand Creek Sports Complex
City of Brentwood, California
January 12, 2024
Project #230505
Prepared for:

Raney Planning & Management, Inc.
1501 Sports Drive, Suite A
Sacramento, CA 95834
Prepared by:

Saxelby Acoustics LLC
Luke Saxelby, INCE Bd. Cert.

Principal Consultant
Board Certified, Institute of Noise Control Engineering (INCE)

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Sand Creek Sports Complex
City of Brentwood, CA
Job #230505
January 12, 2024 www.SaxNoise.com
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INTRODUCTION................................................................................................................................ 1 ENVIRONMENTAL SETTING .............................................................................................................. 1 BACKGROUND INFORMATION ON NOISE........................................................................................................ 1 EXISTING NOISE AND VIBRATION ENVIRONMENTS........................................................................... 6 EXISTING NOISE RECEPTORS ........................................................................................................................ 6 EXISTING GENERAL AMBIENT NOISE LEVELS ................................................................................................... 6 FUTURE TRAFFIC NOISE ENVIRONMENT AT OFF-SITE RECEPTORS ..................................................... 7 OFF-SITE TRAFFIC NOISE IMPACT ASSESSMENT METHODOLOGY........................................................................ 7 EVALUATION OF FUTURE TRANSPORTATION NOISE ON PROJECT SITE.............................................. 8 EVALUATION OF PROJECT OPERATIONAL NOISE ON EXISTING SENSITIVE RECEPTORS .................... 10 CONSTRUCTION NOISE ENVIRONMENT .......................................................................................... 13 CONSTRUCTION VIBRATION ENVIRONMENT .................................................................................. 13 REGULATORY CONTEXT.................................................................................................................. 14 FEDERAL ................................................................................................................................................ 14 STATE.................................................................................................................................................... 14 LOCAL.................................................................................................................................................... 14 CRITERIA FOR ACCEPTABLE VIBRATION........................................................................................................ 18 IMPACTS AND MITIGATION MEASURES.......................................................................................... 19 THRESHOLDS OF SIGNIFICANCE .................................................................................................................. 19 PROJECT-SPECIFIC IMPACTS AND MITIGATION MEASURES .............................................................................. 20 REFERENCES................................................................................................................................... 26 List of Figures
Figure 1: Site Plan.......................................................................................................................................... 2 Figure 2: Noise Measurement Sites and Receptor Locations....................................................................... 3 Figure 3: Future Transportation Noise Levels on Project Site ...................................................................... 9 Figure 4: Phase 1 Noise Contours, Lmax ....................................................................................................... 11 Figure 5: Phase 2 Noise Levels, Lmax ............................................................................................................ 12 Figure 6: Phase 2 Noise Barrier Location & Resulting Noise Levels (Lmax) .................................................. 22

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City of Brentwood, CA
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January 12, 2024 www.SaxNoise.com
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Table 1: Typical Noise Levels......................................................................................................................... 4 Table 2: Summary of Existing Background Noise Measurement Data ......................................................... 7 Table 3: Predicted Traffic Noise Level and Project-Related Traffic Noise Level Increases...........................8 Table 4: Cumulative Traffic Noise Level and Project-Related Traffic Noise Level Increases ........................8 Table 5: Construction Equipment Noise ..................................................................................................... 13 Table 6: Vibration Levels for Various Construction Equipment.................................................................. 13 Table 7: Stationary (Non-Transportation) Noise Standards (Table N-2)..................................................... 15 Table 8: Brentwood Land Use Compatibility Table..................................................................................... 17 Table 9: Effects of Vibration on People and Buildings................................................................................ 19 Table 10: Project Noise Levels with Phase 2 Noise Barrier......................................................................... 21 Appendices
Appendix A: Acoustical Terminology
Appendix B: Field Noise Measurement Data
Appendix C: Traffic Noise Calculations

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City of Brentwood, CA
Job #230505
January 12, 2024 www.SaxNoise.com

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INTRODUCTION
The Sand Creek Sports Complex project is located in the City of Brentwood, California. The project will be constructed in two phases. Phase 1, which will develop the eastern portion of the project site, will include three large sports fields, tennis courts, pickleball courts, multiuse sports courts, a playground, and the project parking lot. Phase 2 will add two new soccer fields and a walking trail to the western portion of the project site.

Sensitive receptors in the vicinity of the project site include single and multifamily residences west, south, and east of the project site.

Figure 1 shows the project site plan. Figure 2 shows an aerial photo of the project site.

ENVIRONMENTAL SETTING

BACKGROUND INFORMATION ON NOISE
Fundamentals of Acoustics
Acoustics is the science of sound. Sound may be thought of as mechanical energy of a vibrating object transmitted by pressure waves through a medium to human (or animal) ears. If the pressure variations occur frequently enough (at least 20 times per second), then they can be heard and are called sound. The number of pressure variations per second is called the frequency of sound and is expressed as cycles per second or Hertz (Hz).

Noise is a subjective reaction to different types of sounds. Noise is typically defined as (airborne) sound that is loud, unpleasant, unexpected or undesired, and may therefore be classified as a more specific group of sounds.

Perceptions of sound and noise are highly subjective from person to person.

Measuring sound directly in terms of pressure would require a very large and awkward range of numbers. To avoid this, the decibel scale was devised. The decibel scale uses the hearing threshold (20 micropascals), as a point of reference, defined as 0 dB. Other sound pressures are then compared to this reference pressure, and the logarithm is taken to keep the numbers in a practical range. The decibel scale allows a million-fold increase in pressure to be expressed as 120 dB, and changes in levels (dB) correspond closely to human perception of relative loudness.

The perceived loudness of sounds is dependent upon many factors, including sound pressure level and frequency content. However, within the usual range of environmental noise levels, perception of loudness is relatively predictable, and can be approximated by A-weighted sound levels. There is a strong correlation between A-weighted sound levels (expressed as dBA) and the way the human ear perceives sound. For this reason, the A-weighted sound level has become the standard tool of environmental noise assessment.

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Sand Creek Sports Complex
City of Brentwood, California
Figure 1
Project Site Plan
Project Location

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Sand Creek Sports Complex
City of Brentwood, California
Figure 2
Noise Measurement Sites
Sand Creek Road
Fairview Avenue

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Sand Creek Sports Complex
City of Brentwood, CA
Job #230505
January 12, 2024 www.SaxNoise.com

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\\192.168.68.50\Saxelby Acoustics\General\Job Folders\230505 Sand Creek Sports Complex\Word\230505 Sand Creek Sports Complex.docx The decibel scale is logarithmic, not linear. In other words, two sound levels 10-dB apart differ in acoustic energy by a factor of 10. When the standard logarithmic decibel is A-weighted, an increase of 10-dBA is generally perceived as a doubling in loudness. For example, a 70-dBA sound is half as loud as an 80-dBA sound, and twice as loud as a 60-dBA sound.

Community noise is commonly described in terms of the ambient noise level, which is defined as the allencompassing noise level associated with a given environment. A common statistical tool is the average, or equivalent, sound level (Leq), which corresponds to a steady-state A-weighted sound level containing the same total energy as a time varying signal over a given time period (usually one hour). The Leq is the foundation of the composite noise descriptor, Ldn, and shows very good correlation with community response to noise.

The day/night average level (DNL or Ldn) is based upon the average noise level over a 24-hour day, with a +10- decibel weighing applied to noise occurring during nighttime (10:00 p.m. to 7:00 a.m.) hours. The nighttime penalty is based upon the assumption that people react to nighttime noise exposures as though they were twice as loud as daytime exposures. Because Ldn represents a 24-hour average, it tends to disguise short-term variations in the noise environment.

Table 1 lists several examples of the noise levels associated with common situations. Appendix A provides a summary of acoustical terms used in this report.

TABLE 1: TYPICAL NOISE LEVELS
Common Outdoor Activities Noise Level (dBA) Common Indoor Activities --110-- Rock Band
Jet Fly-over at 300 m (1,000 ft.) --100--
Gas Lawn Mower at 1 m (3 ft.) --90--
Diesel Truck at 15 m (50 ft.),
at 80 km/hr. (50 mph) --80-- Food Blender at 1 m (3 ft.)Garbage Disposal at 1 m (3 ft.) Noisy Urban Area, Daytime
Gas Lawn Mower, 30 m (100 ft.) --70-- Vacuum Cleaner at 3 m (10 ft.) Commercial Area
Heavy Traffic at 90 m (300 ft.) --60-- Normal Speech at 1 m (3 ft.) Quiet Urban Daytime --50-- Large Business Office
Dishwasher in Next Room
Quiet Urban Nighttime --40-- Theater, Large Conference Room (Background) Quiet Suburban Nighttime --30-- Library
Quiet Rural Nighttime --20-- Bedroom at Night, Concert Hall (Background) --10-- Broadcast/Recording Studio
Lowest Threshold of Human Hearing --0-- Lowest Threshold of Human Hearing Source: Caltrans, Technical Noise Supplement, Traffic Noise Analysis Protocol. September, 2013.

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City of Brentwood, CA
Job #230505
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The effects of noise on people can be placed in three categories:
• Subjective effects of annoyance, nuisance, and dissatisfaction • Interference with activities such as speech, sleep, and learning • Physiological effects such as hearing loss or sudden startling Environmental noise typically produces effects in the first two categories. Workers in industrial plants can experience noise in the last category. There is no completely satisfactory way to measure the subjective effects of noise or the corresponding reactions of annoyance and dissatisfaction. A wide variation in individual thresholds of annoyance exists and different tolerances to noise tend to develop based on an individual’s past experiences with noise.

Thus, an important way of predicting a human reaction to a new noise environment is the way it compares to the existing environment to which one has adapted: the so-called ambient noise level. In general, the more a new noise exceeds the previously existing ambient noise level, the less acceptable the new noise will be judged by those hearing it.

With regards to increases in A-weighted noise level, the following relationships occur:
• Except in carefully controlled laboratory experiments, a change of 1-dBA cannot be perceived; • Outside of the laboratory, a 3-dBA change is considered a just-perceivable difference; • A change in level of at least 5-dBA is required before any noticeable change in human response would be expected; and
• A 10-dBA change is subjectively heard as approximately a doubling in loudness and can cause an adverse response.

Stationary point sources of noise – including stationary mobile sources such as idling vehicles – attenuate (lessen) at a rate of approximately 6-dB per doubling of distance from the source, depending on environmental conditions (i.e. atmospheric conditions and either vegetative or manufactured noise barriers, etc.). Widely distributed noises, such as a large industrial facility spread over many acres or a street with moving vehicles, would typically attenuate at a lower rate.

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City of Brentwood, CA
Job #230505
January 12, 2024 www.SaxNoise.com

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EXISTING NOISE AND VIBRATION ENVIRONMENTS

EXISTING NOISE RECEPTORS
Some land uses are considered more sensitive to noise than others. Land uses often associated with sensitive receptors generally include residences, schools, libraries, hospitals, and passive recreational areas. Sensitive noise receptors may also include threatened or endangered noise-sensitive biological species, although many jurisdictions have not adopted noise standards for wildlife areas. Noise sensitive land uses are typically given special attention in order to achieve protection from excessive noise.

Sensitivity is a function of noise exposure (in terms of both exposure duration and insulation from noise) and the types of activities involved. In the vicinity of the project site, sensitive land uses include existing singlefamily residential uses to the west, south, and north of the project site and multifamily residential uses to the southwest of the project site.

