Watsonville City Council
March 14, 2023

4 P-B8-MW P-B8-MW-1.5 1.0 1.5 14.0 ND mg/kg
N 305.9 Urban
DP-9 DP-09-1.5 1.5 1.5 341.0 36.0 mg/kgN 306.5 Urban
DP-12 DP-12-1.5 1.5 1.5 253.0 21.7 mg/kg
N 307.7 Urban
P-B9A P-B9A-2.5 1.4 2.5 ND ND mg/kg
N 307.8 Urban
P-B9A P-B9A 1.4 1.4 10.0 21.0 mg/kg
N 307.8 Urban
DP-13 DP-13-1.5 1.5 1.5 55.0 7.8 mg/kg
N 310.0 Urban
A1-2 A1-2 0.5 1.0 5.2 17.3 mg/kgN 310.9 Urban
GP-15 GP-15 1.0 1.0 10.2 43.7 mg/kgN 314.5 Urban
GP-15 GP-15 1.5 1.5 8.4 46.9 mg/kg
N 314.5 Urban
P-3 P-3 0.0 0.5 49.0 94.0 mg/kgN 315.5 Urban
Y5e Y5-E2 0.2 0.2 4.7 340.0 mg/kgN 315.6 Urban
HA-4 HA-4-0.5 0.5 0.5 9.9 NA mg/kg
N 316.1 Urban
P-B11A P-B11A-2.2 0.9 2.2 ND 20.0 mg/kg
N 317.8 Urban
P-B11A P-B11A 0.9 0.9 70.0 25.0 mg/kgN 317.8 Urban
P-B10 P-B10 1.0 1.0 550.0 47.0 mg/kg
N 318.7 Urban
P-B10 P-B10-1.5 1.0 1.5 9.6 ND mg/kgN 318.7 Urban
P-2 P-2 0.0 0.5 13.0 69.0 mg/kgN 322.3 Urban
Y5d Y5-D2 0.2 0.2 5.8 250.0 mg/kg
N 322.5 Urban
A1-3 A1-3 0.5 1.0 5.3 14.2 mg/kg
N 324.9 Urban
HA-1SC HA-1SC-1 1.0 1.0 7.0 6.7 mg/kgN 327.5 Urban
DP-3 DP-3-1.5 1.5 1.5 4.4 40.4 mg/kg
N 330.1 Urban
GP-20 GP-20 0.5 0.5 12.7 29.6 mg/kgN 331.6 Urban
P-1 P-1 0.0 0.5 53.0 69.0 mg/kgN 332.3 Urban
HA-5 HA-5-0.5 0.5 0.5 55.0 NA mg/kg
N 337.9 Urban
DP-11 DP-11-1.5 1.5 1.5 5.4 4.6 mg/kg
N 341.1 Urban
Z38 Z38c 0.2 0.2 5.4 420.0 mg/kgN 341.4 Urban
E-24 E-24-0.5 0.0 0.5 12.0 43.0 mg/kg
N 345.5 Urban
E-11 E-11-0.5 0.0 0.5 3.4 42.0 mg/kg
N 345.6 Urban
HA-6 HA-6-0.5 0.5 0.5 40.0 NA mg/kgN 351.8 Urban
E-25 E-25-0.5 0.0 0.5 13.0 15.0 mg/kg
N 354.6 Urban
HA-9 HA-9 0.0 0.5 NA NA mg/kg
N 355.4 Urban
HA-9 HA-9 1.0 1.5 NA mg/kgN 355.4 Urban
HA-9 HA9 1.0 1.5 NA mg/kg
N 355.4 Urban
HA-8 HA-8-1 1.0 1.0 6.4 NA mg/kg
N 356.3 Urban
Z17 Z17c 0.2 0.2 10.0 370.0 mg/kgN 357.2 Urban
E-26 E-26-0.5 0.0 0.5 3.7 5.0 mg/kg
N 361.0 Urban
BG-13 BG-13 0.0 0.5 126.0 13.6 mg/kg BG 389.0 Urban
2B 2B-0.5 0.0 0.5 11.5 110.0 mg/kgN 405.4 Urban
Y3h Y3-H4 0.3 0.3 5.7 570.0 mg/kgN 420.2 Urban
E-34 E-34_0.5 0.0 0.5 3.7 130.0 mg/kgN 434.5 Urban
E-34 E-34-0.5_1 0.5 1.0 4.3 160.0 mg/kgN 434.5 Urban
Z25 Z25a 0.2 0.2 7.2 1400.0 mg/kgN 441.0 Urban
Y3g Y3-G2 0.2 0.2 5.5 370.0 mg/kgN 447.2 Urban
E-4 E-4-0.5 0.0 0.5 3.8 3.8 mg/kgN 450.8 Urban
Y11b Y11-B2 0.2 0.2 3.1 410.0 mg/kgN 478.6 Urban
Y10b Y10-B4 0.3 0.3 5.1 140.0 mg/kgN 483.4 Urban
E-33 E-33_0.5 0.0 0.5 7.7 37.0 mg/kgN 505.9 Urban
E-33 E-33-0.5_1 0.5 1.0 7.9 31.0 mg/kgN 505.9 Urban
S8-P24 40 West Lake Avenue 0.0 0.5 5.6 630.0 mg/kgN 514.8 Urban S4-P24 40 West Lake Avenue 0.0 0.5 3.8 24.0 mg/kgN 514.8 Urban S3-P24 40 West Lake Avenue 0.0 0.5 3.7 240.0 mg/kgN 514.8 Urban S5-P24 40 West Lake Avenue 0.0 0.5 2.6 13.0 mg/kgN 514.8 Urban S6-P24 40 West Lake Avenue 0.0 0.5 2.5 43.0 mg/kgN 514.8 Urban 3B 3B-0.5 0.0 0.5 5.6 477.0 mg/kgN 520.0 Urban
E-37 E-37_0.5 0.0 0.5 4.6 97.0 mg/kgN 526.4 Urban
E-37 E-37-0.5_1 0.5 1.0 5.1 100.0 mg/kgN 526.4 Urban
E-23 E-23-0.5 0.0 0.5 5.6 110.0 mg/kgN 530.8 Urban

5 D1-1 D1-1 0.5 1.0 13.4 1180.0 mg/kg
N 541.6 Urban
D1-2 D1-2 0.5 1.0 15.6 1840.0 mg/kgN 543.4 Urban
Z26 Z26c 0.2 0.2 3.6 720.0 mg/kg
N 554.1 Urban
D1-3 D1-3 0.5 1.0 22.0 958.0 mg/kg
N 555.3 Urban
S4-P27 524 Rodriguez Street 0.0 0.5 NA 16.0 mg/kg
N 558.0 Urban
S6-P27 524 Rodriguez Street 0.0 0.5 NA 360.0 mg/kg
N 558.0 Urban
S5-P27 524 Rodriguez Street 0.0 0.5 NA 400.0 mg/kgN 558.0 Urban E-5 E-5-B-0.5 0.0 0.5 8.3 480.0 mg/kgN 560.3 Urban
E-5 E-5-C-0.5 0.0 0.5 8.2 740.0 mg/kg
N 560.3 Urban
E-5 E-5-0.5 0.0 0.5 6.8 460.0 mg/kgN 560.3 Urban
West Lake & Rodriguez S5a-P25 0.0 1.0 14.0 mg/kgN 586.6 Urban West Lake & Rodriguez S7a-P24 0.0 0.5 26.0 mg/kg
N 586.6 Urban
West Lake & Rodriguez S4a-P23 0.0 0.5 31.0 mg/kg
N 586.6 Urban
West Lake & Rodriguez S3a-P31 0.0 0.5 48.0 mg/kgN 586.6 Urban West Lake & Rodriguez S4a-P26 0.0 0.5 50.0 mg/kg
N 586.6 Urban
West Lake & Rodriguez S2a-P27 0.0 0.5 93.0 mg/kgN 586.6 Urban West Lake & Rodriguez S3a-P26 0.0 0.5 100.0 mg/kgN 586.6 Urban West Lake & Rodriguez S4a-P30 0.0 0.5 210.0 mg/kg
N 586.6 Urban
West Lake & Rodriguez S5a-P30 0.0 0.5 220.0 mg/kg
N 586.6 Urban
West Lake & Rodriguez S4a-P31 0.0 0.5 230.0 mg/kgN 586.6 Urban West Lake & Rodriguez S6a-P30 0.0 0.5 250.0 mg/kg
N 586.6 Urban
West Lake & Rodriguez S5a-P26 0.0 0.5 270.0 mg/kgN 586.6 Urban West Lake & Rodriguez S3a-P23 0.0 0.5 280.0 mg/kgN 586.6 Urban West Lake & Rodriguez S2a-P23 0.0 0.5 300.0 mg/kg
N 586.6 Urban
West Lake & Rodriguez S3a-P27 0.0 0.5 360.0 mg/kg
N 586.6 Urban
West Lake & Rodriguez S2a-P28 0.0 0.5 400.0 mg/kgN 586.6 Urban West Lake & Rodriguez S4a-P25 0.0 0.5 400.0 mg/kg
N 586.6 Urban
West Lake & Rodriguez S2a-P23 split (S5a-P23) 0.0 0.5 440.0 mg/kg N 586.6 Urban
West Lake & Rodriguez S2a-P25 0.0 1.0 460.0 mg/kgN 586.6 Urban West Lake & Rodriguez S3a-P25 0.0 0.5 670.0 mg/kg
N 586.6 Urban
West Lake & Rodriguez S2a-P31 0.0 0.5 690.0 mg/kg
N 586.6 Urban
West Lake & Rodriguez S3a-P30 0.0 0.5 710.0 mg/kgN 586.6 Urban West Lake & Rodriguez S7a-P30 0.0 0.5 1400.0 mg/kg
N 586.6 Urban
West Lake & Rodriguez S1-P31 0.5 1.0 42.0 mg/kg
N 586.6 Urban
West Lake & Rodriguez S1-P28 0.5 1.0 85.0 mg/kgN 586.6 Urban West Lake & Rodriguez VS-SESW-P26a-2 0.5 0.5 140.0 mg/kg N 586.6 Urban
West Lake & Rodriguez VS-SWSW1-P26b 0.5 0.5 140.0 mg/kgN 586.6 Urban West Lake & Rodriguez VS-SWSW2-P26b 0.5 0.5 220.0 mg/kgN 586.6 Urban West Lake & Rodriguez S1-P25 0.5 1.0 250.0 mg/kgN 586.6 Urban West Lake & Rodriguez VS-SESW-P24 0.5 0.5 250.0 mg/kgN 586.6 Urban West Lake & Rodriguez VS-SWSW2-P26a 0.5 0.5 250.0 mg/kgN 586.6 Urban West Lake & Rodriguez S1-P23 0.5 1.0 290.0 mg/kgN 586.6 Urban West Lake & Rodriguez VS-NESW2-P24 0.5 0.5 320.0 mg/kgN 586.6 Urban West Lake & Rodriguez VS-SWSW1-P26a 0.5 0.5 320.0 mg/kgN 586.6 Urban West Lake & Rodriguez S1-P27 0.5 1.0 340.0 mg/kgN 586.6 Urban West Lake & Rodriguez VS-NESW1-P24 0.5 0.5 380.0 mg/kgN 586.6 Urban West Lake & Rodriguez VS-SESW-P26b 0.5 0.5 440.0 mg/kgN 586.6 Urban West Lake & Rodriguez VS-NWSW-P26a 0.5 0.5 520.0 mg/kgN 586.6 Urban West Lake & Rodriguez VS-NWSW-P24 0.5 0.5 570.0 mg/kgN 586.6 Urban West Lake & Rodriguez VS-NWSW-P26b 0.5 0.5 570.0 mg/kgN 586.6 Urban West Lake & Rodriguez S1-P30 0.5 1.0 700.0 mg/kgN 586.6 Urban West Lake & Rodriguez S1-P24 0.5 1.0 800.0 mg/kgN 586.6 Urban West Lake & Rodriguez S1-P26 0.5 1.0 1200.0 mg/kgN 586.6 Urban West Lake & Rodriguez VS-SESW-P26a 0.5 0.5 2000.0 mg/kgN 586.6 Urban West Lake & Rodriguez VS-SWSW-P30 0.8 1.3 100.0 mg/kgN 586.6 Urban West Lake & Rodriguez VS-SESW-P30 0.8 1.3 200.0 mg/kgN 586.6 Urban West Lake & Rodriguez VS-F2-P26a 1.0 1.5 9.9 mg/kgN 586.6 Urban

6 West Lake & Rodriguez VS-F1-P24 1.0 1.5 12.0 mg/kg
N 586.6 Urban
West Lake & Rodriguez VS-F2-P26b 1.0 1.5 12.0 mg/kgN 586.6 Urban West Lake & Rodriguez S3b-P25 1.0 1.5 14.0 mg/kg
N 586.6 Urban
West Lake & Rodriguez S2b-P25 1.0 1.5 19.0 mg/kg
N 586.6 Urban
West Lake & Rodriguez VS-F2-P24 1.0 1.5 25.0 mg/kg
N 586.6 Urban
West Lake & Rodriguez VS-F1-26b 1.0 1.5 27.0 mg/kg
N 586.6 Urban
West Lake & Rodriguez S2b-P31 1.0 1.5 28.0 mg/kgN 586.6 Urban West Lake & Rodriguez S3b-P30 1.0 1.5 37.0 mg/kgN 586.6 Urban West Lake & Rodriguez S7b-P-30 1.0 1.5 46.0 mg/kg
N 586.6 Urban
West Lake & Rodriguez VS-F1-P26a 1.0 1.5 78.0 mg/kgN 586.6 Urban West Lake & Rodriguez S2b-P23 1.0 1.5 100.0 mg/kgN 586.6 Urban West Lake & Rodriguez VS-NWSW-P30 1.3 1.8 380.0 mg/kg
N 586.6 Urban
West Lake & Rodriguez S2-P26 1.5 2.0 31.0 mg/kg
N 586.6 Urban
West Lake & Rodriguez S2-P24 1.5 2.0 34.0 mg/kgN 586.6 Urban West Lake & Rodriguez S2-P30 1.5 2.0 780.0 mg/kg
N 586.6 Urban
C1-1 C1-1 0.5 1.0 3.2 45.5 mg/kgN 587.3 Urban
E-41 E-41_0.5 0.0 0.5 6.4 300.0 mg/kgN 593.4 Urban
E-41 E-41-0.5_1 0.5 1.0 5.2 95.0 mg/kg
N 593.4 Urban
Z30 Z30b 0.2 0.2 9.5 170.0 mg/kg
N 597.9 Urban
Y9c Y9-C6 0.5 0.5 8.7 310.0 mg/kgN 605.6 Urban
E-14 E-14-0.5 0.0 0.5 3.7 100.0 mg/kg
N 606.0 Urban
E-40 E-40_0.5 0.0 0.5 5.4 76.0 mg/kgN 628.6 Urban
E-40 E-40-0.5_1 0.5 1.0 9.1 73.0 mg/kgN 628.6 Urban
BG-12 BG-12 0.0 0.5 5.0 30.8 mg/kg BG 644.2 Urban
C1-2 C1-2 0.5 1.0 2.1 34.6 mg/kg
N 645.6 Urban
C1-3 C1-3 0.5 1.0 2.2 35.9 mg/kgN 650.2 Urban
E-17 E-17-B-0.5 0.0 0.5 5.5 480.0 mg/kg
N 675.6 Urban
E-17 E-17-0.5 0.0 0.5 4.1 200.0 mg/kg
N 675.6 Urban
5B 5B-0.5 0.0 0.5 8.1 mg/kgN 748.1 Urban
5B 5B-1.5 1.0 1.5 11.5 mg/kg
N 748.1 Urban
E-3 E-3-0.5 0.0 0.5 9.9 16.0 mg/kg
N 761.3 Urban
Z22 Z22c 0.2 0.2 10.0 1700.0 mg/kgN 771.8 Urban
8B 8B-0.5 0.0 0.5 7.5 mg/kg
N 780.2 Urban
8B 8B-1.5 1.0 1.5 6.7 mg/kg
N 780.2 Urban
DSS-WAT1-9 DSS-WAT1-9-0.5 0.0 0.5 1.5 142.0 mg/kgN 788.4 Urban D2-3 D2-3 0.5 1.0 4.0 120.0 mg/kg
N 792.8 Urban
D2-2 D2-2 0.5 1.0 5.6 134.0 mg/kgN 797.8 Urban
D2-1 D2-1 0.5 1.0 3.0 60.6 mg/kgN 805.0 Urban
DSS-WAT1-4 DSS-WAT1-4-0.5 0.0 0.5 2.2 26.4 mg/kgN 810.3 Urban E-31 E-31_0.5 0.0 0.5 7.8 80.0 mg/kgN 824.5 Urban
E-31 E-31-0.5_1 0.5 1.0 10.0 61.0 mg/kgN 824.5 Urban
618 Main Street DSS-WAT1-3-0 0.0 0.0 10.3 mg/kgN 825.7 Urban 618 Main Street DSS-WAT1-2-0 0.0 0.0 8.8 mg/kgN 825.7 Urban 618 Main Street DSS-WAT1-5-0 0.0 0.0 4.6 mg/kgN 825.7 Urban 618 Main Street DSS-WAT1-4-0 0.0 0.0 2.2 mg/kgN 825.7 Urban 618 Main Street DSS-WAT1-1-0 0.0 0.0 0.8 mg/kgN 825.7 Urban 618 Main Street SS-WAT1-2-1 1.0 1.0 10.0 mg/kgN 825.7 Urban 618 Main Street SS-WAT1-9-1 1.0 1.0 8.0 mg/kgN 825.7 Urban 618 Main Street SS-WAT1-3-1 1.0 1.0 7.2 mg/kgN 825.7 Urban 618 Main Street SS-WAT1-7-1 1.0 1.0 4.6 mg/kgN 825.7 Urban 618 Main Street SS-WAT1-5-1 1.0 1.0 4.5 mg/kgN 825.7 Urban 618 Main Street SS-WAT1-4-1 1.0 1.0 4.1 mg/kgN 825.7 Urban 618 Main Street SS-WAT1-8-1 1.0 1.0 3.0 mg/kgN 825.7 Urban 618 Main Street SS_WAT1-1-1 1.0 1.0 2.7 mg/kgN 825.7 Urban 618 Main Street SS-WAT1-6-1 1.0 1.0 2.7 mg/kgN 825.7 Urban DSS-WAT1-2 DSS-WAT1-2-0.5 0.0 0.5 8.8 83.3 mg/kgN 828.2 Urban DSS-WAT1-5 DSS-WAT1-5-0.5 0.0 0.5 4.6 44.9 mg/kgN 832.8 Urban

7 SS-WAT1-2 SS-WAT1-2 1.0 1.0 10.0 NA mg/kg
N 835.2 Urban
SS-WAT1-9 SS-WAT1-9 1.0 1.0 8.0 NA mg/kgN 835.2 Urban
SS-WAT1-3 SS-WAT1-3 1.0 1.0 7.2 NA mg/kg
N 835.2 Urban
SS-WAT1-7 SS-WAT1-7 1.0 1.0 4.6 NA mg/kg
N 835.2 Urban
SS-WAT1-5 SS-WAT1-5 1.0 1.0 4.5 NA mg/kg
N 835.2 Urban
SS-WAT1-4 SS-WAT1-4 1.0 1.0 4.1 NA mg/kg
N 835.2 Urban
SS-WAT1-8 SS-WAT1-8 1.0 1.0 3.0 NA mg/kgN 835.2 Urban
SS-WAT1-1 SS-WAT1-1 1.0 1.0 2.7 NA mg/kgN 835.2 Urban
SS-WAT1-6 SS-WAT1-6 1.0 1.0 2.7 NA mg/kg
N 835.2 Urban
E-12 E-12-0.5 0.0 0.5 4.8 48.0 mg/kgN 838.3 Urban
DSS-WAT1-6 DSS-WAT1-6-0.5 0.0 0.5 2.0 75.2 mg/kgN 844.7 Urban DSS-WAT1-8 DSS-WAT1-8-0.5 0.0 0.5 27.0 192.0 mg/kg
N 848.2 Urban
DSS-WAT1-1 DSS-WAT1-1-0.5 0.0 0.5 0.8 ND mg/kg
N 850.4 Urban
DSS-WAT1-3 DSS-WAT1-3-0.5 0.0 0.5 10.3 106.0 mg/kgN 855.8 Urban E-6 E-6-0.5 0.0 0.5 5.7 78.0 mg/kg
N 857.3 Urban
DSS-WAT1-7 DSS-WAT1-7-0.5 0.0 0.5 1.5 73.7 mg/kgN 857.5 Urban E-8 E-8-0.5 0.0 0.5 6.6 180.0 mg/kgN 867.9 Urban
DSS-WAT1-10 DSS-WAT1-10-0.5 0.0 0.5 1.3 32.4 mg/kg
N 868.5 Urban
E-13 E-13-0.5 0.0 0.5 5.6 60.0 mg/kg
N 872.5 Urban
7B 7B-0.5 0.0 0.5 7.5 mg/kgN 876.7 Urban
7B 7B-1.5 1.0 1.5 12.5 mg/kg
N 876.7 Urban
E-15 E-15-C-EB-0.5 0.0 0.5 ND mg/kgN 884.5 Urban
E-15 E-15-0.5 0.0 0.5 20.0 68.0 mg/kgN 884.5 Urban
E-15 E-15-B-0.5 0.0 0.5 5.8 69.0 mg/kg
N 884.5 Urban
E-15 E-15-C-FD-0.5 0.0 0.5 3.5 4.7 mg/kg
N 884.5 Urban
E-15 E-15-C-0.5 0.0 0.5 2.1 3.5 mg/kgN 884.5 Urban
E-9 E-9-C-0.5 0.0 0.5 3.0 41.0 mg/kg
N 891.4 Urban
E-9 E-9-0.5 0.0 0.5 2.6 32.0 mg/kg
N 891.4 Urban
E-9 E-9-B-0.5 0.0 0.5 2.6 34.0 mg/kgN 891.4 Urban
E-38 E-38_0.5 0.0 0.5 4.3 110.0 mg/kg
N 905.4 Urban
E-38 E-38-0.5_1 0.5 1.0 3.8 62.0 mg/kg
N 905.4 Urban
BG-14 BG-14 0.0 0.5 6.5 10.7 mg/kg BG 920.5 Urban
BG-9 BG-9 0.0 0.5 10.5 109.0 mg/kg BG 1006.9 Urban
9B 9B-0.5 0.0 0.5 3.1 mg/kg
N 1018.1 Urban
9B 9B-1.5 1.0 1.5 3.2 mg/kgN 1018.1 Urban
BG-11 BG-11 0.0 0.5 2.2 48.9 mg/kg BG 1024.9 Urban
BG-5 BG-5 0.0 0.5 5.2 26.4 mg/kg BG 1026.8 Urban
BG-6 BG-6 0.0 0.5 8.4 66.1 mg/kg BG 1082.9 Urban
E-39 E-39_0.5 0.0 0.5 6.0 180.0 mg/kgN 1124.8 Urban
E-39 E-39-0.5_1 0.5 1.0 6.3 32.0 mg/kgN 1124.8 Urban
BG-10 BG-10 0.0 0.5 10.3 89.9 mg/kg BG 1134.5 Urban
BG-4 BG-4 0.0 0.5 2.2 416.0 mg/kg BG 1157.0 Urban
E-1 E-1-0.5 0.0 0.5 3.3 6.7 mg/kgN 1187.8 Urban
E-2 E-2-0.5 0.0 0.5 2.3 22.0 mg/kgN 1198.2 Urban
E-7 E-7-C-0.5 0.0 0.5 7.0 36.0 mg/kgN 1279.9 Urban
E-7 E-7-0.5 0.0 0.5 6.1 41.0 mg/kgN 1279.9 Urban
E-7 E-7-B-0.5 0.0 0.5 4.5 39.0 mg/kgN 1279.9 Urban
10B 10B-0.5 0.0 0.5 18.9 mg/kgN 1390.1 Urban
10B 10B-1.5 1.0 1.5 11.9 mg/kgN 1390.1 Urban
C2-2 C2-2 0.5 1.0 5.1 40.8 mg/kgN 1475.8 Urban
C2-3 C2-3 0.5 1.0 6.9 22.4 mg/kgN 1475.8 Urban
C2-1 C2-1 0.5 1.0 7.1 24.3 mg/kgN 1486.8 Urban
BG-8 BG-8 0.0 0.5 32.7 71.6 mg/kg BG 1702.6 Urban
E-19 E-19-0.5 0.0 0.5 11.0 66.0 mg/kgN 1755.1 Urban
E-20 E-20-0.5 0.0 0.5 5.2 8.7 mg/kgN 1867.3 Urban
E-18 E-18-0.5 0.0 0.5 4.4 110.0 mg/kgN 1873.9 Urban
D3-3 D3-3 0.5 1.0 3.1 10.6 mg/kgN 1957.4 Urban

8 D3-1 D3-1 0.5 1.0 5.2 19.2 mg/kg
N 1958.3 Urban
D3-2 D3-2 0.5 1.0 6.7 20.7 mg/kgN 1967.8 Urban
E-22 E-22-0.5 0.0 0.5 3.8 4.4 mg/kg
N 1982.3 Urban
1428 Freedom Boulevard CP-1 0.0 0.0 2.5 mg/kg BG 2295.7 Urban X12 X12_0.25 0.3 0.3 7.4 14.0 mg/kg BG 2414.4 Urban
1455 Freedom Boulevard SP(1-4) 0.0 0.0 2.5 mg/kg BG 2530.1 Urban X10 X10_0.25 0.3 0.3 17.0 63.0 mg/kg BG 2614.0 Urban
1488 Freedom Boulevard SP 0.0 0.0 3.0 mg/kg BG 2787.7 Urban X11 X11_0.25 0.3 0.3 4.4 11.0 mg/kg BG 2856.5 Urban
X6 X6_0.25 0.3 0.3 4.3 45.0 mg/kg BG 2921.5 Urban
X5 X5_0.25 0.3 0.3 2.5 7.0 mg/kg BG 3490.2 Urban
X7 X7_0.25 0.3 0.3 23.0 85.0 mg/kg BG 3925.4 Urban
X4 X4_0.25 0.3 0.3 2.3 26.0 mg/kg BG 3954.7 Urban
X1 X1_0.25 0.3 0.3 3.6 19.0 mg/kg BG 4105.2 Urban
X2 X2_0.25 0.3 0.3 3.7 99.0 mg/kg BG 4354.2 Urban
4B 4B-0.5 0.0 0.5 10.5 mg/kg
N 1037.5 Rural
4B 4B-1.5 1.0 1.5 10.2 mg/kg
N 1037.5 Rural
6B 6B-0.5 0.0 0.5 8.9 mg/kgN 530.7 Rural
6B 6B-1.5 1.0 1.5 7.5 mg/kg
N 530.7 Rural
BG-1 BG-1 0.0 0.5 5.21 23.6 mg/kg BG 1607.9 Rural
BG-15 BG-15 0.0 0.5 5.25 26.4 mg/kg BG 1099.2 Rural
BG-2 BG-2 0.0 0.5 6.37 131 mg/kg BG 1762.3 Rural
BG-3 BG-3 0.0 0.5 5.79 23 mg/kg BG 1833.6 Rural
BG-7 BG-7 0.0 0.5 9.26 80.5 mg/kg BG 1632.9 Rural
1715 West Beach Street INDALEZ-B-12-2 2.0 2.0 5.3 5.1 mg/kg BG 1990.2 Rural 1715 West Beach Street INDALEZ-B-3-2 2.0 2.0 3.5 5.3 mg/kg BG 1990.2 Rural 1715 West Beach Street INDALEZ-B-4-2 2.0 2.0 1.9 5.4 mg/kg BG 1990.2 Rural 1715 West Beach Street INDALEZ-B-6-1.5 1.5 1.5 4.5
7 mg/kg BG 1990.2 Rural
1715 West Beach Street INDALEZ-B-7-2 2.0 2.0 3.7 6.1 mg/kg BG 1990.2 Rural 1715 West Beach Street SB-1-1 1.0 1.0 12 ND mg/kg BG 1990.2 Rural 1715 West Beach Street SB-2-1 1.0 1.0 9.2 ND mg/kg BG 1990.2 Rural 17 Gaffey Road SP1(A-D)Composite 0.0 0.0 8.5 mg/kg BG 9497.6 Rural WB-6 WB-6-0.5 0.0 0.3 2.4 290 mg/kgN 808.2 Rural
X13 X13_0.25 0.3 0.3 12 51 mg/kg BG 3749.8 Rural
X14 X14_0.25 0.3 0.3 1.9 9.5 mg/kg BG 3483.2 Rural
X15 X15_0.25 0.3 0.35 9.5 mg/kg BG 4095.2 Rural
X16 X16_0.25 0.3 0.3 4.6 8.2 mg/kg BG 2976.9 Rural
X3 X3_0.25 0.3 0.3 2.6 29 mg/kg BG 5578.2 Rural
X8 X8_0.25 0.3 0.3 3.2 28 mg/kg BG 4780.4 Rural
X9 X9_0.25 0.3 0.3 3.2 16 mg/kg BG 3554.5 Rural
Z3 Z3c 0.2 0.2 11 200 mg/kgN 538.5 Rural

9

This report was prepared by CH2M HILL under the supervision of:

Project Manager
CH2M HILL
1111 Broadway Suite 1200
Oakland, CA 94607
February 2000

Contents
Volume I:

Page
Executive Summary .................................................................................................. ES-1 1 Introduction .................................................................................................................. 1-1

1.1 Report Organization .............................................................................................. 1-1 2 Site Setting and Background ..................................................................................... 2-1

2.1 Site Setting ............................................................................................................... 2-1

2.1.1 Regional Geology and Hydrogeology ....................................................... 2-1

2.1.2 Site Geology ................................................................................................... 2-2

2.2 Site Background ...................................................................................................... 2-3

2.2.1 Historical Site Use ......................................................................................... 2-3

2.2.2 Past Investigations ........................................................................................ 2-6

2.3 Summary of Results From Previous Investigations .......................................... 2-9 3 Supplemental Remedial Investigation Activities and Results ........................... 3-1

3.1 Samplin.g Objectives .............................................................................................. 3-1

3.2 Field Activities ........................................................................................................ 3-1

3.2.1 Area 1 ............................................................................................................. 3-2

3.2.2 Area 2 ............................................................................................................. 3-3

3.2.3 Area 3 ............................................................................................................. 3-3

3.2.4 Area 4 ............................................................................................................. 3-3

3.2.5 Area Adjacent to Area 4 .............................................................................. .3-3

3.2.6 Background Soil Samplin.g .......................................................................... 3-4

3.3 Results ...................................................................................................................... 3-4

3.3.1 Area 1 ............................................................................................................. 3-5

3.3.2 Area 2 ............................................................................................................. 3-6

3.3.3 Area 3 ............................................................................................................. 3-6

3.3.4 Area 4 ............................................................................................................. 3-7

3.3.5 Area Adjacent to Area 4 ............................................................................... 3-8

3.3.6 Groundwater Results ................................................................................... 3-8

3.3.7 Strychnine Soil Sampling Results ............................................................... 3-9

3.3.8 Background Soil Samplin.g ........................................................................ 3-10

3.3.9 Estimation of Arsenic Background Concentration ................................ 3-10

3.3.10 Well Survey ............................................................................................... 3-11

3.3.11 Deviations from Work Plan ..................................................................... 3-11

3.4 Conclusions ........................................................................................................... 3-12 SFOfTOC.DOC/981050005

CONTENTS, CONTINUED
4 Conceptual Site Model ................................................................................................ 4-1

4.1 Conceptual Site Model .......................................................................................... 4-1

4.1.1 Nature and Extent of Cal Spray Residues ................................................. 4-1

4.1.2 Site Stratigraphy ........................................................................................... 4-3

4.1.3 Fate and Transport Properties of Arsenic and Lead ............................... .4-3

4.1.4 Conclusion ..................................................................................................... 4-6 5 Feasibility Study .......................................................................................................... 5-1

5.1 Remedial Action Objectives and Goals .............................................................. .5-1

5.2 Identification of Soil Remedial Action Alternatives .......................................... 5-2

5.2.1 Technologies .................................................................................................. 5-2

5.2.2 Remedial Action Alternatives ..................................................................... 5-3

5.3 Evaluation of Remedial Action Alternatives ..................................................... .5-5

5.3. l Effectiveness .................................................................................................. 5-5

5.3.2 Implementability .......................................................................................... 5-6

5.3.3 Costs ............................................................................................................... 5-6

5.4 Recommended Remedial Action ........................................................................ .5-7 6 References ...................................................................................................................... 6-1 SFOfTOC.DOC/981050005 Ill

CONTENTS, CONTINUED
List of Tables
1 Summary of ASE Soil Sampling Results
2 Summary of Soil Analytical Data, CH2M HILL Investigations - Area 1 3 Analytical Results for CAM 17 Metals in Soil Samples
4 Summary of Soil Analytical Data for Area 2
5 Summary of Soil Analytical Data for Area 3
6 Summary of Soil Analytical Data for Area 4
7 Analytical Results for Area Adjacent to Area 4 Soil Samples 8 Groundwater Analytical Results Supplemental Remedial Investigation 9 Analytical Results for Offsite Background Soil Samples 10 Analytical Results for Soil Geochemical Parameters
11 Summary of Remedial Action Alternatives for Area 1
12 Evaluation of Remedial Action Alternatives for Area 1 SFOfTOC.DOC/981050005 IV

List of Figures
1 Site Location - Cal Spray Site
2 Site Map - Cal Spray Site
3 Regional Hydrogeologic Cross Section
4 Boring Locations - Cal Spray Site
5 Geologic Cross Section Locations
6 Geologic Cross Section A-A'
7 Geologic Cross Section B-B'
8 Geologic Cross Section C-C'
9 Geologic Cross Sectio~ D-D'
10 Estimated Fill Layer Thickness
11 Timeline - Area 1 Parcel Summary
12 Former Onsite Strucrures - Area 1
13 Locations of Offsite Background Soil Samples
14 Soil Analytical Data -Area 1
15 Soil Analytical Data - Areas 2, 3, and 4
16 Remedial Alternative Costs for Area 1
SFOITOC.OOC/981050005

CONTENTS, CONTINUED
v

CONTENTS, CONTINUED
Volume II: Appendices A, C, D, E, F, and G
Appendix A - Soil Boring Logs
Appendix C - DISC Arsenic and Lead Residential Cleanup Criteria Approval Letter - Dated October 18, 1999
Appendix D-Report entitled Flooding and South Watsonville, 1909-1950, by Sandy Lydon.

Appendix E-Estirnation of Arsenic Background Concentration Appendix F - Compliance with ARARS
Appendix G - Remediation Areas and Detailed Cost Reports Volume Ill: Appendix B
Appendix B-Analytical Data
SFOffOC.DOC/981050005 VI

Acronyms
ARARs
ASE
Bgs
core
CCR
DTSC
FEMA
FS
MCL
Msl
O&M
RCRA
SI
TPH
TRPH
voe
SFO!TOC.DOC/981050005
Applicable or Relevant and Appropriate Regulations
Applied Science and Engineering
Below ground surface
Chemical of Potential Concern
California Code of Regulations
Department of Toxic Substances Control
Federal Emergency Management Agency
Feasibility Study
Maximum Contaminant Limit
Mean sea level
Operation and Maintenance
Resource Conservation and Recovery Act
Supplemental Investigation
Total petroleum hydrocarbons
Total recoverable petroleum hydrocarbons
Volatile Aromatic Compound

Executive Summary
This report presents the results of the Remedial Investigation and Feasibility Study (RI/FS) conducted at the former California Spray and Chemical Company (Cal Spray) site, located at 135 Walker Street, Watsonville, California. This RI/FS has been prepared pursuant to Voluntary Cleanup Agreement Docket No. HSA 97 /98-005 with the Department of Toxic Substances Control (DTSC), Region 2 in Berkeley, California. The Cal Spray site is located in the southwest portion of the City of Watsonville and is situated in low-lying flatlands of the Balsa Del Pajaro, within the floodplain between Watsonville Slough and the Pajaro River. It is located approximately 5 miles east of the Pacific Ocean at an elevation approximately 20 feet above mean sea level (msl), and is 0.3 miles northwest of the Pajaro River.

The Cal Spray site is comprised of four areas. The property located at 135 Walker Street is referred to as Area 1, and is the location of the former Cal Spray operations. Area 1 is bounded on the north by Walker Street, on the east by Riverside Drive, and on the south by Locust Street. Two parcels bound the property to the west. The southernmost property, located at 228 Locust Street, is referred to as Area 2. The northernmost property, located at 131 Walker Street, is referred to as Area 3. Area 4 is west of Area 2 and south of Area 3, and is located at 234 Locust Street.

The California Spray and Chemical Company, a predecessor of Chevron Chemical Company, was formed in 1907 to produce lead arsenate insecticide spray to control coddling moths which were damaging apple orchards in the Pajaro Valley. The manufacturing plant was constructed in 1908 at the Cal Spray site, and produced lead arsenate, lime-sulfur solutions, and strychnine. The manufacturing process was discontinued from the site in 1929. Warehouse operations continued at the site until the early 1950's.

