9+ CT Pre-Employment Drug Tests: A Guide


9+ CT Pre-Employment Drug Tests: A Guide

Evaluating prospective employees for substance use before hiring is a common practice. This process typically involves laboratory analysis of biological samples, such as urine, to detect the presence of specific drugs. For example, a transportation company might screen applicants for controlled substances to ensure workplace safety.

This screening offers several advantages. It can contribute to a safer and more productive work environment by mitigating risks associated with substance abuse. Furthermore, it can protect a company’s reputation and reduce potential liabilities. Historically, concerns about workplace safety and productivity fueled the development of these practices. Over time, legal frameworks and evolving societal norms have shaped the current landscape of workplace drug screening.

Further exploration of this topic will cover legal considerations, ethical implications, and practical implementation strategies for organizations.

1. Applicant Consent

Securing informed consent from applicants prior to drug screening is a critical component of ethical and legally sound pre-employment practices. This process ensures transparency and respects individual autonomy. Understanding the nuances of consent within the context of pre-employment screening is essential for organizations.

  • Legal Requirements:

    Consent requirements vary by jurisdiction. Some states mandate specific consent forms or procedures, while others operate under implied consent. For example, some states may require written consent while others might not require it, but can still take action based on company drug testing policies . Employers must understand applicable legal requirements to ensure compliance. Failure to obtain proper consent can expose organizations to legal challenges and jeopardize the hiring process.

  • Information Disclosure:

    Applicants must receive clear and comprehensive information about the drug screening process before providing consent. This includes the types of tests used, the substances screened for, the consequences of a positive result, and how the results will be handled. For instance, an organization should disclose whether a positive test for marijuana in a state where recreational use is legal will still disqualify an applicant. Transparency builds trust and allows candidates to make informed decisions.

  • Voluntary Nature:

    Consent must be genuinely voluntary, free from coercion or undue pressure. Applicants should feel empowered to decline testing without fear of reprisal. A situation where an applicant feels compelled to consent due to fear of losing the job opportunity undermines the ethical basis of the consent process. Maintaining the voluntary nature of consent safeguards applicant rights and promotes fairness.

  • Documentation and Record-Keeping:

    Proper documentation of the consent process is crucial. Maintaining records of consent forms, disclosures, and test results ensures compliance and protects both the applicant and the organization. These records can be essential in defending against potential legal challenges or disputes. Thorough record-keeping demonstrates due diligence and transparency.

By adhering to these principles of applicant consent, organizations can ensure their pre-employment drug screening practices are both legally compliant and ethically sound. This approach fosters a fair and transparent hiring process while upholding individual rights and promoting a safe and productive work environment.

2. Drug Testing Policy

A comprehensive drug testing policy is the cornerstone of any pre-employment screening program. It provides a framework for legal compliance, ethical considerations, and procedural clarity. A well-defined policy ensures fairness and transparency throughout the screening process, protecting both the organization and the applicant.

  • Scope and Applicability

    The policy should clearly define who is subject to testing, such as all applicants, specific job categories, or those in safety-sensitive positions. For example, a transportation company might mandate testing for all drivers but not for office staff. Defining the scope ensures consistent application and avoids discriminatory practices. Clear applicability parameters are essential for legal defensibility.

  • Substances Tested

    The policy must specify which substances are included in the screening panel. This list should align with industry regulations, job requirements, and legal limitations. For instance, testing for prescription medications requires careful consideration of privacy laws and potential discrimination against individuals with disabilities. Transparency regarding the substances tested ensures fairness and allows applicants to disclose relevant medical information.

  • Testing Procedures

    Detailed testing procedures, including sample collection methods, laboratory analysis, and chain-of-custody protocols, ensure accuracy and reliability. Adherence to established standards, such as those set by the Substance Abuse and Mental Health Services Administration (SAMHSA), safeguards the integrity of the process. Rigorous procedures minimize the risk of errors and legal challenges.

  • Consequences of a Positive Result

    The policy should outline the consequences of a positive test result, including potential disqualification from employment or the opportunity to participate in a substance abuse program. Clearly defined consequences ensure consistent application and allow applicants to understand the potential implications of the testing process. A transparent approach fosters fairness and manages expectations.