EXISTING GENERAL AMBIENT NOISE LEVELS
To quantify the existing ambient noise environment in the project vicinity, Saxelby Acoustics conducted continuous (24-hr.) noise level measurements at two locations on the project site. Noise measurement locations are shown on Figure 2. A summary of the noise level measurement survey results is provided in Table

2. Appendix B contains the complete results of the noise monitoring.

The sound level meters were programmed to record the maximum, median, and average noise levels at each site during the survey. The maximum value, denoted Lmax, represents the highest noise level measured. The average value, denoted Leq, represents the energy average of all of the noise received by the sound level meter microphone during the monitoring period. The median value, denoted L50, represents the sound level exceeded 50 percent of the time during the monitoring period.

Larson Davis Laboratories (LDL) model 812 and 820 precision integrating sound level meters were used for the ambient noise level measurement survey. The meters were calibrated before and after use with a CAL 200 acoustical calibrator to ensure the accuracy of the measurements. The equipment used meets all pertinent specifications of the American National Standards Institute for Type 1 sound level meters (ANSI S1.4).

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City of Brentwood, CA
Job #230505
January 12, 2024 www.SaxNoise.com

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\\192.168.68.50\Saxelby Acoustics\General\Job Folders\230505 Sand Creek Sports Complex\Word\230505 Sand Creek Sports Complex.docx TABLE 2: SUMMARY OF EXISTING BACKGROUND NOISE MEASUREMENT DATA Location Date Ldn
Daytime
Leq
Daytime
L50
Daytime
Lmax
Nighttime
Leq
Nighttime
L50
Nighttime
Lmax
LT-1: Western
Project
Boundary
5/27/23 60 61 45 75 43 38 56
5/28/23 52 52 42 73 42 39 57
5/29/23 52 50 44 70 44 40 59
LT-2:

Northeastern
Project
Boundary
5/27/23 55 51 48 67 48 43 64
5/28/23 54 51 47 69 47 44 62
5/29/23 56 52 48 69 49 45 65
Notes:
• All values shown in dBA
• Daytime hours: 7:00 a.m. to 10:00 p.m.
• Nighttime Hours: 10:00 p.m. to 7:00 a.m.
• Source: Saxelby Acoustics 2023

FUTURE TRAFFIC NOISE ENVIRONMENT AT OFF-SITE RECEPTORS

OFF-SITE TRAFFIC NOISE IMPACT ASSESSMENT METHODOLOGY
To assess noise impacts due to project-related traffic increases on the local roadway network, traffic noise levels are predicted at sensitive receptors for existing and future, project and no-project conditions.

Existing and Cumulative noise levels due to traffic are calculated using the Federal Highway Administration Highway Traffic Noise Prediction Model (FHWA RD-77-108). The model is based upon the Calveno reference noise factors for automobiles, medium trucks and heavy trucks, with consideration given to vehicle volume, speed, roadway configuration, distance to the receiver, and the acoustical characteristics of the site.

The FHWA model was developed to predict hourly Leq values for free-flowing traffic conditions. To predict traffic noise levels in terms of Ldn, it is necessary to adjust the input volume to account for the day/night distribution of traffic.

Project trip generation volumes were provided by the project traffic engineer (Fehr & Peers 2023). Truck usage and vehicle speeds on the local area roadways were estimated from field observations. The predicted increases in traffic noise levels on the local roadway network for Existing and Cumulative conditions which would result from the project are provided in terms of Ldn.

Traffic noise levels are predicted at the sensitive receptors located at the closest typical setback distance along each project-area roadway segment. In some locations, sensitive receptors may not receive full shielding from noise barriers or may be located at distances which vary from the assumed calculation distance.

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\\192.168.68.50\Saxelby Acoustics\General\Job Folders\230505 Sand Creek Sports Complex\Word\230505 Sand Creek Sports Complex.docx Tables 3 and 4 summarize the modeled traffic noise levels at the nearest sensitive receptors along each roadway segment in the Project area. Appendix C provides the complete inputs and results of the FHWA traffic modeling.

TABLE 3: PREDICTED TRAFFIC NOISE LEVEL AND PROJECT-RELATED TRAFFIC NOISE LEVEL INCREASES Roadway Segment
Predicted Exterior Noise Level (dBA
Ldn) at Closest Sensitive Receptors
Existing No
Project
Existing +
Project Change
Sand Creek Road East of Linden St. 52.0 52.1 0.1
Sand Creek Road West of Linden St. 60.6 60.7 0.1
Fairview Ave North of Sand Creek Rd. 57.8 57.8 0.0
Sand Creek Road East of Fairvew Ave. 61.0 61.1 0.1
Fairview Ave South of Sand Creek Rd. 56.0 56.1 0.1
Sand Creek Road West of West Prj. Dwy 59.1 59.2 0.1
TABLE 4: CUMULATIVE TRAFFIC NOISE LEVEL AND PROJECT-RELATED TRAFFIC NOISE LEVEL INCREASES Roadway Segment
Predicted Exterior Noise Level (dBA
Ldn) at Closest Sensitive Receptors
Cumulative
No Project
Cumulative
+ Project Change
Sand Creek Road East of Linden St. 53.4 53.4 0.0
Sand Creek Road West of Linden St. 62.0 62.1 0.1
Fairview Ave North of Sand Creek Rd. 58.8 58.9 0.1
Sand Creek Road East of Fairvew Ave. 62.4 62.5 0.1
Fairview Ave South of Sand Creek Rd. 57.1 57.1 0.0
Sand Creek Road West of West Prj. Dwy 60.5 60.6 0.1
Based upon the Tables 3 and 4 data, the proposed project is predicted to result in a maximum traffic noise level increase of 0.1 dBA.

EVALUATION OF FUTURE TRANSPORTATION NOISE ON PROJECT SITE Saxelby Acoustics used the SoundPLAN noise model to calculate traffic noise levels at the proposed residential uses due to traffic on Sand Creek Road. Inputs to the SoundPLAN noise model include topography, existing structures, roadway elevations, and the proposed building pad elevations. Sand Creek Road was estimated to increase by +1.4 dBA based upon project traffic increases provided by the project traffic engineer (Fehr & Peers). The results of this analysis are shown graphically on Figure 3.

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Sand Creek Sports Complex
City of Brentwood, California
Figure 3Transportation Noise Levels (dB(A), Ldn)
Legend
Proposed BuildingNeighboring ParcelsProject SiteOutdoor Area Noise Level Sand Creek Sports Complex
65 dBA
70 dBA
75 dBA
57 59 62
63 Sand Creek Road
Noise level
Ldn
in dB(A)
<= 65
65 < <= 7070 < <= 7575 <
Scale 1:250
0 50 100 200 300 400
feet

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City of Brentwood, CA
Job #230505
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EVALUATION OF PROJECT OPERATIONAL NOISE ON EXISTING SENSITIVE RECEPTORS Outdoor recreational noise associated with the proposed athletic amenities and parking lot traffic circulation are considered to be the primary noise sources for this project. The following is a list of assumptions used for the noise modeling. Project operational noise is assumed to occur during daytime (7:00 am. to 10:00 p.m.) hours only. The data used is based upon Saxelby Acoustics data from similar operations.

Multi-Use Fields: The proposed synthetic turf multi-use field has the capability to hold either three fullsized soccer fields, six small kid’s soccer fields, three lacrosse fields, or softball practice areas. Phase 2 of the project would add two more soccer fields for a total of five. The loudest Leq and Lmax values are expected to occur during soccer tournaments utilizing the full sized fields. Based upon measurements taken at various facilities, soccer tournament games produced noise levels up to 58 dBA Leq and 76 dBA Lmax at 200 feet as measured from the center of the field to sidelines opposite of spectators. The multiuse fields were modeled as operating concurrently during a peak hour.

Tennis Courts: Tennis Courts are expected to produce noise levels of up to 52 dBA Leq and 62 dBA Lmax at a distance of 50 feet from the center of the court.

Pickleball Courts: Pickleball gameplay is expected to produce noise levels of approximately 61 dBA Leq at 25 feet from the edge of the end of a single court and 56 dBA Leq at 25 feet from the edge of the side of a single court. Maximum (Lmax) noise levels for a typical pickleball game were found to be 81 dBA at 25 feet. 1
Multi-Use Courts: The proposed multi-use hard courts are expected to be used for pickleball, futsal, roller hockey, basketball, and volleyball. Saxelby Acoustics conservatively assumed typical noise levels similar to pickleball gameplay. Saxelby Acoustics assumed that gameplay could occur continuously at this noise level on all courts during a peak hour of activity.

Play Area: Recreational activity in center of playground area at 55 dBA Leq and 67 dBA Lmax at 50 feet. Saxelby Acoustics data.

On-Site Circulation: The project is projected to generate up to 580 trips in the evening peak hour (Fehr & Peers 2023). It was assumed that two of these trips could be heavy trucks. Parking lot movements are predicted to generate a sound exposure level (SEL) of 71 dBA SEL at 50 feet for cars and 85 dBA SEL at 50 feet for trucks. Saxelby Acoustics data.

Saxelby Acoustics used the SoundPLAN noise prediction model. Inputs to the model included sound power levels for the proposed amenities, existing and proposed buildings, terrain type, and locations of sensitive receptors. These predictions are made in accordance with International Organization for Standardization (ISO) standard 9613‐2:1996 (Acoustics – Attenuation of sound during propagation outdoors). ISO 9613 is the most commonly used method for calculating exterior noise propagation. Figure 4 shows the maximum noise levels resulting from operation of Phase 1 of the project. Figure 5 shows the maximum noise levels resulting from operation of Phase 1 and Phase 2 of the project.
1 Data was collected using Fast meter response.

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Sand Creek Sports Complex
City of Brentwood, California
Figure 4Phase 1 Maximum Noise Levels (dB(A) Lmax)
Legend
Neighboring ParcelsProject SiteExisting Wall
Sand Creek Sports Complex
R1
55 R4
59 R5
65 R2
54 R6 64
R3
55 Sand Creek Road
Fairview Avenue
Noise level
Lmax
in dB(A)
<= 70
70 < <= 7171 < <= 7272 < <= 7373 < <= 7474 < <= 7575 < Scale 1:275 0 50 100 200 300 400
feet

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Sand Creek Sports Complex
City of Brentwood, California
Figure 5Phase 1 & 2 Maximum Noise Levels (dB(A) Lmax)
Legend
Neighboring ParcelsProject SiteExisting Wall
Sand Creek Sports Complex
R1
68 R4
62 R5
65 71 R2
R6 64
R3
75 Sand Creek Road
Fairview Avenue
Noise level
Lmax
in dB(A)
<= 70
70 < <= 7171 < <= 7272 < <= 7373 < <= 7474 < <= 7575 < Scale 1:275 0 50 100 200 300 400
feet

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City of Brentwood, CA
Job #230505
January 12, 2024 www.SaxNoise.com

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CONSTRUCTION NOISE ENVIRONMENT
During the construction of the proposed project, noise from construction activities would temporarily add to the noise environment in the project vicinity. As shown in Table 5, activities involved in construction would generate maximum noise levels ranging from 76 to 90 dB at a distance of 50 feet.

TABLE 5: CONSTRUCTION EQUIPMENT NOISE
Type of Equipment Maximum Level, dBA at 50 feet
Auger Drill Rig 84
Backhoe 78
Compactor 83
Compressor (air) 78
Concrete Saw 90
Dozer 82
Dump Truck 76
Excavator 81
Generator 81
Jackhammer 89
Pneumatic Tools 85
Source: Roadway Construction Noise Model User’s Guide. Federal Highway Administration. FHWA-HEP-05-054. January 2006.

CONSTRUCTION VIBRATION ENVIRONMENT
The primary vibration-generating activities associated with the proposed project would occur during construction when activities such as grading, utilities placement, and parking lot construction occur. Table 6 shows the typical vibration levels produced by construction equipment.