Investigations were initiated at Area 1in1996 after discolored material was discovered during the construction of a new building. Nine sampling events have been conducted on or around the Cal Spray site between 1996 and 1998. The investigations were performed to assess what chemical constituents may remain on the properties as residues from the past manufacturing operations, and to determine the horizontal and vertical extent of constituents of concern in soil and/ or groundwater.

Data collected from borings installed during the field investigations indicate the geology underlying the site is characterized by approximately 5 feet of silty sand fill underlain by dense, organic rich, blue-gray to black clay varying from 2 to 6 feet in thickness. This clay, which is indicative of a former swamp or slough environment, thins towards the northeastern portion of the Cal Spray site and is, in turn, underlain by 5- to 10-feet of soft to firm silty clay. The silty clay is underlain by a 5- to 20-foot thick layer of sand and sandy gravel. Depth to first encountered groundwater varies from approximately 20 to 30 feet below the ground surface. Regional groundwater supplies are drawn from two principal aquifers: the semi-confined alluvial aquifer, composed of 200 feet of interbedded, laterally d~scontinuous sand, clay, and gravel; and the confined Aromas Formation, composed of ES-1

fine-grained sand. Groundwater is withdrawn from these aquifers between 150 and 400 feet below ground surface.

The results of investigations conducted at the site indicate that lead and arsenic in soil are the only constituents of potential concern at the Cal Spray site. Furthermore, an evaluation of analytical data collected during the field investigations (combined with a calculated ambient, or background arsenic concentration of 18 mg/kg) indicates that the horizontal extent of arsenic- and lead-impacted soil at the Cal Spray site is limited to Area 1, the southern and eastern portions of Area 2, the southwestern comer of Area 3, and the northern and southern portion of Area 4. With the exception of limited areas on Area 1 and Area 2, arsenic- and lead-impacted soil is found at maximum depths of 5 to 6 feet below grade.

Groundwater beneath the Cal Spray site does not appear to be impacted by arsenic or lead.

One groundwater sample from boring CH23 did contain lead at 46 µg/L (greater than the lead action limit of 15 µg/L); however this result may be attributed to an extremely turbid grab groundwater sample. Groundwater from this area was re-sampled and did not contain detectable concentrations (<5 µg/L) of lead. Arsenic and lead were detected in grab groundwater samples from two other locations; however, the concentrations were below the MCL for arsenic and the action level for lead. One volatile organic compound (VOC) (1,2- dichloroethane) was detected once in one of 9 groundwater samples, at a concentration above the MCL. The source of this compound in unknown, although it is unlikely that the source was from original Cal Spray manufacturing activities since VOCs were not used during Cal Spray operations.

In conjunction with the RI, a Feasibility Study (FS) was conducted for the Cal Spray site to evaluate alternatives for mitigating the lead- and arsenic-impacted soil. The following DTSC-approved residential soil cleanup criteria was established for the site:
• The site background arsenic concentration for the Cal Spray site has been estimated as 18 mg/kg (as discussed in Section 3.3.9). Arsenic concentrations found to exceed 18 mg/kg during remediation, as determined by confirmation samples collected from the bottom and side-walls of all excavations shall be shall be remediated and handled in accordance to methods outlined in this report.
• A site-wide average concentration of 400 mg/kg for lead, with no single lead concentration exceeding 840 mg/kg.

For Area 1, eight remedial action alternatives were evaluated for effectiveness, implementability, and cost. These alternatives were:

Alternative 1: No further action.

Alternative 2: Asphalt cap.

Alternative 3: Hot spot removal with an asphalt cap.

Alternative 4: Hot spot removal, removal of top two feet of soil in areas exceeding cleanup criteria, plus asphalt paving.

ES·2

Alternative 5: Removal of top two feet of soil in areas exceeding clean-up criteria with asphalt paving.

Alternative 6: Removal of all soil containing arsenic and lead exceeding clean-up criteria.

Alternative 7: In-situ stabilization, with asphalt paving Alternative 8: Ex-situ stabilization, with asphalt paving Chevron recommends implementing Alternative 2 as the preferred remedial action for Area 1 because of its high benefit to cost ratio. The short-term risk from exposure to site soil during remediation activities for this alternative is the lowest of all alternatives, and it provides the same degree of long-term protection of human health as all other alternatives (except Alternative 1). Paving over the existing asphalt prevents direct exposure to impacted soil both now and in the future. This alternative is the easiest to implement and the least costly. Since soil containing arsenic and lead at concentrations above cleanup criteria will remain onsite following alternative implementation, ongoing operations and maintenance (O&M) activities will be required. However, O&M is also required for all other alternatives except Alternative 6.

For Area 3 and Area 4, Chevron recommends excavation and consolidation or offsite disposal of all material exceeding the cleanup criteria, followed by restoration of each of the properties to their original conditions. This action will ensure the most expeditious and effective cleanup for these properties.

The recommended alternative for Area 2 will depend upon the final zoning designation of the property. Two alternatives are proposed for this property:

1. If the property remains zoned as residential, then the alternative for this property is excavation and offsite disposal of all material exceeding the cleanup criteria, then restoration of the property to its original condition.

2. If the property is re-zoned as industrial, then the recommended alternative for this property is cover the site with an asphalt cap, and institute a deed restriction. Some of the soil excavated from Area 3 and/ or Area 4 may be consolidated onto Area 2.

ES·3

SECTIONl
Introduction
This report presents the results of a Remedial Investigation and Feasibility Study (RI/FS) conducted at the former California Spray and Chemical Company (Cal Spray) property, located at 135 Walker Street, Watsonville, California, and on adjacent parcels (Figures 1 and 2). This RI/FS has been prepared pursuant to Voluntary Cleanup Agreement Docket No.

HSA 97 /98-005 with the Department of Toxic Substances Control (DTSC), Region 2 in Berkeley, California.

The site at 135 Walker Street is the historical location of the California Spray and Chemical Company, a predecessor of Chevron Chemical Company (Chevron). Cal Spray manufactured lead arsenate sprays, lime sulfur solutions, and strychnine at this location between 1909 and 1929. The native soils at the site have been covered with a layer of fill that varies in thickness across the site. Since the early 1950's, the site has been paved with asphalt.

This remedial investigation is composed of data from several field investigations conducted at the Cal Spray site. Field investigations were conducted in June, September, October, and November of 1996; and a Supplemental Investigation (SI) was performed between December 2 and December 11, 1997, and on March 31, 1998. Additional samples were also collected on July 2, 1998, November 3 and 4, 1998, July 29, 1999, and September 20, 1999.

In general, the investigations have detected elevated concentrations of arsenic and lead in the fill layer and shallow soil underlying the site, and on three properties adjacent to the site. Groundwater does not appear to be impacted by historic site operations.

1.1 Report Organization
This report presents the results of the RI/FS conducted at the Cal Spray site, and describes the development and evaluation of remedial action alternatives to manage arsenic and lead detected in soil at the site. The remainder of this report has been organized into the following sections:
• Section 2 describes the site physical setting and historical background, and presents results from previous investigations.
• Section 3 presents the supplemental investigation (SI) sampling objectives, field activities, and results.
• Section 4 uses data from the SI and previous investigations to develop a Conceptual Site Model.
• Section 5 presents the Feasibility Study in which a range of remedial alternatives is identified and evaluated. A remedial action is recommended for implementation. • Section 6 presents references cited in the report.

SFO/SECRED1.DOC/981050004 1·1

SECTION 2
Site Setting and Background
This section presents background information on the Cal Spray site, including summaries of field investigations conducted to date and the regional hydrogeological setting.

2.1 Site Setting
The Cal Spray site is located in the southwest portion of the City of Watsonville (Figure 1).

The site is situated in low-lying flatlands of the Bolsa Del Pajaro, within the floodplain between Watsonville Slough and the Pajaro River. It is located approximately 5 miles east of the Pacific Ocean at an elevation approximately 20 feet above mean sea level (msl), and is

0.3 miles northwest of the Pajaro River. The site coordinates are approximately North 36°54' - South 121°45'. The site is located within an area described by the Federal Emergency Management Agency (FEMA) as the 100-year shallow flood plain, where flood depths are projected to be between one and three feet deep.

The Cal Spray site is comprised of four areas. The property at 135 Walker Street 1, herein referred to as Area 1, is the historical location of the Cal Spray operations (Figure 2). The property is approximately two acres in size, fenced, and paved primarily with asphalt.

There is one structure on the northern portion of the property, currently housing a tire retreading operation. A pole shed, used in the past for pallet storage and truck repair, is located on the southern portion of the site. It is currently used for pallet manufacturing and storage.

Area 1 is bounded on the north by Walker Street, on the east by Riverside Drive, and on the south by Locust Street. Two parcels bound the property to the west (Figure 2). The southernmost property, located at 228 Locust Street, is vacant and contains a vacant twostory structure. This property is herein known as Area 2. The northernmost property, located at 131 Walker Street, is paved and contains one building currently housing an irrigation and piping supply company. This parcel is herein known as Area 3. Area 4, located at 234 Locust Street, is west of Area 2 and south of Area 3. This property contains a single family home.

2.1.1 Regional Geology and Hydrogeology
The underlying native soils in the site vicinity are predominantly interbedded, laterally discontinuous sand, clay, and gravel, typical of the Quaternary Older Flood-Plain Deposits as mapped by Dupre and Tinsley in their document entitled Geology and Liquefaction Potential of Northern Monterey and Santa Cruz Counties, California (1980). These alluvial deposits are up to 200 feet thick and overlay the Aromas Formation. The Aromas Formation is located between 200 and 600 feet below ground surface (bgs), is characterized by its red 1 Although the Cal Spray facility physical location has not changed, the address for this property has changed over the years due to local development and owner's preference. The property is referred to herein by its current address.

SFO/SECT2 rils.doc/981050003 2·1

SECTION 2 SITE SETIING AND BACKGROUND
color, and is typically a fine-grained sand. The Purisima Formation is found below 600 feet bgs. Figure 3 presents a regional hydrogeologic cross section of the Watsonville area.

The principal water supply aquifers for the Watsonville area are the basal gravel unit of the alluvial aquifer, the Aromas Red Sands, and the Purisima Formation. Groundwater within the alluvium occurs in two distinct zones: (1) the shallow unconfined portion, and (2) the deeper, semi-confined basal gravel unit. The shallow groundwater body in the upper part of the alluvium is separated from the main water bearing zones by beds of clay and silt (USGS, 1972). Few wells tap the shallow zone because the yield is small and the water quality is marginal for most uses. Municipal water wells extract groundwater from the basal gravel unit and from the Aromas Sands.

Groundwater in the shallow water-bearing zone (upper part of the alluvial zone) generally flows south to southwest towards the Pajaro River and the Pacific Ocean. Deeper groundwater in the Aromas Formation generally flows to the west toward the Pacific Ocean.

Deep groundwater flow in the Pajaro Valley is, however, highly influenced by pumping wells, with agricultural and municipal groundwater use creating inwardly radial flow patterns toward Watsonville and the lower Pajaro River Valley. Seasonal water levels have been reported as low as -20 msl (approximately 40 feet bgs).

The groundwater flow direction at the site is not known since there are no monitoring wells at the site to measure the exact water elevation. However, numerous published reports on the hydrogeology of the Pajaro Valley agree that shallow groundwater flow in the Valley in vicinity the Cal Spray site is southwest towards Monterey Bay (Geology and Groundwater, Pajaro Valley Area, California, USGS Open-File Report, June 27, 1972; and, Geohydrology and Mathematical Simulation of the Pajaro Valley Aquifer System, Santa Cruz and Monterey Counties, California, USGS, Water-Resources Investigations Report 87-4281). Further, the direction of shallow groundwater flow is governed by topography, and the topography in the area of the Cal Spray site slopes southwest towards Monterey Bay, indicating the direction of groundwater flow is southwest towards the Bay.

2.1.2 Site Geology
Ninety-four (94) borings have been installed on and around the Cal Spray site, ranging in depths from 0.5 to 31 feet bgs. These include seven geotechnical borings installed by Haro, Kasunich & Associates in August 1993, one hand-auger boring installed by Applied Science and Engineering, Inc. in June 1996, 72 borings installed by CH2M HILL in September, October, and November 1996, December 1997, March and July 1998, and 14 borings installed by Cambria Environmental in November 1998. Of these 94 borings, 46 have been installed on Area 1, 14 have been installed on Area 2, 11 have been installed on Area 3, 15 have been installed on Area 4, and 8 have been installed on the property adjacent to Area 4. Figure 4 shows the locations of all borings installed by CH2M HILL and Cambria. Figure 5 shows the location of geologic cross sections, and Figures 6, 7, 8, and 9 present geologic cross sections.

Area 1 is covered with asphalt that varies from 1 to 8 inches thick. The asphalt is underlain by approximately 4 inches of imported sandy gravel base rock. The base rock is underlain by 3 to 6 feet of fill composed primarily of silty sand, and in some cases, inert debris such as wood and brick fragments. The thickness of the fill layer varies over the site, ranging from

2.5 to 6 feet thick, with an average thickness of about 5 feet. Figure 10 presents a contour SFO/SECT2 nfs.doc/981050003 2-2

SECTION 2 SITE SITTING AND BACKGROUND
map showing the fill layer thickness beneath the Cal Spray site. The fill layer is underlain by a dense, organic rich, blue-gray to black clay that varies in thickness from 2 to 6 feet. This organic rich clay has a very strong hydrogen sulfide (H2S) odor that is indicative of anaerobic swamp or slough environments. This black clay was encountered in most borings on the Cal Spray site, and an 1865 historical survey map of the Watsonville area indicates that the Cal Spray site is built on or adjacent to the former location of a slough named "First Slough", which is the likely source of the black clay. The black, organic rich clay thins toward the northeastern portion of the Cal Spray site and is not present under Area 3. A 5- to 10-foot-thick layer of soft to firm silty clay underlies the black clay in most locations. A 5- to 20-foot-thick layer of sand and sandy gravel is found beneath the clay layers under the northern portion of the Cal Spray site. Several borings encountered perched groundwater at depths as shallow as 12 feet bgs. However, the depth of the water table aquifer beneath the site appears to be 28 to 30 feet bgs.

2.2 Site Background

2.2.1 Historical Site Use
Area 1 is the historical location of the California Spray and Chemical Company, formed in 1907 to produce lead arsenate insecticide spray to control coddling moths which were damaging apple orchards in the Pajaro Valley. The California Spray and Chemical Company was formed by Charles Rodgers, William Volek, E. Luther, and Charles Silliman. The plant was constructed in 1908 on leased property on Walker Street between First and Second Streets, and produced lead arsenate, lime-sulfur solutions, and strychnine. The pesticides were first sold through local dealers, but later were sold directly to the orchardists (Lewis, 1976). The manufacturing of the pesticides at the site ceased in 1929 (Gardner, 1978); however, warehouse operations continued until the early 1950s.

Areas 2, 3, and 4 were never associated with the former California Spray and Chemical Company. Areas 2 and 4 have contained residences since at least 1908, and Area 3 was a fruit packing plant from at least 1920 through 1956, after the Cal Spray operations ceased.

A title search for all parcels of the former Cal Spray property from 1892 through 1990 was performed. Figure 11 presents a timeline for the various parcels and property owners for Area 1. Container Equipment Company purchased the Cal Spray parcels in 1951 (Maiorana, 1996). Adjoining parcels were purchased by the company between 1953 and 1976. Richard Hammond, the current site owner, bought the Container Equipment Company in 1973.

Based on available historical information, manufacturing processes of the Cal Spray Company were as follows:

Lead-Arsenate
In 1906, a new catalytic process was patented for manufacturing lead arsenate. In the then-existing manufacturing process, lead acetate was mixed with arsenic acid to form diplumbic lead arsenate. In newer processes, litharge (manufactured from pig lead) and a catalyst initially replaced lead acetate in the manufacturing process.

Later processes replaced the litharge with an in-plant manufactured lead suboxide.

SFO/SECT2 rits.doc/961050003 2·3

SECTION 2 SITE SETIING AND BACKGROUND
Triplurnbic lead arsenate was subsequently invented which could be used on trees and shrubs that were highly sensitive to arsenic bum.

The manufacturing of lead arsenate was a wet process in which lead oxides in the form of water-based slurries were pumped into reaction vessels and mixed with arsenic acid. The resulting slurry was then pumped through a plate-and-frame filter, and the filter cake, containing about 50 percent water, was placed on trays and stacked on mine carts. The mine carts were then rolled into sheds where the product was dried with forced hot air. The dried product was ground as necessary and packaged dry for use.

Lime-Sulfur Solution
One of the first Cal Spray products, Ortho Lime-Sulfur Solution, was manufactured from lump sulfur and lime. The result was a solution appropriate for dusting for Peach Twig Borer control on peaches, nectarines and plums and for control of the Pear Leaf Blister Mite.

Strychnine
Strychnine was extracted from nux-vomica beans. The beans, imported from India, naturally yield the drugs nux-vomica and strychnine. In a patented extraction process, about equal amounts of strychnine and brucine alkaloids with 5% to 10% impurities were produced. This product was marketed under the name Ortho Strychnine.

Sanborn Fire Insurance maps were reviewed for information regarding former site features and structures. Coverage was available starting in 1892, with additional maps available in 1902, 1908, 1920, and 1956. Copies of these maps can be found in Appendix A of the Work Plan for the Supplemental Investigation of the Cal Spray Site and Adjoining Properties, Chevron Chemical Company (CH2M HILL, 1997a), herein referenced as the SI Work Plan.

The 1892 and 1902 Sanborn maps show Areas 1and3 occupied by residences, and Area 2 was vacant. The 1908 Sanborn map shows the northern and southwestern portions of Area 1 occupied by residences, and the southeastern portion of the site occupied by "G. A.

Moorehead Fruit Packing". Areas 2, 3, and 4 contained single family residences. The 1920 Sanborn map shows the northern portion of Area 1 occupied by the "Ortho Cal Spray Chemical Company", and the "Martin Brothers Fruit Packing House" on the southeastern portion of the site. Residences remain in the southwestern portion of the site and in Areas 2 and 4. Area 3 was occupied by the B. Pista Company Fruit Packing House and contained 3 large buildings. The 1920 Sanborn map shows the following features on the Cal Spray portion (Area 1) of the site:
• Strychnine tanks (concrete, 12 feet high)
• Oil tanks (concrete, underground)
• Water tower (10 feet high)
• Lime kiln (concrete)
• Lead furnace
• Retort
• Still (concrete)
SFO/SECT2 nts.doc/981050003 2-4

SECTION 2 SITE SETTING AND BACKGROUND
• Furnaces
• Pump house
• Storage shed
• Well
• Building containing grinding operations and a 20 horsepower engine • Building containing mixing tanks with storage above
• Warehouse (located directly adjacent to Walker Street) Figure 12 presents an overlay of these structures on the current site.

The 1956 Sanborn map shows the parcel formerly containing Cal Spray site vacant except for a new building used for box crating. This building is steel frame construction on a concrete floor, is set back from Walker Street, and currently houses a tire company. The 1956 map shows Areas 2 and 4 with residences, and Area 3 containing one of the three fruit packing buildings.

Certain Area 1 features from the 1920 and 1956 Sanborn maps correspond with two historical aerial photographs reviewed. The first photograph is from 1950 and shows only the warehouse and water tower seen on the 1920 Sanborn Map; no other structures are located onsite. The second photograph, from 1953, shows the entire site graded and paved, a new structure constructed for the box crating plant, and stacks of materials in the yard west of the building.

The current status of the well and underground storage tanks is not known, and there is no evidence of these features on the site today, however, they are not believed to be present.

The following activities have been performed to assess the status of the tanks:
• A soil boring (CHS) was drilled at the location of the former underground oil tanks, and visible observations did not indicate the presence of a tank. • A hole was excavated in the area of the former underground oil tanks during an attempt to install foundation footings. Observations within this excavation did not indicate the presence of a tank
• The City of Watsonville has no records of a UST installed or removed at the Cal Spray site.

The Santa Cruz County Environmental Health Department and the City of Watsonville were contacted on August 13 and August 14, 1998, respectively, to request of information regarding the well. The Santa Cruz County Environmental Health Department maintains records of all wells in the county. Neither the County nor the City have any record of the construction, or destruction of the well.

Currently, the sole building onsite is used by a tire company for tire sales and retread operations. In the past year, the pole shed located on the west side of the site was used by a second tenant for truck repair operations and for storing pallets and other packing material.

Prior to this time (circa 1993), the pole shed was used for automobile repair, and a pit existed in the pole shed. This pit does not exist today. The pole shed is currently used for pallet manufacturing and storage.

SFO/SECT2 nfs.doc/981050003 2-5

SECTION 2 SITE SETTING AND BACKGROUND
A tire retreading process, called the Bandag process, is currently used by the tire company leasing a portion of the site. This retreading process requires the use of three liquids (CH2M HILL, 1997b):
• Rubber cement, which is a blend of commercial heptane and rubber. • Commercial heptane solvent, which is to be used in small amounts, if at all. • Tire repair cements, containing trichloroethane (TCA). On average, the process would entail the use of approximately 2 to 3 gallons of cement per year, containing approximately 10 pounds of TCA per gallon of cement.

It is not known what other potentially hazardous materials may have been used by previous tenants in their operations.

2.2.2 Past Investigations
Five previous investigations have been conducted on the Cal Spray site between August 1993 and January 1997. Summaries of these investigations follow. Copies of reports pertaining to these investigations can be found in the SI Work Plan (CH2M HILL, 1997a).

August 1993 Geotechnical Investigation
In August of 1993 in preparation for construction of a new building, Haro, Kasunich & Associates was retained to conduct a geotechnical investigation of the Cal Spray site. Haro et al. installed seven borings to a maximum depth of 21.5 feet bgs. These borings were installed either within or immediately adjacent to the excavation footprint and immediately adjacent to the covered storage area (known as the pole shed) near Locust Street. Evidence of the previous land use was uncovered in six of the seven borings in the form of debris (brick or concrete debris, ceramic fragments) or discolored fill material. No further investigation of the discolored material was performed.

June 1996 Applied Science and Engineering (ASE) Investigation During construction of a new building in June of 1996, contractors for the current owner of Area 1 encountered discolored material in soil immediately beneath the asphalt and base rock. Soil and asphalt removed during excavation of the building foundation were placed in two stockpiles next to the new building footprint. One small stockpile consisted primarily of asphalt material, and a larger stockpile consisted of gravel and sand base rock. Applied Science and Engineering (ASE) was retained to collect soil samples from two shallow excavations within the new building excavation footprint. In their report dated July 3, 1996, ASE documented the observation of oily sand, white non-native material, soil with crystals, and orange platy non-native material in addition to the native black silty clay. In an effort to characterize the various materials, ASE collected five discrete samples from the site. The non-native orange and white material samples were analyzed for total calcium (EPA Method 7140) and total sulfur (EPA Method 6010). The oily sand sample was analyzed for polychlorinated biphenyls (PCBs) and pesticides (EPA Method 8080), total recoverable petroleum hydrocarbons (TRPH by EPA Method 418.1), and semivolatile organic compounds (EPA Method 8270). A composite of the four non-native samples was analyzed for copper (EPA Method 7210) and arsenic (EPA Method 7060). Arsenic was detected at an SFO/SECT2 nts.doc/981050003 2-6

SECTION 2 SITE SffilNG AND BACKGROUND
elevated concentration in the composite sample, so the composite sample was subsequently analyzed for soluble arsenic via EPA Method 7060. After completing the sampling, ASE covered the exposed soil at the site with plastic sheeting.

Results of the ASE sampling are shown on Table 1. ASE found elevated levels of sulfur (up to 59,000 mg/kg) and calcium (up to 68,000 mg/kg) in the orange and white non-native material; however, these elements are not hazardous. Copper was also detected in a composite sample from the fill soil, but not at elevated levels. TRPH was detected up to 4,000 mg/kg in the non-native oily material, but the underlying native soil did not contain detectable concentrations of TRPH. Finally, total arsenic was detected in the composite soil sample at 410 mg/kg, but was below the Total Threshold Limit Concentration (ITLC) of 500 mg/kg. The subsequent analysis for soluble arsenic contained arsenic at a concentration of 11 mg/L, exceeding the Soluble Threshold Limit Concentration (STLC) of 5 mg/L.

July 1996 Analyses
In early July 1996, CH2M HILL was retained by Chevron Chemical Company to investigate the extent of chemical constituents detected in the soil by ASE in June. CH2M HILL contacted the analytical laboratory used by ASE, Entech Analytical Laboratory, in Sunnyvale, California and determined that there was soil remaining from the samples collected by ASE. These samples were sent to Quality Analytical Laboratory (QAL) in Redding, California for analysis for strychnine. Strychnine was not detected in the three samples analyzed; the orange platy material, the white material, and the soil with crystals were the samples chosen for analysis. Table 1 presents the results of these strychnine analyses.

September 1996 Investigation
In September 1996, CH2M HILL installed seven Geoprobe borings on Area 1 (CHl through CH7) to assess the nature and extent of chemical constituents at the site. Three of these borings were installed within the footprint of the excavation for the new building, and the remaining four borings were installed on the perimeter of the site, one in each comer of the property. The perimeter borings (CHl through CH4) were installed to a maximum depth of 3 feet bgs, with soil samples collected from each at depths of 0.5 to 1 feet bgs, 1.5 to 2 feet bgs, and 2 to 3 feet bgs. The three interior borings were installed to a maximum depth of 18 feet bgs, with soil samples collected from approximately 15 to 16 feet bgs and from 17 to 18 feet bgs to assess the vertical extent of arsenic and lead in soil. All soil samples were analyzed for arsenic, lead, and mercury, and the samples from borings CH2, CHS, CH6, and CH7 were analyzed for TRPH. Selected soil samples were also analyzed for strychnine.

Table 2 summarizes the analytical results for this investigation.

The results of the soil sampling and analyses indicated there were no detectable concentrations of TRPH or strychnine; low (non-hazardous) concentrations of mercury (up to 1.8 mg/kg) and elevated concentrations of arsenic (up to 7,020 mg/kg in CH3) and lead (up to 1,560 mg/kg in CHl) were detected in soil at the site.

SFO/SECT2 rifs.docl981050003 2·7

SECTION 2 SITE SETTING AND BACKGROUND
October 1996 Investigation
In October 1996, CH2M HILL installed three additional Geoprobe borings (CHS through CHIO) at the Cal Spray site. These borings were located on the northern and southern perimeters of the site, near previously installed borings CHl and CH3, to assess if elevated concentrations of arsenic and lead were present at the site boundary. These borings were installed to a maximum depth of 6 feet, with soil samples collected from 0.5 to 1 feet bgs, 2.5 to 3 feet bgs, and 5.5 to 6 feet bgs. The soil samples were analyzed for arsenic and lead.

Table 2 summarizes the analytical results. Of these three borings, only one boring, CHIO, contained concentrations of arsenic (up to 2,830 mg/kg) and lead (up to 8,940 mg/kg) in excess of the California Title 22 ITLCs. Boring CHIO was located adjacent to the property line between Area 1 and Area 2 to the northwest.

November 1996 Investigation
In November 1996, CH2M HILL installed ten additional Geoprobe borings (CH11 through CH20) on Area 1, and four hand auger borings (HAl through HA4) on Area 2, northwest and immediately adjacent to the site and boring CH10. Area 2 is unpaved, and is at an elevation approximately 1 to 2 feet below the grade of Area 1. The Geoprobe borings were installed to further delineate the extent of arsenic and lead at the site. The hand auger borings were installed to determine if chemical constituents were present on Area 2.

The ten Geoprobe borings installed on Area 1 were located on an approximate grid across the site to a maximum depth of 9 feet bgs. Soil samples were generally collected from 2 to

2.5 feet bgs, 4 to 4.5 feet bgs, 6 to 6.5 feet bgs, and 8 to 8.5 feet bgs. These soil samples were analyzed in a phased manner for total arsenic and lead, and two samples (collected from CH19 and CH20 at a depth between 8 to 8.5 bgs) were analyzed for TRPH after field observations indicated possible petroleum contamination. Table 2 summarizes the analytical results from this investigation.

The results of the analyses indicated that potentially hazardous concentrations of arsenic and lead were distributed randomly across the site in the fill layer, and that there was no discernible correlation between the locations of the detections and historical site features.

The two samples from CH19 and CH20 contained TRPH at concentrations of 715 and 3440 mg/kg, respectively.

The four hand auger borings installed on Area 2 were located adjacent to the fenceline, near borings CH3 and CHIO (the two early Geoprobe borings that contained elevated levels of arsenic and lead). Space limitations onsite (in the form of lumber, metal debris, and automobiles piled on or near the fenceline) dictated the boring locations.

Hand auger borings HAl and HA2 were located northeast of CH3 and CHlO, and soil samples were collected from 0 to 0.5 feet bgs. Borings HA3 and HA4 (both located northwest of CH3 and CHlO) were installed to a maximum depth of 3 feet bgs, with soil samples collected between 0 and 0.5 feet bgs and 2.5 and 3 feet bgs. All soil samples were analyzed for arsenic and lead. Elevated concentrations of arsenic and lead were detected in 4 of 6 soil samples collected.

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SECTION 2 SITE SETTING AND BACKGROUND
November 1996 Site Winterization
In early November 1996, the exposed soil area at Area 1 was covered with 10-mil plastic sheeting as a winterization measure to prevent the soil from migrating due to stormwater runoff and/ or air transport, and to reduce the possibility of direct contact with the soil.

Also, three composite soil samples were collected from the two stockpiles of soil and asphalt adjacent to the exposed area. One composite soil sample (SP-1) was collected from the small stockpile of asphalt, and two composite soil samples (SP-2N and SP-2S) were collected from the large stockpile and analyzed for arsenic and lead. Elevated concentrations of both arsenic and lead were detected in the composite samples from the large stockpile, at maximum concentrations of 483 mg/kg and 1340 mg/kg, respectively.

January 1997 Stockpile Sampling
In preparation for the removal of the two soil stockpiles on Area 1, eight additional soil samples were collected from the large stockpile and one composite soil sample was collected from the small stockpile. All samples were analyzed by the Total Concentration Leaching Procedure (TCLP). One sample from the large stockpile (SP2-4) contained lead at 5.1 mg/L, which exceeded the lead TCLP limit of 5 mg/L. This sample was re-analyzed by EPA Method 1310A -Extraction Procedure Toxicity (EP-Tox) as directed by Waste Management, Inc. (the disposal facility) for waste characterization. The EP-Tox result was 0.3 mg/L, thus the soil was not characterized as RCRA-hazardous. The sample from the small stockpile was also analyzed by the Soluble Threshold Limit Concentration (STLC) method and contained lead at 6.3 mg/L (exceeding the STLC of 5 mg/L).

Both the large and small stockpiles contained concentrations of lead in excess of the California ITLC and STLC for designation as a California hazardous waste. Both stockpiles were loaded, transported, and disposed of at Waste Management, Inc. Kettleman Hills Class I landfill on March 28, 1997.

2.3 Summary of Results from Previous Investigations
Compounds produced at the California Spray and Chemical Company were lead arsenate, lime-sulfur solution, and strychnine. The historical site use and development and the results of the investigations conducted through January 1997 indicate that residues from the former Cal Spray lead arsenate manufacturing currently exist in shallow soil at the site. The analytical data from these investigations indicate that the chemicals of potential concern (COPCs) at the site are limited to arsenic and lead. Analytical results from the previous investigations are presented in Tables 1 and 2. High concentrations of calcium and sulfur (products of lime-sulfur solution) were detected; however, these compounds are not considered a health hazard, and thus are not of concern. Nine (9) soil samples were analyzed for strychnine, but strychnine was not detected. Mercury was detected in 17of18 soil samples, but at low concentrations within the range of background concentrations (which range from 0.1to1 mg/kg in California soils according to Bradford et al., 1996). Two soil samples from the ASE investigation were analyzed for organochlorine pesticides and PCBs, but none were detected. This was expected since the dates of operation of the Cal Spray formulation facility (1909 through 1929) pre-date the development of organochlorine pesticides. The first of the organochlorine pesticides, DDT, was first introduced to the SFO/SECT2 rits.doc/981050003 2-9

SECTION 2 SITE SETTING AND BACKGROUND
United States in 1942, and was not manufactured in the United States until 1944 (Farm Chemicals Handbook, 1984).

Arsenic and lead appear to be limited to the fill layer of soil underlying the site. The fill layer varies from 2 to 6 feet in thickness, with an average thickness of about 5 feet. Arsenic and lead concentrations in the fill soil exhibit a random distribution, and do. not correlate directly with former site facilities. Verbal information from the current site owner suggests that lead arsenate residues in surface soils were mixed and spread throughout the site as a result of grading and fill operations that took place in the 1950s, prior to site paving and construction of pallet manufacturing facilities. Grading and fill activities were repeated in the 1970s when adjoining parcels were purchased and added to the property.

Data collected during investigations through January 1997 suggested that further research into the extent of residues on and around the Cal Spray site was necessary. The Supplemental Investigation documented in Section 3 was performed to collect the additional data needed to delineate the extent of arsenic and lead on and around the Cal Spray site.

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SECTION 3
Supplemental Investigation Activities and
Results
This section presents the sampling objectives, field activities, and results of the supplemental investigation (SI). Field activities for the SI were performed at the Cal Spray site between December 2, and December 11, 1997. Additional sampling events were performed on March 31, 1998, July 2, 1998, November 3 and 4, 1998, July 29, 1999, and September 20, 1999. Specific field methodologies and procedures are described in the SI Work Plan (CH2M HILL 1997a). The November 3 and 4, 1998 sampling activities were performed by Cambria Environmental Technology, Inc, from Oakland, California.

3.1 Sampling Objectives
The sampling objectives for the SI investigation focused on collecting additional data to further define the presence and/ or extent of arsenic, lead, and other chemicals of potential concern (COPCs) in soil and groundwater to provide necessary data to evaluate possible remedial alternatives for the Cal Spray site. Samples will also collected to assess the ambient, or natural background concentration of arsenic in the area around the site.

The objectives of the SI were to:
• Determine the horizontal extent of historical Cal Spray residues in the shallow soil on or adjacent to the Cal Spray site.
• Collect additional data to determine if the underlying native soil has been impacted by current or historical site operations.
• Evaluate whether shallow groundwater under the site has been impacted by current or historical site operations.
• Determine if there are additional COPCs (other than arsenic and lead) present in soil at the site that might have resulted from current or historical site operations (e.g., metals, pesticides, VOCs). Other operations that may have contributed additional COPCs to the site include the Cal Spray warehouse operations (that continued into the early 1950's), the former auto repair business, or the current tire retread business. • Estimate background concentration levels for arsenic in the site vicinity.

3.2 Field Activities
Thirty (30) borings were installed on the three areas of the Cal Spray site (Area 1, Area 2, and Area 3) using Precision Sampling Inc.'s direct-push technology drill rig between December 2, and December 11, 1997, and on March 31, 1998. Four additional borings were installed by hand-auger on Area 2 on March 31, 1998. Two additional Area 1 borings and SFO/SECT3 RIFS KS.DOC/981240012 3-1

SECTION 3 SUPPLEMENTAL REMEDIAL INVESTIGATION ACTIVITIES AND RESULTS two additional Area 3 borings were installed using Precision Sampling Inc.'s direct-push technology drill rig on November 3 and 4, 1998. Thirteen hand auger borings were installed on Area 4 on July 2, 1998, with two additional hand auger borings installed on November 4, 1998. Eight hand auger borings were installed on the property adjacent to Area 4 (236 Locust Street) on November 4, 1998. Six of the eight hand auger borings installed at 236 Locust Street were re-drilled on September 20, 1999. Eight hand auger borings were installed at various offsite locations within 1-mile of the site on July 29, 1999 to determine the background arsenic concentration in this area of Watsonville. The boring and sampling locations and sampling rationale are described below.

3.2.1 Area 1
Ten (10) borings (CH21 - CH30) were drilled on Area 1 to assess the horizontal and vertical extent of COPCs at the locations shown in Figure 4. Borings were drilled to a depth corresponding with the top of the water table, and soil samples were collected from each boring at approximately 5-foot intervals. Four borings, CH21, CH22, CH25, and CH27, were installed at the same locations as previously installed shallow soil borings (CH3, CH13, CH17, and CH20, respectively) to determine if the deeper, native soil in these areas has been impacted by Cal Spray residues. Soil samples collected from below 15 feet bgs were not analyzed, but held at the laboratory for possible later analysis depending upon results of the 10- and 15- foot bgs samples. Grab groundwater samples were collected from borings CH23, CH25, CH28, and CH30 and analyzed for arsenic, lead, and volatile organic compounds (VOCs). A grab groundwater sample collected from CH26 was only analyzed for arsenic and lead. The groundwater sample from CH30 was also analyzed for polychlorinated biphenyls (PCBs) and pesticides.

Five (5) borings were also installed in the City of Watsonville right-of-way bordering the Cal Spray site. Two borings were installed on Locust Street (CH32 and CH33), and three were installed on Riverside Drive (CH34, CH35, and CH36). Soil samples were collected from each boring at approximately 5-foot intervals from the ground surface to 15 feet bgs (up to 20 feet bgs in CH36), and analyzed for arsenic and lead. One grab groundwater sample was collected from boring CH35 and analyzed for arsenic, lead, and VOCs.

