BCSE202410071104S16S17BGC run had some submitted samples out of order. All samples run on GC in numerical order. Series 16 samples out of order, submitted in following sequence: …10, 11, 16, 13, 14, 15, 20, 17, 18, 19, 12, check, 21, 22….

GC Run SWFG series39 10/8/2024 2 vials out of order at sampling: 14 and 15 were switched at sampling, so will be run in the order …12, 13, 15, 14, 16, 17…. GC Run SWFG series41 10/23/2024 2 vials out of order at sampling: 93 and 94 were switched at sampling, so will be run in the order …92, 94, 93, 95, 96….

GC run of LTER gas samples, sequence LTER20240913S11BGC Vials submitted in trays out of order as follows: …115, 116, 120, 117, 118, 119, 121, 122, 123, 124, 128, 125, 126, 127, 132, 139, 142, 129, 136, 135, 138, 140, 131, 134, 137, 144, 143, 130, 141, 145, 146, 171, 172, 149, 150, 167, 168, 153, 154, 163, 164, 157, 158, 159, 160, 161, 162, 155, 156, 165, 166, 151, 152, 169, 170, 147, 148, 173, 174, 175, 176, 177, 178, 179, 184, 180, 181, 182, 183, 185, 188, 187, 186, 189, 192, 191, 190, 193, 194, 195, 196…. All vials run sequentially on GC. Looked at field sheets - appears that vials up to 171/172 were likely sampled in proper order, and just jumbled up on trays. It is possible vials sampled in correct order after 172, but there are some field sheet issues with those, along with being submitted out of order.

LTER Series 10 8/20/2024 File: LTER20240810S10BGC Note from Techs on sampling vial error: “Start 1 and 2 out of order vials 1-40 (1=21, 2=22)” May be more notes on sampling sheet? A number of vials submitted out of order. All vials run in sequential order on GC. Vials out of order in tray: …41, 42, 55, 56, 45, 46, 51, 52, 49, 50, 47, 48, 53, 54, 43, 44, 57, 58, 59….

BCSE202407190731S12S13BGC: All vials run in consecutive order. Vials submitted by techs in this order for Series 12: 1, 18, 3, 4, 5, 14, 7, 8…. ….12, 13, 6, 15, 16, 17, 2, 19, 20, 21…. all other vials in order.

LTER20240724S8BGC GC sequence: Samples all run in sequential order on GC. Samples somewhat mixed up in trays presented by techs. Tray vial order as submitted to lab noted here: 145, 146, 171, 172, 149, 150, 167, 168, 153, 154, 163, 164, 157, 158, 159, 160, 161, 162, 155, 156, 165, 166, 151, 152, 169, 170, 147, 148, 173, 174, 175, 176, … Then in order till 252, 253, 262, 263, 264, 257,258, 259, 260, 261, 254, 255, 256, 265, 266, ….

SWFG2024071607180722S24S25S26AGC sequence saw GC reboot and restart around sample vial 194 of the “B” round (N2O/CO2 analysis). N2O peak cut off and did not integrate. After sequence completion, re-ran sample group vials 191-194 under sequence name SWFG2024071607180722S24S25S26AGC_B. Results fairly consistant, and now have N2O data for sample vial 194.

LTER20240711S7BGC - samples 296 and 292 swapped in sample tray submitted by techs. All samples run in sequential order on GC.

Notes on GC run LTAR202406110618S12S13BGC : S12 - all samples run in numerical order, samples 7 & 8 were switched in field tray, samples 141 and duplicate 1 were swapped in field tray - order corrected in GC tray and run in numerical order S13 - note from field tech: vials 133-136 swapped with 141-144. All samples run in numerical order on GC

Running 3 series of GLBRC gas samples. Notes on Series 6 from Techs - Vials 1-40 swapped, i.e. vials 1-20 are actually vials 21-40 regarding site sampling. Series 7 no notes. Series 8 - a number of vials out of order. All samples run in numerical order. Series 8 vial order in trays: 1-40 ok, then 41, 42, 59, 60, 45, 46, 55, 56, 49, 50, 51, 52, 53, 54, 47, 48, 57, 58, 43, 44, 61, 62, 63,…

SWFG Gas sampling notes: Series 10, Vials 1 and 25 swapped at sampling time - noted on field sheet and run on GC in that order (i.e. 25, 2, 3, 4, 5… 24, 1, 26, 27, etc.) Elias’ previous samplings of Blocks 2 & 4 may have been completed in opposite order of sheet - moving west to east instead of east to west in each instance. He corrected that on series 11 sampling. Will have to confirm, but mirrored samplings may have occurred on series 8 and 9.

