52 Mr Westwood also placed some reliance, as a comparative sale of a landfill site, on a contingent sale agreement dated 24 March 1995 in relation to 230 hectares of land near Brighton known as Jews Hill. That sale was not completed. As with Dulverton, Mr Westwood agreed in cross-examination that Jews Hill was only a comparable sale if the waste stream to go to that site was the same as the waste stream to go to the Downie site, which he took to be 35,000 tonnes per annum. The Jews Hill agreement was not in evidence when Mr Westwood initially gave evidence. When the agreement was later put into evidence it became apparent that Mr Westwood had some mistaken beliefs about its contents. The consideration was $145,000, together with a further amount of $20,000 in the event that the property was rezoned for use as a waste disposal site. In addition, it was agreed that if used as a waste disposal site, the purchaser would pay the vendor a royalty of 50 cents per compacted cubic metre of material deposited on the site for 10 years up to a maximum of $225,000. An area of 38 hectares on the Jews Hill site had been identified as a suitable footprint for a regional waste disposal site in the Draft Waste Management Strategy released by the Clarence City Council in November 1995. In that report, of the 16 regional sites assessed, the Jews Hill site received the second worst environmental rating. Mr Westwood mistakenly read that report as giving the site the second best environmental rating. Mr Westwood understood that the benefit provided by the agreement, if the land was used for refuse disposal, was the payment of a royalty of $25,000 per annum for 10 years; the benefit was in fact the payment of $20,000 plus a royalty over a period of 10 years of up to a maximum of $225,000. Mr Westwood discounted a royalty of $25,000 per annum for 10 years at 4.5 per cent to arrive at a capital value of $197,817, which he considered was the value of the waste disposal site aspect of the sale. He accordingly capitalised the sale price at $145,000, plus $197,817, that is, $342,817. Mr Westwood assumed that the value of an area of 10 hectares that was needed for a buffer zone was $1,000 per hectare. He was of the mistaken belief that the agreement for sale related only to the footprint of 38 hectares and a buffer zone of 10 hectares, that is, a total of 48 hectares. On this basis he made the following calculation: