Drug Detection Products

Fire and gas detection systems are vital to ensuring safety and protection in oil and gas exploration environments. Safety solutions providers in the market today offer wide-ranging solutions to protect oil and gas exploration environments which include the personnel, the products and the plant. They offer services for fire and gas detection, fire suppression, emergency shutdown systems, security and access control.

Gas and fire detection systems and suppression in an oil and gas exploration/production environment is often a complicated task. Solution providers have to apply unique approaches that have been developed to curtail specific threats within the production environment. For instance in an offshore gas rig, safety threats can occur when the rig is struck by lightning. Lightning can often ignite the gas that is being emitted from the vent stack. Such a fire is prevented by infusing carbon dioxide to extinguish the flames. However in other situations, such as when a fire is triggered by roller bearings running dry, the fire suppression approach is entirely different. So, to offer effective solutions, safety solution providers must understand the nature of the trigger and the specific environment that is at risk. This would require an understanding of the basic construction of the environmentthe cabinet/enclosure/vent stack/deckand the equipment operating therein.

When offering fire and safety protection systems, specialist solution providers create solutions tailored to the unique needs within a customer environment, and bring onboard several expert project managers, technical consultants, maintenance managers and purchasing specialists. Further, these providers offer solutions that are compliant with British and European EN standards, and ensure that customer environments meet the appropriate standards on health, fire protection and safety as set out by various legislative requirements.

While scanning the market for specialist fire safety solutions, oil and gas companies would do well to look at solution providers who are able to offer:
Scalable solutions to support requirements in organisations of varied sizes and from varied environments.
Hardware procurement support from reputed and reliable manufacturers in the industry.
Diverse and extensive industrial experience combined with proven track records in project completion.
Skilled engineers with expertise in design, project management and execution.
Global consultation, design, manufacture and commissioning services.

Frequently Asked Questions

  1. QUESTION:
    What kind of drug test does the city of los angeles do? ?
    I'm applying for a job with the city of Los Angeles. I know they drug test city drivers, but do they test regular employees? And if so, what kind of test do they perform? Urine, hair? And thank you, but I don't need a lecture on the perils of drug use.

    • ANSWER:
      hi I think this help
      www.usmarijuanalaws.com
      Also The National Institute of Drug Abuse (NIDA) requires that
      companies test for five specific categories of drugs.Most drug testing
      companies will provide a test that checks for all five categories.These five categories include:

      Cocaine Includes Cocaine, Crack and Benzoylecognine
      Cannabinoids Includes Marijuana and Hash
      Amphetamines Includes Speed, Methamphetamines and amphetamines
      Opiates Includes Heroin, Opium, Codeine and Morphine
      Phencyclidine PCP
      Urine tests are among the least expensive and most popular type of drug test. The test generally tests for use within the past week or longer if the drug is regularly used. These tests are also temperature tested to ensure integrity of the sample.
      Hair tests are much more expensive than urine tests. These tests are often considered unobtrusive tests because they are just small hair samples. The hair drug test does allow a company to test for substances over a longer period of time, but do not usually detect use within the past week.These tests require a sample of hair that is about 1 inches long . These tests tend to test positive about twice as often as a urine test.
      Blood tests are the most expensive and most intrusive form of drug testing. They are also the most accurate method of testing and the least common because of the expense. Blood tests are not very popular due to the widespread fear of blood borne infectious diseases. Blood testing also has a short detection period.
      Saliva- these tests are typically a little more expensive than a urine test but are less than a blood or hair test. The saliva test is becoming more popular as they are a less intrusive form of drug testing and are easiest to administer. These tests are able to detect more recent use than other drug testing procedures and are able to detect use within the past few days.These tests are very product specific because there are no nationally accepted standards or cutoff concentrations for detection. The test does require lab processing to ensure that the test is accurate. These tests are also the hardest to manipulate by the drug user. The tests tend to mimic the results that would be found in a blood test because saliva is derived from blood. Detection is available immediately upon use.

  2. QUESTION:
    What kind of drug test does walmart use? And is three weeks long enough?
    I quite smoking on May 28th n have a drug test on June 14th. is this enough time to pass my marijuana piss test?

    Plz dnt critisize me (dnt need it)

    • ANSWER:
      Marijuana Detection Times

      Frequent users blood drug test (defined as someone who smokes several times per week)
      THC: 4-8 hours after smoking
      THC by-product: 2 or more weeks after smoking

      Frequent users urine drug test
      THC by-product: 2 weeks to a month after smoking (3 months for extremely heavy users)

      Infrequent users blood drug test
      THC: 3-4 hours after smoking
      THC by-product: 2-3 days after smoking

      Infrequent users urine drug test
      THC by-product: up to 10 days after smoking

      They do drug tests to check for THC in your system from smoking. If you didn't smoke often, two weeks should be long enough. I don't judge you for smoking BUT I hear they lock walmart employees in after hours so watch out man! Know you rights!

  3. QUESTION:
    What is the most common type of random drug test?
    When employers randomly drug test - what is the most common method?

    Saliva?
    Urine?
    Hair?

    Thanks!

    • ANSWER:
      Most companies drug test because the tests are sanctioned by the state, while other states do not have many regulations. So ...depending on who is performing the test, the cost of the test, the expectations and federal requirements. Some businesses may also have their own personal drug testing rules as well.
      Usually
      Urine: the least expensive and most popular type of drug test.
      The test generally tests for use within the past week or longer if the drug is regularly used. These tests are also temperature tested to ensure integrity of the sample.You can buy a home urine testing kit for around to .
      Hair : much more expensive than urine tests.These tests are often considered unobtrusive tests because they are just small hair samples. The hair drug test does allow a company to test for substances over a longer period of time, but do not usually detect use within the past week.Lab test for 90 days back (1 inches sample of hair) 0- 180
      Saliva :These tests are typically a little more expensive than a urine test but are less than a blood or hair test. The saliva test is becoming more popular as they are a less intrusive form of drug testing and are easiest to administer. These tests are able to detect more recent use than other drug testing procedures and are able to detect use within the past few days.These tests are very product specific because there are no nationally accepted standards or cutoff concentrations for detection. The test does require lab processing to ensure that the test is accurate. The tests tend to mimic the results that would be
      found in a blood test because saliva is derived from blood. Detection is available immediately upon use.
      Blood : the most expensive and most intrusive form of drug testing. They are also the most accurate method of testing and the least common because of the expense. Blood tests are not very popular and also has a short detection period and requires trained phlebotomists to take to the blood from the individual.

