Agenda packet — Santa Cruz City Council, June 28, 2022 (part 5 of 7)

(feet bgs) (Yes / No) (ppm)
EM-34-1' 8/3/2021 1 No 784 637
EM-34-2' 8/3/2021 2 No 56 37.9
EM-35-0.5' 8/3/2021 0.5 No 1,822 1,800
EM-35-2' 8/3/20214 2 No 147 198
EM-36-0.5' 8/3/2021 0.5 No 1,579 2,090
EM-36-2' 8/3/2021 2 No 64 28.6
EM-37-0.5' 8/3/2021 0.5 No 955 571
EM-37-2' 8/3/2021 2 No 13 14.7
EM-38-0.5' 8/3/2021 0.5 No 499 490
EM-38-2' 8/3/2021 2 No 48 41.3
EM-39-0.5' 8/3/2021 0.5 No 519 504
EM-39-2' 8/3/2021 2 No 285 220
EM-40-0.5 8/3/2021 0.5 No 245 323 O1
EM-40-2' 8/3/2021 2 No 16 18.6
R-1-0.5' 8/4/2021 0.5 No 226 400
R-1-2' 8/4/2021 2 No 131 61.5
R-2-0.5' 8/4/2021 0.5 No 28 215
R-2-2' 8/4/2021 2 No 4 8.80 O1
R-3-0.5' 8/3/2021 0.5 No 810 1,530
R-3-2' 8/3/2021 2 No 12 31.4
R-4-0.5' 8/4/2021 0.5 No 1,302 1,600
R-4-2' 8/4/2021 2 No 16 23.7
R-5-0.5' 8/4/2021 0.5 No 234 9.86
R-5-2' 8/4/2021 2 No 18 17.9
R-6-0.5' 8/3/2021 0.5 No 628 573
R-6-2' 8/3/2021 2 No 290 341
R-7-0.5' 8/4/2021 0.5 No 454 456
R-7-2' 8/4/2021 2 No 33 66.0
R-8-1.5' 8/4/2021 1.5 No 98 --
R-8-2' 8/4/2021 2 No 93 --
R-9-0.5' 8/4/2021 0.5 No 182 256
R-9-2' 8/4/2021 2 No 11 6.59
R-10-0.5' 8/4/2021 0.5 No 86 94.0
R-10-2' 8/4/2021 2 No 3 12.5
R-11-0.5' 8/4/2021 0.5 No 93 75.7
R-11-2' 8/4/2021 2 No 20 23.3
R-12-0.5' 8/4/2021 0.5 No 61 --
R-12-2' 8/4/2021 2 No 28 --
R-13-0.5' 8/5/2021 0.5 No 741 686
R-13-2' 8/5/2021 2 No 17 31.9
R-14-0.5' 8/5/2021 0.5 No 1,075 1,220
R-14-2' 8/5/2021 2 No 6 10.9
Lead
(mg/kg)
Sample ID Date Sample Depth Lead Shot
Observed XRF Reading
Background Level1 43
Recreational Trail Use Screening Level3 540
Commercial Screening Level2 320
Unrestricted (Residential) Screening Level2 80
East Meadow
Ravine

42.104
Table 1
Lead Concentrations in Soil
Lower Main Meadow, Pogonip Open Space
Santa Cruz, California

Page 2 of 2 ends

(feet bgs) (Yes / No) (ppm)
Lead
(mg/kg)
Sample ID Date Sample Depth Lead Shot
Observed XRF Reading
Background Level1 43
Recreational Trail Use Screening Level3 540
Commercial Screening Level2 320
Unrestricted (Residential) Screening Level2 80
East Meadow
T-1-0.5' 8/3/2021 0.5 No 19 --
T-1-2' 8/3/2021 2 No 14 --
T-2-0.5' 8/4/2021 0.5 No 23 --
T-2-2' 8/4/2021 2 No 6 --
T-3-0.5' 8/4/2021 0.5 No 384 474
T-3-2' 8/4/2021 2 No 8 8.15
T-4-0.5' 1/11/2022 0.5 No 48 --
T-4-2' 1/11/2022 2 No 15 --
T-5-0.5' 1/11/2022 0.5 No 99 159
T-5-2' 1/11/2022 2 No 13 7.07
T-6-0.5' 1/11/2022 0.5 No 152 / 489 / 91 187
T-6-2' 1/11/2022 2 No 12 9.42
T-7-0.5' 1/11/2022 0.5 No 107 / 82 153
T-7-2' 1/11/2022 2 No 33 8.92
NO-13-0.5' 8/5/2021 0.5 No 14 --
NO-13-2' 8/5/2021 2 No 3 --
NO-14-0.5' 8/5/2021 0.5 No 56 --
NO-14-2' 8/5/2021 2 No 4 --
WM-16-0.5' 8/5/2021 0.5 No 18 --
WM-16-2' 8/5/2021 2 No 3 --
WM-17-0.5' 8/5/2021 0.5 No 133 --
WM-17-2' 8/5/2021 2 No 5 --
Notes:

Soil samples sieved using No. 10 sieve and metals analyzed using USEPA Method 6020.

Analytes detected above laboratory reporting limit are emboldened.

Analytes detected above background level and Recreational Trail User Screening Level are highlighted.

XRF = X-Ray Fluorescence.
bgs = below ground surface.
ppm = parts per million.
mg/kg = milligrams per kilogram.
-- = Not analyzed.

References:

LBNL, 2009. Analysis of Background Distributions of Metals in Soil at Lawrence Berkeley National Laboratory. Revised April.

RMD, 2020. Preliminary Endangerment Assessment Report, Pogonip Farm and Garden, 333 Golf Club Drive, Santa Cruz, California. August 4 Sample EM-35-2' initially reported a lead concentration of 5,810 mg/kg and was reanalyzed to confirm the result. The reanalyzed sample reported a lead concentration of 198 mg/kg.
3 The Recreational Trail Use Screening Level was determined based on an evaluation of soil data collected from 2019-2020 and was described in the Preliminary Endangerment Assessment Report (RMD, 2020). 1 Lawrence Berkeley National Laboratory (LBNL, 2009), was used to establish an acceptable upper estimate background concentration for O1 = The analyte failed the method required serial dilution test and/or subsequent post-spike criteria. These failures indicate matrix interference.

Emma McCrary Trail Area
West Meadow
North Orchard
2 In order of priority, the screening level represents the Department of Toxic Substances Control (DTSC)-modified screening level (DTSC, 2020) followed by U.S. Environmental Protection Agency (USEPA) Regional Screening Level (RSL; USEPA, 2020).

42.105
Table 2
Polycyclic Aromatic Hydrocarbon Concentrations in Soil
Lower Main Meadow, Pogonip Open Space
Santa Cruz, California

Page 1 of 2 ends

Sample
Depth
Depth Clay
Target
Fragments
Observed
(feet bgs) (feet bgs)
Unrestricted (Residential) Screening Level1
Commercial Screening Level1
Recreational Trail Use Screening Level2
WM-C-5-0.5' 05/13/2020 0 - 0.5 <0.00645 <0.00645 0.00425 J 0.00642 J 0.00668 0.00606 J 0.00326 J 0.00552 J <0.00645 0.00445 J <0.00645 0.00467 J <0.00645 0.00486 J <0.0215 <0.0215 <0.0215 WM-C-6-0.5' 05/14/2020 0 - 0.5 <0.00644 <0.00644 <0.00644 <0.00644 0.00244 J <0.00644 <0.00644 <0.00644 <0.00644 <0.00644 <0.00644 <0.00644 <0.00644 <0.00644 <0.0215 <0.0215 <0.0215 WM-C-7-0.5' 05/14/2020 0 - 0.5 <0.00752 <0.00752 0.00232 J 0.00283 J 0.00352 J 0.00295 J <0.00752 <0.00752 <0.00752 <0.00752 <0.00752 <0.00752 <0.00752 0.00292 J <0.0251 <0.0251 <0.0251 WM-C-8-0.5' 05/14/2020 0 - 0.5 0.0273 0.0102 0.216 0.267 0.323 0.176 0.081 0.261 0.0532 0.340 0.00293 J 0.155 0.102 0.309 <0.0240 <0.0240 <0.0240 WM-C-8-2' 05/14/2020 1.5 - 2 <0.00741 <0.00741 <0.00741 <0.00741 <0.00741 <0.00741 <0.00741 <0.00741 <0.00741 <0.00741 <0.00741 <0.00741 <0.00741 <0.00741 <0.0247 <0.0247 <0.0247 WM-C-9A-1' 05/15/2020 0.5 - 1 0.231 0.0866 5.64 10.4 11.5 4.88 2.79 6.44 1.85 4.22 0.0319 J 4.99 <0.215 0.828 4.68 <0.215 <0.215 WM-C-9-2' 05/14/2020 1.5 - 2 <0.00717 <0.00717 0.0332 0.0608 0.0593 0.0545 0.0232 0.0412 0.0145 0.0272 <0.00717 0.0446 0.00582 J 0.0319 <0.0239 <0.0239 <0.0239 WM-C-10-0.5' 05/14/2020 0 - 0.5 0.0115 0.00499 J 0.121 0.185 0.192 0.131 0.0803 0.172 0.0395 0.162 <0.00706 0.112 0.0508 0.155 <0.0235 <0.0235 <0.0235 WM-C-10-2' 05/14/2020 1.5 - 2 0.0258 0.00645 J 0.175 0.243 0.298 0.179 0.0819 0.217 0.0506 0.268 0.00249 J 0.153 0.0736 0.229 <0.0217 <0.0217 <0.0217 WM-C-11-0.5' 05/13/2020 0 - 0.5 <0.00640 <0.00640 0.00257 J 0.00383 J 0.00553 J 0.00419 J <0.00640 0.00307 J <0.00640 0.00273 J <0.00640 0.00306 J <0.00640 0.0028 J <0.0213 <0.0213 <0.0213 WM-C-11-2' 05/13/2020 1.5 - 2 0.56 0.23 2.68 2.56 2.88 1.42 0.772 3.02 0.468 3.81 0.123 1.25 2.43 4.18 0.0112 J 0.0106 J 0.0215 J WM-DG-1-0.5' 05/13/2020 0 - 0.5 <0.00687 <0.00687 <0.00687 <0.00687 0.00247 J <0.00687 <0.00687 <0.00687 <0.00687 <0.00687 <0.00687 <0.00687 <0.00687 <0.00687 <0.0229 <0.0229 <0.0229 WM-DG-2-0.5' 05/13/2020 0 - 0.5 <0.00725 <0.00725 <0.00725 <0.00725 <0.00725 <0.00725 <0.00725 <0.00725 <0.00725 <0.00725 <0.00725 <0.00725 <0.00725 <0.00725 <0.0242 <0.0242 <0.0242 WM-DG-3-0.5' 05/13/2020 0 - 0.5 <0.00676 <0.00676 <0.00676 <0.00676 0.00267 J 0.00215 J <0.00676 <0.00676 <0.00676 <0.00676 <0.00676 <0.00676 <0.00676 <0.00676 <0.0225 <0.0225 <0.0225 WM-DG-4-0.5' 05/13/2020 0 - 0.5 <0.00726 <0.00726 <0.00726 0.0027 J 0.00347 J 0.00283 J <0.00726 <0.00726 <0.00726 <0.00726 <0.00726 <0.00726 <0.00726 <0.00726 <0.0242 <0.0242 <0.0242 WM-DG-5-0.5' 05/13/2020 0 - 0.5 <0.00733 <0.00733 <0.00733 0.00239 J 0.00287 J 0.00256 J <0.00733 <0.00733 <0.00733 <0.00733 <0.00733 <0.00733 <0.00733 <0.00733 <0.0244 <0.0244 <0.0244 WM-DG-6-0.5' 05/13/2020 0 - 0.5 0.131 0.0763 2.85 3.61 3.88 2.27 1.31 3.61 0.836 3.07 0.0173 2.03 0.633 3.23 0.00974 J 0.0111 J 0.0133 J WM-DG-6-2' 05/13/2020 1.5 - 2 0.185 0.114 5.43 7.56 7.92 4.06 1.85 7.05 0.238 5.06 0.0248 3.58 0.942 6.73 0.0141 J 0.0162 J 0.0194 J WM-DG-7-0.5' 05/13/2020 0 - 0.5 <0.00639 <0.00639 0.00345 J 0.00558 J 0.00635 J 0.00506 J <0.00639 0.00452 J <0.00639 0.00399 J <0.00639 0.00419 J <0.00639 0.00411 J <0.0213 <0.0213 <0.0213 WM-DG-8-0.5' 05/13/2020 0 - 0.5 <0.00730 <0.00730 0.0529 0.107 0.113 0.0893 0.0331 0.0669 0.0252 0.0409 <0.00730 0.0754 0.00898 0.0444 <0.0243 <0.0243 <0.0243 WM-DG-9-0.5' 05/13/2020 0 - 0.5 <0.00694 <0.00694 <0.00694 0.00271 J 0.0034 J 0.00272 J <0.00694 <0.00694 <0.00694 <0.00694 <0.00694 0.00213 J <0.00694 <0.00694 <0.0231 <0.0231 <0.0231 WM-DG-10-0.5' 05/13/2020 0 - 0.5 <0.00690 <0.00690 0.00254 J 0.00254 J 0.00298 J <0.00690 <0.00690 0.00297 J <0.00690 0.00366 J <0.00690 <0.00690 <0.00690 0.00373 J <0.0230 <0.0230 <0.0230 WM-DG-11-0.5' 05/14/2020 0 - 0.5 <0.0242 <0.0242 0.041 0.0608 0.0665 0.0445 0.0224 J 0.0535 0.0115 J 0.0469 <0.0242 0.0371 0.0158 J 0.0477 <0.0804 <0.0804 <0.0804 WM-DG-11-0.5'-DUP 05/14/2020 0 - 0.5 Duplicate 0.986 0.651 8.45 10.5 12.2 3.35 4.00 9.86 2.38 11.1 0.260 3.61 4.14 11.8 0.321 0.0762 0.11 WM-DG-11A-1' 05/15/2020 0.5 - 1 0.00491 J <0.00659 0.0544 J3 0.0886 J3,J6 0.0813 J3,J6 0.0751 J3 0.0336 J3 0.0709 J3 0.0196 0.0595 <0.00659 0.0637 J3 <0.0220 0.0152 0.061 <0.0220 <0.0220 WM-DG-11-2' 05/14/2020 1.5 - 2 <0.00716 <0.00716 0.00212 J 0.00258 J 0.00271 J <0.00716 <0.00716 <0.00716 <0.00716 <0.00716 <0.00716 <0.00716 <0.00716 <0.00716 0.00716 J <0.0239 <0.0239 WM-DG-12-0.5' 05/14/2020 0 - 0.5 0.0278 0.0132 0.304 0.354 0.415 0.243 0.12 0.365 0.0661 0.347 0.00273 J 0.203 0.13 0.498 <0.0222 <0.0222 <0.0222 WM-DG-12-2' 05/14/2020 1.5 - 2 <0.00675 <0.00675 0.0100 0.00997 0.0102 0.00534 J 0.00445 J 0.0126 <0.00675 0.014 <0.00675 0.00474 J 0.00682 0.0159 <0.0225 <0.0225 <0.0225 WM-DG-13-1.5' 05/14/2020 1 - 1.5 0.252 0.113 6.42 11.7 14.8 7.52 4.02 8.75 4.45 5.74 0.0241 6.25 0.901 5.68 0.0462 0.0166 J 0.0201 J WM-DG-13-2' 05/14/2020 1.5 - 2 0.00609 J <0.00670 0.19 0.358 0.393 0.365 0.123 0.257 0.105 0.123 <0.00670 0.292 0.0186 0.158 0.00491 J <0.0223 <0.0223 WM-DG-14-0.5' 05/14/2020 0 - 0.5 <0.00659 <0.00659 0.00997 0.0149 0.0169 0.0138 0.00589 J 0.0122 0.00377 J 0.0108 <0.00659 0.0107 0.00295 J 0.0124 <0.0220 <0.0220 <0.0220 WM-DG-15-0.5' 05/14/2020 0 - 0.5 <0.00686 <0.00686 0.00482 J 0.00658 J 0.00832 0.00645 J 0.00264 J 0.00575 J <0.00686 0.00552 J <0.00686 0.00486 J <0.00686 0.0065 J <0.0229 <0.0229 <0.0229 NO-3-0.5' 05/14/2020 0 - 0.5 <0.00726 <0.00726 <0.00726 <0.00726 0.00191 J <0.00726 <0.00726 <0.00726 <0.00726 <0.00726 <0.00726 <0.00726 <0.00726 <0.00726 <0.0242 <0.0242 <0.0242 NO-4-0.5' 05/14/2020 0 - 0.5 <0.00700 <0.00700 <0.00700 <0.00700 <0.00700 <0.00700 <0.00700 <0.00700 <0.00700 <0.00700 <0.00700 <0.00700 <0.00700 <0.00700 <0.0233 <0.0233 <0.0233 NO-6-0.5' 05/14/2020 0 - 0.5 <0.00786 <0.00786 <0.00786 <0.00786 <0.00786 <0.00786 <0.00786 <0.00786 <0.00786 <0.00786 <0.00786 <0.00786 <0.00786 <0.00786 <0.0262 <0.0262 <0.0262 EM-1-0.5' 05/12/2020 0 - 0.5 <0.00688 <0.00688 J3 <0.00688 <0.00688 0.00228 J <0.00688 <0.00688 J3 <0.00688 <0.00688 <0.00688 <0.00688 <0.00688 <0.00688 <0.00688 <0.0229 J3 <0.0229 J3 <0.0229 J3 EM-2-0.5' 05/12/2020 0 - 0.5 <0.00693 <0.00693 0.00233 J 0.00267 J 0.00508 J 0.00326 J <0.00693 0.0028 J <0.00693 0.00337 J <0.00693 0.00232 J <0.00693 0.00292 J <0.0231 <0.0231 <0.0231 EM-3-0.5' 05/12/2020 0 - 0.5 <0.00690 <0.00690 <0.00690 <0.00690 0.00324 J 0.00258 J <0.00690 <0.00690 <0.00690 <0.00690 <0.00690 <0.00690 <0.00690 <0.00690 <0.0230 <0.0230 <0.0230 EM-4-1.5' 05/12/2020 1 - 1.5 <0.00656 <0.00656 <0.00656 <0.00656 <0.00656 <0.00656 <0.00656 <0.00656 <0.00656 <0.00656 <0.00656 <0.00656 <0.00656 <0.00656 <0.0219 <0.0219 <0.0219 EM-5-0.5' 05/12/2020 0 - 0.5 <0.00647 <0.00647 <0.00647 <0.00647 <0.00647 <0.00647 <0.00647 <0.00647 <0.00647 <0.00647 <0.00647 <0.00647 <0.00647 <0.00647 <0.0216 <0.0216 <0.0216 EM-6-0.5' 05/12/2020 0 - 0.5 <0.00671 <0.00671 <0.00671 <0.00671 0.00332 J 0.00223 J <0.00671 <0.00671 <0.00671 <0.00671 <0.00671 <0.00671 <0.00671 <0.00671 <0.0224 <0.0224 <0.0224 EM-7-0.5' 05/12/2020 0 - 0.5 <0.00663 <0.00663 <0.00663 <0.00663 0.00224 J <0.00663 <0.00663 <0.00663 <0.00663 <0.00663 <0.00663 <0.00663 <0.00663 <0.00663 <0.0221 <0.0221 <0.0221 EM-8-1' 05/12/2020 0.5 - 1 <0.00652 <0.00652 <0.00652 <0.00652 <0.00652 <0.00652 <0.00652 <0.00652 <0.00652 <0.00652 <0.00652 <0.00652 <0.00652 <0.00652 <0.0217 <0.0217 <0.0217 EM-9-0.5' 05/12/2020 0 - 0.5 <0.00641 <0.00641 <0.00641 <0.00641 <0.00641 <0.00641 <0.00641 <0.00641 <0.00641 <0.00641 <0.00641 <0.00641 <0.00641 <0.00641 <0.0214 <0.0214 <0.0214 EM-10-0.5' 05/12/2020 0 - 0.5 0-1.5 <0.00633 <0.00633 <0.00633 <0.00633 <0.00633 <0.00633 <0.00633 <0.00633 <0.00633 <0.00633 <0.00633 <0.00633 <0.00633 <0.00633 <0.0211 <0.0211 <0.0211 EM-11-0.5' 05/12/2020 0 - 0.5 <0.00708 <0.00708 <0.00708 <0.00708 <0.00708 <0.00708 <0.00708 <0.00708 <0.00708 <0.00708 <0.00708 <0.00708 <0.00708 <0.00708 0.0114 J <0.0236 0.0102 J EM-21-0.5' 05/14/2020 0 - 0.5 <0.00646 <0.00646 <0.00646 <0.00646 <0.00646 <0.00646 <0.00646 <0.00646 <0.00646 <0.00646 <0.00646 <0.00646 <0.00646 <0.00646 <0.0215 <0.0215 <0.0215 EM-21-0.5'-DUP 05/14/2020 0 - 0.5 Duplicate <0.00650 <0.00650 <0.00650 <0.00650 0.00183 J <0.00650 <0.00650 <0.00650 <0.00650 <0.00650 <0.00650 <0.00650 <0.00650 <0.00650 <0.0217 <0.0217 <0.0217 DIBENZ(A,H) ANTHRACENE Sample ID Date Notes

ANTHRACENE

ACENAPHTHENE

BENZO(A)

ANTHRACENE

BENZO(A)
PYRENE

BENZO(B)

FLUORANTHENE

BENZO(G,H,I)

PERYLENE

BENZO(K)

FLUORANTHENE

CHRYSENE
1-METHYL

NAPHTHALENE
2-METHYL

NAPHTHALENE
(mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg)

FLUORANTHENE

FLUORENE
INDENO(1,2,3-CD)
PYRENE

PHENANTHRENE
PYRENE

NAPHTHALENE
(mg/kg) (mg/kg) (mg/kg)
17,000 3,300 1.1 0.11 1.1 NE 11
(mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg)
1,800 2.0 9.9 190
120,000 23,000 45 4.5 45 NE
110 0.028 2,400 2,300 1.1 NE
West Meadow
450 4,500 1.1 NE 16,000 45 NE 12,000 38 160 1,600
130,000 23,000 12 1.3 13

0.5-1.5

0.5-1

0.5-2
North Orchard
East Meadow
NE 130 1,300 0.31 18,000 17,000 13 NE 13,000 6.5 30 1,300

42.106
Table 2
Polycyclic Aromatic Hydrocarbon Concentrations in Soil
Lower Main Meadow, Pogonip Open Space
Santa Cruz, California

Page 2 of 2 ends

Notes:

PAHs analyzed using USEPA Method 8270C-SIM.

Analytes detected above laboratory reporting limit are emboldened.

Analytes detected above Unrestricted (Residential) Screening Level are highlighted orange.

Analytes detected above Recreational Trail Use Screening Level are highlighted blue.

Analytes detected above Commercial Screening Level are underlined. bgs = Below ground surface.
mg/kg = Milligrams per kilogram.

NE = Not Established.

PAHs = Polycyclic Aromatic Hydrocarbons.

SIM = Selective Ion Mode.

J = The identification of the analyte is acceptable; the reported value is an estimate.

J3 = The associated batch QC was outside the established quality control range for precision.

J6 = The sample matrix interfered with the ability to make any accurate determination; spike value is low. 1 The screening level represents the Department of Toxic Substances Control (DTSC)-modified screening level (DTSC, 2020). 2 The Recreational Trail Use Screening Level was determined based on an evaluation of soil data collected from 2019-2020.

References:

DTSC, 2020. Human Health Risk Assessment (HHRA) Note Number 3. June.

42.107

APPENDIX A

EXCERPTS FROM PREVIOUS REPORTS

42.108
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DRAFT 42.111
Map showing sample locations:

References (shown in the order they appear linked in the text):
1) https://ag.umass.edu/soil-plant-nutrient-testing-laboratory/fact-sheets/sampling-instructio ns-for-routine-soil-analysis
2) https://ag.umass.edu/soil-plant-nutrient-testing-laboratory/fact-sheets/soil-lead-testing-int erpretation-recommendations
3) https://ag.umass.edu/soil-plant-nutrient-testing-laboratory/fact-sheets/soil-lead-testing-int erpretation-recommendations
4) https://ag.umass.edu/soil-plant-nutrient-testing-laboratory/fact-sheets/soil-lead-testing-int erpretation-recommendations
5) Lead in Residential Soils: Sources, Testing, and Reducing Exposure. Pennsylvania State College of Agricultural Sciences. Copyright 1999
6) http://smallfarms.oregonstate.edu/sfn/su10toxicmetals 7) https://www.atsdr.cdc.gov/csem/csem.asp?csem=34&po=8

42.112
Table A1
Summary of Soil Analytical Results
Pogonip Farm and Garden
Santa Cruz, California

Page 1 of 2 ends

Arsenic Copper Lead Zinc Diesel Motor Oil

0.26 3,100 80 23,000 260 12,000

0.31 47,000 320 350,000 1,200 180,000

0.98 14,000 160 110,000 1,100 54,000
B1 2/28/2019 0.0-0.5 Composite 2.1 3.9 120 17 <0.24 <1.3 B1N-0.5 2/28/2019 0.0-0.5 Discrete --- --- 150 --- --- --- B1S-0.5 2/28/2019 0.0-0.5 Discrete --- --- 58 --- --- --- B1E-0.5 2/28/2019 0.0-0.5 Discrete --- --- 110 --- --- --- B1W-0.5 2/28/2019 0.0-0.5 Discrete --- --- 64 --- --- --- B1 2/28/2019 1.5-2.0 Composite 2.9 4.6 6.2 18 --- ---
B1N-2.0 2/28/2019 1.5-2.0 Discrete --- --- 4.5 --- --- --- B1S-2.0 2/28/2019 1.5-2.0 Discrete --- --- 9.5 --- --- --- B1E-2.0 2/28/2019 1.5-2.0 Discrete --- --- 8.0 --- --- --- B1W-2.0 2/28/2019 1.5-2.0 Discrete --- --- 6.4 --- --- --- B2 2/28/2019 0.0-0.5 Composite 2.0 3.2 60 60 <0.24 <1.3 B2 2/28/2019 1.5-2.0 Composite 1.6 3.3 5.8 98 --- ---
B3 2/28/2019 0.0-0.5 Composite 2.8 3.1 84 20 <0.24 <1.3 B3N-0.5 2/28/2019 0.0-0.5 Discrete --- --- 190 --- --- --- B3S-0.5 2/28/2019 0.0-0.5 Discrete --- --- 48 --- --- --- B3E-0.5 2/28/2019 0.0-0.5 Discrete --- --- 47 --- --- --- B3W-0.5 2/28/2019 0.0-0.5 Discrete --- --- 89 --- --- --- B3 2/28/2019 1.5-2.0 Composite 2.5 3.9 5.6 22 --- ---
B3N-2.0 2/28/2019 1.5-2.0 Discrete --- --- 5.7 --- --- --- B3S-2.0 2/28/2019 1.5-2.0 Discrete --- --- 11 --- --- --- B3E-2.0 2/28/2019 1.5-2.0 Discrete --- --- 20 --- --- --- B3W-2.0 2/28/2019 1.5-2.0 Discrete --- --- 5.8 --- --- --- B4 2/28/2019 0.0-0.5 Composite 1.8 3.6 24 19 <0.24 <1.3 B4 2/28/2019 1.5-2.0 Composite 1.8 3.8 6.6 19 --- ---
B5 2/28/2019 0.0-0.5 Composite 9.6 4.2 25 26 <0.24 <1.3 B5 2/28/2019 1.5-2.0 Composite 7.3 3.7 4.6 20 --- ---
B6 2/28/2019 0.0-0.5 Composite 1.6 4.0 60 23 8.4 A01, A52 85 A01, A57 B6 2/28/2019 1.5-2.0 Composite 2.1 3.5 6.4 22 --- ---
B7 2/28/2019 0.0-0.5 Composite 3.2 50 38 160 <0.24 <1.3 B7 2/28/2019 1.5-2.0 Composite 2.9 7.1 8.6 47 --- ---
B8 2/28/2019 0.0-0.5 Composite 3.7 4.8 19 22 1.3 J, A52 2.1 J, A57 B8 2/28/2019 1.5-2.0 Composite 4.4 4.1 5.8 19 --- ---
B9 2/28/2019 0.0-0.5 Composite 1.8 3.8 8.9 19 1.3 J, A52 3.4 J, A57 Metals TPH
RWQCB Residential ESLs
RWQCB Commercial/Industrial ESLs
RWQCB Construction Worker ESLs
Sample
ID
Sample
Date
Sample
Depth
Sample
Type

42.113
Table A1
Summary of Soil Analytical Results
Pogonip Farm and Garden
Santa Cruz, California

Page 2 of 2 ends

Arsenic Copper Lead Zinc Diesel Motor Oil

0.26 3,100 80 23,000 260 12,000

0.31 47,000 320 350,000 1,200 180,000

0.98 14,000 160 110,000 1,100 54,000
Metals TPH
RWQCB Residential ESLs
RWQCB Commercial/Industrial ESLs
RWQCB Construction Worker ESLs
Sample
ID
Sample
Date
Sample
Depth
Sample
Type
B9 2/28/2019 1.5-2.0 Composite 3.0 4.3 12 20 --- ---
B10 2/28/2019 0.0-0.5 Composite 0.98 3.2 6.1 19 1.3 J, A52 1.7 J, A57 B10 2/28/2019 1.5-2.0 Composite 1.2 3.4 4.4 17 --- ---
B11 2/28/2019 0.0-0.5 Composite 2.2 4 11 20 <0.24 <1.3
B11 2/28/2019 1.5-2.0 Composite 1.9 3.5 5.1 19 --- ---
B12 2/28/2019 0.0-0.5 Composite 1.2 2.9 10 15 <0.24 <1.3 B12 2/28/2019 1.5-2.0 Composite 2.2 3.3 6.9 24 NA NA
B13 2/28/2019 0.0-0.5 Composite 1.4 2.8 70 17 NA NA
Notes: 9.6 50.0 190.0 160.0
Sample results reported in milligrams per kilogram (mg/kg).

Metals analyzed by USEPA Method 6010B.

TPH analyzed by USEPA Method 8015B.

TPH = total petroleum hydrocarbons.

Bolded value = exceedence of Residential ESL.
<0.24 = not detected above analytical laboratory Method Detection Limit (MDL). --- = not analyzed or not established.

J = Estimated Value.

A01 = Detection and quantation limits were raised due to sample dilution.

A52 = Chromatogram not typical of diesel.

A57 = Chromatogram not typical of motor oil.

RWQCB ESL = San Francisco Bay Regional Water Quality Control Board Environmental Screening Level (January 2019, Rev 1).

42.114
Table A2
Summary of Soil Analytical Results - PAHs
Pogonip Farm and Garden
Santa Cruz, California

Page 1 of 1 ends

AcenaphtheneAnthraceneBenzo[a]anthraceneBenzo[b]fluorantheneBenzo[k]fluorantheneBenzo[a]pyreneBenzo[g,h,i]perlyeneChryseneDibenzo[a,h]anthraceneFluoroantheneFluoreneIndeno[1,2,3-cd]pyrenePhenanthrenePyrene 3,600 18,000 1.1 1.1 11 0.11 NE 110 0.11 2,400 2,400 1.1 NE 1,800 45,000 230,000 20 21 210 2.1 NE 2,100 2.1 30,000 30,000 21 NE 23,000 10,000 50,000 110 110 910 10 NE 9,100 11 6,700 6,700 110 NE 5,000 B1 2/28/2019 0.0-0.5 <0.0012 <0.0012 <0.0011 <0.00095 <0.0011 0.0020 J <0.0011 <0.00097 <0.00099 <0.0014 <0.0011 <0.00092 <0.0012 <0.0015 B2 2/28/2019 0.0-0.5 <0.0012 <0.0012 0.0012 J 0.0028 J <0.0011 0.0031 <0.0011 0.0011 J <0.00099 <0.0014 <0.0011 <0.00092 <0.0012 <0.0015 B3 2/28/2019 0.0-0.5 <0.0012 <0.0012 0.0016 J 0.0034 <0.0011 0.0034 <0.0011 0.0016 J <0.00099 <0.0014 <0.0011 <0.00092 <0.0012 <0.0015 B4 2/28/2019 0.0-0.5 <0.0012 <0.0012 <0.0011 0.0019 J <0.0011 0.0024 J <0.0011 <0.00097 <0.00099 <0.0014 <0.0011 <0.00092 <0.0012 <0.0015 B5 2/28/2019 0.0-0.5 0.026 0.13 A01 0.55 A01 0.49 A01 0.20 A01 0.44 A01 0.17 A01 0.59 A01 0.063 0.78 A01 0.013 0.18 A01 0.48 A01 0.85 A01 B6 2/28/2019 0.0-0.5 0.006 0.014 0.22 A01 0.33 A01 0.10 A01 0.32 A01 0.23 A01 0.25 A01 0.066 A01 0.19 A01 0.0012 J 0.20 A01 0.042 0.24 A01 B7 2/28/2019 0.0-0.5 0.0063 0.024 0.42 A01 0.66 A01 0.26 A01 0.64 A01 0.50 A01 0.49 A01 0.17 A01 0.31 A01 0.0019 J 0.45 A01 0.075 A01 0.39 A01 B8 2/28/2019 0.0-0.5 <0.0012 <0.0012 0.0095 0.19 0.0054 0.014 0.0097 0.011 0.0016 J 0.0092 <0.0011 0.0078 0.0025 J 0.012 B9 2/28/2019 0.0-0.5 <0.0012 <0.0012 0.0021 J <0.00095 <0.0011 0.0043 J 0.0019 J 0.0023 J <0.00099 0.0019 J <0.0011 0.0015 J <0.0012 0.0022 J B10 2/28/2019 0.0-0.5 <0.0012 <0.0012 <0.0011 <0.00095 <0.0011 0.0019 J <0.0011 <0.00097 <0.00099 <0.0014 <0.0011 <0.00092 <0.0012 <0.0015 B11 2/28/2019 0.0-0.5 0.0050 0.0098 0.17 A01 0.21 A01 0.064 0.19 A01 0.091 A01 0.20 A01 0.031 0.17 A01 <0.0011 0.089 A01 0.028 0.20 A01 B12 2/28/2019 0.0-0.5 <0.0012 <0.0012 <0.0011 <0.00095 <0.0011 <0.00095 <0.0011 <0.00097 <0.00099 <0.0014 <0.0011 <0.00092 <0.0012 <0.0015 Notes:

Sample results reported in milligrams per kilogram (mg/kg).

PAHs analyzed by USEPA Method 8270C.

Bolded value = exceedence of Residential ESL.
<0.0012 = not detected above analytical laboratory Method Detection Limit (MDL).

PAHs = Polycyclic Aromatic Hydrocarbons.

NA = not analyzed.

J = Estimated Value.

NE = ESL not established.

A01 = Detection and quantation limits were raised due to sample dilution.

RWQCB ESL = San Francisco Bay Regional Water Quality Control Board Environmental Screening Level (January 2019, Rev 1).