TABLE 6: VIBRATION LEVELS FOR VARIOUS CONSTRUCTION EQUIPMENT Type of Equipment
Peak Particle Velocity at
25 feet
(inches/second)
Peak Particle Velocity at
50 feet
(inches/second)
Peak Particle Velocity at
100 feet
(inches/second)
Large Bulldozer 0.089 0.031 0.011
Loaded Trucks 0.076 0.027 0.010
Small Bulldozer 0.003 0.001 0.000
Auger/drill Rigs 0.089 0.031 0.011
Jackhammer 0.035 0.012 0.004
Vibratory Hammer 0.070 0.025 0.009
Vibratory Compactor/roller 0.210
(Less than 0.20 at 26 feet) 0.074 0.026
Source: Transit Noise and Vibration Impact Assessment Guidelines. Federal Transit Administration. May 2006.

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City of Brentwood, CA
Job #230505
January 12, 2024 www.SaxNoise.com

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REGULATORY CONTEXT

FEDERAL
There are no federal regulations related to noise that apply to the Proposed Project.

STATE
California Environmental Quality Act
The California Environmental Quality Act (CEQA) Guidelines, Appendix G, indicate that a significant noise impact may occur if a project exposes persons to noise or vibration levels in excess of local general plans or noise ordinance standards, or cause a substantial permanent or temporary increase in ambient noise levels.

CEQA standards are discussed more below under the Thresholds of Significance section.

State Building Code, Title 24, Part 2 of the State of California Code of Regulations The State Building Code, Title 24, Part 2 of the State of California Code of Regulations, establishes uniform minimum noise insulation performance standards to protect persons within new buildings which house people, including hotels, motels, dormitories, apartment houses, and dwellings other than single-family dwellings. Title 24 mandates that interior noise levels attributable to exterior sources shall not exceed 45 dB Ldn or CNEL in any habitable room. Title 24 also mandates that for structures containing noise-sensitive uses to be located where the Ldn or CNEL exceeds 60 dB, an acoustical analysis must be prepared to identify mechanisms for limiting exterior noise to the prescribed allowable interior levels. If the interior allowable noise levels are met by requiring that windows be kept closed, the design for the structure must also specify a ventilation or air conditioning system to provide a habitable interior environment.

LOCAL
City of Brentwood General Plan
Policies
Policy N 1-2: Require development and infrastructure projects to be consistent with the Land Use Compatibility for Community Noise Environments standards indicated in Figure 5 to ensure acceptable noise levels for existing and future development.

Policy N 1-5: Periodically review and update, as necessary, Chapter 9.32 (Noise Regulations) of the Brentwood Municipal Code in order to address issues such as excessive noise from commercial, industrial, and other noise generating land uses, as well as vehicle noise, to the extent allowed by State law.

Policy N 1-7: For projects that are required by the California Environmental Quality Act (CEQA) to analyze noise impacts, the following criteria shall be used to determine the significance of those impacts:

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City of Brentwood, CA
Job #230505
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\\192.168.68.50\Saxelby Acoustics\General\Job Folders\230505 Sand Creek Sports Complex\Word\230505 Sand Creek Sports Complex.docx Stationary and Non-Transportation Noise Sources
• A significant impact will occur if the project results in an exceedance of the noise level standards contained in this element, or the project will result in an increase in ambient noise levels by more than 3 dB, whichever is greater.

Transportation Noise Sources
• Where existing traffic noise levels are less than 60 dB Ldn at the outdoor activity areas of noise-sensitive uses, a +5 dB Ldn increase in roadway noise levels will be considered significant; and
• Where existing traffic noise levels range between 60 and 65 dB Ldn at the outdoor activity areas of noise-sensitive uses, a +3 dB Ldn increase in roadway noise levels will be considered significant; and
• Where existing traffic noise levels are greater than 65 dB Ldn at the outdoor activity areas of noise-sensitive uses, a + 1.5 dB Ldn increase in roadway noise levels will be considered significant.

Policy N 1-13 Ensure that new development does not result in indoor noise levels exceeding 45 dBA Ldn for residential uses.

TABLE 7: STATIONARY (NON-TRANSPORTATION) NOISE STANDARDS (TABLE N-2) Land Use Receiving the
Noise
Hourly Noise-Level
Descriptor
Exterior Noise-Level Standard (dBA)
Daytime (7am-10pm) Nighttime (10pm-7am)
Residential
Leq 55 45
Lmax 70 65
Notes:
a) The residential standards apply to all properties that are zoned for residential use. The exterior noise level standard is to be applied at the property line of the receiving land use or at a designated outdoor activity area (at the discretion of the Community Development Director) of the new development. For mixed-use projects, the exterior noise level standard may be waived (at the discretion of the Community Development Director) if the project does not include a designated activity area and mitigation of property line noise is not practical. These noise level standards do not apply to residential units established in conjunction with industrial or commercial uses (e.g., caretaker dwellings). The City can impose standards that are more restrictive than specified above based upon determination of existing low ambient noise levels. b) Each of the noise levels specified above shall be lowered by 5 dBA for tonal noises characterized by a whine, screech, or hum, noises consisting primarily of speech or music, or recurring impulsive noises. In no case shall mitigation be required to a level that is less than existing ambient noise levels, as determined through measurements conducted during the same operational period as the subject noise source.
c) In situations where the existing noise level exceeds the noise levels indicated in the above table, any new noise source must include mitigation that reduces the noise level of the noise source to the existing level plus 3 dB. d) Exterior noise exposure level not exceeding 65 dB Ldn is allowed along the State Route 4 corridor, the Union Pacific Railroad corridor, and arterial roadways.

Action N 1e: During the environmental review process, determine if proposed construction will constitute a significant impact on nearby residents and, if necessary, require mitigation

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City of Brentwood, CA
Job #230505
January 12, 2024 www.SaxNoise.com

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\\192.168.68.50\Saxelby Acoustics\General\Job Folders\230505 Sand Creek Sports Complex\Word\230505 Sand Creek Sports Complex.docx measures in addition to the standard best practice controls. Suggested best practices for control of construction noise include:

1. Construction period shall be less than 12 months;

2. Noise-generating construction activities, including truck traffic coming to and from the construction site for any purpose, shall be limited to between the hours of 7:00 am and 6:00 pm on weekdays, and between 8:00 am and 5:00 pm on Saturdays. No construction shall occur on Sundays or City holidays;

3. All equipment driven by internal combustion engines shall be equipped with mufflers, which are in good condition and appropriate for the equipment;

4. The construction contractor shall utilize “quiet” models of air compressors and other stationary noise sources where technology exists;

5. At all times during project grading and construction, stationary noise generating equipment shall be located as far as practicable from sensitive receptors and placed so that emitted noise is directed away from residences;

6. Unnecessary idling of internal combustion engines shall be prohibited;

7. Construction staging areas shall be established at locations that will create the greatest distance between the construction-related noise sources and noise-sensitive receptors nearest the project site during all project construction activities, to the extent feasible;

8. The required construction-related noise mitigation plan shall also specify that haul truck deliveries are subject to the same hours specified for construction equipment;

9. Neighbors located adjacent to the construction site shall be notified of the construction schedule in writing; and

10. The construction contractor shall designate a “noise disturbance coordinator” who will be responsible for responding to any local complaints about construction noise. The disturbance coordinator shall be responsible for determining the cause of the noise complaint (e.g., starting too early, poor muffler, etc.) and instituting reasonable measures as warranted to correct the problem. A telephone number for the disturbance coordinator shall be conspicuously posted at the construction site.

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City of Brentwood, CA
Job #230505
January 12, 2024 www.SaxNoise.com

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\\192.168.68.50\Saxelby Acoustics\General\Job Folders\230505 Sand Creek Sports Complex\Word\230505 Sand Creek Sports Complex.docx TABLE 8: BRENTWOOD LAND USE COMPATIBILITY TABLE

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City of Brentwood, CA
Job #230505
January 12, 2024 www.SaxNoise.com

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CRITERIA FOR ACCEPTABLE VIBRATION
Vibration is like noise in that it involves a source, a transmission path, and a receiver. While vibration is related to noise, it differs in that noise is generally considered to be pressure waves transmitted through air, whereas vibration usually consists of the excitation of a structure or surface. As with noise, vibration consists of an amplitude and frequency. A person’s perception to the vibration will depend on their individual sensitivity to vibration, as well as the amplitude and frequency of the source and the response of the system which is vibrating.

Vibration can be measured in terms of acceleration, velocity, or displacement. A common practice is to monitor vibration measures in terms of peak particle velocities in inches per second. Standards pertaining to perception as well as damage to structures have been developed for vibration levels defined in terms of peak particle velocities.

Human and structural response to different vibration levels is influenced by a number of factors, including ground type, distance between source and receptor, duration, and the number of perceived vibration events.

Table 9, which was developed by Caltrans, shows the vibration levels which would normally be required to result in damage to structures. The vibration levels are presented in terms of peak particle velocity in inches per second.

Table 9 indicates that the threshold for architectural damage to structures is 0.20 in/sec p.p.v. A threshold of

0.20 in/sec p.p.v. is considered to be a reasonable threshold for short-term construction projects.

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City of Brentwood, CA
Job #230505
January 12, 2024 www.SaxNoise.com

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\\192.168.68.50\Saxelby Acoustics\General\Job Folders\230505 Sand Creek Sports Complex\Word\230505 Sand Creek Sports Complex.docx TABLE 9: EFFECTS OF VIBRATION ON PEOPLE AND BUILDINGS
Peak Particle Velocity Human Reaction Effect on Buildings mm/second in/second

0.15-0.30 0.006-0.019 Threshold of perception; possibility of intrusion
Vibrations unlikely to cause damage of
any type

2.0 0.08 Vibrations readily perceptible
Recommended upper level of the
vibration to which ruins and ancient
monuments should be subjected

2.5 0.10 Level at which continuous vibrations
begin to annoy people
Virtually no risk of “architectural”
damage to normal buildings

5.0 0.20
Vibrations annoying to people in
buildings (this agrees with the levels
established for people standing on
bridges and subjected to relative
short periods of vibrations)
Threshold at which there is a risk of
“architectural” damage to normal
dwelling - houses with plastered walls
and ceilings. Special types of finish such
as lining of walls, flexible ceiling
treatment, etc., would minimize
“architectural” damage
10-15 0.4-0.6
Vibrations considered unpleasant by
people subjected to continuous
vibrations and unacceptable to some
people walking on bridges
Vibrations at a greater level than
normally expected from traffic, but
would cause “architectural” damage
and possibly minor structural damage
Source: Transportation Related Earthborne Vibrations. Caltrans. TAV-02-01-R9601. February 20, 2002.

IMPACTS AND MITIGATION MEASURES

THRESHOLDS OF SIGNIFICANCE
Appendix G of the CEQA Guidelines states that a project would normally be considered to result in significant noise impacts if noise levels conflict with adopted environmental standards or plans or if noise generated by the project would substantially increase existing noise levels at sensitive receivers on a permanent or temporary basis. Significance criteria for noise impacts are drawn from CEQA Guidelines Appendix G (Items XI [a-c]).

Would the project:
a. Generate a substantial temporary or permanent increase in ambient noise levels in the vicinity of the project in excess of standards established in the local general plan or noise ordinance, or applicable standards of other agencies?
b. Generate excessive groundborne vibration or groundborne noise levels? c. For a project located within the vicinity of a private airstrip or an airport land use plan or, where such a plan has not been adopted, within two miles of a public airport or public use airport, would the project expose people residing or working in the project area to excessive noise levels? The proposed project is not located within two miles of a public or private airport, therefore item “c” is not discussed any further in this study.