  4. QUESTION:
    How is a drug test on hair performed? What are the methods used?
    Is there a specific type of machinery involved, what is the process for which it is analyzed, etc. Basic facts on how conclusions are made. For a school project.

    • ANSWER:
      Hair testing: Hair analysis:

      Hair analysis to detect drugs of abuse have been used by UK and Canadian courts,
      and hair testing for alcohol markers is now recognised in both the UK and US judicial
      systems. There are guidelines for hair testing that have been published by the Society
      of Hair Testing that specify the markers to be tested for and the cut off concentrations
      that need to be tested. There are only a few UKAS ISO17025 accredited laboratories
      in the UK including Tricho Tech based in Cardiff and Alpha Biolaboratories based in
      Warrington, UK. Drugs of abuse that can be detected include Cannabis, Cocaine,
      Amphetamines and drugs new to the UK such as Mephedrone.
      The hair follicle test is growing in popularity because it is less invasive than a urine
      screen, it is harder to falsify or tamper with the specimen, and the detection window
      is extended to roughly three months. Hair for testing can be collected from anywhere
      on the body, so the test can be utilized even when someone is bald or shaves their
      head. Because body hair grows at a different rate than head hair, some people who
      have made the correlation that drug use can be detected in body hair for up to 12
      months.

      Which Drugs Can Be Tested:
      Cocaine, marijuana, opiates, methamphetamine and phencyclidine, or PCP, can
      be detected through a hair drug test. Nicotine, methadone, simple benzodiazepines,
      some antidepressants and mescaline have been detected in hair, too, but these
      tests are still in the process of research and development. To rule out the possibility
      of external contamination, such as by marijuana smoke, testing labs look for both
      drug and its metabolites, or by-products, produced by the body.
      According to Omega Laboratories, a standard hair test requires 60 or more milligrams
      of hair, cut as close to the scalp as possible, or approximately 90 to 120 strands,
      depending on the hair thickness. Each half-inch of head hair provides a 30-day history
      of drug use. The standard is to test 1.5 inches of hair, or a period of approximately
      90 days. If there is not enough head hair, body hair can also be used, but due to the
      slower growth, the time-frame represented is approximately one year.

      Laboratory Analysis:
      After consuming drugs, the body processes them into drug metabolites, which
      the bloodstream carries to the hair. They enter the hair follicle and move into the
      hair strand where they remain embedded inside the hair shaft. Specialized
      laboratories extract the drug metabolites from the hair sample and purify and
      concentrate them. They test them by various chromatography methods -- laboratory
      techniques that separate and analyze specific components in a mixture, and also
      by antibodies that can recognize specific drug molecules.

      Confirmation:
      Antibodies that test for the drugs can sometimes mistake prescription medications
      for drugs, and thus cause a false positive screening result. To eliminate that
      possibility, laboratories have to confirm all positive results for methamphetamine,
      opiates, PCP, cocaine and marijuana. The method used is gas chromatography-mass spectrometry, or GC-MS, which combines two standard chemical techniques to
      identify different substances within a test sample.

      Advantages and Disadvantages:
      When compared to the standard urine testing, hair drug tests can detect a
      longer period of drug use. Many drugs, with the exception of marijuana, are
      rapidly excreted from the body, making them undetectable in urine if the test
      is done more than two to three days after use. Since the drug metabolites
      reside inside the hair shaft, bleaches, shampoos and other chemicals cannot
      alter the sample. Additional advantages include non-invasive collection procedures
      and easy sample storage. The limitations of hair drug testing are hair length, high
      cost and the inability to detect very recent drug use.

  5. QUESTION:
    What can Drug Dogs detect?
    I have a lot of questions. First of all are they accurate. I had a friend in class today that had weed in his back pack. A drug dog came into our class and he didn't even find it. How is that possible. I even saw the stuff. What can drug dogs smell and not smell. Can they smell tobacco products because my friend has some cigs in his car also. I know two kids got busted today. How can you fool them or something. Isn't their something that can mess up a dogs nose. my friend told me he had something like that but i dont know. When i am driving home i sometimes see my friends smokin pot in their car. Do they trick the dogs or is it just luck. Also can they find lean or sizzurp. Thanks

    • ANSWER:
      A good detection dog can find anything including drugs, tobacco, bombs, dead bodies etc. that it is trained for. Dogs are extremely accurate. Some dogs can even detect changes in a person's body chemist so they can predict seizures.

      When you see your friends smoking in their cars all that means is that didn't have the drugs on them when they were near the dog.

  6. QUESTION:
    How many quarts of water do i drink a day to get drugs out of my system?
    ive smoke pot the past couple days and i need to get it out of my system before december 17th. i need to know how many QT's do i need to drink a day.

    • ANSWER:
      How long does Marijuana stay in your system?

      Detoxifying Products for removing THC out of your System
      Purchase Drug Detection Kits Here

      Marijuana ( pot, herb, weed, grass ) is the most commonly used and tested for drug in the United States and several other countries as well. Marijuana s effects on the user and detection time depend on it s strength or potency, which is related to the amount of THC(Tetrahydrocannabinol) it contains.

      When you ask the question How long does marijuana stay in your system? you need to take into account the fact that there is no simple answer to this question. THC (Tetrahydrocannabinol) can stay in a person's body for as long as 3 to 90 days after smoking or being ingested orally. There are numerous determining factors for how long drug toxins stay in a persons body which vary from person to person, such as the analytical method used, your health, your body weight, metabolism, fluid intake, the type of drug toxin, and the degree of exposure to the drug toxin.

      The speed at which marijuana leaves your body depends both on the speed of your metabolism, as well as on the half life of THC. It s estimated that THC can have a half life that ranges anywhere from 1-10 days. It s almost impossible to find out what that half life is, which means that it is very difficult to use it to calculate how long it will take for all of the THC to leave your body.

      For this reason, when you ask How long does marijuana stay in your system? you have to realize that it s very unlikely that you ll be able to get a usable answer. The most common period of time is anywhere from 3-30 days, depending on your metabolism and the amount of marijuana that you ve smoked. This is unfortunate, since it means that while most drug tests can only turn up evidence of other drugs if you ve been taking the drug within a few days of the drug test, marijuana could still be detected in a urine test up to a month after the last time it is used. If you smoke it occasionally it will remain in your system for up to 10 days. If you smoke marijuana on a regular basis it will stay in your system for as long as 45 days, and if you smoke marijuana at a constant pace, it can stay in the body for 90 days, Marijuana is fat soluble. It stores in the fat cells of the body, the brain, the liver, the kidneys, in other words the major organs.

