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Wastewater VOC survey, July 22, 23, 24 2002

Chevron Products Company (BAAQMD Plant #A0010)
841 Chevron Way
Richmond, California 94802-0627

Intention of the study is to determine VOC emissions from wastewater, ambient air locations, and VOC emissions from ancillary wastewater system process units.

Water Sample = Coliwasa (Sample size = 250 ml glass open mouth jar) The term stands for composite liquid waste sampler. A coliwasa is designed to take a composite (from top to bottom) sample. The device used in this study is manufactured in high-density polyethylene with and Teflon coated topper. Sample size = 250 (see: ASTM D5495-94 (2001) Standard Practice for Sampling with a Composite Liquid Waste Sampler).

Air Sample = air ambient air grab sample into a 6 liter Stainless steel Summa® passivated canisters. Canisters begin evacuated and will be allowed to return to ambient in wastewater areas and sewer openings.

Mechanics of Sampling: Sewer manholes and junction boxes will be sampled via coliwasa or bucket. Bucket samples will be taken for those sample locations with water depth less than one (1) foot. Process line sampling will be use standard Chevron sampling procedures. The sample locations using coliwasa sampling will use the following procedure:

Sample prep and organizational meeting:

Non-Refinery Personnel Damian Breen, Tim Dunn, Matt Gerhardt
Refinery Personnel Richard Sandman, Bob Chamberlain
Chevron Labor: Two (2) technicians with confined space equipment (plus one laborer, if necessary)
Chevron Equipment: forklift, LEL & OVA meters
Brown & Caldwell Equipment 1 liter caged bottle sampler
BAAQMD & ARB Equipment plastic pipe: (a four foot section of three inch PVC) coliwasa tubes, associated plastic pipe to lower sampling device, measuring tape, plumb bob, 14 Summa® passivated canisters, one ice chest, ice. 10 250-ml sample glass wide mouth bottles, 80 VOA glass 40-ml sampling vials, 40 1-liter glass sampling containers, and two (2) alcohol thermometers.
Time: 30 minutes maximum per wastewater sampling location, Ambient air sampling
15 minutes maximum per air sample.

Sampling Procedure for coliwasa sampling locations


  1. Confirm if sampling area is a confined space entry using LEL meter and OVA meter. If lowering sampling device is considered a confined space activity, and then use Chevron confined space entry procedures. Monitor for explosive gases using LEL throughout sampling activity, if necessary.
  2. Take a measurement of organic gases at 2 inches below manhole lip using OVA. and record measurement.
  3. Take dimensions of sampling area and piping.
  4. Measure depth of flow
  5. Lower 3-inch pipe containing coliwasa into sampling area if flow exist. Sample wastewater inside 3-inch pipe using coliwasa.
  6. Retrieve coliwasa. Place sample in secure location
  7. Measure and record sample temperature using glass thermometer
  8. Store sample in wet ice.
  9. Retrieve 3inch plastic pipe
  10. Place used coliwasa samplers in plastic bag.
  11. Place used 3inch PVC pipe place in plastic bag.
  12. If no flow, collect air sample using Summa canister using sampling procedure detailed in ARB QA manual Volume II Appendix Q.
  13. Close sampling area.

Sampling Locations

Sample Date Chevron Drawing Sample Point Sample
Location		 Sample Type
7/22/2002 F-252053-5 5 MH 1-4-0-6 on 36-inch Main Street line Air
7 MH 1-3-0-5 on 48-inch Pipe Street line Air
8 MH 1-6-0-2 on 60-inch Division Street line Water - Coliwasa
9 MH 1-5-0-6 on 36-inch Calol Street line Water - sample thief
F-252052-4 3 Feed to 1A Separator Cell C Water - sample thief
F-252051-4 17B MH 2-2-0-3 on Foundation Street where 18-inch line enters Water - Coliwasa
18 MH 2-3-0-4 on 12-inch line north of cooling tower Water - sample thief
16B Box 2-1-0-1 on 48-inch Distillation and Reforming line Water - tap
16 Box 2-3-0-1 on 12-inch LSFO line Air
17 Box 2-2-0-1 on 18-inch Foundation Street line Water - Coliwasa
7/23/2002 F-252018-2 25D 24-inch Hill Street line at Sulfur Plant Water - Coliwasa
25C 27-inch Hill Street line near Octane Street Air
F-252026-3 25 Drain near 13 Separator Water - sample thief
28B MH 3-3-0-2 or 3-3-0-3 on 60-inch Hydro line Air
28 MH 3-2-0-4 or 3-2-0-5 on 36-inch FCC line Water - sample thief
25B 42" Storm Sewer between 13 Separator and Channel Street Water - Coliwasa
28D MH 3-3-0-4 or 3-3-0-5 on 60-inch Hydro line Water - Coliwasa
7/24/2002 30 MH 3-3-0-8 on Hydro line Water - Coliwasa
F-252027-2 32 MH 3-3-0-10 on Hydro line Water - sample thief
34 MH 3-2-0-12 on 24-inch FCC line in polypropylene plant Water - sample thief
33 MH 3-2-0-9 on 24-inch FCC line in between Cutter and Alkylate Streets Water - sample thief
F-252026-3 31 MH 3-2-0-7 on 24-inch FCC line in between Polymer and Cutter Streets Water - sample thief
31B MH 3-2-0-6 on 24-inch FCC line at turn to cross Channel Streets Water - sample thief
- 51 Equipment blank Water - Coliwasa

Note:

  1. Spiking - lab will spike a 1 out of ever ten water samples.
  2. Preservation - lab will filter and preserve wastewater samples on day samples were taken.
  3. Trip/equipment blank prepared using laboratory deionized / low organic water using unused coliwasa.
  4. One duplicate will use a coliwasa (using new coliwasa) a new section of 3-inch PVC pipe.
  5. Sample Labeling Code example: C-1 for Chevron sample point #1.
  6. Field staff will measure the relative volumes of aqueous phase and oil phase using a graduated cylinder. Staff will record phases present in sample (e.g., solids, emulsion, water layer, and oily layer).

Procedure for analyzing the wastewater samples will be EPA method 8015/8020. The wastewater samples are one phase (water). Each wastewater sample will result in two analyses (TPH gasoline & TPH diesel). McCampbell Analytical 110, Second Avenue South, D#7, Pacheco, CA 94553.

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