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Sand Creek Sports Complex
City of Brentwood, CA
Job #230505
January 12, 2024 www.SaxNoise.com

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\\192.168.68.50\Saxelby Acoustics\General\Job Folders\230505 Sand Creek Sports Complex\Word\230505 Sand Creek Sports Complex.docx Noise Level Increase Criteria for Long-Term Project-Related Noise Level Increases The City of Brentwood defines a significant increase as the following:

Stationary and Non-Transportation Noise Sources
• A significant impact will occur if the project results in an exceedance of the noise level standards contained in this element, or the project will result in an increase in ambient noise levels by more than 3 dB, whichever is greater.

Temporary Construction Noise Impacts
With temporary noise impacts (construction), identification of “substantial increases” depends upon the duration of the impact, the temporal daily nature of the impact, and the absolute change in decibel levels. Per the City of Brentwood Municipal Code, construction activities operating outside the hours of 7:00 am and 6:00 pm on weekdays, and between 8:00 am and 5:00 pm on Saturdays are prohibited.

The City has not adopted any formal standard for evaluating temporary construction noise which occurs within allowable hours. For short-term noise associated with Project construction, Saxelby Acoustics recommends use of the Caltrans increase criteria of 12 dBA (Caltrans Traffic Noise Protocol, 2020), applied to existing residential receptors in the project vicinity. This level of increase is approximately equivalent to a doubling of sound energy and has been the standard of significance for Caltrans projects at the state level for many years.

Application of this standard to construction activities is considered reasonable considering the temporary nature of construction activities.

PROJECT-SPECIFIC IMPACTS AND MITIGATION MEASURES
Impact 1: Would the project generate a substantial temporary or permanent increase in ambient noise levels in the vicinity of the project in excess of standards established in the local general plan or noise ordinance, or applicable standards of other agencies? Traffic Noise Increases at Off-Site Receptors
The City of Brentwood specifies criteria to determine the significance of traffic noise impacts. Where existing traffic noise levels are greater than 65 dB Ldn, a +1.5 dB Ldn increase in roadway noise levels will be considered significant. According to Tables 3 and 4, the maximum increase is traffic noise at the nearest sensitive receptor

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City of Brentwood, CA
Job #230505
January 12, 2024 www.SaxNoise.com

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\\192.168.68.50\Saxelby Acoustics\General\Job Folders\230505 Sand Creek Sports Complex\Word\230505 Sand Creek Sports Complex.docx is predicted to be 0.1 dBA. Because this is less than the minimum significance threshold of +1.5 dBA, impacts resulting from increased traffic noise would be considered less-than-significant, and no mitigation is required.

Operational Noise at Existing Sensitive Receptors
The City of Brentwood noise level standards require that new projects in the vicinity of existing sensitive receptors generate noise levels no greater than 55 dBA Leq and 70 dBA Lmax during daytime (7:00 a.m. to 10:00 p.m.) hours. For noise sources characterized by a whine, screech, or hum, such as noises consisting primarily of speech or music, or recurring impulsive noises shall have the average and maximum noise standard lowered to 50 dBA, Leq and 65 dBA, Lmax. However, the City’s General Plan states that a project shall not be required to mitigate to noise levels which are below the measured ambient. Table 2 shows the measured ambient noise levels at sensitive receptors adjacent to the project site. Based upon these values, the project should not generate noise levels greater than 55 dBA Leq and 70 dBA Lmax at the receptors to the west, and 55 dBA Leq and 67 dBA Leq at the receptors to the east.

As shown on Figure 4, Phase 1 of the project is predicted to expose nearby residences to noise levels up to 65 dBA Lmax at receptors to the east and 55-59 dBA Lmax at receptors to the west. This would comply with the adjusted standard of 67 dBA Lmax and requires no mitigation.

As shown on Figure 5, Phase 1 and Phase 2 of the project are predicted to expose nearby residences to noise levels up to 65 dBA Lmax at receptors to the east and 75 dBA Lmax at receptors to the west. This would exceed the adjusted noise standard of 70 dBA Lmax at the residences to the west. Therefore, this would be considered a potentially significant impact. Saxelby Acoustics recommends mitigation measure 1(a) which specifies the construction of a sound wall to reduce noise levels.

Figure 6 shows the required location of the sound barrier. Table 10 below shows the assessment of all applicable noise levels with a noise barrier.

TABLE 10: PROJECT NOISE LEVELS WITH PHASE 2 NOISE BARRIER Receptor Project
Leq/Lmax
Ambient
Leq/Lmax
Increase to
Ambient Leq
Increase
Threshold
Leq
Complies with
Standards?
1 46/64 50/70 1.5 3.0 Yes
2 47 /66 50/70 1.8 3.0 Yes
3 50/69 50/70 3.0 3.0 Yes
4 48/62 50/70 2.1 3.0 Yes
5 49/65 52/67 1.8 3.0 Yes
6 48/64 52/67 1.5 3.0 Yes
Notes: All noise levels in the above table are shown in dBA.

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Sand Creek Sports Complex
City of Brentwood, California
Figure 6Phase 1 & 2 Maximum Noise Levels with Mitigation (dB(A) Lmax) Legend
Neighboring ParcelsProject SiteExisting Wall8‐foot‐tall Sound Wall Sand Creek Sports Complex
R1
64 R4
62 R5
65 R2 66
R6 64
R3
69 Sand Creek Road
Fairview Avenue
Noise level
Lmax
in dB(A)
<= 70
70 < <= 7171 < <= 7272 < <= 7373 < <= 7474 < <= 7575 <
Scale 1:275
0 50 100 200 300 400
feet

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City of Brentwood, CA
Job #230505
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\\192.168.68.50\Saxelby Acoustics\General\Job Folders\230505 Sand Creek Sports Complex\Word\230505 Sand Creek Sports Complex.docx Construction Noise
During the construction phases of the project, noise from construction activities would add to the noise environment in the immediate project vicinity. As indicated in Table 5, activities involved in construction would generate maximum noise levels ranging from 76 to 90 dBA Lmax at a distance of 50 feet. Construction activities would also be temporary in nature and are anticipated to occur during normal daytime working hours.

Caltrans defines a significant increase due to noise as an increase of 12 dBA over existing ambient noise levels; Saxelby Acoustics used this criterion to evaluate increases due to construction noise associated with the project. As shown in Table 5, construction equipment is predicted to generate noise levels of up to 90 dBA Lmax at 50 feet. Construction noise is evaluated as occurring at the center of the site to represent average noise levels generated over the duration of construction across the project site. The nearest residential uses are located approximately 440 feet as measured from the center of the project site. At this distance, maximum construction noise levels would be up to 71 dBA. The average daytime maximum noise level in the vicinity of the sensitive receptors was measured to be 67 dBA. Therefore, project construction would not cause an increase of greater than 12 dBA over existing ambient noise levels.

Noise would also be generated during the construction phase by increased truck traffic on area roadways. A project-generated noise source would be truck traffic associated with transport of heavy materials and equipment to and from the construction site. This noise increase would be of short duration and would occur during daytime hours.

Although construction activities are temporary in nature and would occur during normal daytime working hours, construction-related noise could result in sleep interference at existing noise-sensitive land uses in the vicinity of the construction if construction activities were to occur outside the normal daytime hours.

Therefore, impacts resulting from noise levels temporarily exceeding the threshold of significance due to construction would be considered potentially significant. Mitigation measure 1(b) would reduce construction noise impacts to less-than-significant.

Transportation Noise on Project Site (Non-CEQA Issue)
Exterior Transportation Noise
Compliance with City’s standards on new noise-sensitive receptors is not a CEQA consideration. However, this information is provided here so that a determination can be made regarding the ability of the proposed project to meet the requirements of the City of Brentwood for exterior noise levels at new sensitive uses proposed under the project.

As shown on Figure 3, several of the proposed outdoor activity areas are predicted to be exposed to exterior transportation noise levels up to approximately 63 dBA Ldn. This would meet the 65 dBA limit for outdoor sports and recreation areas established by the City of Brentwood. Therefore, no additional noise control measures would be required.

Mitigation Measure(s)
Implementation of the following mitigation measures would reduce the above impact to a less-than-significant level.

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City of Brentwood, CA
Job #230505
January 12, 2024 www.SaxNoise.com

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\\192.168.68.50\Saxelby Acoustics\General\Job Folders\230505 Sand Creek Sports Complex\Word\230505 Sand Creek Sports Complex.docx 1(a) Phase 2 of the project must include the construction of an 8-foot-tall barrier at the western and southwestern boundaries of the project site as shown on Figure 6. The barrier height shall be relative to the residential building pads or the soccer field elevation, whichever is greater. Noise barrier walls shall be constructed of concrete panels, concrete masonry units, earthen berms, or any combination of these materials that achieve the required total height. Wood is not recommended due to eventual warping and degradation of acoustical performance. These requirements shall be included in the improvement plans prior to their approval by the City’s Public Works Department. 1(b) Construction activities shall be limited to the hours set forth below:

Monday-Friday 7:00 AM to 6:00 PM
Saturday 8:00 AM to 5:00 PM
Construction shall be prohibited on Sundays and City holidays. These criteria shall be included in the grading plan submitted by the applicant/developer for review and approval of the Community Development Director prior to issuance of grading permits. Exceptions to allow expanded construction activities shall be reviewed on a case-by-case basis as determined by the Chief Building Official and/or City Engineer.

The project contractor shall ensure that the following construction noise BMPs are met on-site during all phases of construction:
• All equipment driven by internal combustion engines shall be equipped with mufflers, air-inlet silencers where appropriate, and any other shrouds, shields, or other noise-reducing features in good operating condition that meet or exceed original factory specifications. Mobile or fixed “package” equipment (e.g., arc welders, air compressors) shall be equipped with shrouds and noise- control features that are readily available for that type of equipment. • All mobile or fixed noise-producing equipment used on the project site that are regulated for noise output by a federal, state, or local agency shall comply with such regulations while in the course of project activity.
• The construction contractor shall utilize “quiet” models of air compressors and other stationary noise sources where technology exists.
• At all times during project grading and construction, stationary noise‐generating equipment shall be located as far as practicable from sensitive receptors and placed so that emitted noise is directed away from residences.
• Unnecessary idling of internal combustion engines shall be prohibited. • Construction staging areas shall be established at locations that would create the greatest distance between the construction-related noise sources and noise-sensitive receptors nearest the project site during all project construction activities, to the extent feasible. • Construction site and access road speed limits shall be established and enforced during the construction period.

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City of Brentwood, CA
Job #230505
January 12, 2024 www.SaxNoise.com

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\\192.168.68.50\Saxelby Acoustics\General\Job Folders\230505 Sand Creek Sports Complex\Word\230505 Sand Creek Sports Complex.docx • The use of noise-producing signals, including horns, whistles, alarms, and bells, shall be for safety warning purposes only.
• Project-related public address or music systems shall not be audible at any adjacent receptor. • Neighbors located adjacent to the construction site shall be notified of the construction schedule in writing.
• The construction contractor shall designate a “noise disturbance coordinator” who would be responsible for responding to any local complaints about construction noise. The disturbance coordinator shall be responsible for determining the cause of the noise complaint (e.g., starting too early, poor muffler, etc.) and instituting reasonable measures as warranted to correct the problem. A telephone number for the disturbance coordinator shall be conspicuously posted at the construction site.

Construction noise BMPs shall be included in the grading plan submitted by the developer for review and approval by the Community Development Director prior to grading permit issuance.

Impact 2: Would the project generate excessive groundborne vibration or groundborne noise levels? Construction vibration impacts include human annoyance and building structural damage. Human annoyance occurs when construction vibration rises significantly above the threshold of perception. Building damage can take the form of cosmetic or structural.