Two (2) additional borings (CH37 and CH38) were installed on Area 1 on November 3, 1998 as shown on Figure 4. CH37 was installed at approximately the same location as CH23 to collect an additional groundwater sample for arsenic and lead analysis. Soil samples were also collected from CH37 at 1.75 feet bgs and 7.5 feet bgs for the following analyses: arsenic, arsenic by TCLP, arsenic by STLC (7.5 feet bgs only), iron, lead, lead by TCLP, lead by STLC (1.75 feet bgs only), manganese, total organic carbon, pH, redox potential, sulfate, and sulfide. Boring CH38 was installed between CHl 1 and CH12 and soil samples were collected from 4 feet bgs and 10 feet bgs for the following analyses: arsenic, arsenic by TCLP, arsenic by STLC (4 feet bgs only), iron, lead, lead by TCLP, lead by STLC (4 feet bgs only), manganese, total organic carbon, pH, redox potential, sulfate, and sulfide. The TCLP and STLC analyses were collected to assess the hazardous characteristics of the soil in these areas. The iron, manganese, and general chemistry analyses were conducted to evaluate the transport behavior of arsenic and lead under the site-specific environmental conditions encountered at the site.

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SECTION 3 SUPPLEMENTAL REMEDIAL INVESTIGATION ACTIVITIES AND RESULTS

3.2.2 Area 2
Ten (10) borings (Ml - MlO) were installed on Area 2 to determine the extent of arsenic and lead on this property (Figure 4). Borings Ml through M6 were drilled during the December 1997 SI field activities. Based on the results from that sampling event, four additional borings, M7 through MlO, were installed on March 31, 1998 along the northwestern boundary of Area 2. Soil samples were collected from borings Ml through M6 at 5-foot intervals from the ground surface to lS feet bgs, and were analyzed for arsenic and lead.

Borings M7 through MlO were hand-augered to 2.S feet bgs, and soil samples were collected from depth intervals of 0.0 to 0.5 foot bgs, 1.0 to 1.5 feet bgs, and 2.0 to 2.5 feet bgs and analyzed for arsenic and lead. The deepest sample from boring MS was collected from between 2.5 and 3.0 feet bgs. A grab groundwater sample was also collected from MS and analyzed for arsenic, lead, and voes.

3.2.3 Area 3
Nine (9) borings (Pl - P9) were installed on Area 3 to assess if arsenic and lead have impacted the soil on this property (Figure 4). Pl through P4 were drilled during the December 1997 SI field activities. Based on the results from that sampling event, five additional borings, PS through P9, were installed in the southeast comer of Area 3 on March 31, 1998. Soil samples were collected from Pl through P4 at S-foot intervals from the ground surface to the water table, and were analyzed for arsenic and lead. Soil samples from borings PS through P9 were collected from depth intervals of 0.S to 1.0 foot bgs, 4.5 to 5.0 feet bgs, and 9.5 to 10.0 feet bgs, and were also analyzed for arsenic and lead. Two grab groundwater samples were collected from borings Pl and P3 and analyzed for arsenic, lead, and voes.

Two additional borings (PlO and Pll) were installed on November 4, 1998 to further define the horizontal extent of residues on Area 3. Soil samples from PlO were collected from between 0.6 to 1.1 feet bgs and between 4.5-5 feet bgs. Boring Pll was installed inside of the existing building. Samples were collected beneath the concrete slab from between 2.5 and 3 feet bgs and between 4.5 and S feet bgs and analyzed for arsenic and lead.

3.2.4 Area 4
Thirteen (13) hand auger borings (Zl - 213) to 1.5 feet bgs were installed on Area 4 on July 2, 1998, to assess if arsenic and lead have impacted the soil on this property (Figure 4). Two additional borings, Z4B and Z6B, were installed on November 4, 1998 to assess the vertical extent of arsenic and lead in the vicinity of borings Z4 and Z6. Soil samples were collected from borings Zl through Z13 at the surface and from between 1 and 1.S feet bgs, and were analyzed in a step-wise fashion for arsenic and lead. Ultimately, soil samples from all borings except ZlO and Z12 were analyzed. Soil samples from borings Z4B and Z6B were collected from between 4.5 to S.0 feet bgs and were also analyzed for arsenic and lead.

3.2.5 Area Adjacent to Area 4
Eight hand-auger borings (Sl through and SS) were installed on the property west of Area 4, located at 236 Locust Street on November 4, 1998, by Cambria Environmental, to assess if the soil on this property was impacted by former Cal Spray residues (Figure 4). These borings were installed to a total depth of 5 feet bgs, and soil samples were collected from SFO/SECT3 RIFS KS.DOC/981240012

SECTION 3 SUPPLEMENTAL REMEDIAL INVESTIGATION ACTIVITIES AND RESULTS between 0.5 and 1 feet bgs, and between 4.5 and 5 feet bgs. Soil samples were analyzed for arsenic and lead in a step-wise fashion, with the soil samples from borings Sl and S2 analyzed for arsenic and lead first. Soil samples from borings S3 through 58 were not subsequently analyzed because the results of samples from Sl and S2 indicated this property is not impacted by Cal Spray residues.

On September 20, 1999, hand-auger borings S3 through SS were reinstalled and soil samples were collected from between 0.5 and 1 feet bgs, and between 1.0 and 1.5 ft bgs. Soil samples were analyzed for arsenic and lead. These samples were collected to ensure that this property is not impacted by Cal Spray residues.

3.2.6 Background Soil Sampling
Five background soil samples were initially collected from three locations (soil samples Background #1, #2, and #3) near the Cal Spray site during the December 1997 investigation to determine the ambient, or background concentration of arsenic in soil in this area of Watsonville. These samples were analyzed for arsenic and lead. Additional background soil samples (samples Background #4 through #11) were collected via hand auger on August 29, 1999 from depths of 0 to 0.5 ft bgs, and 1 to 1.5 ft bgs at the locations shown on Figure 13.

Soil samples from Background #4 through #11 were analyzed for arsenic.

All soil samples were collected from publicly-owned, easily-accessible locations within 1-mile of the site. Background samples #1 through #9, and #11, were collected from the public right-of-ways adjacent to City-owned streets. Background #10 was collected from the southeast corner of the grounds of E.A. Hall Middle School, located at 201 Brewington Avenue, Watsonville, California.

3.3 Results
This section presents the sampling results from the supplemental investigation conducted at the Cal Spray site. Also presented is the methodology used to estimate the local background concentration of naturally-occurring arsenic in soil at the site. Soil boring logs are located in Appendix A to this report. Laboratory analytical reports are located in Appendix B.

The site-specific, DTSC-approved residential soil cleanup criteria for the Cal Spray site are as follows:
• The site background arsenic concentration for the Cal Spray site has been estimated as 18 mg/kg (as discussed in Section 3.3.9). Arsenic concentrations found to exceed 18 mg/kg during remediation, as determined by side-wall and bottom confirmation sampling, shall be remediated and handled in accordance to methods outlined in Section 5 of this report.
• A site-wide average concentration of 400 mg/kg for lead based on the 95% upper confidence limit, with no single lead concentration exceeding 840 mg/kg.

The rational and methodology for these cleanup criteria are presented in Sections 3.3.9 and

5.1 of this report. These criteria are used to assess the extent that Cal Spray residues, namely, arsenic and lead, have adversely impacted soil at the site. A letter from DTSC, dated October 18, 1999, confirming these cleanup criteria is included in Appendix C.

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SECTION 3 SUPPLEMENTAL REMEDIAL INVESTIGATION ACTIVITIES AND RESULTS

3.3.1Area1
Analytical results of soil samples collected from borings installed on Area 1 are presented in detail on Figure 14 and Tables 2 and 3.

The highest concentrations of arsenic in soil (up to 21,400 mg/kg) were previously detected in the northwest portion of the site, in the area defined by borings CH3, CHlO, CH12, and CH13. These borings were installed in the vicinity of the former Cal Spray manufacturing area, near the retort and furnaces (See Figure 12).

Borings CH21 and CH22 were drilled to determine if the deeper, native soil in this area is impacted by Cal Spray residues, and were installed adjacent to the locations of borings CH3 and CH13, respectively, to a total depth of 25 feet bgs. The 10-foot bgs sample from CH21 contained arsenic at a concentration 136 mg/kg. All other samples from these borings contained arsenic within the range of background concentration (18 mg/kg) and lead at concentrations below the cleanup criteria. These results indicate that the deeper native soil (below 10 feet bgs) in this area has not been impacted by former site activities.

Soil samples from borings CHl, CH11, CH14, CH17, CH18, and CH19, previously installed outside of the original Cal Spray manufacturing facility property boundary but within the current Area 1 property (see Figure 12), contained elevated levels of arsenic and lead at depths of 3 to 6.5 feet bgs. Boring CH25 was drilled adjacent to boring CH17 to a total depth of 22 feet bgs to determine if these residues extend below the shallow fill layer. The primary and duplicate soil samples from CH25at10 feet bgs contained arsenic at slightly elevated concentrations of 37.9 and 42.4 mg/kg. The 15-foot bgs sample contained arsenic at 15.7 mg/kg, thus the vertical extent of arsenic at this location appears to be about 10 feet bgs.

Lead does not exceed cleanup criteria below 2.5 feet bgs at this location. The deeper samples from borings CHl l, CH18, and CH25 exhibit the same pattern of decreasing arsenic concentrations with depth.

The north and east perimeters of the Area 1, as defined by borings CHS, CH20/CH27, CH28, CH29, CH35, and CH36, do not appear to be impacted by Cal Spray residues. Soil samples from these borings contained arsenic and lead at concentrations well below cleanup criteria.

Soil samples from borings installed along the southwestern portion of the Area 1 property boundary, as defined by borings CH2, CH9, CH23, CH24, CH32, CH33, CH34, and CH37 (see Figure 14), indicate that this area has been slightly impacted by Cal Spray residues. The low concentrations of arsenic and lead detected in soil samples collected from borings CH32 and CH33, located on Locust Street, confirm arsenic and lead have not migrated from the site in that direction. The 5-foot bgs sample from boring CH23 contained arsenic at 429 mg/kg; however, the sample from 10 feet bgs contained at 7.9 mg/kg. The 1-foot bgs sample from CH34, located adjacent to Riverside Drive, contained arsenic at a concentration of 59 mg/kg. The 1- and 3-foot bgs soil samples from CH2 contained arsenic at 95.8 mg/kg and 34.8 mg/kg, respectively. All soil samples collected from CH37 contained arsenic within the range of background concentration and lead at concentrations below the cleanup criteria.

Soil samples from borings installed in the center of Area 1, as defined by borings CHS, CH6, CH7, CH15, CH16, and CH26, indicate a random distribution of elevated concentrations of SFO/SECT3 RIFS KS.DOCl981240012 3-5

SECTION 3 SUPPLEMENTAL REMEDIAL INVESTIGATION ACTIVITTES AND RESULTS arsenic and lead. The shallow samples from borings CH16 and CH26 contained arsenic and lead at maximum concentrations of 755 mg/kg and 600 mg/kg; however, the deeper samples from all borings in this area exhibited a pattern of decreasing concentrations with depth.

Boring CH30 was drilled to a total depth of 31 feet bgs inside the existing building on Area 1 to determine if residues exist under the structure. Arsenic and lead were detected at 5.5 feet bgs at respective concentrations of 6,500 and 1,850 mg/kg. The samples collected above and below this depth (at 1, 10, and 13.5 feet bgs) contained arsenic within the range of background concentration and lead at concentrations well below the cleanup criteria. The extent of residues at this location appears to be limited to the soil at approximately 5 feet bgs.

Boring CH38 was drilled between CHl 1 and CH12, to a total depth of 13 feet bgs. Arsenic was detected at 4 and 10 feet bgs at respective concentrations of 180 and 240 mg/kg. Lead was detected at 7.2 mg/kg at 4 feet bgs and was not detected in the sample from 10 feet bgs.

3.3.2 Area 2
The analytical results of soil samples from Area 2 are presented on Figure 15 and in Table 4.

Elevated concentrations of arsenic were found in several borings on Area 2. Soil samples containing arsenic at concentrations above cleanup criteria are found in borings Ml, M2, M4, and M7 through MlO (Figure 15). The soil samples from borings M3, MS, and M6 contain levels of arsenic below the cleanup criteria and within the normal range of background concentrations, indicating the extent of arsenic appears to be limited to the northern half of Area 2. Lead was only detected in one boring (MIO) at levels above cleanup criteria; however, lead was detected at slightly elevated concentrations in all surface soil samples collected. To assess the extent of arsenic and lead to the west of Area 2, numerous borings were installed on Area 4, west of Area 2 (see Figure 4). Results of these samples are discussed in Section 3.3.4.

The vertical extent of arsenic and lead appears to be limited to shallow soil above 3 to 5 feet bgs, as shown in all borings except M2, M9, and MlO. Arsenic was detected in M2 at concentrations of 300 mg/kg, 109 mg/kg, and 156 mg/kg in the samples from 0.5 feet bgs, 5 feet bgs, and 10 feet bgs, respectively. The sample from 15 feet bgs contained arsenic at 1.92 mg/kg, indicating the vertical extent of residues in this area is likely between 10 and 15 feet bgs.

Borings M9 and MIO were both installed to 2.5 feet bgs along the northwestern edge of Area 2. Arsenic was detected at concentrations above the acceptable range of background concentration in all soil samples from each boring. Samples from boring MIO contained the maximum levels of arsenic and lead on this area, up to 1,790 mg/kg, and 1,320 mg/kg, respectively. These borings were only completed to 2.5 feet bgs; thus the vertical extent of residues in this area could not be determined.

3.3.3 Area 3
The analytical results of samples from Area 3 are presented on Figure 15 and in Table 5.

SFO/SECT3 RIFS KS.DOC/981240012

SECTION 3 SUPPLEMENTAL REMEDIAL INVESTIGATION ACTIVmES AND RESULTS Elevated concentrations of arsenic and lead were found in the southern comer of Area 3 with a slightly elevated concentration detected in P2 (0.5-1 ft bgs) (79.4 mg/kg) located on the northern side of Area 3. The primary extent of elevated arsenic and lead is defined by borings P4, P5, P6, and P7 (Figure 15) and appears to be limited to a "hot spot" area located in the southwest corner of Area 3.

The 5-foot bgs sample from P4 contained arsenic and lead at respective concentrations of 4,740 mg/kg and 30S mg/kg. The underlying soil sample from 10 feet bgs had detectable but low concentrations of arsenic and lead (4.42 and 5.3 mg/kg, respectively), indicating the vertical extent of arsenic and lead at this location is between 5 and 10 feet bgs.

The shallow soil samples (1-foot bgs) from PS, P6, and P7 contained slightly elevated concentrations of the arsenic and lead at respective concentrations of 91.4 mg/kg and 231 mg/kg (PS); 179 mg/kg and 228 mg/kg (P6); and 122 mg/kg and 310 mg/kg (P7). The 5-foot bgs sample from each of these borings contained arsenic within the range of background concentration and lead at concentrations below the cleanup criteria, indicating the impact of these metals in this area is limited to the soil above S feet bgs.

Soil samples from borings P3, P8, P9, PlO, and Pll contained arsenic at concentrations within the range of background concentrations and lead at concentrations below the cleanup criteria. The shallow samples from P3, P9, and Pll contained arsenic at concentrations slightly above the background concentration of 18 mg/kg. The original and duplicate soil samples from boring Pll at 2.5 feet bgs contained arsenic at concentrations of 26 and 21 mg/kg, respectively. The original soil sample was reanalyzed and the subsequent result was 22 mg/kg. This variation of results can be attributed to inherent heterogeneities within soil samples, and analytical accuracy and precision.

The horizontal extent of Cal Spray residues on Area 3 appears to be limited to the area defined by borings P2, P4, PS, P6, and P7.

3.3.4 Area 4
The analytical results of samples from Area 4 are presented on Figure 15 and in Table 6.

Arsenic was found at concentrations exceeding the acceptable range of background concentrations in soil samples from borings Zl, Z3, Z4, ZS, Z6, Z7, Z8, and Z13. The highest concentrations are found along the northern perimeter of the property in the 1 to 1.5-foot bgs samples from borings Z4 (2,810 mg/kg), ZS (286 mg/kg), and Z6 (157 mg/kg). Soil samples collected from 5 feet bgs in borings Z4B and Z6B did not contain detectable concentrations of arsenic, indicating the vertical extent of residues in this area is limited to the soil above S feet bgs. Borings Zl and Z13, located on the southern perimeter of Area 4, contained arsenic at concentrations of 32 mg/kg and 23.l mg/kg, above the backgronnd concentration of 18 mg/kg.

Lead was detected at elevated levels in all surface soil samples, however, lead was only detected at a concentration exceeding cleanup criteria in one sample: Z4 (1to1.5 feet bgs) at 982 mg/kg. Soil samples collected from 5 feet bgs in boring Z4B contained lead at a concentration of 6.9 mg/kg, further indicating the vertical extent of residues in this area is limited to the soil above 5 feet bgs. The initial analytical result from soil sample Z7 from Oto

0.5 feet bgs was 3,010 mg/kg, however, this value is believed to be inaccurate, because this SFO/SECT3 RIFS KS.DOC/981240012 3-7

SECTION 3 SUPPLEMENTAL REMEDIAL INVESTIGATION ACTIVITIES AND RESULTS result was approximately a factor of ten higher than that found in all surrounding samples.

This sample was reanalyzed and the resulting concentration was 307 mg/kg.

3.3.5 Area Adjacent to Area 4
The analytical results of soil samples from the area adjacent to Area 4 are presented in Table 7.

All samples, except S2 (2.5 - 3 ft bgs), contained arsenic below the background arsenic concentration of 18 mg/kg. All samples contained lead at concentrations below the cleanup criteria. Arsenic was detected in S2 (2.5 - 3 ft bgs) at 21 mg/kg. As discussed below in Section 3.4, this property does not appear to be impacted by Cal Spray residues. Therefore, the western extent of Cal Spray residues is limited to Area 4, and the southeast comer of Area 3.

3.3.6 Groundwater Results
Groundwater analytical results are presented in Table 8. Twelve (12) grab groundwater samples were collected during the SI as follows: eight groundwater samples (includes one duplicate sample) were collected from Area 1; one groundwater sample was collected from Area 2; and three groundwater samples (includes one duplicate sample) were collected from Area 3. All of the groundwater samples were collected by bailer from a temporary 0.75-inch diameter PVC well casing with 5-feet of 0.010-inch PVC screen. All samples were transferred to unpreserved containers and filtered through a 0.45 micron filter in the laboratory prior to analyses. Groundwater samples were collected from a fully saturated zone between 25 and 30 feet bgs.

As stated in Section 2.1.1, the groundwater flow direction at the site is presumed to be southwest towards Monterey Bay. The exact groundwater flow direction at the site is not known since there are no monitoring wells at the site to measure the accurate water elevations. Therefore we cannot provide site-specific information about the groundwater gradient and flow direction. However, numerous published reports on the hydrogeology of the Pajaro Valley agree that shallow groundwater flow in the Valley in vicinity the Cal Spray site is southwest towards Monterey Bay (Geology and Groundwater, Pajaro Valley Area, California, USGS Open-File Report, June 27, 1972; and, Geohydrology and Mathematical Simulation of the Pajaro Valley Aquifer System, Santa Cruz and Monterey Counties, California, USGS, Water-Resources Investigations Report 87-4281). Further, the direction of shallow groundwater flow is typically governed by topography, and the topography in the area of the Cal Spray site slopes southwest towards Monterey Bay, indicating the direction of groundwater flow is southwest towards the Bay. Since, groundwater samples were collected from 9 separate locations, the geographical spacing of these sample locations is such that at least one sample would have been collected downgradient of the source area, regardless of groundwater flow direction. Assuming the groundwater flow is towards the southwest, groundwater samples CH23, CH25, and CH37 were collected downgradient from the locations of highest soil concentrations of arsenic and lead.

Arsenic was detected in four grab groundwater samples (one was upgradient of the site at Pl) at concentrations well below the arsenic MCL of 50 µg/L. The maximum arsenic concentration in groundwater was 11 µg/L in the duplicate sample from CH37.

SFO/SECT3 RIFS KS.DOC/981240012 3-8

SECTION 3 SUPPLEMENTAL REMEDIAL INVESTIGATION ACTIVITIES AND RESULTS Lead was initially detected in the groundwater sample collected from boring CH23 at 46 µg/L, exceeding the lead action level of 15 µg/L. The action level is the concentration of lead that must not be exceeded at a customer tap. The action level is exceeded if the concentration of lead in more than 10 percent of tap water samples is greater than 15 µg/L.

Lead was also detected in upgradient groundwater samples from Pl and P2; however, the concentrations were below 15 µg/L.

The detection of lead in the groundwater samples is suspect and is likely due to the extremely turbid nature of the samples. Due to the fine-grained nature of the sediments, and the methodology used to collect the grab-groundwater samples, the samples were approximately 50% sediment and 50% groundwater. Lead is typically immobile in subsurface soil and groundwater.

Additional groundwater samples were collected from boring CH37, installed adjacent to the location of CH23, to assess if the groundwater in this area is indeed impacted by lead. Lead was not detected ( <5 µg/L) in either the primary or duplicate groundwater samples from this boring, confirming the groundwater beneath the site has not been impacted by the lead.

One VOC was detected in 1of9 groundwater samples. The groundwater sample from CH35 contained 1,2-dichloroethane at 2.4 µg/L, exceeding the MCL of 0.5 µg/L. 1,2-DCA is a commonly used solvent and is not a chemical associated with the previous manufacturing processes of the Cal Spray site. Further, CH35 is located outside of the Area 1 property boundary, and is also located well outside of the former boundary of the Cal Spray property (See Figure 12). Therefore the source of this chemical cannot be attributed to this site.

3.3.7 Strychnine Soil Sampling Results
A total of fourteen (14) soil samples from the Cal Spray site have been analyzed for strychnine, including one sample from Area 2 (MIO at 2 to 2.5 feet bgs), and one sample from Area 3 (PS at 0.5 to 1 foot bgs). Strychnine was not detected in any of these soil samples. Analytical data sheets for the strychnine samples are included in Appendix B.

Three (3) of the samples were collected by ASE during the June 1996 investigation, and were analyzed for strychnine by Alpha Chemical and Biomedical Laboratories, Inc, in Petaluma, California. Strychnine was not detected in these three samples collected from soil described as: orange platy material, white material, and soil with crystals (See Table 1).

Seven (7) of the soil samples from Area 1 (from borings CHI through CH7) were collected during the September 1996 investigation. Irvine Analytical Laboratories, Inc., in Irvine California, analyzed these samples for strychnine. These borings were drilled in each comer of the site (CH1-CH4), and in the center of the site (CH5-CH7). Strychnine was not detected in these samples (Table 2).

Two of the soil samples were collected from boring CH26, installed at the former location of the strychnine tanks: CH26 (0-0.5 feet bgs) and CH26 (14.5-15 feet bgs). The CH26 (14.5-15 feet bgs) sample was collected by DTSC on December 2, 1997. The California Department of Toxic Substances Control-Hazardous Materials Laboratory (HML) analyzed both these samples. Strychnine was not detected in either of those samples (Table 2).

SFO/SECT3 RIFS KS.DOC/981240012 3-9

SECTION 3 SUPPLEMENTAL REMEDIAL INVESTIGATION ACTIVmES AND RESULTS DTSC collected two additional split soil samples to be analyzed for strychnine on March 31, 1998: MlO (2-2.5 feet bgs), and P5 (0.5-1 feet bgs). HML analyzed these samples and strychnine was not detected in either of those samples (Tables 4 and 5).

The sampling locations provided adequate coverage of the site to test for the presence of strychnine, particularly the samples collected at the former strychnine tanks. The results of the strychnine sampling demonstrate that strychnine is not a COPC at the Cal Spray site.

3.3.8 Background Soil Sampling
Analytical results from the offsite background soil samples are presented on Table 9. The locations of the samples are shown on Figure 13.

Arsenic concentrations from the 22 offsite background soil samples (includes one duplicate sample) ranged from 3.1to18.9 mg/kg.

Lead concentrations from 5 offsite background soil samples ranged from 9.0 to 477 mg/kg.

The lead values of the surface soil samples from Background 2 and Background 3 are elevated above published background concentrations for California soils (Bradford et al., 1996). These elevated concentrations are similar to the concentrations detected in the surface soil samples from borings CH34 and CH35 (located adjacent to Riverside Drive), and in all of the surface samples collected from Area 2 and Area 4 (excluding MlO). The ubiquitous nature of lead in surface soils is well documented, and these samples further support the conclusion that lead on adjacent properties may be from sources other than the Cal Spray site.

3.3.9 Estimation of Arsenic Background Concentration in'Soil The results from the offsite background soil samples indicate that naturally occurring arsenic is present in the soil at concentrations higher than the current EPA Region IX, May 1, 1998 arsenic Preliminary Remediation Goals (PRGs) of 0.38 mg/kg (residential) and 3.0 mg/kg (industrial) (EPA, 1998). When natural background concentrations of compounds of concern are higher than the PRGs, the appropriate clean-up goal is the local background concentration. The local background arsenic concentration was estimated following CAL/EPA DTSC and US EPA methodology and guidelines. A detailed analysis of the methods used to estimate the background arsenic concentration is presented in Appendix E, and is summarized below.

Background soil samples are variable and typically reflect a range of values. The CAL/EPA DTSC Final Policy report entitled "Selecting Inorganic Constituents as Chemicals of Potential Concern at Risk Assessments at Hazardous Waste Sites and Permitted Facilities" (DTSC, 1997) states that is it appropriate to chose the upper end of the background, or ambient data set distribution. The data set used to estimate the background arsenic concentration consisted of 21 offsite soil samples (see Sections 3.2.6 and 3.3.8).

Two estimators of the upper end of the background data set distribution were used:

1. The 95% UCL on the 95lh percentile;

2. The non-parametric 95lh quantile.

SFO/SECT3 RIFS KS.DOC/981240012 3-10

SECTION 3 SUPPLEMENTAL REMEDIAL INVESTIGATION ACTIVITIES AND RES UL TS The 95% UCL on the 95th percentile of the background data set, based on a normal distribution is 17 mg/kg. The 95% UCL on the 95th percentile based on a lognormal distribution is 22 mg/kg. (As shown in Appendix E, the data set exhibits both a marginally normal and lognormal distribution).

The 95th quantile of the background data set is 18.26 mg/kg (the calculations for determining the 95th quantile are described in detail in Appendix E). This value corresponds with the range of concentrations determined by the 95th UCL on the 95th percentile of 17 to 22 mg/kg, presented above. These values represent the upper range of ambient, or background arsenic concentrations in Watsonville, within 1 mile of the Cal Spray site.

Based on these estimates, an appropriate and conservative background arsenic concentration for the Cal Spray site is 18 mg/kg.

This background concentration is similar to other Northern California arsenic background concentrations and cleanup goals. For example, the DTSC-approved background arsenic concentration for the Cal-Trans Cypress Freeway Corridor was 19 mg/kg. Also, the BART /SFO Extension has a Regional Water Quality Control Board (RWQCB) approved unrestricted reuse criteria for arsenic in soil of 19 mg/kg.

Lead ambient concentration calculations to establish a background level were not performed because the cleanup criteria for lead is based on blood level calculation as reflected in the EPA residential PRC of 400 mg/kg, with no point to exceed 840 mg/kg. However, literature values indicate the concentration of naturally occurring lead in California range from 12.4 mg/kg up to 97.1 mg/kg (Bradford et al., 1996).

3.3.1 O Well Survey
A well survey was conducted to identify all recorded domestic, municipal, irrigation, and other wells within 1h-mile of the site. There are three City of Watsonville water supply wells within a 0.5-mile radius of the site: Wells #7, #10, and #15 at locations shown on Figure 13.

These wells are all screened in the basal unit of the alluvial aquifer, between 100 and 150 feet bgs. The average monthly production rate for each of these wells during 1997 was approximately 30 million gallons.

3.3.11 Deviations from Work Plan
The following deviations from the SI work plan occurred during implementation of the SI field work:
• All groundwater samples were filtered by the analytical laboratory instead of in the field. The laboratory filtered all samples immediately upon receipt of the samples. • Groundwater parameters of temperature, pH, specific conductivity, and dissolved oxygen were not measure in the field prior to sampling. Reason: These parameters are normally measured when purging and samp~g a monitoring well to ensure that samples collected from a well are representative of the groundwater. Purging removes the 'stagnant' or standing water from the screened zone of a permanent monitoring well.

The groundwater samples at the Cal Spray site were collected immediately after installing temporary well casings, thus all groundwater collected was from the aquifer formation and had no time to 'stagnate'.

SFO/SECT3 RIFS KS.DOC/981240012 3-11

SECTION 3 SUPPLEMENTAL REMEDIAL INVESTIGATION ACTIVmES AND RESULTS • The groundwater sample from CH26 was collected from the tip of the soil sampling tool.

Reason: this boring experienced flowing sands during the attempt to place the temporary well casing. A groundwater sample was unable to be collected from the PVC well casing. Upon retrieving the sampling tools, it was apparent that sufficient water was available for one groundwater sample for arsenic and lead, thus it was collected.

Other parameters slated for this sample (VOCs) were not analyzed due to lack of sample.
• A groundwater sample was collected from CH25, which was not specified in the work plan. Reason: Because the groundwater sample from CH26 was suspect and because DTSC was unable to collect a split sample from CH26, it was agreed upon by CH2M HILL and DTSC that an additional groundwater sample be collected from CH25, which is approximately 80 feet downgradient from CH26.
• Boring CH31 (inside of existing Area 1 building) was not completed. Reason: Drilling refusal occurred as a result of a concrete foundation encountered beneath the existing building foundation.

3.4 Conclusions
The results of the SI combined with those from previous investigations have indicated that lead and arsenic in soil are the only constituents of potential concern at the Cal Spray site.

Groundwater is not adversely impacted by Cal Spray residues. An evaluation of the analytical data collected during the field investigations (combined with a calculated background arsenic concentration of 18 mg/kg) indicates that the horizontal extent of arsenic- and lead-impacted soil at the Cal Spray site is limited to Area 1, the northern half of Area 2, the southern comer of Area 3, and southern and northern portions of Area 4. The vertical extent of impacted soil is limited to the shallow soil and fill overlaying the native silty clay soil. With the exception of limited areas on Area 1 and Area 2, arsenic- and leadimpacted soil is found at maximum depths of 5 to 6 feet below grade.

It is recognized that a few site samples slightly exceed the 18 mg/kg background arsenic concentration. The samples that slightly exceed 18 mg/kg and their locations are as follows:
• P3 (0.5 - 1 ft bgs) 19.3 mg/kg - Collected from beneath the asphalt-covered parking area in southwest portion of Area 3
• P9 (0.5 -1 ft bgs) 21.2 mg/kg - Collected from beneath the asphalt-covered parking area in southeast portion of Area 3
• Pll (2.5- 3 ft bgs) 26/2V22 mg/kg (original/duplicate sample/re-analyzed original sample)- Collected from beneath the concrete slab, beneath the existing building on Area 3
• 52 (0.0-0.5 ft bgs) 21 mg/kg - Collected from beneath asphalt-covered parking area of the property adjacent to Area 4 (236 Locust Street)
These concentrations exceed the proposed arsenic background concentration, however, they are still within the potential range of arsenic background concentration. The background data set 95th UCL on the 95th percentile tolerance interval is 22 mg/kg, based on a lognormal distribution (see Section 3.3.9 and Appendix E for details).

SFO/SECT3 RIFS KS.DOC/981240012 3-12
• j
..

SECTION 3 SUPPLEMENTAL REMEDIAL INVESTIGATION ACTIVffiES AND RESULTS Further, as discussed in detail in Appendix E:
• The relative percent differences (RPDs) between arsenic duplicate samples and original samples were calculated to provide a measure of laboratory accuracy in quantifying the amount of arsenic present in soil. The arsenic concentrations detected in the four samples of concern are close enough to the background arsenic concentration of 18 mg/kg that they are within the range of analytical uncertainty of extracting and quantifying arsenic in soil
• The data set populations of Area 3 and the property adjacent to Area 4 were compared to the background data set population. The population to population comparison indicated there are no statistically significant differences between the data sets These results indicate the areas represented by soil samples P3, P9, Pll, and S2 are within the potential range of arsenic background concentration and do not appear to be adversely impacted by Cal Spray site residues. These areas do not warrant removal or institutional controls.

Lead was detected at elevated concentrations in numerous surface soil samples collected from Areas 1, 2, and 4. The analytical results from the surface soil samples from borings CH35, M3, MS, M6, Zl, Z2, Z9, Z13, and Zll do not match the pattern exhibited by soil samples collected in areas impacted from historic Cal Spray activities. Specifically, these soil samples contained lead at elevated concentrations but did not contain elevated concentrations of arsenic. All other soil samples associated with Cal Spray site residues contain elevated concentrations of both lead and arsenic. If the source of the lead at these locations was from the Cal Spray site, and the lead was transported by grading operations or historic flood waters, then these samples would also contain elevated concentrations of arsenic.

None of the samples in question above exceed the lead cleanup criteria. However, the potential source of the lead was evaluated. Elevated concentrations of lead in surface soil may be caused by many environmental factors. The source of elevated lead in the surface soil samples from Area 2 and Area 4 (M3, M4, and MS; and Zl, Z2, Z9, 213, and Zll) may be attributed to lead-based paint from the houses located on the properties at or near the same locations where these soil samples were collected. Records show houses were present on these properties from at least 1920. The house on Area 2 was demolished in 1989, after being damaged beyond repair by the Loma Prieta earthquake; the house located on Area 4 is still present. Soil contamination from lead-based house paint is a common occurrence, particularly from older homes. The following information substantiates this conclusion:
"Lead was widely used as a major ingredient in most interior and exterior oil-based paints prior to 1950. Lead compounds continued to be used as corrosion inhibitors, pigments, and drying agents from the early 1950's. In 1972, the Consumer Products Safety Commission limited lead content in new residential paint to 0.5% (5,000 mg/kg) and, in 1978, to 0.06% (600 mg/kg). The Department of Housing and Urban Development (HUD) estimates that three-quarters of pre-1980 housing contain some lead-based paint. The occurrence, extent and concentration of lead-based paint increase with the age of the housing. Ninety percent of privately-owned housing units built before 1940 contain some lead-based paint; 80% of 1940-1959 units; and 62% of 1960-1979 units." (Comprehensible and Workable Plan for the Abatement of SFO/SECT3 RIFS KS.DOC/981240012 3-13

SECTION 3 SUPPLEMENTAL REMEDIAL INVESTIGATION ACTIVmEs AND RESULTS Lead-Based Paint in Privately-Owned Housing: A Report to Congress, U.S.

Department of Housing and Urban Development, Washington, DC, December 7, 1990).
"Common sources of lead in residential soil include deteriorating exterior lead-based paint and historical airborne deposition onto the soil surface as the result of point source emissions or leaded gasoline. These sources have added substantially to the naturally occurring lead in soils, which generally range from 5 - 50 parts per million (mg/kg)." (U.S. Environmental Protection Agency (1989) Review of the National Ambient Air Quality Standards for Lead: Exposure Analysis Methodology and Validation. U.S. EPA Office of Air Quality Planning and Standards, RTP, NC. EPA450 /2- 89/011).

The report "A Survey of Lead Contamination in Soil Along Interstate 880, Alameda County, California", published in the American Industrial Hygiene Association Journal, September, 1993, concludes that likely urban sources of lead include gasoline emissions and leaded paint from the exterior of homes. This report suggests that samples should be taken more than 20 feet away from homes to eliminate the possibility of lead-based paint contamination. (Note: All of the samples in question from Area 2 and Area 4 (M3, M4, and MS; and Zl, Z2, Z9, Z13, and Zll), were taken within 20 feet of the location of the homes on those properties).

The surface soil sample from boring CH35 also contained elevated lead with a below background concentration of arsenic. Boring CH35 was collected 10 feet away from Highway 129 (Riverside Drive) from the dirt planter area between the sidewalk and the Cal Spray property fence. Highway 129 is a state highway built in the 1960's with a high traffic volume. Therefore, the source of lead from these samples may be attributed to vehicle emissions.

VOCs, arsenic, and lead were detected in grab groundwater samples collected from the Cal Spray site. One out of the nine groundwater samples analyzed for VOCs, contained VOCs (which were not used during the period of pesticide manufacturing). Arsenic and lead were detected in four out of twelve grab groundwater samples from the sites; however, only one sample contained lead above the action limit. Arsenic was not detected above the MCL concentration in any of the groundwater samples. The data from all four samples are considered suspect due to the turbid nature of the groundwater samples collected.

Additional groundwater samples were collected to confirm the presence of lead in groundwater beneath the site. The subsequent groundwater samples indicate that lead is not present in the groundwater beneath the site.

SFO/SECT3 RIFS KS.DOC/981240012 3-14

SECTION 4
Conceptual Site Model

4.1 Conceptual Site Model
Data from previous site investigations (Section 2) and the SI (Section 3) were used to develop a conceptual site model that identifies the nature and extent of Cal Spray residues, potential exposure pathways, and potential receptors that may be impacted. This information is used to determine the applicability of risk-based clean-up criteria.

4.1.1 Nature and Extent of Cal Spray Residues
As previously discussed, the Cal Spray site has been separated into four areas designated Area 1, Area 2, Area 3, and Area 4. The historical location of the Cal Spray operations is located at 135 Walker Street (Area 1). Areas 2 and 3 coincide with two parcels adjacent to the 135 Walker Street property. Area 4 is adjacent to Areas 2 and 3.

