Keeping a Site Journal for the proprietor is often a legal requirement site supervisors must meet.

Several standards specify what must be entered or what should be entered in a Site Journal.

Without claiming of completeness, some are listed below (based on several ENs and ENVs):

Directive on the protection of, and repair works on, concrete buildings
(1) This directive requires that site supervisors, their representatives or skilled site workers keep continuous trackable records of any and all relevant data for the type and size of ongoing building operations thay may influence the quality and durability of the structure, e.g. by keeping a Site Journal. The following items are the minimum requirement (according to DIN 1045, section 4.3):

1. Weather, air temperature, humidity (if required), material temperature during the use of these materials at any section and structural part till sufficient hardening. A special note should be made for days on which the treatment conditions were not met (e.g. frost, rain).
2. Materials processed
3. Supplier and delivery note number; batch number (if required)
4. Records of work processes and inspections according to work and handling instructions.

According to DIN V ENV 1992-1-1
P (3) Important findings must be recorded in written form (e.g. Site Journal) and accessible to everyone involved. ...
(7) According to ENV 206, the Site Journal should contain the concrete data listed in Sections 10.3 or 11.2.1 and at least the following information:

1. Time spent on individual operations (e.g. concrete injection, formwork removal)
2. Delivery of materials and structural components (especially pre-fab parts)
3. Results of tests and measurements
4. Observations made when measuring the position of reinforcements and tendons
5. Description of special events

1. Type and strength category of cement and type of aggregate
2. Type of admixtures and the approximate quantity of admixtures (if required)
3. Target water/cement value
4. Results of earlier tests of the mixture such as production checks or suitability tests

1. Supplier names for cement, aggregates, admixtures and additives
2. Delivery note numbers for cement, aggregates, admixtures and additives
3. Origin of the added water
4. Concrete consistency
5. Gross density of the fresh concrete
6. Water/cement value of the fresh concrete
7. Quantity of water in the fresh concrete
8. Quantity of cement
9. Date and time when the samples were taken
10. Quantity of samples
11. Cycle of work flows during injection and curing of concrete
12. Temperature and weather conditions during injection and curing of concrete
13. Structural component in which the respective batch number was used.

1. Supplier name
2. Delivery note number

According to DIN 1045 - 4.3
The following in formation (in checkable form, entry in the Site Journal with all relevant and available documents) to be provided for all works that are subject to authorization:

1. Time spent on individual operations.
2. Air temperature and weather conditions, days with temperatures below zero: state temperature and time when it was measured... at temperatures below +5°C and above +30°C it is also important to measure the temperature of the fresh concrete.
3. When using site-mixed concrete: the names of suppliers and delivery note additives, concrete composition, cement content, type and strength category of cement.
4. When using ready-made parts: the names of the suppliers and the delivery note numbers. In addition, specify for which structural part and for which section the material was used.
5. When using ready-mixed concrete: the names of suppliers and the delivery note numbers
6. Producing of test specimens with proper designation
7. Test results of fresh concrete inspections (if required)
8. Type of reinforcement and test results of welding (if required)