12 /8 /2020 Centra lTucson PFAS Pro ject CTPP Work P lan -Po ten tia lADEQ Mon itoring We ll R 0 0 .5 1 0 .25 M iles E D Davis Monthan A ir Force Base 22nd St Broadway B lvd A lvernon Way Swan Rd Country C lub Rd K ino Environmental Restoration Project (KERP) Active Tucson Wa terDW We ll Surface Wa terD ra inage Tucson Wa terDW We llRemoved from Serv ice PFOA+PFOS >70 pp t** PFAS = per-and po lyfluorina ted a lky lsubstances PFOA = perfluorooctano ic ac id PFOS = perfluorooctane su lfon ic ac id **Con tours represen tthe estima ted area o fgroundwa tercurren tly known to exceed the USEPA Hea lth Adv isory Leve l(HAL)o f70 parts pertrillion (pp t)forthe comb ined concen tra tion o fPFOA and PFOS Approx ima te G roundwa ter F low D irection (CTPP ) DW = D rink ing Wa ter 210
**Contours represent the estimated area of groundwater currently
known to exceed the USEPA HealthAdvisory Level (HAL) of 70 parts
per trillion (ppt) for the combined concentration of PFOA and
PFOS