Cal Spray produced lead arsenate insecticide spray from 1908 through 1929 to control insects on fruit trees. Lead arsenate was the only insecticide that controlled the coddling moth in apple orchards and was considered a good product because of its low solubility (retention as a dust on leaves and soils), low phytotoxicity, and strong control on insect populations (Eisler, 1994, and Adriano, 1986). It is a strong residual pesticide because both lead and arsenic are not readily solubilized from this compound (Handbook of Chemistry and Physics). Lead arsenate breaks down very slowly with an approximate half-life (time for half of the concentration to disperse) of 16 years (Eisler, 1994) compared to days for organic arsenic and organophosphate compounds. Lead arsenate is still being used today to protect orchards from chewing insects.

Residues from historical manufacturing activities currently exist in soil. The chemicals of potential concern (COPCs) are arsenic and lead, and they appear to be limited primarily to the shallow soil (fill) between 0 and 6 feet bgs. Arsenic and lead have been detected in soil at concentrations up to 21,000 and 11,300 mg/kg, respectively. High concentrations of arsenic and lead are found in the western portion of Area 1 near the former retort and furnaces (see Figure 14). In this area, arsenic is found at concentrations above the established background concentration of 18 mg/kg at depths of up to 10 feet bgs.

Concentrations of arsenic and/ or lead exceeding background concentration and/ or cleanup criteria are also found in the shallow fill soil in the southeastern portion of Area 1, near borings CHl, CH17, CH18, and CH19. This area does not correspond with former site facilities, and elevated levels of arsenic and lead in this area are likely the result of grading and fill operations that took place in the 1950's, and again later in the 1970's. The site has been paved with asphalt since the 1950s. The northeast portion of Area 1, defined by borings CH20, CH27, CH28, and CH29, is not impacted by Cal Spray residues. Elevated levels of TRPH (up to 3,440 mg/kg in CH20) were detected in borings CH19, CH20 and CH27 at depths of 8 to 10 feet bgs.

SFO/SECT4.DOCl981320008 4-1

SECTION 4 CONCEPTUAL SITE MODEL AND IDENTIFICATION OF CLEAN-UP CRITERIA A pattern exists in the distribution of elevated arsenic and lead at the Cal Spray site. Most samples containing elevated levels of lead (greater than 1,000 mg/kg) also contain arsenic at elevated levels (greater than 500 mg/kg). The reverse, however, is not true. For example, 14 soil samples with elevated arsenic levels contained lead at lower concentrations (see Table 2).

Arsenic and lead were detected at elevated levels in shallow soil on the three adjacent properties towards the west: Areas 2, 3, and 4. The highest concentrations of arsenic and lead in soil were detected immediately adjacent to the property boundary with the former Cal Spray site (see Figure 15). The concentrations in soil decrease with distance away from the Cal Spray site.

Arsenic and lead were detected in Area 2 soil at concentrations of up to 1,790 and 1,320 mg/kg, respectively. The extent of elevated concentrations of arsenic appears to be limited to the northern half of the property, northeast of boring M3 (see Figure 15). Soil samples from borings M3, MS, and M6, located adjacent to Locust Street, indicate the southern portion of the property is not impacted by Cal Spray residues. Lead is present at levels exceeding cleanup criteria in only three samples (two from MlO and one from HA3).

Arsenic and lead were detected in Area 3 soil at concentrations of up to 4,740 and 310 mg/kg, respectively. The extent of arsenic and lead on Area 3 is limited to the northeastern and southeastern portions of the property as defined by borings P2, and P4 through P7 (see Figure 15). Arsenic was detected at elevated levels in borings P2, P4, PS, P6, and P7.

Arsenic and lead were detected in Area 4 soil at concentrations of up to 2,810 and 982 mg/kg, respectively. The extent of arsenic and lead on Area 4 is limited to the area north of boring Z9 (see Figure 15), with two minor exceedances of arsenic in Zl and Z13. The original analysis for lead in soil sample Z7 (0-0.5 feet bgs) was 3,010 mg/kg, however it is believed that this result may be inaccurate. This concentration is approximately a factor of ten higher than that detected in all surrounding samples, The sample was subsequently reanalyzed, with a resulting concentration of 307 mg/kg.

The residues detected on these adjacent properties (Areas 2, 3, and 4) were most likely transported from the Cal Spray site by wind, storm water runoff, and flooding. Flooding of the Watsonville area was common prior to 1930. Levees built along the Pajaro River around 1930 prevented the river from flooding during most storm events after 1930. Additional protection from flooding resulted when the Army Corps of Engineers levee system was completed in 1949. Watsonville has not been extensively flooded since 1938. Research on this issue confirms major floods occurred in March 1911; January 1914; February 1917; and February 1938. The information acquired from historic accounts indicates that these floods were severe enough to cover the area of the site with floodwaters. A report entitled Flooding and South Watsonville, 1909-1950, by Sandy Lydon, Professor of History at Cabrillo College (August, 1998) documents the flooding events of the Watsonville area and is included as Appendix D.

Groundwater beneath the Cal Spray site is not impacted by arsenic and lead. One groundwater sample from boring CH23 did contain lead at 46 µg/L (greater than the lead action limit of 15 µg/L); however this result is probably due to an extremely turbid grab groundwater sample. Groundwater from this area was re-sampled and did not contain SFOISECT4.DOCl981320008 4-2

SECTION 4 CONCEPTUAL SITE MODEL AND IDENTIFICATION OF CLEAN-UP CRITERIA detectable concentrations of lead. Arsenic and lead were detected in grab groundwater samples from two other locations; however, the concentrations were below the arsenic MCL and the lead action level. One voe (1,2-dichloroethane) was detected once in one of 9 groundwater samples at a concentration above the MCL. The source of this compound in unknown, although it is unlikely that the source was from original Cal Spray manufacturing activities as VOCs were not used during Cal Spray operations.

4.1.2 Site Stratigraphy
Area 1 and Area 2 are covered with asphalt pavement. The site stratigraphy is characterized by 4 to 6 feet of surficial fill underlain by up to 30 feet of clay. The fill material is composed primarily of sandy silt, and in some cases, inert debris such as wood and brick fragments.

Below the fill layer is a dense, organic rich blue-gray to black clay that varies in thickness from 2 to 6 feet. This organic rich clay has a very strong hydrogen sulfide (H2S) odor, indicating sulfide-reducing conditions. Underlying the black clay is a 5- to 10-foot thick layer of soft to firm silty clay. Several borings encountered perched groundwater at depths as shallow as 12 feet bgs, however, the depth of the water table beneath the site varies from approximately 20 to 30 feet below ground surface.

A 5 to 20-foot thick layer of sand and sandy gravel is found below the clay under the northern portion of Area 1 and beneath Area 3. This sandy layer is absent from borings installed in the southern portion of the site. The cross-sections shown in Figures 6 through 9 present a detailed interpretation of the site stratigraphy.

4.1.3 Fate and Transport Properties of Arsenic and Lead Both lead and arsenic have a very limited mobility in soil and subsurface environments.

Further, lead arsenate produced by Cal Spray was especially formulated to have a low solubility. The concentrations of arsenic and lead detected in the shallow soil at the Cal Spray site, coupled with the absence of arsenic and lead in deeper soil samples, are evidence of the low solubility of lead arsenate and the limited mobility of arsenic and lead. The behavior of arsenic and lead under the various environmental conditions encountered at the site is discussed below. Table 10 presents the soil geochemical data collected from four soil samples during the November 1998 sampling event.

OXIDIZING CONDITIONS
Oxidizing conditions are present in the soil and sediments comprising the fill material to at least a depth of 10 feet as evidenced by:
• The measured redox potential ranges from +350 to +470 mV (Table 10); a typical range for an oxidized soil under atmospheric oxygen conditions (oxidizing conditions are defined by redcix potential between + 100 to +500 millivolts [m V]); • Sulfate is the major ion in all four samples, ranging from 57 to 730 mg/kg, while sulfide is present at much lower concentrations (10 and 46 mg/kg) in two of four samples and not detected in the other two samples. If the fill material was under reducing conditions (-100 mV or lower), sulfate would be less than 20 mg/kg and sulfide would be the dominant ion.

SFO/SECT 4.DOC/981320008 4-3

SECTION 4 CONCEPTUAL SITE MODEL AND IDENTIFICATION OF CLEAN-UP CRITERIA The dominance of sulfate, low to neutral pH, and high iron (Table 10), and the presence of both sulfide and hydrogen sulfide (hydrogen sulfide odors were detected in soil during sampling activities) also suggest that:
1- the sulfate is probably generated by the oxidation of iron sulfide; and

2. there is little water moving through the fill and sediments. Sulfate is likely present as either calcium sulfate (gypsum) or iron sulfate (jarosite), both of which are quite soluble.

Any water movement through the fill must be minimal for the sulfate to still be present.

Furthermore, as it has been over 60 years since lead arsenate was processed at the site, the elevated nature of the arsenic, coupled with the absence of arsenic in deeper soil samples, indicates there has been little arsenic movement at the site. This further supports the assumption that there is little water movement through the fill and, particularly through the clay. Because the site has been covered with an asphalt cover since the early 1950's, infiltration of water into the fill has been significantly reduced.

Oxidizing conditions in the fill material will greatly limit the mobility of both arsenic and lead. Both elements are strongly adsorbed by iron oxyhydroxide; the ubiquitous yellow to yellow-brown and brown compound that colors soils and sediments under oxidizing conditions (EPA, 1997, Mok and Wai, 1994, Prasad, 1994 and Adriano, 1986). Iron is present in site soil at concentrations ranging from 1.6 to 2.0 percent (16,000 to 20,000 mg/kg) in the fill and clay (Table 10), indicating an abundance of available adsorbtion media to adsorb, and thus immobilize, both arsenic and lead.

Arsenic and lead are also both absorbed/ adsorbed by organic matter coating aquifer particles. This coating is composed of manganese oxyhydroxides (black coloration) and aluminum oxyhydroxides (clays on the soil and sediment particles). Organic matter, particularly humic acid, is second only to iron oxyhydroxide in the ability to absorb arsenic.

This is of particular importance because total organic carbon (TOC) is detected at high concentrations in both the fill (1,100 to 1,800 mg/kg) and the clay (510 to 520 mg/kg).

Manganese and aluminum oxyhydroxides adsorb at a lower rate than either iron oxyhydroxide or organic matter. Manganese is present at concentrations ranging from 95 to 560mg/kg.

Under oxidizing conditions, arsenic is present as arsenate, the oxidized, pentavalent state of arsenic; the least soluble, least mobile, and least toxic form of arsenic. Arsenate is a negatively charged ion, occurring as H2AS04 - and HAs04 2-, and these species are likely present in the oxidized fill soil of the site. These ions are rapidly adsorbed (within minutes) to iron oxyhydroxide (Prasad, 1994 and Mok and Wai, 1994).

Under oxidizing conditions, lead will be strongly adsorbed to iron oxyhydroxide as well.

Lead also forms a carbonate mineral that significantly controls its solubility and mobility.

Carbon dioxide created in the soil by microbial activity reacts with water to form dissolved carbonate above a pH of about 4.5. Lead forms a lead carbonate mineral (cerrusite) which is extremely insoluble, thus immobile. Cerrusite commonly controls the lead concentration to less than about 10 µg/L in oxidized soil, and reduced soil and sediment of wetlands.

Iron oxyhydroxide will become partially dissolved where the pH is as low as 4.2 (as measured in CH38 at 4 feet bgs) but this dissolution will be controlled to less than 5.6 mg/l SFO/SECT 4.DOC/981320008

SECTION 4 CONCEPTUAL SITE MODEL AND IDENTIFICATION OF CLEAN-UP CRITERIA by the high red ox potential of 470 m V. The reason for this relatively lower pH value may be due to the oxidation of iron sulfide in the organic-rich clay. The oxidation of this clay beneath the fill produces a very strong hydrogen sulfide odor (as observed during drilling activities at the site) typical of the oxidation of fine-grained iron sulfide. In addition to the hydrogen sulfide, this oxidation forms an iron oxyhydroxide precipitate and sulfuric acid.

The iron oxyhydroxide precipitate forms a fresh adsorption site for arsenic and lead. The sulfuric acid is usually neutralized by the dissolution of clays and other minerals in the irrunediate vicinity of the oxidizing sulfide, becoming dissolved sulfate ion.

MILDLY OXIDIZING TO MILDLY REDUCING CONDITIONS
Mildly oxidizing to mildly reducing conditions (+100 to -100 mV) could be present irrunediately above or below the black, iron sulfide-rich and organic-rich clay encountered beneath the fill layer. Under mildly reducing conditions and low pH, iron oxyhydroxide can have a higher degree of dissolution. Dissolution of the iron oxyhydroxide may in turn disassociate the adsorbed lead and arsenic. However, in the oxidizing environment of the unsaturated zone that contains the elevated arsenic and lead at the site, the iron will reprecipitate within a very small transport distance, forming a fresh adsorption site for both arsenic and lead. There is sufficient iron and organic matter in both the fill and the clay that both lead and arsenic adsorption should be complete and irreversible within a very short transport distance (less than a few feet) into the surrounding oxidizing conditions. This is particularly true with the minimal water infiltration observed in the vadose zone.

REDUCING CONDITIONS
Reducing conditions (zero to negative mV redox potential) likely exist within the black, organic-rich and iron sulfide rich clay. Arsenic, if present, will be in its trivalent, reduced form (As III) and probably exists as an arsenic sulfide, since arsenic has a very high affinity for sulfide. Arsenic sulfides are low-solubility, stable solids. Under reducing conditions, pH rises and sufficient carbonate (particularly in this organic-rich clay) is available for the precipitation of lead carbonate (cerrusite) to limit lead concentrations to less than 10 micrograms per liter. Thus, any movement of either arsenic or lead from the fill into the clay should result in arsenic precipitation as a sulfide (Schaufelberger, 1994, and Wok and Wai, 1994) and lead precipitation as lead carbonate, effectively irrunobilizing both arsenic and lead.

POTENTIAL IMPACT TO GROUNDWATER
In the unlikely case that there was a significant amount of water infiltrating through the asphalt pavement at the site, and the clay underlying the fill material contained numerous fractures, it may be possible for arsenic and lead to be transported downward through the fractures to the shallow water table aquifer. The clay adjacent to any fracture would rapidly become oxidized, releasing both carbon dioxide and most likely iron, sulfate, and arsenic, but little lead, since the lead would be precipitated as a lead carbonate. In the oxidized conditions of the unsaturated and saturated zones, the iron would precipitate as iron oxyhydroxide, forming an adsorbing media for the arsenic. Because the alluvial aquifer beneath the site contains an abundance iron oxyhydroxides, any arsenic and lead that are able to reach the top of the aquifer would be readily adsorbed, and would not be transported beyond the site boundary.

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SECTION 4 CONCEPTUAL SITE MODEL AND IDENTIFICATION OF CLEAN-UP CRITERIA

4.1.4 Conclusion
The vertical distribution of arsenic and lead in soil, the analytical results from numerous grab groundwater samples, and the geochemical conditions encountered in soil beneath the site support the following conclusions:
• elevated levels of arsenic and lead are present in the shallow fill material, and are not present in the underlying deeper, native soil;
• groundwater is not impacted by arsenic or lead;
• arsenic and lead at the Cal Spray site are essentially immobile under the geochemical conditions encountered in the soil beneath the site. Furthermore, any future migration potential of arsenic and lead will be extremely limited due to the continued presence of an asphalt cap covering the site reducing infiltration.

SFO/SECT4.DOCl981320008 4-6

SECTION 5
Feasibility Study
This section describes the development and evaluation of remedial alternatives to manage the elevated concentrations of arsenic and lead found in soil at the Cal Spray site. The development and evaluation process includes: 1) establishing remedial action objectives and goals; 2) identifying remedial action alternatives; 3) evaluating remedial action alternatives; and 4) recommending an alternative for implementation. Each of these steps is discussed in the following subsections.

This Feasibility Study (FS) is based upon data collected during the site investigations conducted to date (as described in Sections 2 and 3) and the conceptual site model described in Section 4.

5.1 Remedial Action Objectives and Goals
The remedial objectives of the Cal Spray RI/FS are management of soil containing arsenic and lead at concentrations exceeding designated cleanup criteria. The remedial goals are to minimize future direct exposure to elevated levels of arsenic and lead found in site soil.

DTSC will consider the use of current EPA Region IX, May 1, 1998 Preliminary Remediation Goals (PRGs) to determine the cleanup levels in soil on a site-specific basis. These values reflect the most current EPA toxicological and risk assessment information for the most common exposure pathways (ingestion, dermal contact, and inhalation) applicable to this site. The appropriateness of using the PRGs as remediation goals is determined by DTSC on a site-specific basis.

The arsenic PRG is 0.38 mg/kg for residential soil, and 3.0 mg/kg for industrial soil. The PRGs are based on site-wide average concentrations. Because the site background concentration of arsenic in soil is higher than the PRGs, a more appropriate clean up goal for arsenic is the local background concentration of 18 mg/kg, as determined in Section

3.3.9. The lead PRC is 400 mg/kg for residential soil, and 1000 mg/kg for industrial soil. DTSC has indicated that an appropriate residential lead cleanup level is a site-wide lead average of 400 mg/kg, with no point to exceed 840 mg/kg (as discussed in the April 21, 1998 meeting at DTSC offices in Berkeley, California).

Thus, the soil cleanup criteria for the Cal Spray site are as follows:
• Arsenic concentrations found to exceed 18 mg/kg during remediation, as determined by side-wall and bottom confirmation sampling, shall be remediated and handled in accordance to methods outlined in this report.
• Lead concentrations above a site-wide average of 400 mg/kg, with no single point to exceed 840 mg/kg.

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5.2 Identification of Soil Remedial Action Alternatives This section identifies various remedial technologies and remedial action alternatives for the Cal Spray site. Applicable remedial technologies selected for the site include institutional controls, excavation and consolidation or offsite disposal, containment via capping, and stabilization. These technologies are described in detail below. Groundwater remedial actions are not addressed in this feasibility study because the groundwater at the site is not impacted by previous site activities.

5.2.1 Technologies
Institutional Controls. The implementation of institutional controls serves to reduce the potential for future possible exposure by restricting site access and limiting future land use.

These controls will be required for those alternatives that do not completely remediate the site to meet cleanup criteria. Institutional controls may include access controls, a deed restriction and/ or a deed notice, or asphalt or concrete pavement.

The installation of clean utility corridors are required for all alternatives that do not completely remediate the site to meet cleanup criteria.

Excavation, consolidation, and disposal. Soil excavation involves physically removing soil containing elevated levels of arsenic and lead. The size and type of equipment and construction techniques selected to remove the soil are determined by the physical characteristics of the materials being excavated, the depth of the excavation, the location of excavations with respect to permanent structures, and the usable space for stockpiling excavated soil. After excavation, the soil is consolidated onsite, or treated and/ or disposed of offsite, or a combination of the two. Confirmation samples will be collected from the bottom and side-walls of all excavations. Arsenic concentrations exceeding 18 mg/kg during remediation shall be removed.

Due to site size limitations and the relatively small volume of soil being considered for remediation, consolidation of soil and offsite disposal are the preferred technologies for final management of the soil. Soil excavated from one area of the site may be consolidated onto other areas of the site that will be capped.

Excavated soil slated for offsite disposal is usually stockpiled, then sampled to determine waste classification; however, in situ waste characterization may also be possible. Results of waste characterization sampling determines where excavated soil will be disposed. Soil can be classified as either non-hazardous, California-only hazardous, or RCRA hazardous. Soil characterized as non-hazardous will be disposed of in an offsite California Class II landfill.

Soil characterized as California-only hazardous or RCRA hazardous will be disposed of in an offsite California Class I (RCRA Subtitle C) landfill. As required by federal regulations, all RCRA hazardous soil will be pre-treated by stabilization at the Class I landfill facility prior to placement within the landfill.

Containment. A single barrier asphalt cap will reduce rainfall infiltration and prevent direct exposure to the shallow soil. Cap maintenance consists of an annual inspection and report, and occasional repair of cracks. The asphalt cap is engineered to withstand heavy truck traffic and can be designed to overlay the existing asphalt pavement at the site.

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SECTION 5 FEASIBILITY STUDY
Stabilization. The soil stabilization process involves mixing the soil with reagents to chemically maintain the COPCs in their most immobile or least toxic form. The goal in stabilization is to reduce the solubility or chemical reactivity of the waste. Both in situ and ex situ stabilization are presented as alternatives. Stabilization is not a preferred remedial technology for this site, because all impacted soil remains onsite, and stabilization is costly.

This technology is included in the feasibility study for comparison purposes.

5.2.2 Remedial Action Alternatives
Area 1
Potential remedial action alternatives are summarized below and presented on Table 10. A detailed description of each alternative, including the areas and volume of soil removed, is presented in Appendix G. The alternatives for Area 1 are as follows:
• Alternative 1, "No further action," is the baseline case. No remedial actions are proposed for this alternative. This alternative will require a deed restriction and the installation of clean utility corridors.
• Alternative 2 consists of construction of an engineered asphalt cap over the entire site, except north and southeast of the tire store where soil data indicate these areas were not impacted by Cal Spray residues. This alternative will require a deed restriction, the installation of clean utility corridors, and operation and maintenance (O&M) of the asphalt cap.
• Alternative 3 consists of excavation of hot spot areas (areas with highly elevated concentrations of arsenic and lead), and construction of an engineered asphalt cap over the entire site, except north and southeast of the tire store. This alternative will require a deed restriction, the installation of clean utility corridors, and operation and maintenance (O&M) of the asphalt cap.
• Alternative 4 consists of excavation of hot spot areas, and the top two feet of soil where shallow soil data (0 to 2 feet bgs) indicates arsenic and lead levels in soil exceed the clean up criteria. The entire site will be covered with an asphalt cap, except north and southeast of the tire store. This alternative will require a deed restriction and operation, the installation of clean utility corridors, and maintenance (O&M) of the asphalt cap. • Alternative 5 is similar to Alternative 4, except it does not include excavation of hot spot areas. Instead, only the top 2 feet of soil will be excavated from areas containing arsenic and lead at levels exceeding clean-up criteria. The entire site will be covered with an asphalt cap, except north and southeast of the tire store. This alternative will require a deed restriction, the installation of clean utility corridors, and operation and maintenance (O&M) of the asphalt cap.
• Alternative 6 excavates all soil containing arsenic and lead at levels exceeding clean-up criteria. The site will be backfilled and repaved with asphalt to restore the site to its original condition.
• Alternative 7 includes in-situ stabilization of all soil containing arsenic and lead at levels exceeding clean-up criteria. The entire site will be covered with an asphalt cap following SFOISECT5 rilsx.docl981530007 5-3

SECTION 5 FEASIBILITY STUDY
stabilization, except north and southeast of the tire store. This alternative will require a deed restriction, the installation of clean utility corridors, and operation and maintenance (O&M) of the asphalt cap.
• Altemative 8 includes ex-situ stabilization of all soil containing arsenic and lead at levels exceeding clean-up criteria. The entire site will be covered with an asphalt cap, except north and southeast of the tire store. This alternative will require a deed restriction, the installation of clean utility corridors, and operation and maintenance (O&M) of the asphalt cap.

Hot spot definition.

Areas designated as "hot-spots" are those areas that contain arsenic and/ or lead at highly elevated concentrations. The hot spots are defined by area and depth, and are based on the results of the RI soil sampling results. Area 1 was divided into polygons using the Theissen Method, which is an un-biased method of dividing the site by connecting the perpendicular bisectors.of imaginary lines drawn between each soil boring. One boring is located within each polygon, and the concentration of each soil sample from that boring is assumed to be the same value for that depth over the entire polygon. Figures within Appendix G associated with each alternative define the hot spot areas for Alternatives 3 and 4.

Areas 2, 3, and 4.

The remedial alternatives for Areas 2, 3 and 4 will entail excavation and offsite disposal of all material exceeding the cleanup criteria, then restoration of each of the properties to their original conditions. The areas of excavation for these properties are shown in detail in Appendix G. The estimated site-wide average concentrations of arsenic and lead (based on the 95th UCL) remaining in soil on these properties after remediation are below the cleanup criteria, and are presented in the 'Basis for Costing' sheets, also included in Appendix G.

Other remedial alternatives for these areas were not considered for the following reasons:
• The volume of material exceeding cleanup criteria on Area 3 is limited. Complete removal of this material would be expeditious, easily implemented and would avoid the requirement of a deed restriction on this property.
• The properties comprising Areas 2 and 4 are zoned residential; therefore complete cleanup to residential standards is required by DTSC.

Implementation of the remedial action for Area 2 will be difficult because the existing building on the site will have to be moved, or demolished and rebuilt, since impacted material is likely beneath the building. Area 2 may be re-zoned from residential to commercial use. The clean-up requirements for this parcel would then change from residential standards to industrial standards. If Area 2 is re-zoned to commercial, then the recommended alternative for this property is to leave impacted material onsite, cover the site with an asphalt or concrete cap, and institute a deed restriction. This option would also allow the building to remain intact, and would allow some of the soil excavated from Area 3 and/ or Area 4 to be consolidated onto Area 2.

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5.3 Evaluation of Remedial Action Alternatives
Potential remedial alternatives for Area 1 were formulated using the technologies discussed in the previous section. These alternatives were evaluated based on their effectiveness, implementability, cost. The result of this evaluation is discussed herein. The ability for each alternative to comply with Applicable or Relevant and Appropriate Regulations (ARARs) is presented in Appendix F to this report.

5.3.1 Effectiveness
Effectiveness is a measure of how well an alternative protects human health and the environment. Each alternative is evaluated as to its effectiveness in reducing toxicity, mobility, or volume of wastes. Both short- and long-term components of effectiveness are evaluated. 'Short term' refers to the period of time during implementation of the remedial action, and 'long-term' refers to the period after remediation is complete. The effectiveness of the different alternatives for Area 1 is discussed below.

Alternatives 6 and 8 would have the highest relative short-term risk associated with construction and implementation of the remedial action, because the excavation volume is greatest (thus a greater potential exists for worker exposure to site soil). However, Alternatives 3, 4, and 5 all involve soil excavation; therefore, the potential for worker exposure is also present with these alternatives. Alternatives 1, 2, and 7 would have no significant short-term risk since no soil is excavated.

The long-term effectiveness with respect to protection of human health is equal for all of the alternatives (except Alternative 1). Alternatives 2 through 8, excluding Alternative 6, would provide an asphalt cap; thus, an exposure pathway would not exist. In order to have a risk, an exposure pathway must be present. Therefore, the long-term human health risks for all of the alternatives (except Alternative 1) are negligible.

Implementation of any of the alternatives (except Alternative 1), reduces the sitewide human health risks to an acceptable level for carcinogens (of 10-4 to 10-6), and to an acceptable level for non-carcinogens (hazard index at 1.0). For arsenic, risks will be based on the background concentration level. Risk reduction for Alternative 6 is achieved by removing all soil above background concentrations (removal of all soil in exceedence of the arsenic cleanup criteria also removes all elevated levels of lead). Risk reduction for all other alternatives (except Alternative 1) is achieved due to the incomplete exposure pathway to impacted soil due an asphalt cap covering all of the impacted soil at the site. A cap will also greatly reduce the amount of infiltration of precipitation into the site soils, thus further inhibiting the migration potential of arsenic and lead remaining in the soil.

In the event of disturbance of the cap (e.g., unforeseen construction at the site), an exposure pathway may be created. In this case, Alternatives 4, 5, and 6 are the most effective at preventing exposure to impacted soil since the top two feet of soil across the site containing arsenic and lead at levels exceeding cleanup criteria will be removed. The resulting risks for these alternatives will be lower than for the other alternatives, assuming the breach does not exceed a depth of 2 feet bgs.

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Alternatives 1and2 have the least long-term effectiveness since most of the impacted material remains onsite. Alternative 1 is the least effective, since it does not improve the existing asphalt pavement at the site. Alternatives 7 and 8 are effective at reducing the mobility and toxicity of the arsenic and lead, and eliminating the exposure pathway; however, the volume of impacted soil is not reduced or removed from the site. Alternatives 3, 4, and 5 are equal at eliminating the exposure pathway; however, Alternatives 4 and 5 are more effective at reducing the potential for future exposure should the asphalt be disturbed.

Alternative 6 is most effective in reducing the volume of hazardous material at the site.

5.3.2 Implementability
Implementability addresses the technical and administrative feasibility of implementing each of the alternatives. Technical feasibility includes ease of construction and operation and maintenance considerations. Administrative feasibility includes activities requiring coordination with other offices and agencies, such as obtaining permits. The performance of each alternative with respect to implementability is discussed below.

Alternatives 1 (no further action) and 2 (construction of an asphalt cap) would be the easiest to implement because they do not require soil excavation. Alternatives 3 through 6 and Alternative 8 would all require soil excavation. Alternative 3 would be the easiest of the excavation scenarios to implement because of the small volume of soil removed.

Alternatives 6 and 8 would be the most difficult to implement due to the large volumes of soil requiring excavation. The limited usable space at the site would hinder construction production rates for Alternatives 4 through 6 and Alternative 8 because of the limited space to stockpile soil after excavation. Alternatives 7 and 8 would also be difficult to implement due to the amount of space required for the necessary construction equipment. The stabilization process also has inherent technical difficulties of adequately and thoroughly mixing of the stabilization agents in the soil.

DTSC will require operation and maintenance (O&M) activities of the asphalt cap for all of the alternatives except Alternative 6. This will require an annual inspection of the cap, an annual report, and any repairs if needed.

Administrative activities will include coordination with DTSC and the City of Watsonville.

DTSC will require a deed restriction for all alternatives except Alternative 6 because arsenic and lead will remain in the soil at concentrations above the cleanup criteria for all other alternatives. Traffic permits may also be required for the alternatives requiring offsite disposal of impacted soil because of the large number of trucks entering and exiting the site from Riverside Drive. Remediation activities and excessive truck traffic may also temporarily hinder the tire store operations and the pallet manufacturing operations.

5.3.3 Costs
Cost estimates for the remedial action alternatives were prepared using the available data from the RI, and are for remediation activities only. They do not include costs incurred due to the disruption of facility operations such as work stoppage or work inefficiencies of current or future tenants residing on Areas 1 and 3 during the period of remediation activities. Costs are included for the relocation of existing utilities and the installation of a clean utility corridor as well as for the operation and maintenance (O&M) of the asphalt cap SFO/SECT5 ritsx.doc/981530007

SECTION 5 FEASIBILITY STUDY
(except Alternative 6 which does not include costs for the installation of a clean utility corridor or O&M). O&M costs are projected for 30 years and are based on 30-year Net Present Value (NPV) dollars. Costs are presented on Figure 16 and Table 11. The detailed cost estimates for each alternative are presented in Appendix G.

The cost of Alternative 1 (no further action) are $224,000. This is the cost associated with the installation of utility corridors and the relocation of existing utilities. The cost for installation of the cap (Alternative 2) is $487,000. The costs for Alternatives 3 and 4 are $1,415,000 and $1,872,000, respectively. Cost for Alternative 5 is similar to Alternative 3 at $1,376,000. Alternative 6 is the most costly of the alternatives at $3,375,000. In situ stabilization, Alternative 7, is less costly ($1,832,000) than ex situ stabilization, Alternative 8 ($2,206,000).

Costs related to the volume of soil requiring excavation and waste classification profiling, (i.e., the percentages of non-hazardous, California-hazardous, and RCRA-hazardous soil), are based on the available analytical data to date. Additional soil sampling prior to and during remediation activities will determine the actual volume of non-hazardous, California-hazardous, and RCRA-hazardous soil to be managed.

Areas 2, 3, and 4.

Estimated costs for complete soil removal actions for Area 2, Area 3, and Area 4, are $188,000, $45,000, and $96,000, respectively. If Area 2 becomes re-zoned, then some soil from Area 4 will be consolidated onto Area 2, and Area 2 will then be capped. The estimated costs for this scenario are $62,000, $45,000, $34,000, for Area 2, Area 3, and Area 4, respectively.

5.4 Recommendation of Remedial Action
Table 11 summarizes the evaluation of the remedial action alternatives for Area 1 based on their effectiveness, implementability, and costs.

Chevron recommends implementing Alternative 2, (construction of an asphalt cap) as the preferred remedial action. The short-term risk due to remediation activities for this alternative is the lowest of all alternatives, and it provides the same degree of long-term protection of human health as the other alternatives (except Alternative 1). Paving over the existing asphalt prevents direct exposure to impacted soil both now and in the future, and minimizes precipitation infiltration. This alternative is the easiest to implement, the least costly, and provides the greatest benefit-to-cost ratio. Since soil containing arsenic and lead at concentrations above cleanup criteria remains onsite, ongoing O&M of the asphalt cap is required. However, O&M is also required for all other alternatives except Alternative 6.

The evaluation of the other alternatives is summarized below. • Alternative 1 is not effective at reducing the potential for current or future exposure to soil at the site, and is therefore not a feasible alternative. • Alternative 3 reduces a significant amount of arsenic- and lead-impacted soil at the site by removing hot spot areas, and the asphalt cap is effective at eliminating the exposure pathway. This alternative is harder to implement and more costly than Alternative 2; SFO/SECTS rifsx.doc/981530007

SECTION 5 FEASIBILITY STUDY
and the risk of future exposure to impacted soil due to disturbance of the cap is only reduced slightly. Since soil containing arsenic and lead at concentrations above cleanup criteria remains onsite following the removal action, ongoing O&M of the asphalt cap is still required.
• Alternative 4 reduces a significant volume of arsenic- and lead-impacted soil at the site by removing hot spot areas; it reduces the potential risk of a future exposure to impacted soil by an intentional or accidental breach of the asphalt; and is effective at eliminating the exposure pathway. This alternative is more difficult to implement and more costly than Alternative 2, but it achieves the same degree of risk reduction as Alternative 2. Furthermore, the large volume of soil requiring excavation, stockpiling, and transportation significantly increases the risk of exposing workers and neighbors at or around the site to impacted soil. Since soil containing arsenic and lead at concentrations above cleanup criteria remains onsite following the removal action, ongoing O&M of the asphalt cap is still required.
• Alternative 5 reduces the potential risk of a future exposure to impacted soil by an intentional or accidental breach of the asphalt. This alternative is more difficult to implement and more costly than Alternative 2, but it achieves the same degree of risk reduction as Alternative 2. Since soil containing arsenic and lead at concentrations above cleanup criteria remains onsite following the removal action, ongoing O&M of the asphalt cap is still required.
• Alternative 6 effectively eliminates all future risk associated with the site by removing all material above cleanup criteria. This alternative is by far the most difficult to implement and carries the highest short-term risk to exposure to excavated impacted soil. The amount of truck traffic generated during construction will hinder local traffic and greatly affect the existing business at the site. Furthermore, the cost is approximately 7 to 8 times higher that of Alternative 2. Because all impacted material is removed, O&M of an asphalt cap is not required.
• Alternatives 7 and 8 were not selected because they are difficult to implement, they do not reduce the volume of impacted soil, and they are costly. Alternative 8 has a high short-term risk because of the large volume of soil requiring excavation, stockpiling, and mixing, thus increasing the risk of offsite migration of impacted soil. The risk of offsite exposure to wind-blown dust is the greatest with this Alternative 8. Since soil containing arsenic and lead at concentrations above cleanup criteria remains onsite following stabilization, ongoing O&M of the asphalt cap is still required.

For Area 3 and Area 4, Chevron recommends excavation and offsite disposal and/ or consolidation of all material exceeding the cleanup criteria, then restoration of each of the properties to their original conditions. This action will ensure the most expeditious and effective cleanup for these two properties.

The recommended alternative for Area 2 will depend upon the final zoning designation of the property. Two alternatives are proposed for this property:

1. If the property remains zoned as residential, then the alternative for this property is excavation and offsite disposal of all material exceeding the cleanup criteria, then restoration of the property to its original condition.

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2. If the property is re-zoned as industrial, then the recommended alternative for this property is cover the site with an asphalt cap, and institute a deed restriction. Some of the soil excavated from Area 3 and/ or Area 4 may be consolidated onto Area 2.

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SECTION6
References
Adriano, D.C., 1986, Trace Elements in the Terrestrial Environment: Springer-Verlag, New York, pp. 46-72, 219-262.

Applied Science and Engineering, Inc. 1996. Results of Soil Sampling, 135 Walker Street, Watsonville, California. July.

Bradford, G.R., A.C. Chang, A.L. Page, D. Bakhtar, J.A. Frampton, and H. Wright. 1996.

Background Concentrations of Trace and Major Elements in California Soils. Kearny Foundation Special Report, UC Davis. March.

CH2M HILL. 1997a. Work Plan for the Supplemental Investigation of the Cal Spray Site and Adjoining Properties, Chevron Chemical Company. October.

CH2M HILL. 1997b. Personal communication with Paul Crosser, Bandag Company. May.

DTSC. 1994. Public Participation Policy and Procedures Manual. July.

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Lewis, Betty. 1976. California Spray Company No. 30. Document prepared for KOMY.

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Maiorana, Michael. 1996. Chain of Title Deed Chart, Made for CH2M HILL, ChevChemWa tonsville. August.

