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NPDES Self Monitoring Program
STIMPEL-WIEBELHAUS ASSOCIATES, INC dba SWA AT MOUNTAIN GATE QUARRY

Organization

Stimpel-Wiebelhaus Associates
show partners
CVRWQCB

Program website

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Plan contact

Corkey Harmon
(530) 223-6605

Start date 07/31/2008
End date None
Objectives The discharger s facility consists of; a limestone quarry, rock crushing and screening plant, aggregate stockpiles, unpaved roadways, office building, portable toilets, shop building, and aboveground petroleum storage. The discharger intends to install a hot mix asphalt concrete plant within the next two years. Wastes generated at the facility include: domestic wastewater and waste petroleum products. Potential wastes include: polluted dust control wastewater and polluted storm water runoff.
Annual budget None

Basins & sub-basins monitored

  • Sacramento River (Sacramento River)
map

Sites Monitored

Name Code Latitude Longitude Map
Stillwater Creek, West Fork, above monitoring location EFF-001
RSW-001 40.725999 -122.302427 locate
Stillwater Creek, West Fork, 50 ft below monitoring location EFF-003
RSW-002 40.726785 -122.304356 locate
West Fork of Stillwater Creek, approximately 50’ below monitoring location EFF-003.
RSW-003 40.725414 -122.331682 locate

Parameters Monitored

GroupParametersFrequency
General Water Quality Electrical Conductivity (EC) , Hardness, pH, Total Dissolved Solids (TDS), Total Suspended Solids (TSS), Turbidity Annual, Monthly, Daily
Hydrology Flow Daily
Major Ions & Minerals Cyanide Annual
Mercury Mercury Annual
Metals & Trace Elements Aluminum, Antimony, Beryllium, Cadmium, Chromium III, Chromium VI, Copper, Copper , Iron, Lead, Lead , Manganese, Nickel, Selenium, Silver, Thallium, Thallium , Zinc, Zinc Annual, Monthly
Priority Pollutants Priority Pollutants Annual, Biannual
Water Toxicity Toxicity (chronic) - Ceriodaphnia, Toxicity (chronic) - Fathead minnow, Toxicity (chronic) - other Quarterly

Data Products Available

ItemAvailable OnlineURLAvailable by RequestComment
Monitoring Plan Yes http://www.waterboards.ca.gov/... Yes
Other No Yes Discharger self-report
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