Polycyclic aromatic hydrocarbons (PAHs) and mono-aromatic hydrocarbons (benzene, toluene, ethylbenzene, and xylene - BTEX) are common water resource pollutants that have strong negative impact to environment and public health. PAHs are persistent, bio-accumulative, and toxic for humans and aquatic organism. BTEX due their polarity and good soluble characteristics are able to enter the soil and groundwater systems and cause serious environmental problems. All PAHs have a carcinogenic effect to human. BTEX group has a negative impact to respiratory and central nervous system. The long BTEX exposure can also effect the kidney, liver and blood systems. The principal pollution sources of these substances are municipal waste, transport, petrol deposits and other industrial sites. Republic of Moldova, as well as other countries, has many old contaminated sites by petrol products (petrol deposits, military bases, transport enterprises etc.) sites. The aim of this study is an evaluation of PAHs and BTEX in the surface soil and groundwater of an old petrol contaminated site. The studied site was in the operation as a petrol deposit in the period 1970 – 2000 years and principal pollution source is a diesel and gasoline leakage. Actually, it is a territory for the industrial purposes. The sampling plan was elaborated due to the specific local conditions for soil and groundwater. Five sampling units were sampled for the soil with the depth intervals 0 – 50 cm and 50 – 100 cm. Ten boreholes were drilled for the determination of groundwater contamination level and distribution patterns of toxic substances. The determination of PAHs and BTEX concentration in soil and water samples was made by GC-MS technology using international methodology (ISO 17943:2016; ASTM D 6889, D6520; ISO 28540:2011; ISO 13859:2014; ISO 18287:2006). The groundwater level is situated at the depths 5 – 6 m. The layer of petrol products was determined under groundwater level with the thickness 2 – 3 cm. The groundwater samples below of this layer were analyzed. The obtained results showed that PAHs contamination is accumulated in the top soil layers and in less quantity in deep horizons. The intervals of the total PAHs concentration is 0.4 – 1.43 mg/kg for soil layer 0 – 50 cm and 0.11 – 0.24 mg/kg for soil layer 50 – 100 cm. The distribution of PAHs by the number of the benzene rings following: 2 rings – 1.9 – 8.7%; 3 rings – 7.2 – 19.4 %; 4 rings – 42.2 – 58.1 %; 5 rings – 15.1 – 33.9 %; 6 rings – 0 – 25.2 %. This composition corresponds to PAHs in gasoline and diesel. The four ring PAHs were found in groundwater samples (pyrene, benz[a]anthracene). Fluorene (3 ring PAH) was determined in one groundwater sample. Other PAHs were below of the detection limit in groundwater samples. The BTEX substances are found mostly in groundwater. The groundwater system is close and BTEX are stored here for a long time. The total BTEX concentration in groundwater samples is in the interval 12.08 – 13.80 mg/l. The principal pollutant is Benzene (with the concentration interval 9.26 – 10.86 mg/l (76.7 – 78,7 % of the total BTEX). The next BTEX pollutants are m-xylene (1.56 mg/l) and p-xylene (0.58 – 0.66 mg/l). Other have the following concentrations: toluene 0.26 mg/l; ethylbenzene 0.23 mg/l; o-xylene 0.20 – 0.23 mg/l. The volume of contaminated soil and groundwater was evaluated for the elaboration of remediation actions. This study suggests that exposure to BTEX and PAHs from petrol contaminated sites is correlated with an increased risk of health effects need to take proper measures. The bioremediation is recommended as one of environmental friendly approach for the reduction of the contamination level by PAHs and BTEX substances at petrol-contaminated sites.