If I clean up concrete contaminated by a post-1987 spill pursuant to state clean-up standards, can I continue to use the concrete? If not, what are the requirements?

No. Mineral oil is harmless.

definitely not a television question
commercial or residential ?
If clean up was done to state regs that concrete is good for any use
just in case
define contaminated
hazardous , carcinogenic ,nuclear, bio hazard
solid concrete slab poured post 1986 will have reo
if sound condition can be used, painted over, carpeted .sealed , tiled.what ever
if cracked up due to demolition
still ok to use for land fill or other rubble type back fill

BIG NO
any contaminated pipes can not be used for any purpose after internal surface has been compromised ..
not plastic, copper ,steel ,concrete or any other material
has to be disposed of meeting the strict / local /states/govt regulatory requirement s

Better Ceramic Floor Tiles where can easily clean.

1 Make sure that the surface of the concrete is cleaned thoroughly. Remove stubborn dirt or stains with a mixture of one part degreasing cleanser and two parts water. Rinse the concrete well and wait 48 hours before continuing.

2 Use a large paintbrush or a long-handled paint roller fitted with a fine-nap roll to coat the entire concrete surface in a thick layer of soy-based or other environmentally-safe chemical stripper. Allow the stripper to eat away at the sealant for 10 minutes, scrape up the peeling sealant with a paint scraper or putty knife. Clean up all of the debris.

3 Rinse concrete to remove all of the stripper. Let the concrete dry 48 hours. Apply the new sealant or the finish of your choice .

From MSDS:

SMALL SPILL: Soak up spilled material with paper towels and discard in trash.

LARGE SPILL: Liquid spills on floor or other impervious surfaces should be contained or diked, and should be absorbed with attapulgite, bentonite or other absorbent clays. Collect contaminated absorbent, place in plastic-lined metal drum and dispose of in accordance with instructions provided under Section 13. "DISPOSAL". Thoroughly scrub floor or other impervious surface with a strong industrial type detergent solution and rinse with water.For liquid spills that soak into the ground, contact the applicable Federal, State and or County Health Dept. for disposal recommendations. If disposal is required then refer to Section 13 "DISPOSAL" for instructions.
Leaking containers should be separated from non-leakers and either the container or its contents transferred to a drum or other non-leaking container and disposed of in accordance with instructions provided under Section 13 "Disposal". Any recovered spilled liquid should be similarly collected and disposed of.
Do not contaminate water, foodstuffs or feed by storage or disposal.

GENERAL PROCEDURES: Observe all protection and safety precautions when cleaning up spills -- see Section 8. "EXPOSURE CONTROLS/PERSONAL PROTECTION". For help with any spill, leak, fire or exposure involving this material, call day or night (800) 225-2883.

• Where starting is manual (there is a 'start' position on the control(s), a set of switch contacts on the control(s) provides power to the ignition module.
  
  • A problem of no spark with only one control indicates that the fault is with it or its wiring.
    
  • A problem with continuous sparking even with all the controls off or in their normal positions indicates a short - either due to a defective switch in one of the controls or contamination (e.g., spilled liquid) bypassing the switch contacts.
  
  
• Where starting is automatic, an electronic sensor, thermocouple, or bimetal switch provides power to the ignition module as needed.

Before you blame the ignition module for either lack of spark or continuous spark, make sure the wiring is in good condition and completely dry and clean ( or reasonably clean). Confirm that proper voltage is reaching the module with a multimeter or neon test lamp. The modules are quite robust:

• Any liquid that may have dripped into the module may result in temporary or permanent failure. Fortunately it may be possible to pop off the bottom cover (with power OFF or the module removed!) and clean it. The most likely failure would be the SCR if you are into component level repair. Else, just replace it.
• WARNING: There are several capacitors inside that may be charged to as much as 300 volts. The charge they can hold is probably not dangerous but may be painful or startling. Discharge these before touching anything inside or attempting to check components. Use a screwdriver blade or test clips and then confirm that they are discharged with a multimeter.
  
• Contamination of the controls from spilled liquid may result in continuous activation of the ignition module since any electrical leakage across the switch contacts will likely be enough to activate it. Remove the control panel cover and dry it out or unplug the range or oven for a couple of days. If the contamination is not just plain water, it is a good idea to clean it thoroughly to prevent future problems.
  
• Spills into the area of the electrodes at the gas burner assembly may short out the ignition for ALL the burners since they probably use the same module. Again, clean and dry it out or let it dry out on its own (if just water).

These are solutions for standard modules and replacements should be available from your local appliance repair shop or parts supplier. An exact mechanical match is not needed as long as the specifications are compatible.

Usually, this means that something has spilled into the front of the set and has contaminated the pushbuttons. If one of the channel pushbuttons has fluid in it, the set will just sit there searching for channels and will not respond to any other commands. The computer thinks you are pushing the channel button and responds accordingly. When you push another button the computer does nothing because it thinks that you are pressing 2 buttons at the same time. The board should be cleaned and any contaminated pushbuttons replaced by a qualified tech.

I would examine the pushbuttons at the front of the PC board to see if they have been contaminated with any kind of liquid that was sprayed or spilled inside. If they are contaminated then you can try cleaning them with lacquer thinner or replacing them and cleaning the board. If they are clean then this is a symptom of a defective main computer IC, and I have seen this on many of these sets. Unfortunately, this IC is surface mounted on a sub board and the board would have to be replaced and reprogrammed, and this would have to be done by someone with experience in these sets.