PAHs
RWQCB Residential ESLs
RWQCB Commercial/Industrial ESLs
RWQCB Construction Worker ESLs
Sample
ID
Sample
Date
Sample
Depth
(feet)

42.115
Table A3
Metals in Soil
Pogonip Farm and Garden
Santa Cruz, California

Page 1 of 2 ends

(feet bgs) (feet bgs) (ppm)
WM-C-1-0.5' 5/13/2020 0 - 0.5 222 1.31 J 2.63 12.3 181 23.9 WM-C-1-2' 5/13/2020 1.5 - 2 54 - - - 36.9 -
WM-C-2-0.5' 5/13/2020 0 - 0.5 202 0.989 J 2.13 J 6.91 182 15.3 WM-C-2-0.5' DUP 5/13/2020 0 - 0.5 202 Duplicate 1.57 J 2.45 7.54 156 13.6 WM-C-2-2' 5/13/2020 1.5 - 2 26 - - - 11.1 -
WM-C-3-0.5' 5/13/2020 0 - 0.5 244 1.23 J 2.14 J 8.38 161 53.6 WM-C-3-2' 5/13/2020 1.5 - 2 13 - - - 23.5 -
WM-C-4-0.5' 5/13/2020 0 - 0.5 368 0.683 J 1.92 J 6.96 141 15 WM-C-4-2' 5/13/2020 1.5 - 2 27 - - - 12.6 -
WM-C-5-0.5' 5/13/2020 0 - 0.5 95 0.568 J 1.58 J 77.7 O1 76.9 O1 78.5 O1 WM-C-6-0.5' 5/14/2020 0 - 0.5 30 0.897 J,J6 2.16 4.92 10.6 19.7 WM-C-7-0.5' 5/14/2020 0 - 0.5 13 0.785 J <2.51 47.3 8.57 59.1 WM-C-8-0.5' 5/14/2020 0 - 0.5 31 0.879 J <2.40 18.1 15.0 31.0 WM-C-9A-1' 5/15/2020 0.5 - 1 105 0.727 J 1.55 J 5.61 71.2 18.6 WM-C-10-0.5' 5/14/2020 0 - 0.5 - 1.65 J 3.81 9.09 27.0 26.6 WM-C-11-0.5' 5/13/2020 0 - 0.5 45 1.47 J 10.7 7.86 29.3 24.3 WM-DG-1-0.5' 5/13/2020 0 - 0.5 241 1.41 J 2.69 8.57 188 16.4 WM-DG-1-2' 5/13/2020 1.5 - 2 9 - - - 15.9 -
WM-DG-2-0.5' 5/13/2020 0 - 0.5 168 <2.42 2.74 10.3 6.16 12.9 WM-DG-3-0.5' 5/13/2020 0 - 0.5 90 0.833 J 1.28 J 5.66 51.1 23.0 WM-DG-4-0.5' 5/13/2020 0 - 0.5 30 <2.42 1.76 J 16.2 19.8 28.3 WM-DG-5-0.5' 5/13/2020 0 - 0.5 19 <2.44 1.53 J 13.9 38.1 23.1 WM-DG-6-0.5' 5/13/2020 0 - 0.5 311 <2.22 2.25 11.0 27.0 18.5 WM-DG-7-0.5' 5/13/2020 0 - 0.5 120 0.721 J 1.77 J 7.01 116 17.0 WM-DG-7-2' 5/13/2020 1.5 - 2 29 - - - 12.1 -
WM-DG-8-0.5' 5/13/2020 0 - 0.5 59 0.637 J 1.43 J 9.12 55.7 21.0 WM-DG-9-0.5' 5/13/2020 0 - 0.5 28 <2.31 1.52 J 299 17.5 91.1 WM-DG-10-0.5' 5/13/2020 0 - 0.5 46 0.640 J 2.78 10.9 28.7 25.0 WM-DG-11-0.5' 5/14/2020 0 - 0.5 59 2.01 J 2.72 B 263 76.0 689 WM-DG-11-0.5'-DUP 5/14/2020 0 - 0.5 59 Duplicate 1.55 J 2.13 B,J 14.9 40.9 75.8 WM-DG-11A-1' 5/15/2020 0.5 - 1 16 <2.20 1.77 J 9.01 11.5 15.6 WM-DG-12-0.5' 5/14/2020 0 - 0.5 64 1.58 J 1.65 B,J 10.8 39.1 51.6 WM-DG-13-1.5' 5/14/2020 0 - 0.5 1,095 41.7 J 15.9 B,J 6,320 1,230 28,500 WM-DG-13-2' 5/14/2020 1.5 - 2 33 3.33 3.61 B 214 49.0 2,770 WM-DG-14-0.5' 5/14/2020 0 - 0.5 19 0.817 J 2.82 B 8.28 13.8 40.8 WM-DG-15-0.5' 5/14/2020 0 - 0.5 23 1.80 J 2.17 B,J 76.9 23.8 303 NO-1-0.5' 5/14/2020 0 - 0.5 225 3.54 3.05 B 6.32 265 24.0 NO-1-2' 5/14/2020 1.5 - 2 25 - - - 6.55 -
NO-2-0.5' 5/14/2020 0 - 0.5 119 1.65 J 1.94 B,J 8.14 107 17.6 NO-2-2' 5/14/2020 1.5 - 2 28 - - - 5.58 -
NO-3-0.5' 5/14/2020 0 - 0.5 863 6.94 4.77 B 11.3 690 21.5 NO-3-2' 5/14/2020 1.5 - 2 35 - - - 45.3 -
NO-4-0.5' 5/14/2020 0 - 0.5 211 2.03 J 1.60 B,J 8.16 180 15.7 NO-4-2' 5/14/2020 1.5 - 2 16 - - - 3.97 -
NO-5-0.5' 5/14/2020 0 - 0.5 10 1.08 J 1.57 B,J 50.8 40.0 44.2 NO-6-0.5' 5/14/2020 0 - 0.5 118 1.97 J 2.32 B,J 23.2 144 41.8 NO-6-2' 5/14/2020 1.5 - 2 14 - - - 13.9 -
NO-7-0.5' 5/14/2020 0 - 0.5 43 0.926 J 1.91 B,J 8.08 29.8 24.8 NO-8-0.5' 5/15/2020 0 - 0.5 31 0.928 J <2.46 18.9 18.5 23.1 NO-9-0.5' 5/14/2020 0 - 0.5 39 1.51 J 1.70 B,J 14.4 20.0 26.7 NO-10-0.5' 5/15/2020 0 - 0.5 17 <2.33 <2.33 18.0 14.0 27.5 NO-11-0.5' 5/15/2020 0 - 0.5 18 1.04 J 0.655 J 15.0 14.5 26.8 NO-12-0.5' 5/15/2020 0 - 0.5 21 0.718 J <2.42 17.1 10.5 49.8 EM-1-0.5' 5/12/2020 0 - 0.5 119 2.34 2.42 63.1 138 69.6 EM-1-2' 5/12/2020 1.5 - 2 39 - - - 22.1 -
EM-2-0.5' 5/12/2020 0 - 0.5 153 1.93 J 2.42 24.6 182 31.0 EM-2-2' 5/12/2020 1.5 - 2 15 - - - 13.4 -
EM-3-0.5' 5/12/2020 0 - 0.5 219 2.87 3.23 16.6 203 20.4 EM-3-2' 5/12/2020 1.5 - 2 24 - - - 51.3 -
EM-4-1.5' 5/12/2020 1 - 1.5 166 5.15 4.58 15.8 164 25.3 EM-4-2' 5/12/2020 1.5 - 2 47 - - - 61.3 -
EM-5-0.5' 5/12/2020 0 - 0.5 139 2.51 3.21 19.1 115 26.4 EM-5-2' 5/12/2020 1.5 - 2 95 - - - 53.6 -
EM-6-0.5' 5/12/2020 0 - 0.5 372 3.46 3.91 19.9 264 28.8 EM-6-2' 5/12/2020 1.5 - 2 83 - - - 17.9 -
EM-7-0.5' 5/12/2020 0 - 0.5 758 17.0 9.58 21.1 752 30.7 EM-7-2' 5/12/2020 1.5 - 2 46 - - - 117 -
EM-8-1' 5/12/2020 0.5 - 1 549 11.8 8.69 14.7 717 31.1
EM-8-2' 5/12/2020 1.5 - 2 94 - - - 140 -
EM-9-0.5' 5/12/2020 0 - 0.5 1,227 5.46 6.71 10.7 1,140 22.1 EM-9-2' 5/12/2020 1.5 - 2 168 - - - 81.9 -
(mg/kg)
Lead
(mg/kg)
1-2
XRF
Reading
80 0.5-2
11 3,100
Screening Level Source
Sample ID Date Notes
Sample
Depth
Residential Screening Level
HHRA Note 3
31 East Meadow
North Orchard
West Meadow
USEPA RSLs Background USEPA RSLs USEPA RSLs
Depth Shot
Observed Antimony Arsenic
23,000
(mg/kg)
Zinc
(mg/kg) (mg/kg)
Copper

42.116
Table A3
Metals in Soil
Pogonip Farm and Garden
Santa Cruz, California

Page 2 of 2 ends

(feet bgs) (feet bgs) (ppm) (mg/kg)
Lead
(mg/kg)
XRF
Reading
11 3,100 80
Sample ID Date Notes
Sample
Depth
Residential Screening Level 31
Depth Shot
Observed Antimony Arsenic
23,000
(mg/kg)
Zinc
(mg/kg) (mg/kg)
Copper
EM-10-0.5' 5/12/2020 0 - 0.5 2,973 6.07 8.44 12.6 1,670 29.0 EM-10-2' 5/12/2020 1.5 - 2 15 - - - 34.1 -
EM-11-0.5' 5/12/2020 0 - 0.5 569 3.78 7.16 24.4 856 36.2 EM-11-2' 5/12/2020 1.5 - 2 94 - - - 140 -
EM-12-0.5' 5/14/2020 0 - 0.5 31 <2.44 3.04 B 38.6 9.15 98.3 EM-13-0.5' 5/15/2020 0 - 0.5 24 0.815 J 0.554 J 9.98 11.2 25.4 EM-14-0.5' 5/14/2020 0 - 0.5 38 1.58 J 2.92 B 12.5 33.0 44.5 EM-14-0.5'-DUP 5/14/2020 0 - 0.5 38 Duplicate 2.14 J 2.80 B 14.0 32.5 55.3 EM-15-0.5' 5/15/2020 0 - 0.5 26 1.12 J 1.72 J 13.0 16.1 33.0 EM-16-0.5' 5/15/2020 0 - 0.5 42 1.00 J 1.33 J 14.0 24.6 37.3 EM-17-0.5' 5/15/2020 0 - 0.5 47 1.50 J 1.13 J 13.8 40.3 35.0 EM-18-0.5' 5/15/2020 0 - 0.5 39 3.29 2.35 11.2 44.5 30.5 EM-19-0.5' 5/14/2020 0 - 0.5 167 3.13 3.57 B 12.7 116 46.0 EM-19-2' 5/14/2020 1.5 - 2 64 - - - 38.4 -
EM-20-0.5' 5/15/2020 0 - 0.5 58 <2.53 2.07 J 20.5 95.2 33.4 EM-20-2' 5/15/2020 1.5 - 2 10 - - - 9.26 -
EM-21-0.5' 5/14/2020 0 - 0.5 776 10.0 6.12 7.16 768 28.7 EM-21-0.5'-DUP 5/14/2020 0 - 0.5 776 Duplicate 6.85 5.65 B 7.33 769 30.6 EM-21-2' 5/14/2020 1.5 - 2 17 - - - 9.52 -
EM-22-0.5' 5/15/2020 0 - 0.5 100 <2.28 2.39 12.3 92.6 22.8 EM-22-2' 5/15/2020 1.5 - 2 17 - - - 25.9 -
EM-23-0.5' 5/15/2020 0 - 0.5 29 0.932 J 1.24 J 12.8 10.7 26.0 EM-24-0.5' 5/15/2020 0 - 0.5 33 0.886 J 0.686 J 9.50 9.18 26.8 EM-25-0.5' 5/15/2020 0 - 0.5 30 0.786 J 0.810 J 12.2 10.3 28.7 EM-26-0.5' 5/15/2020 0 - 0.5 19 0.656 J 1.02 J 11.7 10.8 25.1 EM-27-0.5' 5/15/2020 0 - 0.5 34 1.02 J 0.823 J 13.6 6.12 26.4 EM-28-0.5' 5/15/2020 0 - 0.5 29 0.813 J 0.865 J 14.4 14.3 31.9 EM-29-0.5' 5/15/2020 0 - 0.5 31 0.720 J 1.02 J 10.8 17.8 36.8 EM-30-0.5' 5/15/2020 0 - 0.5 31 <2.25 2.52 21.9 18.0 24.1 EM-31-0.5' 5/15/2020 0 - 0.5 33 <2.30 2.07 J 9.94 15.4 19.1 EM-32-0.5' 5/15/2020 0 - 0.5 18 <2.34 2.01 J 13.8 37.4 23.0 EM-33-0.5' 5/15/2020 0 - 0.5 17 <2.25 2.23 J 8.74 12.3 19.0 Notes:

Metals analyzed using USEPA Method 6010B.

Analytes detected above laboratory reporting limit are emboldened.

Analytes detected above Residential Screening Level are highlighted.

Background = Duverge, 2011. Establishing Background Arsenic in Soil of the Urbanized San Francisco Bay Region. December.

HHRA Note 3 = DTSC, 2019. Human Health Risk Assessment (HHRA) Note Number 3. April.

USEPA RSLs = USEPA, 2020. Regional Screening Level (RSL) Summary Table (TR=1E-6, HQ=1). May.

DTSC = California Environmental Protection Agency, Department of Toxic Substances Control.

USEPA = United States Environmental Protection Agency.
bgs = Below ground surface.
mg/kg = Milligrams per kilogram.
- = Not analyzed.

B = The same analyte is found in the associated blank.

J = The identification of the analyte is acceptable; the reported value is an estimate.

J6 = The sample matrix interfered with the ability to make any accurate determination; spike value is low.

O1 = The analyte failed the method required serial dilution test and/or subsequent post-spike criteria. These failures indicate matrix interference.

42.117
Table A4
Polycyclic Aromatic Hydrocarbons in Soil
Pogonip Farm and Garden
Santa Cruz, California

Page 1 of 2 ends

Sample Depth
Depth Clay
Target
Fragments
Observed
(feet bgs) (feet bgs)
WM-C-5-0.5' 05/13/2020 0 - 0.5 <0.00645 <0.00645 0.00425 J 0.00642 J 0.00668 0.00606 J 0.00326 J 0.00552 J <0.00645 0.00445 J <0.00645 0.00467 J <0.00645 0.00486 J <0.0215 <0.0215 <0.0215 WM-C-6-0.5' 05/14/2020 0 - 0.5 <0.00644 <0.00644 <0.00644 <0.00644 0.00244 J <0.00644 <0.00644 <0.00644 <0.00644 <0.00644 <0.00644 <0.00644 <0.00644 <0.00644 <0.0215 <0.0215 <0.0215 WM-C-7-0.5' 05/14/2020 0 - 0.5 <0.00752 <0.00752 0.00232 J 0.00283 J 0.00352 J 0.00295 J <0.00752 <0.00752 <0.00752 <0.00752 <0.00752 <0.00752 <0.00752 0.00292 J <0.0251 <0.0251 <0.0251 WM-C-8-0.5' 05/14/2020 0 - 0.5 0.0273 0.0102 0.216 0.267 0.323 0.176 0.081 0.261 0.0532 0.340 0.00293 J 0.155 0.102 0.309 <0.0240 <0.0240 <0.0240 WM-C-8-2' 05/14/2020 1.5 - 2 <0.00741 <0.00741 <0.00741 <0.00741 <0.00741 <0.00741 <0.00741 <0.00741 <0.00741 <0.00741 <0.00741 <0.00741 <0.00741 <0.00741 <0.0247 <0.0247 <0.0247 WM-C-9A-1' 05/15/2020 0.5 - 1 0.231 0.0866 5.64 10.4 11.5 4.88 2.79 6.44 1.85 4.22 0.0319 J 4.99 <0.215 0.828 4.68 <0.215 <0.215 WM-C-9-2' 05/14/2020 1.5 - 2 <0.00717 <0.00717 0.0332 0.0608 0.0593 0.0545 0.0232 0.0412 0.0145 0.0272 <0.00717 0.0446 0.00582 J 0.0319 <0.0239 <0.0239 <0.0239 WM-C-10-0.5' 05/14/2020 0 - 0.5 0.0115 0.00499 J 0.121 0.185 0.192 0.131 0.0803 0.172 0.0395 0.162 <0.00706 0.112 0.0508 0.155 <0.0235 <0.0235 <0.0235 WM-C-10-2' 05/14/2020 1.5 - 2 0.0258 0.00645 J 0.175 0.243 0.298 0.179 0.0819 0.217 0.0506 0.268 0.00249 J 0.153 0.0736 0.229 <0.0217 <0.0217 <0.0217 WM-C-11-0.5' 05/13/2020 0 - 0.5 <0.00640 <0.00640 0.00257 J 0.00383 J 0.00553 J 0.00419 J <0.00640 0.00307 J <0.00640 0.00273 J <0.00640 0.00306 J <0.00640 0.0028 J <0.0213 <0.0213 <0.0213 WM-C-11-2' 05/13/2020 1.5 - 2 0.56 0.23 2.68 2.56 2.88 1.42 0.772 3.02 0.468 3.81 0.123 1.25 2.43 4.18 0.0112 J 0.0106 J 0.0215 J WM-DG-1-0.5' 05/13/2020 0 - 0.5 <0.00687 <0.00687 <0.00687 <0.00687 0.00247 J <0.00687 <0.00687 <0.00687 <0.00687 <0.00687 <0.00687 <0.00687 <0.00687 <0.00687 <0.0229 <0.0229 <0.0229 WM-DG-2-0.5' 05/13/2020 0 - 0.5 <0.00725 <0.00725 <0.00725 <0.00725 <0.00725 <0.00725 <0.00725 <0.00725 <0.00725 <0.00725 <0.00725 <0.00725 <0.00725 <0.00725 <0.0242 <0.0242 <0.0242 WM-DG-3-0.5' 05/13/2020 0 - 0.5 <0.00676 <0.00676 <0.00676 <0.00676 0.00267 J 0.00215 J <0.00676 <0.00676 <0.00676 <0.00676 <0.00676 <0.00676 <0.00676 <0.00676 <0.0225 <0.0225 <0.0225 WM-DG-4-0.5' 05/13/2020 0 - 0.5 <0.00726 <0.00726 <0.00726 0.0027 J 0.00347 J 0.00283 J <0.00726 <0.00726 <0.00726 <0.00726 <0.00726 <0.00726 <0.00726 <0.00726 <0.0242 <0.0242 <0.0242 WM-DG-5-0.5' 05/13/2020 0 - 0.5 <0.00733 <0.00733 <0.00733 0.00239 J 0.00287 J 0.00256 J <0.00733 <0.00733 <0.00733 <0.00733 <0.00733 <0.00733 <0.00733 <0.00733 <0.0244 <0.0244 <0.0244 WM-DG-6-0.5' 05/13/2020 0 - 0.5 0.131 0.0763 2.85 3.61 3.88 2.27 1.31 3.61 0.836 3.07 0.0173 2.03 0.633 3.23 0.00974 J 0.0111 J 0.0133 J WM-DG-6-2' 05/13/2020 1.5 - 2 0.185 0.114 5.43 7.56 7.92 4.06 1.85 7.05 0.238 5.06 0.0248 3.58 0.942 6.73 0.0141 J 0.0162 J 0.0194 J WM-DG-7-0.5' 05/13/2020 0 - 0.5 <0.00639 <0.00639 0.00345 J 0.00558 J 0.00635 J 0.00506 J <0.00639 0.00452 J <0.00639 0.00399 J <0.00639 0.00419 J <0.00639 0.00411 J <0.0213 <0.0213 <0.0213 WM-DG-8-0.5' 05/13/2020 0 - 0.5 <0.00730 <0.00730 0.0529 0.107 0.113 0.0893 0.0331 0.0669 0.0252 0.0409 <0.00730 0.0754 0.00898 0.0444 <0.0243 <0.0243 <0.0243 WM-DG-9-0.5' 05/13/2020 0 - 0.5 <0.00694 <0.00694 <0.00694 0.00271 J 0.0034 J 0.00272 J <0.00694 <0.00694 <0.00694 <0.00694 <0.00694 0.00213 J <0.00694 <0.00694 <0.0231 <0.0231 <0.0231 WM-DG-10-0.5' 05/13/2020 0 - 0.5 <0.00690 <0.00690 0.00254 J 0.00254 J 0.00298 J <0.00690 <0.00690 0.00297 J <0.00690 0.00366 J <0.00690 <0.00690 <0.00690 0.00373 J <0.0230 <0.0230 <0.0230 WM-DG-11-0.5' 05/14/2020 0 - 0.5 <0.0242 <0.0242 0.041 0.0608 0.0665 0.0445 0.0224 J 0.0535 0.0115 J 0.0469 <0.0242 0.0371 0.0158 J 0.0477 <0.0804 <0.0804 <0.0804 WM-DG-11-0.5'-DUP 05/14/2020 0 - 0.5 Duplicate 0.986 0.651 8.45 10.5 12.2 3.35 4.00 9.86 2.38 11.1 0.260 3.61 4.14 11.8 0.321 0.0762 0.11 WM-DG-11A-1' 05/15/2020 0.5 - 1 0.00491 J <0.00659 0.0544 J3 0.0886 J3,J6 0.0813 J3,J6 0.0751 J3 0.0336 J3 0.0709 J3 0.0196 0.0595 <0.00659 0.0637 J3 <0.0220 0.0152 0.061 <0.0220 <0.0220 WM-DG-11-2' 05/14/2020 1.5 - 2 <0.00716 <0.00716 0.00212 J 0.00258 J 0.00271 J <0.00716 <0.00716 <0.00716 <0.00716 <0.00716 <0.00716 <0.00716 <0.00716 <0.00716 0.00716 J <0.0239 <0.0239 WM-DG-12-0.5' 05/14/2020 0 - 0.5 0.0278 0.0132 0.304 0.354 0.415 0.243 0.12 0.365 0.0661 0.347 0.00273 J 0.203 0.13 0.498 <0.0222 <0.0222 <0.0222 WM-DG-12-2' 05/14/2020 1.5 - 2 <0.00675 <0.00675 0.0100 0.00997 0.0102 0.00534 J 0.00445 J 0.0126 <0.00675 0.014 <0.00675 0.00474 J 0.00682 0.0159 <0.0225 <0.0225 <0.0225 WM-DG-13-1.5' 05/14/2020 1 - 1.5 0.252 0.113 6.42 11.7 14.8 7.52 4.02 8.75 4.45 5.74 0.0241 6.25 0.901 5.68 0.0462 0.0166 J 0.0201 J WM-DG-13-2' 05/14/2020 1.5 - 2 0.00609 J <0.00670 0.19 0.358 0.393 0.365 0.123 0.257 0.105 0.123 <0.00670 0.292 0.0186 0.158 0.00491 J <0.0223 <0.0223 WM-DG-14-0.5' 05/14/2020 0 - 0.5 <0.00659 <0.00659 0.00997 0.0149 0.0169 0.0138 0.00589 J 0.0122 0.00377 J 0.0108 <0.00659 0.0107 0.00295 J 0.0124 <0.0220 <0.0220 <0.0220 WM-DG-15-0.5' 05/14/2020 0 - 0.5 <0.00686 <0.00686 0.00482 J 0.00658 J 0.00832 0.00645 J 0.00264 J 0.00575 J <0.00686 0.00552 J <0.00686 0.00486 J <0.00686 0.0065 J <0.0229 <0.0229 <0.0229 NO-3-0.5' 05/14/2020 0 - 0.5 <0.00726 <0.00726 <0.00726 <0.00726 0.00191 J <0.00726 <0.00726 <0.00726 <0.00726 <0.00726 <0.00726 <0.00726 <0.00726 <0.00726 <0.0242 <0.0242 <0.0242 NO-4-0.5' 05/14/2020 0 - 0.5 <0.00700 <0.00700 <0.00700 <0.00700 <0.00700 <0.00700 <0.00700 <0.00700 <0.00700 <0.00700 <0.00700 <0.00700 <0.00700 <0.00700 <0.0233 <0.0233 <0.0233 NO-6-0.5' 05/14/2020 0 - 0.5 <0.00786 <0.00786 <0.00786 <0.00786 <0.00786 <0.00786 <0.00786 <0.00786 <0.00786 <0.00786 <0.00786 <0.00786 <0.00786 <0.00786 <0.0262 <0.0262 <0.0262 EM-1-0.5' 05/12/2020 0 - 0.5 <0.00688 <0.00688 J3 <0.00688 <0.00688 0.00228 J <0.00688 <0.00688 J3 <0.00688 <0.00688 <0.00688 <0.00688 <0.00688 <0.00688 <0.00688 <0.0229 J3 <0.0229 J3 <0.0229 J3 EM-2-0.5' 05/12/2020 0 - 0.5 <0.00693 <0.00693 0.00233 J 0.00267 J 0.00508 J 0.00326 J <0.00693 0.0028 J <0.00693 0.00337 J <0.00693 0.00232 J <0.00693 0.00292 J <0.0231 <0.0231 <0.0231 EM-3-0.5' 05/12/2020 0 - 0.5 <0.00690 <0.00690 <0.00690 <0.00690 0.00324 J 0.00258 J <0.00690 <0.00690 <0.00690 <0.00690 <0.00690 <0.00690 <0.00690 <0.00690 <0.0230 <0.0230 <0.0230 EM-4-1.5' 05/12/2020 1 - 1.5 <0.00656 <0.00656 <0.00656 <0.00656 <0.00656 <0.00656 <0.00656 <0.00656 <0.00656 <0.00656 <0.00656 <0.00656 <0.00656 <0.00656 <0.0219 <0.0219 <0.0219 EM-5-0.5' 05/12/2020 0 - 0.5 <0.00647 <0.00647 <0.00647 <0.00647 <0.00647 <0.00647 <0.00647 <0.00647 <0.00647 <0.00647 <0.00647 <0.00647 <0.00647 <0.00647 <0.0216 <0.0216 <0.0216 EM-6-0.5' 05/12/2020 0 - 0.5 <0.00671 <0.00671 <0.00671 <0.00671 0.00332 J 0.00223 J <0.00671 <0.00671 <0.00671 <0.00671 <0.00671 <0.00671 <0.00671 <0.00671 <0.0224 <0.0224 <0.0224 EM-7-0.5' 05/12/2020 0 - 0.5 <0.00663 <0.00663 <0.00663 <0.00663 0.00224 J <0.00663 <0.00663 <0.00663 <0.00663 <0.00663 <0.00663 <0.00663 <0.00663 <0.00663 <0.0221 <0.0221 <0.0221 EM-8-1' 05/12/2020 0.5 - 1 <0.00652 <0.00652 <0.00652 <0.00652 <0.00652 <0.00652 <0.00652 <0.00652 <0.00652 <0.00652 <0.00652 <0.00652 <0.00652 <0.00652 <0.0217 <0.0217 <0.0217 EM-9-0.5' 05/12/2020 0 - 0.5 <0.00641 <0.00641 <0.00641 <0.00641 <0.00641 <0.00641 <0.00641 <0.00641 <0.00641 <0.00641 <0.00641 <0.00641 <0.00641 <0.00641 <0.0214 <0.0214 <0.0214 EM-10-0.5' 05/12/2020 0 - 0.5 0-1.5 <0.00633 <0.00633 <0.00633 <0.00633 <0.00633 <0.00633 <0.00633 <0.00633 <0.00633 <0.00633 <0.00633 <0.00633 <0.00633 <0.00633 <0.0211 <0.0211 <0.0211 EM-11-0.5' 05/12/2020 0 - 0.5 <0.00708 <0.00708 <0.00708 <0.00708 <0.00708 <0.00708 <0.00708 <0.00708 <0.00708 <0.00708 <0.00708 <0.00708 <0.00708 <0.00708 0.0114 J <0.0236 0.0102 J

0.5-1.5

0.5-2
(mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg)

0.5-1
(mg/kg) (mg/kg) (mg/kg)
11 110 0.028 2,400
(mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) PHENANTHRENE PYRENE NAPHTHALENE 1-METHYL NAPHTHALENE 2-METHYL NAPHTHALENE Sample ID Date Notes

2.0 INDENO(1,2,3-CD)
PYRENE

ANTHRACENE

ACENAPHTHENE

BENZO(A)

ANTHRACENE

BENZO(A)
PYRENE

BENZO(B)

FLUORANTHENE

BENZO(G,H,I)

PERYLENE

BENZO(K)

FLUORANTHENE

CHRYSENE

DIBENZ(A,H)

ANTHRACENE

FLUORANTHENE

FLUORENE

9.9 190
East Meadow
North Orchard
West Meadow
Residential Screening Level 17,000 3,300 1.1 0.11 1.1 NE 2,300 1.1 NE 1,800

42.118
Table A4
Polycyclic Aromatic Hydrocarbons in Soil
Pogonip Farm and Garden
Santa Cruz, California

Page 2 of 2 ends

Sample Depth
Depth Clay
Target
Fragments
Observed
(feet bgs) (feet bgs) (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) 11 110 0.028 2,400
(mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) PHENANTHRENE PYRENE NAPHTHALENE 1-METHYL NAPHTHALENE 2-METHYL NAPHTHALENE Sample ID Date Notes

2.0 INDENO(1,2,3-CD)
PYRENE

ANTHRACENE

ACENAPHTHENE

BENZO(A)

ANTHRACENE

BENZO(A)
PYRENE

BENZO(B)

FLUORANTHENE

BENZO(G,H,I)

PERYLENE

BENZO(K)

FLUORANTHENE

CHRYSENE

DIBENZ(A,H)

ANTHRACENE

FLUORANTHENE

FLUORENE

9.9 190
West Meadow
Residential Screening Level 17,000 3,300 1.1 0.11 1.1 NE 2,300 1.1 NE 1,800 EM-21-0.5' 05/14/2020 0 - 0.5 <0.00646 <0.00646 <0.00646 <0.00646 <0.00646 <0.00646 <0.00646 <0.00646 <0.00646 <0.00646 <0.00646 <0.00646 <0.00646 <0.00646 <0.0215 <0.0215 <0.0215 EM-21-0.5'-DUP 05/14/2020 0 - 0.5 Duplicate <0.00650 <0.00650 <0.00650 <0.00650 0.00183 J <0.00650 <0.00650 <0.00650 <0.00650 <0.00650 <0.00650 <0.00650 <0.00650 <0.00650 <0.0217 <0.0217 <0.0217 Notes:

PAHs analyzed using USEPA Method 8270C-SIM.

Analytes detected above laboratory reporting limit are emboldened.

Analytes detected above Residential Screening Level are highlighted.

Residential Screening Levels are based on HHRA Note 3 values. bgs = Below ground surface.
mg/kg = Milligrams per kilogram.

NE = Not Established.

PAHs = Polycyclic Aromatic Hydrocarbons.

SIM = Selective Ion Mode.

HHRA Note 3 = DTSC, 2019. Human Health Risk Assessment (HHRA) Note Number 3. April.

DTSC = California Environmental Protection Agency, Department of Toxic Substances Control.

J = The identification of the analyte is acceptable; the reported value is an estimate.

J3 = The associated batch QC was outside the established quality control range for precision.

J6 = The sample matrix interfered with the ability to make any accurate determination; spike value is low.

42.119
December 29, 2021
County of Santa Cruz Health Services Agency
Environmental Health Division
To the attention of: Heather Hanna, P.G.
701 Ocean Street, Suite 312
Santa Cruz, California 95060
[email protected]
(831) 454- 4813
Subject:

Location:

Shallow Soil Sampling for Total Lead
Lower Meadows Access Road, Pogonip, 333 Golf Club Drive, Santa Cruz This Letter Report describes completed field
sampling and laboratory testing tasks
designed to document Total Lead
concentrations along an untested access
road that is located in the vicinity of a
historic skeet shooting range. The shallow
soil sampling was completed to supplement
the results of previous shallow sampling and
testing conducted by RMD Environmental
Solutions in August 2020 (see Attachment
C).

These tasks were completed to evaluate
potential environmental risks associated
with using this dirt connector path as a
walking/ vehicle road for possible future
land uses. This report is being submitted in
accordance with an approved Workplan1
,
and includes the following attachments:

Figure 1: Topographic Location Map
Figure 2: Aerial Vicinity Map
Figure 3: Soil Sample Location Map (including Lead Results Table 1: Summary of Soil Sample Analytical Results
Attachment A: Field Documentation and Photos
Attachment B: State-Certified Laboratory Report
Attachment C: Reference: Previous Testing Results in the Vicinity (RMD, August 2020) 1 Weber Hayes and Associates (WHA) report: Workplan: Shallow Soil Sampling for Total Lead, March 2021.

Weber, Hayes & Associates
Hydrogeology and Environmental Engineering
120 Westgate Drive, Watsonville, CA 95076
(831) 722-3580 // www.weber-hayes.com
WEST
Lower Meadow
EAST
Lower Meadow

42.120
Field Sample Collection: On March 11, 2021, twelve (12) soil borings were hand-augured at sampling sites B-1 through B-12 to an approximate depth of 2‐ft below ground surface (bgs). See Figure 3 for locations. The soil samples were obtained using a stainless-steel hand-auger used to remove soils to the target depth and logged noting the lithology of the soils, moisture content, and any unusual odor or discoloration. There was no evidence of chemical impacts observed in any of the soil borings.

Two (2) samples per location were selected for laboratory analysis: one sample was obtained from ground surface to 6-inches, and the second, deeper sample was collected from 18-to 24-inches below ground surface (bgs). Relatively undisturbed soil samples were obtained using a specialty-machined slide hammer. Borings were initially augured to a target depth whereupon the slide hammer was used to drive clean stainless-steel liners into native soils. The slide hammer was then gently backtapped out of the boring to retrieve a relatively undisturbed soil sample. The stainless steel auger and sampling hammer was decontaminated between each boring location using non-phosphate detergent and distilled water.

The sample containers were labeled, placed in sealed, plastic bags, and stored in a chilled cooler for transportation under standard chain‐of‐custody procedures to Pace Analytical, a California-certified laboratory. Field notes and photo documentation of the field sampling is included in Appendix A.

Laboratory Analysis: The twenty-four (24) discrete
soil samples were analyzed for Total Lead
concentrations. The dry weight results are tabulated
along with agency screening thresholds on Table 1 and
clip of the results is presented to the right. Certified laboratory report is attached (Attachment B)
Data Summary: The majority of samples have Total
Lead concentrations below risk-based, Environmental
Screening Levels (ESL) for different land uses (i.e.,
commercial, construction worker, and unrestricted/
residential land uses. Three (3) of the twelve (12)
surface samples have detectable concentrations of
Total Lead that exceed the residential/ unrestricted
land use ESL of 80 mg/kg, but do not exceed the
commercial/construction worker threshold of 320 and
160 respectively (see Table 1 for details).

Note: This additional sampling and testing was
originally completed to provide supporting data for an
agricultural project (i.e., safe use as an access road for the possible location of Homeless Garden Project,

42.121
HGP). Currently, HGP plans for farming on this portion of Pogonip have been postponed indefinitely.

Limitations: Our service consists of professional opinions and recommendations made in accordance with generally accepted geologic principles and practices. This warranty is in lieu of all others, either expressed or implied. The analysis and conclusions in this report are based on sampling and testing which are necessarily limited. Additional data from future work may lead to modifications of the options expressed herein.

If you have any questions or comments regarding this report, please contact us our office (722-3580).

Sincerely,

WEBER, HAYES AND ASSOCIATES
ATTACHMENTS:

Figure 1: Location
Figure 2: Vicinity Map
Figure 3: Soil Sample Locations and Lead Results
Table 1: Summary of Soil Sample Analytical Results
Attachment A: Field Documentation
Attachment B: Laboratory Report
Attachment C: Reference: Previous Testing Results in the Vicinity - RMD, August 2020 By

Pat Hoban, PG
Principal Geologist

42.122

FIGURES
Figure 1: Location Map
Figure 2: Vicinity Map
Figure 3: Soil Sample Locations And Lead Results

42.123
WEBER, HAYES & ASSOCIATES Hydrogeology and Environmental Engineering 120 Westgate Drive, Watsonville, CA
831.722.3580 / www.weber-hayes.com

LOCATION MAP

PHASE II ENVIRONMENTAL SITE ASSESSMENT FIGURE
1 Project
2T058
SITE: POGONIP - ACCESS ROAD
ADDRESS: 333 GOLF CLUB DRIVE, SANTA CRUZ, CA 95060
DATE: OCTOBER 2021 REVISIONS/NOTES:

Subject
Site
0' 1,000'

APPROXIMATE SCALE
Base Map from USGS TopoView
http://ngmdb.usgs.gov

42.124

WEBER, HAYES & ASSOCIATES
Hydrogeology and Environmental Engineering
120 Westgate Drive, Watsonville, CA
831.722.3580 / www.weber-hayes.com

VICINITY MAPPHASE II ENVIRONMENTAL SITE ASSESSMENT FIGURE 2 Project
2T058
SITE: POGONIP - ACCESS ROADADDRESS: 333 GOLF CLUB DRIVE, SANTA CRUZ, CA 95060 DATE: JUNE 2021 REVISIONS/NOTES:

San Lorenzo River
Highway 9 (River St)
Former Pogonip
Polo Club House SUBJECT SITE
0' 475' APPROXIMATE SCALE BASE MAP FROM GOOGLE EARTH
Commercial Industrial
Rural-Agricultural Commercial Industrial
Rural-Agricultural
Pogonip
Recreational
Open Space

42.125

WEBER, HAYES & ASSOCIATES
Hydrogeology and Environmental Engineering
120 Westgate Drive, Watsonville, CA
831.722.3580 / www.weber-hayes.com
Soil Sample Locations And Lead Results FIGURE
3 Project
2T058
SITE: POGONIP ACCESS TRAIL EVALUATIONADDRESS: 333 GOLF CLUB DRIVE, SANTA CRUZ DATE: MARCH 2021

33.3 mg/Kg 5.06 mg/Kg
EM -1
Total Lead Depth: Concentratio
n
0-6 inches= 138. mg/Kg
19-24 inches= 22.1 mg/Kg
Commercial
(land use limit)
320 mg/Kg
See Table 1 for additional details

42.126
TABLES
Table 1: Summary of Soil Analytical Results

42.127
Lab Results
Sample
Date
Sample
ID
Depth
(inches below ground
surface)
Total Lead Concentrations
(mg/kg)
surface 13.9
18" 5.68
surface 42.5
18" 7.61
surface 183
18" 6.54
surface 208
18" 10.6
surface 8.2
18" 5.74
surface 37.5
18" 9.61
surface 19
18" 15.2
surface 158
18" 5.25
surface 78
18" 7.16
surface 51.6
18" 7.32
surface 33.3
18" 5.06
surface 14.9
18" 7
80 / 320
(160)
Notes:
158
320
Table 1
Summary of Soil Analytical Results
Pogonip Access Trail Evaluation
333 Golf Club Dr. Santa Cruz
= red‐shaded cell indicates detected concentration exceeds the ESL threshold limit for a residential land use
Sample Information
= green‐shaded cell indicates detected concentration exceeds the ESL threshold limit for a residential land use
Environmental Screening Levels (ESLs): Regional Water Quality Control Board (San Francisco Bay Region) guideline document: Screening for Environmental Concerns at Sites With Contaminated Soil and Groundwater (Final version, 2019). The ESLs are intended to provide quantitative risk‐based guidance on whether further assessment or remediation of contamination is warranted <https://www.waterboards.ca.gov/sanfranciscobay/water_issues/programs/ESL/new/ESL_Summary_T ables_24Jan19_Rev1.pdf >
B‐11
Environmental Screening Levels (ESLs)
Residential / Commercial Land Uses
(Construction Worker)
B‐12
March 11, 2021
All soil results are in milligrams per Kilogram (mg/Kg) B‐1
B‐2
B‐3
B‐4
B‐5
B‐6
B‐7
B‐8
B‐9
B‐10
1 of 1 Weber,Hayes and Assoicates 42.128

ATTACHMENT A
Field Documentation
Field Notes and Photo Sheets

42.129
This following provides detailed descriptions of methods used during shallow soil sampling investigations.

Included are specifications for shallow soil sampling with a slide hammer, and decontamination procedures.

Shallow Soil Sampling Procedures: A backhoe, twoperson power auger, or a hand auger will be used to get to a point immediately above the sampling depth.

Once at the desired sampling depth, a slide hammer
will be used to drive a clean stainless-steel liner
encased in the slide hammer sampling shoe to obtain a
relatively undisturbed sample. The slide hammer
consists of a metal rod with one end containing a
sampling shoe and cutting head with which a sample
liner can be installed. At the other end of the metal
rod there is a handle that is constrained on the rod,
but slides up and down the rod allowing force to be
applied to the sampling shoe. Manual operation is
used to slide the handle down the rod to force the sampling shoe equipped with the liner into native soils.

Materials retrieved from the sampler will be logged on an as-needed basis by the experienced field geologist using the Unified Soil Classification System (USCS), noting in particular, the lithology of the soils, moisture content, and any unusual odor or discoloration. The liner and relatively undisturbed soils will then be removed from the sampling shoe. The liner is then protected at both ends with Teflon tape, sealed with non-reactive caps, taped, and immediately stored in an insulated container cooled with blue ice at a temperature of 4 degree Celsius or less. Soil samples selected for Volatile Organic Compound (VOC) analysis may follow field preservation protocols according to EPA Method 5035, as described in DTSC’s Guidance Document for the Implementation of United States Environmental Protection Agency Method 5035: Methodologies for Collection, Preservation, Storage, and Preparation of Soils to be Analyzed for Volatile Organic Compounds, dated November 2004. Selected samples will be transported under appropriate chain-of-custody documentation to a State certified laboratory performing the targeted analysis.

Upon completion of sampling at the designated location, the location will be backfilled and compacted with the materials that were removed prior to sampling, supplemented by clean imported fill as necessary.