SECT6 RIFS.DOC 6·1

Mok, W.M. and Wai, C.M., 1994, Mobilization of Arsenic in Contaminated River Water, in Arsenic in the Environment, Part 1: Cycling and Characterization, edited by J.O. Nriagu, John Wiley & Sons Inc., New York, pp. 99-117.

Prasad, G., 1994, Removal of Arsenic(V) from Aqueous Systems by Adsorption onto some Geological Materials, in Arsenic in the Environment, Part 1: Cycling and Characterization, Edited by J.O., Nriagu, John Wiley & Sons Inc., New York, pp. 133-154.

Schaufelberger, P.A., 1994, Arsenic Minerals Formed At Low Temperatures: in Arsenic in the Environment, Part 1: Cycling and Characterization, edited by J.0. Nriagu, John Wiley & Sons, Inc., New York, pp. 403-415.

United States Environmental Protection Agency. 1986. RCRA Groundwater Monitoring Technical Enforcement Guidance Document, OSWER, 0058
United States Environmental Protection Agency. 1988. Guidance for Conducting Remedial Investigations and Feasibility Studies under CERCLA. October.

United States Environmental Protection Agency. 1997. Engineering Bulletin: Technology Alternatives for the Remediation of Soils Contaminated with As, Cd; Cr, Hg, and Pb.

August.

United States Environmental Protection Agency. 1998. Preliminary Remediation Goals.

May.

United States Geological Survey. 1972. Geology and Groundwater of the Pajaro Valley Area - Santa Cruz and Monterey Counties, California. June.

Weast, R.C., 1973, Handbook of Chemistry and Physics: CRC Press, Cleveland, Ohio.

SECT6 RIFS.DOC 6-2

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Tables

Table 1
Summary of ASE Soil Sampling Results
Cal Spray Site, Watsonville, California
Concentration (mWk~)
Pesticides
Soil Sample Sample* Calcium Sulfur TRPH /PCBs Arsenic Copper Strychnim SVOCs Type Number Depth (ft bgs) (EPA 7140) (EPA 6010 (EPA 418.1' (EPA 8080) (EPA 7060) {EPA 7210 (HPLC) (EPA 8270) Orange, platy mater 10458 0-2 8900 24000 -- -- -- -- <2.5 -- - -- --- White material 10460 0-2 68000 59000 -- -- -- -- <2.5 -- - - - -- - -·- Oily sand 10461 4 -- -- 2700 ND -- -- -- -- - -
Native clay 10459 10-11 -- -- ND -- -- -- -- --
Soil w/ crystals 10462 4 -- -- 4000 ND -- -- <2.5 -- ~ - Composite 10458/10460/ 410 (11 mg/L -- -- -- -- -- 9 -- -- 10461/10462 in STLC test) Composite 10461/10462 -- -- -- -- -- -- -- -- ND
Notes:
-- Sample not analyzed
• Depths approximated from ASE report
Source: Applied Science & Engineering (ASE) Report, July 3, 1996 12/2/99 Table 1rrables.xls

Table 2
Summary of Soil Analytical Data - Area 1
(September, October, November, 1996 and December 1997)
Cal Spray Site, Watsonville, California
Concentration (mg/kg)
Sample Sample Arsenic Lead TRPH Mercury Strychnine
ID Depth (ft bgs) (SW 7060) (SW 7421) (EPA 8015) (SW 7471) (HPLC) September 1996 Investigation
CH1 0.5 - 1 1.6 2.1 - 0.17 - 1.5 - 2 471 849 - 0.27 <1
2-3 1300 1560 - 1.8 - CH2 0.5 - 1 95.8 79.7 - 0.12 - 1.5 - 2 15.4 24.4 - 0.07 <1 -

2.5 - 3 34.8 37.5 <33 0.06 - CH3 0.5 - 1 10.5 17 - <0.03 - 1 - 1.5 7020 985 - 0.98 <1 -- 2 - 2.5 1480 9.8 - 0.05 - CH4 0 - 1 81.1 369 - 0.07 - 1 - 1.5 3.8 197 - 0.18 <1 --- 2 - 2.5 5.3 8.3 - 0.1 - CHS 9 - 10 22.9 6.6 <32 - - i------- 15 - 16 9.2 13.5 <34 0.19 - ~· ----------
17 - 18 12.1 13.8 <36 0.18 <1
CH6 15.5 - 16 8.5 12.5 <35 0.07 - - ---~--

17.5 - 18 11.6 11.9 <36 0.19 <1
~·---
CH7 14 - 15 20.6 13.5 <34 - - ~------- ---- ------------ --·--- ---- 16 - 17 19.3 16.1 <39 0.18 - ----------~-- --- ~-- ------- --- ----- 17 - 18 29.3 14.9 <40 0.22 <1
October 1996 lnvesticiation
,____
CHS _____ 0.5 - 1 2.72 6.71 - - - --- ----- - --------- --------- -----------

2.5 - 3 8.94 10.3 - - - f-----~---- --- --- ---- - - ----------- --- --·-- ---- - --

5.5 - 6 10.9 11.8 - - - CH9 0.5 - 1 3.6 5.18 - - - ------- ~----·- ------------ - - - -- -- - ------

1.5 - 2 31.7 10.6 - - - - ---·--- ----- ._ ____ ------~--- - --- - - - ---· - -· -----~-~

5.5 - 6 9.14 8.51 - - - CH10 0.5 - 1 2830 2570 - - - -- -- -- ----~- --- ----- ------ 1.5 - 2 101 8940 - - - - - - - ----· -----

5.5 - 6 299 363 - - -
November 1996 Supplemental Remedial Investigation
CH11 2 - 2.5 119 239 - - - - ·- -------~ -----
4 - 4.5 1010 13.2 - - - -- --- --- ~------- -------- 6 - 6.5 <11.5 NA - - - CH12 2 - 2.5 19400 4660 - - - --- ---------- -------- ----- 4 - 4.5 21400 1550 - - - -- - --- - - --- 6 - 6.5 3670 156 - - - -- ·- --- --- --------- -·--
8 - 8.5 818 <13.9 - - - CH13 2 - 2.5 32.1 5.13 - - - - -·--------- 4 - 4.5 2730 3920 - - - - - ------- 6 - 6.5 966 20.6 - - - -- ___ ,,_
CH13(DTSC
Split Sample) 9.5 -10 <5 6.55 - - - Notes:
"--"Sample not analyzed
12/2/99 Page 608 of 1256 Page 1 of 3 Tables.xis
Table 2
Summary of Soil Analytical Data - Area 1
(September, October, November, 1996 and December 1997)
Cal Spray Site, Watsonville, California
Concentration (mg/kg)
Sample Sample Arsenic Lead TRPH Mercury Strychnine
ID Depth (ft bgs) (SW 7060) (SW 7421) (EPA 8015) (SW 7471) (HPLC) CH14 2 - 2.5 85.5 2010 - - - 4- 4.5 209 102 - - - CH15 2 - 2.5 3.6 4 - - - 4- 4.5 16 17.3 - - - CH16 2 - 2.5 755 105 - - - 4- 4.5 33.6 84.5 - - - CH17 2 - 2.5 275 11300 - - - 4 - 4.5 458 96.8 - - - 6 - 6.5 1650 NA - - - CH18 2 - 2.5 88.6 316 - - - 4- 4.5 1300 9.86 - - - 6 - 6.5 <12.5 NA - - - CH19 2 - 2.5 6.25 4.05 - - - ------ 4- 4.5 543 864 - - - --- 6 - 6.5 252 136 - - - 8 - 8.5 NA NA 715 - - CH20 2 - 2.5 9.9 16.9 - - - 4- 4.5 9.31 17.9 - - - 8 - 8.5 --NA- NA 3440 - - December 1997 Suoolemental Remedial lnvestii:iation
CH21 9.5-10.0 136 7.86 - - - ------- ~·

14.5 - 15.0 12.5 13.1 - - - CH22 9.5 - 10.0 0.86 7.49 - - - -- 1---- -------------

14.5 - 15.0 7.56 4.77 - - - CH231 0.5 - 1.0 2.95 5.5 - - - ------------------ - ------ - -- -- -------------- - --------

4.5 - 5.0 429 54.0 - - - --------·--------------- - - . - - - -- -- -·----------- -------- ----- 9.5 - 10.0 7.90 7.1 <13 - - 1----------- _____ ., -.------ - - -- -· -- ---------- --~ 1------- ·----------- -- -------------

14.5 - 15.0 -- 53.3 -----

11.6 <13 - - -·---------t----~---- ---~------

19.5-20.0 16.5 - - - - CH24 0.0. 0.5 <9.0 25.2 <100 - - ----- ---·----- -- ----· ------- --- --:::-11() ___ -----·--- 4.5 - 5.0 <9.0 47.9 - . ---- ----- ---- --- --------- .. -- - - ------~--- -------

9.5. 10.0 <9.0 <10.0 <140 - . ----- -- --·- - - -- ----- -~------- -- ---------

14.5. 15.0 22.8 <10.0 <140 . - CH25 9.5. 10.0 37.9 8.9 - . - ---·--- -- - --- -- ---- --·---------- -- -- - ----- CH-DUP-1 9.5. 10.0 42.4 8.3 . - . ~----- ------·- ---- -------~--- ------ -~----

14.5-15.0 15.7 11.1 . - .

CH26 0.0. 0.5 204 600 . . ND - -- --- -- --- ~--·---- - ------~-

4.5. 5.0 33.0 106 - - - - ---·-- -- - ---- -- ·-- ----~--

14.5. 15.0 12.1 13.6 - . - ----- - ·-- - -- - -- -·----- ------ CH26(0TSC
Split Sample) 14.5. 15.0 . . - - ND
CH27 9.5. 10.0 15.4 8.29 68 . . ---- ------ - --- ---- - .. ·- ---~--- -- ------

14.5. 15.0 13.7 5.98 <13 . .

Notes:
"··"Sample not analyzed
'Samples CH23 (9.5' • 10)' and (14.5' - 15.0") were also analyzed for VOes (EPA 8010). No VOes were detected. 12/2/99 Page 609 of 1256 Page 2 of 3 Tables.xis
Table 2
Summary of Soil Analytical Data - Area 1
(September, October, November, 1996 and December 1997)
Cal Spray Site, Watsonville, California
Concentration (mQ/kQ)
Sample Sample Arsenic Lead TRPH Mercury Strychnine
ID Depth (ft bgs) (SW 7060) (SW 7421) (EPA 8015) (SW 7471) (HPLC) CH28 0.5 - 1.0 2.3 3.57 - - - 9.5 - 10.0 6.15 5.38 - - - 14.5-15.0 9.81 12.1 - - - CH292 0.5 - 1.0 <9.0 <10 <0.55 - - ------ 5.0 - 6.0 56 <10 <62 - - 9.5 - 10.0 <9 <10 <12 - - CH302 0.5 - 1.0 3.0 4.95 - - - 5 -5.5 6500 1850 - - - 9.5 - 10.0 9.1 9.6 - - - CH-DUP-5 9.5 - 10.0 <9.0 <10.0 <11 - - 12.5 - 13.5 <9 <10 - - - December 1997 Succlemental Remedial Investigation (Locust Street Samcles CH32 0.5-1.0 8.2 27.4 - - - 4.5 - 5.0 8.8 10.6 - - - CH-DUP-9 4.5 - 5.0 10.2 15.2 - - - ··-1--

9.5 - 10.0 5.9 8.5 - - - 14.5-15.0 16.8 15.0 - - - CH33 0.5 - 1.0 8.0 22.2 - - - 4.5 - 5.0 9.4 12.7 - - - ---

9.5 - 10.0 20.5 8.4 - - - f--------------

14.5 - 15.0 11.5 6.2 - - - December 1997 Supplemental Remedial Investigation (Riverside Drive Samples) CH34 0.5 - 1.0 59.0 720 - - - ------- 5.5 - 6 34.1 15.0 - - - CH-DUP-8 5.5 - 6 20.7 31.1 - - - -------

10.5 - 11 6.9 6.3 - - - --------- --- --- ----

13.5-14 11.6 8.4 - - - CH35 0.5 - 1.0 22.4 106 - - - ------ - -- ------------

4.5 - 5.0 11.6 9.97 - - - --- ----- --- -·-- --- - ---------- ----------------- -- - -----------·-----

9.5 - 10.0 8.17 7.61 - - - -- - ---· - --- ---~------ -- ----- ----···---------·- -- - - .. - --------------·- i-------------

14.5 - 15.0 12.4 13.5 - - - CH36 0.5 - 1.0 11.0 18.6 - - - --- ·----- - -- -- -- - -- -- ------ ------

5.5 -- --
- 6 8.8 10.3 - - - ------- -- - --- --- ----- - --- --- - --·--- ----- 9.5 - 10.0 6.7 8.5 - - - -- ------ -- --- -- -----~------ ------- --- - - --- -- -- - --r---------f-------- -----~

14.5-15.0 13.0 14.0 - - - - -- ------ -- ·----- - - - - - - - -· --- --------->------·

19.5-20 10.3 11.9 - - - November 1998 Samplin~ Event - Cambria Environmental CH37 -- 1.75 - -- - - 2.25 9.9 12 - - - ------·- - - ----------·-· --- -- -- ----- -

7.5 - 8 <5.0 5.9 - - - CH38
--------- ·- - 4.0- 4.5 180 7.2 - - - ------- -- ------- --·----- - -- ----- 10-10.5 240 <5.0 - - -
Notes:
"--·Sample not analyzed
' All samples from CH29 and CH30 were analyzed tor pesticides/PCBs (EPA 8080). None were detected. 12/2/99 Page 610 of 1256 Page 3 of 3 Tables.xis
Table 3
Analytical Results for CAM 17 Metals in Soil Samples
December 1997 Supplemental Investigation
Cal Spray Site, Watsonville, California
Sample
Sample Depth Concentration (mg/ki 1)
ID (ft bgs) As Pb Sb Ba Be Cd Cr Co Cu Hg Mo Ni Se Ag Th Vn Zn CH24 0.0 - 0.5 <9.0 25.2 <9.0 36.2 <1.0 <1.0 26.3 6.3 31.3 0.14 <3.0 20.1 <0.40 <2.0 <0.44 32.6 60.3 --
- --

4.5 - 5.0 <9.0 47.9 <9.0 82.9 <1.0 <1.0 27.0 8.2 72.4 0.08 <3.0 27.5 <0.40 <2.0 <0.44 53.2 103 --

9.5 - 10.0 <9.0 <10.0 <9.0 159 <1.0 <1.0 59.4 10.0 22.0 1.0 <3.0 72.3 <0.40 <2.0 <0.44 38.3 47.5

14.5-15.0 22.8 <10.0 <9.0 211 <1.0 <1.0 63.6 14.2 32.2 <0.08 <3.0 79.5 <0.40 <2.0 <0.44 36.7 76.1 CH29 0.5 - 1.0 <9.0 <10 <9.0 61.4 <1.0 <1.0 53.9 8.1 19 <0.08 <3.0 31.3 <0.40 <2.0 <0.44 31.5 20.6 -- - ·- --

5.0- 6.0 56 <10 <9.0 118 <1.0 <1.0 40.7 7.6 15.5 0.13 <3.0 34.0 2.47 <2.0 <0.44 33.9 47.8 -- -

9.5 - 10.0 <9 <10 <9.0 135 <1.0 <1.0 57.8 7.8 13.1 <0.08 <3.0 56.2 0.68 <2.0 <0.44 49.8 28.6 CH30 0.5 - 1.0 <4.5 <5.0 <4.5 40.5 <0.5 <0.5 39.4 8.8 5.4 <0.08 <1.5 41.3 <0.2 <1.0 <0.44 20.1 21.3 -
5-5.5 3240* 111 o· <4.5 96.2 <0.5 16.0 44.9 8.6 21.7 0.72 <1.5 52.2 0.48 <1.0 <0.44 30.4 5500 --
-

9.5 - 10.0 5.4* 7.6* <4.5 150 <0.5 <0.5 43.4 6.2 13.5 <0.08 1.8 38.6 <0.2 <1.0 <0.44 29.9 31.4 CH-DUP-5 9.5 - 10.0 <9.0 <10.0 <9.0 225 <1.0 <1.0 68.6 8.5 14.5 <0.08 <3.0 55.4 <0.40 <2.0 <0.44 49.9 38.2 -
- -
------
-
-
-·-·-
- --·- --- ----··-- -···----- --- -- --
-
-- ----

12.5 - 13.5 <9 <10 <9.0 154 <1.0 <1.0 70.7 9.0 14.2 0.08 <3.0 103 <0.4 <2.0 <0.44 49.1 37.6 Notes:
* Sample reanalyzed for suite of CAM 17 metals. Arsenic and lead concentrations differ from Table 2 results due to variability within soil samples 12/2/99 1of 1 Tables.xis

Table 4
Summary of Soil Analytical Data for Area 2
Cal Spray Site, Watsonville, California
Sample Sample Concentration (mQ/ka)
ID Depth Arsenic Lead
(ft bgs) (SW 7060) (SW742.!L:

HA1 0 - 0.5 1270 171
HA2 0 - 0.5 321 168
HA3 0. 0.5 1390 303

2.5 - 3 523 1550
HA4 0. 0.5 1330 251

2.5 - 3 129 135
M1 0.0 - 0.5 111 197 CH-[)UP~---··· 0.0 - 0.5 118 181
----- M1
i.QTSC Split Sample) 0.0 - 0.5 102 167
,_____ __ 4.5 - 5.0 9.6 16.2

9.5 - 10.0 2.59 6.87

14.5. 15.0 3.34 5.30
M2 0.0- 0.5 300 258

4.s-5.·o -- 109 12.6

9.5 - 10.0 156 12.0

14.5 - 15.0 1.92 5.52
M3 0.0 - 0.5 15 128 ·-~-·

4.5 - 5.0 7.62 8.99 -·--· ··-

9.5 - 10.0 8.45 13.2 -~-·--
·14~::-,5.0 - 1.61 7.94
M4 ________ 0.0- 0.5 190 406 .--·-- .. -- -- 4.5 - 5.0 8.67 9.28 -- ·- -- 9.5. 10.0 9.71 12.8 ---

14.5 - 15.0 1.52 7.46
MS 0.0 - 0.5 13.4 122
CH-DUP-6 ---0.0-0.5 13.4 137 --~-------- ... ~

4.5 - 5.0 10.2 10.9 ·-···- ------ -·------·
---~§.:: 10 23.6 . .Q_ 14.0
CH-DUP-7 ·~·--~--- ---·--

9.5 - 10.0 36.7 13.3 ---~-··--~-- ~-- - -------- ··---

14.5. 15.0 1.3 7.4
M6 0.0 - 0.5 13.7 111
gH-DU__:P-3 -~- .... - - - --- - ----- 0.0 - 0.5 14.9 112 --~-- --.. -~ 1--

4.5. 5.0 5.42 7.96 -----~ - 9.5 - 10.0 8.31 12.3 --~- ---- - --- . ---------- --- 14.5. 15.0 3.25 9.10 1--
M7 ·--- 0.0 - 0.5 51.0 . - .lZ? ____ - -
-. --- 1 - 1.5 ---~-

50.2 ·-- _165 --- -
2 - 2.5 5.05 29.3
MB 0.0. 0.5 49.9 118 -- ···--
1 • 1.5 135.0 536 ·- ,_ --- -------

2.5. 3 31 25.7
&f9_ 0.0. 0.5 363 304 --- ---- -----· ···-
1 . 1.5 277.0 344 ---- -- -- ----- ------ ----- --· ,.- ----

2. 2.5 212 359
M10 0.0. 0.5 1000 1320 . -- - -- - ---·- -- -~-------- --- , __ 1 . 1.5 412 1020 ---- ---~----- ------------·-- 2 - 2.5 1790 534 - ->·--- ----- ------~--- M10
(DTSC Split Sample) 1 2. 2.5 NA NA
Notes:
1 DTSC split sample for M10 was analyzed for strychnine, but was strychnine was not detected.

Footnotes are provided at the end of the table.
12/2199 Page 612 of 1256 Page 1 of 1 Tables.xis
1212/99
Table 5
Summary of Soil Analytical Data for Area 3
Cal Spray Site, Watsonville, California
Sample Sample Concentration (mg/kg)
ID Depth Arsenic Lead
(ft bgs) (SW 7060) (SW 7421)
D1 0.5 - 1.0 10 25.1

4.5 - 5.0 5.4 7

9.5 - 10.0 3.2 5.5

14.5 - 15.0 2.5 3.2

19.5 - 20.0 1.5 3 -· 24.5 - 25.0 8.7 4.2
P2 0.5 - 1.0 79.4 101 '---·

4.5 - 5.0 7.24 11.4

9.5-10.0 8.07 5.27 -- 14.5 - 15.0 2.11 3.23
P3 0.5 -1.0 19.3 41.2

4.5 - 5.0 5.2 7.9 ~·

9.5 - 10.0 4.6 5.3 - 14.5 - 15.0 3.2 3.3 -----·---19.5 - 20.0 1.2 3.5 ·-- -- 24.5 - 25.0 1.6 3.1 P4 0.5 - 1.0 50.6 80.3

4.5 - 5.0 4740 305 ·-··
CH-DUP-4 4.5 - 5.0 3460 246

9.5 - 10.0 4.42 5.3

14.5 - 15.0 3.8 4

19.5 - 20.0 2.8 3.5
PS 0.5 - 1.0 91.4 231

4.5 - 5.0 9.5 8.4 ~·-·---~-~------

9.5 - 10.0 20.9 4.9 ~·
PS
(DTSC Split Sample) 1 9.5 - 10.0 14.3 9.08
P6 0.5 -1.0 179 228 ----- .. ·- ·10.2·--~ 4.5 - 5.0 17.3

9.5 --10.0 5.2 4.0
P7 0.5 - 1.0 122 310 --- ---- ---------- ----- ---··----- -··---i--·-----

4.5 - 5.0 6.2 .!0.3 ___ ·-f-.---·--··

9.5 - 10.0 5.4 5.4
P8 0.5 - 1.0 3.0 14.2 ----- - . ----------- -·--··-------------- 4.5 - 5.0 10.4 11.7 - , __ ·-

9.5 - 10.0 4.3 5.6
pg 0.5 - 1.0 21.2 38.4 -- - ... -- __ .. ------ 4.5 - 5.0 6.1 14 --- ·- .• ······- -·---I·- -··-·-·- 9.5 -10.0 5.3 7.1 P102 0.6. 1.1 <5.0 11 -- - '-----~------- - -~- --~--·-· -~--~ -------- 4.5 - 5.0 <5.0 7.9
P11 2 2.5 - 3.0 26/223 120
P11 Dupll_cate2 --------- ------- -------·-·- 2.5 - 3.0 21 100

4.5 - 5.0 -<5.o 8.4
Notes:
1 DTSC split sample for PS was analyzed for strychnine but was not detected. 2 Samples collected by Cambria Environmental, November 1998. 3 Original sample reanalyzed for arsenic, both results presented.

Table 6
Summary of Soil Analytical Data for Area 4
Cal Spray Site, Watsonville, California
Depth (feet Arsenic Lead
Sample bgs) (mg/kg) (mg/kg)
21 0-0.5 32.0 161.0
1-1.5 18.3 9.2
22 0-0.5 18.4 294.0
1-1.5 17.4 82.2
23 0-0.5 54.4 237.0
1-1.5 49.0 108.0
24 0-0.5 141.0 382.0
1-1.5 2810.0 982.0
Z482 4.5-5 <5 6.9
ZS 0-0.5 124.0 203.0
1-1.5 286.0 327.0
Z6 0-0.5 11.3 135.0
1-1.5 157.0 752.0
Z6B2 4.5-5 <5 8.9
Z6B (Duplicate)2 4.5-5 <5 10.0
0-0.5 24.8 3020
Z7 0-0.51 21.6 307
1-1.5 20.6 199.0
Z8 0-0.5 23.7 338.0
1-1.5 18.3 123.0
z9 0-0.5 12.8 152.0
1-1.5 10.9 10.0
Z11 0-0.5 15.1 530.0
1-1.5 18.4 80.4
Z13 0-0.5 7.8 226.0
1-1.5 23.1 75.4
Samples Z1, Z2, Z3, Z4, Z6, Z9, Z11, and Z13 were analyzed on July 7, 1998 Samples ZS, 27, and Z8 were analyzed on September 21, 1998 1 - Sample Z7 (0-0.5 ft bgs) was reanalyzed on October 7, 1998 to confirm anomalous lead result. 2 - Samples 248 (5 feet bgs) and 268 (5 feet bgs) were sampled November 4, 1998 by Cambria Environmental.

Tables.xis 12/2/99

Tables.xis
Table 7
Analytical Results for Area Adjacent to Area 4 Soil Samples Cal Spray Site, Watsonville, California
Sample Sample Concentration (mg/ka)
ID Depth Arsenic Lead
(ft bgs) (SW 6010) (SW 6010)
S1 0.0 - 0.5 17.0 76.0

4.0 - 4.5 <5 <5
82 0.0 - 0.5 21.0 120.0

4.0 - 4.5 <5 <5
83 0.0 - 0.5 6.8 52.5
1-1.5 11.2 11.2
84 0.0 - 0.5 11.7 257.0
1-1.5 11.2 124.0
S5 0.0 - 0.5 14.5 97.7
1-1.5 9.6 19.5
86 0.0 - 0.5 15.5 146.0
1-1.5 5.8 6.7
S7 0.0 - 0.5 9.7 60.5
1-1.5 12.6 14.0
SB 0.0 - 0.5 11.3 112.0
1-1.5 7.0 12.4
S1 and S2 collected on 11/4/98 by Cambria Environmental and analyzed by Sequoia Analytical
S3-S8 collected by CH2M HILL on 9/20/99 and analyzed by CAS 02/16/2000

02/16/2000
Table 8
Groundwater Analytical Results
'
Supplemental Remedial Investigation
Cal Spray Site, Watsonville, California
Sample ID Concentration (µg/L)
Arsenic' Lead voes Pesticides and PCBs
(SW 7060) (SW 7421) (EPA 8010) (EPA 8080)
CH35 <2 <2 2.4 .. - CH23 2.9 462 ND - P1 <2 9.1 ND - GW-DUP-1 (Duplicate of P1) 3.2 10.5 ND - P3 <2 2.9 ND - CH28 <2 <2 ND - CH25 <2 <2 ND - CH26 <2 <2 - - CH30 <2 <2 ND ND MS <2 <2 ND - CH373 8.6 <5.0 - - CH37-Dup" 11 <5.0 - -
Notes:
1 None of the samples exceed the Arsenic MCL of 50 µg/L 2 Exceeds the Lead Action Level of 15 µg/L. Result attributed to extremely turbid sample. 3 Samples from CH37 collected from same location as CH23 by Cambria Environmental 4 Detection of 1,2-Dichloroethane, exceeds California Primary MCL of 0.5 µg/L "-"Sample not analyzed
ND= Not Detected (None of the 28 VOCs that the sample was analyzed for was detected) Tables.xis

Table 9
Analytical Results for Offsite Background Soil Samples
Cal Spray Site, Watsonville, California
Sample Sample Arsenic Lead
ID Depth (SW 6010) (SW 6010)
(ft bgs) Concentration (mQ/kal
Background #1 0.0 - 0.5 7.5 9.0

4.0 - 4.5 8 9.5
Background #2 0.0 - 0.5 11.5 110.0

4.0 - 4.5 9.2 9.7
Background #3 0.0 - 0.5 5.6 477.0
Background #4 0.0 - 0.5 10.5 NA

1.0-1.5 10.2 NA
Background #5 0.0 - 0.5 8.1 NA

1.0-1.5 11.5 NA
Background #6 0.0 - 0.5 7.7 NA
Dup 1* 0.0 - 0.5 8.9 NA

1.0-1.5 7.5 NA
Background #7 0.0 - 0.5 7.5 NA

1.0-1.5 12.5 NA
!3ackground #8 0.0 - 0.5 7.5 NA

1.0-1.5 6.7 NA
Background #9 0.0 - 0.5 3.1 NA

1.0-1.5 3.2 NA
Background #10 0.0 - 0.5 18.9 NA -

1.0-1.5 11.9 NA Bac~ground #11 0.0 - 0.5 9.3 NA -------

1.0-1.5 7.8 NA
• Duplicate Sample
Table 9-Tables.xls 02/16/2000

Table 10
Analytical Results for Soil Geochemical Parameters1
Cal Spray Site, Watsonville, California
Sample Sample Concentration (mg/kg) Red-Ox
ID Depth Total Potential
(ft bgs) Iron Manganese Organic Carbon Sulfate Sulfide pH (mV} CH37 1.75 - 2.25 20,000 330 1,800 57 <10 7.3 380

7.5 - 8 16,000 560 520 830 <10 7.5 360
CH38 4 -4.5 18,000 95 1, 100 380 46 4.2 470
10-10.5 17,000 280 510 730 10 6.4 350
1 Samples collected by Cambria Environmental, November 1998 Table 10-Tables.xls 1212/99

Table 11
Summary of Remedial Action Alternatives for Area 1
Cal Spray Site, Watsonville, California
Alternatives Remediation Approach
1) No further action No further action
2) Asphalt cap Construction of asphalt cap over entire site except N and SE of tire store.

Includes utility corridors.
3) Hot-spot removal with Soil excavation and disposal from hot spot areas Asphalt cap Construction of asphalt cap over entire site except N and SE of tire store.

Includes utility corridors.
4) Top 2 feet and hot-spot Soil excavation and disposal from top 2 feet removal, with asphalt cap Soil excavation and disposal from hot spots Construction of asphalt cap over entire site except N and SE of tire store.

Includes utility corridors.
5) Removal of Top 2 feet Soil excavation and disposal from top 2 feet with asphalt cap Construction of asphalt cap over entire site except N and SE of tire store.

Includes utility corridors.
6) Sitewide Excavation Soil excavation and disposal from areas with As and Pb levels above cleanup criteria
Restoration of asphalt paving
7) In-situ Stabilization In-situ stabilization of soil in areas with As and Pb levels above cleanup with asphalt cap criteria
Construction of asphalt cap over entire site except N and SE of tire store. 8) Ex-situ Stabilization Ex-situ stabilization of soil in areas with As and Pb levels above cleanup with asphalt cap criteria
Construction of asphalt cap over entire site except N and SE of tire store.

Operation and Maintenance included for all alternatives except Alternative 6. 12/2/99 Page 1 Tables.xis

Table 12
Evaluation of Remedial Action Alternatives for Area 1
Cal Spray Site, Watsonville, California
Alternative Effectiveness Implementability Cost*
Short Term Long Term 30 Year
NPV Costs**
1) No further action High: Low risk of worker exposure Low: All impacted material remains High: No soil Low: $224,000 (no excavation). ·onsite. excavation.
2) Asphalt cap High: Low risk of worker exposure Moderately High: Eliminates exposure High: No soil Moderate: $487,000 (no excavation). pathway. However, all impacted excavation. material remains onsite.
3) Hot-spot removal with Moderate: Moderate risk of worker Moderately High: Eliminates exposure Moderately High: Moderate: $1,415,000 asphalt cap exposure (moderate excavation). pathway. Significantly reduces volume Small excavation area. of impacted material.
4) Top 2 feet and hot- Moderately Low: Moderate risk of Moderately High: Eliminates exposure Moderately low: Large Moderate: $1,872,000 spot removal, with worker exposure (moderate pathway. Significantly reduces volume excavation area. asphalt cap excavation). of impacted material. Effectively Limited usable onsite prevents exposure in case of breach of space.
asphalt.
5) Top 2 feet removal, Moderate Low: Moderate risk of Moderately High: Eliminates exposure Moderate: Large Moderate: $1,376,000 with asphalt paving worker exposure (moderate pathway. Reduces impacted material. excavation area. excavation). Effectively prevents exposure in case of Limited usable onsite breach of asphalt. space.
6) Site-wide excavation Low: High risk of worker exposure High: Eliminates exposure pathway. Low: Very large High: $3,375,000 (large excavation). Removes all impacted material. excavation area.

Limited usable onsite
space.
7) In-situ stabilization, High: Low risk of worker exposure Moderately High: Eliminates exposure Low: Inherent High: $1,832,000 with asphalt cap (no excavation). pathway. Reduces mobility and toxicity. technical difficulties to All impacted material remains in onsite. stabilize an area this large.
8) Ex-situ stabilization, Low: High risk of worker exposure Moderately High: Reduces mobility and Low: Large excavation High: $2,206,000 with asphalt cap (large excavation). toxicity. All impacted material remains area. Limited usable onsite. onsite space. Inherent
technical difficulties.
1212199 Tables.xis

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' \ , I A l L j .. CH2MHILL
13624502 EA Local•onMap • 11123199 ajg SFD Source: The Thomas Guide. Monterey County Street Guide and Directory. 1991 Updated Ed1t1on. c ..

Site Location
Cal Spray Site
135 Walker Street
Watsonville, CA

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,__ __
Scale fn Feet
Figure 2

SITE MAP
Cal Spray Site 135 Walker Street
Watsonville, California
- RIVERSIDE DR
29-lllOV-199!1

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---
-----
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Basal gravel unit -------------
----
--------
------
200'
------------
Aromas Red Sands
Source: Gedogy and Groundwater of the
Pajato Valley Area
Santa Crol and Monterey Counhu, California
USGS, 1972
138245.02.EA • W.f: Cal $prll!I' Sll<ll • 11/23199fltil $FO o 1 2 Miles
200'
100'
Sea Level
100'
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300'
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Figure 3
Regional Hydrogeologlc Cross Section
Cal Spray Site
Watsonville, California
CH2MHILL

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0 25 50 75 ,...__ Seate In Feer
Figure 4

BORING LOCATIONS

CAL SPRAY SITE
135 Walker Street
Watsonville, California
CH2MHILL

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0 25 50 75
es; - I
Scale In Feet
Figure 5

GEOLOGIC CROSS SECTION LOCATIONS

CAL SPRAY SITE
135 Walker Street
Watsonville, California
wa1sont.dgn 29-NOV-1999
L_~~~~~~~~~~~~~~:='.~c:.._~~~~~~R~N~ER~S~ID~E~D~R~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~C:ft2IVIHILL~~--'

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30 40
LEGEND
~ ~ Fill Material
D Sand, Gravel
(SW ' S P, SC, GW, GP, GC)
Clay, Silt (CL, ML)
~ Organic Clay (OH)
Scale:
oc ==2·5 --50'
1" = 50'
Vertical Scale = 5x
(Surface elevations ha
not been surveyed) ve G
First Encountered
roundwater
-?--- UContact (Queried Wh ncertain) ere
See ~igure for Cros
Section Location sG
Figure 6
eolo g1c · Cross Section A-A'
Cal Spray Site
Watsonville. California
CH2M HILL

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en
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0 10
e 20 <.:>
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LEGEND
lmi Fiii Material
D Sand, GraS~elGW GP GC) (SW, SP, ' ' ' .
!'~I Clay, Silt (CL, ML)
~ Organic Clay (OH)
Scale:
0 25 50'
1" = 50'
Vertical Scale = 5x
(Surface eleva t. ns have 10 d) not been surveye
First Encountered
Groundwater
Contact (Querii:id
-?- _ - Where Uncertain)
See Figure to~ CrossSection Location
lo ~ C')
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?
Figure 7 .
8 ,
Geolog1c . Cross Section . BCal Spray ~1te .

Watsonville, Cal1forn1a
CH2M HILL

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136245 02.EA • c-c· Cal Spray Sile• 11123/99 arn SFO
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Scale:
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?
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(Surface elevations have
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~ Organic Clay (OH)
First Encountered
Groundwater
_ 7 _ _ Contact (Queried
- Where Uncertain)
See Figure for CrossSection Location
,,....
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0 10
SW·

16.0 ? 20
30 Figure 8
Geologic Cross Section C-C'
Cal Spray Site
Watsonville, California
CH2M HILL

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'/
;/
LEGEND
Scale:
0 25 50' ml 1" = 50'
[] . (SW, SP, SC, GW, GP, GC) Vertical Scale = 5x (Surface elevations have not been surveyed) ,/-/
Clay, Silt (CL, ML)
/ ./
Organic Clay (OH)
yr First Encountered Groundwater
-?- _ Contact (Queried
..
- Where Uncertain)
See Figure for CrossSection Location
10 20
30 Figure 9
Geologic Cross Section 0-0'
Cal Spray Site
Watsonville, California
136245.02.EA • 0-D' Cal Spray Sile• 1 t/23/99 aJQ SFO CH2M HILL

ll
r I
ll
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Q'}
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...,
(I)
...,
Q'}
CH33
(;>,
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Q'} 4.5'
CHiil
(
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c

RIVERSIDE DR
CH20
(lJ 5'
(lJ 5'
om
v
I
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Figure 10
Estimated Fill Layer Thickness
Cal Spray Site, Watsonville, CA
13624502EA ·Con1D<J<11h8· 11f.!J/99aJQSFO CH2MHILL-------...J

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PARCEL
A
B
c
D
E
F
LJ J. Oksen I
11(10/6/1892)
W. Sullivan
(9/28/1801)
H N. I
H D.Jessen (3/17/1 B,iJ6)
LJ J. Oksen I
11(10/6/1892)
H N. Lindbirg I (6/27/1895)
I Sullivan et al I (1111411oi r
E. I. Oksen I
1--_._---l (3/9/28)
H Sullivan et al (4/22111) J. Sullivan
($/27/11)
C. R. Kallam California ;
(11/3Q3) Spray-Chem c4:
. (11/3/23) :

California
Spray-Chem Co.
(11/13/23)
F. S. Oliver (3/25/2-i)
W. M. Davis (3/24/20) H C. W. Horstman (7/5/21)
F. C. Thornton (715/41)
Lindberg
(219/16)
I Geo. B. P;ilger I I
I N. N. Lindberg -[ ,1111140) I
I _J F. J. & L. Rodgers I (219/16) fr! ! (3/22116)
1 .

