NAVAL AIR STATION PENSACOLA - CORRY STATION

Environmental Restoration Program Public Website

SAMPLING PFAS IN PRIVATE DRINKING WATER WELLS NEAR CORRY STATION

Certain PFAS have been detected in groundwater at Corry Station above the DoD PFAS interim action levels for private drinking water wells. The Navy previously established a sampling area 1 mile in the direction that groundwater flows away from the installation boundary. The Navy is offering sampling to all property owners whose property is within the sampling area (Figure 2) and whose drinking water is supplied by a private drinking water well that has not yet been sampled by the Navy.

Records indicate that some properties within the sampling area obtain drinking water from public water supplier Emerald Coast Utilities Authority. If your drinking water is provided by Emerald Coast Utilities Authority or another public water system, the Navy does not need to sample your drinking water.

The Navy has reevaluated the 2022 off-base private drinking water well results using the DoD PFAS interim action levels for private drinking water wells (Table 1). At Corry Station, there are 6 wells (5 private) that are at or above DoD PFAS interim action levels. The Navy is contacting each of these property owners to request permission and begin implementation of an interim action.

2022 PRIVATE DRINKING WATER WELL SAMPLING

The Navy sampled private drinking water wells at Corry Station in 2022. The sampling area for Corry Station (Figure 2), was established 1 mile in the direction that groundwater flows away from the installation boundary. Table 2 provides a summary of the results of the sampling. Table 3 presents the PFAS results. Near Corry Station, there were no detections of PFOA and/or PFOS above 70 ppt, the Navy’s action level at the time.

The Navy has reevaluated the 2022 off-base private drinking water well results using the DoD PFAS interim action levels for private drinking water wells (Table 1); the results of this evaluation are shown in Table 2. At Corry Station, there are 6 wells that are at or above DoD PFAS interim action levels.

Table 2: Corry Station 2022 Private Drinking Water Well Results Summary

Number of Wells Sampled	Number of wells with no detections of PFOA or PFOS	Number of wells with detections of PFOA and/or PFOS below 70 ppt*	Number of wells with detections of PFAS below the DoD PFAS interim action levels	Number of wells with detections of PFAS at or above DoD PFAS interim action levels
12	0	12	6	6

*70 ppt for PFOA and PFOS, individually or combined, was the Navy's action level at the time of this sampling.

Table 3: Corry Station 2022 Private Drinking Water Well Results

Sample	PFOA (ppt)	PFOS (ppt)	PFOA+PFOS (ppt)	PFNA (ppt)	PFHxS (ppt)	HFPO-DA (ppt)	PFBS (ppt)	Hazard Index
1	9.72	21.7	31.42	0.613 J	7	ND	3.08	0.76
2	1.79 J	1.43 J	3.22	ND	1.2 J	ND	0.564 J	0.12
3	10.6	50.9	61.5	1.95 J	3.83	ND	5.41	0.58
4	7.83	17.4	25.23	ND	5.31	ND	2.89	0.53
5	2.09 J	6.73	8.8	ND	2.94	ND	0.593 J	0.29
6	10.7	25.2	35.9	0.548 J	9.6	ND	3.62	1.02
7	2.12 J	2.3 J	4.42	ND	1.3 J	ND	ND	0.13
8	1.98 J	7.71	9.69	ND	4.22	ND	0.67 J	0.42
9	11.5	21.6	33.1	0.693 J	5.07	ND	2.46	0.58
10	0.48 J	0.759 J	1.239	ND	0.713 J	ND	0.677 J	0.07
11	7.61	45.7	53.31	1.13 J	2.36	ND	3.98	0.35
12	1.76 J	9.04	10.8	ND	0.483 J	ND	ND	0.05

HI - Hazard Index. EPA Hazard Index Fact Sheet
ND - not detected
NC - hazard index not calculated because no PFAS were detected
NS - not sampled
J - laboratory estimated value

Figure 2: Private Drinking Water Well Sampling Area – Corry Station

IDENTIFICATION OF PFAS RELEASES AT CORRY STATION

The PFAS Preliminary Assessment (PA) that identified areas where releases of PFAS may have occurred was finalized in 2021 (Tetra Tech, 2021). Based on the results of the PFAS PA, the PFAS Site Inspection (SI) was finalized in 2023 for Corry Station (Tetra Tech, 2023). Sample collection and analysis of groundwater, surface water, and soil were conducted from September to November 2021 at Corry Station.

PFAS were found in groundwater and soil at Corry Station. The PFAS release areas that were investigated during the SI are depicted on Figure 3 and listed below. The Navy will continue investigating PFAS at Corry Station following the CERCLA process and will evaluate if actions are needed.

PFAS Release Areas – Corry Station