Equipment Decontamination and Containerization Procedures: All sampling equipment will be cleaned prior to arriving on site to prevent possible transfer of contamination from another site. Additionally, sampling equipment will be thoroughly cleaned between each sampling run with a Liqui-Nox ® or Alconox ® solution followed by a double rinsing with distilled water to prevent the vertical transfer of contamination, and/or contamination from location to location onsite. Accordingly, all sampling equipment will be cleaned following sampling operations to prevent the possible transfer of contamination to another site.

All cleaning rinsate, and wash water produced during the shallow soil sampling and decontamination process will be containerized on site in D.O.T. approved 55-gallon drums for subsequent profiling and disposal at an approved facility.

42.130
Pogonip - Access Road Sampling
333 Golf Club Drive, Santa Cruz, California
2021-3-11
Hand Auger used to collect samples
Example of Borehole showing shallow groundwater

42.131
Pogonip - Access Road Sampling
333 Golf Club Drive, Santa Cruz, California
2021-3-11
Hand Auger being decontaminated between samples
Collecting Soil from Hand Auger

42.132

42.133

42.134

ATTACHMENT B
State-Certified Analytical Laboratory Results
Soil - Pace Analytical L1326377

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ATTACHMENT C
Previous Testing Results in the Vicinity - RMD, August 2020

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BUILDING COMPLEX 770' 600' 400' 325' 200' POGONIP CLUBHOUSE FORMER HORSE STABLE NORTH ORCHARD NO-1 NO-5 NO-8 NO-10 NO-9 NO-11 NO-12 EM-23EM-13 EM-25 EM-29 EM-30 EM-31 EM-18 EM-32 EM-33 EM-22 EM-28 EM-17 EM-16 EM-27 EM-15 EM-26 EM-14 EM-24 EM-12 EM-19 EM-20 NO-7 NO-2 WM-C-1 WM-C-2 EAST MEADOW B9N B1W B13NB13E B12N B2W B2S B2N B4N B4WB12W B13S B12S B10W B10S B9W B1S B13W B11NB6W B6N B4E B5N B5E B5W B3W B9EB8S B12E B9S B10E B11W B11S B10N B11E B6S B2EB3S B4S B3E B7NB5S B8E B8W B7S B7W B8NB7E B6E B3N B1N B1EWM-DG-3 WM-DG-5 WM-DG-4 WM-DG-2 WM-C-7 WM-C-6 WM-C-8 WM-DG-14 WM-DG-12 WM-C-9(A) WM-DG-15 WM-DG-6 WM-C-10 WM-C-5 WM-C-4 WM-DG-7 WM-DG-8WM-DG-9 WM-DG-10 WM-C-11 NO-3 NO-4 NO-6 EM-1 EM-2 EM-3 EM-4 EM-11 EM-10 EM-9 EM-7 EM-8 EM-5 EM-6 EM-21 WM-DG-11(A) WM-C-3 WM-DG-13 WM-DG-1 PROJECT NO. DATE DRAWN BY: APP. BY: FIGURE 3 LEAD CONCENTRATIONS IN SOIL 333 GOLF CLUB DRIVE SANTA CRUZ, CA 01-DTSC-002 08/05/20 DCB KRN LEGEND 50' WETLAND BUFFER (NO PLANTING) SHOOTING PAD LOCATION 100' WETLAND BUFFER (NATIVE PLANTS) 0 SCALE: 1" = 150' 150 300 PROPOSED PERENNIAL/ORCHARD LAND ANALYTICAL RESULT IN MILLIGRAMS PER KILOGRAM (mg/kg) SOIL SAMPLE LOCATION (RMD, 2020) PROPOSED WEST GARDEN BOUNDARY UNKNOWN CONCRETE PAD PROPOSED EAST GARDEN BOUNDARY APPROXIMATE LOCATION OF SEASONAL WETLAND SOIL SAMPLE LOCATION (EIS, 2019) Notes: 1) Yellow highlighted values exceed the screening level for unrestricted land use. 2) Data shown only for locations with lead concentration exceeding the unrestricted screening level. 3) Hypothetical Ranges of Lead Shot and Clay Pigeons Are Based On Standard Skeet Shooting Range Shot Fall Zones (ITRC, 2015). 4) Proposed Garden Boundaries and Building Complex Based on GPS Coordinate Plan (Fall Creek Engineering, Inc, 2018) and Map of Pogonip Farm & Garden (Homeless Garden Project O&M Plan, 2017). WM-C-1 Depth Lead 0.5 FT 181 2 FT 36.9 WM-C-2 Depth Lead 0.5 FT 182 2 FT 11.1 WM-C-3 Depth Lead 0.5 FT 161 2 FT 23.5 WM-C-4 Depth Lead 0.5 FT 141 2 FT 12.6 WM-DG-1 Depth Lead 0.5 FT 188 2 FT 15.9 WM-DG-7 Depth Lead 0.5 FT 116 2 FT 12.1 WM-DG-13 Depth Lead 1.5 FT 1,230 2 FT 49.0 NO-1 Depth Lead 0.5 FT 265 2 FT 6.55 NO-2 Depth Lead 0.5 FT 107 2 FT 5.58 NO-3 Depth Lead 0.5 FT 690 2 FT 45.3 NO-4 Depth Lead 0.5 FT 180 2 FT 3.97 NO-6 Depth Lead 0.5 FT 144 2 FT 13.9 EM-1 Depth Lead 0.5 FT 138 2 FT 22.1 EM-2 Depth Lead 0.5 FT 182 2 FT 13.4 EM-3 Depth Lead 0.5 FT 203 2 FT 51.3 EM-4 Depth Lead 1.5 FT 164 2 FT 61.3 EM-5 Depth Lead 0.5 FT 115 2 FT 53.6 EM-6 Depth Lead 0.5 FT 264 2 FT 17.9 EM-7 Depth Lead 0.5 FT 752 2 FT 117 EM-8 Depth Lead 1 FT 717 2 FT 140 EM-9 Depth Lead 0.5 FT 1,140 2 FT 81.9 EM-10 Depth Lead 0.5 FT 1,670 2 FT 34.1 EM-11 Depth Lead 0.5 FT 856 2 FT 140 EM-19 Depth Lead 0.5 FT 116 2 FT 38.4 EM-20 Depth Lead 0.5 FT 95.2 2 FT 9.26 EM-21 Depth Lead 0.5 FT 769 2 FT 9.52 EM-22 Depth Lead 0.5 FT 92.6 2 FT 25.9 22.1 PROPOSED ROW CROP ANNUAL PRODUCTION WEST MEADOW 0.5 FT DEPTH IN FEET BELOW GROUND SURFACE 42.160 Table 1
Metals in Soil
Pogonip Farm and Garden
Santa Cruz, California

Page 1 of 2 ends

(feet bgs) (feet bgs) (ppm)
WM-C-1-0.5' 5/13/2020 0 - 0.5 222 1.31 J 2.63 12.3 181 23.9 WM-C-1-2' 5/13/2020 1.5 - 2 54 - - - 36.9 -
WM-C-2-0.5' 5/13/2020 0 - 0.5 202 0.989 J 2.13 J 6.91 182 15.3 WM-C-2-0.5' DUP 5/13/2020 0 - 0.5 202 Duplicate 1.57 J 2.45 7.54 156 13.6 WM-C-2-2' 5/13/2020 1.5 - 2 26 - - - 11.1 -
WM-C-3-0.5' 5/13/2020 0 - 0.5 244 1.23 J 2.14 J 8.38 161 53.6 WM-C-3-2' 5/13/2020 1.5 - 2 13 - - - 23.5 -
WM-C-4-0.5' 5/13/2020 0 - 0.5 368 0.683 J 1.92 J 6.96 141 15 WM-C-4-2' 5/13/2020 1.5 - 2 27 - - - 12.6 -
WM-C-5-0.5' 5/13/2020 0 - 0.5 95 0.568 J 1.58 J 77.7 O1 76.9 O1 78.5 O1 WM-C-6-0.5' 5/14/2020 0 - 0.5 30 0.897 J,J6 2.16 4.92 10.6 19.7 WM-C-7-0.5' 5/14/2020 0 - 0.5 13 0.785 J <2.51 47.3 8.57 59.1 WM-C-8-0.5' 5/14/2020 0 - 0.5 31 0.879 J <2.40 18.1 15.0 31.0 WM-C-9A-1' 5/15/2020 0.5 - 1 105 0.727 J 1.55 J 5.61 71.2 18.6 WM-C-10-0.5' 5/14/2020 0 - 0.5 - 1.65 J 3.81 9.09 27.0 26.6 WM-C-11-0.5' 5/13/2020 0 - 0.5 45 1.47 J 10.7 7.86 29.3 24.3 WM-DG-1-0.5' 5/13/2020 0 - 0.5 241 1.41 J 2.69 8.57 188 16.4 WM-DG-1-2' 5/13/2020 1.5 - 2 9 - - - 15.9 -
WM-DG-2-0.5' 5/13/2020 0 - 0.5 168 <2.42 2.74 10.3 6.16 12.9 WM-DG-3-0.5' 5/13/2020 0 - 0.5 90 0.833 J 1.28 J 5.66 51.1 23.0 WM-DG-4-0.5' 5/13/2020 0 - 0.5 30 <2.42 1.76 J 16.2 19.8 28.3 WM-DG-5-0.5' 5/13/2020 0 - 0.5 19 <2.44 1.53 J 13.9 38.1 23.1 WM-DG-6-0.5' 5/13/2020 0 - 0.5 311 <2.22 2.25 11.0 27.0 18.5 WM-DG-7-0.5' 5/13/2020 0 - 0.5 120 0.721 J 1.77 J 7.01 116 17.0 WM-DG-7-2' 5/13/2020 1.5 - 2 29 - - - 12.1 -
WM-DG-8-0.5' 5/13/2020 0 - 0.5 59 0.637 J 1.43 J 9.12 55.7 21.0 WM-DG-9-0.5' 5/13/2020 0 - 0.5 28 <2.31 1.52 J 299 17.5 91.1 WM-DG-10-0.5' 5/13/2020 0 - 0.5 46 0.640 J 2.78 10.9 28.7 25.0 WM-DG-11-0.5' 5/14/2020 0 - 0.5 59 2.01 J 2.72 B 263 76.0 689 WM-DG-11-0.5'-DUP 5/14/2020 0 - 0.5 59 Duplicate 1.55 J 2.13 B,J 14.9 40.9 75.8 WM-DG-11A-1' 5/15/2020 0.5 - 1 16 <2.20 1.77 J 9.01 11.5 15.6 WM-DG-12-0.5' 5/14/2020 0 - 0.5 64 1.58 J 1.65 B,J 10.8 39.1 51.6 WM-DG-13-1.5' 5/14/2020 1 - 1.5 1,095 41.7 J 15.9 B,J 6,320 1,230 28,500 WM-DG-13-2' 5/14/2020 1.5 - 2 33 3.33 3.61 B 214 49.0 2,770 WM-DG-14-0.5' 5/14/2020 0 - 0.5 19 0.817 J 2.82 B 8.28 13.8 40.8 WM-DG-15-0.5' 5/14/2020 0 - 0.5 23 1.80 J 2.17 B,J 76.9 23.8 303 NO-1-0.5' 5/14/2020 0 - 0.5 225 3.54 3.05 B 6.32 265 24.0 NO-1-2' 5/14/2020 1.5 - 2 25 - - - 6.55 -
NO-2-0.5' 5/14/2020 0 - 0.5 119 1.65 J 1.94 B,J 8.14 107 17.6 NO-2-2' 5/14/2020 1.5 - 2 28 - - - 5.58 -
NO-3-0.5' 5/14/2020 0 - 0.5 863 6.94 4.77 B 11.3 690 21.5 NO-3-2' 5/14/2020 1.5 - 2 35 - - - 45.3 -
NO-4-0.5' 5/14/2020 0 - 0.5 211 2.03 J 1.60 B,J 8.16 180 15.7 NO-4-2' 5/14/2020 1.5 - 2 16 - - - 3.97 -
NO-5-0.5' 5/14/2020 0 - 0.5 10 1.08 J 1.57 B,J 50.8 40.0 44.2 NO-6-0.5' 5/14/2020 0 - 0.5 118 1.97 J 2.32 B,J 23.2 144 41.8 NO-6-2' 5/14/2020 1.5 - 2 14 - - - 13.9 -
NO-7-0.5' 5/14/2020 0 - 0.5 43 0.926 J 1.91 B,J 8.08 29.8 24.8 NO-8-0.5' 5/15/2020 0 - 0.5 31 0.928 J <2.46 18.9 18.5 23.1 NO-9-0.5' 5/14/2020 0 - 0.5 39 1.51 J 1.70 B,J 14.4 20.0 26.7 NO-10-0.5' 5/15/2020 0 - 0.5 17 <2.33 <2.33 18.0 14.0 27.5 NO-11-0.5' 5/15/2020 0 - 0.5 18 1.04 J 0.655 J 15.0 14.5 26.8 NO-12-0.5' 5/15/2020 0 - 0.5 21 0.718 J <2.42 17.1 10.5 49.8 EM-1-0.5' 5/12/2020 0 - 0.5 119 2.34 2.42 63.1 138 69.6 EM-1-2' 5/12/2020 1.5 - 2 39 - - - 22.1 -
EM-2-0.5' 5/12/2020 0 - 0.5 153 1.93 J 2.42 24.6 182 31.0 EM-2-2' 5/12/2020 1.5 - 2 15 - - - 13.4 -
EM-3-0.5' 5/12/2020 0 - 0.5 219 2.87 3.23 16.6 203 20.4 EM-3-2' 5/12/2020 1.5 - 2 24 - - - 51.3 -
EM-4-1.5' 5/12/2020 1 - 1.5 166 5.15 4.58 15.8 164 25.3 EM-4-2' 5/12/2020 1.5 - 2 47 - - - 61.3 -
EM-5-0.5' 5/12/2020 0 - 0.5 139 2.51 3.21 19.1 115 26.4 EM-5-2' 5/12/2020 1.5 - 2 95 - - - 53.6 -
EM-6-0.5' 5/12/2020 0 - 0.5 372 3.46 3.91 19.9 264 28.8 EM-6-2' 5/12/2020 1.5 - 2 83 - - - 17.9 -
EM-7-0.5' 5/12/2020 0 - 0.5 758 17.0 9.58 21.1 752 30.7 EM-7-2' 5/12/2020 1.5 - 2 46 - - - 117 -
EM-8-1' 5/12/2020 0.5 - 1 549 11.8 8.69 14.7 717 31.1
EM-8-2' 5/12/2020 1.5 - 2 94 - - - 140 -
East Meadow
West Meadow

0.5-2
1-2
North Orchard
Commercial Screening Level2 470 0.36 47,000 320
Unrestricted (Residential) Screening Level2 31 0.11 3,100 80 Zinc
(mg/kg) (mg/kg) (mg/kg)
350,000
23,000
Notes Antimony Arsenic Copper Lead
(mg/kg)
Sample ID Date
Sample
Depth
Depth Shot
Observed
XRF
Reading
(mg/kg)
Background Level1 6 11 63 43 140

42.161
Table 1
Metals in Soil
Pogonip Farm and Garden
Santa Cruz, California

Page 2 of 2 ends

(feet bgs) (feet bgs) (ppm)
West Meadow
Commercial Screening Level2 470 0.36 47,000 320
Unrestricted (Residential) Screening Level2 31 0.11 3,100 80 Zinc
(mg/kg) (mg/kg) (mg/kg)
350,000
23,000
Notes Antimony Arsenic Copper Lead
(mg/kg)
Sample ID Date
Sample
Depth
Depth Shot
Observed
XRF
Reading
(mg/kg)
Background Level1 6 11 63 43 140
EM-9-0.5' 5/12/2020 0 - 0.5 1,227 5.46 6.71 10.7 1,140 22.1 EM-9-2' 5/12/2020 1.5 - 2 168 - - - 81.9 -
EM-10-0.5' 5/12/2020 0 - 0.5 2,973 6.07 8.44 12.6 1,670 29.0 EM-10-2' 5/12/2020 1.5 - 2 15 - - - 34.1 -
EM-11-0.5' 5/12/2020 0 - 0.5 569 3.78 7.16 24.4 856 36.2 EM-11-2' 5/12/2020 1.5 - 2 94 - - - 140 -
EM-12-0.5' 5/14/2020 0 - 0.5 31 <2.44 3.04 B 38.6 9.15 98.3 EM-13-0.5' 5/15/2020 0 - 0.5 24 0.815 J 0.554 J 9.98 11.2 25.4 EM-14-0.5' 5/14/2020 0 - 0.5 38 1.58 J 2.92 B 12.5 33.0 44.5 EM-14-0.5'-DUP 5/14/2020 0 - 0.5 38 Duplicate 2.14 J 2.80 B 14.0 32.5 55.3 EM-15-0.5' 5/15/2020 0 - 0.5 26 1.12 J 1.72 J 13.0 16.1 33.0 EM-16-0.5' 5/15/2020 0 - 0.5 42 1.00 J 1.33 J 14.0 24.6 37.3 EM-17-0.5' 5/15/2020 0 - 0.5 47 1.50 J 1.13 J 13.8 40.3 35.0 EM-18-0.5' 5/15/2020 0 - 0.5 39 3.29 2.35 11.2 44.5 30.5 EM-19-0.5' 5/14/2020 0 - 0.5 167 3.13 3.57 B 12.7 116 46.0 EM-19-2' 5/14/2020 1.5 - 2 64 - - - 38.4 -
EM-20-0.5' 5/15/2020 0 - 0.5 58 <2.53 2.07 J 20.5 95.2 33.4 EM-20-2' 5/15/2020 1.5 - 2 10 - - - 9.26 -
EM-21-0.5' 5/14/2020 0 - 0.5 776 10.0 6.12 7.16 768 28.7 EM-21-0.5'-DUP 5/14/2020 0 - 0.5 776 Duplicate 6.85 5.65 B 7.33 769 30.6 EM-21-2' 5/14/2020 1.5 - 2 17 - - - 9.52 -
EM-22-0.5' 5/15/2020 0 - 0.5 100 <2.28 2.39 12.3 92.6 22.8 EM-22-2' 5/15/2020 1.5 - 2 17 - - - 25.9 -
EM-23-0.5' 5/15/2020 0 - 0.5 29 0.932 J 1.24 J 12.8 10.7 26.0 EM-24-0.5' 5/15/2020 0 - 0.5 33 0.886 J 0.686 J 9.50 9.18 26.8 EM-25-0.5' 5/15/2020 0 - 0.5 30 0.786 J 0.810 J 12.2 10.3 28.7 EM-26-0.5' 5/15/2020 0 - 0.5 19 0.656 J 1.02 J 11.7 10.8 25.1 EM-27-0.5' 5/15/2020 0 - 0.5 34 1.02 J 0.823 J 13.6 6.12 26.4 EM-28-0.5' 5/15/2020 0 - 0.5 29 0.813 J 0.865 J 14.4 14.3 31.9 EM-29-0.5' 5/15/2020 0 - 0.5 31 0.720 J 1.02 J 10.8 17.8 36.8 EM-30-0.5' 5/15/2020 0 - 0.5 31 <2.25 2.52 21.9 18.0 24.1 EM-31-0.5' 5/15/2020 0 - 0.5 33 <2.30 2.07 J 9.94 15.4 19.1 EM-32-0.5' 5/15/2020 0 - 0.5 18 <2.34 2.01 J 13.8 37.4 23.0 EM-33-0.5' 5/15/2020 0 - 0.5 17 <2.25 2.23 J 8.74 12.3 19.0 Notes:

Soil samples sieved using No. 10 sieve and metals analyzed using USEPA Method 6010B.

Analytes detected above laboratory reporting limit are emboldened.

Analytes detected above background level and Unrestricted (Residential) Screening Level are highlighted.

Analytes detected above background level and Commercial Screening Level are underlined. bgs = Below ground surface.
mg/kg = Milligrams per kilogram.
- = Not analyzed.

B = The same analyte is found in the associated blank.

J = The identification of the analyte is acceptable; the reported value is an estimate.

J6 = The sample matrix interfered with the ability to make any accurate determination; spike value is low.

O1 = The analyte failed the method required serial dilution test and/or subsequent post-spike criteria. These failures indicate matrix interference.

References:

DTSC, 2020. Human Health Risk Assessment (HHRA) Note Number 3. June.

Duvergé, 2011. Establishing Background Arsenic in Soil of the Urbanized San Francisco Bay Region. December.

LBNL, 2009. Analysis of Background Distributions of Metals in Soil at Lawrence Berkeley National Laboratory. Revised April.

USEPA, 2020. Regional Screening Level (RSL) Summary Table (TR=1E-6, HQ=1). May. 1 Lawrence Berkeley National Laboratory (LBNL, 2009), was used to establish acceptable upper estimate background concentrations for metals with the exception of arsenic. For arsenic, the background level represents the established background level for San Francisco Bay Region of 11 mg/kg (Duvergé, 2011). 2 In order of priority, the screening level represents the Department of Toxic Substances Control (DTSC)-modified screening level (DTSC, 2020) followed by U.S. Environmental Protection Agency (USEPA) Regional Screening Level (RSL; USEPA, 2020).

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APPENDIX B

SOIL SCREENING LEVELS FOR

HYPOTHETICAL RECREATIONAL TRAIL USER RECEPTOR AND

HYPOTHETICAL UNAUTHORIZED CAMPER RECEPTOR

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TABLE OF CONTENTS
PAGE
LIST OF TABLES ........................................................................................................................... ii LIST OF APPENDICES .................................................................................................................. ii B.1.0 SOIL SCREENING LEVELS FOR HYPOTHETICAL RECREATIONAL TRAIL USER RECEPTOR AND HYPOTHETICAL UNAUTHORIZED CAMPER RECEPTOR..................... 1 B.1.1 Lead ....................................................................................................................... 1 B.1.1.1Risk Characterization for Lead.................................................................... 1 B.1.1.2 Screening Levels for Lead.......................................................................... 2 B.1.2 Polycyclic Aromatic Hydrocarbons (PAHs)............................................................. 3 B.1.2.1Risk Characterization for PAHs................................................................... 3 B.1.2.2 Screening Levels for PAHs ......................................................................... 7 B.2.0 SUMMARY ......................................................................................................................... 8 B.3.0 REFERENCES..................................................................................................................... 1

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LIST OF TABLES
Table B-1 Statistical Summary of Shallow Soil (0 to 2 feet bgs) Analytical Data – West Meadow
Table B-2 Exposure Intake Assumptions for Hypothetical Recreational Trail User Receptor Table B-3 Exposure Intake Assumptions for Hypothetical Unauthorized Camper Receptor with an Exposure Frequency of 14 days per year
Table B-4 Exposure Intake Assumptions for Hypothetical Unauthorized Camper Receptor with an Exposure Frequency of 28 days per year
Table B-5 Toxicity Values – Reference Doses/Reference Concentrations Table B-6 Toxicity Values – Slope Factors/Inhalation Unit Risk Factors Table B-7 Total Risk Characterization for the Hypothetical Recreational Trail User Receptor, Direct Exposure to COPCs in Soil (0 to 2 feet bgs) Table B-8 Total Risk Characterization for the Hypothetical Unauthorized Camper Receptor, Direct Exposure to COPCs in Soil (0 to 2 feet bgs) with an Exposure Frequency of 14 days per year
Table B-9 Total Risk Characterization for the Hypothetical Unauthorized Camper Receptor, Direct Exposure to COPCs in Soil (0 to 2 feet bgs) with an Exposure Frequency of 28 days per year

LIST OF APPENDICES
Attachment B1 LeadSpread 8 Worksheets
Attachment B2 Risk Characterization Equations
Attachment B3 ProUCL Output

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B.1.0 SOIL SCREENING LEVELS FOR HYPOTHETICAL RECREATIONAL TRAIL USER

RECEPTOR AND HYPOTHETICAL UNAUTHORIZED CAMPER RECEPTOR
Based on current and anticipated future land use as a recreational area, the recreational trail user receptor and unauthorized camper receptor were included in the conceptual site model (CSM; Section 3.0 of this Report). The recreational trail user is a long-term receptor that may include visitors using the recreational trails and the unauthorized camper receptor is a long-term receptor camping at the Site. Although camping is prohibited at the Site, at the request of the County, the on-Site unauthorized camper receptor was included in the CSM and risk-based screening levels were developed for this receptor. The following exposure pathways were included in the development of soil screening levels (SLs) for lead and polycyclic aromatic hydrocarbons (PAHs):
• Incidental ingestion of soil;
• Dermal contact with soil; and
• Inhalation of dust in outdoor air.

B.1.1 Lead
Unlike other chemicals, toxicokinetic models are used to predict blood lead concentrations to determine if exposure to lead poses adverse noncarcinogenic effects to receptors and to develop soil screening levels (SLs) for lead.

B.1.1.1 Risk Characterization for Lead
The human health screening evaluation (HHSE) for lead for the hypothetical recreational trail user receptor is discussed in Section 5.0 of this Report.

For the hypothetical unauthorized camper receptor, the exposure pathways are incomplete due to the implementation of engineering controls to mitigate unauthorized camping at the Site.

Regardless, as noted in the 2019 Phase I Environmental Site Assessment (Phase I; Weber, Hayes & Associates [WHA], 2019) and during Site visits, unauthorized camp sites have been observed within the ravine area. As discussed in Section 5.1 of this Report, the exposure point concentrations (EPCs) for surface and shallow soil samples collected from the ravine area were 884 milligrams per kilogram (mg/kg) and 170 mg/kg, respectively. These lead EPCs for surface soil and shallow soil do not exceed the unauthorized camper soil SLs of 1,800 mg/kg and 1,080 mg/kg for 14-day and 28-day exposure frequencies, respectively. In the event of

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unauthorized camping within the ravine area, lead does not pose an adverse noncarcinogenic risk to the hypothetical unauthorized camper receptor.

B.1.1.2 Screening Levels for Lead
Neither the U.S. Environmental Protection Agency (USEPA) nor the California Environmental Protection Agency (CalEPA) publishes toxicity values for lead; therefore, blood-lead models are used to predict blood lead concentrations and develop soil SLs for lead. This section describes the blood-lead model used to develop lead soil SLs for the hypothetical recreational trail user receptor and hypothetical unauthorized camper receptor.

DTSC LeadSpread 8 Model
The DTSC LeadSpread 8 model (DTSC, 2011) calculates several blood lead concentrations, including the median, 90th, 95th, 98th, and 99th percentile estimates for the predicted distribution. Additionally, the model calculates the concentration in exterior soil and interior dust that will result in a 90th percentile estimate of blood lead equal to the target increase in children’s blood lead level of concern by 1 microgram per deciliter (µg/dL; CalEPA benchmark incremental change criterion for lead). This target concentration is referred to as “PRG-90”. DTSC LeadSpread 8 addresses child exposures only and is recommended by DTSC for evaluating lead exposure under unrestricted land use. In the model, DTSC indicates that non-residential scenarios may involve fewer than seven days per week for exposure frequency. This model was used to develop soil screening levels for lead for the following non-residential receptors:
• Hypothetical Recreational Trail User Receptor - This receptor is assumed to visit the Site one day per week (52 days per year). Therefore, the exposure frequency in the model is reduced from seven days per week (default) to one day per week. Based on this model, the soil SL for lead is 540 mg/kg.
• Hypothetical Unauthorized Camper Receptor - Since camping is prohibited, the exposure frequency of this receptor is unknown. Based on best professional judgment, two exposure frequencies were considered. For one exposure scenario, this receptor is assumed to camp at the Site for 14 days per year. This is consistent with the Bureau of Land Management (BLM) yearly recreational exposure frequency for a recreational visitor, which includes a range of possible activities including camping (BLM, 2017). For the second exposure scenario, the exposure frequency was doubled to be 28 days per year.

Therefore, the exposure frequency in the model is reduced from seven days per week (default) to 0.3 day per week and 0.5 day per week, which is equivalent to 14 days per

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year and 28 days per year, respectively. Based on this model, the soil SLs for lead are 1,800 mg/kg and 1,080 mg/kg for 14-day and 28-day exposure frequencies, respectively.

The LeadSpread 8 model worksheets for the receptors described above are provided in Attachment B1.

B.1.2 Polycyclic Aromatic Hydrocarbons (PAHs)
Using data from the exposure and toxicity assessments, human noncancer adverse health effects (hazard index [HI]) and excess cancer risks from potential exposure to PAHs in shallow soil (0 to 2 feet below ground surface [bgs]) were estimated. Then, using the HI and excess cancer risk estimates, soil EPCs, and USEPA and CalEPA target HI and excess cancer risk, risk-based soil SLs were estimated for PAHs.

B.1.2.1 Risk Characterization for PAHs
This section summarizes the approach used to estimate noncancer adverse health effects and excess cancer risks from assumed exposure to PAHs in shallow soil. The risk characterization equations for each potentially complete and significant exposure pathway are presented in Attachment B2. The input parameters for the risk characterization equations are summarized below:
• All detected PAHs were retained as chemicals of potential concern (COPCs, Table B-1); • Instead of an average exposure scenario (central tendency exposure [CTE]), an upper-bound exposure scenario was evaluated (otherwise referred to as a reasonable maximum exposure [RME]). The RME scenario assumes mostly conservative upper-bound intake assumptions (e.g., 90th or 95th percentile for nearly all intake assumptions) and upper-bound estimates of chemical concentrations; • Chemical doses were estimated on the basis of a number of intake assumptions, also referred to as exposure factors, including EPCs, exposure frequency, exposure duration, body weight, and other parameters. Consistent with the parameters used for the development of soil SLs for lead, the exposure parameters are as follows:
o Hypothetical Recreational Trail User Receptor – Eight hours a day, one day per week (52 days per year) for a period of 26 years (as both a child [6 years] and an adult [20 years]). Potential exposures for this receptor are expected to occur from time spent outdoors only.

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o Hypothetical Unauthorized Camper Receptor – For this receptor, two potential exposure scenarios were evaluated: (1) 24 hours a day for 14 days per year and (2) 24 hours a day for 28 days per year. Both scenarios are for an exposure period of 26 years (as both a child [6 years] and an adult [20 years]). Potential exposures for this receptor are expected to occur from time spent outdoors only.

The intake assumptions for these receptors are summarized in Tables B-2, B-3, and B-4. • The EPCs are conservative estimates of the chemical concentration in shallow soil. It is unlikely that a potential receptor will spend the entire exposure duration of 26 years residing over maximum detected concentrations in shallow soil. Therefore, it is appropriate to statistically evaluate the shallow soil data on an area-wide basis and consider a 95-percent upper confidence limit of the mean (95UCL) concentration as an appropriate EPC. A USEPA software package, ProUCL Version 5.1, was used to estimate the upper confidence limit of the mean concentration (UCL; [typically the 95UCL, but sometimes the 97.5UCL or 99UCL, depending on the data set]). The ProUCL output spreadsheets are presented in Attachment B3. Consistent with USEPA (1989) procedures, the lesser of the maximum detected concentration and the 95UCL was selected as shallow soil EPCs. The soil EPCs for PAHs are presented on Table B-1. • Toxicity values are combined with exposure factors to estimate adverse noncancer health effects and excess cancer risks. Toxicity values include oral reference doses (RfDs), inhalation reference concentrations (RfCs), oral slope factors (SFs), and inhalation unit risk factors (IURs). Toxicity values were selected in accordance with Toxicity Criteria for Human Health Risk Assessments, Screening Levels, and Remediation Goals rule (Health and Safety Code [HSC] §25300 et seq., “Chapter 6.8”; Toxicity Criteria Rule) and DTSC (2019) Note Number 10. The toxicity values are presented on Tables B-5 and B-6.

The parameters described above were used in risk characterization equations (Attachment B2) to estimate noncancer HI and excess cancer risks as described in the following sections.

Noncancer Adverse Health Effects – Hazard Quotient and Hazard Index Noncarcinogenic effects are typically evaluated by comparing an exposure level over a specified time period, with an RfD or RfC based on a similar time period. To estimate noncancer effects, the intake is divided by the RfD or RfC. The resulting value is referred to as a hazard quotient (HQ).

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Exposures to multiple chemicals were evaluated by summing the HQs for each chemical for each exposure pathway to estimate the HI, using the following equation:

𝐻𝐼! = $𝐻𝑄",!
$
"%&
Where:

HIp = HI for the receptor’s exposure to n chemicals via pathway p (unitless); n = Number of chemicals (i.e., detected PAHs); and
HQi,p = HQ for chemical i for exposure pathway p (unitless).

A HI less than or equal to one indicates that no adverse noncancer health effects are expected to occur (USEPA, 1989). Consistent with methods used by USEPA (2021), the HI presented for the receptors is based on the child receptor, which is higher than the HI for the corresponding adult receptor. This is conservative because it assumes higher daily intake rates, lower body weight, and chronic toxicity values. The summation of HIs across age groups (i.e., child and adult) is inappropriate because noncancer hazard is not cumulative over time, as is assumed for cancer risk (USEPA, 2021).

Excess Cancer Risk
SFs/IURs were used to estimate the potential excess cancer risk associated with exposure to individual COPCs. Consistent with USEPA (1989) risk assessment guidelines, the SF/IUR was multiplied by the chronic daily intake averaged over 70 years to estimate lifetime excess cancer risk. The resulting values are referred to as excess cancer risks. These potential excess cancer risks are compared to CalEPA’s risk management range of 1 x 10-6 to 1 x 10-4. The CalEPA threshold value of one-in-one million (1 x 10-6) represents the lower end (most stringent) of the CalEPA’s risk management range and is the point of departure for risk management decisions for the receptors.

The potential cancer risks from exposure to multiple chemicals were then estimated by summing the excess cancer risks for each chemical for a given exposure pathway using the following equation:

𝐶𝑅! = $𝐶𝑅",!
$
"%&
Where:

CRp = Excess cancer risk for the receptor’s exposure to n chemicals via pathway p (unitless); n = Number of chemicals (i.e., detected PAHs); and
CRi,p = Excess cancer risk for chemical i for exposure pathway p (unitless).

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Consistent with methods used by USEPA (2021), the excess cancer risk estimates for the receptors are the sum of the excess cancer risk estimates for the child and adult receptors.

The results of this risk characterization process for the hypothetical recreational trail user receptor are presented on Table B-7 and summarized in the following table:

Media Exposure Pathway Hazard Index
(HI)
Cancer Risk
(CR)
Comments
Shallow Soil
(0 to 2 feet bgs)
Direct Exposure
-Ingestion
-Dermal Contact
-Inhalation of Dust

0.05 4 x 10-6 HI does not exceed target level of 1.

CR exceeds target level of 1 x 10-6.

Individual HIs for all COPCs do not
exceed 1 (see Table B-7).

Individual CRs for all COPCs do not
exceed 1 x 10-6 (see Table B-7).

The HI does not exceed the USEPA and CalEPA target level of one; therefore, PAHs do not pose adverse noncancer effects to the hypothetical recreational trail user receptor. The excess cancer risk is within CalEPA’s risk management range of 1 x 10-6 to 1 x 10-4. The individual excess cancer risks for PAHs do not exceed 1 x 10-6. Benzo(a)pyrene and dibenz(a,h)anthracene are the primary contributors to the excess cancer risk, each with an estimated cancer risk of 1 x 10-6. They account for 63% of the total excess cancer risk. Individual excess cancer risks for all other PAHs are less than 1 x 10-6.

The results of this risk characterization process for the hypothetical unauthorized camper receptor are presented on Tables B-8 and B-9 and summarized in the following table:

Media Exposure Pathway Hazard Index
(HI)
Cancer Risk
(CR)
Comments
Shallow Soil
(0 to 2 feet bgs)
Direct Exposure
-Ingestion
-Dermal Contact
-Inhalation of Dust
(Exposure frequency
of 14 days per year)

0.01 1 x 10-6 HI does not exceed target level of 1.

CR does not exceed target level of
1 x 10-6.

Individual HIs for all COPCs do not
exceed 1 (see Table B-8).

Individual CRs for all COPCs do not
exceed 1 x 10-6 (see Table B-8).

Shallow Soil
(0 to 2 feet bgs)
Direct Exposure
-Ingestion
-Dermal Contact
-Inhalation of Dust
(Exposure frequency
of 28 days per year)

0.02 2 x 10-6 HI does not exceed target level of 1.

CR exceeds target level of 1 x 10-6.

Individual HIs for all COPCs do not
exceed 1 (see Table B-9).

Individual CRs for all COPCs do not
exceed 1 x 10-6 (see Table B-9).

The HIs do not exceed the USEPA and CalEPA target level of one; therefore, PAHs do not pose adverse noncancer effects to the hypothetical recreational trail user receptor and hypothetical

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unauthorized camper receptor. The excess cancer risk is within CalEPA’s risk management range of 1 x 10-6 to 1 x 10-4. The individual excess cancer risks for PAHs do not exceed 1 x 10-6.

B.1.2.2 Screening Levels for PAHs
Using the HI and excess cancer risk estimates, source EPCs, and USEPA and CalEPA target HI of one and target excess cancer risk of 1 x 10-6, a soil SL was estimated using the equations in the following sections.

Soil SL – Noncarcinogenic Effects
𝑆𝑜𝑖𝑙 𝑆𝐿$' = 𝐻𝐼( × 𝐸𝑃𝐶",!
𝐻𝐼",!
Where:

Soil SLnc= Soil SL for noncarcinogenic effects for chemical i via pathway p (mg/kg); HIT = Target HI of one (unitless);
EPCi,p = Exposure point concentration for soil for chemical i via pathway p (mg/kg); and HIi,p = HI for chemical i via pathway p (unitless).

Soil SL – Carcinogenic Effects
𝑆𝑜𝑖𝑙 𝑆𝐿' = 𝐶𝑅( × 𝐸𝑃𝐶",!
𝐶𝑅",!
Where:

Soil SLnc= Soil SL for carcinogenic effects for chemical i via pathway p (mg/kg); CRT = Target excess cancer risk of 1 x 10-6 (unitless); EPCi,p = Exposure point concentration for soil for chemical i via pathway p (mg/kg); and CRi,p = Excess cancer risk for chemical i via pathway p (unitless).

The recreation trail user soil SLs for PAHs are presented on Table B-7. The unauthorized camper soil SLs for PAHs under the two exposure scenarios (i.e., exposure frequencies of 14 days per year and 28 days per year) are presented on Tables B-8 and B-9.

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B.2.0 SUMMARY
Based on current and anticipated future land use in the Lower Main Meadow, Pogonip Open Space as a recreational area, the recreational trail user receptor and the unauthorized camper receptor were included in the CSM, and risk-based screening levels were developed.

Exposures to lead are evaluated separately from other COPCs by using toxicokinetic models to predict blood lead concentrations and soil SLs. The HHSE for lead for the hypothetical recreational trail user receptor is discussed in Section 5.0 of this Report. For the hypothetical unauthorized camper receptor, lead EPCs for surface soil and shallow soil in the ravine area do not exceed the unauthorized camper soil SLs of 1,800 mg/kg and 1,080 mg/kg for 14-day and 28-day exposure frequencies, respectively. In the event of unauthorized camping within the ravine area, lead does not pose an adverse noncarcinogenic risk to the hypothetical unauthorized camper receptor.