A robust drug testing policy is indispensable for effective pre-employment screening. By addressing these key facets, organizations can establish a program that is legally compliant, ethically sound, and aligned with business objectives. This framework contributes significantly to a safe, productive, and compliant workplace.

3. Testing Procedures

Rigorous testing procedures are crucial for ensuring the accuracy, reliability, and legal defensibility of pre-employment drug screening. These procedures encompass all aspects of the testing process, from sample collection to laboratory analysis, and adherence to established protocols is paramount.

  • Sample Collection

    Proper sample collection methods are essential to maintain the integrity of the specimen and prevent contamination or tampering. Typically, urine samples are collected under direct observation in a controlled environment. This process adheres to strict chain-of-custody protocols, documenting the handling of the sample from collection to analysis. For example, the collector must verify the donor’s identity, ensure the sample is sealed and labeled correctly, and document any unusual occurrences. Strict adherence to these protocols protects against challenges to the validity of the test results.

  • Laboratory Analysis

    Accredited laboratories utilize standardized methodologies, such as immunoassay and gas chromatography-mass spectrometry (GC-MS), to analyze samples for the presence of specific drugs. Immunoassay screening provides initial results, while GC-MS confirmation testing offers greater specificity and accuracy. For instance, if an immunoassay screen indicates the presence of a particular drug, GC-MS confirmation is necessary to definitively identify and quantify the substance. This two-step process minimizes the possibility of false positives and ensures accurate reporting.

  • Chain of Custody

    Maintaining a secure chain of custody is critical throughout the testing process. Detailed documentation tracks the handling and transfer of the sample at every stage, from collection to analysis and reporting. This documentation includes information about the individuals involved, dates and times of transfers, and any changes in the sample’s custody. A secure chain of custody safeguards the integrity of the sample and ensures the results are admissible in legal proceedings. Any break in the chain of custody can compromise the validity of the test results.

  • Confirmatory Testing and Cutoff Levels

    When initial screening tests yield positive results, confirmatory testing using a more sensitive and specific method, like GC-MS, is necessary. This helps eliminate false positives. Furthermore, laboratories utilize established cutoff levels to determine whether a substance is present at a concentration considered positive. These cutoff levels are determined by regulatory bodies and scientific consensus to minimize the risk of misinterpretation. This dual approach, combining confirmatory testing and cutoff levels, ensures accurate and reliable results.

Adhering to these rigorous testing procedures is essential for maintaining the integrity and legal defensibility of pre-employment drug screening programs. These procedures contribute significantly to ensuring fair and accurate results, which protects both the employer and the applicant. By prioritizing standardized protocols and rigorous quality control, organizations can establish a robust and reliable screening process that supports a safe and productive workplace.

4. Legal Compliance

Navigating the legal landscape surrounding pre-employment drug screening is crucial for organizations. Compliance with applicable federal and state laws is essential to avoid legal challenges and ensure a fair and ethical hiring process. Understanding these legal parameters protects both employers and applicants.

  • Federal Laws

    Federal laws, such as the Americans with Disabilities Act (ADA), impact how drug testing is conducted. The ADA prohibits discrimination against qualified individuals with disabilities, including those with a history of substance abuse who are currently in recovery. For example, employers cannot automatically disqualify applicants based solely on a past history of addiction. Furthermore, the ADA requires reasonable accommodations for individuals with disabilities, which may include modifications to the drug testing process. Careful consideration of these federal mandates is essential for compliance.

  • State Laws

    State laws vary significantly regarding drug testing practices. Some states have legalized recreational or medical marijuana, impacting how positive marijuana tests are handled. For example, in a state where medical marijuana is legal, an employer may need to accommodate an applicant’s use if it is prescribed for a legitimate medical condition. Other states may restrict the types of drugs tested or mandate specific procedures for sample collection and analysis. Organizations must understand and adhere to applicable state laws to ensure compliance.

  • Privacy Considerations

    Protecting applicant privacy is paramount throughout the drug testing process. Federal and state laws govern the confidentiality of test results and how they can be used. For example, employers must ensure that test results are not disclosed to unauthorized individuals and are stored securely. Additionally, applicants have a right to review their test results and challenge them if necessary. Respecting privacy rights is not only ethically sound but also legally mandated.

