Laboratory Data Package Review: A QA Checklist by Validation Stage
Laboratory data package review as a QA checklist by EPA validation stage: what to verify at Stage 1, 2A and 2B on an environmental project.
Guides & Resources
Practical guides for water quality compliance professionals.
Statistical Outlier Treatment in a Water Quality Monitoring Dataset: Rosner's Test, Worked
Statistical outlier treatment in a water quality monitoring dataset: Rosner's test worked on 28 background results, plus what to do after it fires.
PFAS MCL Compliance and Groundwater Reporting: What Comes After the April 2024 Final Rule
PFAS MCL compliance and groundwater reporting: EPA Method 533 vs 537.1, ppt-level sampling, non-detect reporting, and the 2026 proposed rule changes.
Groundwater Monitoring Well Sampling Frequency: How Regulatory Programs Set the Schedule
Groundwater monitoring well sampling frequency under RCRA, Superfund and NPDES, plus how to request a reduction with Darcy velocity and trend data.
Environmental Data Management Workflow: Field Collection to Compliance Report
Environmental data management workflow: field sampling, EDD import, QA/QC review, standards selection, exceedance tables, and compliance report delivery.
EQuIS Alternatives for Environmental Data Management: What Small Firms Are Evaluating
Comparing EQuIS competitors for small firm environmental data management: ESdat, Geotech, EDD formats, qualifier handling, and real pricing tiers.
When to Switch from EQuIS: A Decision Framework for Environmental Consulting Firms
When to leave EQuIS: signs the fit has broken down, migration cost to estimate first, and decision paths for small environmental consulting firms.
Phase II ESA Regulatory Database Review: What Records to Pull and How to Document Findings
Phase II ESA regulatory database review: ASTM E1527-21 source list, search radii, EDR vs agency-portal pulls, and conceptual-site-model linkage.
Managing Compliance Deadlines Across Multiple Environmental Permits: Tracking Systems That Work
How to track compliance deadlines for multiple environmental permits: NPDES, RCRA, MSGP. Inventory, alerts, owner assignment, ECHO reconciliation.
Calculating Effluent Permit Limits: Technology-Based vs Water Quality-Based Standards
Calculate NPDES water discharge permit limits step by step. Mass-balance WQBEL example with copper criteria, dilution math, and TBEL-vs-WQBEL comparison.
Water Quality Trend Analysis: A Mann-Kendall Worked Example for Compliance Monitoring
Mann-Kendall worked example for water quality trend analysis: S statistic, variance, Z-score, and significance with 8 quarters of TCE data.
EPA NPDES eReporting Requirements: NetDMR, NeT, and the Submittal Stack
EPA NPDES eReporting Phase 2 walkthrough: NetDMR vs NeT, state implementation, CDX setup, ICIS receipt verification, common submittal mistakes.
Environmental Database Software for Small Consulting Firms: When to Stay on Excel, When to Switch
Decision framework for environmental database software at small consulting firms. Four paths from Excel to enterprise EDMS by workflow shape.
How to Calculate Pollutant Loading for TMDL Reports: Flow-Weighted Concentrations and Worked Examples
How to calculate pollutant loading for TMDL reports: core formula, FWMC, WLA+LA+MOS budget, common errors, with worked examples.
Water Quality Data Gap Filling Methods for Environmental Consulting: Non-Detects, Kaplan-Meier, and ROS
Water quality data gap filling methods for environmental consulting: non-detect substitution, Kaplan-Meier, ROS, and when each applies.
Industrial Stormwater Permit Compliance Checklist: SWPPP, Benchmark Monitoring, and Annual Reports
Industrial stormwater permit compliance checklist: SWPPP content, benchmark monitoring, ACSCE, NetDMR annual report, and pre-inspection punch list.
Groundwater Monitoring Data Management: From Field Collection to Regulatory Submission
How to manage groundwater monitoring data for compliance: field records, lab EDD import, validation, screening comparison and regulatory submission.
EarthSoft EQuIS Alternatives for Site Investigation Data: A Decision Framework
Alternatives to EarthSoft EQuIS for site investigation data, ranked by firm size, matrix complexity, EDD import and regulatory standard coverage.
NPDES Exceedance Reporting: Timelines, Required Content, and Enforcement Context
NPDES exceedance reporting and permit violation notification: the 24-hour oral call, 5-day written report, DMR entry, and SNC criteria explained.
How to Submit NPDES Discharge Monitoring Reports: NetDMR Workflow and Common Rejection Errors
How to submit an NPDES discharge monitoring report through NetDMR: data prep, calculated values, non-detects, NODI codes and common rejection errors.
Why Environmental Firms Switch from EQuIS: Five Workflow Pain Points and When to Stay
Why environmental firms switch from EQuIS (EarthSoft): licensing cost, staff adoption, onboarding and standards upkeep, with a stay-or-switch test.
EQuIS Alternatives for Environmental Data Management: What Firms Are Actually Evaluating
EQuIS competitors compared for small environmental data management: ESdat, GAEA, Locus and Geotech by budget, firm size and program needs.