Based on the evaluation of potential human health risks to the recreational trail user receptor and the unauthorized camper receptor from exposure to PAHs, the HIs do not exceed the USEPA and CalEPA target level of one and the excess cancer risks are within CalEPA’s risk management range of 1 x 10-6 to 1 x 10-4. The individual excess cancer risks for PAHs detected in soil do not exceed 1 x 10-6.

Since there are no published soil SLs for recreational receptors, Site-specific risk-based soil SLs were developed for use at the Site. The soil SLs for lead and PAHs detected in shallow soil at the Site are summarized in the following table.

COPC
Soil Screening Levels (mg/kg)
Recreational Trail
User Receptor Unauthorized Camper Receptor
Primary Exposure
Assumptions
8 hours/day
52 days/year
26 years (adult/child)
24 hours/day
14 days/year,
26 years (adult/child)
24 hours/day
28 days/year
26 years (adult/child)
Lead 540 1,800 1,080
Anthracene 120,000 430,000 220,000
Acenaphthene 23,000 87,000 43,000
Benz(a)anthracene 45 170 84
Benzo(a)pyrene 4.5 17.0 8.4
Benzo(b)fluoranthene 45 170 84

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COPC
Soil Screening Levels (mg/kg)
Recreational Trail
User Receptor Unauthorized Camper Receptor
Primary Exposure
Assumptions
8 hours/day
52 days/year
26 years (adult/child)
24 hours/day
14 days/year,
26 years (adult/child)
24 hours/day
28 days/year
26 years (adult/child)
Benzo(g,h,i)perylene NE NE NE
Benzo(k)fluoranthene 450 1,700 840
Chrysene 4,500 17,000 8,400
Dibenz(a,h)anthracene 1.1 4.1 2.1
Fluoranthene NE NE NE
Fluorene 16,000 58,000 29,000
Indeno(1,2,3-
c,d)pyrene 45 170 84
Phenanthrene NE NE NE
Pyrene 12,000 43,000 22,000
Naphthalene 38 140 70
1-Methylnaphthalene 160 580 290
2-Methylnaphthalene 1,600 5,800 2,900
Notes:

NE = No toxicity values are available; therefore, risk-based screening level was not estimated.

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B.3.0 REFERENCES
Bureau of Land Management (BLM), 2017. BLM Technical Memorandum, Screening Assessment Approaches for Metals in Soil at BLM HazMat/AML Sites. September 2017 Update.

Department of Toxic Substances Control (DTSC), 2011. User’s Guide to LeadSpread 8 and Recommendations for Evaluation of Lead Exposures in Adults. Department of Toxic Substances Control. September.

DTSC, 2019. Human Health Risk Assessment Note Number 10: Required Toxicity Criteria under sections 69021(a), (b), and (c) of the Toxicity Criteria for Human Health Risk Assessments, Screening Levels, and Remediation Goals Rule and Specification of DTSC-Recommended Toxicity Criteria for Other Analytes Evaluated in Human Health Risk Assessments, Screening-Levels, and Remediation-Goal Calculations. February 25.

U.S. Environmental Protection Agency (USEPA), 1989. Risk Assessment Guidance for Superfund, Human Health Evaluation Manual, Part A. Interim Final. Solid Waste and Emergency Response. December.

USEPA, 2021. Regional Screening Level (RSL) Summary Table (TR=1E-6, HQ=1). May.

Weber, Hayes & Associates (WHA), 2019. Phase I Environmental Site Assessment for Recreational Open Space Property. November 19.

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TABLES

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Table B-1
Statistical Summary of Shallow Soil (0 to 2 feet bgs) Analytical Data - West Meadow Lower Main Meadow Pogonip Open Space
Chemical
Number
of
Samples
Number
of
Detections
Frequency
of
Detection
Arithmetic
Mean
of
Detected
Standard
Deviation
of
Detected
Minimum
Detected
Concentration
Maximum
Detected
Concentration 95UCL 1 Soil EPC 2
(mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg)
Polynuclear Aromatic Hydrocarbons (PAHs)
Anthracene 31 12 39% 0.20 0.30 0.00491 0.986 0.21 0.21
Acenaphthene 31 10 32% 0.13 0.20 0.00499 0.651 0.13 0.13 Benz(a)anthracene 31 23 74% 1.4 2.6 0.00212 8.45 3.6 3.6 Benzo(a)pyrene 31 26 84% 1.8 3.7 0.00239 11.7 7.7 7.7
Benzo(b)fluoranthene 31 29 94% 1.9 4.1 0.00244 14.8 9.0 9.0 Benzo(g,h,i)perylene 31 25 81% 1.0 1.9 0.00215 7.52 1.9 1.9 Benzo(k)fluoranthene 31 18 58% 0.85 1.4 0.00264 4.02 1.8 1.8 Chrysene 31 21 68% 1.9 3.2 0.00297 9.86 4.5 4.5
Dibenz(a,h)anthracene 31 15 48% 0.71 1.3 0.00377 4.45 1.0 1.0 Fluoranthene 31 21 68% 1.6 2.9 0.00273 11.1 3.9 3.9
Fluorene 31 9 29% 0.054 0.086 0.00249 0.260 0.053 0.053 Indeno(1,2,3-c,d)pyrene 31 21 68% 1.1 1.9 0.00213 6.25 1.7 1.7 Phenanthrene 31 14 45% 0.68 1.2 0.00295 4.14 0.90 0.90
Pyrene 31 22 71% 1.5 3.0 0.00280 11.8 2.7 2.7
Naphthalene 31 9 29% 0.57 1.5 0.00491 4.68 1.2 1.2
1-Methylnaphthalene 31 5 16% 0.026 0.028 0.0106 0.0762 0.028 0.028 2-Methylnaphthalene 31 5 16% 0.037 0.041 0.0133 0.110 0.038 0.038 Notes:
95UCL = 95 Percent Upper Confidence Limit of the Arithmetic Mean.

EPC = Exposure point concentration.
mg/kg = Milligrams per kilogram.

References:

USEPA. 1989. Risk Assessment Guidance for Superfund, Human Health Evaluation Manual, Part A. Interim Final. Solid Waste and Emergency Response. December. 501 Golf Club Drive, Santa Cruz, California
1 A U.S. Environmental Protection Agency (USEPA) software package, ProUCL Version 5.1, was used to estimate the upper confidence limit of the mean concentration (UCL; [typically the 95UCL, but sometimes the 97.5UCL or 99UCL, depending on the data set]). 2 Consistent with USEPA (1989) procedures, when evaluating a reasonable maximum exposure scenario the lesser of the maximum detected concentration and the 95UCL was selected as the appropriate soil EPC for comparison with the screening level.

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Table B-2
Exposure Intake Assumptions for Hypothetical Recreational Trail User Receptor 1 Lower Main Meadow Pogonip Open Space
Parameter Acronym Value Unit Source
Target Cancer Risk TR 1.00E-06 Unitless DTSC, 2019
Target Hazard Index THI 1 Unitless DTSC, 2019
Child
Averaging Time (carcinogens)2 ATc 25,550 days DTSC, 2019 Averaging Time (noncarcinogens) ATn 2,190 days DTSC, 2019 Exposure Duration ED 6 years BPJ3
Exposure Frequency EF 52 days/year BPJ4
Exposure Time ET 8 hours/day BPJ5
Body Weight BW 15 kg DTSC, 2019
Soil Ingestion Rate IRs 200 mg/day DTSC, 2019
Skin Surface Area SA 2,373 cm2 DTSC, 2019
Soil Adherence Factor AF 0.2 mg/cm2-day DTSC, 2019
Dermal Absorption Factor 6 ABS 0.15 unitless DTSC, 2019 Particulate Emission Factor 7 PEF 1.32E+09 m3/kg DTSC, 2019 Adult
Averaging Time (carcinogens)2 ATc 25,550 days DTSC, 2019 Averaging Time (noncarcinogens) ATn 7,300 days DTSC, 2019 Exposure Duration ED 20 years BPJ3
Exposure Frequency EF 52 day/year BPJ4
Exposure Time ET 8 hours/day BPJ5
Body Weight BW 80 kg DTSC, 2019
Soil Ingestion Rate IRs 100 mg/day DTSC, 2019
Skin Surface Area SA 6,032 cm2 DTSC, 2019
Soil Adherence Factor AF 0.07 mg/cm2-day DTSC, 2019
Dermal Absorption Factor 6 ABS 0.15 unitless DTSC, 2019 Particulate Emission Factor 7 PEF 1.32E+09 m3/kg DTSC, 2019 Notes:
kg = kilograms. mg/cm2-day = milligrams per square centimeter per day. mg/day = milligrams per day. m3/kg = cubic meters per kilogram. cm2 = square centimeters.
2 Based on a 70 year lifetime.
3 Best professional judgment. Recreational receptor is expected to spend time as both a child and adult recreator receptor over a lifetime. 4 Best professional judgment. Recreational receptor was assumed to visit one day per week. 5 Best professional judgment. Recreational receptor was assumed to visit 8 hours a day.

References:
501 Golf Club Drive, Santa Cruz, California
6 In accordance with DTSC (2015), the dermal absorption fraction for polynuclear aromatic hydrocarbons can be assumed to be 0.15.

DTSC. 2015. Preliminary Endangerment Assessment Guidance Manual. Department of Toxic Substances Control. October.

DTSC. 2019. Human Health Risk Assessment Note Number 1, Recommended DTSC Default Exposure Factors for Use in Risk Assessment at California Hazardous Waste Sites and Permitted Facilities. April 9. 1 Hypothetical recreational trail user receptor includes visitors and trespassers, which are expected to spend entire exposure duration outdoors.
7 In the absence of a PEF for the recreational scenario, the PEF was assumed to be the same value used for residential and industrial scenarios (DTSC, 2019).

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Table B-3
Exposure Intake Assumptions for Hypothetical Camper Receptor with an Exposure Frequency of 14 days per year
1 Lower Main Meadow Pogonip Open Space
Parameter Acronym Value Unit Source
Target Cancer Risk TR 1.00E-06 Unitless DTSC, 2019
Target Hazard Index THI 1 Unitless DTSC, 2019
Child
Averaging Time (carcinogens)2 ATc 25,550 days DTSC, 2019 Averaging Time (noncarcinogens) ATn 2,190 days DTSC, 2019 Exposure Duration ED 6 years BPJ3
Exposure Frequency EF 14 days/year BLM, 20174
Exposure Time ET 24 hours/day BPJ5
Body Weight BW 15 kg DTSC, 2019
Soil Ingestion Rate IRs 200 mg/day DTSC, 2019
Skin Surface Area SA 2,373 cm2 DTSC, 2019
Soil Adherence Factor AF 0.2 mg/cm2-day DTSC, 2019
Dermal Absorption Factor 6 ABS 0.15 unitless DTSC, 2019 Particulate Emission Factor 7 PEF 1.32E+09 m3/kg DTSC, 2019 Adult
Averaging Time (carcinogens)2 ATc 25,550 days DTSC, 2019 Averaging Time (noncarcinogens) ATn 7,300 days DTSC, 2019 Exposure Duration ED 20 years BPJ3
Exposure Frequency EF 14 day/year BLM, 20174
Exposure Time ET 24 hours/day BPJ5
Body Weight BW 80 kg DTSC, 2019
Soil Ingestion Rate IRs 100 mg/day DTSC, 2019
Skin Surface Area SA 6,032 cm2 DTSC, 2019
Soil Adherence Factor AF 0.07 mg/cm2-day DTSC, 2019
Dermal Absorption Factor 6 ABS 0.15 unitless DTSC, 2019 Particulate Emission Factor 7 PEF 1.32E+09 m3/kg DTSC, 2019 Notes:
kg = kilograms. mg/cm2-day = milligrams per square centimeter per day. mg/day = milligrams per day. m3/kg = cubic meters per kilogram. cm2 = square centimeters.
2 Based on a 70 year lifetime.
3 Best professional judgment. Recreational receptor is expected to spend time as both a child and adult recreator receptor over a lifetime. 5 Best professional judgment. Recreational receptor was assumed to camp at the site 24 hours a day.

References:

DTSC. 2015. Preliminary Endangerment Assessment Guidance Manual. Department of Toxic Substances Control. October.

DTSC. 2019. Human Health Risk Assessment Note Number 1, Recommended DTSC Default Exposure Factors for Use in Risk Assessment at California Hazardous Waste Sites and Permitted Facilities. April 9. 501 Golf Club Drive, Santa Cruz, California
1 Hypothetical camper receptor are expected to spend entire exposure duration outdoors. 4 In accordance with the Bureau of Land Management (BLM) yearly recreational exposure frequency for recreational visitor, which includes a range of possible activities, including camping (BLM, 2017). 6 In accordance with DTSC (2015), the dermal absorption fraction for polynuclear aromatic hydrocarbons can be assumed to be 0.15. 7 In the absence of a PEF for the recreational scenario, the PEF was assumed to be the same value used for residential and industrial scenarios (DTSC, 2019).

BLM. 2017. BLM Technical Memorandum, Screening Assessment Approaches for Metals in Soil at BLM HazMat/AML Sites.

September 2017 Update.

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Table B-4
Exposure Intake Assumptions for Hypothetical Camper Receptor with an Exposure Frequency of 28 days per year
1 Lower Main Meadow Pogonip Open Space
Parameter Acronym Value Unit Source
Target Cancer Risk TR 1.00E-06 Unitless DTSC, 2019
Target Hazard Index THI 1 Unitless DTSC, 2019
Child
Averaging Time (carcinogens)2 ATc 25,550 days DTSC, 2019 Averaging Time (noncarcinogens) ATn 2,190 days DTSC, 2019 Exposure Duration ED 6 years BPJ3
Exposure Frequency EF 28 days/year BPJ4
Exposure Time ET 24 hours/day BPJ5
Body Weight BW 15 kg DTSC, 2019
Soil Ingestion Rate IRs 200 mg/day DTSC, 2019
Skin Surface Area SA 2,373 cm2 DTSC, 2019
Soil Adherence Factor AF 0.2 mg/cm2-day DTSC, 2019
Dermal Absorption Factor 6 ABS 0.15 unitless DTSC, 2019 Particulate Emission Factor 7 PEF 1.32E+09 m3/kg DTSC, 2019 Adult
Averaging Time (carcinogens)2 ATc 25,550 days DTSC, 2019 Averaging Time (noncarcinogens) ATn 7,300 days DTSC, 2019 Exposure Duration ED 20 years BPJ3
Exposure Frequency EF 28 day/year BPJ4
Exposure Time ET 24 hours/day BPJ5
Body Weight BW 80 kg DTSC, 2019
Soil Ingestion Rate IRs 100 mg/day DTSC, 2019
Skin Surface Area SA 6,032 cm2 DTSC, 2019
Soil Adherence Factor AF 0.07 mg/cm2-day DTSC, 2019
Dermal Absorption Factor 6 ABS 0.15 unitless DTSC, 2019 Particulate Emission Factor 7 PEF 1.32E+09 m3/kg DTSC, 2019 Notes:
kg = kilograms. mg/cm2-day = milligrams per square centimeter per day. mg/day = milligrams per day. m3/kg = cubic meters per kilogram. cm2 = square centimeters.
2 Based on a 70 year lifetime.
3 Best professional judgment. Recreational receptor is expected to spend time as both a child and adult recreator receptor over a lifetime. 5 Best professional judgment. Recreational receptor was assumed to camp at the site 24 hours a day.

References:

DTSC. 2019. Human Health Risk Assessment Note Number 1, Recommended DTSC Default Exposure Factors for Use in Risk Assessment at California Hazardous Waste Sites and Permitted Facilities. April 9.

BLM. 2017. BLM Technical Memorandum, Screening Assessment Approaches for Metals in Soil at BLM HazMat/AML Sites.

September 2017 Update.
4 Best professional judgment. As an upperbound evaluation, the Bureau of Land Management (BLM) yearly recreational exposure frequency for recreational visitor of 14 days per year (BLM, 2017) was doubled to 24 days per year. 501 Golf Club Drive, Santa Cruz, California
1 Hypothetical camper receptor are expected to spend entire exposure duration outdoors. 6 In accordance with DTSC (2015), the dermal absorption fraction for polynuclear aromatic hydrocarbons can be assumed to be 0.15. 7 In the absence of a PEF for the recreational scenario, the PEF was assumed to be the same value used for residential and industrial scenarios (DTSC, 2019).

DTSC. 2015. Preliminary Endangerment Assessment Guidance Manual. Department of Toxic Substances Control. October.

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Inhalation Reference Concentration (RfC)
Value
Target Organ(s)/
System(s) Source Value Source Value
Target Organ(s)/
System(s) Source
(mg/kg-day) (unitless) (µg/m3
)
Polycyclic Aromatic Hydrocarbons
Anthracene 3.0E-01 None USEPA, 2021 1 USEPA, 2004 1.2E+03 RTR USEPA, 2021 Acenaphthene 6.0E-02 Liver USEPA, 2021 1 USEPA, 2004 2.4E+02 RTR USEPA, 2021 Benz(a)anthracene - - - - - - 1 USEPA, 2004 - - - - - - Benzo(a)pyrene 3.0E-04 Developmental USEPA, 2021 1 USEPA, 2004 2.0E-03 Developmental USEPA, 2021 Benzo(b)fluoranthene - - - - - - 1 USEPA, 2004 - - - - - - Benzo(g,h,i)perylene - - - - - - 1 USEPA, 2004 - - - - - - Benzo(k)fluoranthene - - - - - - 1 USEPA, 2004 - - - - - - Chrysene - - - - - - 1 USEPA, 2004 - - - - - -
Dibenz(a,h)anthracene - - - - - - 1 USEPA, 2004 - - - - - - Fluoranthene 4.0E-02 Liver, Blood USEPA, 2021 1 USEPA, 2004 - - - - - - Fluorene 4.0E-02 Blood USEPA, 2021 1 USEPA, 2004 1.6E+02 RTR USEPA, 2021 Indeno(1,2,3-c,d)pyrene - - - - - - 1 USEPA, 2004 - - - - - - Phenanthrene - - - - - - 1 USEPA, 2004 - - - - - -
Pyrene 3.0E-02 Kidney USEPA, 2021 1 USEPA, 2004 1.2E+02 RTR USEPA, 2021 Naphthalene 2.0E-02 Other (body weight) USEPA, 2021 1 USEPA, 2004 3.0E+00 Nervous, Respiratory USEPA, 2021 1-Methylnaphthalene 7.0E-02 Respiratory ATSDR, 2021 1 USEPA, 2004 2.8E+02 RTR ATSDR, 2021 2-Methylnaphthalene 4.0E-03 Respiratory USEPA, 2021 1 USEPA, 2004 1.6E+01 RTR USEPA, 2021 Notes:

GIABS = Gastrointestinal absorption factor. RTR = route to route extrapolation. mg/kg-day = milligrams per kilogram body weight per day. - - = not available. µg/m3 = micrograms per cubic meter.
2 In the absence of dermal toxicity values the oral reference doses were multiplied by the gastrointestinal absorption (GIABS) factor and used to evaluate dermal exposure.

References:

ATSDR. 2021. Minimal Risk Levels (MRLs). August.

USEPA. 2021. Integrated Risk Information System (IRIS). On-line computer database. Last accessed September.

Table B-5
Toxicity Values - Reference Doses/Reference Concentrations1 Lower Main Meadow Pogonip Open Space
501 Golf Club Drive, Santa Cruz, California
Oral Reference Dose (RfD)
2 GIABS
Chemical
1 Toxicity values were selected in accordance with Toxicity Criteria for Human Health Risk Assessments, Screening Levels, and Remediation Goals rule and DTSC (2019) Note Number 10.

DTSC. 2019. Human Health Risk Assessment Note Number 10: Required Toxicity Criteria under sections 69021(a), (b), and (c) of the Toxicity Criteria for Human Health Risk Assessments, Screening Levels, and Remediation Goals Rule and Specification of DTSC-Recommended Toxicity Criteria for Other Analytes Evaluated in Human Health Risk Assessments, Screening-Levels, and Remediation-Goal Calculations. February 25.

USEPA. 2004. Risk Assessment Guidance for Superfund Volume I: Human Health Evaluation Manual (Part E, Supplemental Guidance for Dermal Risk Assessment). Final.

Office of Superfund Remediation and Technology Innovation. July.

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Table B-6
Toxicity Values - Slope Factors/Inhalation Unit Risk Factors1 Inhalation Unit Risk Factor (IUR)
Value
(mg/kg-day)-1
Source Value
(unitless)
Source Value
(µg/m3)
-1
Source
Polycyclic Aromatic Hydrocarbons
Anthracene - - - - 1 USEPA, 2004 - - - -
Acenaphthene - - - - 1 USEPA, 2004 - - - -
Benz(a)anthracene 1.0E-01 USEPA, 2021a 1 USEPA, 2004 1.1E-04 OEHHA, 2021 Benzo(a)pyrene 1.0E+00 USEPA, 2021c 1 USEPA, 2004 1.1E-03 OEHHA, 2021 Benzo(b)fluoranthene 1.0E-01 USEPA, 2021a 1 USEPA, 2004 1.1E-04 OEHHA, 2021 Benzo(g,h,i)perylene - - - - 1 USEPA, 2004 - - - -
Benzo(k)fluoranthene 1.0E-02 USEPA, 2021a 1 USEPA, 2004 1.1E-04 OEHHA, 2021 Chrysene 1.0E-03 USEPA, 2021a 1 USEPA, 2004 1.1E-05 OEHHA, 2021 Dibenz(a,h)anthracene 4.1E+00 OEHHA, 2021 1 USEPA, 2004 1.2E-03 OEHHA, 2021 Fluoranthene - - - - 1 USEPA, 2004 - - - -
Fluorene - - - - 1 USEPA, 2004 - - - -
Indeno(1,2,3-c,d)pyrene 1.0E-01 USEPA, 2021a 1 USEPA, 2004 1.1E-04 OEHHA, 2021 Phenanthrene - - - - 1 USEPA, 2004 - - - -
Pyrene - - - - 1 USEPA, 2004 - - - -
Naphthalene 1.2E-01 OEHHA, 2021 1 USEPA, 2004 3.4E-05 OEHHA, 2021 1-Methylnaphthalene 2.9E-02 USEPA, 2021b 1 USEPA, 2004 7.3E-06 (RTR) USEPA, 2021b 2-Methylnaphthalene - - - - 1 USEPA, 2004 - - - -
Notes:

GIABS = Gastrointestinal absorption factor. µg/m3 = micrograms per cubic meter. mg/kg-day = milligrams per kilogram body weight per day. - - = not available. 2 In the absence of dermal toxicity values the oral slope factors were divided by the gastrointestinal absorption (GIABS) factor and used to evaluate dermal exposure.

References:

OEHHA. 2021. Toxicity Criteria Database. On-line computer database. Last accessed September.

USEPA. 2021a. Regional Screening Level (RSL) Summary Table (TR=1E-6, HQ=1). May USEPA. 2021b. Provisional Peer-Reviewed Toxicity Values (PPRTV). On-line computer database. Last accessed September.

USEPA. 2021c. Integrated Risk Information System (IRIS). On-line computer database. Last accessed September.

USEPA. 2004. Risk Assessment Guidance for Superfund Volume I: Human Health Evaluation Manual (Part E, Supplemental Guidance for Dermal Risk Assessment). Final.

Office of Superfund Remediation and Technology Innovation. July.

Lower Main Meadow Pogonip Open Space
501 Golf Club Drive, Santa Cruz, California
Chemical Oral Slope Factor (SF)
2 GIABS
1 Toxicity values were selected in accordance with Toxicity Criteria for Human Health Risk Assessments, Screening Levels, and Remediation Goals rule and DTSC (2019) Note Number 10.

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Noncarcinogenic Effects Carcinogenic Effects
Exposure
Point
Concentration
(Csoil)
Chronic
Oral
Reference
Dose
(cRfDo)
Chronic
Inhalation
Reference
Concentration
(cRfCi)
Hazard
Quotient (HQ)
Oral
Slope Factor
(SFo)
Inhalation
Unit Risk
Factor
(URF)
Excess
Cancer Risk
Noncarcinogenic
Effects1
Carcinogenic
Effects2 Soil SL1
(mg/kg) (mg/kg-day) (µg/m3
) (unitless) (mg/kg-day)-1 (µg/m3)
-1 (unitless) (mg/kg) (mg/kg) (mg/kg)
Child Resident Receptor
Polycyclic Aromatic Hydrocarbons
Anthracene 2.04E-01 3.00E-01 1.20E+03 2 E-06 - - - - - - 1.2E+05 - - 1.2E+05 Acenaphthene 1.24E-01 6.00E-02 2.40E+02 5 E-06 - - - - - - 2.3E+04 - - 2.3E+04 Benz(a)anthracene 3.51E+00 - - - - - - 1.00E-01 1.10E-04 8 E-08 - - 4.5E+01 4.5E+01 Benzo(a)pyrene 5.28E+00 3.00E-04 2.00E-03 5 E-02 1.00E+00 1.10E-03 1 E-06 1.2E+02 4.5E+00 4.5E+00 Benzo(b)fluoranthene 8.74E+00 - - - - - - 1.00E-01 1.10E-04 2 E-07 - - 4.5E+01 4.5E+01 Benzo(g,h,i)perylene 2.73E+00 - - - - - - - - - - - - - - - - - - Benzo(k)fluoranthene 1.72E+00 - - - - - - 1.00E-02 1.10E-04 4 E-09 - - 4.5E+02 4.5E+02 Chrysene 4.33E+00 - - - - - - 1.00E-03 1.10E-05 1 E-09 - - 4.5E+03 4.5E+03 Dibenz(a,h)anthracene 1.37E+00 - - - - - - 4.10E+00 1.20E-03 1 E-06 - - 1.1E+00 1.1E+00 Fluoranthene 3.81E+00 4.00E-02 - - 2 E-04 - - - - - - - - - - - - Fluorene 5.09E-02 4.00E-02 1.60E+02 3 E-06 - - - - - - 1.6E+04 - - 1.6E+04 Indeno(1,2,3-c,d)pyrene 2.50E+00 - - - - - - 1.00E-01 1.10E-04 6 E-08 - - 4.5E+01 4.5E+01 Phenanthrene 8.72E-01 - - - - - - - - - - - - - - - - - - Pyrene 3.95E+00 3.00E-02 1.20E+02 3 E-04 - - - - - - 1.2E+04 - - 1.2E+04 Naphthalene 1.12E+00 2.00E-02 3.00E+00 1 E-04 1.20E-01 3.40E-05 3 E-08 7.8E+03 3.8E+01 3.8E+01 1-Methylnaphthalene 2.77E-02 7.00E-02 2.80E+02 1 E-06 2.90E-02 7.25E-06 2 E-10 2.7E+04 1.6E+02 1.6E+02 2-Methylnaphthalene 3.72E-02 4.00E-03 1.60E+01 2 E-05 - - - - - - 1.6E+03 - - 1.6E+03 Adult Resident Receptor
Polycyclic Aromatic Hydrocarbons
Anthracene 2.04E-01 3.00E-01 1.20E+03 2 E-07 - - - - - - 1.0E+06 - - 1.0E+06 Acenaphthene 1.24E-01 6.00E-02 2.40E+02 6 E-07 - - - - - - 2.1E+05 - - 2.1E+05 Benz(a)anthracene 3.51E+00 - - - - - - 1.00E-01 1.10E-04 3 E-08 - - 1.2E+02 1.2E+02 Benzo(a)pyrene 5.28E+00 3.00E-04 2.00E-03 5 E-03 1.00E+00 1.10E-03 4 E-07 1.0E+03 1.2E+01 1.2E+01 Benzo(b)fluoranthene 8.74E+00 - - - - - - 1.00E-01 1.10E-04 7 E-08 - - 1.2E+02 1.2E+02 Benzo(g,h,i)perylene 2.73E+00 - - - - - - - - - - - - - - - - - - Benzo(k)fluoranthene 1.72E+00 - - - - - - 1.00E-02 1.10E-04 1 E-09 - - 1.2E+03 1.2E+03 Chrysene 4.33E+00 - - - - - - 1.00E-03 1.10E-05 4 E-10 - - 1.2E+04 1.2E+04 Dibenz(a,h)anthracene 1.37E+00 - - - - - - 4.10E+00 1.20E-03 5 E-07 - - 2.9E+00 2.9E+00 Fluoranthene 3.81E+00 4.00E-02 - - 3 E-05 - - - - - - - - - - - - Fluorene 5.09E-02 4.00E-02 1.60E+02 4 E-07 - - - - - - 1.4E+05 - - 1.4E+05 Indeno(1,2,3-c,d)pyrene 2.50E+00 - - - - - - 1.00E-01 1.10E-04 2 E-08 - - 1.2E+02 1.2E+02 Phenanthrene 8.72E-01 - - - - - - - - - - - - - - - - - - Pyrene 3.95E+00 3.00E-02 1.20E+02 4 E-05 - - - - - - 1.0E+05 - - 1.0E+05 Naphthalene 1.12E+00 2.00E-02 3.00E+00 2 E-05 1.20E-01 3.40E-05 1 E-08 6.9E+04 1.0E+02 1.0E+02 1-Methylnaphthalene 2.77E-02 7.00E-02 2.80E+02 1 E-07 2.90E-02 7.25E-06 7 E-11 2.4E+05 4.1E+02 4.1E+02 2-Methylnaphthalene 3.72E-02 4.00E-03 1.60E+01 3 E-06 - - - - - - 1.4E+04 - - 1.4E+04 Total Hazard Index = 5 E-02 Total Excess Cancer Risk = 4 E-06 Notes: 2 E-06
mg/kg = milligrams per kilogram. 6.32 E-01
mg/kg-day = milligrams per kilogram body weight per day. µg/m3 = micrograms per cubic meter.
- - = not available or not applicable. No toxicity values are available; therefore, value was not estimated 1 Soil SL represents the lower of the SLs based on noncarcinogenic and carcinogenic effects. 2 Consistent with methods used by USEPA, the HI presented for the hypothetical recreational trail user receptor is based on the child receptor. 1 Consistent with methods used by USEPA, the excess cancer risk estimates for the hypothetical recreational trail user receptor are the sum of the excess cancer risk estimates for the child and adult receptors.

Chemical of
Potential Concern
Risk-Based Soil Screening Level (SL)
Table B-7
Total Risk Characterization for the Hypothetical Recreational Trail User Receptor Direct Exposure to COPCs in Soil (0 to 2 feet bgs)
Lower Main Meadow Pogonip Open Space
501 Golf Club Drive, Santa Cruz, California

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Noncarcinogenic Effects Carcinogenic Effects
Exposure
Point
Concentration
(Csoil)
Chronic
Oral
Reference
Dose
(cRfDo)
Chronic
Inhalation
Reference
Concentration
(cRfCi)
Hazard
Quotient (HQ)
Oral
Slope Factor
(SFo)
Inhalation
Unit Risk
Factor
(URF)
Excess
Cancer Risk
Noncarcinogenic
Effects1
Carcinogenic
Effects2 Soil SL1
(mg/kg) (mg/kg-day) (µg/m3
) (unitless) (mg/kg-day)-1 (µg/m3)
-1 (unitless) (mg/kg) (mg/kg) (mg/kg)
Child Resident Receptor
Polycyclic Aromatic Hydrocarbons
Anthracene 2.04E-01 3.00E-01 1.20E+03 5 E-07 - - - - - - 4.3E+05 - - 4.3E+05 Acenaphthene 1.24E-01 6.00E-02 2.40E+02 1 E-06 - - - - - - 8.7E+04 - - 8.7E+04 Benz(a)anthracene 3.51E+00 - - - - - - 1.00E-01 1.10E-04 2 E-08 - - 1.7E+02 1.7E+02 Benzo(a)pyrene 5.28E+00 3.00E-04 2.00E-03 1 E-02 1.00E+00 1.10E-03 3 E-07 4.3E+02 1.7E+01 1.7E+01 Benzo(b)fluoranthene 8.74E+00 - - - - - - 1.00E-01 1.10E-04 5 E-08 - - 1.7E+02 1.7E+02 Benzo(g,h,i)perylene 2.73E+00 - - - - - - - - - - - - - - - - - - Benzo(k)fluoranthene 1.72E+00 - - - - - - 1.00E-02 1.10E-04 1 E-09 - - 1.7E+03 1.7E+03 Chrysene 4.33E+00 - - - - - - 1.00E-03 1.10E-05 3 E-10 - - 1.7E+04 1.7E+04 Dibenz(a,h)anthracene 1.37E+00 - - - - - - 4.10E+00 1.20E-03 3 E-07 - - 4.1E+00 4.1E+00 Fluoranthene 3.81E+00 4.00E-02 - - 7 E-05 - - - - - - - - - - - - Fluorene 5.09E-02 4.00E-02 1.60E+02 9 E-07 - - - - - - 5.8E+04 - - 5.8E+04 Indeno(1,2,3-c,d)pyrene 2.50E+00 - - - - - - 1.00E-01 1.10E-04 1 E-08 - - 1.7E+02 1.7E+02 Phenanthrene 8.72E-01 - - - - - - - - - - - - - - - - - - Pyrene 3.95E+00 3.00E-02 1.20E+02 9 E-05 - - - - - - 4.3E+04 - - 4.3E+04 Naphthalene 1.12E+00 2.00E-02 3.00E+00 4 E-05 1.20E-01 3.40E-05 8 E-09 2.9E+04 1.4E+02 1.4E+02 1-Methylnaphthalene 2.77E-02 7.00E-02 2.80E+02 3 E-07 2.90E-02 7.25E-06 5 E-11 1.0E+05 5.8E+02 5.8E+02 2-Methylnaphthalene 3.72E-02 4.00E-03 1.60E+01 6 E-06 - - - - - - 5.8E+03 - - 5.8E+03 Adult Resident Receptor
Polycyclic Aromatic Hydrocarbons
Anthracene 2.04E-01 3.00E-01 1.20E+03 5 E-08 - - - - - - 3.8E+06 - - 3.8E+06 Acenaphthene 1.24E-01 6.00E-02 2.40E+02 2 E-07 - - - - - - 7.7E+05 - - 7.7E+05 Benz(a)anthracene 3.51E+00 - - - - - - 1.00E-01 1.10E-04 8 E-09 - - 4.5E+02 4.5E+02 Benzo(a)pyrene 5.28E+00 3.00E-04 2.00E-03 1 E-03 1.00E+00 1.10E-03 1 E-07 3.6E+03 4.5E+01 4.5E+01 Benzo(b)fluoranthene 8.74E+00 - - - - - - 1.00E-01 1.10E-04 2 E-08 - - 4.5E+02 4.5E+02 Benzo(g,h,i)perylene 2.73E+00 - - - - - - - - - - - - - - - - - - Benzo(k)fluoranthene 1.72E+00 - - - - - - 1.00E-02 1.10E-04 4 E-10 - - 4.5E+03 4.5E+03 Chrysene 4.33E+00 - - - - - - 1.00E-03 1.10E-05 1 E-10 - - 4.5E+04 4.5E+04 Dibenz(a,h)anthracene 1.37E+00 - - - - - - 4.10E+00 1.20E-03 1 E-07 - - 1.1E+01 1.1E+01 Fluoranthene 3.81E+00 4.00E-02 - - 7 E-06 - - - - - - - - - - - - Fluorene 5.09E-02 4.00E-02 1.60E+02 1 E-07 - - - - - - 5.1E+05 - - 5.1E+05 Indeno(1,2,3-c,d)pyrene 2.50E+00 - - - - - - 1.00E-01 1.10E-04 6 E-09 - - 4.5E+02 4.5E+02 Phenanthrene 8.72E-01 - - - - - - - - - - - - - - - - - - Pyrene 3.95E+00 3.00E-02 1.20E+02 1 E-05 - - - - - - 3.8E+05 - - 3.8E+05 Naphthalene 1.12E+00 2.00E-02 3.00E+00 4 E-06 1.20E-01 3.40E-05 3 E-09 2.5E+05 3.7E+02 3.7E+02 1-Methylnaphthalene 2.77E-02 7.00E-02 2.80E+02 3 E-08 2.90E-02 7.25E-06 2 E-11 8.9E+05 1.5E+03 1.5E+03 2-Methylnaphthalene 3.72E-02 4.00E-03 1.60E+01 7 E-07 - - - - - - 5.1E+04 - - 5.1E+04 Total Hazard Index = 1 E-02 Total Excess Cancer Risk = 1 E-06 Notes: 6 E-07
mg/kg = milligrams per kilogram. 6.32 E-01
mg/kg-day = milligrams per kilogram body weight per day. µg/m3 = micrograms per cubic meter.
- - = not available or not applicable. No toxicity values are available; therefore, value was not estimated 1 Soil SL represents the lower of the SLs based on noncarcinogenic and carcinogenic effects. 2 Consistent with methods used by USEPA, the HI presented for the hypothetical recreational trail user receptor is based on the child receptor. 1 Consistent with methods used by USEPA, the excess cancer risk estimates for the hypothetical recreational trail user receptor are the sum of the excess cancer risk estimates for the child and adult receptors.

