How many trains per day come through on the main line? How about any action in this industrial park? Google shows some tank cars:
http://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=beltsville,+md&sll=37.0625,-95.677068&sspn=41.818029,87.890625&ie=UTF8&hq=&hnear=Beltsville,+Prince+George%27s,+Maryland&ll=39.028394,-76.907923&spn=0.005026,0.010729&t=h&z=17
the tankers are switched by the what was the D781 out of Jessup - no clue what the run is now - i can ask my CSX pals.
here is the break down from the Pacer Farm
http://www.pacerfarm.org/wta.htmwe found 72 scheduled movements passing Sunnyside MD on the CSX Capital Subdivision on any day
time symbol description ttd operator origin - dest direction velocity
00:36:17 Q341 (-1) W CSX Baltimore - Cumberland W 34.40
01:01:31 * K273 (-1) Emerald Express unit trash extra T CSX Sealston - Annapolis Junction W 22.27
01:01:31 K275 (-1) Emerald Express unit trash T CSX Sealston - Annapolis Junction W 22.27
01:16:29 K952 (-1) unit rock runner E CSX Millville - Curtis Bay E 20.20
01:22:50 * Q297 (-1) automotive W CSX Baltimore - Toledo W 13.40
02:08:43 * Q252 (-2) automotive E CSX Nashville - Philadelphia E 34.40
02:44:56 Q136 (-2) intermodal E CSX Chicago - Philadelphia E 20.10
03:06:17 Q249 (-1) automotive W CSX Baltimore - Wixom W 34.40
03:20:41 Q135 (-1) intermodal W CSX Philadelphia - Chicago W 32.16
03:38:16 Q138 (-1) intermodal E CSX Chicago - Baltimore E 36.27
03:47:16 Q405 (-1) S CSX Philadelphia - Hamlet W 10.84
03:53:43 Q216 (-1) automotive E CSX Walbridge - Philadelphia E 34.40
04:51:43 Q137 intermodal W CSX Baltimore - Chicago W 36.27
05:13:05 Q276 (-1) automotive E CSX Walbridge - Baltimore E 22.93
05:18:58 Q375 (-1) W CSX Philadelphia - Lousiville W 27.20
05:43:05 Q346 (-1) E CSX Cumberland - Philadelphia E 22.93
05:54:45 P841 W MARC Baltimore - Washington W 48.00
06:21:13 P843 W MARC Baltimore - Washington W 34.50
06:36:43 Q217 (-1) automotive W CSX Philadelphia - Detroit W 36.27
06:59:15 P840 E MARC Washington - Baltimore E 48.00
07:00:00 P845 W MARC Baltimore - Washington W 60.00
07:24:15 P842 E MARC Washington - Baltimore E 48.00
07:25:00 P847 W MARC Baltimore - Washington W 60.00
08:04:39 P849 W MARC Baltimore - Washington W 31.85
08:20:15 P844 E MARC Washington - Baltimore E 48.00
08:22:04 * K322 (-2) unit coke E CSX Buffalo - Baltimore E 18.26
08:30:18 Q406 (-1) N CSX Rocky Mount - Philadelphia E 19.60
08:55:00 P851 W MARC Baltimore - Washington W 60.00
09:41:20 * K279 (-1) unit trash S CSX Oak Point - Florence W 16.08
10:19:18 Q174 (-1) intermodal N CSX Jacksonville - Worcester E 20.97
10:44:53 Q409 (-1) S CSX Selkirk - Waycross W 19.87
11:13:39 * K654 (-1) unit orange juice N CSX Tampa - Greenville E 16.08
12:01:57 Q175 intermodal S CSX Baltimore - Jacksonville W 22.97
12:19:18 L174 (-1) intermodal N CSX Jacksonville - Worcester E 20.97
12:33:48 Q173 intermodal S CSX South Kearney - Jacksonville W 26.80
12:48:48 L173 intermodal S CSX South Kearney - Jacksonville W 26.80
12:52:37 * K651 (-1) unit orange juice empties S CSX Greenville - Tampa W 13.40
13:04:18 Q176 (-1) intermodal N CSX Jacksonville - Baltimore E 20.97
13:46:18 D781 local T CSX Jessup - Dorsey W 9.20
13:47:27 Q398 E CSX Cumberland - Baltimore E 17.20
14:26:20 K277 (-1) unit trash S CSX Oak Point - Florence W 16.08
14:53:43 Q296 (-2) automotive E CSX Saginaw - Baltimore E 34.40
16:09:00 P853 W MARC Baltimore - Washington W 60.00
16:13:54 * Q207 (-1) automotive E CSX St Louis - Jessup E 15.88
16:25:32 P846 E MARC Washington - Baltimore E 51.75
16:32:37 Q410 (-2) N CSX Waycross - Selkirk E 17.03
16:55:21 D781 local T CSX Jessup - Dorsey E 5.88
16:56:15 P848 E MARC Washington - Baltimore E 48.00
17:35:15 P850 E MARC Washington - Baltimore E 48.00
17:37:56 Q343 W CSX Baltimore - Willard W 18.26
17:42:08 D782 local T CSX Jessup - Derwood W 25.30
17:54:00 P855 W MARC Baltimore - Washington W 60.00
17:54:20 K278 (-1) unit trash empties N CSX Florence - Oak Point E 32.16
18:03:32 P852 E MARC Washington - Baltimore E 51.75
18:29:00 P857 W MARC Baltimore - Washington W 60.00
18:48:39 L176 (-1) intermodal N CSX Jacksonville - Port Newark E 16.08
18:57:15 P854 E MARC Washington - Baltimore E 48.00
19:09:00 P859 W MARC Baltimore - Washington W 60.00
19:30:15 P856 E MARC Washington - Baltimore E 48.00
19:39:20 K276 (-1) unit trash empties N CSX Florence - Oak Point E 32.16
19:41:12 * K650 (-1) unit orange juice N CSX Tampa - Greenville E 26.80
19:56:12 K658 (-1) unit orange juice N CSX Tampa - Greenville E 26.80
20:12:15 P858 E MARC Washington - Baltimore E 48.00
20:25:10 Q412 (-1) N CSX Hamlet - Baltimore E 11.92
21:22:05 Q278 (-1) automotive E CSX Toledo - Baltimore E 19.30
21:41:32 D782 local T CSX Jessup - Derwood E 9.75
21:58:28 * K273 Emerald Express unit trash extra T CSX Sealston - Annapolis Junction E 22.27
21:58:28 K275 Emerald Express unit trash T CSX Sealston - Annapolis Junction E 22.27
21:58:43 Q134 (-1) intermodal E CSX Chicago - Baltimore E 34.40
22:43:05 B702 local T CSX Benning - Jessup E 15.60
23:05:10 Q368 (-2) E CSX Louisville - Philadelphia E 29.48
23:49:29 Q133 intermodal W CSX Baltimore - Chicago W 54.40