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The Air District is issuing an air quality advisory due to smoke from the Crystal Fire in Napa County for today, Wednesday, June 5. Localized smoke impacts are possible near Angwin and may impact the Napa Valley from St. Helena to Calistoga. We will be closely monitoring air quality for smoke impacts from this incident.

The Air District will host its first career fair on Tuesday, October 6, from 10am to 2pm at Saint Mary's Cathedral in the St. Francis Hall. The career fair will provide information about job opportunities at the Air District, and will give attendees an opportunity to speak to current employees about their areas of expertise.

Thg10 1, 1996 ... Source Test Procedure ST-31 PERCHLOROETHYLENE REF: Regulation 8-27-302 1. APPLICABILITY 1.1 This procedure is used to quantify emissions of perchloroethylene. It is applicable to the determination ...

Thg10 1, 1996 ... Source Test Procedure ST-23 WATER VAPOR (Adopted January 20, 1982) 1. APPLICABILITY 1.1 This method is used to quantify the water vapor content of stack gases. It is applicable in all cases in which ...

Thg7 14, 2017 ... MOP Vol. IV ST-40 Strippable Volatile Organic Compounds SOURCE TEST PROCEDURE ST- 40 STRIPPABLE VOLATILE ORGANIC COMPOUNDS REF: Regulation 11-10 1. APPLICABILITY 1.1 This procedure is used to ...

Thg10 1, 1996 ... Source Test Method ST-29 VINYL CHLORIDE Adopted April 21, 1982 REF: Regulation 11-6 1. APPLICABILITY 1.1 This method is used to determine emissions of vinyl chloride. It is applicable to the ...

Thg9 27, 1996 ... Source Test Procedure ST-18 STACK TRAVERSE POINT DETERMINATION (Adopted January 20, 1982) 1. APPLICABILITY 1.1 This procedure is used to determine the number and location of traverse points required ...

Thg9 26, 1996 ... Source Test Procedure ST-2 BERYLLIUM (Adopted January 20, 1982) REF: Regulation 11-3-301 1. APPLICABILITY 1.1 This procedure is used to quantify emissions of Beryllium. It determines compliance with ...

Thg9 27, 1996 ... Source Test Method ST-8 DIMETHYLSULFIDE (Adopted January 20, 1982) REF: Regulation 7-303 1. APPLICABILITY 1.1 This method is used to determine emissions of dimethylsulfide (DMS). It is applicable ...

Thg9 27, 1996 ... Source Test Procedure ST-10 MERCURY Adopted (January 20, 1982) REF: Regulation 11-5-301 1. APPLICABILITY 1.1 This method is used to quantify emissions of gaseous and particulate mercury. It ...

Thg10 1, 1996 ... Source Test Procedure ST-25 FLUORIDE, INTEGRATED SAMPLE (Adopted January 20, 1982) REF: Regulation 10-1-301 1. APPLICABILITY 1.1 This method is used to quantify emissions of fluoride. It ...

Thg9 26, 1996 ... Source Test Procedure ST-1B AMMONIA INTEGRATED SAMPLING (Adopted January 20, 1982) REF: Regulation 7-303 1. APPLICABILITY 1.1 This method is used to quantify emissions of ammonia. It ...

Thg10 1, 1996 ... Source Test Procedure ST-33 GASOLINE CARGO TANKS (Adopted October 7, 1987) REF: Regulation 8, Rules 33 & 39; CH&SC, Section 41962 1. APPLICABILITY 1.1 This test procedure is used to quantify the leak ...

Thg10 7, 1996 ... Source Test Method ST-16 PHENOLIC COMPOUNDS (Adopted January 20, 1982) REF: Regulation 7-303 1. APPLICABILITY 1.1 This method is used to quantify emissions of phenolic compounds as phenol. It is ...

Thg10 1, 1996 ... Source Test Procedure ST-32 ETHANOL, INTEGRATED SAMPLING (Adopted December 21, 1988) REF: Regulation 8, Rule 42 1. APPLICABILITY 1.1 This procedure is used to quantify emissions of ethanol. It ...

Thg9 27, 1996 ... Source Test Procedure ST-9 LEAD Adopted (January 20, 1982) REF: Regulation, 11-1-301 1. APPLICABILITY 1.1 This procedure is used to quantify emissions of Lead. It determines compliance with ...

Thg10 1, 1996 ... Source Test Procedure ST-28 HYDROGEN SULFIDE, INTEGRATED SAMPLING (Adopted January 20, 1982) REF. Regulation 10-8-303 1. APPLICABILITY 1.1 This method is applicable for the determination of hydrogen ...

Thg9 27, 1996 ... Source Test Procedure ST-17 STACK GAS VELOCITY AND VOLUMETRIC FLOW RATE (Adopted January 20, 1982) 1. APPLICABILITY 1.1 This procedure is used to determine stack gas velocity and to ...

Thg10 1, 1996 ... Source Test Method ST-35 TOTAL AND HEXAVALENT CHROME (Adopted January 18, 1989) REF: Regulations 11-8-301, 310, 330 1. APPLICABILITY 1.1 This method is used to quantify total and hexavalent chromium ...

Thg10 7, 1996 ... Source Test Method ST-12 COLLECTION OF ODOROUS SAMPLES (Adopted January 20, 1982) REF: Regulation 7-401 1. APPLICABILITY 1.1 This method is used for the collection of odorous samples to be ...