  • Discrimination and Adverse Action

    Drug testing policies and procedures must be implemented fairly and consistently to avoid discrimination. Adverse employment actions, such as rescinding a job offer based on a positive drug test, must be handled carefully and in accordance with applicable laws. For instance, if an applicant tests positive for a substance due to a legitimate prescription medication, an employer cannot automatically disqualify them. Organizations must ensure their practices comply with anti-discrimination laws and provide due process to applicants.

Legal compliance is a fundamental aspect of pre-employment drug screening. By understanding and adhering to relevant federal and state laws, organizations can establish a legally sound and ethical screening program. This approach protects both the organization and the applicant while contributing to a safe and productive workplace. Ignoring legal requirements can result in significant legal challenges and reputational damage, underscoring the importance of meticulous legal compliance.

5. Candidate Privacy

Protecting candidate privacy is paramount in pre-employment drug testing. This involves safeguarding sensitive personal information throughout the screening process, from sample collection to result handling and storage. Maintaining confidentiality builds trust, ensures legal compliance, and upholds ethical standards. Failure to prioritize privacy can lead to legal repercussions and reputational damage.

  • Confidentiality of Test Results

    Test results are confidential medical information and should be handled with utmost discretion. Access to results should be restricted to authorized personnel, such as hiring managers and medical review officers. Information sharing outside of these designated individuals requires explicit consent from the candidate. For instance, disclosing test results to unauthorized colleagues or external parties constitutes a privacy breach. Strict confidentiality protocols protect candidate reputations and maintain legal compliance.

  • Secure Data Storage

    Drug test results and other related medical information must be stored securely to prevent unauthorized access or disclosure. This may involve utilizing encrypted databases, password-protected systems, and restricted physical access to storage locations. Maintaining secure records protects sensitive data from breaches and misuse. For example, utilizing cloud-based storage with robust encryption safeguards information against cyber threats. Prioritizing data security demonstrates a commitment to candidate privacy.

  • Transparency and Disclosure

    Candidates should be informed about the drug testing process, including what substances are being tested for, how the results will be used, and who will have access to the information. Providing clear and concise information upfront empowers candidates to make informed decisions and fosters trust. For example, organizations should explain how positive test results will be handled and what recourse candidates have. Transparency promotes ethical practices and minimizes potential misunderstandings.

  • Compliance with Privacy Laws

    Adherence to relevant privacy laws, such as the Health Insurance Portability and Accountability Act (HIPAA) where applicable, is essential. These laws dictate how medical information, including drug test results, can be collected, stored, and used. Understanding and complying with these regulations is crucial for legal compliance and maintaining ethical standards. For instance, organizations must ensure they are following proper procedures for obtaining consent and disclosing information. Legal compliance safeguards candidate privacy and protects the organization from potential legal challenges.

Candidate privacy is an integral component of ethical and legally compliant pre-employment drug testing. By prioritizing confidentiality, secure data storage, transparency, and legal compliance, organizations demonstrate a commitment to protecting candidate rights and maintaining ethical standards. These practices contribute to a fair and trustworthy hiring process while mitigating legal risks and fostering positive candidate experiences. Failing to prioritize privacy can have significant consequences, highlighting the critical nature of these considerations in pre-employment screening.

6. Result Interpretation

Accurate and informed interpretation of drug test results is critical in pre-employment screening. This process requires careful consideration of various factors to ensure fair and legally sound hiring decisions. Misinterpretation can lead to erroneous conclusions, impacting both the applicant and the organization. Understanding the nuances of result interpretation is essential for a robust and ethical screening program.

  • Confirmatory Testing

    Initial positive results from screening tests necessitate confirmatory testing using more precise methods, such as gas chromatography-mass spectrometry (GC-MS). This ensures the accuracy and reliability of the results, minimizing the possibility of false positives. For example, a positive screening result for amphetamines might be triggered by certain over-the-counter medications. Confirmatory testing distinguishes these legitimate uses from illicit drug use. This process is crucial for avoiding incorrect conclusions based on preliminary screening results.

  • Cutoff Levels

    Laboratories utilize established cutoff levels to determine whether a substance is present at a concentration deemed positive. These levels, established by regulatory bodies and scientific consensus, represent the minimum concentration required for a positive result. For instance, a urine sample with a drug concentration below the cutoff level is considered negative, even if trace amounts of the substance are present. Understanding these cutoff levels is crucial for accurate result interpretation and avoids misclassifying negative results as positive.