Chemical of
Potential Concern
Table B-8
Total Risk Characterization for the Hypothetical Camper Receptor Direct Exposure to COPCs in Soil (0 to 2 feet bgs) with an Exposure Frequency of 14 days per year Lower Main Meadow Pogonip Open Space
501 Golf Club Drive, Santa Cruz, California
Risk-Based Soil Screening Level (SL)

42.184

Page 1 of 1 ends

Noncarcinogenic Effects Carcinogenic Effects
Exposure
Point
Concentration
(Csoil)
Chronic
Oral
Reference
Dose
(cRfDo)
Chronic
Inhalation
Reference
Concentration
(cRfCi)
Hazard
Quotient (HQ)
Oral
Slope Factor
(SFo)
Inhalation
Unit Risk
Factor
(URF)
Excess
Cancer Risk
Noncarcinogenic
Effects1
Carcinogenic
Effects2 Soil SL1
(mg/kg) (mg/kg-day) (µg/m3
) (unitless) (mg/kg-day)-1 (µg/m3)
-1 (unitless) (mg/kg) (mg/kg) (mg/kg)
Child Resident Receptor
Polycyclic Aromatic Hydrocarbons
Anthracene 2.04E-01 3.00E-01 1.20E+03 9 E-07 - - - - - - 2.2E+05 - - 2.2E+05 Acenaphthene 1.24E-01 6.00E-02 2.40E+02 3 E-06 - - - - - - 4.3E+04 - - 4.3E+04 Benz(a)anthracene 3.51E+00 - - - - - - 1.00E-01 1.10E-04 4 E-08 - - 8.4E+01 8.4E+01 Benzo(a)pyrene 5.28E+00 3.00E-04 2.00E-03 2 E-02 1.00E+00 1.10E-03 6 E-07 2.1E+02 8.4E+00 8.4E+00 Benzo(b)fluoranthene 8.74E+00 - - - - - - 1.00E-01 1.10E-04 1 E-07 - - 8.4E+01 8.4E+01 Benzo(g,h,i)perylene 2.73E+00 - - - - - - - - - - - - - - - - - - Benzo(k)fluoranthene 1.72E+00 - - - - - - 1.00E-02 1.10E-04 2 E-09 - - 8.4E+02 8.4E+02 Chrysene 4.33E+00 - - - - - - 1.00E-03 1.10E-05 5 E-10 - - 8.4E+03 8.4E+03 Dibenz(a,h)anthracene 1.37E+00 - - - - - - 4.10E+00 1.20E-03 7 E-07 - - 2.1E+00 2.1E+00 Fluoranthene 3.81E+00 4.00E-02 - - 1 E-04 - - - - - - - - - - - - Fluorene 5.09E-02 4.00E-02 1.60E+02 2 E-06 - - - - - - 2.9E+04 - - 2.9E+04 Indeno(1,2,3-c,d)pyrene 2.50E+00 - - - - - - 1.00E-01 1.10E-04 3 E-08 - - 8.4E+01 8.4E+01 Phenanthrene 8.72E-01 - - - - - - - - - - - - - - - - - - Pyrene 3.95E+00 3.00E-02 1.20E+02 2 E-04 - - - - - - 2.2E+04 - - 2.2E+04 Naphthalene 1.12E+00 2.00E-02 3.00E+00 8 E-05 1.20E-01 3.40E-05 2 E-08 1.4E+04 7.0E+01 7.0E+01 1-Methylnaphthalene 2.77E-02 7.00E-02 2.80E+02 5 E-07 2.90E-02 7.25E-06 1 E-10 5.0E+04 2.9E+02 2.9E+02 2-Methylnaphthalene 3.72E-02 4.00E-03 1.60E+01 1 E-05 - - - - - - 2.9E+03 - - 2.9E+03 Adult Resident Receptor
Polycyclic Aromatic Hydrocarbons
Anthracene 2.04E-01 3.00E-01 1.20E+03 1 E-07 - - - - - - 1.9E+06 - - 1.9E+06 Acenaphthene 1.24E-01 6.00E-02 2.40E+02 3 E-07 - - - - - - 3.8E+05 - - 3.8E+05 Benz(a)anthracene 3.51E+00 - - - - - - 1.00E-01 1.10E-04 2 E-08 - - 2.2E+02 2.2E+02 Benzo(a)pyrene 5.28E+00 3.00E-04 2.00E-03 3 E-03 1.00E+00 1.10E-03 2 E-07 1.8E+03 2.2E+01 2.2E+01 Benzo(b)fluoranthene 8.74E+00 - - - - - - 1.00E-01 1.10E-04 4 E-08 - - 2.2E+02 2.2E+02 Benzo(g,h,i)perylene 2.73E+00 - - - - - - - - - - - - - - - - - - Benzo(k)fluoranthene 1.72E+00 - - - - - - 1.00E-02 1.10E-04 8 E-10 - - 2.2E+03 2.2E+03 Chrysene 4.33E+00 - - - - - - 1.00E-03 1.10E-05 2 E-10 - - 2.2E+04 2.2E+04 Dibenz(a,h)anthracene 1.37E+00 - - - - - - 4.10E+00 1.20E-03 3 E-07 - - 5.5E+00 5.5E+00 Fluoranthene 3.81E+00 4.00E-02 - - 1 E-05 - - - - - - - - - - - - Fluorene 5.09E-02 4.00E-02 1.60E+02 2 E-07 - - - - - - 2.6E+05 - - 2.6E+05 Indeno(1,2,3-c,d)pyrene 2.50E+00 - - - - - - 1.00E-01 1.10E-04 1 E-08 - - 2.2E+02 2.2E+02 Phenanthrene 8.72E-01 - - - - - - - - - - - - - - - - - - Pyrene 3.95E+00 3.00E-02 1.20E+02 2 E-05 - - - - - - 1.9E+05 - - 1.9E+05 Naphthalene 1.12E+00 2.00E-02 3.00E+00 9 E-06 1.20E-01 3.40E-05 6 E-09 1.3E+05 1.9E+02 1.9E+02 1-Methylnaphthalene 2.77E-02 7.00E-02 2.80E+02 6 E-08 2.90E-02 7.25E-06 4 E-11 4.5E+05 7.7E+02 7.7E+02 2-Methylnaphthalene 3.72E-02 4.00E-03 1.60E+01 1 E-06 - - - - - - 2.6E+04 - - 2.6E+04 Total Hazard Index = 2 E-02 Total Excess Cancer Risk = 2 E-06 Notes: 1 E-06
mg/kg = milligrams per kilogram. 6.32 E-01
mg/kg-day = milligrams per kilogram body weight per day. µg/m3 = micrograms per cubic meter.
- - = not available or not applicable. No toxicity values are available; therefore, value was not estimated 1 Soil SL represents the lower of the SLs based on noncarcinogenic and carcinogenic effects. 2 Consistent with methods used by USEPA, the HI presented for the hypothetical recreational trail user receptor is based on the child receptor. 1 Consistent with methods used by USEPA, the excess cancer risk estimates for the hypothetical recreational trail user receptor are the sum of the excess cancer risk estimates for the child and adult receptors.

Chemical of
Potential Concern
Table B-9
Total Risk Characterization for the Hypothetical Camper Receptor Direct Exposure to COPCs in Soil (0 to 2 feet bgs) with an Exposure Frequency of 28 days per year Lower Main Meadow Pogonip Open Space
501 Golf Club Drive, Santa Cruz, California
Risk-Based Soil Screening Level (SL)

42.185
ATTACHMENT B1
LEADSPREAD 8 WORKSHEETS

42.186

INPUT OUTPUT
MEDIUM LEVEL Percentile Estimate of Blood Pb (ug/dl) PRG-90 Lead in Soil/Dust (ug/g) 540 50th 90th 95th 98th 99th (ug/g) Respirable Dust (ug/m3) 1.5 BLOOD Pb, CHILD 0.5 1.0 1.2 1.4 1.6 540 BLOOD Pb, PICA CHILD 1.1 2.0 2.4 2.9 3.3 271
units
Days per week days/wk
Geometric Standard Deviation PEF ug/dl percent PEF ug/dl percent Blood lead level of concern (ug/dl) Soil Contact 8.3E-6 0.00 1% 0.00 0% Skin area, residential cm2 Soil Ingestion 1.0E-3 0.54 99% 2.0E-3 1.09 100% Soil adherence ug/cm2 Inhalation 2.8E-7 0.00 0% 0.00 0% Dermal uptake constant (ug/dl)/(ug/day)
Soil ingestion mg/day
Soil ingestion, pica mg/day
Ingestion constant (ug/dl)/(ug/day)
Bioavailability unitless
Breathing rate m3/day
Inhalation constant (ug/dl)/(ug/day)
Click here for REFERENCES
Hypothetical Camper Receptor
EF = Exposure Frequency = 52 days per year (BLM, 2017)

0.44 6.8

0.192
Recreational trail user receptor was assumed to visit one day per week.

LeadSpread 8 for the Hypothetical Recreational Trail User Receptor 2900
200

0.0001
100
200

0.16 1 Pathway contribution Pathway contribution

1.6 Pathway
1 LEAD RISK ASSESSMENT SPREADSHEET 8

CALIFORNIA DEPARTMENT OF TOXIC SUBSTANCES CONTROL
Click here for ABBREVIATED INSTRUCTIONS FOR LEADSPREAD 8

EXPOSURE PARAMETERS PATHWAYS
children CHILDREN typical with pica
𝐷𝑎𝑦𝑠 𝑝𝑒𝑟 𝑤𝑒𝑒𝑘 = 𝐸𝐹 (𝑑𝑎𝑦𝑠⁄𝑦𝑒𝑎𝑟)
52 (𝑤𝑒𝑒𝑘𝑠⁄𝑦𝑒𝑎𝑟)

42.187

INPUT OUTPUT
MEDIUM LEVEL Percentile Estimate of Blood Pb (ug/dl) PRG-90 Lead in Soil/Dust (ug/g) 1800 50th 90th 95th 98th 99th (ug/g) Respirable Dust (ug/m3) 1.5 BLOOD Pb, CHILD 0.5 1.0 1.2 1.4 1.6 1799 BLOOD Pb, PICA CHILD 1.1 2.0 2.4 2.9 3.3 903
units
Days per week days/wk
Geometric Standard Deviation PEF ug/dl percent PEF ug/dl percent Blood lead level of concern (ug/dl) Soil Contact 2.5E-6 0.00 1% 0.00 0% Skin area, residential cm2 Soil Ingestion 3.0E-4 0.54 99% 6.0E-4 1.09 100% Soil adherence ug/cm2 Inhalation 8.4E-8 0.00 0% 0.00 0% Dermal uptake constant (ug/dl)/(ug/day)
Soil ingestion mg/day
Soil ingestion, pica mg/day
Ingestion constant (ug/dl)/(ug/day)
Bioavailability unitless
Breathing rate m3/day
Inhalation constant (ug/dl)/(ug/day)
Click here for REFERENCES
Hypothetical Camper Receptor
EF = Exposure Frequency = 14 days per year (BLM, 2017)
Reference:

0.44 6.8

0.192
In accordance with the Bureau of Land Management (BLM) yearly recreational exposure frequency for recreational visitor, which includes a range of possible activities, including campling (BLM, 2017).

BLM. 2017. BLM Technical Memorandum, Screening Assessment Approaches for Metals in Soil at BLM HazMat/AML Sites. September 2017 Update.

LeadSpread 8 for the Hypothetical Unauthorized Camper Receptor 2900
200

0.0001
Pathway contribution
LEAD RISK ASSESSMENT SPREADSHEET 8

CALIFORNIA DEPARTMENT OF TOXIC SUBSTANCES CONTROL
Click here for ABBREVIATED INSTRUCTIONS FOR LEADSPREAD 8

EXPOSURE PARAMETERS PATHWAYS
children CHILDREN typical with pica
with an Exposure Frequency of 14 days per year
100
200

0.16 0.3 Pathway contribution

1.6 Pathway
1 𝐷𝑎𝑦𝑠 𝑝𝑒𝑟 𝑤𝑒𝑒𝑘 = 𝐸𝐹 (𝑑𝑎𝑦𝑠⁄𝑦𝑒𝑎𝑟)
52 (𝑤𝑒𝑒𝑘𝑠⁄𝑦𝑒𝑎𝑟)

42.188

INPUT OUTPUT
MEDIUM LEVEL Percentile Estimate of Blood Pb (ug/dl) PRG-90 Lead in Soil/Dust (ug/g) 1080 50th 90th 95th 98th 99th (ug/g) Respirable Dust (ug/m3) 1.5 BLOOD Pb, CHILD 0.5 1.0 1.2 1.4 1.6 1079 BLOOD Pb, PICA CHILD 1.1 2.0 2.4 2.9 3.3 542
units
Days per week days/wk
Geometric Standard Deviation PEF ug/dl percent PEF ug/dl percent Blood lead level of concern (ug/dl) Soil Contact 4.1E-6 0.00 1% 0.00 0% Skin area, residential cm2 Soil Ingestion 5.0E-4 0.54 99% 1.0E-3 1.09 100% Soil adherence ug/cm2 Inhalation 1.4E-7 0.00 0% 0.00 0% Dermal uptake constant (ug/dl)/(ug/day)
Soil ingestion mg/day
Soil ingestion, pica mg/day
Ingestion constant (ug/dl)/(ug/day)
Bioavailability unitless
Breathing rate m3/day
Inhalation constant (ug/dl)/(ug/day)
Click here for REFERENCES
Hypothetical Camper Receptor
EF = Exposure Frequency = 14 days per year (BLM, 2017)
Reference:

0.44 6.8

0.192
As an upperbound evaluation, the Bureau of Land Management (BLM) yearly recreational exposure frequency for recreational visitor of 14 days per year (BLM, 2017) was doubled to 24 days per year.

BLM. 2017. BLM Technical Memorandum, Screening Assessment Approaches for Metals in Soil at BLM HazMat/AML Sites. September 2017 Update.

LeadSpread 8 for the Hypothetical Unauthorized Camper Receptor - Upper Bound Exposure 2900
200

0.0001
Pathway contribution
LEAD RISK ASSESSMENT SPREADSHEET 8

CALIFORNIA DEPARTMENT OF TOXIC SUBSTANCES CONTROL
Click here for ABBREVIATED INSTRUCTIONS FOR LEADSPREAD 8

EXPOSURE PARAMETERS PATHWAYS
children CHILDREN typical with pica
with an Exposure Frequency of 28 days per year
100
200

0.16 0.5 Pathway contribution

1.6 Pathway
1 𝐷𝑎𝑦𝑠 𝑝𝑒𝑟 𝑤𝑒𝑒𝑘 = 𝐸𝐹 (𝑑𝑎𝑦𝑠⁄𝑦𝑒𝑎𝑟)
52 (𝑤𝑒𝑒𝑘𝑠⁄𝑦𝑒𝑎𝑟)

42.189
ATTACHMENT B2

RISK CHARACTERIZATION EQUATIONS

42.190
Risk Characterization Equations for Direct Exposure to COPCs in Soil Noncarcinogenic Effects
Incidental Ingestion of Soil
𝐻𝑎𝑧𝑎𝑟𝑑 𝑄𝑢𝑜𝑡𝑖𝑒𝑛𝑡 =
𝐸𝑃𝐶!"#$ × 𝐸𝐹 × 𝐸𝐷 × 5 1
𝑅𝑓𝐷9 × 5 𝐼𝑅𝑠
10% 𝑚𝑔⁄𝑘𝑔9
𝐵𝑊 × 𝐴𝑇𝑛
Dermal Contact with Soil
𝐻𝑎𝑧𝑎𝑟𝑑 𝑄𝑢𝑜𝑡𝑖𝑒𝑛𝑡 =
𝐸𝑃𝐶!"#$ × 𝐸𝐹 × 𝐸𝐷 × 5 1
𝑅𝑓𝐷 × 𝐺𝐼𝐴𝐵𝑆9 × 5
𝑆𝐴 × 𝐴𝐹 × 𝐴𝐵𝑆
10% 𝑚𝑔⁄𝑘𝑔 9
𝐵𝑊 × 𝐴𝑇𝑛
Inhalation of Fugitive Dust in Outdoor Air from Soil
𝐻𝑎𝑧𝑎𝑟𝑑 𝑄𝑢𝑜𝑡𝑖𝑒𝑛𝑡 =
𝐸𝑃𝐶!"#$ × 𝐸𝐹 × 𝐸𝐷 × 𝐸𝑇 ×
1 𝑑𝑎𝑦
24 ℎ𝑜𝑢𝑟𝑠
× 5 1
𝑅𝑓𝐶 × 0.001 𝑚𝑔⁄µ𝑔9 × M 1
𝑃𝐸𝐹N
𝐴𝑇𝑛
Carcinogenic Effects
Incidental Ingestion of Soil
𝐸𝑥𝑐𝑒𝑠𝑠 𝐶𝑎𝑛𝑐𝑒𝑟 𝑅𝑖𝑠𝑘 =
𝐸𝑃𝐶!"#$ × 𝐸𝐹 × 𝐸𝐷 × 𝑆𝐹 × 5 𝐼𝑅𝑠
10% 𝑚𝑔⁄𝑘𝑔9
𝐵𝑊 × 𝐴𝑇𝑐
Dermal Contact with Soil
𝐸𝑥𝑐𝑒𝑠𝑠 𝐶𝑎𝑛𝑐𝑒𝑟 𝑅𝑖𝑠𝑘 =
𝐸𝑃𝐶!"#$ × 𝐸𝐹 × 𝐸𝐷 × M 𝑆𝐹
𝐺𝐼𝐴𝐵𝑆N × 5
𝑆𝐴 × 𝐴𝐹 × 𝐴𝐵𝑆
10% 𝑚𝑔⁄𝑘𝑔 9
𝐵𝑊 × 𝐴𝑇𝑐
Inhalation of Fugitive Dust in Outdoor Air from Soil
𝐸𝑥𝑐𝑒𝑠𝑠 𝐶𝑎𝑛𝑐𝑒𝑟 𝑅𝑖𝑠𝑘 =
𝐸𝑃𝐶!"#$ × 𝐸𝐹 × 𝐸𝐷 × 𝐸𝑇 ×
1 𝑑𝑎𝑦
24 ℎ𝑜𝑢𝑟𝑠
× 5 𝐼𝑈𝑅

0.001 𝑚𝑔⁄µ𝑔9 × M 1
𝑃𝐸𝐹N
𝐴𝑇𝑐

42.191
Definitions
EPCsoil = Exposure Point Concentration for Shallow Soil (mg/kg) ATc = Averaging Time – Carcinogens (days)
ATn = Averaging Time – Noncarcinogens (days)
EF = Exposure Frequency (days/year)
ED = Exposure Duration (year)
ET = Exposure Time (hours/day)
BW = Body Weight (kg)
IRs = Soil Ingestion Rate (mg/day)
SA = Skin Surface Area (cm2
)
AF = Soil Adherence Factor (mg/cm2
-day)
ABS = Dermal Absorption Factor (unitless)
PEF = Particulate Emission Factor (m3
/kg)
RfD = Oral Reference Dose (mg/kg-day)
RfC = Inhalation Reference Concentration (µg/m3
)
SF = Oral Slope Factor (mg/kg-day)-1
IUR = Inhalation Unit Risk Factor (µg/m3)
-1
GIABS = Gastrointestinal absorption factor (unitless)

42.192
ATTACHMENT B3

PROUCL OUTPUT

42.193
ProUCL Output for Polycyclic Aromatic Hydrocarbons (PAHs) in Soil Lower Main Meadow Pogonip Open Space
501 Golf Club Drive, Santa Cruz, California

Page 1 of 34 ends

Number of Detects 12 Number of Non-Detects 19
Number of Distinct Detects 12 Number of Distinct Non-Detects 19 General Statistics
Total Number of Observations 31 Number of Distinct Observations 31

ANTHRACENE
Median Detects 0.0794 CV Detects 1.446
Skewness Detects 2.056 Kurtosis Detects 4.243
Variance Detects 0.087 Percent Non-Detects 61.29%
Mean Detects 0.204 SD Detects 0.295
Minimum Detect 0.00491 Minimum Non-Detect 0.00639
Maximum Detect 0.986 Maximum Non-Detect 0.00752
Lilliefors Test Statistic 0.269 Lilliefors GOF Test
5% Lilliefors Critical Value 0.243 Detected Data Not Normal at 5% Significance Level Normal GOF Test on Detects Only
Shapiro Wilk Test Statistic 0.716 Shapiro Wilk GOF Test 5% Shapiro Wilk Critical Value 0.859 Detected Data Not Normal at 5% Significance Level Mean of Logged Detects -2.74 SD of Logged Detects 1.775 95% KM (z) UCL 0.144 95% KM Bootstrap t UCL 0.247
90% KM Chebyshev UCL 0.195 95% KM Chebyshev UCL 0.246
KM SD 0.201 95% KM (BCA) UCL 0.154
95% KM (t) UCL 0.146 95% KM (Percentile Bootstrap) UCL 0.145 Detected Data Not Normal at 5% Significance Level
Kaplan-Meier (KM) Statistics using Normal Critical Values and other Nonparametric UCLs KM Mean 0.0824 KM Standard Error of Mean 0.0376
K-S Test Statistic 0.234 Kolmogorov-Smirnov GOF
5% K-S Critical Value 0.258 Detected data appear Gamma Distributed at 5% Significance Level Gamma GOF Tests on Detected Observations Only
A-D Test Statistic 0.414 Anderson-Darling GOF Test
5% A-D Critical Value 0.781 Detected data appear Gamma Distributed at 5% Significance Level

97.5% KM Chebyshev UCL 0.317 99% KM Chebyshev UCL 0.457 Mean (detects) 0.204
Theta hat (MLE) 0.375 Theta star (bias corrected MLE) 0.44 nu hat (MLE) 13.08 nu star (bias corrected) 11.14
Detected data appear Gamma Distributed at 5% Significance Level Gamma Statistics on Detected Data Only
k hat (MLE) 0.545 k star (bias corrected MLE) 0.464
Maximum 0.986 Median 0.01
SD 0.203 CV 2.383
For gamma distributed detected data, BTVs and UCLs may be computed using gamma distribution on KM estimates Minimum 0.00491 Mean 0.0851
Gamma ROS Statistics using Imputed Non-Detects
GROS may not be used when data set has > 50% NDs with many tied observations at multiple DLs GROS may not be used when kstar of detects is small such as <1.0, especially when the sample size is small (e.g., <15-20) For such situations, GROS method may yield incorrect values of UCLs and BTVs This is especially true when the sample size is small.

Approximate Chi Square Value (26.77, α) 15.98 Adjusted Chi Square Value (26.77, β) 15.51 95% Gamma Approximate UCL (use when n>=50) 0.143 95% Gamma Adjusted UCL (use when n<50) 0.147 nu hat (MLE) 28.17 nu star (bias corrected) 26.77
Adjusted Level of Significance (β) 0.0413
k hat (MLE) 0.454 k star (bias corrected MLE) 0.432
Theta hat (MLE) 0.187 Theta star (bias corrected MLE) 0.197

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nu hat (KM) 10.45 nu star (KM) 10.78
theta hat (KM) 0.488 theta star (KM) 0.474
Variance (KM) 0.0402 SE of Mean (KM) 0.0376
k hat (KM) 0.169 k star (KM) 0.174
Estimates of Gamma Parameters using KM Estimates
Mean (KM) 0.0824 SD (KM) 0.201
95% Gamma Approximate KM-UCL (use when n>=50) 0.2 95% Gamma Adjusted KM-UCL (use when n<50) 0.211 Gamma Kaplan-Meier (KM) Statistics
Approximate Chi Square Value (10.78, α) 4.433 Adjusted Chi Square Value (10.78, β) 4.208 80% gamma percentile (KM) 0.0999 90% gamma percentile (KM) 0.248 95% gamma percentile (KM) 0.439 99% gamma percentile (KM) 0.979 Detected Data appear Lognormal at 5% Significance Level Lognormal ROS Statistics Using Imputed Non-Detects
Mean in Original Scale 0.0813 Mean in Log Scale -4.483
Lilliefors Test Statistic 0.182 Lilliefors GOF Test
5% Lilliefors Critical Value 0.243 Detected Data appear Lognormal at 5% Significance Level Lognormal GOF Test on Detected Observations Only
Shapiro Wilk Test Statistic 0.938 Shapiro Wilk GOF Test 5% Shapiro Wilk Critical Value 0.859 Detected Data appear Lognormal at 5% Significance Level Statistics using KM estimates on Logged Data and Assuming Lognormal Distribution KM Mean (logged) -4.253 KM Geo Mean 0.0142
95% BCA Bootstrap UCL 0.18 95% Bootstrap t UCL 0.248
95% H-UCL (Log ROS) 0.167
SD in Original Scale 0.204 SD in Log Scale 1.771
95% t UCL (assumes normality of ROS data) 0.144 95% Percentile Bootstrap UCL 0.146 DL/2 Statistics
DL/2 Normal DL/2 Log-Transformed
Mean in Original Scale 0.0811 Mean in Log Scale -4.533
KM SD (logged) 1.604 95% Critical H Value (KM-Log) 3.224 KM Standard Error of Mean (logged) 0.305
KM SD (logged) 1.604 95% Critical H Value (KM-Log) 3.224 KM Standard Error of Mean (logged) 0.305 95% H-UCL (KM -Log) 0.132 Suggested UCL to Use
Gamma Adjusted KM-UCL (use when k<=1 and 15 < n < 50 but k<=1)

0.211
DL/2 is not a recommended method, provided for comparisons and historical reasons Nonparametric Distribution Free UCL Statistics
Detected Data appear Gamma Distributed at 5% Significance Level SD in Original Scale 0.204 SD in Log Scale 1.804
95% t UCL (Assumes normality) 0.143 95% H-Stat UCL 0.174 Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.

Recommendations are based upon data size, data distribution, and skewness.

These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).

However, simulations results will not cover all Real World data sets; for additional insight the user may want to consult a statistician.

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Number of Detects 10 Number of Non-Detects 21
Number of Distinct Detects 10 Number of Distinct Non-Detects 20

ACENAPHTHENE
General Statistics
Total Number of Observations 31 Number of Distinct Observations 29 Median Detects 0.0815 CV Detects 1.501
Skewness Detects 2.481 Kurtosis Detects 6.663
Variance Detects 0.0384 Percent Non-Detects 67.74%
Mean Detects 0.131 SD Detects 0.196
Minimum Detect 0.00499 Minimum Non-Detect 0.00639
Maximum Detect 0.651 Maximum Non-Detect 0.00752
Lilliefors Test Statistic 0.334 Lilliefors GOF Test
5% Lilliefors Critical Value 0.262 Detected Data Not Normal at 5% Significance Level Normal GOF Test on Detects Only
Shapiro Wilk Test Statistic 0.664 Shapiro Wilk GOF Test 5% Shapiro Wilk Critical Value 0.842 Detected Data Not Normal at 5% Significance Level Mean of Logged Detects -3.053 SD of Logged Detects 1.65 95% KM (z) UCL 0.0832 95% KM Bootstrap t UCL 0.156
90% KM Chebyshev UCL 0.114 95% KM Chebyshev UCL 0.145
KM SD 0.121 95% KM (BCA) UCL 0.0864
95% KM (t) UCL 0.0844 95% KM (Percentile Bootstrap) UCL 0.0838 Detected Data Not Normal at 5% Significance Level
Kaplan-Meier (KM) Statistics using Normal Critical Values and other Nonparametric UCLs KM Mean 0.0456 KM Standard Error of Mean 0.0229
K-S Test Statistic 0.199 Kolmogorov-Smirnov GOF
5% K-S Critical Value 0.279 Detected data appear Gamma Distributed at 5% Significance Level Gamma GOF Tests on Detected Observations Only
A-D Test Statistic 0.418 Anderson-Darling GOF Test
5% A-D Critical Value 0.768 Detected data appear Gamma Distributed at 5% Significance Level

97.5% KM Chebyshev UCL 0.188 99% KM Chebyshev UCL 0.273 Mean (detects) 0.131
Theta hat (MLE) 0.215 Theta star (bias corrected MLE) 0.266 nu hat (MLE) 12.13 nu star (bias corrected) 9.826
Detected data appear Gamma Distributed at 5% Significance Level Gamma Statistics on Detected Data Only
k hat (MLE) 0.607 k star (bias corrected MLE) 0.491
Maximum 0.651 Median 0.01
SD 0.122 CV 2.488
For gamma distributed detected data, BTVs and UCLs may be computed using gamma distribution on KM estimates Minimum 0.00499 Mean 0.0489
Gamma ROS Statistics using Imputed Non-Detects
GROS may not be used when data set has > 50% NDs with many tied observations at multiple DLs GROS may not be used when kstar of detects is small such as <1.0, especially when the sample size is small (e.g., <15-20) For such situations, GROS method may yield incorrect values of UCLs and BTVs This is especially true when the sample size is small.

Approximate Chi Square Value (33.41, α) 21.19 Adjusted Chi Square Value (33.41, β) 20.65 95% Gamma Approximate UCL (use when n>=50) 0.0771 95% Gamma Adjusted UCL (use when n<50) 0.0791 nu hat (MLE) 35.51 nu star (bias corrected) 33.41
Adjusted Level of Significance (β) 0.0413
k hat (MLE) 0.573 k star (bias corrected MLE) 0.539
Theta hat (MLE) 0.0854 Theta star (bias corrected MLE) 0.0907

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nu hat (KM) 8.852 nu star (KM) 9.329
theta hat (KM) 0.32 theta star (KM) 0.303
Variance (KM) 0.0146 SE of Mean (KM) 0.0229
k hat (KM) 0.143 k star (KM) 0.15
Estimates of Gamma Parameters using KM Estimates
Mean (KM) 0.0456 SD (KM) 0.121
95% Gamma Approximate KM-UCL (use when n>=50) 0.121 95% Gamma Adjusted KM-UCL (use when n<50) 0.128 Gamma Kaplan-Meier (KM) Statistics
Approximate Chi Square Value (9.33, α) 3.527 Adjusted Chi Square Value (9.33, β) 3.33 80% gamma percentile (KM) 0.0498 90% gamma percentile (KM) 0.135 95% gamma percentile (KM) 0.251 99% gamma percentile (KM) 0.586 Detected Data appear Lognormal at 5% Significance Level Lognormal ROS Statistics Using Imputed Non-Detects
Mean in Original Scale 0.0438 Mean in Log Scale -5.064
Lilliefors Test Statistic 0.214 Lilliefors GOF Test
5% Lilliefors Critical Value 0.262 Detected Data appear Lognormal at 5% Significance Level Lognormal GOF Test on Detected Observations Only
Shapiro Wilk Test Statistic 0.923 Shapiro Wilk GOF Test 5% Shapiro Wilk Critical Value 0.842 Detected Data appear Lognormal at 5% Significance Level Statistics using KM estimates on Logged Data and Assuming Lognormal Distribution KM Mean (logged) -4.552 KM Geo Mean 0.0105
95% BCA Bootstrap UCL 0.109 95% Bootstrap t UCL 0.167
95% H-UCL (Log ROS) 0.0743
SD in Original Scale 0.123 SD in Log Scale 1.691
95% t UCL (assumes normality of ROS data) 0.0814 95% Percentile Bootstrap UCL 0.0808 DL/2 Statistics
DL/2 Normal DL/2 Log-Transformed
Mean in Original Scale 0.0445 Mean in Log Scale -4.826
KM SD (logged) 1.366 95% Critical H Value (KM-Log) 2.892 KM Standard Error of Mean (logged) 0.26
KM SD (logged) 1.366 95% Critical H Value (KM-Log) 2.892 KM Standard Error of Mean (logged) 0.26 95% H-UCL (KM -Log) 0.0552 Suggested UCL to Use
Gamma Adjusted KM-UCL (use when k<=1 and 15 < n < 50 but k<=1)

0.128
DL/2 is not a recommended method, provided for comparisons and historical reasons Nonparametric Distribution Free UCL Statistics
Detected Data appear Gamma Distributed at 5% Significance Level SD in Original Scale 0.123 SD in Log Scale 1.538
95% t UCL (Assumes normality) 0.082 95% H-Stat UCL 0.063 Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.

Recommendations are based upon data size, data distribution, and skewness.

These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).

However, simulations results will not cover all Real World data sets; for additional insight the user may want to consult a statistician.

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Number of Detects 23 Number of Non-Detects 8
Number of Distinct Detects 23 Number of Distinct Non-Detects 8

BENZO(A)ANTHRACENE
General Statistics
Total Number of Observations 31 Number of Distinct Observations 31 Median Detects 0.0544 CV Detects 1.796
Skewness Detects 1.725 Kurtosis Detects 1.78
Variance Detects 6.503 Percent Non-Detects 25.81%
Mean Detects 1.42 SD Detects 2.55
Minimum Detect 0.00212 Minimum Non-Detect 0.00644
Maximum Detect 8.45 Maximum Non-Detect 0.00741
Lilliefors Test Statistic 0.408 Lilliefors GOF Test
5% Lilliefors Critical Value 0.18 Detected Data Not Normal at 5% Significance Level Normal GOF Test on Detects Only
Shapiro Wilk Test Statistic 0.621 Shapiro Wilk GOF Test 5% Shapiro Wilk Critical Value 0.914 Detected Data Not Normal at 5% Significance Level Mean of Logged Detects -2.517 SD of Logged Detects 2.953 95% KM (z) UCL 1.73 95% KM Bootstrap t UCL 2.127
90% KM Chebyshev UCL 2.286 95% KM Chebyshev UCL 2.844
KM SD 2.236 95% KM (BCA) UCL 1.837
95% KM (t) UCL 1.751 95% KM (Percentile Bootstrap) UCL 1.755 Detected Data Not Normal at 5% Significance Level
Kaplan-Meier (KM) Statistics using Normal Critical Values and other Nonparametric UCLs KM Mean 1.054 KM Standard Error of Mean 0.411
K-S Test Statistic 0.212 Kolmogorov-Smirnov GOF
5% K-S Critical Value 0.199 Detected Data Not Gamma Distributed at 5% Significance Level Gamma GOF Tests on Detected Observations Only
A-D Test Statistic 1.447 Anderson-Darling GOF Test
5% A-D Critical Value 0.874 Detected Data Not Gamma Distributed at 5% Significance Level

97.5% KM Chebyshev UCL 3.619 99% KM Chebyshev UCL 5.14
Mean (detects) 1.42
Theta hat (MLE) 5.725 Theta star (bias corrected MLE) 5.804 nu hat (MLE) 11.41 nu star (bias corrected) 11.25
Detected Data Not Gamma Distributed at 5% Significance Level Gamma Statistics on Detected Data Only
k hat (MLE) 0.248 k star (bias corrected MLE) 0.245
Maximum 8.45 Median 0.01
SD 2.272 CV 2.151
For gamma distributed detected data, BTVs and UCLs may be computed using gamma distribution on KM estimates Minimum 0.00212 Mean 1.056
Gamma ROS Statistics using Imputed Non-Detects
GROS may not be used when data set has > 50% NDs with many tied observations at multiple DLs GROS may not be used when kstar of detects is small such as <1.0, especially when the sample size is small (e.g., <15-20) For such situations, GROS method may yield incorrect values of UCLs and BTVs This is especially true when the sample size is small.

Approximate Chi Square Value (14.28, α) 6.766 Adjusted Chi Square Value (14.28, β) 6.478 95% Gamma Approximate UCL (use when n>=50) 2.23 95% Gamma Adjusted UCL (use when n<50) 2.328 nu hat (MLE) 14.34 nu star (bias corrected) 14.28
Adjusted Level of Significance (β) 0.0413
k hat (MLE) 0.231 k star (bias corrected MLE) 0.23
Theta hat (MLE) 4.567 Theta star (bias corrected MLE) 4.584

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nu hat (KM) 13.78 nu star (KM) 13.78
theta hat (KM) 4.742 theta star (KM) 4.742
Variance (KM) 5 SE of Mean (KM) 0.411
k hat (KM) 0.222 k star (KM) 0.222
Estimates of Gamma Parameters using KM Estimates
Mean (KM) 1.054 SD (KM) 2.236
95% Gamma Approximate KM-UCL (use when n>=50) 2.262 95% Gamma Adjusted KM-UCL (use when n<50) 2.365 Gamma Kaplan-Meier (KM) Statistics
Approximate Chi Square Value (13.78, α) 6.424 Adjusted Chi Square Value (13.78, β) 6.145 80% gamma percentile (KM) 1.462 90% gamma percentile (KM) 3.184 95% gamma percentile (KM) 5.279 99% gamma percentile (KM) 10.95 Detected Data appear Approximate Lognormal at 5% Significance Level Lognormal ROS Statistics Using Imputed Non-Detects
Mean in Original Scale 1.054 Mean in Log Scale -3.323
Lilliefors Test Statistic 0.152 Lilliefors GOF Test
5% Lilliefors Critical Value 0.18 Detected Data appear Lognormal at 5% Significance Level Lognormal GOF Test on Detected Observations Only
Shapiro Wilk Test Statistic 0.894 Shapiro Wilk GOF Test 5% Shapiro Wilk Critical Value 0.914 Detected Data Not Lognormal at 5% Significance Level Statistics using KM estimates on Logged Data and Assuming Lognormal Distribution KM Mean (logged) -3.365 KM Geo Mean 0.0346
95% BCA Bootstrap UCL 1.904 95% Bootstrap t UCL 2.015
95% H-UCL (Log ROS) 35.92
SD in Original Scale 2.273 SD in Log Scale 2.886
95% t UCL (assumes normality of ROS data) 1.747 95% Percentile Bootstrap UCL 1.761 DL/2 Statistics
DL/2 Normal DL/2 Log-Transformed
Mean in Original Scale 1.054 Mean in Log Scale -3.326
KM SD (logged) 2.877 95% Critical H Value (KM-Log) 5.189 KM Standard Error of Mean (logged) 0.53
KM SD (logged) 2.877 95% Critical H Value (KM-Log) 5.189 KM Standard Error of Mean (logged) 0.53 95% H-UCL (KM -Log) 33.13 Suggested UCL to Use

97.5% KM (Chebyshev) UCL 3.619
DL/2 is not a recommended method, provided for comparisons and historical reasons Nonparametric Distribution Free UCL Statistics
Detected Data appear Approximate Lognormal Distributed at 5% Significance Level SD in Original Scale 2.273 SD in Log Scale 2.888
95% t UCL (Assumes normality) 1.747 95% H-Stat UCL 36.17 Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.

Recommendations are based upon data size, data distribution, and skewness.

These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).

However, simulations results will not cover all Real World data sets; for additional insight the user may want to consult a statistician.

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Number of Detects 26 Number of Non-Detects 5
Number of Distinct Detects 26 Number of Distinct Non-Detects 5

BENZO(A)PYRENE
General Statistics
Total Number of Observations 31 Number of Distinct Observations 31 Median Detects 0.0747 CV Detects 2.006
Skewness Detects 1.964 Kurtosis Detects 2.43
Variance Detects 13.75 Percent Non-Detects 16.13%
Mean Detects 1.848 SD Detects 3.708
Minimum Detect 0.00239 Minimum Non-Detect 0.00644
Maximum Detect 11.7 Maximum Non-Detect 0.00741
Lilliefors Test Statistic 0.425 Lilliefors GOF Test
5% Lilliefors Critical Value 0.17 Detected Data Not Normal at 5% Significance Level Normal GOF Test on Detects Only
Shapiro Wilk Test Statistic 0.555 Shapiro Wilk GOF Test 5% Shapiro Wilk Critical Value 0.92 Detected Data Not Normal at 5% Significance Level Mean of Logged Detects -2.61 SD of Logged Detects 3.057 95% KM (z) UCL 2.575 95% KM Bootstrap t UCL 3.159
90% KM Chebyshev UCL 3.418 95% KM Chebyshev UCL 4.264
KM SD 3.398 95% KM (BCA) UCL 2.686
95% KM (t) UCL 2.607 95% KM (Percentile Bootstrap) UCL 2.626 Detected Data Not Normal at 5% Significance Level
Kaplan-Meier (KM) Statistics using Normal Critical Values and other Nonparametric UCLs KM Mean 1.551 KM Standard Error of Mean 0.622
K-S Test Statistic 0.231 Kolmogorov-Smirnov GOF
5% K-S Critical Value 0.189 Detected Data Not Gamma Distributed at 5% Significance Level Gamma GOF Tests on Detected Observations Only
A-D Test Statistic 1.896 Anderson-Darling GOF Test
5% A-D Critical Value 0.889 Detected Data Not Gamma Distributed at 5% Significance Level

97.5% KM Chebyshev UCL 5.438 99% KM Chebyshev UCL 7.743 Mean (detects) 1.848
Theta hat (MLE) 8.244 Theta star (bias corrected MLE) 8.253 nu hat (MLE) 11.66 nu star (bias corrected) 11.65
Detected Data Not Gamma Distributed at 5% Significance Level Gamma Statistics on Detected Data Only
k hat (MLE) 0.224 k star (bias corrected MLE) 0.224
Maximum 11.7 Median 0.01
SD 3.454 CV 2.226
For gamma distributed detected data, BTVs and UCLs may be computed using gamma distribution on KM estimates Minimum 0.00239 Mean 1.552
Gamma ROS Statistics using Imputed Non-Detects
GROS may not be used when data set has > 50% NDs with many tied observations at multiple DLs GROS may not be used when kstar of detects is small such as <1.0, especially when the sample size is small (e.g., <15-20) For such situations, GROS method may yield incorrect values of UCLs and BTVs This is especially true when the sample size is small.