      Hair tests are even worse, since your body stores THC in the hair follicles. For this reason, the previous answers to How long does marijuana stay in your system? are only useful if you re going to be forced to take a urine test. For the hair test, depending on the amount of hair that the company takes, it s possible that marijuana could be detected up to three years after the last time that you smoke.

      If you re worried about testing positive for marijuana, then you should definitely invest in some of the great Detoxifying Products for removing THC out of your system that will help you to test negative for marijuana use. This is due to the fact that it takes so long for the THC to leave your system that you ll probably test positive if you do not. If you don t have an entire month to wait before you need to take the test, then you should definitely think about some other options to keep from testing positive. If you re not sure how to tell whether or not the marijuana detox is working, then there are several things that you can do. First of all, you can also purchase a small drug testing kit. Purchase Drug Detection Kits Here This drug testing kit will allow you to test and make sure that you re no-longer testing positive for marijuana. Just detoxify, and then use the drug test kit to check your urine. After using the drink, it should come up negative.

      Find the most suitable product:

      Select your sex :
      MaleFemale
      Level of Toxins:
      Low (once a week or less)Moderate (1-2 times a week)High (3-5 times a week)Extreme (daily)
      Date of test:
      1-3 days3-7 days7-14 days14+ daysMonthly/RegularAny time
      Body type:
      lean (low body fat)regular (average body fat)large (high body fat)
      Weight:
      less than 200 lbsover than 200 lbs
      Application/Treatment:
      Urine drug testSaliva drug testHair drug testBlood drug testNail drug test
      Toxins/Substances:

  7. QUESTION:
    UA, Urine Test, Drug Test, Marijuana, possible to pass?
    110 lbs
    Female
    Not extremely active, but not sedentary
    eats about 900 - 2,000 calories a day (healthy & unhealthy food)
    drink about 3 cups of water a day

    did not smoke avidly, whatsoever, up until two months ago. Smoked maybe 1-2 bowls a day, skipped a day, and lets say shared a joint, then shared a blunt, skipped a day, and so on for about 2 months.

    quit on August 15, 2013
    clean for about 13 days, wont need to drop my drug test for, lets say, 4 more days.
    is it possible that I may be clean.

    Also I will be drinking a detox a few hours prior that's suppose to keep you clean for a certain time frame. (the name of the detox evades me, yet it is already purchased and stored in another location)

    • ANSWER:
      We will address a urine drug test as you did not specify a test in your question. The THC will be detectable in your urine for different periods of time depends on your usage levels, duration and many personal factors. If you are a casual user ( 1- 3 times per week) plan on a 14 day detection time. If you are a heavy user ( 3 + times per week for more than three months) plan on up to 11 weeks. As a one time user one can expect a drug detection time of about 3 - 4 days.

      You are definitely art risk at his point and should use the detox product according to the instructions given with the product. Also, be care full of attempting to use any of the urban legends and myths running around on how to beat a urine drug test. There are a bunch of urban legends and myths about passing a drug test that have been running around for many years and just will not die. The testers know all the tricks and the tests and testing procedures have been adjusted to compensate. They might have worked at one time, but few work now. Good luck.

  8. QUESTION:
    clean hair drug test?
    Is there any way to get a clean hair test if I've smoked marijuana in the past? Doesn't traces of drugs stay in the hair for years?
    Not planning on getting drug tested, just curious.

    • ANSWER:
      Yes, good clean up product..
      General hair test is expensive type of testing, 0-250 (for a good job, court case ,etc..) Drug detection time for hair test is up to 90 days and it takes about a 0.5 inch of hair for every 1 month of usage. Usually they only go back 3 month (require a sample of hair that is about 1.5inches) but it's not uncommon to test up to 8 months ago.
      How it's work "Every time you introduce a toxins to your body, the blood carries it around in your veins depositing little bits of the toxins here and there throughout your body. In hair toxins are deposited into the hair follicle and trapped permanently or until you cut your hair. "

  9. QUESTION:
    Drug Tests ? Help me ASAP Please "/?
    I smoke marijuana , but I havent smoked in 3 weeks . Recently my mom and I ended up in a big fight and she ended up raiding my room finding a note from my friend talking about smoking . I assured her that im not smoking , we were just kidding around . But she wants to give me a random drug test , im afraid that its going to be soon ! Like I said before , I havent smoked in 3 weeks . Would I pass the drug test if i took it now ? If not how long would it take to get out of my system ? What could I do to speed up the process . Please help me asap :(

    • ANSWER:
      usually the marijuana detection times;

      Frequent users blood drug test (defined as someone who smokes several times per week)
      THC: 4-8 hours after smoking
      THC by-product: 2 or more weeks after smoking

      Frequent users urine drug test
      THC by-product: 2 weeks to a month after smoking (3 months for extremely heavy users)

      Infrequent users blood drug test
      THC: 3-4 hours after smoking
      THC by-product: 2-3 days after smoking

      Infrequent users urine drug test
      THC by-product: up to 10 days after smoking

      * THC by-product = 9-carboxy-THC which is the by-product of your body metabolizing the THC in your fat

      and just so you know, if your mom knows a bit about this and doesn't care about money, i'd shave my hair off!
      every type of drug ever consumed while the hair was growing is detectable.
      it is by far the most accurate drug test..

  10. QUESTION:
    what substance thy looking for a urine drug test?
    hi, i just got a job and i was been scheduled to perform drug test after. i am having cough and flu during the test, and i was taking cough syrup for my sickness that time(Tussing cough DM expectorant) i just want to know what substabce of drugs thy been looking for?

    • ANSWER:
      Temporary Detoxification Drinks And Pills Will Not Work For A Random Urine Drug Test

      --------------------------------------------------------------------------------

      A Random Employment Urine Drug Test can pose a significant problem when it comes to using a temporary or permanent type of detoxification product. This is simply because you just will never know when the test will be given to you.

      What about using one of the temporary drinks or pills that can get your urine clean in 1 hour for a 5-6 hour time frame?

      You will see many of these products sold everywhere on the internet and in health food stores like GNC. We even have them available on our site.

      Besides the fact that many of these temporary products sold elsewhere are low grade quality, a temporary detoxification product requires that you follow two specific directions in order for them to work properly:

      You can not use any substance you are looking to be clean of within 48 hours of your test. Obviously, when being faced with random drug testing, you do not have the luxury of a 48 hour notice before your test.