  • Medical Review Officer (MRO) Review

    A Medical Review Officer (MRO), a licensed physician, plays a crucial role in interpreting drug test results. The MRO reviews the laboratory findings, considers any reported medications or medical conditions, and contacts the applicant to discuss potential explanations for positive results. This process ensures a fair and comprehensive review, considering legitimate medical explanations before finalizing the interpretation. For example, an applicant taking a prescribed medication that could trigger a positive result has the opportunity to provide documentation to the MRO, ensuring accurate interpretation.

  • Legal and Ethical Considerations

    Result interpretation must adhere to legal and ethical guidelines. Confidentiality must be maintained throughout the process, and results should only be shared with authorized personnel. Furthermore, any adverse employment actions taken based on test results must comply with applicable laws and regulations. For example, an employer cannot automatically disqualify an applicant based on a positive marijuana test if they reside in a state where its use is legal, unless safety regulations dictate otherwise. Careful consideration of legal and ethical ramifications is essential for responsible result interpretation.

Accurate result interpretation is the linchpin of a robust and legally sound pre-employment drug testing program. By incorporating confirmatory testing, understanding cutoff levels, utilizing MRO review, and adhering to legal and ethical standards, organizations can ensure fair and accurate assessments. This meticulous approach protects both the applicant and the organization while contributing to a safer and more compliant workplace. The integrity of the entire screening process hinges on accurate and informed result interpretation.

7. Adverse Action Process

Pre-employment drug testing sometimes necessitates adverse action against applicants. Adverse action, such as rescinding a conditional job offer, requires a legally compliant and ethically sound process. This process protects applicant rights and ensures fairness while allowing organizations to make informed hiring decisions based on test results. Understanding this process is crucial for both employers and applicants.

  • Notification and Opportunity to Respond

    Before taking adverse action, organizations must notify applicants of the positive test result and provide an opportunity to explain the result. This may involve a conversation with a medical review officer (MRO) to discuss potential legitimate medical explanations, such as prescribed medications. For example, an applicant taking a prescribed opioid for pain management could provide documentation to explain the positive test result. This step ensures fairness and allows applicants to address potential misinterpretations.

  • Verification of Test Results

    Employers must verify the accuracy of the positive test result before taking adverse action. This may involve reviewing chain-of-custody documentation, confirming the laboratory’s accreditation, and ensuring proper testing procedures were followed. For instance, verifying the sample collection process and the laboratory’s adherence to quality control standards strengthens the validity of the results. This step protects against erroneous adverse actions based on flawed test results.

  • Consideration of Legal Requirements

    Adverse actions must comply with all applicable federal and state laws, including anti-discrimination laws and regulations related to medical marijuana. For example, in states where medical marijuana is legal, employers may need to accommodate applicants who use it for legitimate medical reasons, unless safety regulations strictly prohibit such use. Understanding and adhering to legal requirements is essential for avoiding legal challenges and ensuring fair treatment of applicants.

  • Documentation and Record-Keeping

    Thorough documentation of the adverse action process is essential. This includes documenting all communication with the applicant, the rationale for the adverse action, and any supporting evidence. Maintaining detailed records protects the organization in case of legal disputes and demonstrates adherence to a fair and consistent process. For example, documenting the applicant’s response to the positive test result and the organization’s subsequent decision-making process strengthens legal defensibility. Meticulous record-keeping is crucial for transparency and legal compliance.

The adverse action process is integral to pre-employment drug testing. By adhering to a legally compliant and ethically sound process, organizations can ensure fair treatment of applicants while making informed hiring decisions. This careful approach protects both the applicant’s rights and the organization’s interests. A transparent and well-documented adverse action process contributes to a more robust and legally defensible pre-employment screening program.

8. Substance Abuse Programs

Substance abuse programs play a crucial role in the broader context of pre-employment drug testing. While testing identifies potential substance use issues, these programs offer a pathway to recovery and reintegration into the workforce. Understanding the connection between these programs and pre-employment testing is essential for promoting a supportive and healthy work environment.

  • Referral and Access

    Pre-employment testing can serve as a catalyst for individuals to seek help for substance abuse. Organizations can incorporate information about available resources and treatment programs into their drug testing policies. For instance, providing a list of local support groups or treatment centers can encourage individuals to seek assistance. This proactive approach can facilitate access to care and support recovery efforts.