The Table 6 data indicate that construction vibration levels anticipated for the project are less than the 0.2 in/sec threshold at distances of 26 feet. Sensitive receptors which could be impacted by construction related vibrations, especially vibratory compactors/rollers, are located further than 26 feet from typical construction activities. At distances greater than 26 feet construction vibrations are not predicted to exceed acceptable levels. Additionally, construction activities would be temporary in nature and would likely occur during normal daytime working hours.

This is a less-than-significant impact and no mitigation is required.

Impact 3: For a project located within the vicinity of a private airstrip or an airport land use plan or, where such a plan has not been adopted, within two miles of a public airport or public use airport, would the project expose people residing or working in the project area to excessive noise levels?
There are no airports within two miles of the project vicinity. Therefore, this impact is not applicable to the proposed project.

Page 403 of 777 ends

Sand Creek Sports Complex
City of Brentwood, CA
Job #230505
January 12, 2024 www.SaxNoise.com

Page 26 ends

\\192.168.68.50\Saxelby Acoustics\General\Job Folders\230505 Sand Creek Sports Complex\Word\230505 Sand Creek Sports Complex.docx

REFERENCES
American National Standards Institute. (1998). [Standard] ANSI S1.43-1997 (R2007): Specifications for integrating-averaging sound level meters. New York: Acoustical Society of America.

American Standard Testing Methods, Standard Guide for Measurement of Outdoor A-Weighted Sound Levels, American Standard Testing Methods (ASTM) E1014-08, 2008.

ASTM E1014-12. Standard Guide for Measurement of Outdoor A-Weighted Sound Levels. ASTM International. West Conshohocken, PA. 2012.

ASTM E1780-12. Standard Guide for Measuring Outdoor Sound Received from a Nearby Fixed Source. ASTM International. West Conshohocken, PA. 2012.

Barry, T M. (1978). FHWA highway traffic noise prediction model (FHWA-RD-77-108). Washington, DC: U.S.

Department of transportation, Federal highway administration, Office of research, Office of environmental policy.

California Department of Transportation (Caltrans), Technical Noise Supplement, Traffic Noise Analysis Protocol, September 2013.

California Department of Transportation (Caltrans), Traffic Noise Analysis Protocol, May 2011.

Egan, M. D. (1988). Architectural acoustics. United States of America: McGraw-Hill Book Company.

Federal Highway Administration. FHWA Roadway Construction Noise Model User’s Guide. FHWA-HEP-05- 054 DOT-VNTSC-FHWA-05-01. January 2006.

Hanson, Carl E. (Carl Elmer). (2006). Transit noise and vibration impact assessment. Washington, DC: U.S.

Department of Transportation, Federal Transit Administration, Office of Planning and Environment.

International Electrotechnical Commission. Technical committee 29: Electroacoustics. International Organization of Legal Metrology. (2013). Electroacoustics: Sound level meters.

International Organization for Standardization. (1996). Acoustic - ISO 9613-2: Attenuation of sound during propagation outdoors. Part 2: General methods of calculation. Ginevra: I.S.O.

Miller, L. N., Bolt, Beranek, & and Newman, Inc. (1981). Noise control for buildings and manufacturing plants.

Cambridge, MA: Bolt, Beranek and Newman, Inc.

SoundPLAN. SoundPLAN GmbH. Backnang, Germany. http://www.soundplan.eu/english/

Page 404 of 777 ends

Appendix A: Acoustical Terminology
Acoustics The science of sound.

Ambient Noise The distinctive acoustical characteristics of a given space consisting of all noise sources audible at that location. In many cases, the term ambient is used to describe an existing or pre‐project condition such as the setting in an environmental noise study.

ASTC Apparent Sound Transmission Class. Similar to STC but includes sound from flanking paths and correct for room reverberation. A larger number means more attenuation. The scale, like the decibel scale for sound, is logarithmic.

Attenuation The reduction of an acoustic signal.

A‐Weighting A frequency‐response adjustment of a sound level meter that conditions the output signal to approximate human response.

Decibel or dB Fundamental unit of sound, A Bell is defined as the logarithm of the ratio of the sound pressure squared over the reference pressure squared. A Decibel is one‐tenth of a Bell.

CNEL Community Noise Equivalent Level. Defined as the 24‐hour average noise level with noise occurring during evening hours (7 ‐ 10 p.m.) weighted by +5 dBA and nighttime hours weighted by +10 dBA.

DNL See definition of Ldn.

IIC Impact Insulation Class. An integer‐number rating of how well a building floor attenuates impact sounds, such as footsteps. A larger number means more attenuation. The scale, like the decibel scale for sound, is logarithmic.

Frequency The measure of the rapidity of alterations of a periodic signal, expressed in cycles per second or hertz (Hz).

Ldn Day/Night Average Sound Level. Similar to CNEL but with no evening weighting.

Leq Equivalent or energy‐averaged sound level.

Lmax The highest root‐mean‐square (RMS) sound level measured over a given period of time.

L(n) The sound level exceeded a described percentile over a measurement period. For instance, an hourly L50 is the sound level exceeded 50% of the time during the one‐hour period.

Loudness A subjective term for the sensation of the magnitude of sound.

NIC Noise Isolation Class. A rating of the noise reduction between two spaces. Similar to STC but includes sound from flanking paths and no correction for room reverberation.

NNIC Normalized Noise Isolation Class. Similar to NIC but includes a correction for room reverberation.

Noise Unwanted sound.

NRC Noise Reduction Coefficient. NRC is a single‐number rating of the sound‐absorption of a material equal to the arithmetic mean of the sound‐absorption coefficients in the 250, 500, 1000, and 2,000 Hz octave frequency bands rounded to the nearest multiple of 0.05. It is a representation of the amount of sound energy absorbed upon striking a particular surface. An NRC of 0 indicates perfect reflection; an NRC of 1 indicates perfect absorption.

RT60 The time it takes reverberant sound to decay by 60 dB once the source has been removed.

Sabin The unit of sound absorption. One square foot of material absorbing 100% of incident sound has an absorption of 1 Sabin.

SEL Sound Exposure Level. SEL is a rating, in decibels, of a discrete event, such as an aircraft flyover or train pass by, that compresses the total sound energy into a one‐second event.

SPC Speech Privacy Class. SPC is a method of rating speech privacy in buildings. It is designed to measure the degree of speech privacy provided by a closed room, indicating the degree to which conversations occurring within are kept private from listeners outside the room.

STC Sound Transmission Class. STC is an integer rating of how well a building partition attenuates airborne sound. It is widely used to rate interior partitions, ceilings/floors, doors, windows and exterior wall configurations. The STC rating is typically used to rate the sound transmission of a specific building element when tested in laboratory conditions where flanking paths around the assembly don’t exist. A larger number means more attenuation. The scale, like the decibel scale for sound, is logarithmic.

Threshold The lowest sound that can be perceived by the human auditory system, generally considered of Hearing to be 0 dB for persons with perfect hearing.

Threshold Approximately 120 dB above the threshold of hearing. of Pain
Impulsive Sound of short duration, usually less than one second, with an abrupt onset and rapid decay.

Simple Tone Any sound which can be judged as audible as a single pitch or set of single pitches.

Page 405 of 777 ends

Appendix B: Continuous and Short-Term
Ambient Noise Measurement Results

Page 406 of 777 ends

Site: LT-1
Project: Meter:

Leq Lmax L50 L90 Location: Calibrator:

Saturday, May 27, 2023 0:00 37 54 36 33 Coordinates:

Saturday, May 27, 2023 1:00 35 56 33 31
Saturday, May 27, 2023 2:00 35 49 33 31
Saturday, May 27, 2023 3:00 35 51 33 30
Saturday, May 27, 2023 4:00 37 51 35 32
Saturday, May 27, 2023 5:00 38 54 37 33
Saturday, May 27, 2023 6:00 44 54 42 38
Saturday, May 27, 2023 7:00 50 77 46 42
Saturday, May 27, 2023 8:00 54 78 41 39
Saturday, May 27, 2023 9:00 58 80 41 39
Saturday, May 27, 2023 10:00 61 82 41 38
Saturday, May 27, 2023 11:00 63 81 40 37
Saturday, May 27, 2023 12:00 70 84 66 41
Saturday, May 27, 2023 13:00 64 82 45 38
Saturday, May 27, 2023 14:00 64 80 42 38
Saturday, May 27, 2023 15:00 60 78 41 37
Saturday, May 27, 2023 16:00 48 73 42 39
Saturday, May 27, 2023 17:00 52 79 43 40
Saturday, May 27, 2023 18:00 45 63 44 42
Saturday, May 27, 2023 19:00 47 59 46 44
Saturday, May 27, 2023 20:00 48 62 47 44
Saturday, May 27, 2023 21:00 49 65 48 45
Saturday, May 27, 2023 22:00 48 66 46 43
Saturday, May 27, 2023 23:00 46 66 44 41
Leq Lmax L50 L90
61 75 45 40
43 56 38 35
45 59 40 37
70 84 66 45
35 49 33 30
48 66 46 43
60 99
CNEL 60 Night % 1
Day Low
Day High
Night Low
Night High
Ldn Day %
Night Average
CAL200
(37.9453865, -121.7321768)
Saturday, May 27, 2023 Saturday, May 27, 2023
Statistics
Day Average
Appendix B1a: Continuous Noise Monitoring Results
Date Time
Measured Level, dBA Sand Creek Sports Complex
Western Project Boundary
LDL 812-2
54 56
49 51 51
54 54
77 78
80 82 81
84 82 80
78 73
79 63
59 62
65 66 66
33 31 31 30
32 33
38 42
39 39 38 37
41 38 38 37
39 40
42 44 44 45
43 41
37 35 35 35 37
38 44
50 54
58 61
63 70
64 64
60 48
52 45 47 48
49 48
46 25
35 45
55 65
75 85
Measured Hourly Noise Levels, dBA
Time of Day
Measured Ambient Noise Levels vs. Time of Day
Lmax L90 Leq
Noise Measurement Site
LT-1
Sand Creek Rd
Fairview Ave

Page 407 of 777 ends

Site: LT-1
Project: Meter:

Leq Lmax L50 L90 Location: Calibrator:

Sunday, May 28, 2023 0:00 44 66 40 37 Coordinates:

Sunday, May 28, 2023 1:00 41 57 40 36
Sunday, May 28, 2023 2:00 40 58 37 33
Sunday, May 28, 2023 3:00 39 55 36 31
Sunday, May 28, 2023 4:00 39 53 36 31
Sunday, May 28, 2023 5:00 41 56 39 35
Sunday, May 28, 2023 6:00 43 55 41 38
Sunday, May 28, 2023 7:00 46 57 45 41
Sunday, May 28, 2023 8:00 46 63 44 42
Sunday, May 28, 2023 9:00 47 76 40 38
Sunday, May 28, 2023 10:00 56 78 39 36
Sunday, May 28, 2023 11:00 52 79 39 36
Sunday, May 28, 2023 12:00 53 78 39 36
Sunday, May 28, 2023 13:00 49 77 38 36
Sunday, May 28, 2023 14:00 50 72 39 35
Sunday, May 28, 2023 15:00 46 77 38 34
Sunday, May 28, 2023 16:00 56 80 43 38
Sunday, May 28, 2023 17:00 47 67 44 41
Sunday, May 28, 2023 18:00 46 65 45 43
Sunday, May 28, 2023 19:00 57 80 44 42
Sunday, May 28, 2023 20:00 47 67 44 42
Sunday, May 28, 2023 21:00 49 74 44 41
Sunday, May 28, 2023 22:00 42 62 41 39
Sunday, May 28, 2023 23:00 42 53 40 36
Leq Lmax L50 L90
52 73 42 39
42 57 39 35
46 57 38 34
57 80 45 43
39 53 36 31
44 66 41 39
52 95
CNEL 53 Night % 5
Day Low
Day High
Night Low
Night High
Ldn Day %
Night Average
CAL200
(37.9453865, -121.7321768)
Sunday, May 28, 2023 Sunday, May 28, 2023
Statistics
Day Average
Appendix B1b: Continuous Noise Monitoring Results
Date Time
Measured Level, dBA Sand Creek Sports Complex
Western Project Boundary
LDL 812-2
66 57 58
55 53
56 55
57 63
76 78 79 78 77
72 77
80 67
65 80
67 74
62 53
37 36
33 31 31
35 38
41 42
38 36 36 36 36 35 34
38 41
43 42 42 41
39 36
44 41 40 39 39
41 43
46 46 47
56 52 53
49 50
46 56
47 46
57 47 49
42 42
25 35
45 55
65 75
85 Measured Hourly Noise Levels, dBA
Time of Day
Measured Ambient Noise Levels vs. Time of Day
Lmax L90 Leq
Noise Measurement Site
LT-1
Sand Creek Rd
Fairview Ave

Page 408 of 777 ends

Site: LT-1
Project: Meter:

Leq Lmax L50 L90 Location: Calibrator:

Monday, May 29, 2023 0:00 39 52 37 33 Coordinates:

Monday, May 29, 2023 1:00 37 59 35 32
Monday, May 29, 2023 2:00 38 52 35 33
Monday, May 29, 2023 3:00 39 55 37 34
Monday, May 29, 2023 4:00 46 62 44 39
Monday, May 29, 2023 5:00 47 64 45 42
Monday, May 29, 2023 6:00 46 63 45 43
Monday, May 29, 2023 7:00 50 63 49 46
Monday, May 29, 2023 8:00 52 73 49 42
Monday, May 29, 2023 9:00 41 66 40 37
Monday, May 29, 2023 10:00 50 77 39 36
Monday, May 29, 2023 11:00 41 56 38 36
Monday, May 29, 2023 12:00 51 76 40 37
Monday, May 29, 2023 13:00 50 71 41 38
Monday, May 29, 2023 14:00 47 75 42 39
Monday, May 29, 2023 15:00 50 72 40 37
Monday, May 29, 2023 16:00 46 61 44 39
Monday, May 29, 2023 17:00 52 78 46 44
Monday, May 29, 2023 18:00 52 77 48 45
Monday, May 29, 2023 19:00 51 78 45 43
Monday, May 29, 2023 20:00 48 60 46 43
Monday, May 29, 2023 21:00 48 66 46 41
Monday, May 29, 2023 22:00 45 62 43 39
Monday, May 29, 2023 23:00 45 62 42 37
Leq Lmax L50 L90
50 70 44 40
44 59 40 37
41 56 38 36
52 78 49 46
37 52 35 32
47 64 45 43
52 86
CNEL 52 Night % 14
Day Low
Day High
Night Low
Night High
Ldn Day %
Night Average
CAL200
(37.9453865, -121.7321768)
Monday, May 29, 2023 Monday, May 29, 2023
Statistics
Day Average
Appendix B1c: Continuous Noise Monitoring Results
Date Time
Measured Level, dBA Sand Creek Sports Complex
Western Project Boundary
LDL 812-2
52 59
52 55
62 64 63 63
73 66
77 56
76 71
75 72
61 78 77 78
60 66
62 62
33 32 33 34
39 42 43
46 42
37 36 36 37 38 39
37 39
44 45
43 43
41 39
37 39
37 38 39
46 47 46
50 52
41 50
41 51 50
47 50
46 52 52 51
48 48
45 45
25 35
45 55
65 75
85 Measured Hourly Noise Levels, dBA
Time of Day
Measured Ambient Noise Levels vs. Time of Day
Lmax L90 Leq
Noise Measurement Site
LT-1
Sand Creek Rd
Fairview Ave

Page 409 of 777 ends

Site: LT-2
Project: Meter:

Leq Lmax L50 L90 Location: Calibrator:

Saturday, May 27, 2023 0:00 43 58 42 38 Coordinates:

Saturday, May 27, 2023 1:00 41 60 39 35
Saturday, May 27, 2023 2:00 50 78 39 34
Saturday, May 27, 2023 3:00 42 57 38 34
Saturday, May 27, 2023 4:00 43 60 40 35
Saturday, May 27, 2023 5:00 47 64 44 38
Saturday, May 27, 2023 6:00 49 65 48 44
Saturday, May 27, 2023 7:00 52 64 51 47
Saturday, May 27, 2023 8:00 49 62 47 45
Saturday, May 27, 2023 9:00 48 65 47 45
Saturday, May 27, 2023 10:00 50 69 46 44
Saturday, May 27, 2023 11:00 50 70 49 44
Saturday, May 27, 2023 12:00 47 57 46 43
Saturday, May 27, 2023 13:00 50 64 46 43
Saturday, May 27, 2023 14:00 48 66 45 42
Saturday, May 27, 2023 15:00 48 65 46 43
Saturday, May 27, 2023 16:00 49 71 46 44
Saturday, May 27, 2023 17:00 51 72 48 46
Saturday, May 27, 2023 18:00 54 77 52 48
Saturday, May 27, 2023 19:00 52 63 51 48
Saturday, May 27, 2023 20:00 52 65 52 49
Saturday, May 27, 2023 21:00 53 75 52 49
Saturday, May 27, 2023 22:00 51 67 50 47
Saturday, May 27, 2023 23:00 50 68 48 45
Leq Lmax L50 L90
51 67 48 45
48 64 43 39
47 57 45 42
54 77 52 49
41 57 38 0
51 78 50 47
55 76
CNEL 55 Night % 24
Day Low
Day High
Night Low
Night High
Ldn Day %
Night Average
CAL200
(37.9453799, -121.7250931)
Saturday, May 27, 2023 Saturday, May 27, 2023
Statistics
Day Average
Appendix B2a: Continuous Noise Monitoring Results
Date Time
Measured Level, dBA Sand Creek Sports Complex
Eastern Project Boundary
LDL 820-6
58 60
78 57
60 64 65 64 62
65 69 70
57 64
66 65
71 72
77 63 65
75 67 68
38 35 34 34 35
38 44
47 45 45 44 44 43 43 42 43 44
46 48 48 49 49
47 45
43 41
50 42 43
47 49
52 49 48 50 50
47 50 48 48 49
51 54
52 52 53 51 50
25 35
45 55
65 75
85 95
Measured Hourly Noise Levels, dBA
Time of Day
Measured Ambient Noise Levels vs. Time of Day
Lmax L90 Leq
Noise Measurement Site
LT-2
Sand Creek Rd
Fairview Ave

Page 410 of 777 ends

Site: LT-2
Project: Meter:

Leq Lmax L50 L90 Location: Calibrator:

Sunday, May 28, 2023 0:00 52 75 47 41 Coordinates:

Sunday, May 28, 2023 1:00 47 63 45 38
Sunday, May 28, 2023 2:00 44 55 42 36
Sunday, May 28, 2023 3:00 43 57 40 33
Sunday, May 28, 2023 4:00 43 55 40 34
Sunday, May 28, 2023 5:00 46 69 43 37
Sunday, May 28, 2023 6:00 48 64 46 41
Sunday, May 28, 2023 7:00 49 63 48 46
Sunday, May 28, 2023 8:00 51 71 49 46
Sunday, May 28, 2023 9:00 45 60 44 41
Sunday, May 28, 2023 10:00 46 65 44 41
Sunday, May 28, 2023 11:00 46 57 44 42
Sunday, May 28, 2023 12:00 45 61 44 41
Sunday, May 28, 2023 13:00 46 63 43 41
Sunday, May 28, 2023 14:00 46 70 43 40
Sunday, May 28, 2023 15:00 47 69 43 39
Sunday, May 28, 2023 16:00 51 74 49 43
Sunday, May 28, 2023 17:00 53 69 52 49
Sunday, May 28, 2023 18:00 52 73 51 48
Sunday, May 28, 2023 19:00 58 80 52 48
Sunday, May 28, 2023 20:00 52 75 50 47
Sunday, May 28, 2023 21:00 53 79 49 45
Sunday, May 28, 2023 22:00 48 61 47 42
Sunday, May 28, 2023 23:00 45 56 44 40
Leq Lmax L50 L90
51 69 47 44
47 62 44 38
45 57 43 39
58 80 52 49
43 55 40 0
52 75 47 42
54 81
CNEL 56 Night % 19
Day Low
Day High
Night Low
Night High
Ldn Day %
Night Average
CAL200
(37.9453799, -121.7250931)
Sunday, May 28, 2023 Sunday, May 28, 2023
Statistics
Day Average
Appendix B2a: Continuous Noise Monitoring Results
Date Time
Measured Level, dBA Sand Creek Sports Complex
Eastern Project Boundary
LDL 820-6
75 63
55 57
55 69
64 63
71 60
65 57
61 63
70 69
74 69
73 80
75 79
61 56
41 38
36 33 34
37 41
46 46
41 41 42 41 41 40 39
43 49 48 48 47 45
42 40
52 47
44 43 43
46 48 49 51
45 46 46 45 46 46 47
51 53 52
58 52 53
48 45
25 35
45 55
65 75
85 95
Measured Hourly Noise Levels, dBA
Time of Day
Measured Ambient Noise Levels vs. Time of Day
Lmax L90 Leq
Noise Measurement Site
LT-2
Sand Creek Rd
Fairview Ave

Page 411 of 777 ends

Site: LT-2
Project: Meter:

Leq Lmax L50 L90 Location: Calibrator:

Monday, May 29, 2023 0:00 44 62 41 34 Coordinates:

Monday, May 29, 2023 1:00 43 60 38 33
Monday, May 29, 2023 2:00 43 62 40 33
Monday, May 29, 2023 3:00 46 70 42 37
Monday, May 29, 2023 4:00 49 63 48 42
Monday, May 29, 2023 5:00 52 68 50 46
Monday, May 29, 2023 6:00 53 69 52 48
Monday, May 29, 2023 7:00 56 68 55 52
Monday, May 29, 2023 8:00 56 64 55 51
Monday, May 29, 2023 9:00 47 72 45 42
Monday, May 29, 2023 10:00 45 70 42 39
Monday, May 29, 2023 11:00 46 74 42 39
Monday, May 29, 2023 12:00 47 73 43 40
Monday, May 29, 2023 13:00 46 64 43 40
Monday, May 29, 2023 14:00 47 72 44 41
Monday, May 29, 2023 15:00 45 62 44 41
Monday, May 29, 2023 16:00 51 68 49 46
Monday, May 29, 2023 17:00 52 64 52 48
Monday, May 29, 2023 18:00 53 72 51 49
Monday, May 29, 2023 19:00 56 79 52 49
Monday, May 29, 2023 20:00 52 64 51 48
Monday, May 29, 2023 21:00 53 72 50 47
Monday, May 29, 2023 22:00 49 68 47 43
Monday, May 29, 2023 23:00 49 67 47 43
Leq Lmax L50 L90
52 69 48 45
49 65 45 40
45 62 42 39
56 79 55 52
43 60 38 0
53 70 52 48
56 77
CNEL 57 Night % 23
Day Low
Day High
Night Low
Night High
Ldn Day %
Night Average
CAL200
(37.9453799, -121.7250931)
Monday, May 29, 2023 Monday, May 29, 2023
Statistics
Day Average
Appendix B2a: Continuous Noise Monitoring Results
Date Time
Measured Level, dBA Sand Creek Sports Complex
Eastern Project Boundary
LDL 820-6
62 60
62 70
63 68 69 68
64 72
70 74 73
64 72
62 68
64 72
79 64
72 68 67
34 33 33
37 42
46 48
52 51
42 39 39 40 40 41 41
46 48 49 49 48 47
43 43
44 43 43
46 49
52 53
56 56
47 45 46 47 46 47 45
51 52 53
56 52 53
49 49
25 35
45 55
65 75
85 95
Measured Hourly Noise Levels, dBA
Time of Day
Measured Ambient Noise Levels vs. Time of Day
Lmax L90 Leq
Noise Measurement Site
LT-2
Sand Creek Rd
Fairview Ave