      Secondly, temporary systems also require that you keep an empty stomach anywhere from 8-12 hours before taking them. This is due to the fact that food in your stomach can block the flushing action of the system. Again, with random testing, you do not have the luxury of 8-12 hours notice without eating.

      So What Are Your Options?

      The first would be an additive that you drop into your urine sample. These are sold all over the internet (Urine Luck and Tinkle Sprinkle are the most advertised brands of urine additives). However... labs easily detect these now, no matter what the product manufacturer claims. Not only will you fail, but the lab will know you tried to cheat the test. With that said, never use a urine additive!

      The second and only viable option for random urine testing is urine substitution (using someone else's clean urine). The urine must be from someone who is clean, it must be heated so it passes the labs initial temperature check, and you must be able to easily conceal the urine and administer it into the sample cup.

      The Clean Machine Urine Substitution System

      With that said, we have developed a concealable urine substitution kit that can administer heated drug free urine for a random urine drug test. Our product is completely undetectable, even in observed drug testing situations.

      Synthetic liquid or real human urine in dehydrated form

      Individually tested and certified drug-free

      Vacuum sealed for extended 1 year shelf life
      Heating element maintains proper temperature
      Adjustable belt for observed testing situations
      Enough for 2 tests
      Easy to use, 1 year shelf life at room temperature
      The system comes in a synthetic or actual human form (dehydrated and freeze dried).

      What's The Difference Between The Dehydrated and The Synthetic?

      As far as results go, both are drug free urine samples that will test negative for any drug, as well as pass any adulteration testing. However, some people just like to know that they're working with real human urine and prefer the dehydrated human urine kit.

      Some of our customers have heard that synthetic can be detected as fake. We have not had any problems with the synthetic, and if detection did ever occur, it would be pulled from the site immediately. Our synthetic has undergone multiple testing phases, and is retested at a lab on a bi-monthly basis.

      But we offer the dehydrated human urine as well, in the case you would feel safer and more comfortable with this over the synthetic.

      The dehydrated system requires that you add the dehydrated urine into the distilled water (included) in the I.V. bag. Both systems are completely portable and can be stored anywhere, no freezing required.

      Please click the product button below to view product descriptions and online ordering. You may also call toll free 1-888-516-6120 to order via telephone.

  11. QUESTION:
    Will I pass my drug test?
    Drug test Monday : I have not smoked marijuana in 3 weeks. The last time I did smoke it was about 4 times in one night and before that was a week. I currently weigh 155 pounds and am 6 feet tall. I do exercise about 2-3 times a week about an hour each time. This is a urine test to see if I have THC in my system will I pass? Please give an explanation.

    • ANSWER:
      Marijuana Detection Times
      Frequent users blood drug test (defined as someone who smokes several times per week)
      THC: 4-8 hours after smoking
      THC by-product: 2 or more weeks after smoking

      Frequent users urine drug test
      THC by-product: 2 weeks to a month after smoking (3 months for extremely heavy users)

      Infrequent users blood drug test
      THC: 3-4 hours after smoking
      THC by-product: 2-3 days after smoking

      Infrequent users urine drug test
      THC by-product: up to 10 days after smoking

      Read more: http://wiki.answers.com/Q/How_long_does_marijuana_stay_in_your_system#ixzz1OLZAcfOx

  12. QUESTION:
    Any one ever buy and use a detox drink or product from GNC and passed a urine drug test?

    the drug in question is amphenamine. I dont need cocky remarks. If you never have, you dont need to answer.

    • ANSWER:
      Drug Testing And Other Possible Conditions Of Employment
      _

      While some may consider drug testing, credit checks, reference checks, and other pre-employment checks to be Gestapo tactics, they are a requirement for many companies. And, yes, in most cases they are legal. Remember that little section of legalese at the end of the employment application you didn t really read? Your signature on that document is what gives them the right. So be ready to live up to the terms to which you have already agreed. By the way, if you look closely at your acceptance letter, you may notice that the offer is contingent on you passing whatever pre-employment checks and/or tests they may have. Even if it isn t in the letter, it was probably contained within the application you signed earlier. Most employers consider these tests to be conditions of employment, and these conditions can be in effect even after you have started with the company.

      An example of this condition of employment clause being invoked occurred when a recently hired grad was found to have lied about some information on the employment application. There have been numerous cases of graduates who have been hired and then fired by the new employer based solely on the conditions of that document. As long as you have been straight and honest, this should not be a problem for you.

      On the other hand, the pre-employment check that many college students fear most is the pre-employment drug screening and rightly so. A strong note of caution: if you have in the past or are presently using illegal drugs, you are strongly advised to stop using them immediately! The day before or even the week before the test will likely be too late to achieve clean results. But if you make a commitment to steer clear far enough in advance, you may give your body enough time to detoxify and flush out. While many substances can clear in under a week, there are some that will stay with you much longer. I recently spoke with a graduate who had accepted employment, only to fail the drug test. Reason? He had used marijuana thirty-one days before the drug test and failed.

      There is no simple answer as to how long drugs will remain in your system, since the answer is influenced by the specific drug half-life, intensity of the usage, method of usage, length of usage, tolerance, fluid intake, body size, body fat, metabolism, andthe specific range which the drug testing lab uses to signify a positive for drug use. But the following table provides some general guidelines for the amount of time a drug can be detected by most standard drug tests:
      Drug Detection Time
      Alcohol 6 24 hours
      Amphetamines 2 3 days
      Barbituates 1 day to 3 weeks
      Benzodiazepines 3 7 days
      Cocaine 2 5 days
      Codeine 3 5 days
      Euphorics (MDMA, Ecstasy) 1 3 days
      LSD 1-4 days
      Marijuana (THC) 7 30 days
      Methadone 3 5 days
      Methaqualone 14 days
      Opiates 1-4 days
      Phencyclidine (PCP) 2 4 days
      Steroids (anabolic) 14 30 days

      Keep in mind that detection time listed above does not mean that the drug is fully expelled from your body within that amount of time just that it has dissipated enough that it can no longer be accurately detected or at least is not high enough to register a positive on a drug test. Most drugs are treated by the body as toxins which take time to eliminate. Rather than allow excess toxins to potentially affect vital organs, they are often stored in fat cells, making them typically difficult to release or detoxify from the body.