  • Return-to-Work Policies

    Substance abuse programs can be integrated into return-to-work policies for individuals who test positive during pre-employment screening. Organizations may offer conditional employment contingent on successful completion of a treatment program. For example, an applicant who tests positive for marijuana could be offered the position upon completion of a substance abuse program and subsequent negative drug test. This approach balances the organization’s need for a drug-free workplace with support for employee well-being.

  • Education and Prevention

    Information about substance abuse programs can be incorporated into employee education and prevention initiatives. This raises awareness about available resources and promotes a culture of support within the organization. For example, workshops or online resources can educate employees about the signs of substance abuse and how to access help for themselves or colleagues. Promoting awareness can encourage early intervention and prevent escalation of substance use issues.

  • Legal and Ethical Considerations

    Offering access to substance abuse programs aligns with legal and ethical obligations to accommodate individuals with disabilities, including those with substance use disorders. The Americans with Disabilities Act (ADA) requires reasonable accommodations for qualified individuals with disabilities, which may include providing access to treatment programs. For instance, allowing an employee time off to attend treatment sessions can be considered a reasonable accommodation. Adhering to legal and ethical guidelines ensures a fair and supportive workplace.

Integrating substance abuse programs into pre-employment drug testing strategies contributes to a more comprehensive and compassionate approach to substance use in the workplace. By providing resources, supporting recovery, and promoting education, organizations can foster a healthier and more productive work environment while upholding legal and ethical responsibilities. This multifaceted approach demonstrates a commitment to employee well-being and reinforces a supportive organizational culture. It further emphasizes the importance of viewing pre-employment drug testing not merely as a gatekeeping mechanism, but as an opportunity for intervention and support.

9. Industry Regulations

Industry-specific regulations significantly influence pre-employment drug testing practices. These regulations often dictate specific requirements for testing, impacting which substances are screened, testing frequency, and permissible procedures. Understanding the interplay between industry regulations and drug testing is crucial for organizations to maintain legal compliance and ensure workplace safety. For instance, the Department of Transportation (DOT) mandates strict drug and alcohol testing regulations for safety-sensitive positions within the transportation industry, including truck drivers and airline pilots. These regulations specify which substances are tested, require pre-employment testing, and outline procedures for post-accident and random testing. Similarly, the nuclear energy industry adheres to stringent regulations enforced by the Nuclear Regulatory Commission (NRC) to maintain safety and security protocols. These regulations often involve extensive background checks and drug screenings to mitigate risks associated with substance abuse.

The practical implications of these regulations are substantial. Non-compliance can result in significant penalties, including fines, license revocations, and legal repercussions. Moreover, adherence to industry regulations contributes to enhanced workplace safety by mitigating risks associated with substance abuse. For example, in the construction industry, where operating heavy machinery and working at heights pose inherent safety risks, compliance with drug testing regulations reduces the likelihood of accidents caused by impairment. Similarly, in healthcare, where patient safety is paramount, adherence to strict drug testing protocols ensures a drug-free environment, protecting both patients and healthcare providers. Understanding these industry-specific regulations is not merely a matter of legal compliance but a critical component of maintaining a safe and productive workplace.

In conclusion, industry regulations play a pivotal role in shaping pre-employment drug testing practices. Organizations operating in regulated industries must understand and adhere to specific requirements to ensure legal compliance and promote workplace safety. Failing to comply with these regulations can have significant consequences, ranging from financial penalties to jeopardizing public safety. Recognizing the crucial link between industry regulations and pre-employment drug testing is essential for organizations to operate responsibly and maintain a safe and compliant work environment. This understanding contributes to a more comprehensive and effective approach to workplace safety and reinforces the importance of tailored drug testing strategies across diverse industries.

Frequently Asked Questions

This section addresses common inquiries regarding pre-employment drug screening, providing clarity on important aspects of the process.

Question 1: How are positive test results handled?

Positive results are typically reviewed by a Medical Review Officer (MRO) who contacts the applicant to discuss potential explanations, such as prescribed medications. If no legitimate medical explanation exists, the employer determines the appropriate course of action, which may include rescinding the job offer.

Question 2: What substances are typically screened for?

Screening panels often include common drugs such as marijuana, cocaine, amphetamines, opiates, and phencyclidine (PCP). Specific substances tested may vary depending on industry regulations, job requirements, and state laws.