Page 412 of 777 ends

Appendix C: Traffic Noise Calculation
Inputs and Results

Page 413 of 777 ends

Project #:

Description:

Ldn/CNEL: Ldn
Hard/Soft: Soft
60 dBA
65 dBA
70 dBA
Level,
dBA
1 Sand Creek Road East of Linden St. 20,800 93 0 7 1.0% 1.0% 45 300 -5 188 87 41 52.0 2 Sand Creek Road West of Linden St. 20,860 93 0 7 1.0% 1.0% 45 80 -5 189 88 41 60.6 3 Fairview Ave North of Sand Creek Rd. 10,930 93 0 7 1.0% 1.0% 35 115 0 82 38 18 57.8 4 Sand Creek Road East of Fairvew Ave. 20,860 93 0 7 1.0% 1.0% 45 75 -5 189 88 41 61.0 5 Fairview Ave South of Sand Creek Rd. 6,590 93 0 7 1.0% 1.0% 45 75 -5 87 41 19 56.0 6 Sand Creek Road West of West Prj. Dwy 20,800 93 0 7 1.0% 1.0% 45 100 -5 188 87 41 59.1 19 0 0 0 0 0 0.0% 0.0% 0 0 0
20 0 0 0 0 0 0.0% 0.0% 0 0 0
21 0 0 0 0 0 0.0% 0.0% 0 0 0
22 0 0 0 0 0 0.0% 0.0% 0 0 0
23 0 0 0 0 0 0.0% 0.0% 0 0 0
24 0 0 0 0 0 0.0% 0.0% 0 0 0
25 0 0 0 0 0 0.0% 0.0% 0 0 0
26 0 0 0 0 0 0.0% 0.0% 0 0 0
27 0 0 0 0 0 0.0% 0.0% 0 0 0
28 0 0 0 0 0 0.0% 0.0% 0 0 0
Appendix C-1
230505
FHWA-RD-77-108 Highway Traffic Noise Prediction Model
Sand Creek Sports Complex - Existing
Contours (ft.) - No
Offset
Offset
Speed Distance (dB)
% Hvy.

Trucks
% Med.

Trucks
Night
%
Eve
%
Day
Segment Roadway Segment ADT %

Page 414 of 777 ends

Project #:

Description:

Ldn/CNEL: Ldn
Hard/Soft: Soft
60 dBA
65 dBA
70 dBA
Level,
dBA
1 Sand Creek Road East of Linden St. 21,220 93 0 7 1.0% 1.0% 45 300 -5 191 89 41 52.1 2 Sand Creek Road West of Linden St. 21,450 93 0 7 1.0% 1.0% 45 80 -5 192 89 41 60.7 3 Fairview Ave North of Sand Creek Rd. 11,160 93 0 7 1.0% 1.0% 35 115 0 83 38 18 57.8 4 Sand Creek Road East of Fairvew Ave. 21,450 93 0 7 1.0% 1.0% 45 75 -5 192 89 41 61.1 5 Fairview Ave South of Sand Creek Rd. 6,710 93 0 7 1.0% 1.0% 45 75 -5 89 41 19 56.1 6 Sand Creek Road West of West Prj. Dwy 21,220 93 0 7 1.0% 1.0% 45 100 -5 191 89 41 59.2 19 0 0 0 0 0 0.0% 0.0% 0 0 0
20 0 0 0 0 0 0.0% 0.0% 0 0 0
21 0 0 0 0 0 0.0% 0.0% 0 0 0
22 0 0 0 0 0 0.0% 0.0% 0 0 0
23 0 0 0 0 0 0.0% 0.0% 0 0 0
24 0 0 0 0 0 0.0% 0.0% 0 0 0
25 0 0 0 0 0 0.0% 0.0% 0 0 0
26 0 0 0 0 0 0.0% 0.0% 0 0 0
27 0 0 0 0 0 0.0% 0.0% 0 0 0
28 0 0 0 0 0 0.0% 0.0% 0 0 0
Segment Roadway Segment ADT
Day
%
Appendix C-2
FHWA-RD-77-108 Highway Traffic Noise Prediction Model
230505
Sand Creek Sports Complex - Existing Plus Project
Offset
(dB)
Contours (ft.) - No
Offset
Eve
%
Night
%
% Med.

Trucks
% Hvy.

Trucks Speed Distance

Page 415 of 777 ends

Project #:

Description:

Ldn/CNEL: Ldn
Hard/Soft: Soft
60 dBA
65 dBA
70 dBA
Level,
dBA
1 Sand Creek Road East of Linden St. 28,770 93 0 7 1.0% 1.0% 45 300 -5 234 108 50 53.4 2 Sand Creek Road West of Linden St. 28,880 93 0 7 1.0% 1.0% 45 80 -5 234 109 50 62.0 3 Fairview Ave North of Sand Creek Rd. 14,040 93 0 7 1.0% 1.0% 35 115 0 96 45 21 58.8 4 Sand Creek Road East of Fairvew Ave. 28,880 93 0 7 1.0% 1.0% 45 75 -5 234 109 50 62.4 5 Fairview Ave South of Sand Creek Rd. 8,400 93 0 7 1.0% 1.0% 45 75 -5 103 48 22 57.1 6 Sand Creek Road West of West Prj. Dwy 28,770 93 0 7 1.0% 1.0% 45 100 -5 234 108 50 60.5 19 0 0 0 0 0 0.0% 0.0% 0 0 0
20 0 0 0 0 0 0.0% 0.0% 0 0 0
21 0 0 0 0 0 0.0% 0.0% 0 0 0
22 0 0 0 0 0 0.0% 0.0% 0 0 0
23 0 0 0 0 0 0.0% 0.0% 0 0 0
24 0 0 0 0 0 0.0% 0.0% 0 0 0
25 0 0 0 0 0 0.0% 0.0% 0 0 0
26 0 0 0 0 0 0.0% 0.0% 0 0 0
27 0 0 0 0 0 0.0% 0.0% 0 0 0
28 0 0 0 0 0 0.0% 0.0% 0 0 0
Segment Roadway Segment ADT
Day
%
Appendix C-3
FHWA-RD-77-108 Highway Traffic Noise Prediction Model
230505
Sand Creek Sports Complex - Cumulative
Offset
(dB)
Contours (ft.) - No
Offset
Eve
%
Night
%
% Med.

Trucks
% Hvy.

Trucks Speed Distance

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Project #:

Description:

Ldn/CNEL: Ldn
Hard/Soft: Soft
60 dBA
65 dBA
70 dBA
Level,
dBA
1 Sand Creek Road East of Linden St. 29,190 93 0 7 1.0% 1.0% 45 300 -5 236 110 51 53.4 2 Sand Creek Road West of Linden St. 29,470 93 0 7 1.0% 1.0% 45 80 -5 237 110 51 62.1 3 Fairview Ave North of Sand Creek Rd. 14,270 93 0 7 1.0% 1.0% 35 115 0 97 45 21 58.9 4 Sand Creek Road East of Fairvew Ave. 29,470 93 0 7 1.0% 1.0% 45 75 -5 237 110 51 62.5 5 Fairview Ave South of Sand Creek Rd. 8,520 93 0 7 1.0% 1.0% 45 75 -5 104 48 22 57.1 6 Sand Creek Road West of West Prj. Dwy 29,190 93 0 7 1.0% 1.0% 45 100 -5 236 110 51 60.6 19 0 0 0 0 0 0.0% 0.0% 0 0 0
20 0 0 0 0 0 0.0% 0.0% 0 0 0
21 0 0 0 0 0 0.0% 0.0% 0 0 0
22 0 0 0 0 0 0.0% 0.0% 0 0 0
23 0 0 0 0 0 0.0% 0.0% 0 0 0
24 0 0 0 0 0 0.0% 0.0% 0 0 0
25 0 0 0 0 0 0.0% 0.0% 0 0 0
26 0 0 0 0 0 0.0% 0.0% 0 0 0
27 0 0 0 0 0 0.0% 0.0% 0 0 0
28 0 0 0 0 0 0.0% 0.0% 0 0 0
Segment Roadway Segment ADT
Day
%
Appendix C-4
FHWA-RD-77-108 Highway Traffic Noise Prediction Model
230505
Sand Creek Sports Complex - Cumulative Plus Project
Offset
(dB)
Contours (ft.) - No
Offset
Eve
%
Night
%
% Med.

Trucks
% Hvy.

Trucks Speed Distance

Page 417 of 777 ends

Sand Creek Sports Complex Project 1
Mitigation Monitoring and Reporting Program July 2024
Sand Creek Sports Complex Project
Mitigation Monitoring and Reporting Program
July 2024
The California Environmental Quality Act (CEQA) and CEQA Guidelines require Lead Agencies to adopt a program for monitoring the mitigation measures required to avoid the significant environmental impacts of a project. The Mitigation Monitoring and Reporting Program (MMRP) ensures that mitigation measures imposed by the City are completed at the appropriate time in the development process.

The mitigation measures identified in the Initial Study/Mitigated Negative Declaration for the Sand Creek Sports Complex Project are listed in the MMRP, along with the party responsible for monitoring implementation of the mitigation measure, the milestones for implementation and monitoring, and a sign-off that the mitigation measure has been implemented.

Page 418 of 777 ends

Sand Creek Sports Complex Project 2
Mitigation Monitoring and Reporting Program May 2024
Mitigation Monitoring and Reporting Program
Sand Creek Sports Complex Project
Timing of Verification
Measure
Complete?
(check) Mitigation Measures
Responsibility
(Implementation)
Responsibility
(Monitoring)
IV. Biological Resources
Prior to the issuance of
grading or construction
permits for the project site
Prior to any ground
disturbance related to
covered activities
Mitigation Measure IV-1. Prior to the issuance of grading or construction permits for the project site, an application and obtain coverage under the ECCC HCP/NCCP shall be
submitted to the East Contra Costa County Conservancy.

Obtaining coverage shall include payment of the applicable ECCC HCP/NCCP per acre fee in effect for Zone I in
compliance with Section 16.168.070 of the Brentwood
Municipal Code. The contractor shall receive a Certificate of Coverage from the City of Brentwood and submit a
construction monitoring report to the ECCC Habitat
Conservancy for review and approval. The Certificate of Coverage will confirm the fee has been received, that other ECCC HCP/NCCP requirements have been met or will be
performed, and will authorize take of covered species.

Western Burrowing Owl
Mitigation Measure IV-2(a). Prior to any ground disturbance related to covered activities, a USFWS/CDFW-approved
biologist shall conduct a preconstruction survey in areas identified in the planning surveys completed for the proposed project as having potential burrowing owl habitat. The
preconstruction surveys shall establish the presence or absence of western burrowing owl and/or habitat features and evaluate use by owls, in accordance with CDFW survey
guidelines.