      The basic drug test used by most corporate drug testing programs is called a Five-Screen (or NIDA-5 or SAMHSA-5 ) which is testing for five types of drugs:

      1. Cannabinoids (Marijuana, Hashish)
      2. Cocaine (Cocaine, Crack, Benzoylecognine)
      3. Opiates (Heroin, Opium, Codeine, Morphine)
      4. Amphetamines (Amphetamines, Methamphetamines, Speed)
      5. Phencyclidine (PCP, Angel Dust)

      However, many drug testing firms now offer a Ten-Screen which expands to include five additional drugs:

      1. Barbituates (Phenobarbital, Secobarbitol, Pentobarbital, Butalbital, Amobarbital)
      2. Methaqualone (Qualuudes)
      3. Benzodiazepines (Tranquilizers-Diazepam, Valium, Librium, Ativan, Xanax, Clonopin, Serax, Halcion, Rohypnol)
      4. Methadone
      5. Propoxyphene (Darvon compounds)

      One major drug testing company is now offering the Ten-Screen for the same price as the Five-Screen. Result? Many employers end up testing for more, rather than less. Here is a list of other drugs that can be included in drug tests.

      1. Ethanol (yes, that s alcohol)
      2. LSD
      3. Hallucinogens (Psilocybin, Mescaline, MDMA, MDA, MDE)
      4. Inhalents (Toluene, Xylene, Benzene)

      If there is a drug out there, there is a drug test for it.

      How about one more thing to worry about? Second-hand smoke from marijuana and crack cocaine can be absorbed into your hair. Problem? Some companies are now using hair testing to determine drug usage. Answer? Don t even hang around others who are doing drugs. It can still be absorbed into your system and produce a positive test result. I didn t inhale . . . is not a valid response. And sufficient second-hand smoke exposure can also cause failure of standard urine drug tests. You could fail both a primary and secondary test, with no recourse other than saying that it was someone else. It s just not worth the risk.

      So if you have been exposed to illegal drugs, your best insurance for a clean drug test is to stop using them immediately. And not just temporarily permanently. Drug test or no drug test, using illegal drugs (and excesses of alcohol) will eventually catch up with you sooner (if you are foolish enough to use them during work hours) or later (if you obliterate the rest of your life outside work).

      Please note: this is not a lecture from Mom and Dad on the evils of drugs. This is a straightforward and honest warning from someone who has seen the negative effects that drugs can have in the workplace. Drugs have no place in work society today and never will.

      If you are not a drug user and you fail the drug screening (it does happen), be as straightforward with the employer as possible, let them know that you are not a drug user and ask them if they would please do a confirmation test. Recent estimates from the Journal of Analytic Toxicology showed error rates of 5 to 14 percent on this initial test. The following is a list of over-the-counter medications which have been known to cause false positives in drug testing:

      * Ibuprofen (Advil, Motrin)
      * Midol
      * Nuprin
      * Sudafed
      * Vicks Nasal Spray
      * Neosynephren
      * Ephedra and Ephedrine-based products (often used in diet products)
      * Detromethorphan
      * Vicks 44

      There are more, but suffice to say that not every drug test is accurate. That s why almost all drug testing companies ask you in advance what medications you are presently taking or have taken in the last thirty days. Make sure you list them all, even over-the-counter medications. Some drug testing companies will either have a doctor (or other medical professional) personally interview those who fail a drug test to determine if there was a potential false positive.

      If you do receive a failing grade (actually referred to as a positive on your drug test this is one test you do NOT want a positive you want all negatives) on your drug test, ask to be retested with a confirmation or secondary test. Many employers do not automatically perform the confirmation test since it is significantly more expensive than the initial test. However, if they are unwilling to offer retesting due to the expense, offer to pay the expense on your own and then use a different testing service ideally a secondary testing provider recommended by the employer so that you won t have a credibility problem with the second test. If you are turned down in your request or you have additional problems, you may want to seek the advice of a competent attorney for further counsel on your available options

      http://www.collegegrad.com/book/New-Job-Preparation/Drug-Testing-And-Other-Possible-Conditions-Of-Employment/

  13. QUESTION:
    How to pass a drug test for marijuana?
    I have been smoking for awhile and smoke at least a joint or a couple bowls a night. I could have this drug test anytime this week. What can i do?

    • ANSWER:
      Hair drug test- 90 days or good hair clean up product.
      Swab drug test- i think detection time for pot its 3-5 days
      Urine drug test- clean urine or good product which fools the drug test. You can go to this site and call the people from here they have a phone consultations and will answer your questions for free. I used these guys for a hair drug test and I passed. The website its www.hairtestfriend.com (check the links for urine or saliva) and there number its 2524894754

  14. QUESTION:
    Will I pass my drug test?
    smoked out a bowl twice and took to hits from a joint a month ago, first time i have ever smoked. im 5'9" and 130 pounds. i work out pretty actively. will i pass? its a pre employment urine test from labcorp

    • ANSWER:
      Marijuana Detection Times
      Frequent users blood drug test (defined as someone who smokes several times per week)
      THC: 4-8 hours after smoking
      THC by-product: 2 or more weeks after smoking

      Frequent users urine drug test
      THC by-product: 2 weeks to a month after smoking (3 months for extremely heavy users)

      Infrequent users blood drug test
      THC: 3-4 hours after smoking
      THC by-product: 2-3 days after smoking

      Infrequent users urine drug test
      THC by-product: up to 10 days after smoking

  15. QUESTION:
    Will I Pass A Drug Test For Weed For A Job?
    Will I Pass A Drug Test For Marijuana For A Job Interview? Its Been 29 Days Today Since I Last Smoked And I Wanna Know If Ill Pass A Drug Test For A Job...Im 5'8 158lbs Heavy Smoker About A .7 (Gram) A Day. I Dont Really Exercise And I Drink Alot Of Water No Soda Probably 1 Every 2 Weeks So Yea I Drink Alot Of Water. Im Not Taking The Test Today But Maybe By The End Of The Week Or Starting Next Week. Any Answers Will Be Helpful Or If You Know Anything To Help Get It Out Faster Let Me Know Thanks.

    • ANSWER:
      Marijuana Detection Times:

      Frequent users blood drug test (defined as someone who smokes several times per week)
      THC: 4-8 hours after smoking.
      THC by-product: 2 or more weeks after smoking.

      Frequent users urine drug test
      THC by-product: 2 weeks to a month after smoking (3 months for extremely heavy users)

      Infrequent users blood drug test
      THC: 3-4 hours after smoking
      THC by-product: 2-3 days after smoking.

