diff --git a/code/ATMOSPHERICS/atmospherics.dm b/code/ATMOSPHERICS/atmospherics.dm
index 953988cf929..3d0a829d875 100644
--- a/code/ATMOSPHERICS/atmospherics.dm
+++ b/code/ATMOSPHERICS/atmospherics.dm
@@ -93,6 +93,7 @@ Pipelines + Other Objects -> Pipe network
 				"[user] unfastens \the [src].", \
 				"<span class='notice'>You have unfastened \the [src].</span>", \
 				"You hear ratchet.")
+			investigate_log("was <span class='warning'>REMOVED</span> by [key_name(usr)]", "atmos")
 			Deconstruct()
 	else
 		return ..()
diff --git a/code/ATMOSPHERICS/components/binary_devices/passive_gate.dm b/code/ATMOSPHERICS/components/binary_devices/passive_gate.dm
index 36d74069cd1..240057ed6eb 100644
--- a/code/ATMOSPHERICS/components/binary_devices/passive_gate.dm
+++ b/code/ATMOSPHERICS/components/binary_devices/passive_gate.dm
@@ -107,6 +107,8 @@ Passive gate is similar to the regular pump except:
 	if(!signal.data["tag"] || (signal.data["tag"] != id) || (signal.data["sigtype"]!="command"))
 		return 0
 
+	var/old_on = on //for logging
+
 	if("power" in signal.data)
 		on = text2num(signal.data["power"])
 
@@ -120,6 +122,9 @@ Passive gate is similar to the regular pump except:
 			ONE_ATMOSPHERE*50
 		)
 
+	if(on != old_on)
+		investigate_log("was turned [on ? "on" : "off"] by a remote signal", "atmos")
+
 	if("status" in signal.data)
 		spawn(2)
 			broadcast_status()
@@ -147,8 +152,10 @@ Passive gate is similar to the regular pump except:
 	if(..()) return
 	if(href_list["power"])
 		on = !on
+		investigate_log("was turned [on ? "on" : "off"] by [key_name(usr)]", "atmos")
 	if(href_list["set_press"])
 		target_pressure = max(0, min(4500, safe_input("Pressure control", "Enter new output pressure (0-4500kPa)", target_pressure)))
+		investigate_log("was set to [target_pressure] kPa by [key_name(usr)]", "atmos")
 	usr.set_machine(src)
 	src.update_icon()
 	src.updateUsrDialog()
diff --git a/code/ATMOSPHERICS/components/binary_devices/pump.dm b/code/ATMOSPHERICS/components/binary_devices/pump.dm
index 77508a31c7d..464b37fef82 100644
--- a/code/ATMOSPHERICS/components/binary_devices/pump.dm
+++ b/code/ATMOSPHERICS/components/binary_devices/pump.dm
@@ -115,6 +115,8 @@ Thus, the two variables affect pump operation are set in New():
 	if(!signal.data["tag"] || (signal.data["tag"] != id) || (signal.data["sigtype"]!="command"))
 		return 0
 
+	var/old_on = on //for logging
+
 	if("power" in signal.data)
 		on = text2num(signal.data["power"])
 
@@ -128,6 +130,9 @@ Thus, the two variables affect pump operation are set in New():
 			ONE_ATMOSPHERE*50
 		)
 
+	if(on != old_on)
+		investigate_log("was turned [on ? "on" : "off"] by a remote signal", "atmos")
+
 	if("status" in signal.data)
 		spawn(2)
 			broadcast_status()
@@ -154,8 +159,10 @@ Thus, the two variables affect pump operation are set in New():
 	if(..()) return
 	if(href_list["power"])
 		on = !on
+		investigate_log("was turned [on ? "on" : "off"] by [key_name(usr)]", "atmos")
 	if(href_list["set_press"])
 		target_pressure = max(0, min(4500, safe_input("Pressure control", "Enter new output pressure (0-4500kPa)", target_pressure)))
+		investigate_log("was set to [target_pressure] kPa by [key_name(usr)]", "atmos")
 	usr.set_machine(src)
 	src.update_icon()
 	src.updateUsrDialog()
diff --git a/code/ATMOSPHERICS/components/binary_devices/volume_pump.dm b/code/ATMOSPHERICS/components/binary_devices/volume_pump.dm
index edd5b7bb3d5..1ed309c8919 100644
--- a/code/ATMOSPHERICS/components/binary_devices/volume_pump.dm
+++ b/code/ATMOSPHERICS/components/binary_devices/volume_pump.dm
@@ -113,6 +113,8 @@ Thus, the two variables affect pump operation are set in New():
 	if(!signal.data["tag"] || (signal.data["tag"] != id) || (signal.data["sigtype"]!="command"))
 		return 0
 
+	var/old_on = on //for logging
+
 	if("power" in signal.data)
 		on = text2num(signal.data["power"])
 
@@ -126,6 +128,9 @@ Thus, the two variables affect pump operation are set in New():
 			air1.volume
 		)
 
+	if(on != old_on)
+		investigate_log("was turned [on ? "on" : "off"] by a remote signal", "atmos")
+
 	if("status" in signal.data)
 		spawn(2)
 			broadcast_status()
@@ -151,8 +156,10 @@ Thus, the two variables affect pump operation are set in New():
 	if(..()) return
 	if(href_list["power"])
 		on = !on
+		investigate_log("was turned [on ? "on" : "off"] by [key_name(usr)]", "atmos")
 	if(href_list["set_transfer_rate"])
 		transfer_rate = max(0, min(200, safe_input("Pressure control", "Enter new output pressure (0-4500kPa)", transfer_rate)))
+		investigate_log("was set to [transfer_rate] L/s by [key_name(usr)]", "atmos")
 	usr.set_machine(src)
 	src.update_icon()
 	src.updateUsrDialog()
diff --git a/code/ATMOSPHERICS/components/valve.dm b/code/ATMOSPHERICS/components/valve.dm
index 9685f0ba257..a3e3a7fc68c 100644
--- a/code/ATMOSPHERICS/components/valve.dm
+++ b/code/ATMOSPHERICS/components/valve.dm
@@ -38,11 +38,13 @@
 	update_icon_nopipes()
 	parent1.update = 0
 	parent2.update = 0
+	investigate_log("was opened by [usr ? key_name(usr) : "a remote signal"]", "atmos")
 	return
 