C. 8. Maxwell (2124/03) J.V. (9/5/05) . G · · ; Rodgers et al J. R. Marlow L. & C.H. (11/18105) [ (1/23/27)
. • I•• • • • • • • • • • • j I W. Trevethan (S/12/24) f1-.j: M. D. McSherry (4/8/09) I ! M. J. (6/15/06) f- H l J. Edwaids (10/14/07) ft- L. Rodgers (1117125) ftH U A. J.
11 (7124157)
HS.Ybarra
H D. G. S. I
-- ---
L. R. M. Marquez
(8(,8/46) (2/14/62)
V. (10/13/47) i
H W/HOrd I
N. N. Lindberg (91i2142)
A. C. Smith (3/1214J)
.1.

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.. .
.: .
, City of
/ '
i
·=· ....•.... '
• • • • • • • ; • • • • • • • • l" • .; • • " • • • • • ,,; • • • • • • • • • • • j·
Rodgers efal
(3/15/461
. r
Cont$iner Equipment qo.
. : ' . . . . . . . . . .. . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . •\ . . . . . . . . '" .

I G. A. Morehead f 11 /2/05) · fl G. A. MoreheiicJ 2126106 f F. & Pajaro V. RC. J. Valentine (6/30/41) tUJ
UJ
en
YEARS 19·00
tri G
::::i
g F _,

ABC D H

RIVERSIDE DRIVE
1 (8/9118) r -
1910
Not to scale
x
}

CALSPRAY SITE
19;20 19·30
S:ut:e: amcm1eSurnrray, 135Wa11<erS1reet
Michael S. Maiorana, 1996
Sav. Bnk. Benkln
(2114/33) (3131/37) Pajaro V. Sav. Bnk.
(8/10/40)
1940 1950
H. Valentine (7.(21/53)
H. Valentine (719/53) I
1960 1970 1980
Figure 11
Timeline - Area 1 Parcel Summary
Cal Spray Site
Watsonville, California
CH2M HILL

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11 )
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J
J
lt
] ]
j
J
j
JI
J
j
CH32-$-
a;
l!?
U5
Ci)
::J
()
0 _J
CH33-$-
Source:

I
--------------·-------·-·-----·-·-\ Area 3
\
Area 2
\ 0 Concrete
CH3 + CH21 Still
\ -$-
c \ Rotort G CH12 c;);rnaces
Pump
House
CH13 + CH22
CH37
:$'CH37B
CH23
-
\ c:aa
-
0 B-5
CJ Lime Kiln
Lead n
OCH.lo '!'" B-1
Existing
Pole Shed
\
-$- CH24
B-7
\
\
c 5
0 .

Strychnine r; -
1 Water
CH26 £> Tanks .in.
1 J Tower 'O Concrete CH16'!'" 0 Underground _ B-6 \
-$-CH2 B-4Q__
\...--
-
CH25 Former
Gate
Property
Boundary
-
Oil Tanks -
-
-
- -
B-30 !
-$-CH18
CH1J
Riverside Drive
Sanborn Fire Insurance Map (December 1920)
j S>o
CH20+
CH27
-$-
CH4
-$-
'2.

Legend
-*- Fence
-$- Soll Boring
Note:

Boring locations are approximate.
'B
CD
\!'..
0 20 40 60
Scale in Feet
_; Figure12
Former.Onsite Structures
.... :;·.:Area 1
carspray Site
135 Wa.lker Street
·:Watsonv111e CA
:

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,
PAJARO

JUAN RD
--
.

I
Legend
0 Soil Sample Location
-+Municipal Well Location
N
0 2000
Scale In Feet
Figure 13
Locations of Offsite
Background Soil
Samples
Cal Spray Site
135 Walker Street
Watsonville, CA
:n
0 ' CH2M HILL
136245.02 EA Soil Sarnpling(Avd) • 11/23199 a19 SFO Source: The Thomas Guide. Monterey County Street Guide and Directory. 1991 Updated Edition.

I
-1
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1-0 . 3.6
·2.0'. 31.7

6.0 .. 9.14
Existing
Pole Shed CH14
CH12
,.,,_ •;; •··· CH&- . •~ · •
D~pth .-TPH' ·. As Pb.
11>-0:ii' 'i:35".' "'9,5. ·12.5

18.0~,i '<as' -1u1. 11.9
CHS
CH15
~
Riverside Drive
CHS
Note:

Legend
-*- Fence
-$- Soil Boring
NA= Not Analyzed.

All values in mg/kg.
0 P""'I
20 40 -
Scale in Feet
60 *Note: Where duplicate samples
were collected, the higher
concentration is reported.

Figure 14
Soil Analytical Data
Area 1
Cal Spray Site, Watsonville, CA

11 II
fl
ti
II
[ l
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r 1
[I
l I
l 1
ll
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11 . J
136Z45.02-E.'l•ot1$1118onng5w1lhls•1!/23/99•jgSFO
;A&• ;Pb
Ml"
Depth- M Pb
0·0.!5 118 197

4.5. 5.0 9.6 16.2

9.5 · 10.0 2.59 6.87

14.5. 15.0 3.34 5.3
M2 .c::·:-···
:':Pb·
. .300-; 258·

1.92 5.52·
'
;,:oepcti.·1·.w .,,
. o.s,'1.0 .. 1,••·•.'l "2. '5.2- 7.9 9.5··10.0 - (.8 5.3

15.0 32· 3,3·

1.2 .. 3.5.
. t.8 3.1
CHr.J
CH22 >
[ ... ,,,.,_,.,i.,.;;,:i
'. ":1-.«t:sr_··· 2.s;;t )790·
Legend
--*--Fence
8 Soll Boring
Note:

All values In mg/kg.
'Note: Where duplicate
samples were collected,
the higher concentration
is reported.
//
0 20 40
Seate in Feet
Figure 15
Soil Analytical Data
Areas 2, 3 and 4
60 Cal Spray Site, Watsonville, CA
CH2MHILL
-
...
. '..;.., ... :.
.. -;
..
\.: ..
·""' ..
..
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•
. "
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....

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Figure 16
Remedial Alternative Costs for Area 1
$4,000,000
$3,500,000 $3,375,000
$3,000,000
$2,500,000 .
$2,000,000 $1,872,000
$1,500,000
$1,000,000
$500,000
$0
1 2 3 4 5 6 7 8
Alternative

-
-
,_
Remedial Action Implementation Report
135 Walker ~»treet
(Former Cal Spray Site A1rea 1)
Watsonville, California
Prepared for
Chevron Environmental Management Company
June2002
CH:2MHILL
155 Grand Avonue, Suite 1000
Oakland, California 94612

This report has been prepared for Chevron Environmental Management Company by CH2M HILL under the supervision of:

No. C-048882
Exp.~p;q'tti-:

Demorest, P.E.

Proj ct Engineer
Keith R. Sheets, R.G.

Project Manager
SFOIAREA 1_FlNALOOC

• ...

CH2M HILL
June 19, 2002
166867.01.EA
Barbara Cook
Department of Toxic Substances Control
700 Heinz Avenue
Suite 200
Berkeley, CA 94710-2737
Attention: Ryan Miya
CH~M HILL
155 Grand Avenue
Sui·e 1000
Oal:land, CA
94612
P.O. Box 12681
Oal;land, CA
94€04-2681
Tel 510.251.2426
fa); 510.893.8205
Subject: Submittal of Area 1 Final Remedial Action Implementation Report, Cal Spray Site, Watsonville, CA
Dear Ms. Cook:

Enclosed are two copies of the Area 1 Final Remedial Action Implementation Report for the Cal Spray site. CH2M HILL is submitting this report on behalf of Chevron Environmental Management Company, LLC.

This report has been prepared for Chevron by CH2M HILL, under the direction of Ana Demorest, PE and Keith Sheets, RG.

If you have any questions please call me at 510-251-2888 ext. 2101 or Curt Peck/ChevronTexaco at 925-842-3561.

Sincerely,
CH2M HILL
Keith Sheets
Project Manager
cc. Richard Hammond
SFO\Areal_ooverltr.doc

Contents
Signature Page ............................................................................................................. , ................. i Contents ......................................................................................................................... , ................ ii

1.0 Introduction .................................................................................................................. 1-1

1.1 Background ............................................................................................................. 1-1

1.2 Report Organization ................................................................................. ., ............ 1-2

2.0 Field Activities ..................................................................................................................... 2-1

2.1 Summary of Construction Activities .................................................................... 2-1

2.2 Health and Safety .................................................................................................... 2-1

2.3 Excavation ................................................................................................................ 2-2

2.3.1 Site Preparation and Demolition .......................................................... 2-2

2.3.2 Soil Excavation ........................................................................................ 2-2

2.3.3 Soil Disposal ............................................................................................ 2-2

2.4 Asphalt Cap Construction ..................................................................................... 2-2

2.5 Air Monitoring ........................................................................................................ 2-3

2.5.1 Total Suspended Particulate Sampling ................................................ 2-3

2.5.2 Industrial Hygiene Air Samples ........................................................... 2-5

2.5.3 Real-time Dust Monitoring .................................................................... 2-5

2.6 Site Restoration ........................................................................................................ 2-5

3.0 Monitoring Well Installation ............................................................................................ 3-1

4.0 Deviations from RAW or Construction Plans ............................................................... 4-1

5.0 References ............................................................................................................................ 5-1 List of Tables
1 Chronology of Activities
2 Total Suspended Particulate Air Monitoring Results
3 Industrial Hygiene Sample Results
4 Real-Time Dust Monitoring Results
List of Figures
1 Location Map
2 SiteMap
3 Air Monitoring Station Locations
Appendices
A Record Drawings
B Concrete Inspection Records
C Asphalt Pavement Section Inspection and Testing Records D Laboratory Reports for Air Monitoring
E Soil Boring Logs and Monitoring Well Completion Diagrams F DTSCApproval Letter for Asphalt Pavement Re-Design
SFO\AREA1_FINAL2,00C

1.0 Introduction
This closure report presents a summary of final site conditions and a description of remedial activities performed at 135 Walker Street, also known as Area 1 of the Chevron Chemical Cal Spray site, located in Watsonville, California (Figure 1). Remedial activitie:; were performed in accordance with the Remedial Action Work (RAW) Plan prepared by CH2M HILL and submitted to the California Environmental Protection Agency, Department of Toxic Substances Control (DTSC) in March 2001. The RAW was formally apprnved by DTSC in a letter dated July 26, 2001. Field activities were performed during the period of July 2001 through November 2001 by CH2M HILL Constructors, Inc. (CCI).

1.1 Background
The California Spray and Chemical Company, a predecessor of Chevron Chemical Company, was formed in 1907 to produce lead arsenate insecticide spray to control coddling moths which were damaging apple orchards in the Pajaro Valley. The manufacturing plant was constructed in 1908 at the Cal Spray site, and produced lead arsenate, lime-sulfur solutions, and strychnine. The manufacturing process was discontinued from the site in 1929. Warehouse operations continued at the site until the early 1950's.

The Cal Spray site is comprised of four areas. The property located at 135 Wall~er Street is referred to as Area 1, and is the location of the former Cal Spray operations. Area 1 is bounded on the north by Walker Street, on the east by Riverside Drive, and on the south by Locust Street. Two parcels bound the property to the west. The southernmost property, located at 228 Locust Street, is referred to as Area 2. The northernmost property-, located at 131 Walker Street, is referred to as Area 3. Area 4 is west of Area 2 and south of Area 3, and is located at 234 Locust Street.

Investigations were initiated at Area 1 in 1996 after discolored material was du;covered during the construction of a new building. Nine sampling events have been conducted on or around the Cal Spray site between 1996 and 1999. The results of investigations conducted at the site indicate that lead and arsenic in soil are the only chemicals of potential concern (CPOC) at the Cal Spray site. Furthermore, an evaluation of analytical data coEected during the field investigations (combined with a calculated ambient, or background arsenic concentration of 18 mg/kg) indicates that the horizontal extent of arsenic- and leadimpacted soil at the Cal Spray site is limited to Area 1, the northern portion of Area 2, the southeastern comer of Area 3, and the northern and southern portion of Area 4.

Groundwater beneath the Cal Spray site does not appear to be impacted by arE.enic or lead.

The following DTSC-approved residential soil cleanup criteria were established for the site:
• For arsenic: a sitewide average of 18 mg/kg based on the 95th quantile (the average shall be determined for each Area separately).

SFO\AREA 1_FINAL2.DOC 1-1

1.0 INTRODUCTION
• For lead: a sitewide average of 210 mg/kg based on the 95th percent upper confidence limit of the mean (the average shall be determined for each Area separately).

The approved remedial action for Area 1 consists of construction of an engineered asphalt cap over the entire site, except north and southeast of the tire store building, where soil data indicate these areas were not impacted by Cal Spray residues. This alternative requires a deed restriction, the installation of clean utility corridors, and operation and maintenance (O&M} of the asphalt cap. The deed restriction will require that the land use for this property be restricted to industrial.

The major components of the selected remedy for Area 1 were as follows:
• Site preparation/ demolition
• Soil excavation
• Asphalt cap construction
• Site restoration
The area to be capped as identified in the RAW is shown on Figure 2.

1.2 Report Organization
This report includes the following sections:
• Summary of Construction Activities
• Health and Safety
• Excavation
• Asphalt cap construction
• Air Monitoring
• Site Restoration
• Monitoring Well Installation
• Deviations from RAW
• References
SFO\AREA UINAL2.DOC 1-2

2.0 Field Activities
Section 2 describes the construction activities including health and safety, excavation activities, air monitoring, asphalt cap construction, and site restoration of Area 1.

2.1 Summary of Construction Activities
The general chronology of activities is shown on Table 1. Mobilization activities began on July 23, 2001. Site preparation activities included the setup of staging areas, decontamination areas, and dedicated air monitoring stations. Air monitoring for arsenic and lead dusts, which was performed throughout the project during remedial excavation activities, is described in Section 2.5. Record Drawings for all remediation activities for all areas of the Cal Spray Site are included in Appendix A.

2.2 Health and Safety
All work at the site was performed in accordance with all applicable sections of the Occupational Satty and Health Act (OSHA), 29 Code of Federal Regulations (CFR) 1910 and 1926; specifi ally Title 8 California Code of Regulations 5192. All work performed at the site followed the 1 TSC-Approved site-specific Health and Safety Plan (CH2M HILL, July 2001). The following health and safety measures were taken during the remediation:
• All excavatioj;l work was completed in Level C and D personal protective equipment (PPE) as per ~e Health and Safety Plan.
• An equipment and personnel decontamination area was setup in the westem portion of Area 1. Decontamination of equipment was performed with pressured wati?r and by scraping of 1 1 se material. Decontamination procedures for personnel included a boot and glove wa h and rinse, removal and proper disposal of outer clothing such as Tyvek, hand and fac wash and rinse.
• Dust control easures were implemented during all excavation activities. Dust control was achieved by spreading water with a water "buffalo" (trailer) and direct spraying from a fire h e. Approximately 2000 gallons of water were used for dust suppression each day exc vation activities occurred.
• Air monito · g and real-time dust monitoring was performed during periods of excavation activities as per the RAW and Health and Safety Plan. Details regarding air monitoring are provided below in Section 2.5.
• Noise monitoring was conducted using a Quest Model 2700 decibel meter during activities sucti as heavy vehicle and equipment operation, saw-cutting, generator operation, and excavation equipment operation. Readings were collected approximately every 30 minutes within the Exclusion Zone and at the perimeters of the Exclusion Zone, Decontamination Zone, Support Zone, and Site and compared to action lev1~l of 85 decibels. No,e action levels were not exceeded at any time during the projEd. !
SFO\AREA1_FINAl.2.00C 2·1

2.0 FJELD ACTIVITIES

2.3 Excavation

2.3.1 Site Preparation and Demolition
Site preparation and demolition activities in Area 1 included modifications to an existing pole shed, asphalt and concrete demolition, and fence removal. The shed modifications, which included raising the shed on three sides, were performed to allow equipment access after the placement of the asphalt cap. The concrete and asphalt demolition was performed to facilitate the construction of the cap. Asphalt and concrete rubble generated during demolition activities was transported to Buena Vista Landfill for recycling. Fence removal was performed to allow the construction of new retaining walls along the perimeter of the property. The demolition plan for the site is shown on Sheet 1 of the Record Drawings (Appendix A).

2.3.2 Soil Excavation
Soil excavation in Area 1 was performed in limited areas to allow for placement of the asphalt concrete cap, including construction of the retaining walls and drainag·~ facilities. It is estimated that approximately 150 cubic yards of soil were excavated. With the exception of trench excavations for the drainage facilities, the maximum excavation depth was approximately 1 foot. The excavated soil was loaded into roll-off bins and handled as per the soil management plan provided in the RAW. The excavation and removal plan is shown on Sheet 2 of the Record Drawings (Appendix A).

2.3.3 Soil Disposal
All soil was disposed of as non-RCRA California hazardous waste. Material Wi:lS transported to Waste Management Incorporated's Kettleman Hills facility by Lutrel Trucking, Inc.

2.4 Asphalt Cap Construction
The remedial construction activities in Area 1 included the construction of an asphalt cap to eliminate the exposure route to lead and arsenic-impacted soil present at the site.

Construction of the cap included construction of perimeter retaining walls, installation of drainage structures, and placement of the asphalt concrete (AC) pavement sechon. The capped area, which encompasses approximately 61,000 square feet, is shown on Figure 2 and Sheet 4 of the Record Drawings. The locations of the retaining walls are shown on Sheet 4, drainage structures are shown on Sheet 3. Details associated with the cap co11struction, including drainage facilities and retaining walls, are presented on Sheets 6 through 8 (Appendix A).

Prior to installation of the asphalt pavement section, retaining walls were installed to provide storm water containment and control and to protect the asphalt edge integrity.

Drainage structures, including drainage grates and piping were also installed. The retaining walls and drainage structures were installed per the approved plans by DCM Construction between August 31 and October 27, 2001. Prior to any placement of concrete, DCI Inc., a certified concrete construction inspector, inspected the form work, reinforcing steel, and clearances. In addition, DCI observed each concrete pour and performed the required SFOIAREA 1_FINAL2.00C 2·2

2.0 FIELD ACTIVITIES
concrete testing. The daily inspection reports and cylinder break test results are included in AppendixB.

The asphalt pavement section, including the leveling course, was constructed by Goebel Paving between October 10 and November 2, 2001. The asphalt pavement section includes a 7-inch layer Caltrans Type "B" asphalt concrete (AR 8000) underlain by a minimum of 4- inches of Caltrans Class II aggregate base (AB). Because the AB was used to level the site in accordance with design grades, the AB thickness ranges between approximately 4 and 12 inches. The asphalt cap was generally constructed over existing asphalt. To facilitate placement of the AB, a bonding agent was used between the existing asphalt and the AB.

The AB was compacted to a minimum of 95 percent relative compaction per ASTM 1557.

The asphalt was placed in two layers: a 4-inch layer overlain by a 3-inch layer. A pavement reinforcing fabric was placed between the asphalt layers to minimize reflective cracking and to provide additional support against rutting under potential high-pressure loading caused by forklift traffic. The asphalt was compacted to a minimum of 95 percent relative compaction. A third party inspector, measuring depth, temperature and relative compaction density monitored the installation of the asphalt. The asphalt inspection reports are included in Appendix C.

2.5 Air Monitoring
The purpose of the air monitoring program was to provide onsite, upwind, and downwind ambient air monitoring to determine whether contaminated soils were released off site during remedial work, to ensure nearby residents, offsite workers, and onsite workers were not exposed to impacted dust, and to ensure the project complied with the state and federal air quality regulations. Air monitoring was performed during all excavation activities that occurred on Areas 1, 2, 3, and 4 using the following three methods:

1. Ambient air monitoring was performed using Total Suspended Particulate (TSP) sampling using a standard Hi-Volume TSP air sampling system.

2. Industrial hygiene air samples were collected using Dupont Alpha-1 Air Sampling pumps.

3. Real-time measurement of airborne particulates was performed using a Miniram PDM-3 dust monitor.

The details and a summary of the frequency, methodology, and results of each of these methods are discussed below.

2.5.1 Total Suspended Particulate Sampling
Ambient air sampling was performed using the standard Total Suspended Parliculate (TSP) sampling system. This type of sampling was performed to evaluate if elevated concentrations of lead and/ or arsenic were being carried offsite during soil remediation activities. The TSP filters collected during this monitoring activity were analyzed for arsenic and lead using United States Environmental Protection Agency (USEP A) Contract Laboratory Program (CLP).

SFO\AREA1_FINAL2.DOC 2-3

2.0 FIELD ACTIVITIES
Air samples were collected at three locations along the perimeter of the site us:lng high volume air samplers (See Figure 3). The air monitoring samplers were set up and periodically calibrated by Tracer ES&T, Inc. as per the RAW air monitoring plan. CCI performed the collection of air samples over an approximate 8-hour period during remedial excavation activities. Background air monitoring, prior to the start of remedial soil excavation activities, was performed during the period of August 6 through August 8, 2001 to determine the background concentrations of lead and arsenic in the ambient air. A summary of the TSP air monitoring results, which documents air quality prior to and during remedial construction activities is provided in Table 2. The Filter B air samples were collected from the upwind monitoring station, and air samples from Filters A and C were collected from downwind monitoring stations. Copies of the certified analytic.:il reports are provided in Appendix D.

Based upon these results, an evaluation was performed using state and federa] exposure guidelines. The following presents the results of that evaluation.

Arsenic
Several arsenic exposure guidelines are published. The American Conference of Government Industrial Hygienists (ACGIH) threshold limit value (a time-weighted average in workroom air for an &-hour day) is 10 µg/m3 (ACGIH, 2000). The California Occupational Safety and Health Administration (Cal/OSHA) permissible exposure limit for ·Construction workers is 200 µg/m3 (&-hour time weighted average) for organic arsenic and 10 µg/m3for inorganic arsenic (OSHA, 1996). National Institute for Occupational Safety and Health (NIOSH) (NIOSH, 1997) has recommended 2 µg/m3 as the limit. The State of California has published an acute Reference Exposure Level (REL) of 0.19 µg/m3 (OEHHA, 2002). The acute REL is intended to protect an individual from adverse health effects due to short-term exposure (i.e., 4-hour exposure). The results of the arsenic monitoring·indicate that the maximum concentration of arsenic detected at the downwind monitoring station was 0.15 µg/m3 (detected on September 11, 2001). This maximum concentration is less than the acute REL established by OEHHA and far less than either the OSHA or ACGIH valuE!s.

It is apparent from the above results that inhalation of arsenic and lead in dust as a result of excavation activities are well below ambient air quality standards for individuals or industrial workers. It is therefore concluded that adverse health impacts would not be expected to occur to the onsite workers or offsite residents or workers.

Lead
Lead-bearing dust and fumes serve as the major sources of exposure for worke:rs through the inhalation and ingestion pathways (ATSDR, 2000). The California OSHA permissible exposure limit (PEL) for lead in the workplace is 50 µg/m3 averaged over an 8·J1our workday for workers in general industry. The NIOSH recommended the exprnmre limit of 50 µg/m3 to be maintained so that worker blood lead remains less than 60 µg/ dL of whole blood. The ACGIH has set a threshold limit value for a time-weighted average (TL V /TWA) of 50 µg/m3 for lead in workspace air. The TL V /TWA guideline represents the average concentrations to which most workers may be exposed without adverse effects. Finally, EPA has set a National Ambient Air Quality Standard for lead of 1.5 µg/m3 averaged over a calendar quarter. This standard is intended to protect the most susceptible pemons (e.g., SFOIAREA 1_FINAl.2.00C 2-4

2.0 FIELD ACTIVITIES
children) in the general population. The results of the lead monitoring indicat•:! that the maximum concentration of lead detected at the downwind monitoring station was 0.162 µg/m3 (detected on September 11, 2001). This maximum concentration is less than the PEL {50 µg/m3) established by OSHA and NIOSH for workplace safety.

It is apparent from the above results that inhalation of lead in dust as a result of excavation activities are well below ambient air quality standards for individuals or industrial workers.

It is therefore concluded that adverse health impacts would not be expected to occur to the onsite workers or offsite residents or workers.

2.5.2 Industrial Hygiene Air Samples
Industrial hygiene samples were collected following NIOSH Analytical Method 7300 to evaluate airborne exposures for construction workers to arsenic and lead during the first two days of soil excavation activities at the Chevron Cal Spray site, and to evaluate concentrations of lead and arsenic in the ambient air at the fenceline. Industrial hygiene air samples were collected using Dupont Alpha-1 Air Sampling pumps fitted with 37 mm sampling cartridges that contained a 0.8 µm cellulose ester membrane filter. Sampling pumps were calibrated prior to and after sampling activities using a Mini-Buck wet cell calibrator.

Air samples were collected during the first two days of excavation activities in Area 2.

Samples were collected to evaluate personal exposure to arsenic and lead during the excavation of contaminated soil to evaluate if the level of personal protective equipment worn by onsite personnel was appropriate. Additionally, air samples were colJlected along the fence line located between Area 2 and Area 4 to evaluate if arsenic or lead were being carried offsite and towards the residence located in Area 4. Sampling pumps were typically started at the beginning of both shifts and were allowed to run for a total of around 8 hours.

The sampling locations and the results of the industrial hygiene samples are shown on Table 3. None of the samples contained arsenic or lead above the analytical det·~ction limit of

0.001 mg/ m3.

2.5.3 Real·time Dust Monitoring
Real-time measurement of airborne particulates was performed during all excavation activities using a Miniram PDM-3 dust monitor. Readings were initially collected at 15 minute intervals, and later adjusted to 30 minutes. The dust monitors was used to measure dust at various locations around the site. Table 4 summarizes the times, locations, and results of the real-time dust monitoring. As per the Health and Safety Plan (CH2M HILL, 2001), based on worst case dust exposure calculations, the permissible limit for a total dust mixture was 0.11 mg/m3 (with a safety factor of 4 built into the equation). All dust measurements were well below this concentration for the duration of the excavation activities.

2.6 Site Restoration
Site restoration activities in Area 1 included the installation of a 6 to 8 foot high commercial chain link fence with brown PVC privacy slats. Fence posts were installed through and into SFO\AREA 1_FINAL2.DOC 2·5

2.0 FIELD ACTIVITIES
the retaining wall in most locations. However, in areas where the retaining walls were offset from the original fence line, the fence was installed behind the retaining wall. The new fencing replaced the existing fence along the same fence line. Two new rolling gates were installed at the entrances on Riverside Drive and Locust A venue. The fencing plan is shown on Sheet 5 of the Record Drawings.

SFO\AREA1_FINAl.2.DOC 2·6

3.0 Monitoring Well Installation
Part of the O&M requirements of the asphalt cap include the installation and s,1mpling of groundwater monitoring wells. Three (3) monitoring wells were installed at the site on February 19, February 20, and March 19, 2002, at locations shown on Figure 2. The monitoring wells were installed to total depth ranging from 30.0 to 34.5 feet bgs. All monitoring wells were constructed with 2-inch diameter Schedule 40 PVC with 10 feet of

0.020-inch slotted screen and completed with a steel flush-monnted well box. Soil boring logs and well completion diagrams are included in Appendix E. Details regarding monitoring well installation and development will be reported in the first Groundwater Monitoring Report.

SFO\AREA 1_FINAL2.DOC 3-1

4.0 Deviations from RAW or Construction Plans
This section summarizes activities and conditions encountered during the performance of the remedial work that were found to differ from the RAW. The noted difference is as follows:
• The asphalt pavement design presented in the RAW was modified to reduce concerns regarding the pavement performance, improve constructability of the pavement section, and decrease costs of the asphalt overlay. The asphalt cap design was changed from an 11-inch full depth asphalt concrete (AC) section to a section consistin:s of a 7-inch Caltrans Type 'B' AC layer underlain by a minimum of 4 inches of Caltrans Class II aggregate base (AB). The new section included a pavement reinforcing fabric sandwiched between a 3-inch layer and a 4-inch layer of AC. The re-design is consistent with the design method presented in the Caltrans Highway Design Manual Detailed justification and engineering calculations for the pavement section re-design were presented in a letter to DTSC from CH2M HILL dated August 15, 2001. D1SC approved of the modified design in a letter dated September 61 2001 (approval letter included in Appendix F). The pavement section re-design was based on several concerns of the original design, including the following:
• The original design contained a permeable "open graded" asphalt layer to act as a drainage layer. This layer would not have the ability to drain, as there are retaining walls around the downgradient edges of the site. Further, the "open graded" asphalt layer, did not have the compaction requirements of dense graded asphalt, therefore the pavement may be susceptible to rutting. This layer was removed from the design.
• The traffic index (Tl) used for the original pavement design was excessive (TI = 8.5).

Caltrans has standard Tls for roadside rests, which are applicable to the site in terms of truck usage. The Caltrans standard is T1=8 for truck roads and ramps, T1=6 for truck parking. A TI of 7 was used for the re-design, resulting in an AC t:Jhlckness of 7- inches.
• The 4-inch aggregate base (minimum thickness) was use as a leveling course, improving the constructibility of the cap. The aggregate base will also help minimize the propagation of reflection cracks.
• The addition of a pavement-reinforcing fabric will further help minimize rutting. • The asphalt specification in the original design was not a Caltrans standard asphalt 'mix' and is higher-cost. The re-design specified standard Caltrans Type 'B' AC.

SFO\AREA UINAl2.DOC

5.0 References
Agency for Toxic Substances and Disease Registry (A TSDR). Toxicological profile for lead.

Atlanta (GA): ATSDR, US Public Health Service; 2000.

American Conference of Government Industrial Hygienists (ACGIH}, 1998. Documentation of Threshold Limit Values. Cincinnati, OH: American Conference of Government Industrial Hygienists.

CH2M HILL, 2001. Removal Action Work Plan for the Cal Spray Site (135 Walker Street, Watsonville, CA). Prepared for Chevron Chemical Company, LLC. March.

CH2M HILL, 2001. Health and Safety Plan for Remedial Activities; Former California Spray and Chemical Company Site, 135 Walker Street, Watsonville, CA. Prepared fo;r Chevron Chemical Company, LLC. July.

CH2M HILL, 2002. Monitoring Well Installation and Groundwater Sampling Results Report, CH2M HILL, Chevron Cal Spray Site, Watsonville, CA. Prepared for Chevron Environmental Management Company, June.

Department of Toxic Substances Control (DTSC). Selecting Inorganic Constituents as Chemicals of Potential Concern at Risk Assessments at Hazardous Waste Sites and Permitted Facilities, Sacramento, CA. 1997.

NIOSH, 1997. "NIOSH Recommendations for Occupational Safety and Health Standards".

OEHHA, 2002. Office of Environmental Health and Hazard Assessment, The Determination of Acute Reference Exposure Levels for Airborne Toxicants, Jan 2002.

Occupational Safety and Health Administration (OSHA). Industrial exposure c:ontrol strategies and technologies for OSHA regulated hazardous substances. Vol. 1. Cincinnati:

OSHA; 1989.

OSHA, 1996. "Air Contaminants Final Rule".

SFO\AREA 1_FINAL2.00C 5-1

Tables

Construction Activity
Mobilization
Site Preparation/Demolition
Table 1
Chronology of Activities
Start
7-23-01
7-24-01
Soil Excavation, Transport, & Disposal 8-13-01
Asphalt Cap Construction
Retaining Wall and Drainage Facilities
Asphalt Pavement Installation
Site Restoration
8-31-01
8-31-01
10-10-01
11-02-01
Finish
7-23-01
8-30-01
9-07-01
11-02-01
10-27-01
11-02-01
12-04-01

Table 2: Areas 1, 2, and 3
Total Suspended Particulate Air Monitoring Results
Cal Spray Site, Watsonville, California
Activity tsp concentrations (mgim3) arsenic concentrations ug/m3 )
Monitored Date Filter A Fiiter B Filter C Filter A Filter B Filter C baseline 08/06/2001 NA 0.244 0.158 NA <0.0002 <0.0002
baseline 08/07/2001 NA ~.150 NA <0.0002 <0.0002
baseline 08/08/2001 NA .096 NA <0.0002 <0.0002
excavation 08/13/2001 0.173 0.080 0.111 0.002 0.001 0.001 excavation 08/14/2001 0.137 0.081 0.083 0.002 0.001 0.004 excavation 08/15/2001 0.214 0.059 0.149 0.004 0.001 0.004 excavation 08/16/2001 0.154 0.069 0.078 0.002 0.003 0.005 excavation 08/17/2001 0.194 0.069 0.131 0.005 0.002 0.005 excavation 08/20/2001 0.111 0.039 0.153 <0.0002 <0.0002 0.021 excavation 08/21/2001 0.177 0.072 0.080 <0.0002 <0.0002 0.003 excavation 08/22/2001 0.173 0.078 0.248 0.001 <0.0002 0.039 excavation 08/23/2001 0.119 0.068 0.322 0.010 <0.0002 0.055 excavation 08/24/2001 0.188 0.064 0.088 0.000 <0.0004 0.005 excavation 08/27/2001 0.258 0.085 0.427 0.003 <0.0002 0.053 excavation 08/28/2001 0.206 0.011 0.427 <0.0002 <0.0002 0.047 excavation 08/29/2001 0.103 0.045 0.240 <0.0002 <0.0002 0.031 excavation 09/05/2001 0.286 0.088 0.170 0.020 0.009 0.034 excavation 09/11/2001 0.217 0.111 0.767 O.Q14 0.005 0.151 excavation 10/10/2001 0.058 NA 0.232 0.016 NA 0.010
Samples with 11<11 indicate non-detect samples
NA = Not Analyzed
Table_2_With ND Corrected.xis
lead concentrations (U! lm3)
Fiiter A Filter B Filt
NA 0.008 0.005
NA 0.013 0.007
NA 0.007 0.014

0.013 0.007 0.007

0.012 0.006 0.008

0.018 0.005 0.012

0.009 0.009 0.012

0.031 0.009 0.015

0.013 0.003 0.040

0.011 0.007 0.008

0.018 0.002 0.040
<0.0001 0.005 0.064

0.010 <0.0002 0.016

0.014 0.003 0.051

0.011 <0.0001 0.043

0.007 0.003 0.033

0.024 0.013 0.035

0.029 0.014 0.162

0.027 NA 0.028
06/04/2002

Table 3
Industrial Hygiene Sample Results
Cal SDrav Site. Watsonville Callfornia
Results (for Lead and
Sample No. Date Collected Sample Location Pump# Arsenic) mgfm3 CCS-0813-01 08/13/2001 Victor Leopoldo 7253 <0.001
CCS-0813-02 08/13/2001 Aaron Wolf 10932 <0.001
CCS-0813-03 08/13/2001 Jeff Deakin 10901 <0.001
On Fence between
Areas 2 and 4 (near
CCS-0813-04 08/13/2001 front of house) 6069 <0.001
On Fence between
Areas 2 and 4 (near
CCS-0813-05 08/13/2001 rear of house) 3415 <0.001
CCS-0814-02 08/14/2001 Louis Rios 7253 <0.001
On Fence between
Areas 2 and 4 (near
CCS-0814-03 08/14/2001 front of house} 10901 <0.001
On Fence between
Areas 2 and 4 (near
CCS-0814-04 08/14/2001 rear of house) 10932 <0.001
Tables3_ 4.xls 06/04/2002