      Infrequent users urine drug test
      THC by-product: up to 10 days after smoking.

      MARIJUANA DETECTION TIME CHART

      Marijuana Detection Time Chart

      Urine Drug Test

      1 time only

      5-8 days

      2-4 times per month

      11-18 days

      2-4 times week

      23-35 days

      5-6 times per week

      33-48 days

      Daily Usage

      49-90 days

      ** Hair Drug Test

      Up to 90 days, some States 120 days

      ** Saliva Drug Test

      1-10 days

      ** Blood Drug Test

      2 days

      ** Fingernail Drug Test

      90 Days

      ** Alcohol Drug Test

      3-5 days via Ethyl Gluconoride (EGT) or 10-12 hours via traditional method

  16. QUESTION:
    How to pass a drug urine test?

    • ANSWER:
      Depends on level of testing, type of drug, amount of usage, etc...
      -For drugs with short detection time (check online for urine test) abstinence.
      -"Urine substitution method" better look for clean friend because many synthetic urine brands are detectable. Main factors for success are clean urine, proper temperature and no human supervision.
      -Same day "Detox'' drinks, they don't detox really, they are made to mask the drug metabolites for 45-60 minutes to 4-5 hours after you drinking it. You can order online (and generally search for detoxes), buy from most head shops (some products are out of date) or places like GNC ( they keep in general products with good quality ). Other option is companies like drugtestfriend that provide phone counselor to work with you and walk you through the process. Factors for success with detox drinks are many .. proper drink for your body type, amount of use and drug, body hydration, period of abstinence, etc..

  17. QUESTION:
    Hi I have a hair drug test coming up for a job. I haven't smoked since oct 2010. Will I be ok?
    I work in medical field and am worrie they will test for a year or more. Please no judging I don't smoke anymore thanks!!!

    • ANSWER:
      Yes, you will pass a hair drug test. You don't need to cut your hair; they will only test an inch and a half of your hair anyway.

      There is truth in theory that they can go back on drug detection for as long as hair length but in practice they follow scientific procedures, and keep the same method for all samples. It's that pesky scientific uniformity that is required in scientific testing. If they just changed the rules on each sample then it's really not scientific anymore.

      Below is information I already posted to another question on hair drug tests. It should give you more information on how the tests are done.

      XXXXXXXXX

      I have not heard any reliable ways to beat the hair test.

      There are a lot of chemicals and shampoos on line that purport to beat the test but their results are spotty at best; and probably more due to the fact that hair follicle tests are not good at detecting low dose or infrequent use than anything their hair product did that caused a false/negative result.

      Its true that in research studies that they can go back several years on drug usage; but keep in mind, they can only go back as far as the length of hair you give them. So if you don't have several feet of hair growth they would not be able to go back several years.

      It's also important to note that anything beyond 90 days gives them too many false/negatives and false/positive results. Therefore they are not certified to go beyond 90 days. So if you haven't done drugs within about 90 days you will pass.

      How they get the 90 days figure is by getting a sample of your hair; at the lab they measure precisely one and a half inches from the end that was closest to the scalp, they snip off and throw the remainder of your hair out. They test the inch and a half section only.

      Why they get 90 days out of it is because human hair on head grows a half inch per month, plus or minus a few tenths of an inch.

      You need to have an inch and a half hair on your head at the time of the test. If you don't they will either just test the length you have (that rarely happens) or they will refuse to test it (again that rarely happens) or if permitted will take it from body hair. If you shaved body hair or refuse to provide body hair (and if they are permitted to take it, some employers refuse in contract to get that invasive) then you fail.

      So it is not wise to go in with less than one and a half inches on head.

      It is also foolish to shave your head under any circumstances ( unless of course you just like the shaved head look) because if you think about it, shaving your head accomplishes nothing. People are shaving their heads and then letting it grow out three months before the test but really just cutting it slightly is really all you need to do if you did drugs right around that 3 or 4 month zone and just want to be extra safe.

      Keep in mind too that it takes up to 5 to 10 days from the time you did drugs to the time that hair breaks through the scalp. So to be safe if drugs were done in that 3 to 5 month range; it's a good idea to snip that hair down a bit. Better to leave yourself plenty of buffer zone just in case your hair grows really slow.

      Also, again if you did drugs in the past three months infrequently or it was a low dose; hair follicle tests are not good at picking that up; so you might pass. In fact you would have a better chance of passing if you snorted a gram of cocaine in one night than if you would have spread that gram out over a weeks time.

      If the job or whatever is important to you, I wouldn't risk doing anything 3 to 5 months prior to test because low dose and infrequent use SOMETIMES comes back positive. So I wouldn't take the chance, but you might be more of a betting type.

  18. QUESTION:
    whats the best way to get clean for a drug test?
    i have a drug test on the 23. i smoked from april 27- may 3
    about a oz

    • ANSWER:
      Marijuana Detection Times
      Frequent users blood drug test (defined as someone who smokes several times per week)
      THC: 4-8 hours after smoking
      THC by-product: 2 or more weeks after smoking

      Frequent users urine drug test
      THC by-product: 2 weeks to a month after smoking (3 months for extremely heavy users)

      Infrequent users blood drug test
      THC: 3-4 hours after smoking
      THC by-product: 2-3 days after smoking

      Infrequent users urine drug test
      THC by-product: up to 10 days after smoking

  19. QUESTION:
    Passing drug tests ?! And places that test?
    Hi all !
    No , im not a loser that doesn't go to school or work or has no responsibilites : P
    Anyway .
    -If you smoke for 2 years , can thc be out of your system if you quit for 4 months?
    -If you're clean and you smoke for 2 months, and then quit for good , would 1 month be enough time t be clean? (Smoking , .5 every other day sometimes twice a day) ?
    -How long would it take me to get thc out of my hair ?
    -How does hair testing work ? I know they can test up to 90 days or 120 days, and cutting your hair doesn't help - does that mean thc never comes out of your hair ?
    -If you took 2ci one time in your life (the lowest dose you could get)(and never want to do it again mind you that was terrible . Let someone talk me into it. Bad excuse , i know .) - can it show up in your hair ? The 2ci I took once was 3 years ago , would it still be in my system ?
    -Do volunteer places usually use urine tests , do they ever use hair tests ?
    -What places usually do hair tests instead of urine tests ?
    The longest I smoked weed for was 2 years . I'm 5'1 and a half , 96 lbs, always been sknny , and im 21 .
    Then I smoked again for 2 months for some odd reason , and now ive quit for good, which was on July 24 . I may have a screening for volunteering for my Bachelor's degree in September .
    I want to know , if I smoked for 2 years , stopped for 4 months , smoked for 2 months after stopping for 4 months and then quiting for good , will I be clean by september if I quit on july 24th ?
    If not, would I be clean by 2015 ?