Question 3: Can prescription medications cause a positive test result?

Certain prescription medications can trigger a positive result. Applicants should disclose all prescribed medications to the testing facility and MRO to ensure accurate interpretation of the results. Providing supporting documentation, such as a prescription, is crucial.

Question 4: Are there legal limitations on drug testing?

Federal and state laws govern drug testing practices. Employers must comply with applicable regulations, including anti-discrimination laws and state-specific limitations on testing certain substances like marijuana.

Question 5: How is applicant privacy protected during the process?

Strict confidentiality protocols safeguard applicant privacy. Test results are considered confidential medical information and are only shared with authorized personnel. Secure data storage and adherence to privacy laws are essential components of the process.

Question 6: What happens if an applicant refuses a drug test?

Refusal to undergo drug testing is typically grounds for disqualification from the hiring process. Employers generally view refusal as a violation of company policy and an indication of potential substance use issues.

Understanding these key aspects of pre-employment drug screening contributes to a more informed and transparent process for both employers and applicants. Compliance with legal and ethical standards is paramount for ensuring fairness and maintaining a safe and productive work environment.

Further information on specific aspects of pre-employment drug screening can be found in the preceding sections of this article.

Tips for Navigating Pre-Employment Drug Screening

Successfully navigating pre-employment drug screening requires awareness and preparation. The following tips offer guidance for both applicants and organizations.

Tip 1: Understand Company Policy:
Applicants should thoroughly review the organization’s drug testing policy. This policy outlines procedures, substances screened, and potential consequences of positive results. Understanding expectations beforehand allows candidates to make informed decisions.

Tip 2: Honesty and Disclosure:
Open communication with the testing facility and Medical Review Officer (MRO) is crucial. Disclosing prescribed medications or medical conditions that might affect test results ensures accurate interpretation and avoids misunderstandings. Providing supporting documentation, such as a prescription, is recommended.

Tip 3: Maintain a Healthy Lifestyle:
Avoiding exposure to substances that could trigger a positive result is essential. This includes refraining from recreational drug use and being mindful of potential exposure to secondhand smoke or contaminated products. Maintaining a healthy lifestyle demonstrates commitment to a drug-free workplace.

Tip 4: Know Your Rights:
Applicants should familiarize themselves with their legal rights regarding drug testing, including state-specific regulations and protections under the Americans with Disabilities Act (ADA). Understanding legal parameters empowers candidates to advocate for fair and compliant treatment.

Tip 5: Seek Professional Guidance:
If an individual has concerns about a potential positive result due to past substance use or medical conditions, consulting with a healthcare professional or legal expert is advisable. Professional guidance can provide clarity and support throughout the process.

Tip 6: Ensure Compliance for Employers:
Organizations must maintain compliance with all applicable federal and state laws governing drug testing. This includes adherence to anti-discrimination laws, state-specific regulations on tested substances, and ensuring a legally compliant adverse action process. Consult with legal counsel to ensure compliance and avoid legal challenges.

By following these guidelines, applicants and organizations can navigate pre-employment drug screening effectively and ethically. This contributes to a fair, transparent, and legally compliant process, fostering a safe and productive work environment.

This information provides practical guidance for navigating pre-employment drug screening. The subsequent conclusion summarizes the key takeaways of this comprehensive overview.

Conclusion

Connecticut pre-employment drug testing represents a multifaceted process with significant implications for both employers and prospective employees. This exploration has covered key aspects, including legal compliance, ethical considerations, testing procedures, result interpretation, and the role of substance abuse programs. Understanding these components is crucial for establishing a fair, transparent, and legally sound screening program. Furthermore, the discussion highlighted the importance of candidate privacy, accurate result interpretation, and a well-defined adverse action process. By adhering to best practices and legal requirements, organizations can leverage pre-employment drug testing to promote a safe and productive work environment while upholding individual rights.

Effective pre-employment drug testing requires ongoing evaluation and adaptation to evolving legal landscapes and societal norms. Striking a balance between workplace safety, individual rights, and ethical considerations remains a central challenge. Organizations must prioritize ongoing education, transparent communication, and a commitment to fair and legally compliant practices. This proactive approach will shape the future of workplace drug screening and contribute to a more informed and balanced approach to substance use in the workplace.