Table 4
Real-Time Dust Monitoring Results
Cal Sorav Site. Watsonville. California
Concentration Prevailing
Time (mg/m3
) Direction Location
8/13/01 8:50 AM 0 downwind immediately adjacent to excavation at sample node 19 8/13/01 9:05 AM 0 upwind corner of Area 2 and Area 4 properties at Locust St. 8/13/01 9:20 AM 0 downwind back bay door of Dixon Tire shop 8/13/01 9:37 AM 0 downwind corner of Area 1 and Area 2 properties at Locust St. 8/13/01 9:50 AM 0.003 downwind entrance at Riverside
8/13/01 10:05 AM 0 downwind immediately adjacent to excavation at sample node 19 8/13/01 10:20 AM 0.006 upwind back corner of Scotts valley building 8/13/01 10:35 AM 0.006 downwind middle of pallet shed
8/13/01 10:50 AM 0.015 downwind corner of Area 1 and Area 2 properties at Locust St. 8/13/01 11 :05 AM 0.026 downwind at power pole on Area 1 property 8/13/01 11 :20 AM 0.033 upwind outside corner of Area 2 and Area 4 at Locust St. 8/13/01 11 :35 AM O.Q16 downwind middle of Area 1 property at power pole 8/13/01 11 :50 AM 0.022 downwind at CCI office trailer
8/13/01 12:05 AM 0.017 downwind at power pole on Area 1 property 8/13/01 12:23 AM 0.028 upwind corner of Riverside and Locust 8/13/01 12:40 AM 0.028 upwind back corner of Scotts valley building 8/13/01 12:55 AM 0.023 upwind corner of Area 1 and Area 2 properties at Locust St. 8/13/01 1 :45 PM 0.03 downwind at power pole on Area 1 property 8/13/01 2:15 PM 0.021 downwind back bay door of Dixon Tire shop 8/13/01 2:33 PM 0.013 upwind outside corner of Area 2 and Area 4 at Locust St. 8/13/01 2:45 PM 0.015 downwind immediately adjacent to excavation at sample node 19 8/13/01 3:00 PM 0.019 upwind back corner of Area 4 and Area 3 property 8/14/01 8:00 AM 0 upwind outside corner of Area 2 and Area 4 at Locust St. 8/14/01 8:15 AM 0 downwind at power pole on Area 1 property 8/14/01 8:30 AM 0.003 downwind at CCI office trailer
8/14/01 8:45 AM 0 upwind corner of Area 1 and Area 2 properties at Locust St. 8/14/01 9:00 AM 0.036 downwind entrance at Riverside
8/14/01 9:15 AM 0.05 upwind corner of Riverside and Locust Area 1 property -100 yd. Behind Locust immediately
8/14/01 9:30 AM 0.03 downwind behind loading truck
outside corner of Area 2 and Area 4 at Locust St.
8/14/01 9:45 AM 0.045 upwind immediately behind excavator 8/14/01 10:03 AM 0.053 downwind back bay door of Dixon Tire shop i 8/14/01 10:15 AM 0.041 downwind Area 1 driveway at Locust immediately adjacent to excavation on Area 2 property
8/14/0111:15AM 0.05 downwind next to sample node 15
8/14/01 12:00 PM 0.061 upwind back corner of Scotts valley building outside corner of Area 2 and Area 4 at Locust St.
8/15/01 8:00 AM 0 upwind immediately behind excavator
at power pole on Area 1 property immediately adjacent
8/15/01 8:30 AM 0 downwind to excavator
8/15/01 9:00 AM 0 downwind entrance at Riverside
8/15/01 10:00 AM 0.016 downwind corner of Area 1 and Area 2 properties at Locust St. 8/15/01 10:30 AM 0.036 upwind outside corner of Area 2 and Area 4 at Locust St. 8/15/01 11 :00 AM 0.047 downwind back bay door of Dixon Tire shop middle of Area 1 propert adjacent to excavation &
8/15/01 11 :30 AM 0.038 downwind escavator
Tables3_ 4.xls page 1of3 06/04/2002

Table4
I Real-Time Dust Monitoring Results
Cal Sorav Site Watsonville. California
concentration Prevailing
Time {mg/m3
) Direction Location
8/15/01 12:30 m 0.037 upwind outside corner of Area 2 and Area 4 at Locust St. 8/16/01 8:00 0 downwind at power pole on Area 1 proporty 8/16/01 8:30 AM 0 upwind Area 1 entrance at Locust
8/16/01 10:00 AM 0.008 downwind back bay door of Dixon Tire s1op 8/20/01 8:40 AM 0 upwind Area 1 entrance at Locust
8/20/01 9:00 AM 0 downwind back bay door of Dixon Tire si1op at power pole on Area 1 propurty immediately adjacent
8/20/01 9:30 AM 0 downwind to excavator & auger
8/20/01 10:00 AM 0 downwind entrance at Riverside
8/20/01 10:40 AM 0 downwind corner of Area 1 and Area 2 properties at Locust St. 8/20/01 11 :00 AM 0 upwind corner of Area 2 and Area 4 at Locust St. at power pole on Area 1 proPE1rty immediately adjacent
8/20/01 12:15 AM 0 downwind to excavator & auger
8/20/01 1 :OO PM 0 upwind corner of Riverside and Locust at power pole on Area 1 propeirty immediately adjacent
8/20/01 1 :30 PM 0 downwind to auger
8/20/01 2:00 PM 0 upwind corner of Area 2 and Area 4 a: Locust St. 8/20/01 2:30 PM 0.02 downwind entrance at Riverside
8/20/01 3:00 PM 0.015 downwind back bay door of Dixon Tire shop 8/20/01 3:30 PM 0.023 downwind entrance at Riverside
8/22/01 7:55 AM 0 downwind Area 1 driveway at Locust
at power pole on Area 1 property immediately adjacent
8/22/01 8:30 AM 0 downwind to excavator
8/22/01 9:01 AM 0 downwind back bay door of Dixon Tire shop at power pole on Area 1 property immediately adjacent
8/22/01 9:25 AM 0 downwind to excavator
8/22/01 10:00 AM 0.03 downwind entrance at Riverside
Area 2 & Area 4 property line at back corner of Area 4
8/22/0110:30 AM 0.002 downwind house from Area 2 property 8/22/01 10:58 AM 0.013 downwind corner of Area 1 and Area 2 properties at locust St. 8/22/01 11 :32 AM 0.032 upwind corner of Area 2 and Area 4 at Locust St. 8/22/01 12:00 PM 0.06 downwind entrance at Riverside
Area 2 & Area 4 property line at back corner of Area 4
8/22/01 12:30 PM 0.023 downwind house from Area 2 property 8/22/01 1 :00 PM 0.005 downwind Area 1 driveway at Locust 8/22/01 1 :30 PM 0.014 upwind comer of Area 2 and Area 4 at Locust St. 8/22/01 2:30 PM 0.02 downwind back bay door of Dixon Tire shoo 8/22/01 8:06 AM 0 downwind corner of Area 1 and Area 2 properties at Locust St. 8/22101 8:30 AM 0.022 upwind corner of Area 2 and Area 4 at Locust St. 8/22/01 8:55 AM 0.017 downwind entrance at Riverside
8/22/01 9:30 AM 0.02 upwind back corner of Scotts valley bL1 ilding
8/22/01 9:56 AM 0.025 downwind at CCI office trailer
Area 2 & Area 4 property line at back corner of Area 4
8/22/01 11 :20 AM 0.03 downwind house from Area 2 property 8/22/01 11 :55 AM 0.028 downwind at oower pole on Area 1 prope11y 8/22/01 12:25 PM 0.02 upwind corner of Riverside and Locus1 8/23/01 8:06 AM 0 downwind corner of Area 1 and Area 2 properties at Locust St 8/23/01 8:30 AM 0.022 upwind corner of Area 2 and Area 4 at Locust St.

Tables3_4.xls page 2 of 3 06/04/2002

Table4
Real-Time Dust Monitoring Results
Cal Sorav Site. Watsonville California
concentration Prevailing
Time Cmwm3
) Direction Location
8/23/01 8:55 AM 0.017 downwind entrance at Riverside
8/23/01 9:30 AM 0.02 upwind back corner of Scotts valley building

0.025 downwind at CCI office trailer
Area 2 & Area 4 property line •it back corner of Area 4

0.038 upwind house from Area 2 property
8/23/01 11 :55 AM 0.028 downwind at power pole on Area 1 property 8/23/01 12:25 PM 0.02 downwind corner of Riverside and Locust 9/5/01 8:32 AM 0 downwind entrance at Riverside
Area 2 & Area 4 property line at back corner of Area 4
9/5/01 9:00 AM 0 downwind house from Area 2 property
9/5/01 9:36 AM 0.001 downwind at power pole on Area 1 property 9/5/01 10:00 AM 0 downwind Area 1 driveway at Locust
9/5/01 11 :11 AM 0 downwind at CCI office trailer
9/11 /01 7:55 AM 0 downwind entrance at Riverside
Area 2 & Area 4 property line at back corner of Area 4
9/11/01 8:31 AM 0 downwind house from Area 2 property
9/11/01 9:45 AM 0 downwind at power pole on Area 1 property 9/11 /01 10:30 AM 0 downwind Area 1 driveway at Locust
~/11/01 11 :53 AM 0 downwind at vi.JI omce tra11er
Tables3_ 4.xls page 3 of3 06/04/2002

Figures

/
,,,,,,..-.... .. ,_/· , .r llMT~'C~
ICMAWAt•
.........
·-· . ._ .. ·-· ,._Mn'Olft:"'
IW ....... CT ..... ~Ct ,. ........ "'lbllrl"'"'
i M.MllOllNflf
RD
~ N
0 ~ 2000
Scale In Feet
Figure 1
Site Location
Cal Spray Site
135 Walker Street
Watsonville, CA

MW-3
~
~--- ~~----

RIVERSIDE DR
' 1
' ' ' ' ' MW-2~
LEGEND
~ MONITORING WELL
r, AREA COVERED BY CAP -.J
/ /
""'
0 30 60 90
--- --Scale In Feet -
Figure 2
Site Map
Cal Spray Site
Watsonville, CA

@Monitoring
Station B
(August 15 to
October 10)
AREA4
AREA2
Monitoring
Station B
{August 6 to 14)
@
Existing
Pole Shed
Monitoring
Station C
© (August 6 to 14)
AREA1
AREA3
Monitoring @
Station C
(August 15 to
October 10)
Monitoring
Station A
(August 13 to '°'
October 10) ""'
Legend
© Air Monitoring Station
0 e -·"'-
Figure 3
Air Monitoring Station Locations
Cal Spray Site Area 2
228 Locust Street
Watsonville, CA

Appendix A
Record Drawings

I
[
1,
I
r
r
I,
I
I
'~- 1. RECORD

DRAWING
/
/
._,,_
EXISTING POWER ... ~-........

I LEFT POLE IN Pl.ACE
I
I
150 R WERSIDE

/ /
0 20 40 60
"""---SC.le I In Feet
l.EGENO;

EXCAVATJON LIMITS
NOTES:
t GRATES AND DRAINS FIELD FIT TO MATCH
GATE AND OOORWAYV'J!OTHS.

2. EXCAVATION LIMITS DO NOT INCLUDE AREAS OF

SLOPING OR BENCHING NECESSARY FOR
CONSTRLJCTION.

RECORD

DRAWING VERIFY SCALE
SAA IS ONE INCl-1 ON
OR!GlWl.LtlRAWNG.
0-1·
1 6102 REMOVED EXCAVATION DEPTHS ff' ACD lfNO!ONEINCHON 1HI$ SKEET, ADJUST
NO. DATE REVlSION SY AP SCALES ACCOOOINGl Y
CH2MHILL
·Cal Spray Site
135 Walker Street
Watsonville, California EXCAVATION AND REMOVAL PLAN
FILENAME: 3U245G02J1gn PW T OA TE: 1 S.JUN-2002
C-2
fEB2002
A ::J
x
i:'l
:::!
!!!;;
ii'!S
!i;O w;:'
"'lil
ii!"' z'i' WO
z
-i§
.,,.
:iio
-ill
'":ii
>-U
I
I

//
0 20 40 00
,...._.._ !
L
I,
L
I
I l NOTES:

GRATES ANO DRAINS REW FIT TO MATCH GATE
ANO DOORWAY WIDlHS..

I 2:.. AREAS RESTORED TO APPR0xtw.TE PRE-CONSTRUCTION • GRADE$; WTH COMPLETE DRAINAGE TO EX!STING - CURB AHO Gl1TTER SYSTEM.
• 3. 'FJLLMATERIALPL\CCO lttMAXIMUM 8-INCH LOOSE LIFTS
I , ANDCOMPACTEDTONOT1.£$$1W\N90PERCEHT Ra..A1lV'E M<;)()lAED PROC'tM (ASTM 1557) COMPAC.110N TEST. IN IJPF'ffil FeT All. COMPACTED TO HO 95- PERCENT COMPACTION. AGGREGATE
BASE MATERW.. COMPACTED TO NO LESS THAN 95 PERCE;NT
RELATM.:. COMPACTION.
0 D RITZMAN
SLEOHG
CHR C.GORE
APV0" A OEMOREST NO.IDAl"E """""°"
r-----·- ··--1
•I
/•
;
/
I
I
/
/
DErAILffi"-., - - -
Sff'r7 '(
I
I
4"01Mt PVC SCH iOO --......q,
DRAtNPJPE t
I
I I
I
I
I
\ . ·-----· /I I / -
'
GRATEATEl- 24.3' l
GRA1'EOETAH..5)NOTE1 I\
(SEEOFWNAGii: I
;. t_.. \
I I :=:.:. I CH2MWILL
BY
Cal Spray Site
135 Walker Street
Watsonville, California

CHEVRON CAL SPAAY PROJEC
GRADING AND BACKFILLPlAN
fjt..ENAM£: 36245e01.dgo Pt.OT DATE: 2$.FEB-2002:
""
... ,..,
§
l5
wr
!fc> ;;ti
lili"
ijZ
ii
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Jilo
!l"' ..,.,
;Ei!
1z-!!1

J
I
I.

I.

I.

I
I
NOT£S:
/ /
Scaleln FGe€

1. GATEANDOOORWAYWIOlHSAHOLOCAllONSARE
APPROXIMATE. FlELDVERlFY ANO AT GRATES ANO
DRAINS TO MATCH GATE AND DOORWAY wonts.

2.. MINtMUM 3 FEET Cl.EAAANCE AROUND EXISTING
El.ECTIRCAL PAN.a. BOX.
a EXISTING RADESMAINTAJNEOAROUNDUTHJT"( BOXES.
4, Flet.DFITPAVEMENT AHO GUTTER TOORAIN AROIJNO
INSIDE CORNER OF ltiE OFFSET RETAINING WALL
RECORD

DRAWING
' ' I /I I
, I l I l ·1 I ' --f - \r
i f ih i - - / --J
J 1 I J ; I
I J t Ml--- I l ! ii '"'
jl l 11 I ) #I il' 4: ...,. I 'j +H -- J '
I ' "[
11' ! ' I I I I .i
' 1
If
j i -
11 f
11 I
I 1· I ! j
J t I ! ,.......

I! 1 i
11 l .
:iiy
j, I i
TYPE'A" fff! j j!
[l
/
/
/
/
/
.F /
/
/
/
/
/
/
/
'""
RETAIN11Vt · r ,
I 1 I "'I lL I I 1 ' R' / '
__ _!=-:':._' 5 " c-I l I I i 4--m

VERIFY SCALE
IJARISONEINC*tOH
ONGIL'IALDRA'MNG..
11-1·
c GORE I I l ..... ""''
'ST .. OATE RE\/1S!ON 8Y
CH2MHILL
Cal Spray Site
135 Walker Street
Watsonllille, Cafiromia
t

CHEVRON CAL SPRAY PROJECT

ASPHALT PAVING PLAN
Al...ENAME: Pt.OT DAlE! 28-ff:S4002
stiEET
llWG C-<
OAlE FB2002
Pf«>J 1W45:02.ED
PLOT TIME: 15;49'.25
A::!
"
1; "
I
!;<
"• i :c: ;i,:
l!i
i
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l!S •«
"'
I
g
1;
I

I
i:

I
/
/
0 20 «l 60
,......._ I
..,., ......

I " LEGEND:
- CHAINUNKFENCE
(SEE DETAIL 8) ON SHEET 9
I CHAINUNKFENCEWlnlPRIVACYSlATS
- (SEE DE'rAIL8) OH SliEET 9
r
J
I
I I
f.AOlES:

1. ALL NEW FENC1NG 6 FEETHIGH ACCEPT
AS NOTED. '* i ltJ
RECORD

DRAVVING
.__ 0 RlTZMAN I A 17/30I011
/
/
/
/
\
/
/,.
/
------
VERIFY SCALI::

OftlGIHAl.PRAVN«t
I APVD """"" .. mmm·-no.DATE I I I REVISION I BY Fr«>T<>H><OO ·-" /
/
/
//
/ '

25.5--
.,.:..'&- - --
CH2MHILL
Gal Spray Site
135 Walker Street
Watsonville, California
BEGINNl!W
CliAll<UHK
FEHCE (CONNECT TO EXISTING}

CHEVRON CAL SPRAY PROJECT

FENCING PLAN
PLOTOATE:

SHEET
""" C-S
PATE FEB2002
PROJ 136245.0;tEO
PLOTTIME;
8 ..
15 *Si
::;!';
fl!:
·• t-o
'jg
!
ii
01;) 'iz
.,iij
0 i
§
:!;

[
I,
[
[
I'
r
I.

I
UMIT OF OESIGNAlCO
EXCAVATION: AREA
DETAIL Cf\
EXCAVATIONS UP TO C-2
4FEETDEE.P
HTS

LIMIT OF OESIGAATED

EXCAVATION AREA
DETAIL ffi
EXCAVATIONS GREATER THAN C-4
4fEETOEEP
NTS
RECORD

DRAWING
NO. I OATE

EXISTING GROUND SURFACE

OR BOTTOM OF ADJACENT

EXCAVATION

REVISION

ASPHALT CONCRETE

PAVEMENT SECTION
(DETAIL7J

AGGREGATE BASE
{95% MINIMUM

COMPACTION)
4"PVCP:IPE
SCH SO
"
/
MIN
..

SECTION
PVC ORAl!ltAGE PIPE
TRENCH AND BAQ(flU
NTS
FLOW
liREcTION
EUlOW
DETAIL ffi
PVC OOA1NAGE PlPE C-3
ELBOW
NTS

VERIFY SCALE
llWl; ts ONE INCH OM --"""'-
0-1"
lfNOTOHEINCl'IOM
n.s SIEEJ. ADJUST I BY IAPVDI SCMJ!$AOCMDIHGLY.
!
... I
IA\
DETAIL (4\
PVC DRAINAGE PIPE C-3
WfE CONNECTION
NTS
CH2MHILL
FLOW
$" , 6" , VARIES VARIES
.-.
:>.

I

PLAN VIEW

FRAME ANO GRATE
CHRISTV¥04MINIMUM ORAPPRO:Vii::tlEQUA!.
6': .2" .

PA\'EMENT t

SECTION- I
-- •.

SU!!GRAIJE L__ ----1-----" •
6"x6"'x#10VNYFOR
#4AT6"EACH DIRECTION
SEGTION5-A
OiRECiiON l_. DRAINAGE PIPE TRENCH
(OETlllLS.SECTIONJ\i SECDON 5-B
..-..
_, _ __&.&
114" MIN
1111"MIN +==}:112•MAX
114"MAX 1 I
HTS
NC "'"'''!ENT SECTION

SUOOAAOE
1/4 .. MIN
118"MIN +.=t=1fl"MAX

11.---tMX .r I
NTS
DETAIL (5\
Cal Spray Site
135 Walker Street
Watsonvllle,
"tmAfNAGE GRATE
NTS
w

CHEVRON CAL SPRAY PROJECT

CONSTRUCTION DETAILS
Fll.ENAME: -3(12.ot.SCql..dgn Pt.OT DATE: -- 2&.f'EB-2002 SHS!T
"""' c.e
DATE FEB 2002
PRO.I 1:1tl2<S.OUD
Pt.OTllME: 1S:04::l5
A::!
x
I
i5
51' '1!< I :ilw
I
!2ffi
m5
'?z
si:;
,;"'
;=,_,
!
0 I
0

I
--1
j
I
I
ri:1
IHCURB

CROSS SECTION
IM3.llED v.lRE
Fo
FABRIC lff st0EWALK. 3&"MJN
\llJIDIB.
-fLOWUNEOF
GUTTER

QWNUNK F'ENCE POST
R:EstORE ORIGINAL
FENCEUNE (SEE OETAQ.. 8)
ffiW ALL ELEVATION
• NTS
SECTION flt\
{DETAILS)

LONGITUDINAL SECTION
CM. TAANS DETAIL
PERMfrNO. 0501.&lMJl596 CURB OMN

LOCUST STREET
NTS
RECORD
DRAWING 0$GND RfT2MAN

OR AWONG
CHK C.GORE
AP\1) A DEMOREST ""-
(6\
C-3
SEENOTE5
DETAIL 17\
ASPHALT CONCRETE <ACl C-4

PAVEMENT SECTION
NTS
REV!StoN BY
WALL WITH C-3
6"
R=112"
..L_AAIES
AfC

PAVEMENT

SECTION
(DETAJL7)
SEE'.NOTE4
2" CLEAA I I ,,,
(TYi')
VNl1£S

SECTION
(2'£NLARGED PARTIAL ELEVATION
6"
MIN
- NTS

CHAJNUNK FENCE POST
RESTORE Al.ONG ORIGINAL
FENCEUNE (SEE DETAIL 8)
h
"'

EXISTING
GROUND
{(;\
lillm!;.

1. SAWCU'i"S<fSTIHGCURe, GUTTER AND SIOEWALKOUTFROM
SCORE TO 5coru:: lff DRAIN PIM; 1HROUGH\NAY SAME lN A M6NoUrntC

MANNER PERPERMIT

2. FORM NEW SO£WAt.K, ctlRB,AND GOTTER TO MATCH EXISTING.

3. NO PIPE OR DUCT JOIITTSSHALLOEMADEWTlilN nlE CURB OR $IOE WAlK.

4..

5. Gl«>UNOMATERIAL.

RET AINliC WALL WITHOUT C-3

VERIFY SCALE
llAAJSONEIHOHON
"""""""""""" ._ .. tF HOT OHE tHCH ON THIS SHEET. AO.JtJSf SCALESACCOR!lfNGlV.

FENCE
NTS
CH2MHILL
Cal Spray Site
135 Wall<ei; Street
Watsoo111lle, Califomia

CHEVRON CAL SPRAY PROJECT

CONSTRUCTION DETAILS
Pt.OTOAlE:
8 0
:OS
!fa
,.o .;]
11 I;
StiJ;
I
2'3
>;i!: mo
o!
I
c_d
gj
o;c
i!'u
§
i
0

Appendix B
Concrete Inspection Records

I
I
I
l
I
'
GATCl'OST
FENCE GATC NOMINAJ.

HEIGHT
UPTHRU
-- ID
_,_____
PERF®T
--
.. 21/Z' 4.!)$
OVERS' .. 10.79 THRU12'
.. ANO
LESS OVER12' .. 14"2 THRU18'.

OVER18'
... TilUMAX 18.97
UPTHRU 3• 1 ...
ovau• "
1l1RU 12' ..

OVER OVER 12'
.. nR.118' .. 18.97
OVER18'
T024'MAX .. .....
---- --
ABOVE f'OSTDIMEHSlONS ANO MASSES ME. MtNIMUMS.
l.ARGER SIZE.SMAY BE USED ON APPROVAL Of 11-IE

ENGINEER
PA\lt:MENTTERMINATIOOAT E"XfSTING BUILDING
NTS
#
UNEPOb'T

UNEPOSTS
FENCE

HEIGHT H
.. 1112" I 11113"x11Wl 111rx1 "8" &LESS
0\IER6'

FACE OF EXISTING

STRUCTIJRE

AC PAVEMENT

SECTION
(OETAIL1)
112"EXPANStOffBOLTS

OC PRESSURE
TREATED.ilx6

EXISTING GROUND

SHEET METAL

FLASHING
,, I 21,.""" I
l ...
•'-2lll4@$'0C I
1·112"' srHUCTURAL Pll""'°O
I
I
I
I
SURFACE;.,, ct.ASS ft AGGREGATE
31!1:;'!1111 I -- ""..cr·..-1
1115: MIN
SECTION tD\
C-4
II RE.CORO DRAWING REMOVED BARBEO WIRE. ADDEO NOTE A800T PRJVACY st.ATS !
HO. I DATE RE'MION BY
811.RISotteiNCHON
--·-
...

IF NOT OHE tNCM Ott
BRACE INSTAU..EO & LEFT
IN AT AU CORNERS.

LINE POSTS AT 100(7MAXIMUM1NTERVAL$
BRACED ANDTRUS$ED IN BOnl OlRECilONS
EXcePTrnATTH!S BRAQNGANO
TRUSSING MAY BE OMITTB>YMEN THE
FABRIC IS $1'RETCHED BY THE EQUIPMENT
TYPtCALMEMBER OlMENSIONS (SEE NOTES)
NOTI!S
OlA.GONAL BAACS OR HORIZONTAL
SRACEWlli

TRUSS ROOS

1. 'THETYPiCAL MEMBER DIMEHSIONS TABtE SHOVVS EXAMPLES OF POST AHO BRACE SECTIONS WilCH MAY COMPLY Wini 'flJ£ SPECIACATIONS.

END, LATCH & CORNER POSTS BRACES

2.. SECTIONS SHOWN lN nE TABLES MUST AJ.SOCOMPLY WITH lME SlRENGlli REOUlREMENTS AND OTHER PRO\llSIONS Of THE SPECIACAnota
ROU.fORMED "",',;"°I H I ROlLFORMEO Ill " , .. 3. OTHBt SECTIONS VllttfCH COMPLY'fVllli THE STREHGTH REOUlREMENrSANO OTHER PROVISIONS OF THE SPECIF1CA-TIONSMAY BE U$En OH APPROVAL OF TIEENGJNEER.

T 13112"'3112" I 2"><1314" 1114" I 1112"x1 SM'" I 15/8"x1114'"I t314"x11u .. "'· OPTIONS EXER:ClSED SHAU. ee UNIFORM ON Alf( ONE PROJECT. 2wl•11r>:1112" j 21rr.:a1rr 11/4" I 1112"X1.,..,. i """"111•·l 131...,.,.. 5. DIMENS10H$ SHO'M'iARE HC'.!MtNAL "'
DETAIL {[\

CHAIN LINK FENCE WITH BARSEO WRE OPTION'
NTS
SEENOTE8

6. REMOVE AND REPLACE EXfSTIHG (SEE FENCING Pl.AH. SHEETS).

7. /lPPlYTACKCOA.TBETWEENPl)"W)OQAtIDPAVEMENTSECllOHANDFl.ASHtNGANO PAVEMENTSECTI<'l!t

8. APPt.YTACKCOATBSWEEHOOSTINGCONc:ReTEANOPAVEMENTSECTION.

9. AU. FENaNG N..ONG Rl\IERSID£ANO LOCUST STREETS TO lNCLUOE SRO'INN PVC PRiVACY &ATS.

EXlS11NG { z MTS ' I ACPAVEMEHl' [ EXIS1100 OROlJNO
-
: I EXCAYATIEEXlST.PAVEMa!TAND

PVC DRAINAGE PIPE
ANDlRENCH
(SEE SECT!Off Al
SUOO:RADE TO AMiNIMUM OF
11wBEtOWflNAl.GRAOE

SECTION

ASPHALT/CONCRETE JOINT HID RAMP
ms

CHEVRON CAL SPRAY PROJECT
CH2MHILL
Cal Spray Site
135 Walker Slteet
Watsonville, California CONSTRUCTION DETAILS
c-e
FEB2002
136:Z4S.OZ.ED
FU.ENAME: 36245CQ9.DGN.dgl\ Pl.OT DATE; 28-f TIME: 15:36:53 g
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Corporate Offices
Materials Laboratory
415 Fairchild Drive
Mountain View, California 94043-2216
Telephone: (650) %7-6982
Facsimile: (650) %7-6955
REPORT TO: Jeff Deakin
DCI
DYNAMIC CONSULTANTS, INC.

Testin &: Ins ection Services

COMPRESSION TEST REPORT
September 20, 2001/7-days
October 11, 2001/28-days
DCI No.:

Branch Office
34 Hangar Way
Watsonville, California 95076-243
Telephone: (831) 724-2234
Facsimile: (831) 724-9166
D C M Construction & Services, Inc.
7172 Regional Street #139
PERMIT NO.:
6807-WOl
EOl--00228
Dublin, California 94568
PROJECT: CHEVl\ON CAL-SPRAY PROJECT
135 Walker A venue, Watsonville, CA
Sampling Location: Retaining wall at Dixon Tire
!aterial:

Supplier:
· !ix Design:
ement Factor, sk/cy:

Max. Size Aggr., in.:
! ~ixture(s):
~Strength, psi:

Concrete Cylinders
Las Animas
LA70930
7 sacks
1"
WRDA
4,000 @ 28 days
)pecimen Oient's Date
No. ID Tested
W1116 A 09/20/01
1116 B 10/11/01
1116 c 10/11/01
• CH2M Hill ICC I I Cecil Gore,. : City of Watsonville
Dependability . • • . Credibility . . . . Integrity
Age,
~
7 28
28 Date Cast (ASTM 01):

Date Received:

Sampled By (ASTM 072):

Truck NoJLoad No.:

Tag No.:
9/13/01
9/14/01
Stephenson, H.
72 / l
148551
Slump, in. (ASTM 043): 3
Mix Temp., °F (ASTM 0064): 7 6
Ambient Temp., 0f: 66
Air Content, % (ASTM C173/C231):

Fresh Unit Wt., pd (ASTM Cl38):

Compression Test Data (ASTM 09)
Nominal Compressive
Dimensions, Area, Ultimate Load. Stren~h, Tested
in. ~.in. lbs. e!• Fracture By
6 x 12 28.26 127,000 4,490 Normal JM
6x12 28.26 155,000 5,480 Normal HS
6x12 28.26 152,000 5,380 Normal HS
Average compressive strength (psi) at 28 days: 5,430
All samples designated HOLD will be kept 14 days after the 28 day test and thereafter discarded wtless instructed otherwise.

Any samples held beyond these 14 days are subject to storage fees.

Respectfully submitted,
DYNAMIC CONSUL TA INC •
Ifs the foundation of quality assurance for your project. At CCI, we built it into our name.

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.......... ~ct 1~1;;r1Nlri::;1 DYNAl"'IC CONSULTANTS, INC. Reinforcing Inspection • DCl NO.: PROJECT: ~ 644-0(_~ DATE: <j,'>-/f),-Q/ TIME ARRIVED: /: ~$ TIME LEfT: ~\! 1''2°. TRAVEL:l~TOTAL,TIME: -- MILES TO JOB: "9 TOLL: <J5 PARKING: C LUNCH: -"fl-'"---

PREIJMINABX
GENERAL CONTRACTOR: _,,_..J)"" .... ~ .a..L,.:;-K._ .. c.nz.~c;......,c:::..------­ REBAR PLCMT. CONTRACTOR: ---"----------
SUPPLIER: -----------
PLANNED POUR DATE: 9-h3 - 0/
YES NO ~ YES NO YES~O
( I ( J ~CHECKED lvl [ J
/ CAST-IN-PLACE CONCRETE (0309)
__ POST-TENSIONED CONCRETE (0404>
GEN. NOTES CHECKED I 'V(' l I APPR. PLAN SHEETS CHECKED ---TILT..LJP PANELS (0402.) PRECAST CONCRETE (0402)
--- SHOTCRETE (0310) OTHER (0104/0204) --
LINE TO , ROW TO , LEVEL --- DIMENSIONS CHECKED?~

2. MEMBER ihx,tJ 'C4t... q1.,, J;g ei,,...,,,ra1oc ~,, f..}¢1 $i.IL. "Ally LINE TOq,:Y"~ .. ~~~~ ,LEVEL DIMENSIONSCHECKED?~

3. MEMBER
---------------------~~-~-~-----~------~------------
TO ---, ROW ---TO ---, LEVEL--- DIMENSIONS CHECKED? -- JI LINE--

4. MEMBER ~----------~------~---------~------~----~----------~------ LI NE TO ---, ROW ---TO ___ , LEVEL __ _ DIMENSIONS CHECKED? _ _._ Continued on reverse? YEs 0 NoO
REBAR GRADES SPECIFIED? NQ??4..? GRADES COMPLY? la Q CHECKED SIZES? Y(<'< CHECKED SPACING? ~l,t-< CHECKED LAPS? !)'c·h CHECKED RADII? µ,.N CHECKED POSITION? ~,,L,, CHECKED CLEARANCE? ~CP CHECKED ANCHOR DOLTS? N/f\ CONTINlrrrY PREVrou#._ ... o ... · ""a<...,___ CONTINUITY ruWRE? __,_o.l.jJl-l:\1.---- Work Im · ~°"1pleted c::J lo pregre$s· this date •• DOES. CJ DOES NOT meet thereqtJirements of:
·. Bl Ap~O'Ve(f Pfans (stamped by Code ·Enforcement Agency).. Project Drawings (stamped by Structural Engineer) .. •· Pr'c~ect speciftcations D Engineer's Approved Revision/Change Order ·. ,-. co:ieSIStandatdS D attached CJ reqOested I• UBC _ (Year) D Unapproved Re'Vision/Change Order C::J Title 24 CJ attached D requested .
(::J AWS __.--(Code/Year) c:J Shop Drawings c:J approved 0 unapproved (::J Other 0 Other
Continued on Reverse: Yes D No•
Rev94110t
INSPECTOR:

SPECI!t INSPECTION RECORD
e
I inspection Agency: /}>wAAtt<:.

I JI- .I II . - ,
Job Address: /iQ 'll*D:a SQUT ,- .

Building Pennit No.: JC L- ±
When attached to the job inspection rec:; d, this card
becomes a part of the inspection record.

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NOTE: Each special inspector shall complete for each day's inspection. Post this card adjacent to building permit irlspection record card. Weekly reports to be submitted by each special inspector/inspection agency to the building department. j I

I TIME I
INSPECTION TYPE INSPECTOR NOTES I IDNO. DATE START END
-:..-- A ,; l t:·?>o 3:00
...... . • ·-- ..o-: .• A )]' -
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1 (P:\admln\l'orm:sYnlscbldg\speclnsp • ..,) August 10, 1999 (10:4:31111) lib Page 5of5 Page 677 of 1256 P.O. NUMBER
ARRIVE.JOB ·
START UNLOADING :.

FINISH UNLOADING
.· ARRIVE PLANT

TOTAL TIME

)Cl 1i"fr=1-rr-i~ DYN.~MIC CONSULTANTS, INC. Concrete Placement Inspectio1 DCIN·~Q-:------------PR_OJ_E_CT_:~C-:::"1"-D--~--/\..---::C~--:-~S'~~~.a...~~:,;:.;:;.:,:::.;:.:::,:,:.:.:.:.:~~::.:;:,:

DATE: 7 ( ]-f'.3 ..,.ME ARRIVED: /{)tr / 2 I/,/ - 1
4 -- \ TIME LEFr: TRAVEL: t '1 TOT AL TIME: --
MILES TO JOB: 7 1 TOLL: ---- PARKING: LUN<;ff
GENERAL CONTRACTOR: UC f!l SUPPLIER: AS-fa<- !<to:/k..,,- 1

YES NO PRELIMINARY
l~i { J ·SPECSICHECKED f ( ( I GEN. 11-lOTES CHECKED
r r l l FORMS CLEANED
[ . ( J REBAR BRACED, CLEAN, CLEAR
l ( J FORM$ WET
( "'i-J 1 SANDPAMPENED
f ......... I J DIMENSIONS OF MEMBERS VERIFIED
Numb4!r of Vibrators on lliand: / Number of Placing Crew; < DISCRIWANCIES FROM. PRELIMINARY CORRECTED BEFORE COVERED? If not, explain:

YES
f I
I I
:~
:fi
NO
I~ I I
I J
( I
lfl
P0RTs NECESSARY

PORTS PROVIDED

POUR JOINT'S READY

DOWELS/BOLTS READY
l<EYW A YS READY

REBAR CONTINUITY
All above ready before placement? ~
Y:"'r
l +. i<'..~f v(_ PLACEMENT ~ '../'L le>J g.... -'•--:ft ......... ~ .. ~~~~,__~-. ......... ""''-~-----, LINE TO TO -- ________ _.. _______ ,LINE TO TO --, LEVEL __ ---·----_.. _______ ,LINE TO , ROW TO __ , LEVEL __
---·------------.LINE TO ,ROW TO ,LEVEL __
Continued on rev=? '!es 0 . No~ I le. r
( MJX NO.: L.J\ _t_OCfle_ CEMENT: L~·~ AGGR.: PIGMENT: _o_~_~_,,7...__ ____ _ COMPR. STRENGTH t/b.1u p;i cumc YARDS PLACED TODA y _r __ --:~~-- TIME OF INITIAL PL MENT U00 TJMEFIRSTTRUCKBAJCHED . /Q (""(' PUMPMlX?....._~..._ __ WORKABILITY CONSOLIDATION NORMAL? 0 ~ REI FQl{CINC DISTURBED?: ....... .....,...,..,..,,,.__ SET NORMAL? POUR COMPLETED TO PLANNED POUR JOINTS? ?-'r TIME COMPLETED iJ?O EIELll IESIS
TIME:

TEMP/TEMP
CCONC/ A MB); :3 l ~(;; SLUMP:

AIR: - NO.CYLS.: :1
OTHER: - Wark 1:1 completed CJ in progress this date - DOES c::::J DOES NOT meet the requirements of:

I
. App.. ro.ve • d Pl. ans. (stampe. d by Code Enforcement Agency)•. · Project ~awings (stamp7~ by .s. t.· ructuraf Engineer) Pr~lci: specificaticins c::J Engineer s Approved Revision/Change Order ec&tS/Standards · ·· .. J_ · D attached D requested
· B! USC 0:: _ (Year) 0 Unapproved Revision/Change Order l Title ~. : D attached D requested
· · AWS~- (Code/Year) Shop Drawings D approved c:J unapproved l Other Other
,temarks on Ruverse: Y cs D No 0
Rev9'1l0t INSPHcrOR:

•AV
~ •W
'·i---.. ,,,._'"._
. ··~·~< ~ ... IRRtr.'
ATTEHTION. ·
,!} ~ ,Cl:IH;J>~A}YtY. l
0 CLL 2. SLOW POUR•OR PUMp

3. TRUCK AHEAO ON JOB

4. CONTRACTOR BROKE DOWN

5. ADOED WATER

6. TRUCK BROKE DOWN

7. ACCIOENT
e. <;_ITAT!ON
,, . \i ;s \ P,aQpERTY,PAM~~~- ~~~EASE-~
f ·"' "(TO i~SIGNErliDEliVi:RvtoeitMhe iNfurlECU.a [INE) +· :<: [;, ~o..a',~, 'riiHfilw o11his truck In j)f&S8l1llnl} 1his REUW>E to you ·!Or your siglll!lure is ~- . · · · · · · · .· posslblyaius•ulamacie~-~
THIS DELIVERY _TICKET HAS BEEN PREPARED BY AN
80 SERIES COMPUTERIZED BATCHING CONTROL.

