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Clean Water Act discharge permit · NPDES VAR10R491

PARKSTONE TECH PARK, Chantilly, VA: NPDES VAR10R491 discharge permit, effluent exceedances, inspections, penalties

PARKSTONE TECH PARK, held by Parkstone Tech Park, LLC, holds NPDES permit VAR10R491, which discharges to Cub Run. EPA’s file records it issued July 1, 2019 and expiring June 30, 2024. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

What the register holds for PARKSTONE TECH PARK: its NPDES ID, its permit type and status, its dates, its address in Chantilly, Virginia, its receiving water. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES VAR10R491.

Identity

Facility as filedPARKSTONE TECH PARK
Permittee as filedParkstone Tech Park, LLC
NPDES IDVAR10R491
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeCoverage under a general permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
ProgramConstruction stormwater
IssuedJuly 1, 2019
Expiration dateJune 30, 2024
Issuing agencyVA DEQ
AddressChantilly, VA 20151
Receiving waterCub Run
Receiving water impaired303(D) Listed
SubwatershedCub Run (HUC 020700100704)

Cited to the EPA ICIS-NPDES permit file (ECHO download).

Effluent limits and exceedances

EPA’s limits and effluent violation files hold no pollutant row for NPDES VAR10R491.

Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.

Inspections, violations and enforcement

EPA’s single-event violation file, as loaded, holds no violation for NPDES VAR10R491.

Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.

Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.

Watch this permit

One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, VAR10R491.

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How we handle your data → Privacy

EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID VAR10R491 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.

What this page shows

Across 61 storm water construction permits in Chantilly, 0.0% carry a violation on file, and PARKSTONE TECH PARK is included in that count. Chantilly's storm water construction permits on EPA's NPDES register total 61, including this permit. The Cub Run subwatershed holds 107 NPDES permits, this permit among them.