E1M7: Waste Treatment (Double Impact)

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Double Impact maps
This level occupies the map slot E1M7. For other maps which occupy this slot, see Category:E1M7.
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E1M7: Waste Treatment is the seventh map of Double Impact. It was designed by Matt Cibulas (RottKing) and Ralph Vickers (Ralphis). The par time defined in the DMAPINFO lump of the edition released as official add-on is 25:20.


Map of Waste Treatment
Letters in italics refer to marked spots on the map. Sector, thing, and linedef numbers in boldface are secrets which count toward the end-of-level tally.


Other points of interest[edit]


  1. At the start, open the gray wall with slime on it to get a green armor and a backpack. (sector 4)
  2. In the open room where the blue keycard is, walk up the steps on the west side and head outside. Go onto the railing here, facing right, and jump through the window back into the previous room. You will notice that a wall has lowered. This wall hides an ammo clip, a backpack, a medikit, and a blur artifact. (sector 103)
  3. When you reach the large outdoor section with the nukage, run across the nukage to the fence at the east end. Walk around the end of the fence and drop to the ledge with the teleporter. The teleporter takes you to a ledge with two rockets, two stimpacks, and a megaarmor. Note that if you had flipped the switch which lowers the nukage levels, it is still possible to access the teleporter. There is a small snippet of ledge you can sidle on next to the lift that leads out of the nukage, and you can use that to reach the teleporter. (sector 156)
  4. After flipping the switch that lowers the nukage levels, return to the room where Secret #5 is. Now enter the nukage at the east end and take the next lift up to a soul sphere and four rockets. (sector 310)
  5. From the starting point, head down the steps dead ahead. At the fork, go left, and through the next door, turn left again. To your right is a tech lamp, and straight ahead is a lift. Approaching the tech lamp lowers a wall somewhere at the top of the lift. You will need to activate the lift, wait a bit, then run towards the lamp and then go up the lift. From the top, head through the passage going south and then quickly through the opening where the rocket launcher is before it rises. A soul sphere and some ammo are in this room. (sector 320)
  6. Open the blue door once you have the key and then go past two lighted sections in the hallway. When you do so, immediately turn left and follow a hidden passage to a switch. Now flip it and go back a bit to find a plasma gun. Make sure to reach this before the wall rises again. (sector 394)
  7. In the circular area south of the blue key room, go to the south side of this room and go off the lift here. At the end, hit the switch to lower the wall, and at the next dead end, open the bit of the wall that looks different from the rest. You will reveal a switch, use it then backtrack to the circular hallway from before. On the west side, a wall is open revealing a lift taking you down to armor bonuses, a medikit, and some ammo. (sector 709)
  8. In the hall with the eye switch (the one that is directly west of where the red key is located and requires said key), you can open the wall with the UAC logo on it to reach a small room where a zombieman guards some supplies, including a chainsaw, two stimpacks, two armor bonuses, a backpack, two rockets, and shotgun shells. (sector 880)
  9. At the outdoor portion of the map close to the exit, there is a section of the green wall to the northeast that is slightly damaged. Open this wall to find two boxes of rockets and an energy cell. (sector 900)
  10. Past the yellow door, take the lift up to the next level and go south past the terminal to the two windows. Notice that the second window has a green streak instead of a brown one. You can lower this window, then jump to the berserk pack. (sector 901)


Demo files[edit]

Areas / screenshots[edit]


Routes and tricks[edit]

Current records[edit]

The records for the map at the Doom Speed Demo Archive are:

Run Time Player Date File Notes
UV speed
NM speed
UV max 16:07.29 Boris Klimeš (dew) 2013-01-20 d1i7-1607.zip
NM 100S
UV -fast
UV -respawn
UV Tyson
UV pacifist

The data was last verified in its entirety on December 9, 2021.


Player spawns[edit]

This level contains seventeen spawn points:

  1. facing north-west. (thing 1094)
  2. facing south. (thing 1095)
  3. facing south-west. (thing 1096)
  4. facing north. (thing 1097)
  5. facing north-west. (thing 1098)
  6. facing north. (thing 1099)
  7. facing east. (thing 1100)
  8. facing south-east. (thing 1101)
  9. facing north-east. (thing 1103)
  10. facing east. (thing 1104)
  11. facing north. (thing 1105)
  12. facing south-east. (thing 1106)
  13. facing south. (thing 1109)
  14. facing north. (thing 1110)
  15. facing north. (thing 1111)
  16. facing south-west. (thing 1113)
  17. facing north. (thing 1115)


Map data[edit]

Things 1194
Vertices 5314*
Linedefs 5356
Sidedefs 7945
Sectors 1004
* The vertex count without the effect of node building is 4295.


This level contains the following numbers of things per skill level:

Technical information[edit]

Inspiration and development[edit]


See also[edit]


External links[edit]