Midwest Subsurface Testing, L.L.C.

Form 5500

MIDWEST SUBSURFACE TESTING, L.L.C.

8606 Page Avenue, St. Louis, Mo 63114 (314) 739-2727 EIN:02-0536635 Plan Admin:Joan Laughlin

Year	Plan Name	Participants BOY/EOY	Assets BOY/EOY
2023	Plan NameMIDWEST SUBSURFACE TESTING, L.L.C. 401(K) PROFIT SHARING PLAN Plan #002 Participants BOY/EOY27 / 22 Assets BOY/EOY$3,114,152 / $3,714,985	2023	MIDWEST SUBSURFACE TESTING, L.L.C. 401(K) PROFIT SHARING PLAN - Plan #002	27 / 22	$3,114,152 / $3,714,985
2022	Plan NameMIDWEST SUBSURFACE TESTING, L.L.C. 401(K) PROFIT SHARING PLAN Plan #002 Participants BOY/EOY21 / 24 Assets BOY/EOY$3,606,484 / $3,114,152	2022	MIDWEST SUBSURFACE TESTING, L.L.C. 401(K) PROFIT SHARING PLAN - Plan #002	21 / 24	$3,606,484 / $3,114,152
2021	Plan NameMIDWEST SUBSURFACE TESTING, L.L.C. 401(K) PROFIT SHARING PLAN Plan #002 Participants BOY/EOY17 / 19 Assets BOY/EOY$3,025,274 / $3,606,484	2021	MIDWEST SUBSURFACE TESTING, L.L.C. 401(K) PROFIT SHARING PLAN - Plan #002	17 / 19	$3,025,274 / $3,606,484
2020	Plan NameMIDWEST SUBSURFACE TESTING, L.L.C. 401(K) PROFIT SHARING PLAN Plan #002 Participants BOY/EOY18 / 16 Assets BOY/EOY$2,956,277 / $3,025,274	2020	MIDWEST SUBSURFACE TESTING, L.L.C. 401(K) PROFIT SHARING PLAN - Plan #002	18 / 16	$2,956,277 / $3,025,274
2019	Plan NameMIDWEST SUBSURFACE TESTING, L.L.C. 401(K) PROFIT SHARING PLAN Plan #002 Participants BOY/EOY19 / 18 Assets BOY/EOY$2,249,916 / $2,956,277	2019	MIDWEST SUBSURFACE TESTING, L.L.C. 401(K) PROFIT SHARING PLAN - Plan #002	19 / 18	$2,249,916 / $2,956,277