"....from the regiment's honor roll:
S t o r m A u g u s t, Füsl., geb. 29. 1. 91, Hollenbeck, Lauenburg, gef. 19. 8. 14, Vallerystal
this could well be him, despite the slight difference in date. The regimental history briefly mentions the events of Aug. 19, which involved 7. Komp., and the locations mentioned are only several kilometres from the cemetery:
August Storm ruht auf der Kriegsgräberstätte in Plaine-de-Walsch.
Endgrablage: Grab 25
In short, after years of searching - we were given the place of August Storm's burial spot!