EQ provided technical assistance to a commissary in Fairfield, Ohio, that was constructed without a proper pretreatment system and could not meet County limitations. EQ served on the client's behalf in soliciting bids for turnkey installation of a wastewater pretreatment system designed to treat about 30,000 gpd.

EQ prepared bid packages, collected flow data and analytical data to assist bidders, reviewed bids, and provided recommendations throughout the review process. EQ also collected treatability samples, performed an economic analysis, participated in meetings with regulatory personnel, provided oversight during design and construction, and conducted performance testing.

On subsequent assignments, EQ provided oversight on WWTP construction and start-up, and reviewed the site's wastewater discharge permit.

The EQ wastewater engineering group designed and installed a wastewater pretreatment plant in Botetourt County Virginia. The wastewater plant, which was designed to manufacture automotive clutch plates for transmissions, was designed to treat 80 gpm of metal finishing wastewater. The system included equalization, pH neutralization, metal precipitation, inclined plate clarification, sludge thickening, and sludge dewatering. EQ also coordinated with Botetourt County and the Roanoke Regional Water Pollution Control Plant for preparation of all applicable wastewater permits.

The chemical company was a former manufacturer of pesticides and herbicides, including 1,1,1 Trichloro 2,2-bis (p-chlorophenyl) ethane (DDT), polybromated biphenyls (PBBs), and hexabromobenzene (HBB). "Hot-spots" in the sediment contained DDT concentrations as high as 33,000 mg/kg, and concentrations decreased as down-river distance from the site increased. To manage the cleanup of this site, EQ isolated the "hot-spots" via the installation of 1,250 linear feet of driven sheet piling. Once isolated, dewatering and sediment stabilization and excavation were performed. Water removed from the isolated area was treated through a 2,000-gallon-per-minute (gpm) water treatment system (WTS) with direct discharge return to the river. Due to the size, batch holding was not provided pending receipt of confirmatory analysis; instead, samples were collected and analyzed on a flow-proportioned basis. The WTS consisted of a flow-proportioned chemical feed system for coagulation and flocculation, dissolved air flotation of the light sediment and oils, particulate filtration, activated carbon removal of dissolved organic constituents, and final particulate filtration at 0.5 micron. EQ was responsible for the design and installation of the sheet piling; site civil support such as roadways, sediment staging pad, and water treatment pad; and the design, procurement, installation, and operation of the WTS.

Since 1990, EQ has managed 61 projects for this large utility company in support of wastewater and storm water regulatory programs under the Clean Water Act. EQ has conducted storm water monitoring and NPDES individual permit applications (Forms 1 and 2F) for the William H. Zimmer Station, the William H. Zimmer Landfill, W.C. Beckjord Landfill, Miami Fort Station, East Bend Station (including landfill area), Miamiview Landfill, Lawrenceburg Landfill, and the Erlanger Kentucky Gas Plant. EQ has also performed annual storm water monitoring at these facilities. EQ has conducted sampling and prepared wastewater permit applications for the William H. Zimmer Station, W.C. Beckjord Station, Miami Fort Station, and the East Bend Station. Wastewater sampling was also performed at the Brecon Service Center to tie into the Cincinnati MSD, and wastewater sampling and individual application preparation (Forms 1 and 2C) were conducted for the Western Hills Service Center. We have also performed process well sampling and analysis at the Woodsdale (Trenton, Ohio) Generating Station; testing of hydrostatic pipelines at several locations in Ohio; and testing of collected water in natural gas pipelines.

EQ provided multitask storm water technical assistance to a paper manufacturing facility in Ohio. To satisfy the storm water monitoring and pollution prevention requirements in the state-issued general permit, EQ performed three tasks: preparation of a similar discharge request, storm water monitoring, and technical review of the SWP3. In order to minimize field labor and analytical costs, EQ evaluated the mill's 16 storm water outfalls and reduced the number of outfalls requiring monitoring to four. EQ also performed the storm water monitoring and prepared the monitoring report for inclusion in the SWP3. The final task involved a completeness and technical review of the mill's in-house-developed SWP3. EQ's water field staff have also regularly conducted storm water sampling/monitoring to meet permit requirements.

EQ's water management staff provided storm water/wastewater assistance at one of the largest manufacturing facilities in the country. The following tasks were completed:

1. update the SWP3;
2. assist in identifying non-storm water connections that contribute to dry weather flow;
3. provide recommendations and design concepts for use of the spill retention/primary treatment system in the area north of CAMO 3;
4. in conjunction with the facility CAD staff, revise drawings to provide more accurate information; and
5. assist in conducting manufacturing process evaluations to identify wastewater entering the sanitary or industrial sewers.

EQ provided quick-turnaround wastewater pretreatment assistance to a confidential resin manufacturer in Indiana. The client is regulated under the organic chemicals, plastic, and synthetic fibers (OCPSF) effluent category and is subject to semi-annual compliance monitoring and reporting. EQ's client was under a U.S. EPA compliance order to perform a complete water balance of the facility, conduct semi-annual compliance monitoring and reporting, and evaluate the applicability of the combined wastestream formula (CWF) to the facility. EQ conducted a thorough site inspection, recommended locations for water meter installations to support the 30 days of flow monitoring required for the CWF, developed process flow diagrams, completed a plant-wide water balance, developed alternative effluent limitations based on flow data, and prepared narrative unit operation descriptions. EQ also installed a flow meter at the discharge point to monitor total plant discharges over the 30-day period and collected 24-hour flow proportional samples for four consecutive days in support of the semi-annual compliance report.

In response to 1993 amendments to the OCPSF Categorical Pretreatment Standards, EQ updated the client's baseline monitoring report by sampling and analyzing the wastewater for 11 additional pollutants covered under the amendments.

EQ assisted an integrated steel mill in preparing an NPDES permit application for four storm water outfalls previously not regulated under the NPDES permit program. We conducted a site investigation to identify storm water outfalls requiring a permit to discharge, developed a site drainage map, and conducted storm water monitoring at the four outfalls during a representative storm. EQ also prepared an individual storm water permit application.

EQ determined the percent contribution of on-site and off-site storm water runoff to the wastewater outfalls in order to adjust pollutant mass limitations in the NPDES permit. EQ conducted a thorough field inspection using various municipal and site sewerage maps and topographic maps to delineate the drainage areas to each wastewater outfall. Using the rationale formula and established precipitation data for the area, EQ calculated peak runoff rates and estimated total contributions from on-site and off-site storm water runoff.

EQ also prepared and certified a Storm Water Pollution Prevention Plan (SWP3) under the general permit program. The scope of work involved a thorough site inspection for significant materials, possible non-stormwater contributions, structural and non-structural best management practices, and regulated point source discharges; preparation of the SWP3; and certification of the plan.

EQ's multidisciplinary staff provide key services covering the total spectrum of your environmental engineering requirements from project planning to complex site assessment/remediation projects. This listing contains just a few of the projects that EQ has completed for our clients.

If you would like additional information or if you have any questions concerning these projects please contact EQ at (800) 229-7495.