A solvent composition useful for liquid delivery MOCVD, comprising toluene and a Lewis base, wherein toluene is present at a concentration of from about 75% to about 98% by volume, based on the total volume of toluene and the Lewis base. The apparatus includes a buckle and a lap anchor. 3 gcc, wherein the high density adsorbent is in substantially contiguous contact with the low density adsorbent and each of the high density adsorbent and the low density adsorbent has an adsorbent surface area of at least 500 m2g. The effluent is pumped up to the geothermal field during off-peak periods of electric consumption, and the hydroelectric generation is accomplished during periods of peak electric demand. The guiding elements include at least two masts fixed in the ground and arranged in the median plane of the construction along an axis F substantially parallel to the flow direction of the water and collars, designed to slide along the masts. The bellows member has lower ridges in its center as well as regular ridges on both sides thereof to more effectively absorb over-vibration of an exhaust system of an automobile and to enhance durability of the bellows member.