GLBRC Series 4 vials. Note from techs that vials 1 and 21 were swapped (i.e. 21, 2, 3, 4, 5…20, 1, 22, 23, etc.). Still run on GC in consecutive order (1, 2, 3, etc…)

BCSE Series 3 05/07/2024 - Vial 79 dropped and broke. Replaced vial with nitrogen blank.

LTAR Series 8 vials out of order. All vials run on GC in sequential order. One set of vials out of order and submitted in the following sequence: …84, 85, 88, 87, 86, 90, 91, 92…

LTAR202404230430S6S7BGC LTAR series 6 vial mixup. All samples run in numerical order. Tech order in trays/racks: …25,26, 28 , 27 ,29,30…., ….48, 73 ,50,51,52, 77 ,54,55,56, 61 ,58,59,60, 57 ,62,63,64, 49 ,74,75,76, 53 ,78,79,80… LTAR series 7 vial mixup …108,110,109,111,112….

LTER20240425S2BGC GC run Appears that vial 11, std 3.0 is off/incorrectly made, compared with all the other standards.

LTAR Series 2 and 3, datafile LTAR2024403280404S2S3BGC notes: Series 2 had a number of vials out of order received by techs. All vials run in order on GC. Vial order from techs in trays: …95, 96, 117, 101, 99, 100, 121, 102, 103…. then …115, 116, 97, 118, 119, 120, 98, 122, 123…. Series 3 only had one vial pair out of order - 57 and 58 were swapped in the tray. All vials run in numerical order.

First LTAR gas chamber sampling run on the GC. All samples run in numerical order. Rack order as submitted by techs had these two issues: vials 98 and 101 were swapped, and vials 135 and 131 were swapped. (Meaning order submitted was …96,97,101,99,100,98,102… and …129,130,135,132,133,134,131,136…. respectively.)

LTER20240306S17 GC run notes: Vial 20 broke in transport. Dave refilled vial with N2 and ran in series - should have blank results for vial 20. All samples run in numerical order, though received vials 163 and 164 swapped in tech’s sample tray.

Vial error on BCSE Series 20 run. Lost nitrous oxide values for vial 66, but was able to continue run uninterrupted otherwise. Setup a separate run that just included a blank vial and vial 66. Transferred those N2O values to the BCSE Series 20 run results for vial 66. CO2 values slightly different, but kept the original values. Rerun saved under same name with a “-A” added at the end of directory/filename.

Found an error in naming a recent run. January, 2024 collection and run for BCSE samples was recorded as Series 18, when it should have been Series 19. This has been corrected in the data file storage on BenGC computer. Updated data directory name to \BCSE20240110S19BGC 2024-01-10 13-09-04. Excel results file found in that folder was also corrected, changing all S18 samples to S19. File sent to Kevin for approval while error corrections are fresh in our minds…

Vial notes for GC run LTER20240206S16BGC.PRP: All vials run in numerical order. Vials swapped in trays received from Techs: 46 & 47, 50 & 51, 66 & 67. i.e. Vials received in this order 44, 45, 47, 46, 48, 49, 51, 50, 52, 53… but run in this order 44, 45, 46, 47, 48, 49, 50, 51, 52, 53….

Combo sampling run of LTER/GLBRC samples - Everything run in order until end of BCSE samples. Tech note that Ambient 1 was actually Duplicate 2. So last 8 BCSE samples physically run in this order: Dup1, Amb1, Dup3, Dup4, Dup2, Amb2, Amb3, Amb4. The sample queue in the software is Dup1, Dup2, Dup3, Dup4, Amb1, Amb2, Amb3, Amb4.

GC run corrections LTER Series 13, collected 11/2/2023. Filename LTER20231102S13BGC.PRP Vials all run in numerical order on GC analysis. Some vials submitted were out of order in the racks. Out of order vials: …176, 177, 182, 179, 180, 181, 178, 183, 184…

LTER Series 12 (10/06/2023) GC analysis notes: All vials run in numerical order. Vials 16 and 14 switched in sampling tray. Vials 73 and 93 switched in sampling tray. Ambient 2 vial broke - replaced with a blank sample (N2). During run second pass, vial #17 at position 31, the analysis paused with the vial lost from the autosampler rack (found on chair). Vial replaced and analysis started back up - GC made CO2 injection and continued on with the run.