TABLE 1

GC-MS identification of the five most abundant aromatic and aliphatic compounds within the PHC mixture prior to, and after 48 hours of biodegradation.

Compound Day 0a Day 2a

Aromatics

. .
1,3,5-Trimethylbenzene

Naphthalene

2-Methylnaphthalene

1,5-Dimethyl-naphthalene

Anthracene

1.56b

3.20

3.87

5.30

0.93

ND(<0.5ng/µl)

ND(<0.5ng/µl)

ND(<0.5ng/µl)

ND(<0.5ng/µl)

ND(<0.5ng/µl)

Alkanes

. ..
Tridecane

Tetradecane

Pentadecane

Heptadecane

Nonadecane

1.89

1.85

3.12

3.75

ND(<0.5ng/µl)

5.60d

3.16(±0.70)

4.40(±0.74)

9.27d

5.17d

aPercent the specific compound makes-up of the total PHCs in liquid degradation systems; Day 0 represents the starting percent for these compounds in this study.

bThe number listed represents the listed compounds percent of the total PHCs present in the sample.

cND=Not detectable(Minimum detection limit)

dOne of the two samples was not positively identified by the GC-MS (<90% match with the HP Chemstation library); ± is the standard deviation of two samples when positively identified by the GC-MS.