 /obj/machinery/atmospherics/binary/valve/proc/close()
 	open = 0
 	update_icon_nopipes()
+	investigate_log("was closed by [usr ? key_name(usr) : "a remote signal"]", "atmos")
 	return
 
 /obj/machinery/atmospherics/binary/valve/proc/normalize_dir()
diff --git a/code/game/machinery/atmoalter/canister.dm b/code/game/machinery/atmoalter/canister.dm
index a097f9090ab..f6ef51806dc 100644
--- a/code/game/machinery/atmoalter/canister.dm
+++ b/code/game/machinery/atmoalter/canister.dm
@@ -128,6 +128,7 @@ update_flag
 		playsound(src.loc, 'sound/effects/spray.ogg', 10, 1, -3)
 		src.density = 0
 		update_icon()
+		investigate_log("was destroyed by heat/gunfire.", "atmos")
 
 		if (src.holding)
 			src.holding.loc = src.loc
@@ -229,6 +230,7 @@ update_flag
 /obj/machinery/portable_atmospherics/canister/attackby(var/obj/item/weapon/W as obj, var/mob/user as mob)
 	if(!istype(W, /obj/item/weapon/wrench) && !istype(W, /obj/item/weapon/tank) && !istype(W, /obj/item/device/analyzer) && !istype(W, /obj/item/device/pda))
 		visible_message("<span class='danger'>[user] hits \the [src] with a [W]!</span>")
+		investigate_log("was smacked with \a [W] by [key_name(user)]", "atmos")
 		src.health -= W.force
 		src.add_fingerprint(user)
 		healthcheck()
@@ -294,16 +296,22 @@ Release Pressure: <A href='?src=\ref[src];pressure_adj=-1000'>-</A> <A href='?sr
 		usr.set_machine(src)
 
 		if(href_list["toggle"])
+			var/logmsg
 			if (valve_open)
 				if (holding)
-					release_log += "Valve was <b>closed</b> by [usr] ([usr.ckey]), stopping the transfer into the [holding]<br>"
+					logmsg = "Valve was <b>closed</b> by [key_name(usr)], stopping the transfer into the [holding]<br>"
 				else
-					release_log += "Valve was <b>closed</b> by [usr] ([usr.ckey]), stopping the transfer into the <font color='red'><b>air</b></font><br>"
+					logmsg = "Valve was <b>closed</b> by [key_name(usr)], stopping the transfer into the <span class='userdanger'>air</span><br>"
 			else
 				if (holding)
-					release_log += "Valve was <b>opened</b> by [usr] ([usr.ckey]), starting the transfer into the [holding]<br>"
+					logmsg = "Valve was <b>opened</b> by [key_name(usr)], starting the transfer into the [holding]<br>"
 				else
-					release_log += "Valve was <b>opened</b> by [usr] ([usr.ckey]), starting the transfer into the <font color='red'><b>air</b></font><br>"
+					logmsg = "Valve was <b>opened</b> by [key_name(usr)], starting the transfer into the <span class='userdanger'>air</span><br>"
+					if(air_contents.toxins > 0)
+						message_admins("[key_name(usr)] (<A HREF='?_src_=holder;adminmoreinfo=\ref[usr]'>?</A>) opened a canister that contains plasma! (<A HREF='?_src_=holder;adminplayerobservecoodjump=1;X=[x];Y=[y];Z=[z]'>JMP</a>)")
+						log_admin("[key_name(usr)] opened a canister that contains plasma at [x], [y], [z]")
+			investigate_log(logmsg, "atmos")
+			release_log += logmsg
 			valve_open = !valve_open
 
 		if (href_list["remove_tank"])
diff --git a/code/modules/admin/admin_investigate.dm b/code/modules/admin/admin_investigate.dm
index 7b128727942..3f88d8c4f62 100644
--- a/code/modules/admin/admin_investigate.dm
+++ b/code/modules/admin/admin_investigate.dm
@@ -22,12 +22,12 @@
 	F << "<small>[time2text(world.timeofday,"hh:mm")] \ref[src] ([x],[y],[z])</small> || [src] [message]<br>"
 
 //ADMINVERBS
-/client/proc/investigate_show( subject in list("hrefs","notes","ntsl","singulo","wires","telesci", "gravity", "records", "cargo", "supermatter") )
+/client/proc/investigate_show( subject in list("hrefs","notes","ntsl","singulo","wires","telesci", "gravity", "records", "cargo", "supermatter", "atmos") )
 	set name = "Investigate"
 	set category = "Admin"
 	if(!holder)	return
 	switch(subject)
-		if("singulo", "ntsl", "wires", "telesci", "gravity", "records", "cargo", "supermatter")			//general one-round-only stuff
+		if("singulo", "ntsl", "wires", "telesci", "gravity", "records", "cargo", "supermatter", "atmos")			//general one-round-only stuff
 			var/F = investigate_subject2file(subject)
 			if(!F)
 				src << "<font color='red'>Error: admin_investigate: [INVESTIGATE_DIR][subject] is an invalid path or cannot be accessed.</font>"