Approximate Chi Square Value (13.41, α) 6.172 Adjusted Chi Square Value (13.41, β) 5.9 95% Gamma Approximate UCL (use when n>=50) 3.373 95% Gamma Adjusted UCL (use when n<50) 3.528 nu hat (MLE) 13.38 nu star (bias corrected) 13.41
Adjusted Level of Significance (β) 0.0413
k hat (MLE) 0.216 k star (bias corrected MLE) 0.216
Theta hat (MLE) 7.193 Theta star (bias corrected MLE) 7.172

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nu hat (KM) 12.91 nu star (KM) 13
theta hat (KM) 7.445 theta star (KM) 7.397
Variance (KM) 11.55 SE of Mean (KM) 0.622
k hat (KM) 0.208 k star (KM) 0.21
Estimates of Gamma Parameters using KM Estimates
Mean (KM) 1.551 SD (KM) 3.398
95% Gamma Approximate KM-UCL (use when n>=50) 3.422 95% Gamma Adjusted KM-UCL (use when n<50) 3.583 Gamma Kaplan-Meier (KM) Statistics
Approximate Chi Square Value (13.00, α) 5.891 Adjusted Chi Square Value (13.00, β) 5.626 80% gamma percentile (KM) 2.093 90% gamma percentile (KM) 4.69 95% gamma percentile (KM) 7.892 99% gamma percentile (KM) 16.64 Detected Data appear Approximate Lognormal at 5% Significance Level Lognormal ROS Statistics Using Imputed Non-Detects
Mean in Original Scale 1.551 Mean in Log Scale -3.054
Lilliefors Test Statistic 0.17 Lilliefors GOF Test
5% Lilliefors Critical Value 0.17 Detected Data appear Lognormal at 5% Significance Level Lognormal GOF Test on Detected Observations Only
Shapiro Wilk Test Statistic 0.874 Shapiro Wilk GOF Test 5% Shapiro Wilk Critical Value 0.92 Detected Data Not Lognormal at 5% Significance Level Statistics using KM estimates on Logged Data and Assuming Lognormal Distribution KM Mean (logged) -3.103 KM Geo Mean 0.0449
95% BCA Bootstrap UCL 2.832 95% Bootstrap t UCL 3.34
95% H-UCL (Log ROS) 71.78
SD in Original Scale 3.454 SD in Log Scale 2.974
95% t UCL (assumes normality of ROS data) 2.604 95% Percentile Bootstrap UCL 2.651 DL/2 Statistics
DL/2 Normal DL/2 Log-Transformed
Mean in Original Scale 1.551 Mean in Log Scale -3.102
KM SD (logged) 2.971 95% Critical H Value (KM-Log) 5.34 KM Standard Error of Mean (logged) 0.545
KM SD (logged) 2.971 95% Critical H Value (KM-Log) 5.34 KM Standard Error of Mean (logged) 0.545 95% H-UCL (KM -Log) 67.03 Suggested UCL to Use
99% KM (Chebyshev) UCL 7.743
DL/2 is not a recommended method, provided for comparisons and historical reasons Nonparametric Distribution Free UCL Statistics
Detected Data appear Approximate Lognormal Distributed at 5% Significance Level SD in Original Scale 3.454 SD in Log Scale 3.015
95% t UCL (Assumes normality) 2.604 95% H-Stat UCL 83.32 Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.

Recommendations are based upon data size, data distribution, and skewness.

These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).

However, simulations results will not cover all Real World data sets; for additional insight the user may want to consult a statistician.

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Number of Detects 29 Number of Non-Detects 2
Number of Distinct Detects 29 Number of Distinct Non-Detects 2

BENZO(B)FLUORANTHENE
General Statistics
Total Number of Observations 31 Number of Distinct Observations 31 Median Detects 0.0169 CV Detects 2.182
Skewness Detects 2.261 Kurtosis Detects 3.971
Variance Detects 17.21 Percent Non-Detects 6.452%
Mean Detects 1.901 SD Detects 4.149
Minimum Detect 0.00244 Minimum Non-Detect 0.00725
Maximum Detect 14.8 Maximum Non-Detect 0.00741
Lilliefors Test Statistic 0.433 Lilliefors GOF Test
5% Lilliefors Critical Value 0.161 Detected Data Not Normal at 5% Significance Level Normal GOF Test on Detects Only
Shapiro Wilk Test Statistic 0.525 Shapiro Wilk GOF Test 5% Shapiro Wilk Critical Value 0.926 Detected Data Not Normal at 5% Significance Level Mean of Logged Detects -2.843 SD of Logged Detects 3.068 95% KM (z) UCL 2.973 95% KM Bootstrap t UCL 3.669
90% KM Chebyshev UCL 3.956 95% KM Chebyshev UCL 4.942
KM SD 3.97 95% KM (BCA) UCL 3.104
95% KM (t) UCL 3.011 95% KM (Percentile Bootstrap) UCL 3.055 Detected Data Not Normal at 5% Significance Level
Kaplan-Meier (KM) Statistics using Normal Critical Values and other Nonparametric UCLs KM Mean 1.779 KM Standard Error of Mean 0.726
K-S Test Statistic 0.225 Kolmogorov-Smirnov GOF
5% K-S Critical Value 0.18 Detected Data Not Gamma Distributed at 5% Significance Level Gamma GOF Tests on Detected Observations Only
A-D Test Statistic 2.537 Anderson-Darling GOF Test
5% A-D Critical Value 0.898 Detected Data Not Gamma Distributed at 5% Significance Level

97.5% KM Chebyshev UCL 6.311 99% KM Chebyshev UCL 9
Mean (detects) 1.901
Theta hat (MLE) 9.07 Theta star (bias corrected MLE) 9.014 nu hat (MLE) 12.16 nu star (bias corrected) 12.23
Detected Data Not Gamma Distributed at 5% Significance Level Gamma Statistics on Detected Data Only
k hat (MLE) 0.21 k star (bias corrected MLE) 0.211
Maximum 14.8 Median 0.0102
SD 4.036 CV 2.268
For gamma distributed detected data, BTVs and UCLs may be computed using gamma distribution on KM estimates Minimum 0.00244 Mean 1.779
Gamma ROS Statistics using Imputed Non-Detects
GROS may not be used when data set has > 50% NDs with many tied observations at multiple DLs GROS may not be used when kstar of detects is small such as <1.0, especially when the sample size is small (e.g., <15-20) For such situations, GROS method may yield incorrect values of UCLs and BTVs This is especially true when the sample size is small.

Approximate Chi Square Value (12.94, α) 5.849 Adjusted Chi Square Value (12.94, β) 5.585 95% Gamma Approximate UCL (use when n>=50) 3.935 95% Gamma Adjusted UCL (use when n<50) 4.121 nu hat (MLE) 12.84 nu star (bias corrected) 12.94
Adjusted Level of Significance (β) 0.0413
k hat (MLE) 0.207 k star (bias corrected MLE) 0.209
Theta hat (MLE) 8.588 Theta star (bias corrected MLE) 8.528

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nu hat (KM) 12.44 nu star (KM) 12.57
theta hat (KM) 8.862 theta star (KM) 8.771
Variance (KM) 15.76 SE of Mean (KM) 0.726
k hat (KM) 0.201 k star (KM) 0.203
Estimates of Gamma Parameters using KM Estimates
Mean (KM) 1.779 SD (KM) 3.97
95% Gamma Approximate KM-UCL (use when n>=50) 3.989 95% Gamma Adjusted KM-UCL (use when n<50) 4.181 Gamma Kaplan-Meier (KM) Statistics
Approximate Chi Square Value (12.57, α) 5.607 Adjusted Chi Square Value (12.57, β) 5.349 80% gamma percentile (KM) 2.361 90% gamma percentile (KM) 5.38 95% gamma percentile (KM) 9.132 99% gamma percentile (KM) 19.44 Detected Data Not Lognormal at 5% Significance Level
Lognormal ROS Statistics Using Imputed Non-Detects
Mean in Original Scale 1.779 Mean in Log Scale -3.005
Lilliefors Test Statistic 0.198 Lilliefors GOF Test
5% Lilliefors Critical Value 0.161 Detected Data Not Lognormal at 5% Significance Level Lognormal GOF Test on Detected Observations Only
Shapiro Wilk Test Statistic 0.854 Shapiro Wilk GOF Test 5% Shapiro Wilk Critical Value 0.926 Detected Data Not Lognormal at 5% Significance Level Statistics using KM estimates on Logged Data and Assuming Lognormal Distribution KM Mean (logged) -3.024 KM Geo Mean 0.0486
95% BCA Bootstrap UCL 3.408 95% Bootstrap t UCL 3.675
95% H-UCL (Log ROS) 98.44
SD in Original Scale 4.036 SD in Log Scale 3.029
95% t UCL (assumes normality of ROS data) 3.009 95% Percentile Bootstrap UCL 2.992 DL/2 Statistics
DL/2 Normal DL/2 Log-Transformed
Mean in Original Scale 1.779 Mean in Log Scale -3.021
KM SD (logged) 2.997 95% Critical H Value (KM-Log) 5.383 KM Standard Error of Mean (logged) 0.548
KM SD (logged) 2.997 95% Critical H Value (KM-Log) 5.383 KM Standard Error of Mean (logged) 0.548 95% H-UCL (KM -Log) 82.53 Suggested UCL to Use
99% KM (Chebyshev) UCL 9
DL/2 is not a recommended method, provided for comparisons and historical reasons Nonparametric Distribution Free UCL Statistics
Data do not follow a Discernible Distribution at 5% Significance Level SD in Original Scale 4.036 SD in Log Scale 3.043
95% t UCL (Assumes normality) 3.009 95% H-Stat UCL 103.6 Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.

Recommendations are based upon data size, data distribution, and skewness.

These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).

However, simulations results will not cover all Real World data sets; for additional insight the user may want to consult a statistician.

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Number of Detects 25 Number of Non-Detects 6
Number of Distinct Detects 25 Number of Distinct Non-Detects 6

BENZO(G,H,I)PERYLENE
General Statistics
Total Number of Observations 31 Number of Distinct Observations 31 Median Detects 0.0751 CV Detects 1.955
Skewness Detects 2.247 Kurtosis Detects 4.728
Variance Detects 3.783 Percent Non-Detects 19.35%
Mean Detects 0.995 SD Detects 1.945
Minimum Detect 0.00215 Minimum Non-Detect 0.00644
Maximum Detect 7.52 Maximum Non-Detect 0.00741
Lilliefors Test Statistic 0.387 Lilliefors GOF Test
5% Lilliefors Critical Value 0.173 Detected Data Not Normal at 5% Significance Level Normal GOF Test on Detects Only
Shapiro Wilk Test Statistic 0.591 Shapiro Wilk GOF Test 5% Shapiro Wilk Critical Value 0.918 Detected Data Not Normal at 5% Significance Level Mean of Logged Detects -2.743 SD of Logged Detects 2.803 95% KM (z) UCL 1.332 95% KM Bootstrap t UCL 1.713
90% KM Chebyshev UCL 1.768 95% KM Chebyshev UCL 2.206
KM SD 1.756 95% KM (BCA) UCL 1.362
95% KM (t) UCL 1.349 95% KM (Percentile Bootstrap) UCL 1.342 Detected Data Not Normal at 5% Significance Level
Kaplan-Meier (KM) Statistics using Normal Critical Values and other Nonparametric UCLs KM Mean 0.803 KM Standard Error of Mean 0.322
K-S Test Statistic 0.188 Kolmogorov-Smirnov GOF
5% K-S Critical Value 0.191 Detected data appear Gamma Distributed at 5% Significance Level Gamma GOF Tests on Detected Observations Only
A-D Test Statistic 1.504 Anderson-Darling GOF Test
5% A-D Critical Value 0.872 Detected Data Not Gamma Distributed at 5% Significance Level

97.5% KM Chebyshev UCL 2.813 99% KM Chebyshev UCL 4.005 Mean (detects) 0.995
Theta hat (MLE) 3.854 Theta star (bias corrected MLE) 3.919 nu hat (MLE) 12.9 nu star (bias corrected) 12.69
Detected data follow Appr. Gamma Distribution at 5% Significance Level Gamma Statistics on Detected Data Only
k hat (MLE) 0.258 k star (bias corrected MLE) 0.254
Maximum 7.52 Median 0.01
SD 1.784 CV 2.219
For gamma distributed detected data, BTVs and UCLs may be computed using gamma distribution on KM estimates Minimum 0.00215 Mean 0.804
Gamma ROS Statistics using Imputed Non-Detects
GROS may not be used when data set has > 50% NDs with many tied observations at multiple DLs GROS may not be used when kstar of detects is small such as <1.0, especially when the sample size is small (e.g., <15-20) For such situations, GROS method may yield incorrect values of UCLs and BTVs This is especially true when the sample size is small.

Approximate Chi Square Value (15.15, α) 7.364 Adjusted Chi Square Value (15.15, β) 7.063 95% Gamma Approximate UCL (use when n>=50) 1.654 95% Gamma Adjusted UCL (use when n<50) 1.725 nu hat (MLE) 15.29 nu star (bias corrected) 15.15
Adjusted Level of Significance (β) 0.0413
k hat (MLE) 0.247 k star (bias corrected MLE) 0.244
Theta hat (MLE) 3.26 Theta star (bias corrected MLE) 3.291

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nu hat (KM) 12.97 nu star (KM) 13.05
theta hat (KM) 3.839 theta star (KM) 3.816
Variance (KM) 3.082 SE of Mean (KM) 0.322
k hat (KM) 0.209 k star (KM) 0.21
Estimates of Gamma Parameters using KM Estimates
Mean (KM) 0.803 SD (KM) 1.756
95% Gamma Approximate KM-UCL (use when n>=50) 1.768 95% Gamma Adjusted KM-UCL (use when n<50) 1.851 Gamma Kaplan-Meier (KM) Statistics
Approximate Chi Square Value (13.05, α) 5.924 Adjusted Chi Square Value (13.05, β) 5.658 80% gamma percentile (KM) 1.085 90% gamma percentile (KM) 2.428 95% gamma percentile (KM) 4.082 99% gamma percentile (KM) 8.598 Detected Data Not Lognormal at 5% Significance Level
Lognormal ROS Statistics Using Imputed Non-Detects
Mean in Original Scale 0.803 Mean in Log Scale -3.222
Lilliefors Test Statistic 0.194 Lilliefors GOF Test
5% Lilliefors Critical Value 0.173 Detected Data Not Lognormal at 5% Significance Level Lognormal GOF Test on Detected Observations Only
Shapiro Wilk Test Statistic 0.891 Shapiro Wilk GOF Test 5% Shapiro Wilk Critical Value 0.918 Detected Data Not Lognormal at 5% Significance Level Statistics using KM estimates on Logged Data and Assuming Lognormal Distribution KM Mean (logged) -3.296 KM Geo Mean 0.037
95% BCA Bootstrap UCL 1.529 95% Bootstrap t UCL 1.693
95% H-UCL (Log ROS) 16.89
SD in Original Scale 1.784 SD in Log Scale 2.697
95% t UCL (assumes normality of ROS data) 1.347 95% Percentile Bootstrap UCL 1.372 DL/2 Statistics
DL/2 Normal DL/2 Log-Transformed
Mean in Original Scale 0.803 Mean in Log Scale -3.307
KM SD (logged) 2.717 95% Critical H Value (KM-Log) 4.933 KM Standard Error of Mean (logged) 0.5
KM SD (logged) 2.717 95% Critical H Value (KM-Log) 4.933 KM Standard Error of Mean (logged) 0.5 95% H-UCL (KM -Log) 17.16 When a data set follows an approximate (e.g., normal) distribution passing one of the GOF test When applicable, it is suggested to use a UCL based upon a distribution (e.g., gamma) passing both GOF tests in ProUCL Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.

Suggested UCL to Use
Gamma Adjusted KM-UCL (use when k<=1 and 15 < n < 50 but k<=1)

1.851
DL/2 is not a recommended method, provided for comparisons and historical reasons Nonparametric Distribution Free UCL Statistics
Detected Data appear Approximate Gamma Distributed at 5% Significance Level SD in Original Scale 1.785 SD in Log Scale 2.767
95% t UCL (Assumes normality) 1.347 95% H-Stat UCL 21.14 Recommendations are based upon data size, data distribution, and skewness.

These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).

However, simulations results will not cover all Real World data sets; for additional insight the user may want to consult a statistician.

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Number of Detects 18 Number of Non-Detects 13
Number of Distinct Detects 18 Number of Distinct Non-Detects 13 General Statistics
Total Number of Observations 31 Number of Distinct Observations 31

BENZO(K)FLUORANTHENE
Median Detects 0.0815 CV Detects 1.627
Skewness Detects 1.617 Kurtosis Detects 1.363
Variance Detects 1.922 Percent Non-Detects 41.94%
Mean Detects 0.852 SD Detects 1.386
Minimum Detect 0.00264 Minimum Non-Detect 0.00639
Maximum Detect 4.02 Maximum Non-Detect 0.00752
Lilliefors Test Statistic 0.367 Lilliefors GOF Test
5% Lilliefors Critical Value 0.202 Detected Data Not Normal at 5% Significance Level Normal GOF Test on Detects Only
Shapiro Wilk Test Statistic 0.662 Shapiro Wilk GOF Test 5% Shapiro Wilk Critical Value 0.897 Detected Data Not Normal at 5% Significance Level Mean of Logged Detects -2.228 SD of Logged Detects 2.484 95% KM (z) UCL 0.833 95% KM Bootstrap t UCL 1.018
90% KM Chebyshev UCL 1.111 95% KM Chebyshev UCL 1.389
KM SD 1.109 95% KM (BCA) UCL 0.837
95% KM (t) UCL 0.844 95% KM (Percentile Bootstrap) UCL 0.851 Detected Data Not Normal at 5% Significance Level
Kaplan-Meier (KM) Statistics using Normal Critical Values and other Nonparametric UCLs KM Mean 0.496 KM Standard Error of Mean 0.205
K-S Test Statistic 0.26 Kolmogorov-Smirnov GOF
5% K-S Critical Value 0.22 Detected Data Not Gamma Distributed at 5% Significance Level Gamma GOF Tests on Detected Observations Only
A-D Test Statistic 0.881 Anderson-Darling GOF Test
5% A-D Critical Value 0.836 Detected Data Not Gamma Distributed at 5% Significance Level

97.5% KM Chebyshev UCL 1.776 99% KM Chebyshev UCL 2.535 Mean (detects) 0.852
Theta hat (MLE) 2.593 Theta star (bias corrected MLE) 2.74 nu hat (MLE) 11.83 nu star (bias corrected) 11.19
Detected Data Not Gamma Distributed at 5% Significance Level Gamma Statistics on Detected Data Only
k hat (MLE) 0.329 k star (bias corrected MLE) 0.311
Maximum 4.02 Median 0.01
SD 1.126 CV 2.257
For gamma distributed detected data, BTVs and UCLs may be computed using gamma distribution on KM estimates Minimum 0.00264 Mean 0.499
Gamma ROS Statistics using Imputed Non-Detects
GROS may not be used when data set has > 50% NDs with many tied observations at multiple DLs GROS may not be used when kstar of detects is small such as <1.0, especially when the sample size is small (e.g., <15-20) For such situations, GROS method may yield incorrect values of UCLs and BTVs This is especially true when the sample size is small.

Approximate Chi Square Value (16.81, α) 8.534 Adjusted Chi Square Value (16.81, β) 8.207 95% Gamma Approximate UCL (use when n>=50) 0.982 95% Gamma Adjusted UCL (use when n<50) 1.022 nu hat (MLE) 17.13 nu star (bias corrected) 16.81
Adjusted Level of Significance (β) 0.0413
k hat (MLE) 0.276 k star (bias corrected MLE) 0.271
Theta hat (MLE) 1.805 Theta star (bias corrected MLE) 1.84

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nu hat (KM) 12.43 nu star (KM) 12.56
theta hat (KM) 2.476 theta star (KM) 2.45
Variance (KM) 1.229 SE of Mean (KM) 0.205
k hat (KM) 0.2 k star (KM) 0.203
Estimates of Gamma Parameters using KM Estimates
Mean (KM) 0.496 SD (KM) 1.109
95% Gamma Approximate KM-UCL (use when n>=50) 1.114 95% Gamma Adjusted KM-UCL (use when n<50) 1.167 Gamma Kaplan-Meier (KM) Statistics
Approximate Chi Square Value (12.56, α) 5.599 Adjusted Chi Square Value (12.56, β) 5.341 80% gamma percentile (KM) 0.658 90% gamma percentile (KM) 1.501 95% gamma percentile (KM) 2.549 99% gamma percentile (KM) 5.427 Detected Data appear Lognormal at 5% Significance Level Lognormal ROS Statistics Using Imputed Non-Detects
Mean in Original Scale 0.496 Mean in Log Scale -3.614
Lilliefors Test Statistic 0.145 Lilliefors GOF Test
5% Lilliefors Critical Value 0.202 Detected Data appear Lognormal at 5% Significance Level Lognormal GOF Test on Detected Observations Only
Shapiro Wilk Test Statistic 0.925 Shapiro Wilk GOF Test 5% Shapiro Wilk Critical Value 0.897 Detected Data appear Lognormal at 5% Significance Level Statistics using KM estimates on Logged Data and Assuming Lognormal Distribution KM Mean (logged) -3.622 KM Geo Mean 0.0267
95% BCA Bootstrap UCL 0.935 95% Bootstrap t UCL 1.017
95% H-UCL (Log ROS) 4.961
SD in Original Scale 1.127 SD in Log Scale 2.499
95% t UCL (assumes normality of ROS data) 0.84 95% Percentile Bootstrap UCL 0.848 DL/2 Statistics
DL/2 Normal DL/2 Log-Transformed
Mean in Original Scale 0.496 Mean in Log Scale -3.667
KM SD (logged) 2.473 95% Critical H Value (KM-Log) 4.545 KM Standard Error of Mean (logged) 0.463
KM SD (logged) 2.473 95% Critical H Value (KM-Log) 4.545 KM Standard Error of Mean (logged) 0.463 95% H-UCL (KM -Log) 4.429 Suggested UCL to Use

97.5% KM (Chebyshev) UCL 1.776
DL/2 is not a recommended method, provided for comparisons and historical reasons Nonparametric Distribution Free UCL Statistics
Detected Data appear Lognormal Distributed at 5% Significance Level SD in Original Scale 1.127 SD in Log Scale 2.542
95% t UCL (Assumes normality) 0.84 95% H-Stat UCL 5.614 Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.

Recommendations are based upon data size, data distribution, and skewness.

These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).

However, simulations results will not cover all Real World data sets; for additional insight the user may want to consult a statistician.

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Number of Detects 21 Number of Non-Detects 10
Number of Distinct Detects 21 Number of Distinct Non-Detects 10

CHRYSENE
General Statistics
Total Number of Observations 31 Number of Distinct Observations 31 Median Detects 0.172 CV Detects 1.693
Skewness Detects 1.561 Kurtosis Detects 1.041
Variance Detects 10.52 Percent Non-Detects 32.26%
Mean Detects 1.916 SD Detects 3.244
Minimum Detect 0.00297 Minimum Non-Detect 0.00644
Maximum Detect 9.86 Maximum Non-Detect 0.00752
Lilliefors Test Statistic 0.398 Lilliefors GOF Test
5% Lilliefors Critical Value 0.188 Detected Data Not Normal at 5% Significance Level Normal GOF Test on Detects Only
Shapiro Wilk Test Statistic 0.646 Shapiro Wilk GOF Test 5% Shapiro Wilk Critical Value 0.908 Detected Data Not Normal at 5% Significance Level Mean of Logged Detects -1.953 SD of Logged Detects 2.857 95% KM (z) UCL 2.133 95% KM Bootstrap t UCL 2.681
90% KM Chebyshev UCL 2.82 95% KM Chebyshev UCL 3.509
KM SD 2.754 95% KM (BCA) UCL 2.238
95% KM (t) UCL 2.159 95% KM (Percentile Bootstrap) UCL 2.179 Detected Data Not Normal at 5% Significance Level
Kaplan-Meier (KM) Statistics using Normal Critical Values and other Nonparametric UCLs KM Mean 1.299 KM Standard Error of Mean 0.507
K-S Test Statistic 0.222 Kolmogorov-Smirnov GOF
5% K-S Critical Value 0.207 Detected Data Not Gamma Distributed at 5% Significance Level Gamma GOF Tests on Detected Observations Only
A-D Test Statistic 1.145 Anderson-Darling GOF Test
5% A-D Critical Value 0.861 Detected Data Not Gamma Distributed at 5% Significance Level

97.5% KM Chebyshev UCL 4.465 99% KM Chebyshev UCL 6.342 Mean (detects) 1.916
Theta hat (MLE) 7.107 Theta star (bias corrected MLE) 7.29 nu hat (MLE) 11.32 nu star (bias corrected) 11.04
Detected Data Not Gamma Distributed at 5% Significance Level Gamma Statistics on Detected Data Only
k hat (MLE) 0.27 k star (bias corrected MLE) 0.263
Maximum 9.86 Median 0.0122
SD 2.799 CV 2.151
For gamma distributed detected data, BTVs and UCLs may be computed using gamma distribution on KM estimates Minimum 0.00297 Mean 1.301
Gamma ROS Statistics using Imputed Non-Detects
GROS may not be used when data set has > 50% NDs with many tied observations at multiple DLs GROS may not be used when kstar of detects is small such as <1.0, especially when the sample size is small (e.g., <15-20) For such situations, GROS method may yield incorrect values of UCLs and BTVs This is especially true when the sample size is small.

Approximate Chi Square Value (14.42, α) 6.862 Adjusted Chi Square Value (14.42, β) 6.572 95% Gamma Approximate UCL (use when n>=50) 2.734 95% Gamma Adjusted UCL (use when n<50) 2.855 nu hat (MLE) 14.49 nu star (bias corrected) 14.42
Adjusted Level of Significance (β) 0.0413
k hat (MLE) 0.234 k star (bias corrected MLE) 0.233
Theta hat (MLE) 5.566 Theta star (bias corrected MLE) 5.592

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nu hat (KM) 13.79 nu star (KM) 13.79
theta hat (KM) 5.839 theta star (KM) 5.84
Variance (KM) 7.586 SE of Mean (KM) 0.507
k hat (KM) 0.222 k star (KM) 0.222
Estimates of Gamma Parameters using KM Estimates
Mean (KM) 1.299 SD (KM) 2.754
95% Gamma Approximate KM-UCL (use when n>=50) 2.787 95% Gamma Adjusted KM-UCL (use when n<50) 2.913 Gamma Kaplan-Meier (KM) Statistics
Approximate Chi Square Value (13.79, α) 6.429 Adjusted Chi Square Value (13.79, β) 6.15 80% gamma percentile (KM) 1.802 90% gamma percentile (KM) 3.923 95% gamma percentile (KM) 6.504 99% gamma percentile (KM) 13.49 Detected Data appear Lognormal at 5% Significance Level Lognormal ROS Statistics Using Imputed Non-Detects
Mean in Original Scale 1.299 Mean in Log Scale -3.095
Lilliefors Test Statistic 0.144 Lilliefors GOF Test
5% Lilliefors Critical Value 0.188 Detected Data appear Lognormal at 5% Significance Level Lognormal GOF Test on Detected Observations Only
Shapiro Wilk Test Statistic 0.911 Shapiro Wilk GOF Test 5% Shapiro Wilk Critical Value 0.908 Detected Data appear Lognormal at 5% Significance Level Statistics using KM estimates on Logged Data and Assuming Lognormal Distribution KM Mean (logged) -3.089 KM Geo Mean 0.0456
95% BCA Bootstrap UCL 2.336 95% Bootstrap t UCL 2.563
95% H-UCL (Log ROS) 43.07
SD in Original Scale 2.8 SD in Log Scale 2.876
95% t UCL (assumes normality of ROS data) 2.152 95% Percentile Bootstrap UCL 2.174 DL/2 Statistics
DL/2 Normal DL/2 Log-Transformed
Mean in Original Scale 1.299 Mean in Log Scale -3.143
KM SD (logged) 2.828 95% Critical H Value (KM-Log) 5.11 KM Standard Error of Mean (logged) 0.523
KM SD (logged) 2.828 95% Critical H Value (KM-Log) 5.11 KM Standard Error of Mean (logged) 0.523 95% H-UCL (KM -Log) 34.78 Suggested UCL to Use

97.5% KM (Chebyshev) UCL 4.465
DL/2 is not a recommended method, provided for comparisons and historical reasons Nonparametric Distribution Free UCL Statistics
Detected Data appear Lognormal Distributed at 5% Significance Level SD in Original Scale 2.8 SD in Log Scale 2.918
95% t UCL (Assumes normality) 2.152 95% H-Stat UCL 50.13 Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.

Recommendations are based upon data size, data distribution, and skewness.

These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).

However, simulations results will not cover all Real World data sets; for additional insight the user may want to consult a statistician.

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Number of Detects 15 Number of Non-Detects 16
Number of Distinct Detects 15 Number of Distinct Non-Detects 16

DIBENZ(A,H)ANTHRACENE
General Statistics
Total Number of Observations 31 Number of Distinct Observations 31 Median Detects 0.0661 CV Detects 1.79
Skewness Detects 2.275 Kurtosis Detects 5.15
Variance Detects 1.6 Percent Non-Detects 51.61%
Mean Detects 0.707 SD Detects 1.265
Minimum Detect 0.00377 Minimum Non-Detect 0.00639
Maximum Detect 4.45 Maximum Non-Detect 0.00752
Lilliefors Test Statistic 0.311 Lilliefors GOF Test
5% Lilliefors Critical Value 0.22 Detected Data Not Normal at 5% Significance Level Normal GOF Test on Detects Only
Shapiro Wilk Test Statistic 0.63 Shapiro Wilk GOF Test
5% Shapiro Wilk Critical Value 0.881 Detected Data Not Normal at 5% Significance Level Mean of Logged Detects -2.063 SD of Logged Detects 2.082 95% KM (z) UCL 0.625 95% KM Bootstrap t UCL 1.031
90% KM Chebyshev UCL 0.857 95% KM Chebyshev UCL 1.089
KM SD 0.92 95% KM (BCA) UCL 0.669
95% KM (t) UCL 0.634 95% KM (Percentile Bootstrap) UCL 0.649 Detected Data Not Normal at 5% Significance Level
Kaplan-Meier (KM) Statistics using Normal Critical Values and other Nonparametric UCLs KM Mean 0.344 KM Standard Error of Mean 0.171
K-S Test Statistic 0.232 Kolmogorov-Smirnov GOF
5% K-S Critical Value 0.237 Detected data appear Gamma Distributed at 5% Significance Level Gamma GOF Tests on Detected Observations Only
A-D Test Statistic 0.793 Anderson-Darling GOF Test
5% A-D Critical Value 0.817 Detected data appear Gamma Distributed at 5% Significance Level

97.5% KM Chebyshev UCL 1.412 99% KM Chebyshev UCL 2.045 Mean (detects) 0.707
Theta hat (MLE) 1.832 Theta star (bias corrected MLE) 2.001 nu hat (MLE) 11.57 nu star (bias corrected) 10.59
Detected data appear Gamma Distributed at 5% Significance Level Gamma Statistics on Detected Data Only
k hat (MLE) 0.386 k star (bias corrected MLE) 0.353
Maximum 4.45 Median 0.01
SD 0.934 CV 2.69
For gamma distributed detected data, BTVs and UCLs may be computed using gamma distribution on KM estimates Minimum 0.00377 Mean 0.347
Gamma ROS Statistics using Imputed Non-Detects
GROS may not be used when data set has > 50% NDs with many tied observations at multiple DLs GROS may not be used when kstar of detects is small such as <1.0, especially when the sample size is small (e.g., <15-20) For such situations, GROS method may yield incorrect values of UCLs and BTVs This is especially true when the sample size is small.

Approximate Chi Square Value (18.02, α) 9.405 Adjusted Chi Square Value (18.02, β) 9.058 95% Gamma Approximate UCL (use when n>=50) 0.665 95% Gamma Adjusted UCL (use when n<50) 0.69 nu hat (MLE) 18.47 nu star (bias corrected) 18.02
Adjusted Level of Significance (β) 0.0413
k hat (MLE) 0.298 k star (bias corrected MLE) 0.291
Theta hat (MLE) 1.165 Theta star (bias corrected MLE) 1.194

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nu hat (KM) 8.667 nu star (KM) 9.161
theta hat (KM) 2.46 theta star (KM) 2.327
Variance (KM) 0.846 SE of Mean (KM) 0.171
k hat (KM) 0.14 k star (KM) 0.148
Estimates of Gamma Parameters using KM Estimates
Mean (KM) 0.344 SD (KM) 0.92
95% Gamma Approximate KM-UCL (use when n>=50) 0.92 95% Gamma Adjusted KM-UCL (use when n<50) 0.975 Gamma Kaplan-Meier (KM) Statistics
Approximate Chi Square Value (9.16, α) 3.425 Adjusted Chi Square Value (9.16, β) 3.232 80% gamma percentile (KM) 0.37 90% gamma percentile (KM) 1.017 95% gamma percentile (KM) 1.898 99% gamma percentile (KM) 4.461 Detected Data appear Lognormal at 5% Significance Level Lognormal ROS Statistics Using Imputed Non-Detects
Mean in Original Scale 0.343 Mean in Log Scale -4.373
Lilliefors Test Statistic 0.157 Lilliefors GOF Test
5% Lilliefors Critical Value 0.22 Detected Data appear Lognormal at 5% Significance Level Lognormal GOF Test on Detected Observations Only
Shapiro Wilk Test Statistic 0.957 Shapiro Wilk GOF Test 5% Shapiro Wilk Critical Value 0.881 Detected Data appear Lognormal at 5% Significance Level Statistics using KM estimates on Logged Data and Assuming Lognormal Distribution KM Mean (logged) -3.879 KM Geo Mean 0.0207
95% BCA Bootstrap UCL 0.8 95% Bootstrap t UCL 0.965
95% H-UCL (Log ROS) 5.007
SD in Original Scale 0.935 SD in Log Scale 2.682
95% t UCL (assumes normality of ROS data) 0.628 95% Percentile Bootstrap UCL 0.645 DL/2 Statistics
DL/2 Normal DL/2 Log-Transformed
Mean in Original Scale 0.344 Mean in Log Scale -3.924
KM SD (logged) 2.247 95% Critical H Value (KM-Log) 4.191 KM Standard Error of Mean (logged) 0.418
KM SD (logged) 2.247 95% Critical H Value (KM-Log) 4.191 KM Standard Error of Mean (logged) 0.418 95% H-UCL (KM -Log) 1.439 Suggested UCL to Use
Gamma Adjusted KM-UCL (use when k<=1 and 15 < n < 50 but k<=1)

0.975
DL/2 is not a recommended method, provided for comparisons and historical reasons Nonparametric Distribution Free UCL Statistics
Detected Data appear Gamma Distributed at 5% Significance Level SD in Original Scale 0.935 SD in Log Scale 2.319
95% t UCL (Assumes normality) 0.629 95% H-Stat UCL 1.799 Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.

Recommendations are based upon data size, data distribution, and skewness.

These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).

However, simulations results will not cover all Real World data sets; for additional insight the user may want to consult a statistician.

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501 Golf Club Drive, Santa Cruz, California

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Number of Detects 21 Number of Non-Detects 10
Number of Distinct Detects 21 Number of Distinct Non-Detects 10

FLUORANTHENE
General Statistics
Total Number of Observations 31 Number of Distinct Observations 31 Median Detects 0.123 CV Detects 1.766
Skewness Detects 2.121 Kurtosis Detects 4.768
Variance Detects 8.374 Percent Non-Detects 32.26%
Mean Detects 1.639 SD Detects 2.894
Minimum Detect 0.00273 Minimum Non-Detect 0.00644
Maximum Detect 11.1 Maximum Non-Detect 0.00752
Lilliefors Test Statistic 0.387 Lilliefors GOF Test
5% Lilliefors Critical Value 0.188 Detected Data Not Normal at 5% Significance Level Normal GOF Test on Detects Only
Shapiro Wilk Test Statistic 0.639 Shapiro Wilk GOF Test 5% Shapiro Wilk Critical Value 0.908 Detected Data Not Normal at 5% Significance Level Mean of Logged Detects -2.084 SD of Logged Detects 2.83 95% KM (z) UCL 1.852 95% KM Bootstrap t UCL 2.45
90% KM Chebyshev UCL 2.462 95% KM Chebyshev UCL 3.074
KM SD 2.447 95% KM (BCA) UCL 1.912
95% KM (t) UCL 1.876 95% KM (Percentile Bootstrap) UCL 1.899 Detected Data Not Normal at 5% Significance Level
Kaplan-Meier (KM) Statistics using Normal Critical Values and other Nonparametric UCLs KM Mean 1.111 KM Standard Error of Mean 0.45
K-S Test Statistic 0.21 Kolmogorov-Smirnov GOF
5% K-S Critical Value 0.207 Detected Data Not Gamma Distributed at 5% Significance Level Gamma GOF Tests on Detected Observations Only
A-D Test Statistic 1.105 Anderson-Darling GOF Test
5% A-D Critical Value 0.86 Detected Data Not Gamma Distributed at 5% Significance Level

97.5% KM Chebyshev UCL 3.923 99% KM Chebyshev UCL 5.592 Mean (detects) 1.639
Theta hat (MLE) 6.029 Theta star (bias corrected MLE) 6.19 nu hat (MLE) 11.42 nu star (bias corrected) 11.12
Detected Data Not Gamma Distributed at 5% Significance Level Gamma Statistics on Detected Data Only
k hat (MLE) 0.272 k star (bias corrected MLE) 0.265
Maximum 11.1 Median 0.0108
SD 2.486 CV 2.233
For gamma distributed detected data, BTVs and UCLs may be computed using gamma distribution on KM estimates Minimum 0.00273 Mean 1.113
Gamma ROS Statistics using Imputed Non-Detects
GROS may not be used when data set has > 50% NDs with many tied observations at multiple DLs GROS may not be used when kstar of detects is small such as <1.0, especially when the sample size is small (e.g., <15-20) For such situations, GROS method may yield incorrect values of UCLs and BTVs This is especially true when the sample size is small.

