Table IV: Number of signal and background events for LHeC/QCDE-2 with L$_{int}$ $^{= 1}$fb − $^{1}$. Table V: Achievable compositeness scale ( Λ in TeV units) at LHeC/QCDE-2 for $^{5}$σ ( $^{3}$σ ) statistical significance. IV. CONCLUSION 11 It seems that QCD Explorer stage(s) of the LHeC, together with providing necessary information on PDF’s and QCD basics, could play essential role on the BSM physics, also. Concerning color octet electrons. LHeC/QCDE-1 will cover M$_{e}$ 8 mass up to O( 1200 GeV), whereas LHeC/QCDE-2 will enlarge covered mass range up to O( 1700 GeV). The discovery of e 8 at this machine, simultaneously will determine compositeness scale. For example, if M$_{e}$ 8 = 500 GeV LHeC/QCDE-2 with L$_{int}$ = 10 fb − 1 will be sensitive to ∧ up to 570 TeV. M$_{e}$ 8 , GeV ∧ = M$_{e}$ 8 ∧ = 10 TeV S B S B 500 $^{3}$.3 × 10 7 $^{1}$.4 × 10 3 $^{9}$.8 × 10 4 940 750 $^{3}$.9 × 10 6 1000 $^{2}$.6 × 10 4 445 1000 $^{5}$.0 × 10 5 630 $^{5}$.8 × 10 3 210 1250 $^{5}$.3 × 10 4 270 980 76 1500 $^{3}$.5 × 10 3 77 89 16 1750 55 6 2 1 M$_{e}$ 8 , GeV L$_{int}$ $^{= 1}$fb − 1 L$_{int}$ $^{= 10}$fb − 1 500 245 ( 320 ) 440 ( 570 ) 750 150 ( 195 ) 275 ( 355 ) 1000 82 ( 110 ) 155 ( 205 ) 1250 41 ( 56 ) 81 ( 107 ) 1500 16 ( 23 ) 34 ( 46 )