WITH COMMAND CENTER OPTIONS. .
''. ARRIVE JOB

START UNLOADING

FINISH UNLOADING

ARRIVE PLANT
-·----·--·-·-·-··_.:.__ ___ -~------ ---~· -"-~~·-~-·-·-·-·- -·-- -~

e
SPECIAL INSPECTION RECORD •
Inspection Agency: ./)y#m!J 1'(!
Job Address: $'7/h(LT 1
Building Pennit No.: @/-Ot>..2/191
When attached to the job inspection record dud, this card becomes a part of the inspection record.

I
NOTE: Each special inspector shall complete for each day's inspection. Post this card adjacent to building pennit iJspection record card. Weekly I reports to be submitted by each special inspector/inspection agency to the building department. i TIME
INSPECTION TYPE I INSPECTOR I ID NO. I DA TE I __ , NOTES I I START I END I ...........___ . 'J_J
arft> "\'" ) .. "\ rR.(-.,, M.\ t { Quf'i,Jt I
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(P:\ldmln\fonns\mlscbldg\speclnsp.agr) August 10, 1999(10:4lam)11!1 Page 681 of 1256 Page 5of5 " ~
CH2MHILL
// ,'00111- /,Z ft:?,~~ Ht!.

DATE: o/lvrsJ#I/ 'I- /2-(J/ - DAILY INSPECTOR'S REPORT
• scttEouLE: __;:e;;.,,,.:0;:..L11LL1=tt.:..!.*=c.-I-'--------- PROJECT No: It tJ.81{, Items of Work Completed Location or St.a. to St.a. Amount Remarks £,/14--//
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fO "')\ OC\/ •nttu: Cl"\CHI ..,..,,, Page 682 of 1256
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lil~:-1:-;ri:: Concrete Placement lnspectior
,, ____ ,...: - PROJECT: Cdea~ LJ,6 $<)MA~ .
-..:;..;i-.;...-.... T~ ARRIVED: /() lJ/!5 TIME LEFT: TRA VEL:~AL TIME: -- /{) I TOLL: 9' PARKING: OS WNCH: ¢
/GENERAL CONTRAcrok Q Ua..M HiL/, SUPPLIER: y,,. ,;- /7. .. - ~ .L I" ~A..,- PB.EUMJNAJlY
YFS NO
c J c J --- ::_.:.-Eo N ~ I~ ( J GEN. ~IC5CHECKEO
[ V'f"" [ ) FO~ S CLEANED ( vr- { ).......,.«EBA ll BRACED, CLEAN, CLEAR [ 1 ( vf/FO~ $WET [ • l- ( V'f SANDI DAMPENED
[ v']' [ J OIMEJt.ISIONS OF MEMBERS VERIFIED
Number of Vibrators on Hand: __d_ Number of Placing Crew: "' DISCREPANCIES FRO~ PRELIMfNARY CORRECTED BEFORE COVERED? If not. explain:

YES NO
, [ ] ( \"') PORTS NECESSARY
{ ] [ ~ PORTS PROVIDED
[ ~ [ J POUR JOINTS READY (~ I ) DOWELS/BOLTS READY
r..w ( 1 KEYWA YS READY [ v:y- [ l REBAR CONTINUITY
All above ready before placement? ~
~-~~~--~--~~~~~
[Jo~~@>~~~- ,ROW __ ro __ ,LEVEL#
'' · "' ~Ctd«ti ·~~)lQ'f ... ~_41: .41 ,LEVEL 4
--------+--------I LINE TO ,ROW TO I LBVEL __
--------+--------,LINE TO , ROW TO ~LEVEL--
1" Continued on reverse? hs D No • ,._ .. '
MIX NO.: bAj09~D CEMENT: 7 ... Ocd c AGGR.: I. :Gccntaiii'il!GMENT: ---Al-on~ ... a .... 1~---­ COMPR. STRENGTH l-1f tc¢ psi &ere YARDS PLACED TODAY -----.---- TIME OP INmAL PLAcRMENT t~: / .. '5' TIMBFIRsrTRUCKBATCHED II i /a PUMPMIX? JO IA WORKABILl1Y Of< CONSOLIDATION NORMAL? JiAµ REINFORCING DISTURBED? Alo SETNORMAL? /J.J _, POURCOMPLETEDTOPLANNEDrdimJOINTS? // ... ~ TIMECOMPLETED

FIELD TESTS
TIME: 1.~~~()

TEMP/TEMP
(CONC/ AMR): 1..tS·, {Q>J .. I I I I
SLUMP: ,:J.~4'' AIR:

NO.CYLS.: .::?>
OTHER:

WOO< • complet$t t::J In progress this date • · DOES c:::J ~ NOT meet the requirements of:
• Approvt<t Plans (/itamped by Code Enforcement Agency). PrOjett Orawtngs.(atamped ~Y S~ctt.lrat E~heer) - Project speciflca~ · CJ·.· E.ngtneet's Approved Re···M.·Si··. c:Jn ... ICfia.ng, · e order . • Codes/Standard~ p attached c::J reques~ed - uec . .· ' .· (Year) D U~d RttV15ion/Cha,nge at.der Cl Tide 24 ' . c:::::J . attachidt::J r-eqtJffte<I O AWS (Code/Year} CJ ShOp Orawtng$ D approved CJ unapproved ~'1-.--.....!:'=:!l~ot~h~er:...,.~~""""-::=:-------------.....!:'=···~l~Othe~ .. ~r=:::=========;:;;;;;;:;~t;;;:=;:=:===:.1 Ye111 0 No • /) C"\ /:.. ,.; . -"'A'L-< Rev9't101
Remarks on Reverse: INSPECTOR: A..4 ;;;¥~
--· -----

~
1~1 1-1- ri&il
Reinforcing Inspection
PROJECT: ~ > c:_"f4 ~ .
~~"--""'......._ TIME ARRIVED: /lH Jl/5" TIME LEFT; · TRAVEL: t.5mz::.rnar AL TIME: --- TO JC>B: /(J TOLL: ¢ · PARKING: p{ LUNCH: --vq{....._ __ GENERAL CONTRACTOR: <lifa..M 1'4:&!6
REBAR PLCMT. CONTRACTOR: CJ. C< .. ttlZ .

PRELIMINARY
YES NO AIO'HL> YES NO
( • I { J .sPFCS Cl IEeKED Iv('° I J GEN. NOTES CHECKED SUPPLIER: ~ 1?.MA 1
PLANNEDPOURDATE: 9-fiJ..o -o/
YES NO
l vf° ( I APPR. PLAN SHEETS CHECKED
_L CASf-IN·PLACE CONCRETE (0309)
POST-TENSfONED CONCRETE (0404) --- TILT ·UP PANELS (0402) SHOfCRETE (0310)
PRECAST CONCRETE (0402) -- OTHER (0104/0204) -- --- --
eLAt:EMElfi

1. MEMBER ~f-R"j""t4i@, ,{1¢,on, p;i',, ~Jtc01j?
UNE TO • ROW TO , LEVEL#• DIMENSIONS CHECl(ED? ~ 2. MFMBER/J;Wiur"9"A~·C(Jf««~>;v.., .~ ...u-.

3. LINE TO , ROW 0 , LEVEL#- DfMENSIONS CHECKED?~ MEMBER LINE TO ,ROW 'TO , LEVEL DIMENSIONS CHECKED?
_. 4. MEMBER
LINE TO ,ROW TO , LEVEL DIMENSIONS CHECKED?
Continued on reverse? Yes 0 No8
REBAR GRADES SPECIFIED? t\Jo GRADES COMPLY? "1 0 CHECKED SIZES? . "''' CHECKEDSPACINC? ~< CHECKED LAPS? ~ CHECKED RADII? f<" .. CHECKED POSITION? 1' ,t.J CHECKED CLEARANCE?~ CHECKED ANCHOR BOLTS? AJ J A I
CONTINUITY PREVIOU . Q ~ CONTINUITY RE? olS.
. Wonc •.. compteted c:::J in progress this date - DOES • c:J DOES NOT meet the requirements of:
~· • · ApPf°oved Plans (!Stamped by Code Enforcement Agency)- Project Drawings (stafl"4)ed by Structural Engineer) •.·' Proje.ct speclftcatlons D En. gine. er's .Approved Rev1 ... s1.·on/Cha. nge Order - CodeS/Standards CJ attached D requested - · UBC ____ (Year) 0 Unapproved Revision/Oiange Order
Cl Title 24 D attached Cl requested
D AWS ----(Code/Year) D Shop Drawings CJ approved c:J unapproved c::::J Other CJ Other
Continued on Reverse: Yes 0 No ~
Rev941101 INSPECTOR:

~LL --

DAILY INSPECTOR'S REPORT
DATE: r-26 -0 (
SCHEDULE: __ --1-..-_____ ....,...._.__ PROJECTNO: /6f8z_cJ- • I INSP:

LINE:
< 7;:;JAt ~
Items of Work Completed Location or Sta. to Sta. Amount Remarks '*"'"*'
10 ..,,

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SPECIAL INSPECl10N RECORD i)
Inspection Agency: WAA'Jl't:!
Job UAQ:T
Building Permit No.:

When attached to the job inspection record dud, this card becomes a part of the inspection record. j
-- I
NOTE: Each special inspector shall complete for each day's inspection. Post this card adjacent to building pennit itjspection record card. Weekly reports to be submitted by each special inspector/inspection agency to the building department. I ' TIME
INSPECl10N 1YPE INSPECTOR IDNO. DATE NOTES I ! START END I i- ! -..:ri'-<> l A A 7.Jli:-- - - - '1J - - .....
.... ..... ·--La .. {£:.J. ... _ I: ·?Jo 3:()0
£l n.L. :'"J. i:. c_c;a. c;.. , I ot43'0t-tl l·?.l-oJ ct. , "' "<-' 8':.0l'.) l ... " ---
Cl "' - - - - ..,.IJt!. NA:;.---:: I
c.. .. 't k el"c..t """'"' I- "'VAJ«.-f& ,, ... ) .. ,,\ rf.(..,.,,...., \,..(J. t f I lo3o Sb I . ,.

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(P:\lidntlft\f'onM\Mlscbldg\spednsp.llf) Aaiust tO, 1999 f I0'.411t11l I.ti

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snc!. INSPECl'ION RICORD •
Inspection Agency: Jh#AAT<:

JobAddress:
, Ul£;l:

Building Permit No.: Ft?/-"t>,12'ZI . I
When attached to the job inspection m:otd drd, this card becomes a part of the inspection record.
\
•
NOTE: F.ach special impcctor an complett for each cJay•s inspection. Post this card adjacent to building pennit record card. Weekly . repods to 1'e submitted by each special inspector/inspection agency to the building department. I ! TIME I I
INSPBCTION1YPE INSPECTOR IDNO. DATE NOTES START END
..., ____ A ............ --... ··-..... - _... 3:00 -11"-"'M I -- . . .,, 'l-..:rf-6 l A - • - "1-_ .CS--:. .. ..... /:'30 ,()_ nL. L_ .""JM.
.. c;.m. ,
at!M>,314S-.r' ·-?.1-6/ "' ... "<- 7--o ......-•.- ... Z:P< - "'!"fl"" J 9-ll!C-dJ '';,,.-_ .... - I - - I
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(P:' t 111 ..,.,.....,,_ul ••> .... 10. f'99(1t:4llM) 1• Page 687 of 1256 Pl'Oil' "' ~Cl! l*r=1-1-ri- I
DYNAMIC CONSU ANTS, INC. Concrete Placement Inspection
Number of Vibrators on

DISCREPANCIES FROM
If not. explain:
----TIME LEFT: TRAVEL: TOTAL TIME: ---
PARKING: LUNCH:

PBEUMINA,&X
sUPPLIER: LAc An\.,, r
NO
f ~ l I
I I
All above ready before placement? ~
f4:

WORKABILITY-.-.-..+--- CONSOLIDATION NORMAL? REINFORCING DISTURBED'--._.-- SET NORMAL? 1 POURCOMPLETEDTOPLANNEDPOURJOINTS? TIMECOMPLETED «Ai' TIME:

TEMPnEMP
<CONC/ AMB>:

SLUMP:

AIR:

NO.CYLS.:

OTHER:

HEID TESTS
Work - completed! c::J in progres.s this date l!I DOES c:J DOES NOT meet the requirements of:

I Approve. . . d Plans (s~amped by Code Enforcement Agency)CJ Project Drlwi. ·ngs (stalf1>ed by Structural Engineer) PrO,t.ct speclftcatlclns D Englne•'s Approved Revision/Change· Order Cadoll-r;? Cl -c:i __ od 11!1 use (Year) D ~oved RtWision/Qange Order CJ Title 24 L..J 1ttached CJ requested
CJ AWS (Code/Year} c:::J Shep Drawings c::J approved c::J unapproved CJ Other CJ Other
/..-femarb on Reverse: Yes p No 0 -~941101
INSPECTOR:

4t
CH=Htu DAILY INSPECTOR'S REPORT 0,.... :/:-. t)/ e.,./- . DATE: /" ~ 7 ~&ie~· . ~,Q,t) &l/41'/'f PROJECT NO -~-~"'---rJ-""-f£_v/ ___ _ ~:: ~,~~.

Items of Work Completed Location or Sta. to Sta. Amount Remarks •
• /0 .,, DC\/ 41\/0,i:; Cl"\Dt.• ,,,_,,.~

OCt:!

DATE JOB NAME OR NUMBER
<)81 ~11 / •J l 05 : 5-,. : 03 OCM
WARNING: • CCNCRETI! CONTAINS l'ORTLAND CEMENT. • lfUllTATNJ TO THESKIN ANO EYIS. •AVOID COHTACTWITH EVl!S ANO flRO..

LOHQED CONTACT wmt SKIN..
• WUA RU9Hlt BOOTI AND Gl.OW!S. • II CAii!! OF CONTACT WITH SKiii Oft EVES. =-~s:~~::=t" ATTEHTION.

KEEP CHILDREN AWAY.

PROPERTY DAMAGE RELEASE
(TO ee SIGNED IF DEUVERY TO Be MACE INSIOE CYRii UNel
°""' C-· Tiie-Of.,,.. !rUl::l< lrlp-lllinONJ RELEASE ll>lf"""=' ,_ liG!\1111"' ii of .......... 1111.t ... liffandwoigh!Ofhillruakmoy~ --."' ... __ ..-ldjocen111'-1Ydho~IMmater1&1in,.. __ l""'_,. •. ftlllourI01'tipJO<lln.-,.-dlat•-.Wlno-10dotnlo111t-le~-you11gn tnlil llELEASI! rlli°"""I! llitn ond lA8 ANIMAS :lOliCREl'l! • 8Ull.OIHG SUl'fll.V, INC. from ----litr-.. , ..._ ... ...., ....... to ... _...._ lllljacont ~. -..-d-•.. - .... by ... ~afflli•-.--,... .... -I0""4PhlM._.,,,.d_tlw_olN!l-Mhtttelllllloot-the~ -. Fur1tlet, u - -. !tit ~ - IO incMIM!ljt Ind hold
1111mleu 111t - of ... --~$ AHfl!IA9 COHCAITE • llUl.l>ING SUPPLY. INC lor any and Ill~ 10 IN~ tnllot """*" P!-'Y-INY lie cialM..i by anyono IO - _,...., outaf doiNWy o!lllls Otdlr.

LOT NO.

I. JOB NOT REAOV
a. SLOW POUR OR !'UMP
• 3. TRUCK AHEAO ON JOB
RJVERbliTE

WATSONVILLE
P.O. NUMBER

4. CONTRACTOR BROKE DOWN

5. ADDEO WATER
e. TRUCK BROKE DOWN

1. ACCIDENT
ll. CITATION

8. OTHER

CYLINOEAS TAKEN

CUSIC YARDS
Ut70.~30 ..

FINISH UNLOADING

ARRIVE PLANT

TOTAL TIME
MIX NO. CaCl 2
SUB TD1~li ..

COO N

MINUTES STANDBY TIME
TAG NO. 14 a~ 73
THIS DELIVERY TICKET HAS SEEN PREPARED BY AN 80 SERIES COMPUTERIZED BATCHING CONTROL.

WITH COMMAND CENTER OPTIONS.

TRUCK NO.

HRS. • MIN.
•

TIME ORDERED

DCM

DATE JOB NAME OR NUMBER
08131101 06::3o:Jlt IJCM
WARNING: •CONCRETE CONTAINS PORTLAtlJ CEMENT. • IRRITATtiO 10 THESl<IN .AND EYU. •AVOID CONTACTWllH IYIS AND PR0-

1.0tfQEO CONTACT WITH SKIN.
·WEAR RUIHft llOOISAHOQLOVES. • IH CASE OF CONTACT WITH 8KIN Olll IYU, A.USM THOftOUGHLY WITH WATER. IF IRRITA110N llt!RSIST8, GET M£DICAI..

ATTENTION.
1<£EP CHIU>REN -AY.

PROPERTY DAMAGE RELEASE
(To BE SIGNED IF DEUVEllY ro BE w.DE INIWE CURB U'lel
O..r Cu-· Th._, allhOl l-inP<-nli"ll hi REI.EASE IO 'JOU lo< yOUt ~ OI o1the41!in'°" l!10f the we ..i weight o1 hit""'* mar~..- dool'llllQO to in.,..- - ..... nt p,_ny If ll<t plKM lhe moltn.lin .... loed - yoo.dHir• ~. - • O<lt """" to MIP,... k\ ~way thll! W9 can. but in.., IO do 11"1 lll•-ll ,.qunting lhcl ro<J •Ian 1t1it REI.EASE rell<Mfl9 him - lAS ANIM~ CONCAETE 6 8Ull.DllfQ SUPl'LV, t!«l. - 1111'1 ,.~ llllm any d&tfl&QO hll m.y occur lO lie preml- - ..,.nc .,._iy, ~- ......... .-wo. -· e1e.1ir ... ~ ol llll• m.11r111. - 11\11 l'OU allo ...-1oQoJphim,.......mudilomhwheftotllll-fOIM!lwwllnotbr.,.pijllle 11-. F....,., •·-.ion.I conol-. fie -rtl(lrlod - lo Indemnify and hold """"- N - ol tnhl 11\lCk - LAS ANIMAS CONCllETE 6 !IUll.04NG SIJPPl.V. N::. !or -·nd ___ .. "'·---. ....,..._, _ m11YbecMimod lly- IONl .. -aulol~olhlanlor.

PURCHASER AGREES TO PAY FOR M,lTERIALS LISTED ABOVE WITHIN 30 DAYS FROM DATE. IF COURT ACTION IS INSTITUTED ON THIS ~VOICE, THE PURCHASER Pf'IOMISES TO PAY REASONABLE ATTORNEYS FEES.

LOT NO.

3. TllUCK AHEAD ON J09

RIVERSILIE
W~TSONVIUE
P.O. NUMBER

4. CONTRACTOR BROKE OOWll

5. ADDEO WATER
t. TRUCK 8llOKE DOWN

7. ACCIDENT {
a. CITATION J, I.OTHER L ARRIVE PLANT

DRIVER NAME

TOTAL TIME
CYLINDERS TAKEN MIX NO.
~
TRUCK NO.

HRS. • MIN.
•

TIME ORDERED
CU81CYAROS MAX.SIZE SLUMP
/ 3 'l
LOAD NUMBER YARDS DE!.IVERE

AUTHORIZED
ING SUPPLY, INC. - WEIGHMASTER
,/
av , .. / DEM
SERVICE CHARGE IS COMPUTED BY A "PERIODIC RATE• OF 1 112% PER MONTH WHICH IS AN ANNl P.ERCENTAGE RATE OF 18% ON PAST DUE ACCOUNTS.

SUB 10fflL
COLI N

MINUTES STANDBY TIME
TAG NO. 14 ~f7 7
THIS DELIVERY TICKET HAS BEEN PREPARED BY AN 80 SERIES COMPUTERIZED BATCHING CONTAOt. WITH COMMAND Page 691 of 1256 CENTER OPTIONS. -DCI ~DYNAMIC CONSULTANTS, INC.

I i;l ?ft 1·· r:i· '61
Concrete Placemept Inspection
•
•
OCINO.: PROJECT: ~J C4L .9f'~ . ;
DATE: 2-4/-0£ TIMEARRIVED: <e~::.o TIME LEFT: 2:oo TRAVEL:k5mzf.TarALTIME: --- MILES TO JOB: _....J.~D____ TOLL: __..(X __ _
LJ.c.=nz .. PARKING: $If I UNCH: _.,,.d,--__ GENERAL CONTRACTOR: SUPPLIER: Y,.. 1 /i. - ~,, ;"'>;_ _ .. _.e YES NO
lvf { 1 cvr l 1 ( ."1..-- ( J
(-:r ( )
C J Cl.Id [ta~ [ J
l0' r 1

SPECS CHECKED
GEN. NOTES CHECKED

FORMS CLEANED

REBAR BRACED, CLEAN, CLEAR

FORMS WET

SAND DAMPBNED
PllEIJMJNARY

DIMENSIONS OP MEMBERS VERIFIED
Number of Vibrators on Hand: Q Number of Pladng Crew: AfDISCREPANOF.S FROM PRELIMINARY CORRECTED BEFORE COVERED? If not, explain:

YES
' ( J
[ ]
[vf
c-r [Yf
[\.of'
J
NO ' , ( .vt::- POF TS NECESSARY
( V'1 POF TS PROVIDED
[ 1 00. IR JOINTS READY
I ] 00 !\TBLS/BOLTS READY
[ J K6'WAYSREADY
[ I REEIAR CONTINUITY
AU above ready T placement? ~
i
PLACEMBNT - _,-;,~ ' ' ...-- .,. . 44 ~~AiP~4'&_. LJA_ '-T;"e ·A ,tuv.auu~ "rtU'L p;UN£ TO , ROW --TO I ,LEVEL --------------• UNE . TO ,ROW --TO , LEVEL
--------------,UNE TO ,ROW --TO ,LEVEL
--------------, UNE --TO --,ROW --TO ~LEVEL
Continued on reverse? Yes D No. -. JI 1
MIX NO.: &=A709so CEMENT: 7.D.J. AGGR.: I PIGMENT: · ,"-'bnJ?,) COMPR. STRENGTH !i'OCX) 'f;i CUBIC YARDS PLACED TODA y( -./_.&-1_...,...,....._ __ TIME OF INITIAL PLACEMENT /,;a :o TIME FIRSf TRUCK BATCHED b !. /Q ~ P~IM;-MIX? AJ/A WORKABILITY 6)<. CONSOLIDATION NORMAL? ~..rk REINFORCING Dfuim.BBD7 NO SETNORMAL? //.~ POURCOMPLETBDTOPLANNED.J'URJOINTS? .l~111 L . TIME ::oMPLETED J ::¥6 TIME:

TEMP/TEMP
(CONC/ AMB):

SLUMP:

AIR:

FIEJ.DTESIS
I I I
NO.CYLS.: _ _..:!a_· -----------------+- ----- arHER:

Wottc - tompfeted Cl In progress this date .. DOES Cl DOES NOf meet the requi~ments of:
• Approved Plans (stamped by Code Enforcement Agency). ProJett Otavvfngs (stamp !d by Structural Engineer) -
- PrOjeet spettflcatl0n9 CJ Engineer's Approv(!(f R"' slon/Chihge Order 1 C~/Standards . . D . attRht<:I Cl rt ~id .. ·. · t
~ ~~ 4 (Year) CJ uc:r:: .. · atta!:f~C::=~~ CJ AWS .. . (COde/Year) 0 Shop Drawings D II proved D unapproved CJ Other . D Other · ..

Remarks on Reverse:

Rn-941101
Yes 0 No.
- INSPECTOR: .Jj_~ 1 - ~

--...... CH2MHILL DAILY INSPECTOR'S REPORT
SCHEDULE: PROJECT NO: ~-------------
LINE: AJ'ZR~
INSP: £...L~
Location or Sta. to Sta. Amount Remarks
1--------------+--------1-----,----+-------...-t"'
l#§Hilli•
/0 .,, Page 693 of 1256
RECORD • .,
Inspection Agency: /)yA/MR:

Job Address: µf v.l#a .$'LQ;r
Building Permit No.: £(}/-l'Jo,/fil
When attached to the job inspection record J.nt, this card becomes a part of the inspection record.

NOTE: F.lch specill inspector shtJI complete for each dayts inspection. Post this card adjacent to building pennit record card. Weekly -
..... to be submitted b1 each special inspector/inspection agency to the building department. I ! TIME I
INSPECTION 1YPB INSPECTOR IDNO. DATE NOTES START END
,,_ ...,._
- A ... ,._ - - - .I"' !-.:lf-6 l );. /:?Jo 3:0() ""' _-. -- "°... IE!J!- A)_ aL L :"J-L. ... «;. ... o- , 1-"Al-o/ 4:. ... "<... f':.OC .. ,..
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~ Page 695 of 1256
CH2MHILL
.......
-

DAILY INSPECTOR'S REPORT
DATE: ~ j7-t?/ -~-=--~----
SCHEDULE: _c:t. __~£----;,,,,, __ %_~-----~-"--- PROJECT NO: _..._./6' ..... ·...::;..~-~----=----- .. .11~~ -u~
Items of Work Completed Location or Sta. to Sta. Amount Remarks Uef~.f.-.....~ ~/ HI! /Id. IL_ ;>-1 ...... ~ 7':1. cf'~' rAfl, ·/ " . '
/hi# ~ <' ~IArL- JJ, I "M A/~A' y ~ . ,
{<ef t~ J'1 :f:f 1 J if"! AJ "·I././ ?l 2 '% /,tt.F/ed' - fl-: o/5 /c, ,..<=- :A,,."~ hffe- 1 _/. ,
i re,t?v-d ,,
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•
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•• 10 ")\ Page 696 of 1256
CH2MHIU.
.....
-

DAILY INSPECTOR'S REPORT
DATE: ____.Z=..__-.__/-~--P_/ __ _ (. SCHEDULE: ----------=---- PROJECT NO: ~/'.-~-~-=~-'--;,._71''------ LINE: dce1~ d/{!de,-r,
INSP:

Items of Work Completed Location or Sta. to Sta. Amount Remarks •
Mtl§·IE"tf.•
• /0 ')\

~EIGHMASTE~CERTIFICATE • . ·ng commodity was we91ed, measured. !>r counted by a weighmaster, whoSe signature is on this certificate, whO is a recogruzed by Chapter 7 (commencing with Sec!Klll 12700) of DM~ion 5 of me Calilomi!l Busifi!!ss and Professions Code, administered by the Division of rds ot the Calfforrua Department of Food and Agriculture. ' · ANTACRUZ SOLO A A ;~A-A#4~4 P. "'i!~M~: ev .-.;aa nHUlul4 t~.._,.., '1t 146~NAL ~(~;/,,,/;,~,,.
~ fd_j~-L.,I,,,~, 'JIU!-" ~:.---------------------- 1)ELIVERTO RIVERSIDE & Wt.iLKE:R
DATE
OCZ/07/()i O~i~53i37

JOB NAME OR NUMBER
!">CPI 0
LOT NO. P.O. NUMBER TRUCK NO.
75 WARNING: •CONCRETE CONTAINS PORTLAN> CEMENT.
• IRRITAmG TO THESKIN ANO EYES.
•AVOID CONTACT WITH EY&I AND PROLONGED CONTACT WITH SKIN. •WEAR RUBBER BOOTS ANO GLOVES.
•IN CASE OF CONTACT WITH SKf,I OR EYES,
FLUSH THOROUGHLY WITH WATER. IF

IRRITATION PERSISTS, GET MEDICAL
ATTENTION.

KEEP CHILDREN lt,WAY.

PROPERTY DAMAGE RELEASE
(TO BE SIGNED IF DELIVERYTO BE MADE INSIDE CURB LINE)
Dear Customer • The driver ol 1111s tru<:i< in presenting this RELEASE to you for Yeu< slgnatufe is of the opinion that the size and weight of his truck may poss1bty cause damage to the premises and/or acfiacent property if he•plaees 111e material in lhis load where you desire tt. h is oor wish 19'.holi> you in every way that we can, but in order to do lhis tile driver is requesting !hat you ~ ·mis RELEASE reMeving him and LAS ANIMAS CONCRETE & BUILDING SUPPLY, INC. lr<im any re-lbility from any damage that may occur to the premises and/or adjacent property, buildings, sidewalk, driveways, CUlbs, etc. by the detivery of this material, and lhat you also agree lo help him remove mud from tile wheels of his vehicle so that he will no! litter the public street. Furtller. as Odditional consideration, 111• undet<igned agrees to indemnify and !>old hamlless the driver of this tru<:i< and LAS ANIMAS CONCRETE & BUILDING SUPPLY, INC. for any and all damage to the premises l!fldlor a.ija<:eot property which may be claimed by anyone to have arisen out of defive;y of this ordel".

SIGNED

3. TRUCK AHEAD ON JOB

4. CONTRACTOR BROKE.DOWN

5. ADDED WATER

6. TRUCK BROKE DOWN

7. ACCIDENT
$,CITATION

9.0THER

ARRIVE PLANT

TOTAL TIME
MIX NO. CaCL2 Fi 00!)25 Ci - 25
SACKS MAX. SIZE

LOAD NUMBER
01 HRS. • MIN,
•

TIME ORDERED

YARDS DELIVERED
0(1(~. (i(i
,,OTtCE MY SIGNATURE BELOW INDICATES THAT I HAVE READ THE ABOVE HEALT]:! WARNING NOTICE LAS ANIMAS CONCRETE WILL NOT BE ~LE

FOR ANY DAMAGE CAUSED WHEN DELIVERING INSIDE CURB LINE

AUTHORIZED BY
LOAD RECavEo BY
x
BATCH NO.

W..1T TRIM
Ot

02. (}
01/02
BATCH
~102
BAX CH
ABf.1 ()Ji.

AOO OZ
CEPI 01
WA'f (>1
AXB 02
BSZ
t-.10.

BSZ

4.50 01

4.50 NO. 02
15Lt80 LB
1314<J LB
5928 LB
191 SL
233 oz
TIME
END
AGG

CEM WAT
AXA
AXB
AXC
AXO
(j~h5~ t. 19
rnHES
00 LB
-04 LB
00 GL
00 oz
00 oz
00 01
C>.O GL
MC
MC
LO

5.0 GALS.

SERVICE CHARGE IS COMPUTED BY A "PERIODIC RATE" OF 1 1/2% PER MONTH WHICH IS AN PERCENTAGE RATE OF 18%, ON PAST DUE ACCOUNTS.

QUANTITY i UNIT PRODUCT DESCRllHION I PRICE 1 AMOUNT ' I

9.00 l.A7')<)30
COD N

CHARGE MINUTES STANDBY TIME
148363
TAG NO. 148363

THIS DELIVERY TICKET HAS BEEN PREPARED BY AN
80 SERIES COMPUTERIZED BATCHING CONTROL,
WITH COMMAND CENTER OPTIONS.

ts1=1-1-r·1 1
Reinforcing Ins ction

1. MBMIER.

LINE

2. MBMBER
UNI!

3. MBMBBR
)} LINE
" M8MB8R
LlNB ,ROW 10 ,LBVBL
c.onlinued OC\ IW-7 Y• 0 No •
IDAR GRADESSPEClfmo? V"'f GR.A.DBS COMPLY? CHECKBD SIZES? OllCKBDSPACINC? ~ CHllCUDLAPS? "'lire~ .. --- CHBCDDRADU?:::::=== CHBCICBD POSITION?: ~ CHBCICEDCLEAIANCE? ':t( CHSCJCED ANCHOR BOLTS? _.lt/~----- CONTINUm' PRIMOUS1 CON11NUITY f' Y• 0 NoCJ
a.,,9o11101

I .
1 ·
..

TO CERTIFY that the following de. commodity !~;~!'!~!',~~o7!~~ ~!!~aster, w~nature is on this certificate, who is a recognized 'of •ilC<!'JtaC"f •• as prescribed by Chapter 7 (commencing with Section 12700) of Division 5 of the California Business and Professions Code, administered by the Division of rds of the Calttomia Department of Food and Agriculture.

SANTACRUZ
· ·PHONE426-7280
P.O. BOX507
1<16 ENCINAL
95060
DCM
DATE
0~/2f./Oi 12: 12:08

JOB NAME OR NUMBER
DCM f)
WARNING: • CONCRETE CONTAINS PORTLAND CEMENT.
• IRRITATftG TO THESKIN AND EYES.
•AVOID CONTACT WITH EYES ANO PROLONGED CONTACT WITH SKIN. •WEAR RUBBER BOOTS AND GLOVES. • IN CASE OF CONTACT WITH SKll OR EVES,
FLUSH THOROUGHLY WITH WATER. IF

IRRITATION PERSISTS, GET MEDICAL
ATTENTION.
· ; KEEP CHILDREN AWAY.

PROPERTY DAMAGE RELEASE
{TO BE SIGNED IF DalVERY TO BE MADE INSIDE CURB LINE)
Dear Customer • The driver of this tru~ in presenting this RELEASE to you f(){ your signature iS ot f\e opinion that the- size and weight of his trudt may possibly cause damage to the premises and/Of adjacent properly if he places the mate<lal in l!>is load where you desire it. It is our wish to help you in every way that we can, but fn order to do tfVs the driver is requesting that you sign 111is RELEASE reli<lvlng him and U.S ANIMAS CONCRETE & BUILDING SUPPLY, INC. from any responsibility from any damage that may occur ID tho premises and/or adjacent property, buildings, sidewalk, driveways, corbs, etc. by 1he delivery of tllis material, and that you also agree ID help him remove mud from the - of his - sc that he will not Utter the public street. Further, as additional consideration, th& undersigned agtees to indemnify and hold harmless 1!>e driver o!l!>is truck and LAS ANIMAS CONCRETE & BUILDING SUPPLY, INC. lor any and all damage to the premises and/or adjacent property which may be claimed by anyone lo have arisen out of deliW>ly of this e<der.

SIGNED

LOAD RECEIVED BY
x
PURCHASER AGREES TO PAY FOR MATERIALS LISTED ABOVE WITHIN 30 DAYS FROM DATE. IF COURT ACTION IS INSTITUTED ON THIS INVOICE, THE PURCHASER PROMISES TO Pf\Y REASONABLE ATIORNEYS FEES.

DELIVER TO
LOT NO.

1. JOB NOT READY

2. SLOW POUR OR PUMP

3. TRUCK AHEAD ON JOB
WALKEH f!, RIVEHSlDE

WATSONVILLE
P.O. NUMBER

4. CONTRACTOR BROKE DOWN ARRIVE JOB

5. ADDED WATER

6. TRUCK BROKE DOWN

1. ACCIDENT

8. CITATION

9. OTHER

CYLINDERS TAKEN
YARDS
• !)

YARDS ORDERED

START UNLOADING

FINISH UNLOADING

ARRIVE PLANT

TOTAL TIME
CaCL2
MAX.SIZE
01 TRUCK NO.

HRS.· • MIN.
•

TIME ORDERED
SLUMP

YARDS DELIVERED
000'9. (Ii)
GAL. WATER ADDED BY REQUEST AT JOB SITE AUTHORIZED BY
GALS.

BY
LAS AN! CONCRETE & BUILDING SUPPLY, INC. - WEIGHMASTER r .,...~ . DEPUr SER HA~~OMPUTEO BY A "PERIODIC RATE' OF 1 112% PER MONTH WHICH IS AN ANNU! PERCENTAGE RATE OF 18% ON PAST DUE ACCOUNTS.

BtnCH NO. 72
QUANTITY : UNIT I PRODUCT DESCRIPTION I PRICE I AMOUNT
' I '
WAT TRIM 3.0 - t)l/02 BSZ 4. ~)
BJiTCH NO. 73
(..)2/0<? BSZ 4. e;o
Bf.HCH NO.
·AGG
AGG
CEM
Wif
AXH
TIME
ENO
AGG
CEM
04 1550(1
o·-, (_ 1.J1 ~0
01 ~'?t:~6
01 lt\4
o(:· .. E:'.34
U:': 17: ;?J
Ti-lHE).'1
71t
LB
LEI
LJ_l,;>,
GL
oz

9. (li) LA70930
MC LO
MC 5.0
suB 1cnm ..

COD N
.JtJ WOT
AXA
AXE
AXC
AY.r.>
·-40 LP
11(> t B
OU t'L
(Ji) oz
(IQ U'Z
00 w
Ii, 0 L1L

CHARGE MINUTES STANDBY TIME
1489%
TAG NO. 14 8996 TH1S DELIVERY TICKET HAS BEEN PREPARED BY AN 80 SERIES COMPUTERIZED BATCHING CONTROL. WITH COMMAND CENTER OPTIONS.