Approximate Chi Square Value (14.67, α) 7.036 Adjusted Chi Square Value (14.67, β) 6.742 95% Gamma Approximate UCL (use when n>=50) 2.322 95% Gamma Adjusted UCL (use when n<50) 2.423 nu hat (MLE) 14.77 nu star (bias corrected) 14.67
Adjusted Level of Significance (β) 0.0413
k hat (MLE) 0.238 k star (bias corrected MLE) 0.237
Theta hat (MLE) 4.673 Theta star (bias corrected MLE) 4.704

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501 Golf Club Drive, Santa Cruz, California

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nu hat (KM) 12.79 nu star (KM) 12.89
theta hat (KM) 5.386 theta star (KM) 5.346
Variance (KM) 5.986 SE of Mean (KM) 0.45
k hat (KM) 0.206 k star (KM) 0.208
Estimates of Gamma Parameters using KM Estimates
Mean (KM) 1.111 SD (KM) 2.447
95% Gamma Approximate KM-UCL (use when n>=50) 2.462 95% Gamma Adjusted KM-UCL (use when n<50) 2.579 Gamma Kaplan-Meier (KM) Statistics
Approximate Chi Square Value (12.89, α) 5.818 Adjusted Chi Square Value (12.89, β) 5.554 80% gamma percentile (KM) 1.494 90% gamma percentile (KM) 3.361 95% gamma percentile (KM) 5.669 99% gamma percentile (KM) 11.98 Detected Data appear Lognormal at 5% Significance Level Lognormal ROS Statistics Using Imputed Non-Detects
Mean in Original Scale 1.111 Mean in Log Scale -3.213
Lilliefors Test Statistic 0.157 Lilliefors GOF Test
5% Lilliefors Critical Value 0.188 Detected Data appear Lognormal at 5% Significance Level Lognormal GOF Test on Detected Observations Only
Shapiro Wilk Test Statistic 0.914 Shapiro Wilk GOF Test 5% Shapiro Wilk Critical Value 0.908 Detected Data appear Lognormal at 5% Significance Level Statistics using KM estimates on Logged Data and Assuming Lognormal Distribution KM Mean (logged) -3.196 KM Geo Mean 0.0409
95% BCA Bootstrap UCL 2.24 95% Bootstrap t UCL 2.433
95% H-UCL (Log ROS) 33.51
SD in Original Scale 2.487 SD in Log Scale 2.847
95% t UCL (assumes normality of ROS data) 1.869 95% Percentile Bootstrap UCL 1.895 DL/2 Statistics
DL/2 Normal DL/2 Log-Transformed
Mean in Original Scale 1.111 Mean in Log Scale -3.232
KM SD (logged) 2.789 95% Critical H Value (KM-Log) 5.048 KM Standard Error of Mean (logged) 0.515
KM SD (logged) 2.789 95% Critical H Value (KM-Log) 5.048 KM Standard Error of Mean (logged) 0.515 95% H-UCL (KM -Log) 26.18 Suggested UCL to Use

97.5% KM (Chebyshev) UCL 3.923
DL/2 is not a recommended method, provided for comparisons and historical reasons Nonparametric Distribution Free UCL Statistics
Detected Data appear Lognormal Distributed at 5% Significance Level SD in Original Scale 2.487 SD in Log Scale 2.864
95% t UCL (Assumes normality) 1.869 95% H-Stat UCL 35.5 Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.

Recommendations are based upon data size, data distribution, and skewness.

These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).

However, simulations results will not cover all Real World data sets; for additional insight the user may want to consult a statistician.

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501 Golf Club Drive, Santa Cruz, California

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Number of Detects 9 Number of Non-Detects 22
Number of Distinct Detects 9 Number of Distinct Non-Detects 21

FLUORENE
General Statistics
Total Number of Observations 31 Number of Distinct Observations 30 Median Detects 0.0241 CV Detects 1.575
Skewness Detects 2.173 Kurtosis Detects 4.571
Variance Detects 0.00733 Percent Non-Detects 70.97%
Mean Detects 0.0544 SD Detects 0.0856
Minimum Detect 0.00249 Minimum Non-Detect 0.00639
Maximum Detect 0.26 Maximum Non-Detect 0.00752
Lilliefors Test Statistic 0.381 Lilliefors GOF Test
5% Lilliefors Critical Value 0.274 Detected Data Not Normal at 5% Significance Level Normal GOF Test on Detects Only
Shapiro Wilk Test Statistic 0.662 Shapiro Wilk GOF Test 5% Shapiro Wilk Critical Value 0.829 Detected Data Not Normal at 5% Significance Level Mean of Logged Detects -4.011 SD of Logged Detects 1.662 95% KM (z) UCL 0.0332 95% KM Bootstrap t UCL 0.101
90% KM Chebyshev UCL 0.046 95% KM Chebyshev UCL 0.0587
KM SD 0.0494 95% KM (BCA) UCL 0.0365
95% KM (t) UCL 0.0337 95% KM (Percentile Bootstrap) UCL 0.0343 Detected Data Not Normal at 5% Significance Level
Kaplan-Meier (KM) Statistics using Normal Critical Values and other Nonparametric UCLs KM Mean 0.0177 KM Standard Error of Mean 0.00941
K-S Test Statistic 0.242 Kolmogorov-Smirnov GOF
5% K-S Critical Value 0.293 Detected data appear Gamma Distributed at 5% Significance Level Gamma GOF Tests on Detected Observations Only
A-D Test Statistic 0.524 Anderson-Darling GOF Test
5% A-D Critical Value 0.766 Detected data appear Gamma Distributed at 5% Significance Level

97.5% KM Chebyshev UCL 0.0765 99% KM Chebyshev UCL 0.111 Mean (detects) 0.0544
Theta hat (MLE) 0.0959 Theta star (bias corrected MLE) 0.12 nu hat (MLE) 10.21 nu star (bias corrected) 8.138
Detected data appear Gamma Distributed at 5% Significance Level Gamma Statistics on Detected Data Only
k hat (MLE) 0.567 k star (bias corrected MLE) 0.452
Maximum 0.26 Median 0.01
SD 0.0487 CV 2.13
For gamma distributed detected data, BTVs and UCLs may be computed using gamma distribution on KM estimates Minimum 0.00249 Mean 0.0229
Gamma ROS Statistics using Imputed Non-Detects
GROS may not be used when data set has > 50% NDs with many tied observations at multiple DLs GROS may not be used when kstar of detects is small such as <1.0, especially when the sample size is small (e.g., <15-20) For such situations, GROS method may yield incorrect values of UCLs and BTVs This is especially true when the sample size is small.

Approximate Chi Square Value (51.35, α) 35.89 Adjusted Chi Square Value (51.35, β) 35.18 95% Gamma Approximate UCL (use when n>=50) 0.0327 95% Gamma Adjusted UCL (use when n<50) 0.0334 nu hat (MLE) 55.38 nu star (bias corrected) 51.35
Adjusted Level of Significance (β) 0.0413
k hat (MLE) 0.893 k star (bias corrected MLE) 0.828
Theta hat (MLE) 0.0256 Theta star (bias corrected MLE) 0.0276

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501 Golf Club Drive, Santa Cruz, California

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nu hat (KM) 7.963 nu star (KM) 8.526
theta hat (KM) 0.138 theta star (KM) 0.129
Variance (KM) 0.00244 SE of Mean (KM) 0.00941
k hat (KM) 0.128 k star (KM) 0.138
Estimates of Gamma Parameters using KM Estimates
Mean (KM) 0.0177 SD (KM) 0.0494
95% Gamma Approximate KM-UCL (use when n>=50) 0.0496 95% Gamma Adjusted KM-UCL (use when n<50) 0.0527 Gamma Kaplan-Meier (KM) Statistics
Approximate Chi Square Value (8.53, α) 3.043 Adjusted Chi Square Value (8.53, β) 2.863 80% gamma percentile (KM) 0.0179 90% gamma percentile (KM) 0.0518 95% gamma percentile (KM) 0.099 99% gamma percentile (KM) 0.239 Detected Data appear Lognormal at 5% Significance Level Lognormal ROS Statistics Using Imputed Non-Detects
Mean in Original Scale 0.0179 Mean in Log Scale -5.304
Lilliefors Test Statistic 0.197 Lilliefors GOF Test
5% Lilliefors Critical Value 0.274 Detected Data appear Lognormal at 5% Significance Level Lognormal GOF Test on Detected Observations Only
Shapiro Wilk Test Statistic 0.907 Shapiro Wilk GOF Test 5% Shapiro Wilk Critical Value 0.829 Detected Data appear Lognormal at 5% Significance Level Statistics using KM estimates on Logged Data and Assuming Lognormal Distribution KM Mean (logged) -5.359 KM Geo Mean 0.00471
95% BCA Bootstrap UCL 0.0434 95% Bootstrap t UCL 0.105
95% H-UCL (Log ROS) 0.0188
SD in Original Scale 0.0502 SD in Log Scale 1.212
95% t UCL (assumes normality of ROS data) 0.0332 95% Percentile Bootstrap UCL 0.0337 DL/2 Statistics
DL/2 Normal DL/2 Log-Transformed
Mean in Original Scale 0.0182 Mean in Log Scale -5.187
KM SD (logged) 1.208 95% Critical H Value (KM-Log) 2.681 KM Standard Error of Mean (logged) 0.232
KM SD (logged) 1.208 95% Critical H Value (KM-Log) 2.681 KM Standard Error of Mean (logged) 0.232 95% H-UCL (KM -Log) 0.0176 Suggested UCL to Use
Gamma Adjusted KM-UCL (use when k<=1 and 15 < n < 50 but k<=1)

0.0527
DL/2 is not a recommended method, provided for comparisons and historical reasons Nonparametric Distribution Free UCL Statistics
Detected Data appear Gamma Distributed at 5% Significance Level SD in Original Scale 0.0501 SD in Log Scale 1.151
95% t UCL (Assumes normality) 0.0335 95% H-Stat UCL 0.0187 Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.

Recommendations are based upon data size, data distribution, and skewness.

These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).

However, simulations results will not cover all Real World data sets; for additional insight the user may want to consult a statistician.

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501 Golf Club Drive, Santa Cruz, California

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Number of Detects 21 Number of Non-Detects 10
Number of Distinct Detects 21 Number of Distinct Non-Detects 10 INDENO(1,2,3-CD)PYRENE
General Statistics
Total Number of Observations 31 Number of Distinct Observations 31 Median Detects 0.112 CV Detects 1.73
Skewness Detects 1.769 Kurtosis Detects 2.08
Variance Detects 3.542 Percent Non-Detects 32.26%
Mean Detects 1.088 SD Detects 1.882
Minimum Detect 0.00213 Minimum Non-Detect 0.00644
Maximum Detect 6.25 Maximum Non-Detect 0.00752
Lilliefors Test Statistic 0.378 Lilliefors GOF Test
5% Lilliefors Critical Value 0.188 Detected Data Not Normal at 5% Significance Level Normal GOF Test on Detects Only
Shapiro Wilk Test Statistic 0.644 Shapiro Wilk GOF Test 5% Shapiro Wilk Critical Value 0.908 Detected Data Not Normal at 5% Significance Level Mean of Logged Detects -2.299 SD of Logged Detects 2.705 95% KM (z) UCL 1.221 95% KM Bootstrap t UCL 1.477
90% KM Chebyshev UCL 1.618 95% KM Chebyshev UCL 2.017
KM SD 1.594 95% KM (BCA) UCL 1.243
95% KM (t) UCL 1.236 95% KM (Percentile Bootstrap) UCL 1.23 Detected Data Not Normal at 5% Significance Level
Kaplan-Meier (KM) Statistics using Normal Critical Values and other Nonparametric UCLs KM Mean 0.738 KM Standard Error of Mean 0.293
K-S Test Statistic 0.196 Kolmogorov-Smirnov GOF
5% K-S Critical Value 0.206 Detected data appear Gamma Distributed at 5% Significance Level Gamma GOF Tests on Detected Observations Only
A-D Test Statistic 0.996 Anderson-Darling GOF Test
5% A-D Critical Value 0.85 Detected Data Not Gamma Distributed at 5% Significance Level

97.5% KM Chebyshev UCL 2.571 99% KM Chebyshev UCL 3.658 Mean (detects) 1.088
Theta hat (MLE) 3.74 Theta star (bias corrected MLE) 3.87 nu hat (MLE) 12.22 nu star (bias corrected) 11.8
Detected data follow Appr. Gamma Distribution at 5% Significance Level Gamma Statistics on Detected Data Only
k hat (MLE) 0.291 k star (bias corrected MLE) 0.281
Maximum 6.25 Median 0.01
SD 1.62 CV 2.189
For gamma distributed detected data, BTVs and UCLs may be computed using gamma distribution on KM estimates Minimum 0.00213 Mean 0.74
Gamma ROS Statistics using Imputed Non-Detects
GROS may not be used when data set has > 50% NDs with many tied observations at multiple DLs GROS may not be used when kstar of detects is small such as <1.0, especially when the sample size is small (e.g., <15-20) For such situations, GROS method may yield incorrect values of UCLs and BTVs This is especially true when the sample size is small.

Approximate Chi Square Value (15.77, α) 7.8 Adjusted Chi Square Value (15.77, β) 7.488 95% Gamma Approximate UCL (use when n>=50) 1.496 95% Gamma Adjusted UCL (use when n<50) 1.559 nu hat (MLE) 15.98 nu star (bias corrected) 15.77
Adjusted Level of Significance (β) 0.0413
k hat (MLE) 0.258 k star (bias corrected MLE) 0.254
Theta hat (MLE) 2.871 Theta star (bias corrected MLE) 2.91

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501 Golf Club Drive, Santa Cruz, California

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nu hat (KM) 13.29 nu star (KM) 13.34
theta hat (KM) 3.444 theta star (KM) 3.432
Variance (KM) 2.542 SE of Mean (KM) 0.293
k hat (KM) 0.214 k star (KM) 0.215
Estimates of Gamma Parameters using KM Estimates
Mean (KM) 0.738 SD (KM) 1.594
95% Gamma Approximate KM-UCL (use when n>=50) 1.609 95% Gamma Adjusted KM-UCL (use when n<50) 1.683 Gamma Kaplan-Meier (KM) Statistics
Approximate Chi Square Value (13.34, α) 6.12 Adjusted Chi Square Value (13.34, β) 5.848 80% gamma percentile (KM) 1.008 90% gamma percentile (KM) 2.231 95% gamma percentile (KM) 3.73 99% gamma percentile (KM) 7.809 Detected Data appear Lognormal at 5% Significance Level Lognormal ROS Statistics Using Imputed Non-Detects
Mean in Original Scale 0.738 Mean in Log Scale -3.282
Lilliefors Test Statistic 0.154 Lilliefors GOF Test
5% Lilliefors Critical Value 0.188 Detected Data appear Lognormal at 5% Significance Level Lognormal GOF Test on Detected Observations Only
Shapiro Wilk Test Statistic 0.918 Shapiro Wilk GOF Test 5% Shapiro Wilk Critical Value 0.908 Detected Data appear Lognormal at 5% Significance Level Statistics using KM estimates on Logged Data and Assuming Lognormal Distribution KM Mean (logged) -3.356 KM Geo Mean 0.0349
95% BCA Bootstrap UCL 1.295 95% Bootstrap t UCL 1.543
95% H-UCL (Log ROS) 12.51
SD in Original Scale 1.621 SD in Log Scale 2.641
95% t UCL (assumes normality of ROS data) 1.232 95% Percentile Bootstrap UCL 1.249 DL/2 Statistics
DL/2 Normal DL/2 Log-Transformed
Mean in Original Scale 0.738 Mean in Log Scale -3.378
KM SD (logged) 2.664 95% Critical H Value (KM-Log) 4.848 KM Standard Error of Mean (logged) 0.493
KM SD (logged) 2.664 95% Critical H Value (KM-Log) 4.848 KM Standard Error of Mean (logged) 0.493 95% H-UCL (KM -Log) 12.82 When a data set follows an approximate (e.g., normal) distribution passing one of the GOF test When applicable, it is suggested to use a UCL based upon a distribution (e.g., gamma) passing both GOF tests in ProUCL Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.

Suggested UCL to Use
Gamma Adjusted KM-UCL (use when k<=1 and 15 < n < 50 but k<=1)

1.683
DL/2 is not a recommended method, provided for comparisons and historical reasons Nonparametric Distribution Free UCL Statistics
Detected Data appear Approximate Gamma Distributed at 5% Significance Level SD in Original Scale 1.621 SD in Log Scale 2.721
95% t UCL (Assumes normality) 1.232 95% H-Stat UCL 16.09 Recommendations are based upon data size, data distribution, and skewness.

These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).

However, simulations results will not cover all Real World data sets; for additional insight the user may want to consult a statistician.

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501 Golf Club Drive, Santa Cruz, California

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Number of Detects 14 Number of Non-Detects 17
Number of Distinct Detects 14 Number of Distinct Non-Detects 17 General Statistics
Total Number of Observations 31 Number of Distinct Observations 31

PHENANTHRENE
Median Detects 0.0878 CV Detects 1.783
Skewness Detects 2.309 Kurtosis Detects 5.232
Variance Detects 1.447 Percent Non-Detects 54.84%
Mean Detects 0.675 SD Detects 1.203
Minimum Detect 0.00295 Minimum Non-Detect 0.00639
Maximum Detect 4.14 Maximum Non-Detect 0.215
Lilliefors Test Statistic 0.318 Lilliefors GOF Test
5% Lilliefors Critical Value 0.226 Detected Data Not Normal at 5% Significance Level Normal GOF Test on Detects Only
Shapiro Wilk Test Statistic 0.633 Shapiro Wilk GOF Test 5% Shapiro Wilk Critical Value 0.874 Detected Data Not Normal at 5% Significance Level Mean of Logged Detects -2.349 SD of Logged Detects 2.39 95% KM (z) UCL 0.567 95% KM Bootstrap t UCL 1.053
90% KM Chebyshev UCL 0.781 95% KM Chebyshev UCL 0.996
KM SD 0.847 95% KM (BCA) UCL 0.616
95% KM (t) UCL 0.576 95% KM (Percentile Bootstrap) UCL 0.58 Detected Data Not Normal at 5% Significance Level
Kaplan-Meier (KM) Statistics using Normal Critical Values and other Nonparametric UCLs KM Mean 0.308 KM Standard Error of Mean 0.158
K-S Test Statistic 0.21 Kolmogorov-Smirnov GOF
5% K-S Critical Value 0.246 Detected data appear Gamma Distributed at 5% Significance Level Gamma GOF Tests on Detected Observations Only
A-D Test Statistic 0.561 Anderson-Darling GOF Test
5% A-D Critical Value 0.823 Detected data appear Gamma Distributed at 5% Significance Level

97.5% KM Chebyshev UCL 1.294 99% KM Chebyshev UCL 1.879 Mean (detects) 0.675
Theta hat (MLE) 1.957 Theta star (bias corrected MLE) 2.118 nu hat (MLE) 9.653 nu star (bias corrected) 8.918
Detected data appear Gamma Distributed at 5% Significance Level Gamma Statistics on Detected Data Only
k hat (MLE) 0.345 k star (bias corrected MLE) 0.319
Maximum 4.14 Median 0.01
SD 0.86 CV 2.773
For gamma distributed detected data, BTVs and UCLs may be computed using gamma distribution on KM estimates Minimum 0.00295 Mean 0.31
Gamma ROS Statistics using Imputed Non-Detects
GROS may not be used when data set has > 50% NDs with many tied observations at multiple DLs GROS may not be used when kstar of detects is small such as <1.0, especially when the sample size is small (e.g., <15-20) For such situations, GROS method may yield incorrect values of UCLs and BTVs This is especially true when the sample size is small.

Approximate Chi Square Value (17.43, α) 8.981 Adjusted Chi Square Value (17.43, β) 8.644 95% Gamma Approximate UCL (use when n>=50) 0.602 95% Gamma Adjusted UCL (use when n<50) 0.626 nu hat (MLE) 17.82 nu star (bias corrected) 17.43
Adjusted Level of Significance (β) 0.0413
k hat (MLE) 0.287 k star (bias corrected MLE) 0.281
Theta hat (MLE) 1.079 Theta star (bias corrected MLE) 1.103

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nu hat (KM) 8.18 nu star (KM) 8.722
theta hat (KM) 2.332 theta star (KM) 2.187
Variance (KM) 0.718 SE of Mean (KM) 0.158
k hat (KM) 0.132 k star (KM) 0.141
Estimates of Gamma Parameters using KM Estimates
Mean (KM) 0.308 SD (KM) 0.847
95% Gamma Approximate KM-UCL (use when n>=50) 0.849 95% Gamma Adjusted KM-UCL (use when n<50) 0.902 Gamma Kaplan-Meier (KM) Statistics
Approximate Chi Square Value (8.72, α) 3.16 Adjusted Chi Square Value (8.72, β) 2.976 80% gamma percentile (KM) 0.317 90% gamma percentile (KM) 0.903 95% gamma percentile (KM) 1.714 99% gamma percentile (KM) 4.098 Detected Data appear Lognormal at 5% Significance Level Lognormal ROS Statistics Using Imputed Non-Detects
Mean in Original Scale 0.306 Mean in Log Scale -4.358
Lilliefors Test Statistic 0.143 Lilliefors GOF Test
5% Lilliefors Critical Value 0.226 Detected Data appear Lognormal at 5% Significance Level Lognormal GOF Test on Detected Observations Only
Shapiro Wilk Test Statistic 0.942 Shapiro Wilk GOF Test 5% Shapiro Wilk Critical Value 0.874 Detected Data appear Lognormal at 5% Significance Level Statistics using KM estimates on Logged Data and Assuming Lognormal Distribution KM Mean (logged) -4.024 KM Geo Mean 0.0179
95% BCA Bootstrap UCL 0.718 95% Bootstrap t UCL 1.159
95% H-UCL (Log ROS) 1.861
SD in Original Scale 0.862 SD in Log Scale 2.44
95% t UCL (assumes normality of ROS data) 0.569 95% Percentile Bootstrap UCL 0.57 DL/2 Statistics
DL/2 Normal DL/2 Log-Transformed
Mean in Original Scale 0.31 Mean in Log Scale -4.02
KM SD (logged) 2.197 95% Critical H Value (KM-Log) 4.113 KM Standard Error of Mean (logged) 0.432
KM SD (logged) 2.197 95% Critical H Value (KM-Log) 4.113 KM Standard Error of Mean (logged) 0.432 95% H-UCL (KM -Log) 1.04 Suggested UCL to Use
Gamma Adjusted KM-UCL (use when k<=1 and 15 < n < 50 but k<=1)

0.902
DL/2 is not a recommended method, provided for comparisons and historical reasons Nonparametric Distribution Free UCL Statistics
Detected Data appear Gamma Distributed at 5% Significance Level SD in Original Scale 0.86 SD in Log Scale 2.291
95% t UCL (Assumes normality) 0.572 95% H-Stat UCL 1.473 Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.

Recommendations are based upon data size, data distribution, and skewness.

These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).

However, simulations results will not cover all Real World data sets; for additional insight the user may want to consult a statistician.

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501 Golf Club Drive, Santa Cruz, California

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Number of Detects 22 Number of Non-Detects 9
Number of Distinct Detects 22 Number of Distinct Non-Detects 9 PYRENE
General Statistics
Total Number of Observations 31 Number of Distinct Observations 31 Median Detects 0.0997 CV Detects 1.967
Skewness Detects 2.365 Kurtosis Detects 5.645
Variance Detects 9.213 Percent Non-Detects 29.03%
Mean Detects 1.543 SD Detects 3.035
Minimum Detect 0.0028 Minimum Non-Detect 0.00644
Maximum Detect 11.8 Maximum Non-Detect 0.00741
Lilliefors Test Statistic 0.366 Lilliefors GOF Test
5% Lilliefors Critical Value 0.184 Detected Data Not Normal at 5% Significance Level Normal GOF Test on Detects Only
Shapiro Wilk Test Statistic 0.589 Shapiro Wilk GOF Test 5% Shapiro Wilk Critical Value 0.911 Detected Data Not Normal at 5% Significance Level Mean of Logged Detects -2.317 SD of Logged Detects 2.831 95% KM (z) UCL 1.88 95% KM Bootstrap t UCL 2.416
90% KM Chebyshev UCL 2.527 95% KM Chebyshev UCL 3.175
KM SD 2.594 95% KM (BCA) UCL 1.955
95% KM (t) UCL 1.905 95% KM (Percentile Bootstrap) UCL 1.92 Detected Data Not Normal at 5% Significance Level
Kaplan-Meier (KM) Statistics using Normal Critical Values and other Nonparametric UCLs KM Mean 1.096 KM Standard Error of Mean 0.477
K-S Test Statistic 0.187 Kolmogorov-Smirnov GOF
5% K-S Critical Value 0.203 Detected data appear Gamma Distributed at 5% Significance Level Gamma GOF Tests on Detected Observations Only
A-D Test Statistic 1.219 Anderson-Darling GOF Test
5% A-D Critical Value 0.869 Detected Data Not Gamma Distributed at 5% Significance Level

97.5% KM Chebyshev UCL 4.074 99% KM Chebyshev UCL 5.841 Mean (detects) 1.543
Theta hat (MLE) 6.001 Theta star (bias corrected MLE) 6.114 nu hat (MLE) 11.31 nu star (bias corrected) 11.1
Detected data follow Appr. Gamma Distribution at 5% Significance Level Gamma Statistics on Detected Data Only
k hat (MLE) 0.257 k star (bias corrected MLE) 0.252
Maximum 11.8 Median 0.0124
SD 2.636 CV 2.401
For gamma distributed detected data, BTVs and UCLs may be computed using gamma distribution on KM estimates Minimum 0.0028 Mean 1.098
Gamma ROS Statistics using Imputed Non-Detects
GROS may not be used when data set has > 50% NDs with many tied observations at multiple DLs GROS may not be used when kstar of detects is small such as <1.0, especially when the sample size is small (e.g., <15-20) For such situations, GROS method may yield incorrect values of UCLs and BTVs This is especially true when the sample size is small.

Approximate Chi Square Value (14.41, α) 6.855 Adjusted Chi Square Value (14.41, β) 6.566 95% Gamma Approximate UCL (use when n>=50) 2.308 95% Gamma Adjusted UCL (use when n<50) 2.41 nu hat (MLE) 14.48 nu star (bias corrected) 14.41
Adjusted Level of Significance (β) 0.0413
k hat (MLE) 0.234 k star (bias corrected MLE) 0.232
Theta hat (MLE) 4.7 Theta star (bias corrected MLE) 4.722

42.220
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501 Golf Club Drive, Santa Cruz, California

Page 28 of 34 ends

nu hat (KM) 11.07 nu star (KM) 11.33
theta hat (KM) 6.139 theta star (KM) 5.997
Variance (KM) 6.729 SE of Mean (KM) 0.477
k hat (KM) 0.179 k star (KM) 0.183
Estimates of Gamma Parameters using KM Estimates
Mean (KM) 1.096 SD (KM) 2.594
95% Gamma Approximate KM-UCL (use when n>=50) 2.593 95% Gamma Adjusted KM-UCL (use when n<50) 2.727 Gamma Kaplan-Meier (KM) Statistics
Approximate Chi Square Value (11.33, α) 4.79 Adjusted Chi Square Value (11.33, β) 4.555 80% gamma percentile (KM) 1.373 90% gamma percentile (KM) 3.308 95% gamma percentile (KM) 5.777 99% gamma percentile (KM) 12.68 Detected Data appear Lognormal at 5% Significance Level Lognormal ROS Statistics Using Imputed Non-Detects
Mean in Original Scale 1.096 Mean in Log Scale -3.272
Lilliefors Test Statistic 0.149 Lilliefors GOF Test
5% Lilliefors Critical Value 0.184 Detected Data appear Lognormal at 5% Significance Level Lognormal GOF Test on Detected Observations Only
Shapiro Wilk Test Statistic 0.915 Shapiro Wilk GOF Test 5% Shapiro Wilk Critical Value 0.911 Detected Data appear Lognormal at 5% Significance Level Statistics using KM estimates on Logged Data and Assuming Lognormal Distribution KM Mean (logged) -3.256 KM Geo Mean 0.0386
95% BCA Bootstrap UCL 2.203 95% Bootstrap t UCL 2.574
95% H-UCL (Log ROS) 27.15
SD in Original Scale 2.637 SD in Log Scale 2.814
95% t UCL (assumes normality of ROS data) 1.9 95% Percentile Bootstrap UCL 1.904 DL/2 Statistics
DL/2 Normal DL/2 Log-Transformed
Mean in Original Scale 1.096 Mean in Log Scale -3.284
KM SD (logged) 2.758 95% Critical H Value (KM-Log) 4.998 KM Standard Error of Mean (logged) 0.509
KM SD (logged) 2.758 95% Critical H Value (KM-Log) 4.998 KM Standard Error of Mean (logged) 0.509 95% H-UCL (KM -Log) 21.43 When a data set follows an approximate (e.g., normal) distribution passing one of the GOF test When applicable, it is suggested to use a UCL based upon a distribution (e.g., gamma) passing both GOF tests in ProUCL Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.

Suggested UCL to Use
Gamma Adjusted KM-UCL (use when k<=1 and 15 < n < 50 but k<=1)

2.727
DL/2 is not a recommended method, provided for comparisons and historical reasons Nonparametric Distribution Free UCL Statistics
Detected Data appear Approximate Gamma Distributed at 5% Significance Level SD in Original Scale 2.637 SD in Log Scale 2.824
95% t UCL (Assumes normality) 1.9 95% H-Stat UCL 28.1
Recommendations are based upon data size, data distribution, and skewness.

These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).

However, simulations results will not cover all Real World data sets; for additional insight the user may want to consult a statistician.

42.221
ProUCL Output for Polycyclic Aromatic Hydrocarbons (PAHs) in Soil Lower Main Meadow Pogonip Open Space
501 Golf Club Drive, Santa Cruz, California

Page 29 of 34 ends

Number of Detects 9 Number of Non-Detects 22
Number of Distinct Detects 9 Number of Distinct Non-Detects 17 General Statistics
Total Number of Observations 31 Number of Distinct Observations 26

NAPHTHALENE
Median Detects 0.0141 CV Detects 2.695
Skewness Detects 2.976 Kurtosis Detects 8.889
Variance Detects 2.382 Percent Non-Detects 70.97%
Mean Detects 0.573 SD Detects 1.543
Minimum Detect 0.00491 Minimum Non-Detect 0.0213
Maximum Detect 4.68 Maximum Non-Detect 0.0251
Lilliefors Test Statistic 0.454 Lilliefors GOF Test
5% Lilliefors Critical Value 0.274 Detected Data Not Normal at 5% Significance Level Normal GOF Test on Detects Only
Shapiro Wilk Test Statistic 0.432 Shapiro Wilk GOF Test 5% Shapiro Wilk Critical Value 0.829 Detected Data Not Normal at 5% Significance Level Mean of Logged Detects -3.234 SD of Logged Detects 2.216 95% KM (z) UCL 0.431 95% KM Bootstrap t UCL 11.24
90% KM Chebyshev UCL 0.644 95% KM Chebyshev UCL 0.858
KM SD 0.825 95% KM (BCA) UCL 0.472
95% KM (t) UCL 0.44 95% KM (Percentile Bootstrap) UCL 0.467 Detected Data Not Normal at 5% Significance Level
Kaplan-Meier (KM) Statistics using Normal Critical Values and other Nonparametric UCLs KM Mean 0.173 KM Standard Error of Mean 0.157
K-S Test Statistic 0.348 Kolmogorov-Smirnov GOF
5% K-S Critical Value 0.304 Detected Data Not Gamma Distributed at 5% Significance Level Gamma GOF Tests on Detected Observations Only
A-D Test Statistic 1.346 Anderson-Darling GOF Test
5% A-D Critical Value 0.822 Detected Data Not Gamma Distributed at 5% Significance Level

97.5% KM Chebyshev UCL 1.154 99% KM Chebyshev UCL 1.736 Mean (detects) 0.573
Theta hat (MLE) 2.177 Theta star (bias corrected MLE) 2.296 nu hat (MLE) 4.737 nu star (bias corrected) 4.491
Detected Data Not Gamma Distributed at 5% Significance Level Gamma Statistics on Detected Data Only
k hat (MLE) 0.263 k star (bias corrected MLE) 0.25
Maximum 4.68 Median 0.01
SD 0.838 CV 4.835
For gamma distributed detected data, BTVs and UCLs may be computed using gamma distribution on KM estimates Minimum 0.00491 Mean 0.173
Gamma ROS Statistics using Imputed Non-Detects
GROS may not be used when data set has > 50% NDs with many tied observations at multiple DLs GROS may not be used when kstar of detects is small such as <1.0, especially when the sample size is small (e.g., <15-20) For such situations, GROS method may yield incorrect values of UCLs and BTVs This is especially true when the sample size is small.

Approximate Chi Square Value (17.21, α) 8.822 Adjusted Chi Square Value (17.21, β) 8.488 95% Gamma Approximate UCL (use when n>=50) 0.338 95% Gamma Adjusted UCL (use when n<50) 0.352 nu hat (MLE) 17.58 nu star (bias corrected) 17.21
Adjusted Level of Significance (β) 0.0413
k hat (MLE) 0.283 k star (bias corrected MLE) 0.278
Theta hat (MLE) 0.612 Theta star (bias corrected MLE) 0.625

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501 Golf Club Drive, Santa Cruz, California

Page 30 of 34 ends

nu hat (KM) 2.728 nu star (KM) 3.797
theta hat (KM) 3.932 theta star (KM) 2.825
Variance (KM) 0.68 SE of Mean (KM) 0.157
k hat (KM) 0.044 k star (KM) 0.0612
Estimates of Gamma Parameters using KM Estimates
Mean (KM) 0.173 SD (KM) 0.825
95% Gamma Approximate KM-UCL (use when n>=50) 1.021 95% Gamma Adjusted KM-UCL (use when n<50) 1.136 95% Gamma Adjusted KM-UCL (use when k<=1 and 15 < n < 50) Gamma Kaplan-Meier (KM) Statistics
Approximate Chi Square Value (3.80, α) 0.643 Adjusted Chi Square Value (3.80, β) 0.578 80% gamma percentile (KM) 0.0442 90% gamma percentile (KM) 0.332 95% gamma percentile (KM) 0.974 99% gamma percentile (KM) 3.459 Lognormal ROS Statistics Using Imputed Non-Detects
Mean in Original Scale 0.174 Mean in Log Scale -4.212
5% Lilliefors Critical Value 0.274 Detected Data appear Lognormal at 5% Significance Level Detected Data appear Lognormal at 5% Significance Level 5% Shapiro Wilk Critical Value 0.829 Detected Data appear Lognormal at 5% Significance Level Lilliefors Test Statistic 0.234 Lilliefors GOF Test
Lognormal GOF Test on Detected Observations Only
Shapiro Wilk Test Statistic 0.848 Shapiro Wilk GOF Test Statistics using KM estimates on Logged Data and Assuming Lognormal Distribution KM Mean (logged) -4.294 KM Geo Mean 0.0136
95% BCA Bootstrap UCL 0.626 95% Bootstrap t UCL 13.39
95% H-UCL (Log ROS) 0.0778
SD in Original Scale 0.838 SD in Log Scale 1.368
95% t UCL (assumes normality of ROS data) 0.43 95% Percentile Bootstrap UCL 0.475 DL/2 Statistics
DL/2 Normal DL/2 Log-Transformed
Mean in Original Scale 0.174 Mean in Log Scale -4.108
KM SD (logged) 1.35 95% Critical H Value (KM-Log) 2.87
KM Standard Error of Mean (logged) 0.291
KM SD (logged) 1.35 95% Critical H Value (KM-Log) 2.87
KM Standard Error of Mean (logged) 0.291 95% H-UCL (KM -Log) 0.0689 Suggested UCL to Use

97.5% KM (Chebyshev) UCL 1.154
DL/2 is not a recommended method, provided for comparisons and historical reasons Nonparametric Distribution Free UCL Statistics
Detected Data appear Lognormal Distributed at 5% Significance Level SD in Original Scale 0.838 SD in Log Scale 1.278
95% t UCL (Assumes normality) 0.43 95% H-Stat UCL 0.0711 Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.

Recommendations are based upon data size, data distribution, and skewness.

These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).

However, simulations results will not cover all Real World data sets; for additional insight the user may want to consult a statistician.