On areas where activities are proposed, the biologist shall survey the proposed disturbance footprint and a 500-foot radius from the perimeter of the proposed footprint to identify burrows and owls. Adjacent parcels under different land ownership shall not be surveyed. Surveys shall take place near sunrise or sunset, in accordance with CDFW guidelines.

All burrows or burrowing owls shall be identified and mapped.

Project Contractor
Qualified Biologist
Community
Development
Department
East Contra Costa
County Habitat
Conservancy
Community
Development
Department

Page 419 of 777 ends

Sand Creek Sports Complex Project 3
Mitigation Monitoring and Reporting Program July 2024
Mitigation Monitoring and Reporting Program
Sand Creek Sports Complex Project
Timing of Verification
Measure
Complete?
(check) Mitigation Measures
Responsibility
(Implementation)
Responsibility
(Monitoring)
During construction
activities if burrowing owls
are found during the
breeding season (February
1 to August 31)
Surveys shall take place, at most, 30 days prior to
construction. During the breeding season (February 1 to August 31), surveys shall document whether burrowing owls are nesting in or directly adjacent to disturbance areas. During the nonbreeding season (September 1 to January 31),
surveys shall document whether burrowing owls are using habitat in or directly adjacent to any disturbance area. Survey results shall be valid only for the season (breeding or nonbreeding) during which the survey is conducted. A report detailing the methodology and results of the survey shall be submitted for review and approval to the City of Brentwood Community Development Department.

Mitigation Measure IV-2(b). If burrowing owls are found during the breeding season (February 1 to August 31), in accordance with the CDFW’s Staff Report on Burrowing Owl Mitigation, the contractor shall avoid all nest sites that could be disturbed by project construction during the remainder of the breeding season or while the nest is occupied by adults or young. Avoidance shall include establishment of a nondisturbance buffer zone (as described below). Construction may occur during the breeding season if a qualified biologist monitors the nest and determines that the birds have not begun egg-laying and incubation or that the juveniles from the occupied burrows have fledged. During the nonbreeding
season (September 1 to January 31), the contractor shall avoid the owls and the burrows they are using, if possible.

Avoidance shall include the establishment of a buffer zone (as described below).

During the breeding season, buffer zones of at least 250 feet in which construction activities cannot occur shall be
established around each occupied burrow (nest site). Buffer zones of 160 feet shall be established around each burrow being used during the nonbreeding season. The buffers shall Qualified Biologist
Project Contractor
Community
Development
Department

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Sand Creek Sports Complex Project 4
Mitigation Monitoring and Reporting Program July 2024
Mitigation Monitoring and Reporting Program
Sand Creek Sports Complex Project
Timing of Verification
Measure
Complete?
(check) Mitigation Measures
Responsibility
(Implementation)
Responsibility
(Monitoring)
Prior to any ground
disturbance related to
covered activities
During construction
activities related to covered
activities
be delineated by highly visible, temporary construction fencing.

If occupied burrows for burrowing owls are not avoided, passive relocation shall be implemented. Owls shall be
excluded from burrows in the immediate impact zone and
within a 160-foot buffer zone by installing one-way doors in burrow entrances. The doors shall be in place for 48 hours, prior to excavation. The project area shall be monitored daily for one week to confirm that the owl has abandoned the
burrow. Whenever possible, burrows shall be excavated using hand tools and refilled to prevent reoccupation. Plastic tubing or a similar structure shall be inserted in the tunnels during excavation to maintain an escape route for any owls inside the burrow. A report detailing compliance with the provisions established herein shall be submitted for review and approval to the City of Brentwood Community Development
Department.

Giant Garter Snake
Mitigation Measure IV-3(a). Prior to any ground disturbance related to covered activities, a USFWS/CDFW–approved
biologist shall conduct a preconstruction survey in areas identified in the planning surveys as having suitable garter snake habitat and 200 feet of adjacent uplands, measured from the outer edge of each bank. The surveys shall delineat e suitable habitat and document any sightings of giant garter snake.

Mitigation Measure IV-3(b). To the maximum extent
practicable, impacts on giant garter snake habitat as a result of covered activities shall be avoided. If feasible, in areas near construction activities, a buffer of 200 feet from suitable habitat shall be delineated within which vegetation disturbance or use Qualified Biologist
Project Contractor
Community
Development
Department
Community
Development
Department
USFWS

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Sand Creek Sports Complex Project 5
Mitigation Monitoring and Reporting Program July 2024
Mitigation Monitoring and Reporting Program
Sand Creek Sports Complex Project
Timing of Verification
Measure
Complete?
(check) Mitigation Measures
Responsibility
(Implementation)
Responsibility
(Monitoring)
During construction
activities if suitable habitat
for giant garter snake
cannot be avoided between
October 1 and April 30
of heavy equipment is prohibited.

If impacts on giant garter snake habitat as a result of covered activities are not avoided, the following measures shall be implemented. These measures are based on USFWS’s
Standard Avoidance and Minimization Measures during
Construction Activities in Giant Garter Snake Habitat (U.S.

Fish and Wildlife Service 1999).
 Limit construction activity that disturbs habitat to the period between May 1 and September 30. This is the
active period for giant garter snake, and direct mortality is minimized because snakes are more likely to
independently move away from disturbed area. If
activities are necessary in giant garter snake habitat
between October 1 and April 30, the USFWS
Sacramento Field Office shall be contacted to
determine if additional measures beyond those
described below are necessary to minimize and avoid
take.
 In areas where construction is to take place, dewater all irrigation ditches, canals or other aquatic habitat
between April 15 and September 30 to remove habitat
of garter snakes. Dewatered areas must remain dry,
with no puddled water remaining, for at least 15
consecutive days prior to the excavation or filling of that habitat. If a site cannot be completely dewatered,
netting and salvage of prey items may be necessary.

Mitigation Measure IV-3(c). If suitable habitat for giant garter snake cannot be avoided between October 1 and April 30 the USFWS Sacramento Field Office shall be contacted to
determine if additional measures beyond those described below are necessary, and the following actions will be
performed. A USFWS-approved biologist shall conduct a
construction survey no more than 24 hours before
Qualified Biologist Community
Development
Department
USFWS

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Sand Creek Sports Complex Project 6
Mitigation Monitoring and Reporting Program July 2024
Mitigation Monitoring and Reporting Program
Sand Creek Sports Complex Project
Timing of Verification
Measure
Complete?
(check) Mitigation Measures
Responsibility
(Implementation)
Responsibility
(Monitoring)
construction in suitable habitat and shall be on site during construction activities in potential aquatic and upland habitat to ensure that individuals of giant garter snake encountered during construction will be avoided. The biologist shall provide USFWS with a field report form documenting the monitoring efforts within 24 hours of commencement of construction activities. The monitor shall be available thereafter. If a snake is encountered during construction activities, the monitor shall have the authority to stop construction activities until appropriate corrective measures have been completed or it is determined that the snake will not be harmed. Giant garter snakes encountered during construction activities should be allowed to move away from the construction area on their own.

Only personnel with a USFWS recovery permit pursuant to Section 10(a)(1)(A) of the ESA will have the authority to capture and/or relocate giant garter snakes that are
encountered in the construction area. The project area will be reinspected whenever a lapse in construction activity of 2 weeks or more has occurred.

To ensure that construction equipment and personnel do not affect nearby aquatic habitat for giant garter snake outside construction areas, silt fencing shall be erected to clearly define the aquatic habitat to be avoided; restrict working areas, spoils, and equipment storage and other project
activities to areas outside of aquatic or wetland habitat; and maintain water quality and limit construction runoff into wetland areas through the use of fiber bales, filter fences, vegetation buffer strips, or other appropriate methods.

Fill or construction debris may be used by giant garter snakes as over-wintering sites. Therefore, upon completion of
construction activities, any temporary fill or construction debris must be removed from the site.

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Sand Creek Sports Complex Project 7
Mitigation Monitoring and Reporting Program July 2024
Mitigation Monitoring and Reporting Program
Sand Creek Sports Complex Project
Timing of Verification
Measure
Complete?
(check) Mitigation Measures
Responsibility
(Implementation)
Responsibility
(Monitoring)
Prior to any ground
disturbance related to
covered activities during the
nesting season (March 15
to September 15)
Prior to any ground
disturbance related to
covered activities during the
nesting season (March 15
to September 15)
Construction personnel shall be trained to avoid harming giant garter snakes. A qualified biologist approved by USFWS will inform all construction personnel about the life history of giant garter snakes; the importance of irrigation canals,
marshes/wetlands, and seasonally flooded areas such as rice fields to giant garter snakes; and the terms and conditions of the Plan related to avoiding and minimizing impacts on giant garter snake.

Migratory Birds
Mitigation Measure IV-4(a). Prior to any ground disturbance related to covered activities during the nesting season (March 15-September 15), a qualified biologist shall conduct a preconstruction survey no more than 30 days prior to
construction in order to establish whether occupied migratory bird and/or raptor nests are located within 250 feet of the project site. A written summary of the survey results shall be submitted to the City of Brentwood Community Development Department. If occupied nests occur on-site or within 250 feet of the project site, then Mitigation Measure IV-4(b) shall be implemented. If occupied nests are not found, further
mitigation is not necessary.

Mitigation Measure IV-4(b). During the nesting season
(March 15-September 15), covered activities within 250 feet of occupied nests or nests under construction shall be prohibited to prevent nest abandonment. If site-specific conditions, or the nature of the covered activity (e.g., dense vegetation, limited activities) indicate that a smaller buffer could be used, the City of Brentwood may coordinate with CDFW/USFWS to
determine the appropriate buffer size. If young fledge prior to September 15, covered activities can proceed normally.

Qualified Biologist
Project Contractor
Community
Development
Department
Community
Development
Department
CDFW
USFWS

Page 424 of 777 ends

Sand Creek Sports Complex Project 8
Mitigation Monitoring and Reporting Program July 2024
Mitigation Monitoring and Reporting Program
Sand Creek Sports Complex Project
Timing of Verification
Measure
Complete?
(check) Mitigation Measures
Responsibility
(Implementation)
Responsibility
(Monitoring)
V. Cultural Resources
Prior to grading permit
issuance
During construction
activities
Mitigation Measure V-1. Prior to grading permit issuance, the plans shall include a note requiring that a qualified
archaeologist conduct a Cultural Resources Worker
Environmental Awareness Program (WEAP) training for all personnel involved in ground-disturbing, site preparation construction activities on the project site prior to construction and ground-disturbing activities. The training shall include basic information about the types of artifacts that might be encountered during construction activities, and procedures to follow in the event of a discovery. The training shall be provided for any additional personnel added to the project even after the initiation of construction and ground disturbing activities.

Mitigation Measure V-2. During construction, if historic and/or cultural resources are encountered during site grading or other site work, all such work shall be halted immediately within 100 feet and the contractor shall immediately notify the Community Development Department of the discovery. In
such case, a qualified archaeological monitor shall be retained by the contractor, at its own expense, and shall evaluate any potentially important discovery. Significance determinations shall be measured in terms of criteria for inclusion on the California Register of Historical Resources (Title 14 CCR, §4852[a]), and the definition of tribal cultural resources set forth in Public Resources Code Section 21074. The
archaeologist shall be required to submit to the Community Development Department for review and approval a report of the findings and method of curation or protection of the resources. Comments on the report shall be submitted by the Native American tribes within 30 days of receipt of the report.

Further grading or site work within the area of discovery shall not be allowed until the preceding work has occurred.

Project Contractor
Qualified
Archaeologist
Project Contractor
Qualified
Archaeologist
Community
Development
Department
Community
Development
Department

Page 425 of 777 ends

Brentwood City CouncilAugust 13, 2024

Brentwood City Council
August 13, 2024