    Thanks .
    Yeah , don't be stupid . Now that I'm in the process of getting my BA, I really wish I had never touched either thing !

    • ANSWER:
      Any drug, including THC, will be detectable in your hair as long as the hair that was growing at the time of your use is still on your body. The test typically uses only the 1 1/2 inches of hair closest to your scalp which restricts your detection time to about three months. You will need a detox product to pass a hair drug test if you have used in the last three months. The THC will be detectable in your urine for different periods of time depends on your usage levels. If you are a casual user ( 1- 3 times per week) plan on a 14 day detection time. If you are a heavy user ( 3 + times per week for more than three months) plan on up to 11 weeks. 2ci is usually not tested for in most simple drug tests, but can be if they really spend some money on the expensive tests.

  20. QUESTION:
    Do wal mart carry drug detox products or any products that will help pass a salvia test?

    • ANSWER:
      The Oral Fluid Drug Test detection time
      Cocaine (COC) up to 24 hours
      Amphetamine (AMP) up to 72 hours
      Methamphetamine (mAMP) up to 72 hours
      Opiates (OPI) 24-48 hours
      Marijuana (THC) up to 14 hours

  21. QUESTION:
    Drug test hair follicle?
    I recently smoked cigars and dipped the end in some alcohol for better taste. This is barely any alcohol at all it's like 2 finger dips. My school is drug testing for alcohol with hair follicle testing will the alcohol be in my system even with the little alcohol I consumed? Will I test positive? P.s. I have never drinker before or after this

    • ANSWER:
      Any drug will be detectable in your hair as long as the hair that was growing at the time of your use is still on your body. The test typically uses only the 1 1/2 inches of hair closest to your scalp which restricts your detection time to about three months. You will need a detox product to pass a hair drug test if you have used in the last three months. The common hair drug tests do not look for alcohol. You should be OK.

  22. QUESTION:
    What does a parole officer drug test for?

    • ANSWER:
      There is NO such thing as a drug test being able to test for everything. Nor can a drug test possibly test for all illegal drugs; it CANNOT be done. It would NOT matter if its a blood test or urine test or hair test; it cannot be done.

      Most probation departments DO NOT test for LSD or mushrooms for instance. And many are still not testing for bath salts, k2 or other synthetic types of new drugs yet.

      It's not as if they put your sample in a box and a computer just spits out every drug in your system. It doesn't work that way.

      Your standard 5 panel drug test will test for 5 drug classifications:

      amphetamines
      cocaine
      marijuana (THC)
      opiates
      PCP

      some labs are up to 19 panels now but that gets expensive. Most labs allow the agency paying for the drug test to choose combinations (kind of like cable T.V. whereby you can get different packages for a discount instead of paying individually for each channel or like Subway sandwich shops with their combo meals. It's the same principle. )

      So the agency can pick and choose which additional drugs they want you tested for and at 11 panel they are choosing 6 more drugs.

      Probation departments will sometimes pick alcohol and or nicotine for minors because both are commonly abused drugs that are illegal for them to consume.

      And it's actually not the alcohol they are testing for but rather the metabolites your body produces when you consume alcohol. It's known as the EtG test and it can detect those metabolites in urine up to 80 hours from your last alcoholic drink.

      If they give you a hair drug test those metabolites can be found up to 90 days.

      The above is maximum detection times. In urine the average detection time is around 48 to 60 hours from last drink.

      Also these tests are often inaccurate giving off high rates of false/positives. But your probation officer likely won't care that these tests are crap, and will violate your probation if it comes back positive regardless of your assertion you didn't drink alcohol.

      So if they are giving you this EtG test as part of your probation, stay away from any cleaning products with alcohol in them (this includes those alcohol hand wipes.) A case in point is a study that was done on nurses who were given EtG test and most failed the test yet did not drink alcohol in the past 80 hours. It was determined the the alcohol wipes and hand sanitizers they were using to clean their hands was causing the false/positives.

      http://www.uatests.com/types-of-drug-tests/alcohol-drug-tests/etg-ethyl-glucuronide-test.html

      http://www.alcohol-test-info.com/How_Long_Will_Alcohol_Stay_In_the_System_For_Urine_Tests.html

      http://www.erowid.org/chemicals/nicotine/nicotine_testing.shtml

  23. QUESTION:
    Drug test -- cannabis?
    I'm 18 years old, around 5'7 and I weigh about 140 pounds; a comparatively small guy and have cannabis in my system. I've recently applied for a job working concessions at a sports arena and I have an interview in 5 days. Pretty sure there is a drug screening. It's been in my system since two days ago and I have since been drinking at least a gallon of water a day (but I don't know if that's enough or too much) and using the bathroom like crazy. That is all I've been doing about the situation. Any other tips?

    I use to use cannabis at least once a week and I am not aware of how much of an effect it can have regarding such.
    I am aware that on average it takes maybe two weeks to a month for it to be out of your system and possibly 25-60 days if you're a prolonged user.

    Yeah, I've only smoked a couple of times within the past few weeks. Maybe once or twice a week. And usually only a small tobacco pipe load or so each time.

    I am in fact thinking of investing in some kind of detoxifying product just to be even safer.
    Oh, and in the case of a hair test, shaving your head does not matter. They can use body hair as well.

    • ANSWER:
      "The most common period of time is anywhere from 3-30 days, depending on your metabolism and the amount of marijuana that you ve smoked. This is unfortunate, since it means that while most drug tests can only turn up evidence of other drugs if you ve been taking the drug within a few days of the drug test, marijuana could still be detected in a urine test up to a month after the last time it is used. If you smoke it occasionally it will remain in your system for up to 10 days. If you smoke marijuana on a regular basis it will stay in your system for as long as 45 days, and if you smoke marijuana at a constant pace, it can stay in the body for 90 days, Marijuana is fat soluble. It stores in the fat cells of the body, the brain, the liver, the kidneys, in other words the major organs.

      Hair tests are even worse, since your body stores THC in the hair follicles. For this reason, the previous answers to How long does marijuana stay in your system? are only useful if you re going to be forced to take a urine test. For the hair test, depending on the amount of hair that the company takes, it s possible that marijuana could be detected up to three years after the last time that you smoke.

