FREQUENCY SOURCES INC
16 MAPLE RD, Chelmsford, MA 01824
Having inspection records is common for businesses in regulated industries. Data and methodology
Inspection records
Oct 16, 1990#107421919Oct 16, 1990Referral (C) · Partial scope, Health#107421919$01 viol.1 violation$0 in penalties
Inspection #107421919
Dates
- Opened
- Oct 16, 1990
- Closing Conference Date
- Oct 16, 1990
- Closed
- Nov 23, 1990
Inspection
- Advance Notice
- No
- Owner Type
- Private
- Union Status
- No
- Number of Employees
- 400
- Related Activity
- 1 referral
Violations and Penalties
- Total Violations
- 1
- Violation Types
- 1 other-than-serious
- Initial Penalties
- $0
- Penalties on Record
- $0
- Site Address
- 16 Maple Road, Chelmsford, MA 01824
- Industry
- Not classified in OSHA's inspection record.
Referral Inspection: This inspection record is categorized as a referral inspection in the DOL OSHA enforcement data. Referral inspections can result from another agency, another OSHA activity, or another source referring a potential hazard to OSHA.
Violations
Violation list (1 of 1 shown)
| Citation | Standard | Type | Instances | Exposed | Initial | Current | Abatement | Contest | Final Order |
|---|---|---|---|---|---|---|---|---|---|
| 01001 | 1910.20 Access to Employee Exposure and Medical Records OSHA citation code: 19100020 G02 | Other | 1 | 300 | $0 | $0 | Oct 28, 1990 | - | - |
Nov 2, 1982#10146272Nov 2, 1982Complaint (B) · Partial scope, Health#10146272$01 viol.1 violation$0 in penalties
Inspection #10146272
Dates
- Opened
- Nov 2, 1982
- Closing Conference Date
- Nov 2, 1982
- Closed
- Jan 6, 1983
Inspection
- Advance Notice
- Not recorded
- Owner Type
- Not recorded
- Union Status
- No
- Number of Employees
- 461
- Related Activity
- 1 complaint
Violations and Penalties
- Total Violations
- 1
- Violation Types
- 1 other-than-serious
- Initial Penalties
- $0
- Penalties on Record
- $0
- Site Address
- 16 Maple Rd, Chelmsford, MA 01824
- Industry
- Not classified in OSHA's inspection record.
Complaint Inspection: This inspection record is categorized as a complaint inspection in the DOL OSHA enforcement data. OSHA can open complaint-driven inspections after receiving safety or health complaints from workers or their representatives.
Violations
Violation list (1 of 1 shown)
| Citation | Standard | Type | Instances | Exposed | Initial | Current | Abatement | Contest | Final Order |
|---|---|---|---|---|---|---|---|---|---|
| 01001 | 1910.101 Compressed Gases (General Requirements) OSHA citation code: 19100101 B | Other | 1 | - | $0 | $0 | Dec 3, 1982 | - | - |
Dec 9, 1977#10118578Dec 9, 1977Follow-Up (F) · Partial scope, Health#10118578$00 viol.0 violations$0 in penalties
Inspection #10118578
Dates
- Opened
- Dec 9, 1977
- Closing Conference Date
- Jan 26, 1978
- Closed
- Mar 10, 1984
Inspection
- Advance Notice
- Not recorded
- Owner Type
- Not recorded
- Union Status
- No
- Number of Employees
- 125
Violations and Penalties
- Total Violations
- 0
- Initial Penalties
- $0
- Penalties on Record
- $0
- Site Address
- 16 Maple Rd, Chelmsford, MA 01824
- Industry
- Not classified in OSHA's inspection record.
Follow-Up Inspection: This inspection record is categorized as a follow-up inspection in the DOL OSHA enforcement data. Follow-up inspections are used by OSHA after earlier enforcement activity and can be used to check later compliance status.
Apr 8, 1977#10058956Apr 8, 1977Complaint (B) · Partial scope, Health#10058956$02 viol.2 violations$0 in penalties
Inspection #10058956
Dates
- Opened
- Apr 8, 1977
- Closing Conference Date
- Apr 12, 1977
- Closed
- Feb 13, 1978
Inspection
- Advance Notice
- Not recorded
- Owner Type
- Not recorded
- Union Status
- No
- Number of Employees
- 125
Violations and Penalties
- Total Violations
- 2
- Violation Types
- 2 other-than-serious
- Initial Penalties
- $0
- Penalties on Record
- $0
- Site Address
- 16 Maple Rd, Chelmsford, MA 01824
- Industry
- Not classified in OSHA's inspection record.
Complaint Inspection: This inspection record is categorized as a complaint inspection in the DOL OSHA enforcement data. OSHA can open complaint-driven inspections after receiving safety or health complaints from workers or their representatives.
Violations
Violation list (2 of 2 shown)
| Citation | Standard | Type | Instances | Exposed | Initial | Current | Abatement | Contest | Final Order |
|---|---|---|---|---|---|---|---|---|---|
| 01001A | 1910.1000 Air Contaminants OSHA citation code: 19101000 A02 | Other | 10 | - | $0 | $0 | Oct 24, 1977 | - | - |
| 01001B | 1910.1000 Air Contaminants OSHA citation code: 19101000 E | Other | 10 | - | $0 | $0 | May 16, 1977 | - | - |
Penalty amounts may differ from final amounts after settlement or judicial review. How to read these records
About these records
A company page groups inspections with the same normalized employer name, city and state; it is not a legal-entity identifier (how pages are grouped).
This page displays public OSHA enforcement data. Status text follows the DOL inspection record first and may include citation-level context when the inspection feed and citation records are out of sync. Penalty amounts shown reflect the latest penalty amounts on record in the DOL database and may differ from initial assessments or final amounts. This is not an official OSHA resource.
OSHA's public enforcement data does not publish a "guilty" or "not guilty" field for inspections. The closest outcome fields available are the citation counts, penalty amounts, contest dates, final-order dates, and the inspection close date shown on this page. How to interpret these status fields. How initial and current penalties are recorded.
OSHA may publish multiple citation rows in the same inspection with the same standard and penalty fields. Separate rows can still differ in OSHA metadata such as citation identifier, recorded instance count, exposed workers, or gravity value. Contest and Final Order columns show citation-level dates from OSHA's enforcement record. A dash means OSHA's record does not currently show that activity for the citation.
Understanding These Penalties
The maximum penalty for a serious violation in 2025 is $16,550 per violation. For willful violations, the range is $11,823 to $165,514. The current penalty column shows the latest amount on record in OSHA's database for each citation. When the current penalty differs from the initial penalty, OSHA's records show that the amount changed during the enforcement process, but this page does not determine the specific reason for each change. Penalty amounts are set by OSHA and adjusted annually for inflation.
4 inspections, 1977 to 1990. Each row is one inspection; point at or tap a row for its dates and totals.
Source: DOL OSHA enforcement data (inspections and violations), linked via activity_nr (exact government key).
Penalty changes: Amounts shown reflect what OSHA's enforcement record publishes. The reason for any change is not stated unless OSHA's record explicitly says so.
Short cases: When a case closed soon after it opened, the closed marker is drawn slightly to the right so both markers stay visible. Each row's card shows the exact dates.