maybe moisture from the earth below will screw this up if your slab is
not insulated. pressure washing will drive moisture into the slab but
how else can you clean it. so allow plenty of drying out time in warm
weather.
for now bleach and hose the floor and use this organic neutralizer we
like their cherry almond stuff from grainger:
http://www.grainger.com/Grainger/wwg...7090&cc item=

RAMSEY
# KIL-ODER CHERRY/ALMOND