      If you re worried about testing positive for marijuana, then you should definitely invest in some of the great Detoxifying Products for removing THC out of your system that will help you to test negative for marijuana use. This is due to the fact that it takes so long for the THC to leave your system that you ll probably test positive if you do not. If you don t have an entire month to wait before you need to take the test, then you should definitely think about some other options to keep from testing positive. If you re not sure how to tell whether or not the marijuana detox is working, then there are several things that you can do. First of all, you can also purchase a small drug testing kit. Purchase Drug Detection Kits Here This drug testing kit will allow you to test and make sure that you re no-longer testing positive for marijuana. Just detoxify, and then use the drug test kit to check your urine. After using the drink, it should come up negative. "

  24. QUESTION:
    NIACIN AND DRUG TEST?
    Hey! I have an interview tonight, and this is what's up...

    I took 6 niacins 500mg yesterday
    just took 3 this morning
    my interview is tonight at 9
    i know i have to take a drug test within 24 hours of that
    the last time i smoked was saturday morning

    what should i do to pass?
    Anybody who has a remedy?

    • ANSWER:
      1.Niacin does work depending on what type and how you use it.

      2.Everything hamrrfan said is unreliable. ( http://www.drug-test-facts.com/niacin AND
      http://www.nutritional-supplements-health.com both sell products for passing drug test. Its only natural for these companies to tell you that nothing else works. Notice that neither site back up their claims with any scientific evidence.

      3.(http://en.wikipedia.org/wiki/Niacin) I read through the entire article in case you didn't. Nowhere in that article does it ever mention anything about drug testing.

      4. (http://www.washingtonpost.com/wp-dyn/content/article/2007/04/27/AR2007042702610.html) and (http://www.ureasample.com/pass-drug-test/beat-drug-test.shtml) are the sites that everybody seems to be getting their information off. The only thing washingtonpost.com said is that there has been cases of people overdosing on niacin. It said nothing about niacin not working to mask drugs. To go even further, read this excerpt.("Emergency physicians should consider attempts to mask urine drug screens as a cause of unusual presentation in high-risk populations, such as military, patients on probation and with a history of drug abuse,"). Where in this does it say anything about niacin not working. The second website ureasample.com is also completely unreliable. First off the site sells urine sample kits. If there was a way to beat their urine sample why in the world would they tell anybody. Its only natural for this site to tell you that niacin cannot beat their drug test.

      Now for the real deal. If they send your drug sample to a lab theres a higher chance of detection. If its an instant pee test then your probably good if you drink lots of water with the niacin. NIACINAMIDE DOES NOT WORK. ONLY REAL NIACIN. NOT NIACINAMIDE OR ANYTHING CLAIMING TO BE NIACIN. DON'T WASTE YOUR MONEY ON NO FLUSH NIACIN.IT DOESN'T WORK AT ALL.

      HOW TO BEAT A DRUG TEST (For lab and instant tests alike)

      1.WATER WATER WATER!!! D.O.T test are the most common lab tests. A DOT test is the abbreviation for a Department of Transportation. This means the testing guidelines have been regulated by the DOT, and if the guidelines are not followed the results are considered invalid.

      The first test for the DOT is a five panel EMIT. The cut off for marijuana on the screen is 50 ng/ml, which is a composite of all 31 metabolite concentrations. If the sample is below this level the test is over as a passing status. If the sample is over 50 ng/ml the sample is sent on to a GC/MS for confirmation. The cutoff for the confirmation is lower at 15 ng/ml because the machine only identifies one of the 31 metabolites which is the 11-nor-D-9-tetrahyrocanibinolic acid. To pass, the one metabolite must be below the 15-ng/ml cutoff. THE MORE WATER YOU DRINK THE BETTER YOUR CHANCES OF FALLING BELOW THE 50NG/ML SCREEN. ITS CALLED SATURATION!! YOU DO NOT WANT YOUR SAMPLE TO BE SENT TO A GC/MS(Gas Chromatography/Mass Spectrometry)

      2. At least a week before the test start on regiment of niacin, water, and cranberry juice and Gatorade. the Gatorade restores the electrolytes lost by all the peeing. light foods are all right but nothing heavy. It is proven that when your eat less your body burns less fat instead of more. If you burn fat the THC stored in it will be released into your blood stream.DO NOT WORKOUT IF YOUR TEST IS WITHING A COUPLE OF DAYS. EXERCISING RELEASES THC STORED IN FAT INTO THE BLOODSTREAM. VERY BAD!!!

      3. On the day of the test drink lots of water. take about 3000mg of niacin. make sure you pee at least 5 times before the test if you just smoked because THC build up in the urinary system.

      5. THIS IS THE MOST IMPORTANT OF THEM ALL. IN ANY ELECTION WHETHER SMALL OR BIG MAKE SURE YOU VOTE FOR PRO MARIJUANA LEGALIZATION CANDIDATES. THAT IS THE ONLY WAY TO MAKE YOUR QUESTION AND MY ANSWER COMPLETELY IRRELEVANT.

      gREEn TeaM

      P.S. If you like my response best answer me please. thanks.

  25. QUESTION:
    Durgs,Drugs,Drugs HELP ME PLEASE?
    ok so i just smoked headies ok how does headiesstay in your system i havent smoked since 2 years ago in feb. will these headies stay in my sytem

    • ANSWER:
      Marijuana Detection Times:

      Frequent users blood drug test (defined as someone who smokes several times per week)
      THC: 4-8 hours after smoking.
      THC by-product: 2 or more weeks after smoking.

      Frequent users urine drug test
      THC by-product: 2 weeks to a month after smoking
      (3 months for extremely heavy users)

      Infrequent users blood drug test
      THC: 3-4 hours after smoking
      THC by-product: 2-3 days after smoking.

      Infrequent users urine drug test
      THC by-product: up to 10 days after smoking.

      ~~~~~~~~
      'According to the website of Columbia University's Health Services:

      Marijuana itself does not "stay" in your system, but the main chemical in marijuana, THC, does. In fact, it may stay in your system forever because it is stored in fatty tissues of various organs.

      Despite being stored in body fat, THC is only detectable for a certain amount of time. There are many variables that determine how long THC will remain detectable in your system, including height, weight, age, metabolism, amount smoked/ingested, and methods to clean. Many drug tests, including urine tests, look for 9-carboxy-THC which is the by-product of your body metabolizing the THC in your fat.'


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