International Journal of Microbiology

Research Article

Functional Gene Diversity of Selected Indigenous Hydrocarbon-Degrading Bacteria in Aged Crude Oil

Table 3

Baseline properties/characteristics of the study site.


Parameters	Method	DPR intervention limit	Concentration/quantity

pH	APHA 4500H⁺B	NA	5.97
E. conductivity (μs/cm)	Cond. Meter	NA	60
Moisture content (%)	BS 1377-2:1990 clause 1	NA	2.40
Nitrate (NO₃) (mg/kg)	APHA 4500- NO³⁻	NA	0.46
Phosphate (P₂O₅) (mg/kg)	APHA 4500-P	NA	18.24
Total organic carbon (%)	BS 1377-2:1990 clause 3	NA	31.4
Nickel (mg/kg)	ASTM D 1886	10	2.420
Lead (mg/kg)	ASTM D 3559	380	1.283
Zinc (mg/kg)	ASTM D 1691	210	52.50
TPH (mg/kg)	EPA 8015	5000	8695.77231
PAH (mg/kg)	EPA 8260	40	989.11889
THB	Spread plate	NA	3.11 × 10⁸
HUB	Spread plate	NA	2.43 × 10⁸

Method source: the American Public Health Association (APHA) 20^th Edition 2008, American Society for for Testing and Materials (ASTM), EPA: Environmental Protection Agency. Keys: Cond. Meter: conductivity meter, NA: not available, BS: British Standard, Cfu/g: colony forming unit per gram.