42.223
ProUCL Output for Polycyclic Aromatic Hydrocarbons (PAHs) in Soil Lower Main Meadow Pogonip Open Space
501 Golf Club Drive, Santa Cruz, California

Page 31 of 34 ends

Number of Detects 5 Number of Non-Detects 26
Number of Distinct Detects 5 Number of Distinct Non-Detects 19 1-METHYLNAPHTHALENE
General Statistics
Total Number of Observations 31 Number of Distinct Observations 24 Median Detects 0.0162 CV Detects 1.076
Skewness Detects 2.181 Kurtosis Detects 4.805
Variance Detects 7.9088E-4 Percent Non-Detects 83.87%
Mean Detects 0.0261 SD Detects 0.0281
Minimum Detect 0.0106 Minimum Non-Detect 0.0213
Maximum Detect 0.0762 Maximum Non-Detect 0.215
Lilliefors Test Statistic 0.433 Lilliefors GOF Test
5% Lilliefors Critical Value 0.343 Detected Data Not Normal at 5% Significance Level Normal GOF Test on Detects Only
Shapiro Wilk Test Statistic 0.638 Shapiro Wilk GOF Test 5% Shapiro Wilk Critical Value 0.762 Detected Data Not Normal at 5% Significance Level Mean of Logged Detects -3.969 SD of Logged Detects 0.807 95% KM (z) UCL 0.0202 95% KM Bootstrap t UCL 0.0229
90% KM Chebyshev UCL 0.0239 95% KM Chebyshev UCL 0.0277 KM SD 0.0116 95% KM (BCA) UCL 0.0206
95% KM (t) UCL 0.0204 95% KM (Percentile Bootstrap) UCL 0.0208 Detected Data Not Normal at 5% Significance Level
Kaplan-Meier (KM) Statistics using Normal Critical Values and other Nonparametric UCLs KM Mean 0.0157 KM Standard Error of Mean 0.00274
K-S Test Statistic 0.411 Kolmogorov-Smirnov GOF
5% K-S Critical Value 0.361 Detected Data Not Gamma Distributed at 5% Significance Level Gamma GOF Tests on Detected Observations Only
A-D Test Statistic 0.834 Anderson-Darling GOF Test
5% A-D Critical Value 0.686 Detected Data Not Gamma Distributed at 5% Significance Level

97.5% KM Chebyshev UCL 0.0328 99% KM Chebyshev UCL 0.043 Mean (detects) 0.0261
Theta hat (MLE) 0.0155 Theta star (bias corrected MLE) 0.0323 nu hat (MLE) 16.89 nu star (bias corrected) 8.089
Detected Data Not Gamma Distributed at 5% Significance Level Gamma Statistics on Detected Data Only
k hat (MLE) 1.689 k star (bias corrected MLE) 0.809
Maximum 0.0762 Median 0.0133
SD 0.0118 CV 0.722
For gamma distributed detected data, BTVs and UCLs may be computed using gamma distribution on KM estimates Minimum 0.01 Mean 0.0163
Gamma ROS Statistics using Imputed Non-Detects
GROS may not be used when data set has > 50% NDs with many tied observations at multiple DLs GROS may not be used when kstar of detects is small such as <1.0, especially when the sample size is small (e.g., <15-20) For such situations, GROS method may yield incorrect values of UCLs and BTVs This is especially true when the sample size is small.

Approximate Chi Square Value (264.15, α) 227.5 Adjusted Chi Square Value (264.15, β) 225.6 95% Gamma Approximate UCL (use when n>=50) 0.0189 95% Gamma Adjusted UCL (use when n<50) 0.0191 nu hat (MLE) 291 nu star (bias corrected) 264.2
Adjusted Level of Significance (β) 0.0413
k hat (MLE) 4.693 k star (bias corrected MLE) 4.261
Theta hat (MLE) 0.00347 Theta star (bias corrected MLE) 0.00383

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ProUCL Output for Polycyclic Aromatic Hydrocarbons (PAHs) in Soil Lower Main Meadow Pogonip Open Space
501 Golf Club Drive, Santa Cruz, California

Page 32 of 34 ends

nu hat (KM) 114.5 nu star (KM) 104.7
theta hat (KM) 0.00851 theta star (KM) 0.0093
Variance (KM) 1.3366E-4 SE of Mean (KM) 0.00274
k hat (KM) 1.847 k star (KM) 1.689
Estimates of Gamma Parameters using KM Estimates
Mean (KM) 0.0157 SD (KM) 0.0116
95% Gamma Approximate KM-UCL (use when n>=50) 0.02 95% Gamma Adjusted KM-UCL (use when n<50) 0.0203 Gamma Kaplan-Meier (KM) Statistics
Approximate Chi Square Value (104.75, α) 82.13 Adjusted Chi Square Value (104.75, β) 81.02 80% gamma percentile (KM) 0.024 90% gamma percentile (KM) 0.0318 95% gamma percentile (KM) 0.0393 99% gamma percentile (KM) 0.0562 Detected Data Not Lognormal at 5% Significance Level
Lognormal ROS Statistics Using Imputed Non-Detects
Mean in Original Scale 0.0164 Mean in Log Scale -4.208
Lilliefors Test Statistic 0.364 Lilliefors GOF Test
5% Lilliefors Critical Value 0.343 Detected Data Not Lognormal at 5% Significance Level Lognormal GOF Test on Detected Observations Only
Shapiro Wilk Test Statistic 0.762 Shapiro Wilk GOF Test 5% Shapiro Wilk Critical Value 0.762 Detected Data Not Lognormal at 5% Significance Level Statistics using KM estimates on Logged Data and Assuming Lognormal Distribution KM Mean (logged) -4.259 KM Geo Mean 0.0141
95% BCA Bootstrap UCL 0.0227 95% Bootstrap t UCL 0.0273 95% H-UCL (Log ROS) 0.018
SD in Original Scale 0.0115 SD in Log Scale 0.366
95% t UCL (assumes normality of ROS data) 0.0199 95% Percentile Bootstrap UCL 0.0203 DL/2 Statistics
DL/2 Normal DL/2 Log-Transformed
Mean in Original Scale 0.017 Mean in Log Scale -4.314
KM SD (logged) 0.373 95% Critical H Value (KM-Log) 1.838 KM Standard Error of Mean (logged) 0.129
KM SD (logged) 0.373 95% Critical H Value (KM-Log) 1.838 KM Standard Error of Mean (logged) 0.129 95% H-UCL (KM -Log) 0.0172 Suggested UCL to Use
95% KM (Chebyshev) UCL 0.0277
DL/2 is not a recommended method, provided for comparisons and historical reasons Nonparametric Distribution Free UCL Statistics
Data do not follow a Discernible Distribution at 5% Significance Level SD in Original Scale 0.0204 SD in Log Scale 0.522
95% t UCL (Assumes normality) 0.0232 95% H-Stat UCL 0.0185 Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.

Recommendations are based upon data size, data distribution, and skewness.

These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).

However, simulations results will not cover all Real World data sets; for additional insight the user may want to consult a statistician.

42.225
ProUCL Output for Polycyclic Aromatic Hydrocarbons (PAHs) in Soil Lower Main Meadow Pogonip Open Space
501 Golf Club Drive, Santa Cruz, California

Page 33 of 34 ends

Number of Detects 5 Number of Non-Detects 26
Number of Distinct Detects 5 Number of Distinct Non-Detects 19 2-METHYLNAPHTHALENE
General Statistics
Total Number of Observations 31 Number of Distinct Observations 23 Median Detects 0.0201 CV Detects 1.112
Skewness Detects 2.203 Kurtosis Detects 4.887
Variance Detects 0.00168 Percent Non-Detects 83.87%
Mean Detects 0.0369 SD Detects 0.041
Minimum Detect 0.0133 Minimum Non-Detect 0.0213
Maximum Detect 0.11 Maximum Non-Detect 0.215
Lilliefors Test Statistic 0.446 Lilliefors GOF Test
5% Lilliefors Critical Value 0.343 Detected Data Not Normal at 5% Significance Level Normal GOF Test on Detects Only
Shapiro Wilk Test Statistic 0.624 Shapiro Wilk GOF Test 5% Shapiro Wilk Critical Value 0.762 Detected Data Not Normal at 5% Significance Level Mean of Logged Detects -3.643 SD of Logged Detects 0.824 95% KM (z) UCL 0.0274 95% KM Bootstrap t UCL 0.035
90% KM Chebyshev UCL 0.0325 95% KM Chebyshev UCL 0.0377 KM SD 0.0168 95% KM (BCA) UCL 0.0278
95% KM (t) UCL 0.0276 95% KM (Percentile Bootstrap) UCL 0.0275 Detected Data Not Normal at 5% Significance Level
Kaplan-Meier (KM) Statistics using Normal Critical Values and other Nonparametric UCLs KM Mean 0.0212 KM Standard Error of Mean 0.00379
K-S Test Statistic 0.437 Kolmogorov-Smirnov GOF
5% K-S Critical Value 0.361 Detected Data Not Gamma Distributed at 5% Significance Level Gamma GOF Tests on Detected Observations Only
A-D Test Statistic 0.917 Anderson-Darling GOF Test
5% A-D Critical Value 0.686 Detected Data Not Gamma Distributed at 5% Significance Level

97.5% KM Chebyshev UCL 0.0448 99% KM Chebyshev UCL 0.0589 Mean (detects) 0.0369
Theta hat (MLE) 0.023 Theta star (bias corrected MLE) 0.0475 nu hat (MLE) 16.06 nu star (bias corrected) 7.755
Detected Data Not Gamma Distributed at 5% Significance Level Gamma Statistics on Detected Data Only
k hat (MLE) 1.606 k star (bias corrected MLE) 0.776
Maximum 0.11 Median 0.0152
SD 0.0175 CV 0.907
For gamma distributed detected data, BTVs and UCLs may be computed using gamma distribution on KM estimates Minimum 0.01 Mean 0.0193
Gamma ROS Statistics using Imputed Non-Detects
GROS may not be used when data set has > 50% NDs with many tied observations at multiple DLs GROS may not be used when kstar of detects is small such as <1.0, especially when the sample size is small (e.g., <15-20) For such situations, GROS method may yield incorrect values of UCLs and BTVs This is especially true when the sample size is small.

Approximate Chi Square Value (194.19, α) 163 Adjusted Chi Square Value (194.19, β) 161.4 95% Gamma Approximate UCL (use when n>=50) 0.023 95% Gamma Adjusted UCL (use when n<50) 0.0233 nu hat (MLE) 213.5 nu star (bias corrected) 194.2
Adjusted Level of Significance (β) 0.0413
k hat (MLE) 3.444 k star (bias corrected MLE) 3.132
Theta hat (MLE) 0.00561 Theta star (bias corrected MLE) 0.00617

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501 Golf Club Drive, Santa Cruz, California

Page 34 of 34 ends

nu hat (KM) 98.46 nu star (KM) 90.27
theta hat (KM) 0.0133 theta star (KM) 0.0145
Variance (KM) 2.8171E-4 SE of Mean (KM) 0.00379
k hat (KM) 1.588 k star (KM) 1.456
Estimates of Gamma Parameters using KM Estimates
Mean (KM) 0.0212 SD (KM) 0.0168
95% Gamma Approximate KM-UCL (use when n>=50) 0.0275 95% Gamma Adjusted KM-UCL (use when n<50) 0.0279 Gamma Kaplan-Meier (KM) Statistics
Approximate Chi Square Value (90.27, α) 69.36 Adjusted Chi Square Value (90.27, β) 68.34 80% gamma percentile (KM) 0.0328 90% gamma percentile (KM) 0.0444 95% gamma percentile (KM) 0.0557 99% gamma percentile (KM) 0.0811 Detected Data Not Lognormal at 5% Significance Level
Lognormal ROS Statistics Using Imputed Non-Detects
Mean in Original Scale 0.0213 Mean in Log Scale -3.959
Lilliefors Test Statistic 0.394 Lilliefors GOF Test
5% Lilliefors Critical Value 0.343 Detected Data Not Lognormal at 5% Significance Level Lognormal GOF Test on Detected Observations Only
Shapiro Wilk Test Statistic 0.751 Shapiro Wilk GOF Test 5% Shapiro Wilk Critical Value 0.762 Detected Data Not Lognormal at 5% Significance Level Statistics using KM estimates on Logged Data and Assuming Lognormal Distribution KM Mean (logged) -3.969 KM Geo Mean 0.0189
95% BCA Bootstrap UCL 0.0308 95% Bootstrap t UCL 0.0404 95% H-UCL (Log ROS) 0.0232
SD in Original Scale 0.0168 SD in Log Scale 0.373
95% t UCL (assumes normality of ROS data) 0.0264 95% Percentile Bootstrap UCL 0.0271 DL/2 Statistics
DL/2 Normal DL/2 Log-Transformed
Mean in Original Scale 0.0187 Mean in Log Scale -4.262
KM SD (logged) 0.376 95% Critical H Value (KM-Log) 1.84 KM Standard Error of Mean (logged) 0.125
KM SD (logged) 0.376 95% Critical H Value (KM-Log) 1.84 KM Standard Error of Mean (logged) 0.125 95% H-UCL (KM -Log) 0.023 Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.

Recommendations are based upon data size, data distribution, and skewness.

These recommendations are based upon the results of the simulation studies summarized in Singh, Maichle, and Lee (2006).

However, simulations results will not cover all Real World data sets; for additional insight the user may want to consult a statistician.

Suggested UCL to Use
95% KM (Chebyshev) UCL 0.0377
DL/2 is not a recommended method, provided for comparisons and historical reasons Nonparametric Distribution Free UCL Statistics
Data do not follow a Discernible Distribution at 5% Significance Level SD in Original Scale 0.0242 SD in Log Scale 0.574
95% t UCL (Assumes normality) 0.0261 95% H-Stat UCL 0.0205

42.227

APPENDIX C

FIELD DATASHEETS

42.228
SITE ADDRESS: 333 Golf Club Drive, Santa Cruz, CA
PROJECT NUMBER AND TASK: 01-POG-001 Task:2.2
LOGGED & SAMPLED BY: B. Angulo DATE: 8/3/21
BORING NUMBER: EM-34 TIME: 1230
Sample #
1245 0 NO AUG 02-44

0.5 NO AUG 02-45

1.0 NO AUG 02-46
1250 1.5 NO AUG 02-47

2.0 2.5

3.0 BORING NUMBER: EM-35 GPS COORDINATES: 36°59'32.50"N 122°2'10.30"W TIME: 1325 Sample #
1340 0 NO AUG 02-52
AUG 02-53

0.5 NO AUG 02-54

1.0 NO AUG 02-55
1345 1.5 NO AUG 02-56

2.0 2.5

3.0 BORING NUMBER: EM-36 TIME: 1200
Sample #
1215 0 NO AUG 02-38
AUG 02-39

0.5 NO AUG 02-40

1.0 NO AUG 02-41
1220 1.5 NO AUG 02-42

2.0 2.5

3.0 GPS COORDINATES: 36°59'32.00"N 122°2'9.99"W LOCATION ON SITE: East Meadow (SM) Silty sand, brown (10YR 5/3), moist, very loose, fine-grained sand, non-plastic, no odor. (SM) Silty sand, grayish brown (10YR 5/2), dry, very loose, fine-grained sand, non-plastic, no odor.

LOCATION ON SITE: East Meadow
End of boring at 2 feet bgs.

Backfill boring with soil cuttings.
1,822
1,631
485
48 147
Soil Description
Time
1,572
1,579
78 End of boring at 2 feet bgs.

Backfill boring with soil cuttings.
56 Depth
Sample Interval
Soil Description Lead shot
visible?
XRF Analysis
Lead Conc.
(ppm)
GPS COORDINATES: 36°59'33.03"N 122°2'10.96"W LOCATION ON SITE: East Meadow XRF Analysis
Depth
Sample Interval
Lead shot
visible? Lead Conc.
(ppm)
(SM) Silty sand, grayish brown (10YR 5/2), dry, very loose, fine-grained sand, non plastic, no odor.
48 25
64 End of boring at 2 feet bgs.

Backfill boring with soil cuttings.

Time
Depth
Sample Interval
Lead Conc.
(ppm)
Time
XRF Analysis Lead shot
visible? Soil Description
687
784

42.229
SITE ADDRESS: 333 Golf Club Drive, Santa Cruz, CA
PROJECT NUMBER AND TASK: 01-POG-001 Task:2.2
LOGGED & SAMPLED BY: B. Angulo DATE: 8/3/21
BORING NUMBER: EM-37 TIME: 1053
Sample #
1115
0 NO AUG 02-32
AUG 02-33

0.5 NO AUG 02-34

1.0 NO AUG 02-35
1120 1.5 NO AUG 02-36

2.0 2.5

3.0 BORING NUMBER: EM-38 GPS COORDINATES: 36°59'30.46"N 122°2'9.32"W TIME: 1014 Sample #
1045 0 NO AUG 02-28

0.5 NO AUG 02-29

1.0 NO AUG 02-30
1050 1.5 NO AUG 02-31

2.0 2.5

3.0 BORING NUMBER: EM-39 TIME: 0942
Sample #
1005 0 NO AUG 02-23

0.5 NO AUG 02-24

1.0 NO AUG 02-25
1010 1.5 NO AUG 02-27

2.0 2.5

3.0 GPS COORDINATES: 36°59'31.20"N 122°2'8.41"W LOCATION ON SITE: East Meadow (SW) Well graded sand, grayish brown (10YR 5/2), dry, very loose, fine-grained sand, nonplastic, no odor. (SW) Well graded sand with gravel, grayish brown (10YR 5/2), dry, very loose, fine-grained sand, coarse gravel, non-plastic, no odor.

LOCATION ON SITE: East Meadow
End of boring at 2 feet bgs.

Backfill boring with soil cuttings.
499
370
137
48 Soil Description
Time
519
214
End of boring at 2 feet bgs.

Backfill boring with soil cuttings.
13 Depth
Sample Interval
Soil Description Lead shot
visible?
XRF Analysis
Lead Conc.
(ppm)
GPS COORDINATES: 36°59'31.22"N 122°2'9.90"W LOCATION ON SITE: East Meadow XRF Analysis
Depth
Sample Interval
Lead shot
visible? Lead Conc.
(ppm)
(SW) Well graded sand with gravel, grayish brown (10YR 5/2), dry, very loose, fine-grained sand, coarse gravel, non-plastic, no odor.
39 211
285
End of boring at 2 feet bgs.

Backfill boring with soil cuttings.

Time
Depth
Sample Interval
Lead Conc.
(ppm)
Time
XRF Analysis Lead shot
visible? Soil Description
955
725
83 42.230
SITE ADDRESS: 333 Golf Club Drive, Santa Cruz, CA
PROJECT NUMBER AND TASK: 01-POG-001 Task:2.2
LOGGED & SAMPLED BY: B. Angulo DATE: 8/3/21
BORING NUMBER: EM-40 TIME: 0908
Sample #
0935 0 NO AUG 02-19

0.5 NO AUG 02-20

1.0 NO AUG 02-21
0940 1.5 NO AUG 02-22

2.0 2.5

3.0 BORING NUMBER: R-1 GPS COORDINATES: 36°59'35.38"N 122°2'14.95"W 8/4/21 TIME: 0720 Sample #
0745 0 NO AUG 02-66

0.5 NO AUG 02-67

1.0 NO AUG 02-68
0750 1.5 NO AUG 02-69

2.0 2.5

3.0 BORING NUMBER: R-2 8/4/21 TIME: 1044
Sample #
0 NO AUG 02-89
1055 0.5 NO AUG 02-90

1.0 NO AUG 02-91

1.5 NO AUG 02-92
1100 2.0

2.5 3.0
End of boring at 2 feet bgs.

Backfill boring with soil cuttings.

Time
Depth
Sample Interval
Lead Conc.
(ppm)
Time
XRF Analysis Lead shot
visible? Soil Description
245
125
18 4
4 XRF Analysis
Depth
Sample Interval
Lead shot
visible? Lead Conc.
(ppm)
(SM) Silty sand, grayish brown (10YR 5/2), moist, loose, fine-grained sand, non-plastic, no odor.

Mottled with yellowish red (5YR 4/6).

Soil Description
Time
28 21
End of boring at 2 feet bgs.

Backfill boring with soil cuttings.
16 Depth
Sample Interval
Soil Description Lead shot
visible?
XRF Analysis
Lead Conc.
(ppm)
GPS COORDINATES: 36°59'30.56"N 122°2'8.14"W LOCATION ON SITE: East Meadow 226
57 52
131
GPS COORDINATES: 36°59'34.62"N 122°2'13.35"W LOCATION ON SITE: Ravine (SW) Well graded sand, grayish brown (10YR 5/2), moist, very loose, fine-grained sand, medium to coarse gravel, non-plastic, no odor.
(SM) Silty sand, grayish brown (10YR 5/2), moist, very loose, fine-grained sand, non-plastic, no odor.

LOCATION ON SITE: Ravine
End of boring at 2 feet bgs.

Backfill boring with soil cuttings.

42.231
SITE ADDRESS: 333 Golf Club Drive, Santa Cruz, CA
PROJECT NUMBER AND TASK: 01-POG-001 Task:2.2
LOGGED & SAMPLED BY: B. Angulo DATE: 8/3/21
BORING NUMBER: R-3 TIME: 1300
Sample #
1315 0 NO AUG 02-48

0.5 NO AUG 02-49

1.0 NO AUG 02-50
1320 1.5 NO AUG 02-51

2.0 2.5

3.0 BORING NUMBER: R-4 GPS COORDINATES: 36°59'34.52"N 122°2'14.34"W 8/4/21 TIME: 0843 Sample #
0900 0 NO AUG 02-71
AUG 02-72

0.5 NO AUG 02-73

1.0 NO AUG 02-75
0905 1.5 NO AUG 02-76

2.0 2.5

3.0 BORING NUMBER: R-5 8/4/21 TIME: 1110
Sample #
1130 0 NO AUG 02-93

0.5 NO AUG 02-94

1.0 NO AUG 02-95
1135 1.5 NO AUG 02-96

2.0 2.5

3.0 GPS COORDINATES: 36°59'33.56"N 122°2'13.00"W LOCATION ON SITE: Ravine (SM) Silty sand, brown (10YR 5/3), moist, very loose, fine-grained sand, medium coarse gravel, non-plastic, no odor.
(SM) Silty sand, dark brown (10YR 3/3), moist, very loose, fine-grained sand, non-plastic, no odor.

LOCATION ON SITE: Ravine
End of boring at 2 feet bgs.

Backfill boring with soil cuttings.

Soil Description
Time
234
49 End of boring at 2 feet bgs.

Backfill boring with soil cuttings.
12 Depth
Sample Interval
Soil Description Lead shot
visible?
XRF Analysis
Lead Conc.
(ppm)
GPS COORDINATES: 36°59'33.96"N 122°2'11.99"W LOCATION ON SITE: Ravine XRF Analysis
Depth
Sample Interval
Lead shot
visible? Lead Conc.
(ppm)
(SM) Silty sand, grayish brown (10YR 5/2), dry, very loose, fine-grained sand, coarse gravel, non-plastic, no odor.
11 35
18 1,302
1,027
73 16
16 End of boring at 2 feet bgs.

Backfill boring with soil cuttings.

Time
Depth
Sample Interval
Lead Conc.
(ppm)
Time
XRF Analysis Lead shot
visible? Soil Description
810
19 42.232
SITE ADDRESS: 333 Golf Club Drive, Santa Cruz, CA
PROJECT NUMBER AND TASK: 01-POG-001 Task:2.2
LOGGED & SAMPLED BY: B. Angulo DATE: 8/3/21
BORING NUMBER: R-6 TIME: 1350
Sample #
1430 0 NO AUG 02-57

0.5 NO AUG 02-58

1.0 NO AUG 02-59
1435 1.5 NO AUG 02-60

2.0 2.5

3.0 BORING NUMBER: R-7 GPS COORDINATES: 36°59'30.97"N 122°2'10.64"W 8/4/21 TIME: 1414 Sample #
1440 0 NO AUG 02-
113

0.5 NO AUG 02-
114

1.0 NO AUG 02-
115
1445

1.5 NO AUG 02-
116

2.0 2.5

3.0 BORING NUMBER: R-8 8/4/21 TIME: 1312
Sample #
0 NO AUG 02-
105

0.5 NO AUG 02-
106
1325 1.0 NO AUG 02-
107
1330 1.5 NO AUG 02-
108

2.0 2.5

3.0 End of boring at 2 feet bgs.

Backfill boring with soil cuttings.

Time
Depth
Sample Interval
Lead Conc.
(ppm)
Time
XRF Analysis Lead shot
visible? Soil Description
628
540
155
98 93
454
151
22 33
XRF Analysis
Depth
Sample Interval
Lead shot
visible? Lead Conc.
(ppm)
(SW) Well graded sand with gravel, grayish brown (10YR 5/2), dry, very loose, fine-grained sand, coarse gravel, non-plastic, no odor. (20,80,0,0).

Soil Description
Time
67 79
End of boring at 2 feet bgs.

Backfill boring with soil cuttings.
290
Depth
Sample Interval
Soil Description Lead shot
visible?
XRF Analysis
Lead Conc.
(ppm)
GPS COORDINATES: 36°59'32.53"N 122°2'11.73"W LOCATION ON SITE: Ravine GPS COORDINATES: 36°59'29.35"N 122°2'10.32"W LOCATION ON SITE: Ravine (SW) Well graded sand with gravel, grayish brown (10YR 5/2), dry, very loose, fine-grained sand, non-plastic, no odor.
(SW) Well graded sand with gravel, grayish brown (10YR 5/2), dry, very loose, fine-grained sand, coarse gravel, non-plastic, no odor.

LOCATION ON SITE: Ravine
End of boring at 2 feet bgs.

Backfill boring with soil cuttings.

42.233
SITE ADDRESS: 333 Golf Club Drive, Santa Cruz, CA
PROJECT NUMBER AND TASK: 01-POG-001 Task:2.2
LOGGED & SAMPLED BY: B. Angulo DATE: 8/4/21
BORING NUMBER: R-9 TIME: 0908
Sample #
0920 0 NO AUG 02-77

0.5 NO AUG 02-78

1.0 NO AUG 02-79
0925 1.5 NO AUG 02-80

2.0 2.5

3.0 BORING NUMBER: R-10 GPS COORDINATES: 36°59'32.29"N 122°2'13.24"W TIME: 0926 Sample #
0935 0 NO AUG 02-81

0.5 NO AUG 02-82

1.0 NO AUG 02-83
0940 1.5 NO AUG 02-84

2.0 2.5

3.0 BORING NUMBER: R-11 TIME: 0949
Sample #
1000 0 NO AUG 02-85

0.5 NO AUG 02-86

1.0 NO AUG 02-87
1010 1.5 NO AUG 02-88

2.0 2.5

3.0 End of boring at 2 feet bgs.

Backfill boring with soil cuttings.

Time
Depth
Sample Interval
Lead Conc.
(ppm)
Time
XRF Analysis Lead shot
visible? Soil Description
182
31 6
6 20
86 23
5 3
XRF Analysis
Depth
Sample Interval
Lead shot
visible? Lead Conc.
(ppm)
(SM) Silty sand, dark brown (10YR 3/3), very loose, fine-grained sand, non-plastic, no odor.

Soil Description
Time
93 18
End of boring at 2 feet bgs.

Backfill boring with soil cuttings.
11 Depth
Sample Interval
Soil Description Lead shot
visible?
XRF Analysis
Lead Conc.
(ppm)
GPS COORDINATES: 36°59'33.35"N 122°2'14.40"W LOCATION ON SITE: Ravine GPS COORDINATES: 36°59'31.19"N 122°2'12.33"W LOCATION ON SITE: Ravine (SM) Silty sand, dark brown (10YR 3/3), moist, very loose, fine-grained sand, non-plastic, no odor.
(SM) Silty sand, dark brown (10YR 3/3), moist, very loose, fine-grained sand, non-plastic, no odor.

LOCATION ON SITE: Ravine
End of boring at 2 feet bgs.

Backfill boring with soil cuttings.

42.234
SITE ADDRESS: 333 Golf Club Drive, Santa Cruz, CA
PROJECT NUMBER AND TASK: 01-POG-001 Task:2.2
LOGGED & SAMPLED BY: B. Angulo DATE: 8/4/21
BORING NUMBER: R-12 TIME: 1337
Sample #
1405 0 NO AUG 02-109

0.5 NO AUG 02-110

1.0 NO AUG 02-111
1410 1.5 NO AUG 02-112

2.0 2.5

3.0 BORING NUMBER: R-13 GPS COORDINATES: 36°59'34.08"N 122°2'16.14"W 8/5/21 TIME: 0905 Sample #
0910 0 NO AUG 02-141

0.5 NO AUG 02-142

1.0 NO AUG 02-143
0915 1.5 NO AUG 02-144

2.0 2.5

3.0 BORING NUMBER: R-14 8/5/21 TIME: 1010
Sample #
1020 0 NO AUG 02-145
AUG 02-146

0.5 NO AUG 02-147

1.0 NO AUG 02-148
1030 1.5 NO AUG 02-149

2.0 2.5

3.0 GPS COORDINATES: 36°59'34.56"N 122°2'15.60"W LOCATION ON SITE: Ravine (SW) Well graded sand with gravel, grayish brown (10YR 5/2), moist, very loose, fine-grained sand, coarse gravel, non-plastic, no odor.
(SW) Well graded sand, grayish brown (10YR 5/2), dry, very loose, fine-grained sand, nonplastic, no odor.

LOCATION ON SITE: Ravine
End of boring at 2 feet bgs.

Backfill boring with soil cuttings.

Soil Description
Time
1,075
1,038
34 End of boring at 2 feet bgs.

Backfill boring with soil cuttings.
28 Depth
Sample Interval
Soil Description Lead shot
visible?
XRF Analysis
Lead Conc.
(ppm)
GPS COORDINATES: 36°59'29.90"N 122°2'11.64"W LOCATION ON SITE: Ravine XRF Analysis
Depth
Sample Interval
Lead shot
visible? Lead Conc.
(ppm)
(SW) Well graded sand, grayish brown (10YR 5/2), dry, very loose, fine-grained sand, coarse gravel, non-plastic, no odor.
50 6
6 741
69 22
17 End of boring at 2 feet bgs.

Backfill boring with soil cuttings.

Time
Depth
Sample Interval
Lead Conc.
(ppm)
Time
XRF Analysis Lead shot
visible? Soil Description
61 19

42.235
SITE ADDRESS: 333 Golf Club Drive, Santa Cruz, CA
PROJECT NUMBER AND TASK: 01-POG-001 Task:2.2
LOGGED & SAMPLED BY: B. Angulo DATE: 8/3/21
BORING NUMBER: T-1 TIME: 0800
Sample #
0900 0 NO AUG 02-15

0.5 NO AUG 02-16

1.0 NO AUG 02-17
0905 1.5 NO AUG 02-18

2.0 2.5

3.0 BORING NUMBER: T-2 GPS COORDINATES: 36°59'31.12"N 122°26'.55"W 8/4/21 TIME: 1228 Sample #
1240 0 NO AUG 02-97

0.5 NO AUG 02-98

1.0 NO AUG 02-99
1245 1.5 NO AUG 02-100

2.0 2.5

3.0 BORING NUMBER: T-3 8/4/21 TIME: 1248
Sample #
1305 0 NO AUG 02-101

0.5 NO AUG 02-102

1.0 NO AUG 02-103
1310 1.5 NO AUG 02-104

2.0 2.5

3.0 End of boring at 2 feet bgs.

Backfill boring with soil cuttings.

Time
Depth
Sample Interval
Lead Conc.
(ppm)
Time
XRF Analysis Lead shot
visible? Soil Description
19 15
11 31
8 XRF Analysis
Depth
Sample Interval
Lead shot
visible? Lead Conc.
(ppm)
(SW) Well graded sand with gravel, grayish brown (10YR 5/2), dry, very loose, fine-grained sand, coarse gravel, non-plastic, no odor.

Soil Description
Time
384
329
End of boring at 2 feet bgs.

Backfill boring with soil cuttings.
14 Depth
Sample Interval
Soil Description Lead shot
visible?
XRF Analysis
Lead Conc.
(ppm)
GPS COORDINATES: 36°59'31.12"N 122°26'.55"W LOCATION ON SITE: Emma McCrary Trail Area 23 9
5 6
GPS COORDINATES: 36°59'31.12"N 122°26'.55"W LOCATION ON SITE: Trail Area (SW) Well graded sand with gravel, grayish brown (10YR 5/2), dry, very loose, fine-grained sand, coarse gravel, non-plastic, no odor.
(SW) Well graded sand with gravel, grayish brown (10YR 5/2), dry, very loose, fine-grained sand, cobbles, non-plastic, no odor.

LOCATION ON SITE: Trail Area
End of boring at 2 feet bgs.

Backfill boring with soil cuttings.

42.236
SITE ADDRESS: 501 Golf Club Drive, Santa Cruz, CA
PROJECT NUMBER AND TASK: 01-POG-002 Task 1
LOGGED & SAMPLED BY: B. Angulo DATE:

BORING NUMBER: T-4 TIME: 0825
Sample #
0840 0 NO JAN 11-5

0.5 NO JAN 11-6

1.0 NO JAN 11-7
0845 1.5 NO JAN 11-8

2.0 2.5

3.0 BORING NUMBER: T-5 GPS COORDINATES: 36°59'468'N 122°02.136'W TIME: 0855 Sample #
0910 0 NO JAN 11-13

0.5 NO JAN 11-14

1.0 NO JAN 11-15
0915 1.5 NO JAN 11-16

2.0 2.5

3.0 BORING NUMBER: T-6 TIME: 0918
Sample #
0940 0 NO JAN 11-
19/20/21

0.5 NO JAN 11-22

1.0 NO JAN 11-23
0945 1.5 NO JAN 11-24

2.0 2.5

3.0 1/11/2022
GPS COORDINATES: 36°59.474'N 122°02.161'W
End of boring at 2 feet bgs.

Backfill boring with soil cuttings.
(SM) Silty sand, dark brown (7.5YR 3/2), loose, fine-grained sand, non-plastic, no odor, roots. (MH) Sandy silt, dark brown (7.5YR 3/2), soft, fine-grained sand, low plasticty, no odor, roots.

Wet.
(SM) Silty sand, very dark gray (7.5YR 3/1), moist, loose, fine-grained sand, non-plastic, no odor, roots.
(MH) Sandy silt, very dark gray (7.5YR 3/1), wet, soft, fine-grained sand, low plasticity, no odor, roots.

Soil Description
Time
152/489/91
22 End of boring at 2 feet bgs.

Backfill boring with soil cuttings.
15 Depth
Sample Interval
Soil Description Lead shot
visible?
XRF Analysis
Lead Conc.
(ppm)
GPS COORDINATES: 36°59.479'N 122°02.118'W LOCATION ON SITE: Emma McCrary Trail Area XRF Analysis
Depth
Sample Interval
Lead shot
visible? Lead Conc.
(ppm)
16 17
12 99
27 25
13 LOCATION ON SITE: Emma McCrary Trail Area
LOCATION ON SITE: Emma McCrary Trail Area
(SM) Silty sand, very dark gray (7.5YR 3/1), moist, loose, fine-grained sand, non-plastic, no odor.
(MH) Sandy silt, very dark gray (7.5YR 3/1), wet, soft, fine-grained sand, low plasticity, no odor.

End of boring at 2 feet bgs.

Backfill boring with soil cuttings.

Time
Depth
Sample Interval
Lead Conc.
(ppm)
Time
XRF Analysis Lead shot
visible? Soil Description
48 22

42.237
SITE ADDRESS: 501 Golf Club Drive, Santa Cruz, CA
PROJECT NUMBER AND TASK: 01-POG-002 Task 1
LOGGED & SAMPLED BY: B. Angulo DATE:

BORING NUMBER: T-7 TIME: 0947
Sample #
0955 0 NO JAN 11-25/26

0.5 NO JAN 11-27

1.0 NO JAN 11-28
1000 1.5 NO JAN 11-29

2.0 2.5

3.0 1/11/2022
Time
Depth
Sample Interval
Lead Conc.
(ppm)
XRF Analysis Lead shot
visible? Soil Description
107/82
54 14
End of boring at 2 feet bgs.

Backfill boring with soil cuttings.
33 GPS COORDINATES: 36°59.453'N 122°02.173'W LOCATION ON SITE: Emma McCrary Trail Area (ML) Sandy silt, dark brown (7.5YR 3/2), loose, soft, fine-grained sand, non-plastic, no odor. (MH) Sandy silt, dark brown (7.5YR 3/2), wet, soft, fine-grained sand, low plasticty, no odor.

42.238
SITE ADDRESS: 333 Golf Club Drive, Santa Cruz, CA
PROJECT NUMBER AND TASK: 01-POG-001 Task:2.2
LOGGED & SAMPLED BY: B. Angulo DATE: 8/5/21
BORING NUMBER: NO-13 TIME: 0828
Sample #
0840 0 NO AUG 02-133

0.5 NO AUG 02-134

1.0 NO AUG 02-135
0845 1.5 NO AUG 02-136

2.0 2.5

3.0 BORING NUMBER: NO-14 GPS COORDINATES: 36°59'34.93"N 122°2'18.55"W TIME: 0848 Sample #
0855 0 NO AUG 02-137

0.5 NO AUG 02-138

1.0 NO AUG 02-139
0900 1.5 NO AUG 02-140

2.0 2.5

3.0 LOCATION ON SITE: North Orchard
End of boring at 2 feet bgs.

Backfill boring with soil cuttings.
(SM) Silty sand, grayish brown (10YR 5/2), dry, very loose, fine-grained sand, non-plastic, no odor.
(SW) Well graded sand, grayish brown (10YR 5/2), dry, very loose, fine-grained sand, non plastic, no odor. (10,80,10,0).

End of boring at 2 feet bgs.

Backfill boring with soil cuttings.
3 Depth
Sample Interval
Soil Description Lead shot
visible?
XRF Analysis
Lead Conc.
(ppm)
GPS COORDINATES: 36°59'35.93"N 122°2'18.18"W LOCATION ON SITE: North Orchard 3 56
19 5
4 Time
Depth
Sample Interval
Lead Conc.
(ppm)
Time
XRF Analysis Lead shot
visible? Soil Description
14 3

42.239
SITE ADDRESS: 333 Golf Club Drive, Santa Cruz, CA
PROJECT NUMBER AND TASK: 01-POG-001 Task:2.2
LOGGED & SAMPLED BY: B. Angulo DATE: 8/5/21
BORING NUMBER: WM-16 TIME: 0755
Sample #
0800 0 NO AUG 02-129

0.5 NO AUG 02-130

1.0 NO AUG 02-131
0805 1.5 NO AUG 02-132

2.0 2.5

3.0 BORING NUMBER: WM-17 GPS COORDINATES: 36°59'32.64"N 122°2'21.09"W TIME: 0738 Sample #
0745 0 NO AUG 02-125

0.5 NO AUG 02-126

1.0 NO AUG 02-127
0750 1.5 NO AUG 02-128

2.0 2.5

3.0 LOCATION ON SITE: West Meadow
End of boring at 2 feet bgs.

Backfill boring with soil cuttings.
(SM) Silty sand, grayish brown (10YR 5/2), dry, very loose, fine-grained sand, non-plastic, no odor.
(SM) Silty sand, grayish brown (10YR 5/2), moist, loose, fine-grained sand, non-plastic, no odor.

Very dark grayish brown (10YR 3/2).

End of boring at 2 feet bgs.

Backfill boring with soil cuttings.
5 Depth
Sample Interval
Soil Description Lead shot
visible?
XRF Analysis
Lead Conc.
(ppm)
GPS COORDINATES: 36°59'33.22"N 122°2'19.72"W LOCATION ON SITE: West Meadow 6 18
7 ND
3 Time
Depth
Sample Interval
Lead Conc.
(ppm)
Time
XRF Analysis Lead shot
visible? Soil Description
133
6 42.240

APPENDIX D

XRF DATA

42.241
Data Acquisition: Olympus Vanta XRF Analyzer Instrument Serial Number: 800777

Page 1 of 3 ends

Santa Cruz City CouncilJune 28, 2022

Santa Cruz City Council
June 28, 2022